CN109926481B - Automatic corrugated pipe forming device and method - Google Patents
Automatic corrugated pipe forming device and method Download PDFInfo
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- CN109926481B CN109926481B CN201910182275.4A CN201910182275A CN109926481B CN 109926481 B CN109926481 B CN 109926481B CN 201910182275 A CN201910182275 A CN 201910182275A CN 109926481 B CN109926481 B CN 109926481B
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Abstract
The invention relates to an automatic corrugated pipe forming device and a method thereof, wherein the automatic corrugated pipe forming device comprises an expansion device for forming corrugations, the expansion device comprises a die forming mechanism and a conical loading pressure head arranged at the center of the die forming mechanism, the die forming mechanism comprises a pressing plate, an upper expansion template, a clamping plate, a lower expansion template and a backing plate which are stacked from top to bottom, the upper expansion template and the lower expansion template are both composed of a plurality of fan-ring die units distributed in an annular array, the inner end of each die unit is provided with a sliding block, the outer wall of the conical loading pressure head is provided with a sliding chute arranged along the axial direction, and the sliding block is embedded in the sliding chute; the invention mutually compensates the waveform breakpoints through the design of the two bulging templates, does not need the rotation of the template, has simpler mechanism and more stability, greatly improves the working efficiency and is worth popularizing.
Description
Technical Field
The invention belongs to the technical field of corrugated pipe forming, and particularly relates to an automatic corrugated pipe forming device.
Background
The hydraulic processing of metal corrugated pipe is a common technological method for forming annular corrugated pipes with circular, elliptical, rectangular and racetrack-shaped cross sections. After the relative positions of the die and the pipe blank are adjusted, the inner cavity of the pipe blank is pressurized and then is mechanically compressed along the axial direction, and a corrugated pipe with a given length is formed quickly. This is a method of hydroforming, called a multiple wave one shot method. The bellows generally used as an elastic element is mostly processed by the method. However, this method is not applicable to a corrugated tube as a metal hose body. As such bellows are required to be longer as well. For this reason, another hydroforming method, i.e., a single-wave continuous forming method, has been developed. It can continuously form dozens, hundreds, even thousands or tens of thousands of corrugations under the condition that the length condition of the pipe blank allows. When in use, the rubber can be cut according to the required length or the required number of ripples. In this sense, it can replace a multi-wave one-shot forming machine. Corrugated pipes with different specifications can be produced as long as the moulds with different specifications are replaced. The single-wave continuous forming machine tool is multifunctional equipment for machining corrugated pipes, and is key equipment on the production line.
In the prior art, the single-wave continuous forming machine for the metal corrugated pipe is used for extruding and expanding a waveform with a breakpoint and then rotating a die at a certain angle to extrude and expand again to complete the processing of a complete waveform, so that the die and a loading oil cylinder need to perform rotary motion, the mechanism is complex, and the stability of the die is poor due to the structure.
Disclosure of Invention
The present invention is directed to solve the above problems and to provide an automatic bellows molding apparatus which does not require a die to rotate, has a simple mechanism, requires less driving mechanisms for a rotational movement, and has a more stable fixing structure for mechanisms such as a loading cylinder.
The invention realizes the purpose through the following technical scheme:
the utility model provides a bellows automatic molding device, including the bulging device that is used for the shaping ripple, this bulging device includes die forming mechanism and locates the toper loading pressure head at die forming mechanism center, die forming mechanism is including the clamp plate of range upon range of setting from top to bottom, go up the bulging template, splint, bulging template and backing plate down, it all comprises the die unit of the fan ring that a plurality of annular array distribute to go up the bulging template and bulge template down, the inner of die unit is equipped with the slider, be equipped with the spout that sets up along the axial on the outer wall of toper loading pressure head, the slider inlays in this spout.
As a further optimization scheme of the invention, the number of the die units of the upper bulging template and the lower bulging template is the same and is N, the die units of the upper bulging template and the die units of the lower bulging template are distributed in a staggered manner, and the staggered angle is 180 degrees/N.
As a further optimization scheme of the invention, the distance between the upper bulging template and the lower bulging template is a single-wavelength expansion length.
As a further optimization scheme of the invention, the diameter of the bottom circle of the die unit of the upper bulging template is larger than that of the die unit of the lower bulging template, so that the excircles of the two bulging templates can have the same diameter after the conical loading pressure head is kept in place.
As a further optimization scheme of the invention, the cross section of the sliding block is T-shaped, and the inclination of the inner surface of the sliding block is the same as the taper of the tapered loading pressure head.
As a further optimization scheme of the invention, the pressing plate, the upper bulging template, the clamping plate, the lower bulging template and the base plate are in through connection through fixing bolts, through holes matched with the fixing bolts are formed in the pressing plate, the clamping plate and the base plate, strip-shaped holes matched with the fixing bolts are formed in the die sheet units of the upper bulging template and the lower bulging template, and the strip-shaped holes are formed along the radius of the lower bulging template; the principle is as follows: the fixing bolt provides connection for the die forming mechanism, so that the pressing plate, the clamping plate and the base plate can limit the longitudinal degree of freedom of the die unit, and the die unit cannot be limited by the fixing bolt when moving inside and outside due to the arrangement of the strip-shaped holes, and the strip-shaped holes of the upper bulging template and the lower bulging template are aligned as necessary.
As a further optimization scheme of the invention, the bottom of the die forming mechanism is arranged on a support, the bottom of the conical loading pressure head is connected with a piston rod of a loading oil cylinder, the support is directly arranged at the top of a cylinder body of the loading oil cylinder, and a through hole in clearance fit with the piston rod of the loading oil cylinder is arranged in the center of the support. The loading oil cylinder is used as forming power, and a piston rod of the loading oil cylinder is connected with a conical loading pressure head to provide lifting power for the loading oil cylinder.
As a further optimization scheme of the invention, a lifting platform is arranged on the outer side of the bulging device, a through hole in clearance fit with the loading oil cylinder is arranged in the center of the lifting platform, and the bottom of the lifting platform is connected with a lifting mechanism; the lifting mechanism comprises a lifting screw rod, a sleeve and a driving mechanism, four lifting screw rods are arranged at the bottom of the lifting platform, the lifting screw rods are inserted into the sleeve and are in threaded connection with the sleeve, and the sleeve is fixedly arranged in the base; the four lifting screw rods are all provided with synchronous chain wheels, the synchronous chain wheels of the four lifting screw rods are connected through chains, one of the lifting screw rods is also provided with a driving chain wheel, the driving chain wheel is connected with a driving mechanism through chain transmission, the driving mechanism comprises a motor, and a motor chain wheel on an output shaft of the motor is connected with the driving chain wheel through chains. The principle is as follows: the motor drives the lifting screw rods to rotate through chain transmission, the four lifting screw rods realize synchronous rotation through chain transmission, and the lifting screw rods synchronously ascend under the action of threads while rotating so as to drive the lifting platform to ascend integrally; and if necessary, the top end of the lifting screw rod is rotationally connected with the lifting platform.
The corrugated pipe forming method of the automatic corrugated pipe forming device comprises the following steps:
step one, a tube blank is placed on a lifting platform, the tube blank is clamped through a clamp, the tube blank and a conical loading pressure head are coaxial, then the lifting platform is driven to lift through a lifting mechanism, the height of a lower bulging template is consistent with the height of an initial bulging wave of the tube blank, a loading oil cylinder drives a conical loading pressure head to move downwards, a die sheet unit of the lower bulging template is pushed to move outwards, bulging is carried out on the outer tube blank, a discontinuous waveform is generated, the loading oil cylinder drives the conical loading pressure head to reset, and meanwhile, the die sheet unit of the lower bulging template resets under the action of a sliding block and a sliding groove;
driving a lifting platform to ascend through a lifting mechanism to enable the tube blank to move axially by a single-wave expansion length, wherein the height of the waveform to be processed of the lower bulging template is consistent with that of the waveform to be processed of the tube blank, and the heights of the discontinuous waveforms formed by the upper bulging template and the lower bulging template are consistent; the loading oil cylinder drives the conical loading pressure head to move downwards to push the die sheet units of the lower bulging template and the upper bulging template to move outwards, the lower bulging template bulges the external tube blank to generate a discontinuous waveform again, and the upper bulging template bulges the external tube blank to eliminate the bulge of the previous discontinuous waveform which is not extruded and expanded in place to form a complete waveform; then the loading oil cylinder drives the conical loading pressure head to reset, and meanwhile, the die piece unit of the lower bulging template resets under the action of the sliding block and the sliding groove;
and step three, driving the lifting platform to ascend through the lifting mechanism, enabling the pipe blank to move along the axial direction by a single-wave expansion length, compensating the discontinuous waveform according to the step two, and extruding and expanding the next waveform until the target waveform number is processed.
The invention has the beneficial effects that:
1) the invention compensates the waveform break points through the design of the two bulging templates, does not need the rotation of the template, has simpler mechanism, reduces the driving mechanisms required by the rotary motion and does not need to increase other driving mechanisms;
2) the fixing structures of the mechanisms such as the loading oil cylinder and the like are more stable;
3) because the invention cancels the rotary motion, the time for processing a complete waveform is the same as the time for processing extrusion expansion once originally, thereby greatly improving the working efficiency.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention in accordance with one embodiment;
FIG. 2 is an enlarged view at A of FIG. 1;
FIG. 3 is a top plan view of the upper expansion die plate of the present invention in accordance with one embodiment;
fig. 4 is a top view of the lower expansion die plate of the present invention in accordance with one embodiment.
In the figure: the device comprises a bulging device 1, a die forming mechanism 2, a conical loading pressure head 3, a pressure plate 4, an upper bulging template 5, a clamping plate 6, a lower bulging template 7, a backing plate 8, a die unit 9, a sliding block 10, a strip-shaped hole 11, a seat support 12, a loading oil cylinder 13, a lifting table 14, a lifting screw rod 15, a sleeve 16, a synchronous chain wheel 17, a driving chain wheel 18, a pipe blank 19 and a base 100.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Example one
As shown in fig. 1-4, an automatic corrugated pipe forming device comprises an expanding device 1 for forming corrugations, the expanding device 1 comprises a die forming mechanism 2 and a conical loading pressure head 3 arranged at the center of the die forming mechanism 2, the die forming mechanism 2 comprises a pressing plate 4, an upper expanding template 5, a clamping plate 6, a lower expanding template 7 and a backing plate 8 which are stacked from top to bottom, the upper expanding template 5 and the lower expanding template 7 are both composed of a plurality of fan-shaped die units 9 distributed in an annular array, the inner end of each die unit 9 is provided with a slide block 10, the outer wall of the conical loading pressure head 3 is provided with a slide groove arranged along the axial direction, and the slide block 10 is embedded in the slide groove;
as described above, the number of the die units 9 of the upper bulging template 5 and the lower bulging template 7 is the same, and is N, the angle of each die unit 9 is 360 °/N, the die units 9 of the upper bulging template 5 and the die units 9 of the lower bulging template 7 are distributed in a staggered manner, and the staggered angle is half of 360 °/N, that is, 180 °/N (it is required to ensure that the die units 9 of the upper bulging template 5 can compensate for waveform breakpoints generated by gaps after the die units 9 of the lower bulging template 7 are opened).
The distance between the upper bulging template 5 and the lower bulging template 7 is a single-wave expansion length.
The diameter of the base circle of the die units 9 of the upper bulging template 5 is larger than that of the die units 9 of the lower bulging template 7, so that the equal diameters of the outer circles of the two bulging templates (the distance between the outer circle and the axle center of the tube blank 19 is equal) can be kept after the conical loading ram 3 is in place.
The cross section of the slide block 10 is T-shaped, and the inclination of the inner surface of the slide block 10 is the same as the taper of the tapered loading ram 3.
The connecting mechanism of the die forming mechanism 2 is completed by bolts, specifically, fixing bolts penetrate through the pressing plate 4, the upper bulging template 5, the clamping plate 6, the lower bulging template 7 and the backing plate 8 to connect the pressing plate 4, the clamping plate 6 and the backing plate 8, through holes matched with the fixing bolts are formed in the pressing plate 4, the clamping plate 6 and the backing plate 8, strip-shaped holes 11 matched with the fixing bolts are formed in the die units 9 of the upper bulging template 5 and the lower bulging template 7, and the strip-shaped holes 11 are arranged along the radius of the lower bulging template 7. The principle is as follows: the fixing bolts provide connection for the die forming mechanism 2, so that the pressing plate 4, the clamping plate 6 and the backing plate 8 can limit the longitudinal degree of freedom of the die unit 9, and the die unit 9 is not limited by the fixing bolts when moving inside and outside due to the arrangement of the strip-shaped holes 11, and the strip-shaped holes 11 of the upper bulging template 5 and the lower bulging template 7 are aligned as necessary.
The number of the fixing bolts is consistent with that of the die units 9 of the upper bulging template 5, and the fixing bolts are uniformly distributed in an annular array.
The bottom of the die piece forming mechanism 2 is arranged on a support 12, the bottom of the conical loading pressure head 3 is connected with a piston rod of a loading oil cylinder 13, the support 12 is directly arranged at the top of a cylinder body of the loading oil cylinder 13, and a through hole in clearance fit with the piston rod of the loading oil cylinder 13 is formed in the center of the support 12. The loading oil cylinder 13 is used as forming power, and a piston rod of the loading oil cylinder 13 is connected with the conical loading pressure head 3 to provide lifting power for the conical loading pressure head.
The outer side of the bulging device 1 is provided with a lifting table 14, the center of the lifting table 14 is provided with a through hole in clearance fit with the loading oil cylinder 13, and the bottom of the lifting table 14 is connected with a lifting mechanism;
the lifting mechanism comprises lifting screw rods 15, sleeves 16 and a driving mechanism, four lifting screw rods 15 are arranged at the bottom of the lifting platform 14, the lifting screw rods 15 are inserted into the sleeves 16 and are in threaded connection with the sleeves 16, and the sleeves 16 are fixedly arranged in the base 100; the four lifting screw rods 15 are all provided with synchronous chain wheels 17, the synchronous chain wheels 17 of the four lifting screw rods 15 are connected through chains, one lifting screw rod 15 is also provided with a driving chain wheel 18, the driving chain wheel 18 is connected with a driving mechanism through chain transmission, the driving mechanism comprises a motor, and a motor chain wheel on an output shaft of the motor is connected with the driving chain wheel 18 through chains. The principle is as follows: the motor drives the lifting screw rods 15 to rotate through chain transmission, the four lifting screw rods 15 realize synchronous rotation through chain transmission, and the lifting screw rods 15 synchronously ascend due to the action of threads while rotating, so that the lifting platform 14 is driven to ascend integrally; the top end of the lifting screw 15 is rotatably connected with the lifting table 14.
The loading cylinder 13 is mounted on the base 100 via a cylinder block.
The lifting platform 14 is provided with a clamp matched with the tube blank 19, specifically, the clamp comprises a clamp block matched with the tube blank 19 and provided with a semicircular clamp opening, the clamp block is connected with a telescopic rod of a clamp oil cylinder, power is provided by the clamp oil cylinder to drive the clamp blocks on two sides of the tube blank 19 to move to clamp the tube blank 19, and the coaxiality of the clamp block and the bulging device 1 is kept; further, the bottom of the clamping block is connected with a slide rail at the top of the lifting platform 14 through the slide block 10.
It should be noted that the conical loading ram 3 is entirely in the shape of an inverted truncated cone.
The motor is the existing mature servo motor equipment and is connected with a power supply through a switch for control and power supply.
The loading oil cylinder 13 is connected with the hydraulic station, the loading oil cylinder 13 adopts the existing mature oil cylinder equipment, and the connection relationship between the mechanism and the oil port thereof is the prior art and is not described herein again.
The corrugated pipe forming method of the automatic corrugated pipe forming device comprises the following specific steps:
step one, a tube blank 19 is placed on a lifting platform 14, the tube blank 19 is clamped through a clamp, the tube blank 19 and a conical loading pressure head 3 are coaxial, then the lifting platform 14 is driven to lift through a lifting mechanism, the height of the initial expansion wave of a lower bulging template 7 and the tube blank 19 is made to be consistent, a loading oil cylinder 13 drives the conical loading pressure head 3 to move downwards, a die piece unit 9 of the lower bulging template 7 is pushed to move outwards to bulge the outer tube blank 19 to generate discontinuous waveforms, the loading oil cylinder 13 drives the conical loading pressure head 3 to reset, and meanwhile, the die piece unit of the lower bulging template 7 resets under the action of a sliding block 10 and a sliding groove;
step two, the lifting platform 14 is driven to ascend through the lifting mechanism, so that the tube blank 19 moves along the axial direction for a single-wave expansion length, the height of the waveform to be processed of the lower bulging template 7 is consistent with that of the waveform to be processed of the tube blank 19, and the height of the discontinuous waveform formed by the upper bulging template 5 and the lower bulging template 7 is consistent; the loading oil cylinder 13 drives the conical loading pressure head 3 to move downwards, the die sheet units 9 of the lower bulging template 7 and the upper bulging template 5 are pushed to move outwards, the lower bulging template 7 bulges the external tube blank 19 to generate a discontinuous waveform again, the upper bulging template 5 bulges the external tube blank 19 to eliminate the bulge of the last discontinuous waveform which is not extruded and expanded in place to form a complete waveform; then the loading oil cylinder 13 drives the conical loading pressure head 3 to reset, and meanwhile, the die piece unit of the lower bulging template 7 resets under the action of the sliding block 10 and the sliding groove;
and step three, driving the lifting platform 14 to ascend through the lifting mechanism, enabling the tube blank 19 to move along the axial direction for a single-wave expansion length, and making up the discontinuous waveform and extruding and expanding the next waveform according to the step two until the target waveform number is processed.
Example two
Different from the first embodiment, the loading cylinder 13 is an adjustable stroke cylinder. The lifting height of the conical loading ram 3 can be adjusted by adjusting the stroke of the loading oil cylinder 13, so that the bulging diameters of the upper bulging template 5 and the lower bulging template 7 can be adjusted, and the device is suitable for the corrugation forming processing of pipe blanks 19 with various diameters.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (2)
1. The utility model provides a bellows automatic molding device which characterized in that: the mold piece forming mechanism comprises a pressing plate, an upper bulging template, a clamping plate, a lower bulging template and a backing plate which are stacked from top to bottom, the upper bulging template and the lower bulging template are both composed of a plurality of fan-shaped mold piece units distributed in an annular array, a sliding block is arranged at the inner end of each mold piece unit, a sliding groove is axially arranged on the outer wall of the conical loading pressing head, the sliding block is embedded in each mold piece, the number of the mold piece units of the upper bulging template and the number of the mold piece units of the lower bulging template are the same and are both N, the mold piece units of the upper bulging template and the mold piece units of the lower bulging template are distributed in a staggered mode, the staggered angle is 180 degrees/N, the distance between the upper bulging template and the lower bulging template is a single-wave expansion length, and the diameter of the base circle of the unit of the upper bulging template is larger than that of the base circle of the unit of the lower bulging template, the cross section of the sliding block is T-shaped, the inclination of the inner surface of the sliding block is the same as the taper of the tapered loading pressure head, the pressing plate, the upper bulging template, the clamping plate, the lower bulging template and the base plate are connected in a penetrating way through fixing bolts, through holes matched with the fixing bolts are arranged on the pressing plate, the clamping plate and the base plate, strip-shaped holes matched with the fixing bolts are arranged on the die sheet units of the upper bulging template and the lower bulging template, the strip-shaped hole is arranged along the radius of the lower bulging template, the bottom of the template molding mechanism is arranged on a support, the bottom of the conical loading pressure head is connected with a piston rod of a loading oil cylinder, the support is directly arranged at the top of a cylinder body of the loading oil cylinder, a through hole in clearance fit with a piston rod of the loading oil cylinder is formed in the center of the seat support, a lifting platform is arranged on the outer side of the bulging device, a through hole in clearance fit with the loading oil cylinder is formed in the center of the lifting platform, and the bottom of the lifting platform is connected with a lifting mechanism; the lifting mechanism comprises a lifting screw rod, a sleeve and a driving mechanism, four lifting screw rods are arranged at the bottom of the lifting platform, the lifting screw rods are inserted into the sleeve and are in threaded connection with the sleeve, and the sleeve is fixedly arranged in the base; the four lifting screw rods are all provided with synchronous chain wheels, the synchronous chain wheels of the four lifting screw rods are connected through chains, one of the lifting screw rods is also provided with a driving chain wheel, the driving chain wheel is connected with a driving mechanism through chain transmission, the driving mechanism comprises a motor, and a motor chain wheel on an output shaft of the motor is connected with the driving chain wheel through chains.
2. A corrugated pipe forming method of an automatic corrugated pipe forming apparatus according to claim 1, characterized in that: the method comprises the following steps:
step one, a tube blank is placed on a lifting platform, the lifting platform is driven to lift through a lifting mechanism, so that the height of the lower bulging template is consistent with the height of the initial bulging wave of the tube blank, a loading oil cylinder drives a conical loading pressure head to move downwards to push a die sheet unit of the lower bulging template to move outwards to bulge the outer tube blank to generate discontinuous waveforms, and the loading oil cylinder drives the conical loading pressure head and the die sheet unit to reset;
driving a lifting platform to ascend through a lifting mechanism to enable the pipe blank to move a single-wavelength expansion length along the axial direction; the loading oil cylinder drives the conical loading pressure head to move downwards to push the die sheet units of the lower bulging template and the upper bulging template to move outwards, the lower bulging template bulges the external tube blank to generate a discontinuous waveform again, and the upper bulging template bulges the external tube blank to eliminate the bulge of the previous discontinuous waveform which is not extruded and expanded in place to form a complete waveform; then the loading oil cylinder drives the conical loading pressure head and the die sheet unit to reset;
and step three, driving the lifting platform to ascend through the lifting mechanism, enabling the pipe blank to move along the axial direction by a single-wave expansion length, compensating the discontinuous waveform according to the step two, and extruding and expanding the next waveform until the target waveform number is processed.
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| CN201910182275.4A CN109926481B (en) | 2019-03-11 | 2019-03-11 | Automatic corrugated pipe forming device and method |
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| CN201910182275.4A CN109926481B (en) | 2019-03-11 | 2019-03-11 | Automatic corrugated pipe forming device and method |
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| CN109926481B true CN109926481B (en) | 2020-09-18 |
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| CN111059396B (en) * | 2019-11-21 | 2021-08-20 | 江苏五星波纹管有限公司 | Shock-absorbing high-strength anti-corrosion compensator and processing method thereof |
| CN112958670B (en) * | 2021-03-29 | 2022-12-27 | 西安恒热热力技术有限责任公司 | Compensator machining equipment and machining method |
| CN114734265B (en) * | 2022-06-13 | 2022-08-30 | 沈阳晨光弗泰波纹管有限公司 | Corrugated pipe manufacturing system and manufacturing method |
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| CN106077203A (en) * | 2016-06-23 | 2016-11-09 | 江苏双嘉液压机械制造有限公司 | A kind of bellow expander |
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| US3952575A (en) * | 1975-01-30 | 1976-04-27 | Straza Enterprises Ltd. | Bellows forming apparatus |
| CN102284580A (en) * | 2011-06-20 | 2011-12-21 | 石家庄巨力科技有限公司 | Large corrugated pipe forming machine |
| CN203390027U (en) * | 2013-01-17 | 2014-01-15 | 沈阳汇博热能设备有限公司 | Large-diameter multilayer metal bellows forming die |
| CN104889271A (en) * | 2014-03-03 | 2015-09-09 | 秦春娟 | Numerical-control mechanical corrugation expansion machine and corrugated pipe forming method thereof |
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