CN114798873A

CN114798873A - High-speed punch forming process for pipe joint and integrated equipment thereof

Info

Publication number: CN114798873A
Application number: CN202210447413.9A
Authority: CN
Inventors: 方志权; 梁志展
Original assignee: Guangzhou Lanfa Automation Equipments Co ltd
Current assignee: Guangzhou Lanfa Automation Equipments Co ltd
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2022-07-29
Anticipated expiration: 2042-04-26
Also published as: CN114798873B

Abstract

The invention discloses a high-speed punch forming process for a pipe joint and integrated equipment thereof, wherein the process comprises the following steps: the feeding device automatically conveys the bar materials on the material rack to the heating device; the bar stock is heated in a heating device in a multistage way by adopting a stage heating mode; after the heating temperature of the bar reaches the final preset temperature, the bar is automatically conveyed to a cutting position through a feeding device; controlling the fixed length at the cutting position through a fixed length device and cutting off the bar stock through a cutting device to obtain a cut-off stub bar; and the stub bar is conveyed into the stamping device through the first manipulator for stamping to obtain a pipe joint blank, and the pipe joint blank is conveyed into the blank collecting box through the second manipulator. The whole forming process is automatically finished, the traditional 5 processes are integrated into a whole machine, the production space is saved, the graded non-contact heating is adopted, the bar is uniformly heated, the ductility is better during punch forming, and the energy is saved by more than 50%; and punching and shearing the bar stock in a molten state to cut off the bar stock without cutting chips.

Description

High-speed punch forming process for pipe joint and integrated equipment thereof

Technical Field

The invention relates to the technical field of pipe joint forming, in particular to a high-speed punch forming process for a pipe joint and integrated equipment thereof.

Background

The existing traditional pipe joint blank forming equipment comprises the following equipment to form a production line:

cutting machine: the blank of a single pipe joint is cut by a copper bar material in a fixed length manner, and besides the limited fixed length precision, cutting scraps can also be generated; when sawing, the noise is above 90 db.

Heating machine: the fixed-length blanks are conveyed to the equipment through the logistics vehicle and heated by temperature control.

Thirdly, punching: the heated blank is conveyed to a feeding position through a material conveying device, and then the disordered blank is manually fed.

Fourthly, the burr removing machine with flash: due to the limitation of the fixed length precision of the blank, the punched and formed pipe joint blank is easy to generate flash and needs to be cleaned manually or by equipment.

Therefore, the traditional production equipment and process have the following defects:

the logistics path is long, the occupied area is large, the automation degree is limited, and the energy consumption is high;

cutting chips and noise are generated;

the fixed length precision is limited, the stamping stroke in all directions cannot be automatically adjusted, non-edges are easy to generate, and secondary treatment is needed;

the traditional punching machine needs a special foundation, and has large vibration and high noise;

the heating temperature of the smelting furnace is difficult to control, and the quality level of the finished product is limited.

Therefore, there is a need for a high speed press forming process for a pipe joint and an integrated apparatus thereof to at least partially solve the problems of the prior art.

Disclosure of Invention

In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

In order to at least partially solve the above problems, the present invention provides a high-speed press forming process for a pipe joint and an integrated apparatus thereof, comprising: the feeding device automatically conveys the bar materials on the material rack to the heating device; the bar stock is heated in a heating device in a multistage way by adopting a stage heating mode; after the heating temperature of the bar reaches the final preset temperature, the bar is automatically conveyed to a cutting position through a feeding device; controlling the fixed length at the cutting position through a fixed length device and cutting off the bar stock through a cutting device to obtain a cut-off stub bar; and conveying the cut stub bar into a stamping device through a first manipulator for stamping to obtain a pipe joint blank, and conveying the pipe joint blank into a blank collecting box through a second manipulator.

Preferably, the heating device adopts a gas heating mode, eight-level heating is set at most, and the final preset temperature is 650 +/-13 ℃.

Preferably, each stage of heating of the heating device is provided with a temperature control sensor for monitoring temperature, the heating temperature of each stage is fed back to a heating control system of the equipment through the temperature control sensor, the heating temperature of each stage is controlled through the heating control system, and the graded stage number and the heating temperature of each stage are preset and displayed on a human-computer interface.

Preferably, the punching means includes: the stamping die comprises a base, wherein a lower die core is arranged on the base, two opposite sides of the lower die core are respectively provided with a transverse stamping mechanism, the base is also provided with at least two guide posts, the guide posts are provided with a moving mechanism in a sliding manner, the moving mechanism is controlled to slide by a driving mechanism fixedly arranged at the tops of the guide posts, and the bottom of the moving mechanism is provided with an upper die core corresponding to the lower die core;

when the cut stub bar is conveyed to the lower die core, the driving mechanism controls the moving mechanism to move downwards, so that the upper die core and the lower die core are matched and locked, and then the cut stub bar is subjected to punch forming through the transverse punching mechanism.

Preferably, the moving mechanism comprises an upper moving block and a lower moving block which are arranged on the guide post in a sliding manner, the top of the upper moving block is connected with the driving mechanism, the bottom of the upper moving block is connected with the top of the lower moving block through a fixed post, and the bottom of the lower moving block is fixedly provided with an upper mold core.

Preferably, the lower moving block is further provided with a demolding mechanism, the demolding mechanism comprises a driving part, the driving part is fixedly arranged at the top of the lower moving block, the lower moving block is provided with a first round hole, a driving column is arranged in the first round hole, the driving column is connected with the output end of the driving part, and power for moving up and down in the first round hole is provided for the driving column through the driving part;

a second round hole communicated with the first round hole is formed in the top end of the upper mold core, a third round hole is formed below the second round hole, a fourth round hole is formed below the third round hole, the diameter of the second round hole is larger than that of the third round hole, and the diameter of the third round hole is larger than that of the fourth round hole;

the utility model discloses a spacing mechanism of a motor, including first round hole, second round hole, drive post, push rod, limiting ring, spring, the third round hole is equipped with the push rod in the third round hole, the top of push rod upwards extends to in the second round hole, the top of push rod be used for with the drive post butt, the bottom of push rod can be stretched out by the bottom surface of last mould core, the part that the push rod is located the third round hole is equipped with the spacing ring, the top that just is located the third round hole in the second round hole is equipped with the limiting ring who is used for restricting the spacing ring rebound, the bottom surface of spacing ring with be equipped with the spring between the top of fourth round hole.

Preferably, the driving mechanism includes: the connecting seat is fixedly connected with the guide post, the top end of the connecting seat is fixedly connected with a connecting cylinder, the top end of the connecting cylinder is fixedly connected with a connecting block, and the top of the connecting block is provided with a liquid supplementing oil tank;

the middle part of the connecting block is provided with a high-pressure piston rod, the inside of the connecting cylinder is provided with a mold locking piston rod in a sliding manner, the bottom end of the mold locking piston rod penetrates through the connecting seat and is fixedly connected with the upper moving block, the top end of the mold locking piston rod is provided with a fifth round hole into which the bottom end of the high-pressure piston rod is inserted, the top end of the fifth round hole is provided with a stepped hole for mounting a first sealing ring, and the inner side and the outer side of the first sealing ring are respectively connected with the high-pressure piston rod and the mold locking piston rod in a sealing manner;

the outer side, close to the top end, of the mode locking piston rod is connected with the connecting cylinder in a sealing and sliding mode, a second sealing ring is fixedly arranged at an opening at the bottom end of the connecting seat in a sealing mode, the inner side of the second sealing ring is connected with the mode locking piston rod in a sealing and sliding mode, and a cavity formed by the top surface of the mode locking piston rod and the bottom surface of the connecting block is an oil filling cavity;

the oil filling device comprises a connecting block, an oil filling cavity, a pressure maintaining oil filling port, a high-pressure oil filling port, a pressure maintaining oil path and a high-pressure oil path, wherein the pressure maintaining oil filling port and the high-pressure oil filling port are arranged on the side surface of the connecting block;

an annular oil way communicated with the high-pressure oil way is arranged on the high-pressure piston rod and positioned on the outer side of the connecting block in a circle, a radial oil way communicated with the annular oil way is arranged inside the high-pressure piston rod, an axial oil way is communicated below the radial oil way, and the axial oil way penetrates through the bottom end of the high-pressure piston rod and is communicated with the fifth round hole;

the connecting block is also provided with a pressure sensor for detecting the internal pressure of the oil-filled cavity;

and an air filter and a liquid supplementing oil port are arranged at the top end of the liquid supplementing oil tank.

Preferably, when the material rack is short of materials, the three-color lamp arranged on the equipment flickers to prompt manual feeding.

Preferably, the cut stub bar is transferred into a punching device by a first robot to be punched, and the punching device includes:

a space coordinate system is established in advance, and a first position coordinate at a cutting position, a second position coordinate at a processing position on a stamping device and a third position coordinate at a standby position of a first manipulator are obtained in the space coordinate system;

the position coordinate to be clamped is obtained by displacing a first distance along the normal direction of the cutting position based on the first position information;

controlling the first manipulator to move from the third position to the position to be clamped according to the third position coordinate and the position coordinate to be clamped;

acquiring stub bar size information at a cutting position through an acquisition module arranged on a first manipulator;

the first manipulator adjusts the clamping posture according to the size information of the stub bar, moves a second distance from the position to be clamped to the direction of the first position along the normal direction of the cutting position, clamps the stub bar and simultaneously obtains the coordinates of the clamping position;

displacing a third distance along the normal direction of the machining position according to the second position coordinate to obtain a position coordinate to be placed;

controlling a first manipulator to move the stub bar from the clamping position to the position to be placed according to the coordinates of the clamping position and the position to be placed, and the position of the stub bar is positioned by a positioning module arranged on the stamping device to obtain the offset and the distance A between the stub bar and the processing position, meanwhile, the acquisition module acquires a distance B between the stub bar and the processing position, acquires a first error value between the distance A and the third distance and a second error value between the distance B and the third distance, and if the difference value between the first error value and the second error value is larger than the difference threshold value, then the positioning information of the stub bar is obtained again through the positioning module and the obtaining module, if the difference value between the first error value and the second error value is less than the difference threshold value, and controlling the first manipulator to place the stub bar through the distance A, the offset and the size information of the stub bar.

The invention also provides integrated equipment for the high-speed punch forming process of the pipe joint, which comprises the following steps: a material rack, a feeding device, a heating device, a feeding device, a length fixing device, a cutting device, a stamping device, a blank collecting box, an electric control system and a hydraulic system,

the material rack is used for storing bars to be processed;

the feeding device is used for automatically conveying the bars on the material rack to the heating device;

the heating device is used for heating the bar stock in a grading manner;

the feeding device is used for conveying the heated bar stock to a cutting position;

the length control device is used for controlling the length of the bar stock at the cutting position;

the cutting device is used for cutting off the bar stock with the fixed length to obtain a cut stub bar;

the stamping device is used for stamping the stub bar conveyed by the first manipulator to obtain a pipe joint blank;

the blank collecting box is used for collecting pipe joint blanks conveyed by the second manipulator;

the hydraulic system is used for controlling the stamping device to perform stamping work;

and the electric control system is used for automatically controlling the integral work of the integrated equipment.

Compared with the prior art, the invention at least comprises the following beneficial effects:

the high-speed punch forming process for the pipe joint and the integrated equipment thereof are different from the traditional pipe joint blank forming process in that the whole forming process is automatically completed, and 5 procedures of cutting off and blanking by a traditional sawing machine, grinding and removing burrs by vibration, heating by an independent smelting furnace, punching and forming, deburring by blank burrs and the like are integrated into a whole machine; the production space is saved: the traditional 5 processes are integrated into one device, so that the space is saved by more than 2 times; energy conservation: the graded non-contact heating is adopted, the bar is uniformly heated, and the bar has better ductility during punch forming, so that the energy is saved by more than 50%; cutting and non-cutting: punching, shearing and cutting off the bar stock in a molten state without cutting chips; the heating temperature, the bar conveying speed, the mold locking force, the side punching pressure and the stroke of the invention can be preset, and the formed blank can be ensured to have no flash; the time for replacing the die is short, and is shortened from 2 hours for replacing the die of the traditional punching machine to 20 minutes; the traditional punching production line at least needs 3 persons to complete the operation of 5 stations, and the integrated equipment can realize that 1 person operates 3 pieces of equipment; the integrated equipment does not need to be specially installed, only needs to be placed on a common floor for leveling, and a traditional punching machine needs to preset foundation bolts; the punching machine has no vibration, the noise can be controlled below 80 decibels, and the noise of the traditional punching machine is controlled above 90 decibels.

Other advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of an integrated device for high-speed stamping forming process of a pipe joint according to the present invention in a front view;

FIG. 2 is a schematic structural diagram of the integrated equipment for the high-speed punch forming process of the pipe joint in the invention from the top view;

FIG. 3 is a left side view structural schematic diagram of the integrated equipment for the high-speed punch forming process of the pipe joint according to the invention;

FIG. 4 is an enlarged schematic view of a portion of the integrated apparatus for high-speed press forming process of pipe joints according to the present invention shown in FIG. 2;

FIG. 5 is a schematic structural diagram of a stamping device in the integrated equipment for the high-speed stamping forming process of the pipe joint according to the invention;

FIG. 6 is an enlarged schematic view of a portion of FIG. 5 of the integrated apparatus for high-speed press forming process of pipe joints according to the present invention;

FIG. 7 is a schematic structural diagram of a demoulding mechanism in the integrated equipment for the high-speed punch forming process of the pipe joint, which is disclosed by the invention;

FIG. 8 is a schematic structural diagram of a driving mechanism in the integrated equipment for the high-speed punch forming process of the pipe joint according to the invention;

fig. 9 is a partially enlarged schematic structural view of fig. 8 in the integrated equipment for the high-speed stamping forming process of the pipe joint according to the present invention.

Detailed Description

The present invention is further described in detail below with reference to the drawings and examples so that those skilled in the art can practice the invention with reference to the description.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

As shown in fig. 1 to 9, the present invention provides a high-speed press forming process for a pipe joint, including: the feeding device 1 automatically conveys the bar materials on the material rack to the heating device 2; the bar stock is heated in a multistage way in the heating device 2 in a stage heating way; after the heating temperature of the bar reaches the final preset temperature, the bar is automatically conveyed to a cutting position through the feeding device 3; controlling the fixed length at the cutting position through a fixed length device 4 and cutting the bar stock through a cutting device 5 to obtain a cut stub bar; the cut stub bar is conveyed into a stamping device 6 by a first manipulator for stamping to obtain a pipe joint blank, and the pipe joint blank is conveyed into a blank collecting box 10 by a second manipulator.

The working principle of the technical scheme is as follows: firstly, manually arranging bar materials on a material rack, wherein at most 20 bar materials can be stored on the material rack, the bar materials have the size application range of 4-6 m in length and phi 25-50 mm in diameter, and then automatically conveying the bar materials to a heating device 2 through a material separating and blocking mechanism and a material shifting mechanism of a feeding device 1, wherein the material separating and blocking mechanism and the material shifting mechanism can convey one bar material to the heating device 2 at a time; the bar stock is heated in the heating device 2 in a grading way, after the heating temperature reaches the preset temperature, the bar stock is automatically conveyed to a cutting position through the feeding device 3, the fixed-length cutting of the bar stock is carried out by a fixed-length device 4 and a cutting device 5, the fixed-length device 4 is driven by a servo motor, the cutting device 5 is cut by a hydraulic hand hay cutter, then the cut stub bar is sent to a stamping device 6 for stamping by a first manipulator, the time from cutting to the whole process of sending into the stamping device 6 is less than or equal to 2 seconds, then a punching device 6 carries out high-speed downward die assembly, adopts a composite oil cylinder to carry out oil filling, switches high-pressure oil to carry out die locking, then carries out lateral punching on a stub bar, the punching device 6 can punch straight-through and three-way pipe joint blanks, and after punching is finished, the pipe joint blanks are conveyed to the blank collecting box 10 by the second mechanical arm to be collected;

the rated clamping force of the punching device 6 is 300T, the maximum mass of the blank produced by gram is 500g, the highest production rate of the device is 1800 pieces/hour, and the application range of the integrated device comprises but is not limited to: a gas line pipe joint and fittings thereof, a hydraulic pipe joint and fittings thereof; refrigerant pipe joint and fittings thereof.

The beneficial effects of the above technical scheme are that: the difference with the traditional pipe joint blank forming process is that the whole forming process is automatically completed, and 5 processes of cutting off and blanking, vibration grinding to remove blank flying, heating in an independent smelting furnace, stamping and forming, blank flashing and deburring and the like of a traditional sawing machine are integrated into a whole machine; the production space is saved: the traditional 5 processes are integrated into one device, so that the space is saved by more than 2 times; energy conservation: the graded non-contact heating is adopted, the bar is uniformly heated, and the bar has better ductility during punch forming, so that the energy is saved by more than 50%; cutting and non-cutting: punching, shearing and cutting off the bar stock in a molten state without cutting chips; the heating temperature, the bar conveying speed, the mold locking force, the side punching pressure and the stroke of the invention can be preset, and the formed blank can be ensured to have no flash; the time for replacing the die is short, and is shortened from 2 hours for replacing the die of the traditional punching machine to 20 minutes; the traditional punching production line at least needs 3 persons to complete the operation of 5 stations, and the integrated equipment can realize that 1 person operates 3 pieces of equipment; the integrated equipment does not need to be specially installed, and only needs to be placed on a common floor to be leveled, and the traditional punching machine needs to be preset with foundation bolts; the punching machine has no vibration, the noise can be controlled below 80 decibels, and the noise of the punching machine can be controlled above 90 decibels.

In one embodiment, the heating device 2 adopts a gas heating mode, eight-stage heating is set at most, and the final preset temperature is 650 +/-13 ℃;

each stage of heating of the heating device 2 is provided with a temperature control sensor for monitoring temperature, the heating temperature of each stage is fed back to a heating control system of the equipment through the temperature control sensor, the heating temperature of each stage is controlled through the heating control system, and the graded stage number and the heating temperature of each stage are preset and displayed on a human-computer interface.

The working principle and the beneficial effects of the technical scheme are as follows: the heating device 2 adopts gas as energy for heating, is more energy-saving and environment-friendly, adopts a non-contact heating mode in the heating device 2, can accommodate 6m long bars, adopts a graded heating mode, is provided with a temperature control sensor for monitoring and feeding back the heating temperature of each grade, controls the heating temperature through a heating control system, realizes closed-loop control, can preset and display the heating temperature and the grade on a human-computer interface, and finally sets the temperature to be 650 +/-13 ℃; make the bulk heating to the bar more even to compare with traditional heating methods, heating device 2 is energy-conserving more than 50%, when follow-up carries out stamping forming to the stub bar, the stub bar can have better ductility, promotes yield and product quality.

In one embodiment, the stamping device 6 comprises: the stamping die comprises a base 610, wherein a lower die core 620 is arranged on the base 610, two opposite sides of the lower die core 620 are respectively provided with a transverse stamping mechanism 630, the base 610 is also provided with at least two guide posts 640, the guide posts 640 are provided with a moving mechanism 7 in a sliding manner, the moving mechanism 7 is controlled to slide by a driving mechanism 8 fixedly arranged at the tops of the guide posts 640, and the bottom of the moving mechanism 7 is provided with an upper die core 650 corresponding to the lower die core 620;

when the cut stub bar is conveyed to the lower mold core 620, the driving mechanism 8 controls the moving mechanism 7 to move downward, so that the upper mold core 650 and the lower mold core 620 are clamped and locked, and then the cut stub bar is subjected to press forming by the transverse press mechanism 630.

The working principle and the beneficial effects of the technical scheme are as follows: the transverse punching mechanism 630 and the driving mechanism 8 are driven in a hydraulic mode and controlled to work through a hydraulic system 14; install lower mold core 620 on base 610, place back on stamping device 6 at the stub bar, move down at a high speed along guide post 640 through 8 drive moving mechanism 7 of actuating mechanism, make and go up mold core 650 and mold core 620 and carry out the compound die down, then actuating mechanism 8 switches high-pressure oil circuit and carries out the mode locking to last mold core 650 and lower mold core 620, reach the mode locking dynamics, make the stable fixing of stub bar between last mold core 650 and lower mold core 620, then horizontal punching press mechanism 630 divide into left drift and right drift, can punch the both ends of stub bar simultaneously respectively, whole punching press process is efficient, and the mode locking dynamics, side punching pressure and punching press stroke all can preset, avoid producing the overlap.

In one embodiment, the moving mechanism 7 includes an upper moving block 710 and a lower moving block 720 slidably disposed on the guide post 640, a top of the upper moving block 710 is connected to the driving mechanism 8, a bottom of the upper moving block 710 is connected to a top of the lower moving block 720 by a fixing post, and an upper mold core 650 is fixedly disposed at a bottom of the lower moving block 720.

The working principle and the beneficial effects of the technical scheme are as follows: the upper moving block 710 and the lower moving block 720 are slidably disposed on the guide post 640, so that the movement of the moving mechanism 7 is more stable, and better supporting force can be provided for the upper mold core 650.

In one embodiment, the lower moving block 720 is further provided with a demolding mechanism 9, the demolding mechanism 9 includes a driving portion 910, the driving portion 910 is fixedly disposed at the top of the lower moving block 720, the lower moving block 720 is provided with a first circular hole, a driving column 920 is disposed in the first circular hole, the driving column 920 is connected with an output end of the driving portion 910, and the driving portion 910 provides power for the driving portion to move up and down in the first circular hole;

a second round hole communicated with the first round hole is formed in the top end of the upper mold core 650, a third round hole is formed below the second round hole, a fourth round hole is formed below the third round hole, the diameter of the second round hole is larger than that of the third round hole, and the diameter of the third round hole is larger than that of the fourth round hole;

a push rod 930 is arranged in the third round hole, the top end of the push rod 930 extends upwards into the second round hole, the top end of the push rod 930 is used for abutting against the driving column 920, the bottom end of the push rod 930 can be extended out from the bottom surface of the upper die core 650, a limiting ring 931 is arranged on the part, located in the third round hole, of the push rod 930, a limiting sleeve ring 940 used for limiting the limiting ring 931 to move upwards is arranged on the top end, located in the third round hole, of the second round hole, and a spring 950 is arranged between the bottom surface of the limiting ring 931 and the top end of the fourth round hole.

The working principle and the beneficial effects of the technical scheme are as follows: when the spring 950 is not subjected to an external force, the bottom end of the push rod 930 is kept consistent with the bottom surface of the upper mold core 650, that is, the shape of the final pipe joint blank is not affected; after the punch forming, the outer surface of the stub bar is contacted with the upper die core and the lower die core more tightly, in order to prevent the pipe joint blank from being adhered to the upper die core 650, after the punch forming, the driving part 910 drives the driving post 920 to move downwards to be inserted into the second round hole, and pushes the push rod 930 downwards in the second round hole, the spring 950 is compressed, the push rod 930 moves downwards, the bottom end of the push rod 930 slowly pushes the formed pipe joint blank, the bottom end of the push rod 930 pushes the pipe joint blank along with the upward movement of the upper die core 650, so that the pipe joint blank is separated from the upper die core 650 for demolding, after the two are completely separated, the driving post 920 is driven upwards again by the driving part 910 in the reverse direction, so that the top ends of the driving post 920 and the push rod 930 are separated, under the elastic restoring force of the spring 950, the limiting ring 931 on the push rod 930 is abutted to the limiting ring 940, so that the bottom end of the push rod 930 is restored to the initial position, is convenient for next demoulding.

In one embodiment, the drive mechanism 8 comprises: the connecting seat 810 is fixedly connected with the guide column 640, the top end of the connecting seat 810 is fixedly connected with a connecting cylinder 820, the top end of the connecting cylinder 820 is fixedly connected with a connecting block 830, and the top of the connecting block 830 is provided with a liquid supplementing oil tank 840;

a high-pressure piston rod 850 is arranged in the middle of the connecting block 830, a mold locking piston rod 860 is slidably arranged inside the connecting cylinder 820, the bottom end of the mold locking piston rod 860 penetrates through the connecting seat 810 and is fixedly connected with the upper moving block 710, a fifth round hole into which the bottom end of the high-pressure piston rod 850 is inserted is formed in the top end of the mold locking piston rod 860, a stepped hole for installing a first sealing ring 870 is formed in the top end of the fifth round hole, and the inner side and the outer side of the first sealing ring 870 are respectively connected with the high-pressure piston rod 850 and the mold locking piston rod 860 in a sealing manner;

the outer side of the mode locking piston rod 860 close to the top end thereof is in sealed sliding connection with the connecting cylinder 820, a second sealing ring 880 is fixedly arranged at an opening at the bottom end of the connecting seat 810 in a sealed manner, the inner side of the second sealing ring 880 is in sealed sliding connection with the mode locking piston rod 860, and a cavity formed by the top surface of the mode locking piston rod 860 and the bottom surface of the connecting block 830 is an oil-filled cavity 890;

a pressure maintaining oil filling port 11 and a high pressure oil filling port 12 are arranged on the side surface of the connecting block 830, a pressure maintaining oil path 831 communicated with the pressure maintaining oil filling port 11 and a high pressure oil path 832 communicated with the high pressure oil filling port 12 are arranged inside the connecting block 830, and the pressure maintaining oil path 831 is communicated with the oil filling cavity 890;

an annular oil path 851 communicated with a high-pressure oil path 832 is arranged on the outer circumference of the part, located on the connecting block 830, of the high-pressure piston rod 850, a radial oil path 852 communicated with the annular oil path 851 is arranged inside the high-pressure piston rod 850, an axial oil path 853 is communicated below the radial oil path 852, and the axial oil path 853 penetrates through the bottom end of the high-pressure piston rod 850 and is communicated with the fifth round hole;

the connecting block 830 is also provided with a pressure sensor 13 for detecting the internal pressure of the oil-filled cavity 890;

the top end of the liquid supplementing oil tank 840 is provided with an air filter 841 and a liquid supplementing oil port 842.

The working principle and the beneficial effects of the technical scheme are as follows: the liquid supplementing oil tank 840 is connected with the pressure maintaining oil filling port 11 and the high pressure oil filling port 12 through the hydraulic system 14, the liquid supplementing oil tank 840 can be controlled to switch the oil filling ports, the diameter of the pressure maintaining oil path 831 is larger than that of the high pressure oil path 832, in the mold closing process, oil in the liquid supplementing oil tank 840 is quickly filled into the pressure maintaining oil path 831 through the hydraulic system 14 and quickly filled into the oil filling cavity 890, the pressure of the oil filling cavity 890 is increased to downwards push the mold locking piston rod 860, the mold locking piston rod 860 is quickly pushed downwards to drive the moving mechanism 7 and the upper mold core 650 to move downwards at a high speed, the upper mold core 650 and the lower mold core 620 are quickly closed, but the pushing force acting on the mold locking piston rod 860 is insufficient to provide mold locking force, so that the oil paths are switched at the moment, the liquid supplementing oil tank 840 fills high pressure oil into the high pressure oil path 832 through the hydraulic system 14, and the liquid oil passes through the annular oil path 851 in sequence, and the annular oil path 851 is controlled to switch the oil filling ports, The radial oil path 852 and the axial oil path 853 increase the filling pressure of the liquid oil due to the small inner diameters of the oil paths, so that the liquid oil filled from the axial oil path 853 acts on the mold locking piston rod 860 and pushes downward, and simultaneously, the liquid oil filling tank 840 is controlled to fill the liquid oil into the oil filling cavity 890 according to the hydraulic pressure of the oil filling cavity 890 detected by the pressure sensor 13, so that the pressure maintaining effect is realized, the downward pushing force of the mold locking piston rod 860 is increased, and the upper mold core 650 and the lower mold core 620 are locked under the preset mold locking force.

In one embodiment, when the material rack is lack of materials, a three-color lamp arranged on the equipment flickers to prompt manual feeding.

The working principle and the beneficial effects of the technical scheme are as follows: the material rack is provided with a detector for detecting the number of the bars, the material rack is provided with at most 20 bars, when only one bar on the material rack remains, the detector transmits information to the electric control system 15, the electric control system 15 controls the tricolor lamp to flash, and manual feeding is prompted.

In one embodiment, the cut stub bar is transported into the punching device 6 by a first robot arm for punching, and the method comprises the following steps:

a space coordinate system is established in advance, and a first position coordinate at a cutting position, a second position coordinate at a processing position on the stamping device 6 and a third position coordinate at a standby position of the first manipulator are obtained in the space coordinate system;

controlling a first manipulator to move the stub bar from the clamping position to the position to be placed according to the coordinates of the clamping position and the position to be placed, and the position of the stub bar is positioned by a positioning module arranged on the stamping device 6 to obtain the offset and the distance A between the stub bar and the processing position, meanwhile, the acquisition module acquires a distance B between the stub bar and the processing position, acquires a first error value between the distance A and the third distance and a second error value between the distance B and the third distance, and if the difference value between the first error value and the second error value is larger than the difference threshold value, then the positioning information of the stub bar is obtained again through the positioning module and the obtaining module, if the difference value between the first error value and the second error value is less than the difference threshold value, controlling the first manipulator to place the stub bar according to the distance A, the offset and the size information of the stub bar;

through the acquisition module that sets up on first manipulator, acquire the stub bar size of cutting off position department, include:

the acquisition module adopts a laser sensor to emit laser to the position of the stub bar from the visual angle of the position to be clamped, and establishes a sensor coordinate system by taking the laser sensor as an origin to acquire coordinates of four vertexes of an outer frame of the stub bar in the sensor coordinate system, wherein the four vertexes are respectively an upper left vertex (x vertex) ₁ ,y ₁ ,z ₁ ) Left lower vertex (x) ₂ ,y ₂ ,z ₂ ) Top right vertex (x) ₃ ,y ₃ ,z ₃ ) Lower right vertex (x) ₄ ,y ₄ ,z ₄ ) The size information of the stub bar can be obtained, including the length of the stub bar, the diameter of the stub bar and the midpoint coordinate of the stub bar,

wherein, L is the length of the stub bar, and D is the diameter of the stub bar;

the midpoint coordinate (x) of the stub bar _c ,y _c ,z _c ) Is composed of

Converting the midpoint coordinate of the stub bar in a sensor coordinate system into a midpoint coordinate in a space coordinate system, adjusting the clamping posture of the first manipulator according to the obtained size of the stub bar, determining a second distance, and clamping the stub bar;

the placing position of the stub bar is adjusted through the first manipulator according to the positioning information of the stub bar, and the stub bar is placed at the processing position.

The working principle and the beneficial effects of the technical scheme are as follows: the first position coordinate of the cutting position is the center coordinate of a plane of a stub bar placed at the cutting position, the normal direction of the cutting position refers to the perpendicular direction perpendicular to the plane of the stub bar placed at the cutting position, the position coordinate to be clamped and arranged at a first distance in the perpendicular direction is preset, the third position coordinate of the standby position of the first manipulator is the position coordinate of the clamping center of the first manipulator when the first manipulator does not work, the first manipulator is controlled to move from the third position to the position to be clamped according to the third position coordinate and the position coordinate to be clamped, the size of the stub bar needs to be acquired at the moment, the distance of the movement of the clamping center of the first manipulator can be controlled, and the first manipulator is located above the stub bar at the moment, so that the stub bar can be detected through the acquisition module arranged on the first manipulator, the size of the stub bar is acquired, and the outermost side frame information of the stub bar is acquired from the top, in terms of vision, the stub bar is overlooked from the top to be rectangular, so that the acquisition module is adopted to acquire four vertex coordinates of the rectangle of the stub bar, the size of the rectangle can be acquired through calculation, the length and the diameter of the stub bar can be acquired through calculation according to the formula, the clamping posture of the first manipulator can be adjusted according to the length and the diameter of the stub bar and the position information of the stub bar, then the coordinate of the central point of the stub bar can be acquired according to the coordinates of the four vertices, the clamping center of the first manipulator is coincident with the coordinate of the central point, the clamping position coordinate of the first manipulator is the coordinate of the central point of the stub bar, the acquisition module adopts a laser sensor to perform size positioning on the stub bar, and the acquired coordinate information of the stub bar in a sensor coordinate system is converted into coordinate information in a space coordinate system; the second position coordinate of the processing position on the stamping device 6 is the middle position coordinate of the lowest position of the lower die core 620, the lower die core 620 is in a semi-circular arc shape, the coordinate of the position to be placed is the same as the coordinate of the position to be clamped, the first manipulator moves from the clamping position to the position to be placed, at the moment, in order to ensure the accuracy of the position to be placed, the position to be placed of the stub bar is positioned through the positioning module, the clamping center of the first manipulator, namely the distance between the center of the stub bar and the processing position is accurate, and meanwhile, the position to be placed of the stub bar can be ensured not to deviate; the positioning module adopts a visual detection principle, the acquisition module adopts a laser detection principle, the positioning module and the acquisition module are combined to jointly position the placing position of the stub bar, the detection result of the positioning module can be verified through the acquisition module, so that the positioning accuracy is ensured, the follow-up stamping forming of the stub bar can be ensured to be more accurate, and the problem of stamping caused by the offset of the position is prevented.

The invention also provides integrated equipment for the high-speed punch forming process of the pipe joint, which comprises the following steps: a material rack, a feeding device 1, a heating device 2, a feeding device 3, a length fixing device 4, a cutting device 5, a stamping device 6, a blank collecting box 10, an electric control system 15 and a hydraulic system 14,

the material rack is used for storing bars to be processed;

the feeding device 1 is used for automatically conveying the bar stock on the material rack to the heating device 2;

the heating device 2 is used for heating the bar stock in a grading way;

the feeding device 3 is used for conveying the heated bar stock to a cutting position;

the length control device 4 is used for controlling the length of the bar stock at the cutting position;

the cutting device 5 is used for cutting the bar stock with the fixed length to obtain a cut stub bar;

the stamping device 6 is used for stamping the stub bar conveyed by the first manipulator to obtain a pipe joint blank;

the blank collecting box 10 is used for collecting pipe joint blanks conveyed by the second manipulator;

the hydraulic system 14 is used for controlling the stamping device 6 to perform stamping work;

the electric control system 15 is used for automatically controlling the whole work of the integrated equipment.

The working principle and the beneficial effects of the technical scheme are as follows: the integrated equipment has the advantages that 5 processes of cutting off and blanking, vibrating grinding to remove burr fly, heating in an independent smelting furnace, stamping and forming, deburring of blank flash and the like of the traditional sawing machine are integrated into a whole machine; the production space is saved: the traditional 5 processes are integrated into one device, so that the space is saved by more than 2 times; energy conservation: the graded non-contact heating is adopted, the bar is uniformly heated, and the bar has better ductility during punch forming, so that the energy is saved by more than 50%; cutting and non-cutting: punching and shearing the bar stock in a molten state to cut off the bar stock without cutting chips; the heating temperature, the bar conveying speed, the mold locking force, the side punching pressure and the stroke of the invention can be preset, and the formed blank can be ensured to have no flash; the time for replacing the die is short, and is shortened from 2 hours for replacing the die of the traditional punching machine to 20 minutes; the traditional punching production line at least needs 3 persons to complete the operation of 5 stations, and the integrated equipment can realize that 1 person operates 3 pieces of equipment; the integrated equipment does not need to be specially installed, only needs to be placed on a common floor for leveling, and a traditional punching machine needs to preset foundation bolts; the punching machine has no vibration, the noise can be controlled below 80 decibels, and the noise of the punching machine can be controlled above 90 decibels.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

While embodiments of the invention have been disclosed above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims

1. A high-speed stamping forming process for a pipe joint is characterized by comprising the following steps: the feeding device (1) automatically conveys the bar materials on the material rack to the heating device (2); the bar stock is heated in a heating device (2) in a multistage way by adopting a staged heating mode; after the heating temperature of the bar reaches the final preset temperature, the bar is automatically conveyed to a cutting position through a feeding device (3); controlling the fixed length at the cutting position through a fixed length device (4) and cutting the bar stock through a cutting device (5) to obtain a cut stub bar; and conveying the cut stub bar into a stamping device (6) through a first manipulator for stamping to obtain a pipe joint blank, and conveying the pipe joint blank into a blank collecting box (10) through a second manipulator.

2. The high-speed stamping forming process for pipe joints according to claim 1, wherein the heating device (2) adopts a gas heating mode and is provided with eight-stage heating at most, and the final preset temperature is 650 ℃ ± 13 ℃.

3. The high-speed stamping forming process for pipe joints as claimed in claim 1, wherein each stage of heating of the heating device (2) is provided with a temperature control sensor for monitoring temperature, the heating temperature of each stage is fed back to a heating control system of the equipment through the temperature control sensor, the heating temperature of each stage is controlled through the heating control system, and the stage number of the stage and the heating temperature of each stage are preset and displayed on a human-computer interface.

4. The high-speed stamping forming process for pipe joints according to claim 1, wherein the stamping device (6) comprises: the stamping die comprises a base (610), wherein a lower die core (620) is arranged on the base (610), two opposite sides of the lower die core (620) are respectively provided with a transverse stamping mechanism (630), the base (610) is also provided with at least two guide columns (640), the guide columns (640) are provided with a moving mechanism (7) in a sliding manner, the moving mechanism (7) is controlled to slide by a driving mechanism (8) fixedly arranged at the tops of the guide columns (640), and the bottom of the moving mechanism (7) is provided with an upper die core (650) corresponding to the lower die core (620);

when the cut stub bar is conveyed to the lower mold core (620), the driving mechanism (8) controls the moving mechanism (7) to move downwards, so that the upper mold core (650) and the lower mold core (620) are matched and locked, and then the cut stub bar is subjected to punch forming through the transverse punching mechanism (630).

5. The high-speed stamping forming process for the pipe joint according to claim 4, wherein the moving mechanism (7) comprises an upper moving block (710) and a lower moving block (720) which are slidably arranged on the guide post (640), the top of the upper moving block (710) is connected with the driving mechanism (8), the bottom of the upper moving block (710) is connected with the top of the lower moving block (720) through a fixed post, and the bottom of the lower moving block (720) is fixedly provided with an upper mold core (650).

6. The high-speed punch forming process for the pipe joint according to claim 5, wherein the lower moving block (720) is further provided with a demolding mechanism (9), the demolding mechanism (9) comprises a driving portion (910), the driving portion (910) is fixedly arranged at the top of the lower moving block (720), the lower moving block (720) is provided with a first round hole, a driving column (920) is arranged in the first round hole, the driving column (920) is connected with the output end of the driving portion (910), and power for the driving portion (910) to move up and down in the first round hole is provided;

a second round hole communicated with the first round hole is formed in the top end of the upper mold core (650), a third round hole is formed below the second round hole, a fourth round hole is formed below the third round hole, the diameter of the second round hole is larger than that of the third round hole, and the diameter of the third round hole is larger than that of the fourth round hole;

be equipped with push rod (930) in the third round hole, the top of push rod (930) upwards extends to in the second round hole, the top of push rod (930) be used for with drive column (920) butt, the bottom of push rod (930) can stretch out by the bottom surface of last mould core (650), the part that push rod (930) are located the third round hole is equipped with spacing ring (931), the top that just is located the third round hole in the second round hole is equipped with spacing lantern ring (940) that are used for restricting spacing ring (931) rebound, the bottom surface of spacing ring (931) with be equipped with spring (950) between the top of fourth round hole.

7. The high-speed stamping forming process for pipe joints according to claim 5, wherein the driving mechanism (8) comprises: the connecting base (810) is fixedly connected with the guide column (640), the top end of the connecting base (810) is fixedly connected with a connecting cylinder (820), the top end of the connecting cylinder (820) is fixedly connected with a connecting block (830), and the top of the connecting block (830) is provided with a liquid supplementing oil tank (840);

the middle part of the connecting block (830) is provided with a high-pressure piston rod (850), the inside of the connecting cylinder (820) is provided with a mold locking piston rod (860) in a sliding manner, the bottom end of the mold locking piston rod (860) penetrates through the connecting seat (810) and is fixedly connected with the upper moving block (710), the top end of the mold locking piston rod (860) is provided with a fifth round hole into which the bottom end of the high-pressure piston rod (850) is inserted, the top end of the fifth round hole is provided with a stepped hole for installing a first sealing ring (870), and the inner side and the outer side of the first sealing ring (870) are respectively connected with the high-pressure piston rod (850) and the mold locking piston rod (860) in a sealing manner;

the outer side, close to the top end, of the mode locking piston rod (860) is in sealed sliding connection with the connecting cylinder (820), a second sealing ring (880) is fixedly arranged at an opening at the bottom end of the connecting seat (810) in a sealed mode, the inner side of the second sealing ring (880) is in sealed sliding connection with the mode locking piston rod (860), and a cavity formed by the top surface of the mode locking piston rod (860) and the bottom surface of the connecting block (830) is an oil filling cavity (890);

a pressure maintaining oil filling port (11) and a high-pressure oil filling port (12) are arranged on the side surface of the connecting block (830), a pressure maintaining oil path (831) communicated with the pressure maintaining oil filling port (11) and a high-pressure oil path (832) communicated with the high-pressure oil filling port (12) are arranged inside the connecting block (830), and the pressure maintaining oil path (831) is communicated with the oil filling cavity (890);

an annular oil way (851) communicated with a high-pressure oil way (832) is arranged on the outer side of the high-pressure piston rod (850) in a circle at the part located on the connecting block (830), a radial oil way (852) communicated with the annular oil way (851) is arranged inside the high-pressure piston rod (850), an axial oil way (853) is communicated below the radial oil way (852), and the axial oil way (853) penetrates through the bottom end of the high-pressure piston rod (850) and is communicated with the fifth round hole;

the connecting block (830) is also provided with a pressure sensor (13) for detecting the internal pressure of the oil-filled cavity (890);

and an air filter (841) and a liquid supplementing oil port (842) are arranged at the top end of the liquid supplementing oil tank (840).

8. The high-speed punch forming process for the pipe joint according to claim 1, wherein when the material rest is short of material, a three-color lamp arranged on equipment flickers to prompt manual feeding.

9. The high-speed stamping forming process for pipe joints according to claim 1, wherein the cut stub bar is conveyed into a stamping device (6) by a first manipulator for stamping, and the process comprises the following steps:

a space coordinate system is established in advance, and a first position coordinate at a cutting position, a second position coordinate at a processing position on a stamping device (6) and a third position coordinate at a standby position of a first manipulator are obtained in the space coordinate system;

controlling a first manipulator to move the stub bar from the clamping position to the position to be placed according to the coordinates of the clamping position and the position to be placed, and the position of the stub bar is positioned by a positioning module arranged on the stamping device (6) to obtain the offset and the distance A between the stub bar and the processing position, meanwhile, the acquisition module acquires a distance B between the stub bar and the processing position, acquires a first error value between the distance A and the third distance and a second error value between the distance B and the third distance, and if the difference value between the first error value and the second error value is larger than the difference threshold value, then the positioning information of the stub bar is obtained again through the positioning module and the obtaining module, if the difference value between the first error value and the second error value is less than the difference threshold value, and controlling the first manipulator to place the stub bar through the distance A, the offset and the size information of the stub bar.

10. The integrated apparatus for the high-speed press forming process of the pipe joint according to any one of claims 1 to 9, comprising: a material rack, a feeding device (1), a heating device (2), a feeding device (3), a length fixing device (4), a cutting device (5), a stamping device (6), a blank collecting box (10), an electric control system (15) and a hydraulic system (14),

the material rack is used for storing bars to be processed;

the feeding device (1) is used for automatically conveying the bar materials on the material rack to the heating device (2);

the heating device (2) is used for heating the bar stock in a grading manner;

the feeding device (3) is used for conveying the heated bar stock to a cutting position;

the length control device (4) is used for controlling the length of the bar stock at the cutting position;

the cutting device (5) is used for cutting the bar stock with the fixed length to obtain a cut stub bar;

the stamping device (6) is used for stamping the stub bar conveyed by the first manipulator to obtain a pipe joint blank;

the blank collecting box (10) is used for collecting pipe joint blanks conveyed by the second manipulator;

the hydraulic system (14) is used for controlling the stamping device (6) to perform stamping work;

and the electric control system (15) is used for automatically controlling the integral work of the integrated equipment.