CN103072275A - Preparation method of ultra-large polytetrafluoroethylene seal ring - Google Patents
Preparation method of ultra-large polytetrafluoroethylene seal ring Download PDFInfo
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- CN103072275A CN103072275A CN2013100325085A CN201310032508A CN103072275A CN 103072275 A CN103072275 A CN 103072275A CN 2013100325085 A CN2013100325085 A CN 2013100325085A CN 201310032508 A CN201310032508 A CN 201310032508A CN 103072275 A CN103072275 A CN 103072275A
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- teflin ring
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Abstract
The invention provide a preparation method of an ultra-large polytetrafluoroethylene seal ring, which comprises the steps of (a) cutting the two ends of a polytetrafluoroethylene plate to form inclined planes with the same angle, and (b) welding the two ends of the polytetrafluoroethylene plate together to form the ultra-large polytetrafluoroethylene seal ring, wherein the external diameter of the ultra-large polytetrafluoroethylene seal ring is 2-10m. The ultra-large polytetrafluoroethylene seal ring can be obtained with the adoption of the preparation method.
Description
Technical field
The present invention relates to the polytetrafluoroethylene (PTFE) field, relate in particular to a kind of preparation method of ultra-large type teflin ring.
Background technology
Polytetrafluoroethylene (PTFE) (Polytetrafluoroethene is abbreviated as PTFE) generally is called " non-sticking lining " or " easy clean pot material ", is a kind of artificial synthesized polymer material that has used fluorine to replace all hydrogen atoms in the polyethylene.This material has the characteristics of antiacid alkali resistant, anti-various organic solvents, is dissolved in hardly all solvents.Simultaneously, polytetrafluoroethylene (PTFE) has resistant to elevated temperatures characteristics, and its coefficient of friction is extremely low, so can do after the lubrication, also becomes the desirable coating of easy clean pot and water pipe internal layer.Because the not sticking characteristic of polytetrafluoroethylene (PTFE), at present technically be difficult to make the external diameter of polytetrafluoroethylene (PTFE) packing ring to reach large-size (generally all being confined to 2000mm following), therefore limit the application of polytetrafluoroethylene (PTFE) packing ring, for example just can't adopt the polytetrafluoroethylene (PTFE) packing ring to seal on some large equipments or as back-up ring, piston ring use.Solve polytetrafluoroethylene (PTFE) product bonding or welding and just seem particularly urgent.
Ultra-large type polytetrafluoroethylene (PTFE) packing ring (surpassing diameter 2000mm) generally adopts the mode of sweat soldering or adhesives to produce, mostly adopt two cut surfaces to be cut into the inclined-plane welding of constant slope or the mode that is bonded together is made, the shape of cut surface and quality to reach higher weld strength, uniformity and the reliability of product solder joint plays conclusive important function.In addition, the temperature requirement of welding also plays a part outbalance to the effect of welding.
In view of this, how designing a kind of preparation method of ultra-large type teflin ring, to obtain the ultra-large type teflin ring, is the problem that the insider needs solution badly.
Summary of the invention
In prior art, be difficult to make the external diameter of polytetrafluoroethylene (PTFE) sealing ring to reach this defective of large-size, the invention provides a kind of preparation method of ultra-large type teflin ring.
According to the present invention, a kind of preparation method of ultra-large type teflin ring is provided, wherein, comprising:
(a) the identical inclined-plane of two ends angulation of cutting polytetrafluoroethylene (PTFE) sheet material; And
(b) two ends of the described polytetrafluoroethylene (PTFE) sheet material of welding form the ultra-large type teflin ring in together, and the external diameter of described ultra-large type teflin ring is 2～10m.
Preferably, in the described step (a), the angular range on described inclined-plane is 10～45 °.
Preferably, in the described step (a), the two ends of cutting described polytetrafluoroethylene (PTFE) sheet material by cutter sweep, described cutter sweep comprises:
Fuselage with base and support, described support vertical are connected on the described base;
Activity is fixed on the described support and is adjusted platform;
Be fixed in the elevating mechanism on the described base;
Be fixed in the first motor of described elevating mechanism one side;
Be connected in the cutter of described the first motor, have several hobboing cutters, adjacent two described hobboing cutters are fixedly connected, and described cutter is cylindric; And
Be connected in the second motor of described elevating mechanism opposite side,
Wherein, described adjustment platform is positioned at the top of described cutter, and the knife edge of described hobboing cutter is towards described adjustment platform, and described adjustment platform rotational angle is 0～180 °, in three-dimensional coordinate, move in Y direction at X-axis, the described elevating mechanism of described the second motor-driven, described cutter is mobile in Y direction under the start of described elevating mechanism, and described support is mobile in X-direction, the number of degrees of described acute angle as required, mobile described support is also adjusted described adjustment platform, mobile described cutter.
Preferably, in the described step (b), the two ends of welding described polytetrafluoroethylene (PTFE) sheet material by welder are in together, and described welder comprises:
The welding table top, carrying ultra-large type polytetrafluoroethylene (PTFE) sheet material;
Heated jig is clamped the two ends of described polytetrafluoroethylene (PTFE) sheet material and is heated;
Location structure is used for the two ends of described polytetrafluoroethylene (PTFE) sheet material are positioned, and comprising:
The length direction location structure is arranged on the described welding table top;
The width location structure is arranged on the described welding table top; And
The short transverse location structure is arranged on the described welding table top;
Attemperating unit is connected in described heated jig, and described attemperating unit is used for detecting and control the heating-up temperature at the two ends of described polytetrafluoroethylene (PTFE) sheet material, comprising:
Temperature sensor;
Temperature controller is connected in described temperature sensor, and the temperature that described temperature controller detects according to described temperature sensor is with the heating-up temperature at the two ends of controlling described polytetrafluoroethylene (PTFE) sheet material; And
The time relay is connected in described heated jig with the heat time heating time at the two ends of controlling described polytetrafluoroethylene (PTFE) sheet material; And
Protector comprises:
Cage is arranged on the described welding table top and covers described ultra-large type polytetrafluoroethylene (PTFE) sheet material, and described cage is used for isolating the pernicious gas that welding process goes out to produce; And
Ventilating fan is communicated in described cage, and described ventilating fan is used for described pernicious gas is discharged.
Preferably, described heated jig is electric heating tube or stainless steel heating tape.
Preferably, described short transverse location structure is the first cylinder, and described the first cylinder positions in described short transverse by the two ends of pressuring method to described polytetrafluoroethylene (PTFE) sheet material.
Preferably, in described (b) step, the two ends of described polytetrafluoroethylene (PTFE) sheet material are heated to first 320～330 ℃ and keep 1～5min, continue to be warming up to 370～380 ℃ and keep 2～5min, then cooling.
Preferably, it is characterized in that, also comprise: (c) surface of described ultra-large type teflin ring is processed.
Preferably, in described (c) step, by surface processing device the surface of described ultra-large type teflin ring is processed, described surface processing device comprises:
Workbench;
Plummer is positioned on the described workbench, and described plummer carries described ultra-large type teflin ring, and the edge of described ultra-large type teflin ring protrudes from described plummer;
Adjusting part is arranged on the described workbench;
The second cylinder is connected in described adjusting part and is positioned at described ultra-large type teflin ring top;
Processing mechanism, the surface that is used for processing described ultra-large type teflin ring comprises:
The first support bar is connected in described cylinder and is positioned at described ultra-large type teflin ring top; And
Processing components, be movably installed in the lower end of described the first support bar, described processing components is used for processing the surface of described ultra-large type teflin ring, and in three-dimensional coordinate, it is mobile in X-axis, Y-axis and Z-direction that described adjusting part is regulated described processing mechanism;
The 3rd motor is connected in described the second cylinder mobile in Y direction to drive described the second cylinder; And
Transmission component is arranged on the described workbench, and described transmission component is used for making described ultra-large type teflin ring rotation; And
Limit assembly is arranged on the described workbench, and described limit assembly is used for limiting described ultra-large type teflin ring distortion.
Preferably, described limit assembly comprises:
Several external compression mechanisms are arranged on the described workbench and prop up the outer ring surface of described ultra-large type teflin ring;
Hold-down mechanisms in several are arranged on the described plummer and prop up the inner ring surface of described ultra-large type teflin ring; And
Hold-down mechanism on several is arranged on the described workbench and pushes down the upper surface of described ultra-large type teflin ring,
Wherein, described external compression mechanism, described interior hold-down mechanism and described upper hold-down mechanism all comprise:
The second support bar is fixed on the described plummer;
Elastic construction is arranged on described the second support bar; And
Compressing member props up the surface of described ultra-large type teflin ring, and described elastic construction is connected in described compressing member.
Advantage of the present invention is: realized the whole process of product from the post processing of welding pre-treatment (namely cutting), welding and finish to welding (i.e. polishing), realize by covering device processing, the outside dimension of having broken through present polytetrafluoroethylene (PTFE) sealing ring is the limitation below 2000mm only, realized any lengthening of washer outer diameter size, solved the difficult problem of polytetrafluoroethylene (PTFE) goods welding, can prepare the above ultra-large type teflin ring of diameter 2000mm, solve the sealing problem of large equipment.Whole Process Design special fixture and cutter, processing and welding process have realized mechanization or automation, in operation, only need substantially can automatically finish behind the artificial setup parameter, and easy and simple to handle, simple training just can be produced in batches afterwards.And, in process of production to by protector, avoided the pernicious gas that in the process of preparation ultra-large type teflin ring, produces to the injury of human body.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 shows the structured flowchart according to the preparation facilities of ultra-large type teflin ring of the present invention.
Fig. 2 shows the structural representation of the cutter sweep among Fig. 1.
Fig. 3 shows the structure for amplifying schematic diagram of cutter among Fig. 1.
Fig. 4 shows the structural representation of cutter cutting ultra-large type polytetrafluoroethylproducts products among Fig. 2.
Fig. 5 shows the structured flowchart of the welder among Fig. 1.
Fig. 6 shows the structural representation of the welder among Fig. 5.
Fig. 7 shows the structure for amplifying schematic diagram of the location structure among Fig. 5.
Fig. 8 shows the structural representation of the surface processing device among Fig. 1.
Fig. 9 shows the structure for amplifying schematic diagram of the transmission component among Fig. 8
Figure 10 shows the top view of the cross section of the ultra-large type teflin ring among Fig. 8.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Fig. 1 shows the structured flowchart according to the preparation facilities of ultra-large type teflin ring of the present invention.With reference to Fig. 1, the preparation facilities 1 of ultra-large type teflin ring comprises: cutter sweep 100, welder 200 and surface processing device 300.Wherein, cutter sweep 100 is used for the two ends of ultra-large type polytetrafluoroethylene (PTFE) sheet material are cut with the identical inclined-plane of angulation.Welder 200 is that the two ends with the ultra-large type polytetrafluoroethylene (PTFE) sheet material of well cutting weld together, to form the ultra-large type teflin ring.After welding is finished, the phenomenon that may have welding position out-of-flatness, change in size or variable color, need to process this position processing, surface processing device 300 is then processed upper surface, lower surface, inner ring surface, the outer ring surface of ultra-large type teflin ring, simultaneously can also carry out groove, polishing, equating and cleaning to the surface of ultra-large type teflin ring, realized the processing procedure that product is carried out after welding is finished.
Fig. 2 shows the structural representation of the cutter sweep among Fig. 1.With reference to Fig. 2, cutter sweep 100 comprises fuselage, adjusts platform 120, elevating mechanism 130, the first motor 140, cutter 150.Wherein, fuselage has base 111 and support 112, and support 112 is mutually vertical with base 111, and support 112 is connected on the base 111, in three-dimensional coordinate, support 112 can be adjusted on the X-direction or mobile (product for wider width is particularly important) by being engaged in of screw rod and nut.Adjusting 120 activities of platform is fixed on the support 112, in the present embodiment, adjusting platform 120 also can be by rotating in 0～180 ° of angular range under the cooperation of screw rod and nut, be used for adjusting cutting angle, the first screw rod is so that cutter sweep can be along processing the inclined-plane on the ultra-large type polytetrafluoroethylene (PTFE) sheet material length direction.Elevating mechanism 130 is fixed on the base 111.140 in the first motor is fixed in a side of elevating mechanism 130, cutter 150 is connected in the first motor 140, cutter 150 can move up and down under the start of elevating mechanism 130 equally, and cutter 150 can also cut cutting object under the driving of the first motor 140.The second motor 160 is connected in the opposite side of elevating mechanism 130, and under the driving of the second motor 160, elevating mechanism 130 can move in Y direction.Wherein, adjust the top that platform 120 is positioned at cutter 150, and the knife edge of cutter 150 is towards adjusting platform 120.
Fig. 3 shows the structure for amplifying schematic diagram of cutter among Fig. 1.With reference to Fig. 3, cutter 150 has several hobboing cutters 151, and two adjacent hobboing cutters 151 are mutually permanently connected, concrete, can fix two adjacent hobboing cutters 151 by bolt, several hobboing cutter 151 usefulness bolts connect and are cylindric, and the knife edge of hobboing cutter 151 is towards adjusting platform 120.
Fig. 4 shows the structural representation of cutter cutting ultra-large type polytetrafluoroethylproducts products among Fig. 2.In conjunction with reference to Fig. 2 and Fig. 4,2(is for example rectangular-shaped to ultra-large type polytetrafluoroethylene (PTFE) sheet material) when cutting, ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 is positioned over adjusts on the platform 120, the second motor 160 drives elevating mechanism 130 and moves in Y direction.Cutter 150 also moves in Y direction under the drive of elevating mechanism 130, the angle [alpha] on the inclined-plane at the two ends of ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 as required, adjusting the first screw rod makes and adjusts platform 120 and rotate and contact with the knife edge of cutter 150, the first motor 140 drives cutter 150 so that ultra-large type tetrafluoroethene (PTFE) sheet material 2 is cut, make the two ends of ultra-large type tetrafluoroethene (PTFE) sheet material 2 form the inclined-plane, and the angle [alpha] on inclined-plane is met the requirements, the angular range on inclined-plane can be 10～45 °.
Fig. 5 shows the structured flowchart of the welder among Fig. 1.After utilizing the two ends of 100 pairs of ultra-large type polytetrafluoroethylene (PTFE) of cutter sweep sheet material 2 to cut, the two ends by welder welding ultra-large type polytetrafluoroethylene (PTFE) sheet material are in together to form the ultra-large type teflin ring.With reference to Fig. 5, welder 200 comprises: welding table top 210(sees Fig. 6), location structure 220, heated jig 230, attemperating unit 240 and protector 250.Fig. 6 shows the structural representation of the standby device of welding among Fig. 5.With reference to Fig. 6, the ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 of two ends well cutting places on the welding table top 210.Heated jig 230 also is arranged on the welding table top 210, and heated jig 230 is clamped the two ends of ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 and it is heated, so that the two ends of ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 are welded in together, thereby obtain the ultra-large type teflin ring.Heated jig 230 can be electric heating tube, but not as limit, can also be the stainless steel heating tape.Protector 250 comprises: cage 251 and ventilating fan 252.Cage 251 is arranged on the welding table top 210, and cage 251 covers ultra-large type polytetrafluoroethylene (PTFE) sheet material 2, to be isolated in the pernicious gas that produces in ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 heating processes, avoids human body is damaged.252 of ventilating fans are connected with cage 251, and it can be discharged the pernicious gas that produces, and collect unified the processing.
Continuation is with reference to Fig. 5, and 240 of attemperating units are connected in heated jig 230, and it comprises temperature sensor 241, temperature controller 242 and time relay 243.Wherein, temperature sensor 241 is used for detecting the heating-up temperature that the two ends of ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 reach.Temperature controller 242 is connected in temperature sensor 241 and heated jig 230, and temperature controller 242 is used for controlling the heating-up temperature at 230 pairs of ultra-large type polytetrafluoroethylene (PTFE) of heated jig sheet material, 2 two ends.The time relay 243 also is connected in heated jig 230, and it is used for controlling the heat time heating time at 230 pairs of ultra-large type polytetrafluoroethylene (PTFE) of heated jig sheet material, 2 two ends.
Fig. 7 shows the structure for amplifying schematic diagram of the location structure among Fig. 5.With reference to Fig. 7, location structure 220 is arranged on the welding table top 210, be used for the two ends of ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 are positioned, it specifically comprises: length direction location structure 221, width location structure 222 and short transverse location structure 223 are used for respectively locating the position of two ends on length direction, width and short transverse of ultra-large type polytetrafluoroethylene (PTFE) sheet material 2.And in the present embodiment, short transverse location structure 223 can be the first cylinder, and the first cylinder positions in short transverse by the two ends of pressuring method to ultra-large type polytetrafluoroethylene (PTFE) sheet material 2.
Fig. 8 shows the structural representation of the surface processing device among Fig. 1.Can process by 300 pairs of surfaces through the ultra-large type teflin ring 3 of formation after welder 200 welding of surface processing device.With reference to Fig. 8, surface processing device 300 comprises: workbench 310, plummer 320, adjusting part 330, the second cylinder 340, processing mechanism, the 3rd motor 360, transmission component 370 and limit assembly.Wherein, plummer 320 is positioned on the workbench 310, is used for carrying ultra-large type teflin ring 3, and the edge of ultra-large type teflin ring 3 protrudes from plummer 320, and namely the edge of ultra-large type teflin ring 3 is suspended on plummer 320.Adjusting part 330 is arranged on the workbench 310, and in three-dimensional coordinate, adjusting part 330 is transportable in X-axis, Y-axis and Z-direction, so it can be used for regulating the position of ultra-large type teflin ring 3 on X-axis, Y-axis and Z-direction.The second cylinder 340 is positioned at the top at the edge of ultra-large type teflin ring 3, and be connected in adjusting part 330, the second cylinder 340 can be mobile in Y direction, therefore the second cylinder 340 also can regulate ultra-large type teflin ring 3 on Y direction away from edge near ultra-large type teflin ring 3.
Processing mechanism then comprises the first support bar 351 and processing components 352.Wherein, the first support bar 351 is connected with the second cylinder 340, and is positioned at the top, edge of ultra-large type teflin ring 3.Processing components 352 is movably installed in the lower end of the first support bar 351, is used for processing ultra-large type teflin ring 3.360 in the 3rd motor is connected in the second cylinder 340, to drive 340 starts of the second cylinder.Transmission component 370 also is arranged on the workbench 310, and be positioned at the below at the edge of ultra-large type teflin ring 3, transmission component 370 is used for making ultra-large type teflin ring 3 to be rotated, so that process at each position on the surface of 352 pairs of ultra-large type teflin rings 3 of processing components.Limit assembly is arranged on the workbench 310, props up the surface of ultra-large type teflin ring 3, to be used for limiting the position of ultra-large type teflin ring 3.Limit assembly comprises: several external compression mechanisms 381, several interior hold-down mechanisms 382 and hold-down mechanism 383 on several.Wherein, several external compression mechanisms 381 are arranged on the workbench 310, and prop up the outer ring surface 301 of ultra-large type teflin ring 3.Hold-down mechanisms 382 are arranged on the plummer 320 on the workbench 310 in several, and prop up the inner ring surface 302 of ultra-large type teflin ring 3.383 of hold-down mechanisms are arranged on the workbench 310 on several, and push down the upper surface 303 of ultra-large type teflin ring 3.
Processing components 352 can be done corresponding replacing according to different needs, for example can be cutter, in emery wheel or the polishing wheel any one, particularly, when scabbling the surface of ultra-large type teflin ring 3, during cutting process, processing components 352 can be cutter, as shown in Figure 1, for upper surface 303(such as need to ultra-large type teflin ring 3 are processed the lower surface of ultra-large type teflin ring 3, then ultra-large type teflin ring 3 is inverted on the plummer 320 and gets final product) to process, the processing components 352 that is installed on the first support bar 351 lower ends is milling cutter.In a further embodiment, in the time of need to processing the inner ring surface 302 of ultra-large type teflin ring 3 and outer ring surface 301, then processing components 352 is replaced by hobboing cutter and gets final product.Certainly in the time of need to carrying out grinding process to the surface of ultra-large type teflin ring 3, then processing components 352 is replaced by emery wheel or polishing wheel, and to carry out groove when processing to the surface of ultra-large type teflin ring 3, then processing components 352 is replaced by molding cutter, the shape of molding cutter and the shape of groove are complementary.Certainly, processing components 352 is as limit, but according to the surperficial required processing of ultra-large type teflin ring 3, carries out in good time replacing.
Fig. 9 shows the structure for amplifying schematic diagram of the transmission component among Fig. 8.With reference to Fig. 9, transmission component 370 comprises: driving wheel 371, two driven pulleys 372, transmission chain 373, support roller 374, regulating wheel 375 and the 4th motor (not illustrating).Wherein, two driven pulleys 372 are arranged at respectively the both sides of driving wheel 371, and set up the edge of ultra-large type teflin ring 3, two driven pulleys 372 are positioned at the top of driving wheel 371, and two driven pulleys 372 rotate under the drive of driving wheel 371, thereby ultra-large type teflin ring 3 is rotated.Transmission chain 373 is set around on driving wheel 371 and two driven pulleys 372, to connect driving wheel 371 and two driven pulleys 372.374 of support rollers and set up the edge of ultra-large type teflin ring 3 between two driven pulleys 372.Regulating wheel 375 is between support roller 374 and driving wheel 371, and be installed with on transmission chain 373, and two driven pulleys 372 lay respectively at the both sides of regulating wheel 375, regulating wheel 375 is used for making transmission chain 373 tensionings, avoid transmission chain 373 to skid or come off at driving wheel 371 and two driven pulleys 372, reduce noise.The 4th motor is connected in driving wheel 371, rotates to drive driving wheel 371.
Continuation is with reference to Fig. 9, and the operation principle of transmission component 370 is as follows: the 4th motor-driven driving wheel 371 rotates, and 371 of driving wheels drive two driven pulleys 372 and rotate, and under the rotation of two driven pulleys 372, ultra-large type teflin ring 3 is rotated.
Figure 10 shows the top view of the cross section of the ultra-large type teflin ring among Fig. 8.With reference to Fig. 3, the number of external compression mechanism 381, interior hold-down mechanism 382 can all be set to 8, and the number of upper hold-down mechanism 383 can be set to 4, but not as limit, can set according to the size of ultra-large type teflin ring 3.And in the present embodiment, external compression mechanism 381 and the one by one corresponding setting of interior hold-down mechanism 382.Each external compression mechanism 381, interior hold-down mechanism 382 and upper hold-down mechanism 383 comprise: the second support bar 384, elastic construction 385 and compressing member 386.The second support bar 384 is fixed on the workbench 310, and 385 of elastic constructions are arranged on the second support bar 384, and elastic construction 385 can be spring, but not as limit, as long as have spring function.Compressing member 386 is connected in elastic construction 385, and the shape of compressing member 386 can for cylindrical or spherical, be cylindrical in the present embodiment.Concrete, the second support bar 384 of external compression mechanism 381 is fixed on the workbench 310, and pushes down the outer ring surface 301 of ultra-large type teflin ring 3 under the elastic force effect of its elastic construction 385.384 of second support bars of interior hold-down mechanism 382 are fixed on the plummer 320 on the workbench 310, and prop up the inner ring surface 302 of ultra-large type teflin ring 3 under the elastic force effect of its elastic construction 385.In addition, in the present embodiment, can also be provided with connecting screw rod 390 on the second support bar 384 of interior hold-down mechanism 382, to regulate compressing member 386 apart from the spacing of the ring heart of ultra-large type teflin ring 3 according to the internal diameter size of ultra-large type teflin ring 3.The second support bar 384 of upper hold-down mechanism 383 is fixed on the workbench 310, and pushes down the upper surface 303 of ultra-large type teflin ring 3 under the elastic force effect of its elastic construction 385.
The preparation process of ultra-large type teflin ring is as follows:
At first, cut the two ends of ultra-large type polytetrafluoroethylene (PTFE) sheet materials 2 to form the inclined-plane by cutter sweep 100.In conjunction with reference to Fig. 2～Fig. 4, ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 is positioned on the adjustment platform 120, adjust elevating mechanism 130 mobile in Y direction, so that the knife edge of cutter 150 is aimed at and an end of ultra-large type polytetrafluoroethylene (PTFE) sheet material 2, rotate adjustment platform 120 according to the angle [alpha] on the inclined-plane that will cut formation, the end that the first motor 140 drives 150 pairs of ultra-large type polytetrafluoroethylene (PTFE) of cutter sheet material 2 cuts, behind the one end well cutting of ultra-large type polytetrafluoroethylene (PTFE) sheet material 2, again the other end of ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 cut, made the angle [alpha] on the inclined-plane that ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 two ends form identical.
Then, weld together by the two ends of welder 200 with the ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 of well cutting, to form ultra-large type teflin ring 3.In conjunction with reference to Fig. 5～Fig. 7, the ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 of two ends well cutting is positioned on the welding table top 210, the inclined-plane 201 at ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 two ends is in contact with one another, heated jig 230 steps up ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 two ends, then utilizes the two ends of length direction location structure 221, width location structure 222 and 223 pairs of ultra-large type polytetrafluoroethylene (PTFE) of short transverse location structure sheet material 2 to position.Then heat at the two ends of 230 pairs of ultra-large type polytetrafluoroethylene (PTFE) of heated jig sheet material 2, be heated to first 320～330 ℃, for example 325 ℃, and keep 1～5min, 4min for example, in this heating process, temperature sensor 241 can detect the heating-up temperature that ultra-large type polytetrafluoroethylene (PTFE) sheet materials 2 reach, and the heating-up temperature that detects is sent to temperature controller 242 so that temperature controller 242 with ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 heating and temperature control at 320～330 ℃.Simultaneously, the time relay 243 can be controlled the heat time heating time at the two ends of 230 pairs of ultra-large type polytetrafluoroethylene (PTFE) of heated jig sheet material 2.Then heated jig 230 continues the two ends of ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 are heated, and makes its temperature rise to 370～380 ℃, and for example 375 ℃, and keep 2～5min, for example 3min, then cooling.In this heating process, the heating-up temperature that the temperature sensor 241 same two ends of detecting ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 reach, and the heating-up temperature that detects is sent to temperature controller 242 so that temperature controller 242 with ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 heating and temperature control at 370～380 ℃.Simultaneously, the time relay 243 can be controlled the heat time heating time at the two ends of 230 pairs of ultra-large type polytetrafluoroethylene (PTFE) of heated jig sheet material 2 equally.At last, heated jig 230 welds together the two ends of ultra-large type polytetrafluoroethylene (PTFE) sheet material 2 firmly, thereby forms ultra-large type teflin ring 3.In addition, in whole heating process, cage 251 covers ultra-large type polytetrafluoroethylene (PTFE) sheet material 2, with the pernicious gas that produces in the isolation heating process, ventilating fan 252 is then discharged the pernicious gas that produces, and collects unified the processing, to avoid pernicious gas human body is damaged.
At last, process by the surface of 300 pairs of ultra-large type teflin rings 3 of surface processing device.In conjunction with reference to Fig. 8～Figure 10, ultra-large type teflin ring 3 is positioned on the plummer 320, and makes its edge unsettled.If in the time of need to processing the upper surface 303 of ultra-large type teflin ring 3,330 of adjusting parts are regulated the second cylinder 340 so that processing components 352 is aimed at the upper surface 303 of ultra-large type teflin ring 3 and it is processed, simultaneously under the effect of transmission component 370,3 rotations of ultra-large type teflin ring, processing components 352 can be processed each position of the upper surface 303 of ultra-large type teflin ring 3, if the upper surface 303 of ultra-large type teflin ring 3 need to cut, scabble processing, 352 of processing components can adopt milling cutter, if need to polish, 352 of processing components can adopt emery wheel or polishing wheel, certainly can also as required processing components 352 be replaced by molding cutter and the upper surface 303 of ultra-large type teflin ring 3 is carried out groove process.After the upper surface 303 of ultra-large type teflin ring 3 is finished dealing with, starting the 3rd motor 360 moves along Y direction to drive the second cylinder 340, make processing components 352 leave the upper surface 303 of ultra-large type teflin ring 3, then by adjusting part 330, drive the second cylinder 340 and move so that outer ring surface 301 or inner ring surface 302 that processing components 352 is aimed at ultra-large type teflin ring 3 are processed along X-axis and Z-direction.Similarly, transmission component 370 makes 3 rotations of ultra-large type teflin ring simultaneously, so that process at each position of the outer ring surface 301 of 352 pairs of ultra-large type teflin rings 3 of processing components or inner ring surface 302, if and the outer ring surface 301 of ultra-large type teflin ring 3 or inner ring surface 302 need to cut, scabble processing, 352 of processing components can adopt hobboing cutter, if need to polish, 352 of processing components can adopt emery wheel or polishing wheel, certainly can also as required processing components 352 be replaced by molding cutter and the outer ring surface 301 of ultra-large type teflin ring 3 or inner ring surface 302 are carried out groove process.
In above-mentioned processing engineering, external compression mechanism 381, interior hold-down mechanism 382 and upper hold-down mechanism 383 can be pushed down respectively the outer ring surface 301 of ultra-large type teflin ring, inner ring surface 302 and upper surface 303, their compressing member 386 is under the elastic force effect of elastic construction 385, can prop up tightly the outer ring surface 301 of ultra-large type teflin ring, inner ring surface 302 and upper surface 303, in addition, can also regulate according to the internal diameter size of ultra-large type teflin ring 3 position of compressing member 386 on connecting screw rod 390 of interior hold-down mechanism 382, with the compressing member 386 of regulating interior hold-down mechanism 382 spacing apart from the ring heart of ultra-large type teflin ring 3.
Advantage of the present invention is: realized the whole process of product from the post processing of welding pre-treatment (namely cutting), welding and finish to welding (i.e. polishing), realize by covering device processing, the outside dimension of having broken through present polytetrafluoroethylene (PTFE) sealing ring is the limitation below 2000mm only, realized any lengthening of washer outer diameter size, solved the difficult problem of polytetrafluoroethylene (PTFE) goods welding, can prepare the above ultra-large type teflin ring of diameter 2000mm, solve the sealing problem of large equipment.Whole Process Design special fixture and cutter, processing and welding process have realized mechanization or automation, in operation, only need substantially can automatically finish behind the artificial setup parameter, and easy and simple to handle, simple training just can be produced in batches afterwards.And, in process of production to by protector, avoided the pernicious gas that in the process of preparation ultra-large type teflin ring, produces to the injury of human body.
Above demonstration and described basic principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (10)
1. the preparation method of a ultra-large type teflin ring is characterized in that, comprising:
(a) the identical inclined-plane of two ends angulation of cutting polytetrafluoroethylene (PTFE) sheet material; And
(b) two ends of the described polytetrafluoroethylene (PTFE) sheet material of welding form the ultra-large type teflin ring in together, and the external diameter of described ultra-large type teflin ring is 2～10m.
2. the preparation method of ultra-large type teflin ring as claimed in claim 1 is characterized in that, in the described step (a), the angular range on described inclined-plane is 10～45 °.
3. the preparation method of ultra-large type teflin ring as claimed in claim 2 is characterized in that, in the described step (a), and the two ends of cutting described polytetrafluoroethylene (PTFE) sheet material by cutter sweep, described cutter sweep comprises:
Fuselage with base and support, described support vertical are connected on the described base;
Activity is fixed on the described support and is adjusted platform;
Be fixed in the elevating mechanism on the described base;
Be fixed in the first motor of described elevating mechanism one side;
Be connected in the cutter of described the first motor, have several hobboing cutters, adjacent two described hobboing cutters are fixedly connected, and described cutter is cylindric; And
Be connected in the second motor of described elevating mechanism opposite side,
Wherein, described adjustment platform is positioned at the top of described cutter, and the knife edge of described hobboing cutter is towards described adjustment platform, and described adjustment platform rotational angle is 0～180 °, in three-dimensional coordinate, move in Y direction at X-axis, the described elevating mechanism of described the second motor-driven, described cutter is mobile in Y direction under the start of described elevating mechanism, and described support is mobile in X-direction, the number of degrees of described acute angle as required, mobile described support is also adjusted described adjustment platform, mobile described cutter.
4. the preparation method of ultra-large type teflin ring as claimed in claim 1 is characterized in that, in the described step (b), the two ends of welding described polytetrafluoroethylene (PTFE) sheet material by welder are in together, and described welder comprises:
The welding table top, carrying ultra-large type polytetrafluoroethylene (PTFE) sheet material;
Heated jig is clamped the two ends of described polytetrafluoroethylene (PTFE) sheet material and is heated;
Location structure is used for the two ends of described polytetrafluoroethylene (PTFE) sheet material are positioned, and comprising:
The length direction location structure is arranged on the described welding table top;
The width location structure is arranged on the described welding table top; And
The short transverse location structure is arranged on the described welding table top;
Attemperating unit is connected in described heated jig, and described attemperating unit is used for detecting and control the heating-up temperature at the two ends of described polytetrafluoroethylene (PTFE) sheet material, comprising:
Temperature sensor;
Temperature controller is connected in described temperature sensor, and the temperature that described temperature controller detects according to described temperature sensor is with the heating-up temperature at the two ends of controlling described polytetrafluoroethylene (PTFE) sheet material; And
The time relay is connected in described heated jig with the heat time heating time at the two ends of controlling described polytetrafluoroethylene (PTFE) sheet material; And
Protector comprises:
Cage is arranged on the described welding table top and covers described ultra-large type polytetrafluoroethylene (PTFE) sheet material, and described cage is used for isolating the pernicious gas that welding process goes out to produce; And
Ventilating fan is communicated in described cage, and described ventilating fan is used for described pernicious gas is discharged.
5. the preparation method of ultra-large type teflin ring as claimed in claim 4 is characterized in that, described heated jig is electric heating tube or stainless steel heating tape.
6. the preparation method of ultra-large type teflin ring as claimed in claim 4, it is characterized in that, described short transverse location structure is the first cylinder, and described the first cylinder positions in described short transverse by the two ends of pressuring method to described polytetrafluoroethylene (PTFE) sheet material.
7. the preparation method of ultra-large type teflin ring as claimed in claim 1, it is characterized in that, in described (b) step, the two ends of described polytetrafluoroethylene (PTFE) sheet material are heated to first 320～330 ℃ and keep 1～5min, continue to be warming up to 370～380 ℃ and keep 2～5min, then cooling.
8. such as the preparation method of each described ultra-large type teflin ring of claim 1 to 7, it is characterized in that, also comprise: (c) surface of described ultra-large type teflin ring is processed.
9. the preparation method of ultra-large type teflin ring as claimed in claim 8, it is characterized in that, in described (c) step, by surface processing device the surface of described ultra-large type teflin ring is processed, described surface processing device comprises:
Workbench;
Plummer is positioned on the described workbench, and described plummer carries described ultra-large type teflin ring, and the edge of described ultra-large type teflin ring protrudes from described plummer;
Adjusting part is arranged on the described workbench;
The second cylinder is connected in described adjusting part and is positioned at described ultra-large type teflin ring top;
Processing mechanism, the surface that is used for processing described ultra-large type teflin ring comprises:
The first support bar is connected in described cylinder and is positioned at described ultra-large type teflin ring top; And
Processing components, be movably installed in the lower end of described the first support bar, described processing components is used for processing the surface of described ultra-large type teflin ring, and in three-dimensional coordinate, it is mobile in X-axis, Y-axis and Z-direction that described adjusting part is regulated described processing mechanism;
The 3rd motor is connected in described the second cylinder mobile in Y direction to drive described the second cylinder; And
Transmission component is arranged on the described workbench, and described transmission component is used for making described ultra-large type teflin ring rotation; And
Limit assembly is arranged on the described workbench, and described limit assembly is used for limiting described ultra-large type teflin ring distortion.
10. the preparation method of ultra-large type teflin ring as claimed in claim 9 is characterized in that, described limit assembly comprises:
Several external compression mechanisms are arranged on the described workbench and prop up the outer ring surface of described ultra-large type teflin ring;
Hold-down mechanisms in several are arranged on the described plummer and prop up the inner ring surface of described ultra-large type teflin ring; And
Hold-down mechanism on several is arranged on the described workbench and pushes down the upper surface of described ultra-large type teflin ring,
Wherein, described external compression mechanism, described interior hold-down mechanism and described upper hold-down mechanism all comprise:
The second support bar is fixed on the described plummer;
Elastic construction is arranged on described the second support bar; And
Compressing member props up the surface of described ultra-large type teflin ring, and described elastic construction is connected in described compressing member.
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| CN2013100325085A CN103072275A (en) | 2013-01-28 | 2013-01-28 | Preparation method of ultra-large polytetrafluoroethylene seal ring |
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| CN2013100325085A CN103072275A (en) | 2013-01-28 | 2013-01-28 | Preparation method of ultra-large polytetrafluoroethylene seal ring |
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| CN104527057A (en) * | 2014-12-10 | 2015-04-22 | 广东新志密封技术有限公司 | Method and equipment for processing polytetrafluoroethylene sealing ring |
| CN105563663A (en) * | 2015-12-18 | 2016-05-11 | 南京晨光集团有限责任公司 | Device used for scraping off and forming graphite seal ring on gas distribution valve |
| CN113459556A (en) * | 2021-05-13 | 2021-10-01 | 张争飞 | Self-adaptation size composite seal circle processingequipment for oil drilling |
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