CN205889876U - Rotation type pipe -expanding machine - Google Patents

Abstract

The utility model relates to a rotation type pipe -expanding machine belongs to and takes over flaring technical field, including fixed establishment and embedded in fixed establishment's shaping portion, shaping portion includes forming mechanism and pushing mechanism, forming mechanism is for the rotatable connection of pushing mechanism, but the setting of its shaping external diameter spreading, pushing mechanism arranges to butting forming mechanism, and the part extends to the inside telescopic setting of forming mechanism, through relative telescopic setting between pushing mechanism and the forming mechanism, will stretch into the inside step -by -step spreading of forming mechanism external diameter of pipeline, realize the progressively change to the internal diameter of pipeline to reach the purpose of pipeline flaring, because forming mechanism's external diameter in the forming process, through the step -by -step increase of pushing mechanism.

Description

A kind of rotary pipe-expanding machine

Technical field

This utility model is related to adapter enlarging technical field, and more specifically, more particularly, to one kind realizes pipe using mould The rotary pipe-expanding machine of road enlarging.

Background technology

Pipe fitting is applied extremely wide in daily productive life, in daily productive life, is socketed also more between pipe fitting Common, necessarily having one end between the pipe fitting of socket is narrow end, and one end is wide end, thus connecting after wide end is by narrow end fit Connect, and then the connection between pipe fitting or between pipe fitting and part, thus the length required for being expanded into.

Pipe-expanding machine is the common equipment of pipeline mouth of pipe processing and forming, has the characteristics that efficiency high, rhythm are fast, in processing and forming In widely use.The product connecting by pipe fitting typically will be needed to be attached using by way of socket, because this kind of pipeline exists It is just the consistent tubulose of integral radius after one-step forming, thus also need to carry out enlarging reprocessing to one end of pipeline further.Existing The enlarging flow process having the pipe-expanding machine in technology is first the mouth of pipe of pipeline to be socketed on pipe-expanding machine die head, thimble spreading die head Mold section thus the section tubular wall of the spreading mouth of pipe and die contacts, subsequently thimble is exited, die head subsequently restores to the original state, by workman Take off pipeline, and again will be socketed in mold section without die head spreading section tubular wall, then drive thimble spreading die head again Mold section, thus the section tubular wall of the spreading mouth of pipe and die contacts, so repeatedly until the tube wall of the mouth of pipe is in directly more all by spreading Big is cylindric.

China Patent No. cn201410230212.9, name is a kind of the special of Portable small-bore steel-plastics composite pipe pipe-expanding machine In profit, disclose following scheme: include hand-hydraulic mechanism and clamping device, steel-plastics composite pipe is fastened by clamping device, so Utilize hand-hydraulic mechanism drive ram afterwards, good using steel-plastics composite pipe ductility, the feature of imitative type punching press can be carried out, hydraulic pressure moves Push dynamic imitative type enlarging pressure head, realize expanding steel plastic compount pipe port according to the profile of imitative type pressure head.Although to a certain extent Improve the continuous ability to work of device, improve the efficiency of steel-plastics composite pipe installation, but postindustrial by imitative type punching press After pipeline enlarging, enlarging wall unevenness after its molding, residual stress is big, easily ruptures during follow-up UNICOM, with When, rely on the enlarging to pipeline for the hand-hydraulic mechanism realization, with the increase of its operations number, the precision after enlarging gradually drops Low, after its processing the concordance of part accuracy poor it is impossible to meet that required precision is high, the demand of production of mass.

Therefore, how to realize automatization's processing of pipe-expanding machine, improve flaring precision and working (machining) efficiency, and reduce hand labor Intensity is a technical problem urgently to be resolved hurrily.

Utility model content

The problems referred to above existing for prior art, the purpose of this utility model is to provide a kind of rotary pipe-expanding machine, expands After mouth molding, uniformly, residual stress is little, is able to ensure that and does not break during follow-up UNICOM for the enlarging Thickness Distribution after its molding Split, after its processing, the concordance of part accuracy very well, disclosure satisfy that required precision height, the demand of production of mass.

The purpose of this utility model be provide a kind of rotary pipe-expanding machine, include fixed mechanism be embedded in fixed mechanism Forming part, described forming part includes shaping mechanism and pushing mechanism, and described shaping mechanism is with respect to the rotatable company of pushing mechanism Connect, its expanding setting of molding external diameter, described pushing mechanism abuts against shaping mechanism arrangement, and extends partially into shaping mechanism Internal telescopic setting, described forming part also includes the lifting body of the product position height for adjusting pipeline, described top Rise the outside that mechanism is close to fixed part, the setting that can lift；By relative telescopic between pushing mechanism and shaping mechanism Setting, will stretch into shaping mechanism external diameter pipeline within spreading progressively, and realization is altered in steps to the internal diameter of pipeline, to reach The purpose of pipeline enlarging, because the external diameter of shaping mechanism is in forming process, by pushing mechanism increase progressively, i.e. forming machine The external diameter of structure is gradually to increase during rotating swollen type, pipeline in flaring process, the change of its wall thickness be one gradually The plastic deformation process becoming, after both having avoided pipeline enlarging molding, its wall unevenness, residual stress is big, the easily problem of rupture, The Local uniqueness to molding technique parameter can be realized in forming process again, to guarantee the concordance of part accuracy after processing, Can be good at being suitable for required precision height, the Production requirement of mass.

Preferably, described shaping mechanism and pushing mechanism are embedded on fixed mechanism, the fixation that two ends extend.

Preferably, in order to ensure become pipeline in flaring process, the uniformity of its wall thickness change, described pushing mechanism with become The fixation of type mechanism coaxial line.

Preferably, in order to realize the transmission of larger torque, reduce the space that drive disk assembly takies, described shaping mechanism runs through The side relative with open side on fixed mechanism, the direction being directed away from open side extends.

Preferably, described fixed mechanism includes support and front apron, and described support is adjacent both-side opening, and inside is machined with Storage cavity, described front apron is removably attachable to one end of support opening.

Preferably, the dismounting for the ease of forming part and maintenance, described support open side be along its length with width side To adjacent two side, described front apron is detachably mounted in the open side of width.

Preferably, in order to realize rotate shaping mechanism effectively separate with pushing mechanism, and realize accurately calibration and Fine setting, described fixed mechanism also includes the safety pin being disposed between shaping mechanism and pushing mechanism.

Preferably, described safety pin is adjustable for height is fixed on support.

Preferably, state shaping mechanism and include the enlarging assembly for molding and the servo motor driving the rotation of enlarging assembly, The connection of described servo motor and enlarging Component driver, by the drive of servo motor, drives the rotation of enlarging assembly it is ensured that pipeline In flaring process, internal diameter of the pipeline forms complete circular arc, so that it is guaranteed that after enlarging shape concordance.

Preferably, in order to realize the efficient matchings of rotating speed and moment of torsion between enlarging assembly and servo motor, described forming machine Structure also includes the reductor being folded between enlarging assembly and servo motor.

Preferably, described shaping mechanism also includes the power transmission shaft being connected by variable-speed motor and sheathed with servo motor driven The driving gear integrally fixed on power transmission shaft and driven gear, described driven gear and enlarging with driving gear linkage The fastening of assembly one, with this, the moment of torsion of rotation is exported by servo motor, passes to power transmission shaft after reductor, to drive Driving gear fixed thereto, thus driving driven gear jointly to rotate, drives, with this, the expansion being integrally fixed with driven gear The rotation of mouth component synchronization.

Preferably, in order to simplify the taking up room of drive mechanism of moment of torsion, improve the efficiency of power transmission further, described The setting that power transmission shaft is spaced with enlarging member parallel, described driven gear is fixed on enlarging assembly, is engaged with driving gear Fixing.

Preferably, described enlarging assembly includes enlarging die head, thimble, clutch shaft bearing, and described enlarging die head is by coaxial distribution Being put together of fan-shaped mold section activity, rotatable be connected with fixed part, the setting at described clutch shaft bearing and enlarging die head interval, Thimble is folded between enlarging die head and clutch shaft bearing, and the axial direction along enlarging die head, described thimble is telescopic and enlarging Die head connects.

Preferably, the described thimble setting coaxial with enlarging die head, with this, by the thimble being flexibly connected, can be by polylith The die head distending that mold section pieces together, causes the external diameter of enlarging die head to change, so that matched during rotary operation The internal diameter of pipeline change, realize the purpose to internal diameter of the pipeline enlarging.

Preferably, described thimble extends partially into enlarging die head, and the setting that extension external diameter reduces, and forms one with this The mating surface of individual fairing so that enlarging die head external diameter under thimble effect increase progressively it is ensured that in flaring process, duct wall Thickness can slowly, uniformly change.

Preferably, in order to whole system run smooth, reduce the friction in transmission process, described enlarging assembly also includes It is used for injecting the first oil syringe of lubricating oil, described first oil syringe is set in the top of clutch shaft bearing, is connected with clutch shaft bearing Fixation.

Preferably, in order to realize fixing further to clutch shaft bearing, it is to avoid lax, the institute that in rotary course, vibration leads to State the first oil syringe bottom and be processed into the arc depression caving in, top be stand upside down trapezoidal, and inside be machined with run through upper end and The inner passage of lower end.

Preferably, described driven gear includes being set in the gear outer ring of enlarging assembly outer peripheral face, and is resisted against outside gear In circle end side surface, along the axially extended second bearing of enlarging assembly, the fastening of described gear outer ring and enlarging assembly one.

Preferably, in order to realize fixing further to second bearing, it is to avoid lax, the institute that in rotary course, vibration leads to State driven gear and also wrap the second oil syringe injecting lubricating oil for second bearing, described second oil syringe is set in second bearing The fixation of connection.

Preferably, described driven gear also includes the camshaft bearing being connected on gear outer ring, and described camshaft bearing runs through Gear outer ring, and fastening in conjunction.

Preferably, in order to improve the ride comfort in transmission process, described shaping mechanism is also included for supporting fixed conveyor The connecting base of part, described connecting base includes the extension for being fastened together with reductor, and is connected with fixed part locking Linkage section.

Preferably, in order to reduce taking up room of installing and fixed part between, the extension of described connecting base and linkage section Vertical arrangement.

Preferably, the extension of described connecting base is connected to the tail end of linkage section, and extends down.

Preferably, in order to improve the frictional force in mechanokinetic transmission efficiency and reduction power transmission process, described one-tenth Type mechanism also includes the ball bearing being set on power transmission shaft.

Preferably, described ball bearing be two, driving gear is folded in middle fixation, effectively reduce transmission The moment of torsion that axle occurs in power transmission process.

Preferably, described pushing mechanism includes contiguous block and the molding of first piston cylinder and first piston cylinder drive connection The angled slide block of mechanism's conflict setting, described first piston cylinder is arranged on the outer side away from shaping mechanism for the fixed part, drivable Extend towards fixed part, described contiguous block is embedded in inside fixed part, is folded between first piston cylinder and angled slide block, and with the The telescopic connection of one piston cylinder, described angled slide block is connected with contiguous block away from one end of shaping mechanism；Further, angled slide block The drivable connection with the thimble in shaping mechanism.

Preferably, in order to timely make up the abrasion overweight in flare formation of thimble, revise thimble propulsion enlarging The stroke of die head, described pushing mechanism also includes stretching out the adjusting nut of stroke for adjusting angled slide block, and described adjusting nut sets Put the other side away from fixed part in first piston cylinder.

Preferably, grasp enlarging depth in order to real-time, described forming part also includes the row being connected on fixed part Process control mechanism.

Preferably, described range controlling mechanism includes stroke display module and stroke calibration assemblies, described stroke display group Part is arranged in the side of fixed part, extends along its length, and described stroke calibration assemblies are fixed on pushing mechanism, parallel to The axis of pushing mechanism extends.

Preferably, described display module includes connecting plate, scale grating, grating reading head, described connecting plate and the machine of promotion Structure is integrally fixed, and described sign grating is arranged on the outside of fixed part, and described grating reading head is folded in fixed part and promotion Between mechanism, and the fixation with connecting plate one.

Preferably, described stroke calibration assemblies include detection bar, proximity switch, detection head, and described detection bar one end is fixed In the fixing end of pushing mechanism, the axis direction of the parallel pushing mechanism of the other end being oppositely arranged extends, described proximity switch It is fixed on pushing mechanism, and its end extends towards detection bar, described detection head is set in detection bar, mobilizable solid Fixed.

Preferably, easily shaping mechanism is aligned in order to realize the product with pipeline, solves to manage in prior art Road is difficult to a difficult problem coaxial with flare formation part, and described forming part also includes the top of the product position height for adjusting pipeline Rise mechanism, described lifting body is close to the outside of fixed part, the setting that can lift.

Preferably, described lifting body includes the pressing plate for supporting and fixing the lifting of whole mechanism, and is used for supporting system The supporting table of part, and the lifting platform of lifting power is provided, the end side surface setting of the laminating fixed part of described pressing plate vertical, described Supporting table extends perpendicular to pressing plate, the direction being directed away from fixed part, and described lifting platform is connected with pressing plate by support, parallel to Pressing plate upwardly extends, and telescopic fixes with supporting table.

Preferably, in order to provide enough support strengths and stability, described supporting table includes the one of parallel interval setting Vertical is arranged with support, and the first fixed plate being horizontally fixed on support, described support vertical, in pressing plate, is directed away from fixing The direction in portion extends.

Preferably, described first fixed plate is shelved on cantilever tip.

Preferably, the product being fixed on for convenience in supporting table accurately realizes the calibration of position, and described supporting table is also Including the second fixed plate being disposed in the first fixed plate, and it is folded between the first fixed plate and the second fixed plate One guide rail, described first guide rail parallel extends in the axis direction of pushing mechanism.

Preferably, described lifting platform includes handwheel, lifting groove, link, the first nut bracket, the second nut bracket, institute State the screw mandrel that handwheel is integrally fixed and run through link and lifting groove, the liftable fixation with supporting table, described inside is embedded with solid Surely the first nut bracket of nut and being fixed on of the second nut bracket parallel interval is had to lift groove towards on the side of pressing plate, institute Stating link is in integrally u-shaped, and its bottom offers through hole, and both sides are fixed with the bottom lifting groove.

Preferably, for convenience the screw mandrel fixing with handwheel one is finely adjusted, the breach of described link is towards pressure Plate is arranged.

Preferably, for the ease of measuring the rotating speed of screw mandrel and realizing quick speed governing, and timely judge the side rotating To described lifting platform also includes the rotary encoder being folded between link and handwheel.

Preferably, for the ease of realizing the Based Intelligent Control of automatization, described lifting body also includes driving supporting table position The first drive component changing, described first drive component part stretches into inside supporting table, the fixation driving with supporting table.

Preferably, described first drive component includes connecting seat, the second fixed seat, the first driving cylinder, described connecting seat bag Include vertically disposed first level section and the first vertical section, the fixation of described first level section and the first vertical section one, described First level section part is folded between the first fixed plate and the second fixed plate, and the fixation with the second fixed plate one, described First vertical section extends down, and described second fixed seat is fixed in the first fixed plate, and described first driving cylinder is folded in second Between fixed seat and connecting seat, and the fixation with the first vertical section driving of connecting seat.

Preferably, the fast assembling-disassembling for the ease of product and replacing, the efficiency of lifting flare formation operation, described forming part Also include the tool mechanism for fixing product, described tool mechanism is fixed on the top of lifting body, can with respect to fixed part The fixation driving.

Preferably, described tool mechanism includes tool base plate, the moulds of industrial equipment being fixed in tool base plate and the second driving Assembly, the mobilizable upper end being fixed on tool base plate of described moulds of industrial equipment, extend upward, be machined with for the system of receiving inside it The internal cavities of part, described second drive component is fixed in tool base plate, and the connection driving with moulds of industrial equipment.

Preferably, described second drive component includes the second driving cylinder and fixed pedestal, the activity of described second driving cylinder Fixed pedestal is run through at end, the connection driving with moulds of industrial equipment, and described fixed pedestal includes vertically disposed second horizontal segment and the Two vertical sections, the fixation of described second horizontal segment and the second vertical section one, described second horizontal segment and tool base plate one Fixing, described second vertical section extends upward.

Preferably, the second vertical section of described fixed pedestal is located at the end away from tool base plate direction for second horizontal segment.

Preferably, after in order to avoid product position correction, stress in flare formation and there is the change of position, described Tool mechanism also includes the extruding clamp for limiting product displacement, and described extruding clamp bottom is consolidated with moulds of industrial equipment one Fixed, top is releasedly locked on product.

Preferably, described extruding clamp includes the clamp fixed seat being connected with moulds of industrial equipment and the fastening of clamp fixed seat connects The clamp base connecing and the clamp press strip being flexibly connected with clamp base and gripper handles and for connecting clamp press strip and The clamp connecting rod of gripper handles.

Preferably, described clamp fixed seat bottom is dismountable with moulds of industrial equipment is fastened together, its top and clamp bottom Seat is bolted connection, and described clamp press strip and gripper handles tail end are hinged with clamp base respectively, and interlaced arrangement, institute The two ends stating clamp connecting rod are hinged with clamp press strip and gripper handles respectively, with clamp press strip, gripper handles and clamp base altogether With one quadric chain of composition.

Preferably, in order to improve the efficiency of calibration motion, described tool mechanism also includes being folded in tool base plate and frock Slide guide assembly between mould.

Preferably, described slide guide assembly includes axially extended second guide rail of parallel second drive component and is set in second Freely slidable guide groove on guide rail, described guide groove and moulds of industrial equipment are integrally fixed.

Preferably, described slide guide assembly also includes the locating part being fixed in tool base plate, and described locating part has upwards Raised extension.

In embodiment of the present utility model, by telescopic setting relative between pushing mechanism and shaping mechanism, will Stretch into shaping mechanism external diameter within pipeline spreading progressively, realize being altered in steps of the internal diameter to pipeline, to reach pipeline expansion The purpose of mouth, because the external diameter of shaping mechanism is in forming process, by pushing mechanism increase progressively, that is, shaping mechanism is outer Footpath is gradually to increase during rotating swollen type, and in flaring process, the change of its wall thickness is the soft of a gradual change to pipeline Property deformation process, after both having avoided pipeline enlarging molding, its wall unevenness, residual stress is big, the easily problem of rupture, and permissible The Local uniqueness to molding technique parameter is realized in forming process, to guarantee the concordance of part accuracy after processing, can be very Good is suitable for required precision height, the Production requirement of mass.

Brief description

The Figure of description constituting the part of the application is used for providing further understanding to of the present utility model, this practicality New schematic description and description is used for explaining this utility model, does not constitute to improper restriction of the present utility model. In the accompanying drawings:

Fig. 1 shows a kind of flaring machine schematic perspective view realized according to this utility model embodiment；

Fig. 2 shows and a kind of is applied to the vertical of flaring machine rotating mechanism according to what this utility model embodiment realized Body schematic diagram；

Fig. 3 shows and a kind of is applied to the vertical of flaring machine strainer according to what this utility model embodiment realized Body schematic diagram；

Fig. 4 shows and a kind of is applied to the vertical of flaring machine lifting body according to what this utility model embodiment realized Body schematic diagram；

Fig. 5 shows and a kind of is applied to the vertical of flaring machine fixed mechanism according to what this utility model embodiment realized Body schematic diagram；

Fig. 6 shows that the another kind realized according to this utility model embodiment is applied to flaring machine fixed mechanism Schematic diagram.

Specific embodiment

Below in conjunction with accompanying drawing, specific embodiment of the present utility model is described in detail.It should be appreciated that herein Described specific embodiment is merely to illustrate and explains this utility model, is not limited to this utility model.

For the ease of description, space relative terms can be used here, such as " ... on ", " ... top ", " in ... upper surface ", " above " etc., for describing as a device shown in the figure or feature and other devices or spy The spatial relation levied.It should be appreciated that space relative terms be intended to comprise except device in figure described by orientation Outside different azimuth in use or operation.For example, if the device in accompanying drawing is squeezed, it is described as " in other devices Part or construction above " or " other devices or construction on " device after will be positioned as " other devices or construction under Side " or " under other devices or construction ".Thus, exemplary term " ... top " can include " ... top " and " in ... lower section " two kinds of orientation.This device can also position (ratating 90 degrees or be in other orientation) by other different modes, and And respective explanations are made to space used herein above description relatively.

Refer to Fig. 1 to Fig. 6, Fig. 1 shows that a kind of flaring machine realized according to this utility model embodiment stands Body schematic diagram；Fig. 2 shows a kind of flaring machine rotating mechanism of being applied to realized according to this utility model embodiment Schematic perspective view；Fig. 3 shows that the one kind realized according to this utility model embodiment is applied to flaring machine strainer Schematic perspective view；Fig. 4 shows that the one kind realized according to this utility model embodiment is applied to flaring machine jack The schematic perspective view of structure；Fig. 5 shows that the one kind realized according to this utility model embodiment is applied to flaring machine and fixes The schematic perspective view of mechanism；Fig. 6 shows that the another kind realized according to this utility model embodiment is applied to flaring machine The schematic diagram of fixed mechanism.

As shown in figure 1, this utility model provides a kind of rotary pipe-expanding machine, including fixed mechanism 10 He of lateral opening Be embedded in the forming part of fixed mechanism 10, this forming part includes shaping mechanism 20 and pushing mechanism 30, shaping mechanism 20 with respect to The rotatable connection of pushing mechanism 30, its expanding setting of molding external diameter, pushing mechanism 30 abuts against shaping mechanism 20 and arranges, And extend partially into the internal telescopic setting of shaping mechanism 20, stretched by relative between pushing mechanism 30 and shaping mechanism 20 The setting of contracting, will stretch into shaping mechanism 20 external diameter pipeline within spreading progressively, and realization is altered in steps to the internal diameter of pipeline, To reach the purpose of pipeline enlarging, because the external diameter of shaping mechanism 20 is in forming process, by pushing mechanism 30 increasing progressively Plus, that is, the external diameter of shaping mechanism 20 be rotate swollen type during gradually increase, pipeline in flaring process, its wall thickness Change is the plastic deformation process of a gradual change, after both having avoided pipeline enlarging molding, its wall unevenness, and residual stress is big, pole Easily rupturable problem, can realize the Local uniqueness to molding technique parameter in forming process again, to guarantee product after processing The concordance of precision, can be good at being suitable for required precision height, the Production requirement of mass.

Specifically, shaping mechanism 20 and pushing mechanism 30 are embedded on fixed mechanism 10, the fixation that two ends extend, preferably Ground, in order to ensure becoming pipeline in flaring process, the uniformity of its wall thickness change, pushing mechanism 30 and shaping mechanism 20 coaxial line Fixation.In order to realize the transmission of larger torque, reduce the space that drive disk assembly takies, shaping mechanism 20 runs through fixed mechanism 10 The upper side relative with open side, the direction being directed away from open side extends.

In embodiment of the present utility model, as shown in figure 1, fixed mechanism 10 entirety is in cuboid profile, including support 11 and front apron 12, support 11 is adjacent both-side opening, and inside is machined with storage cavity, and front apron 12 is removably attachable to machine One end of seat 11 openings, further, the dismounting for the ease of forming part and maintenance, support 11 open side be along its length with Adjacent two side of width, front apron 12 is detachably mounted in the open side of width.In order to realize The shaping mechanism 20 of rotation is effectively separated with pushing mechanism 30, and realizes accurately calibration and fine setting, also includes interval setting Safety pin 13 between shaping mechanism 20 and pushing mechanism 30, further, safety pin 13 is adjustable for height to be fixed on On support 11.

As shown in Fig. 2 shaping mechanism 20 is included for the enlarging assembly 21 of molding and watching of driving enlarging assembly 21 rotation Take motor 22, the connection that servo motor 22 is driven with enlarging assembly 21, by the drive of servo motor 22, drive enlarging assembly 21 Rotation it is ensured that during pipeline enlarging, internal diameter of the pipeline forms complete circular arc, so that it is guaranteed that after enlarging shape concordance.Relatively Goodly, in order to realize the efficient matchings of rotating speed and moment of torsion between enlarging assembly 21 and servo motor 22, also include being folded in enlarging Reductor 23 between assembly 21 and servo motor 22.

Drive transmission can be various suitable forms and various suitable machine between enlarging assembly 21 and servo motor 22 Structure realizing, for example, in embodiment of the present utility model, by gear engagement side between enlarging assembly 21 and servo motor 22 Realizing the transmission of efficient moment of torsion, specifically, shaping mechanism 20 also includes driving even with servo motor 22 by variable-speed motor 23 formula The power transmission shaft 24 that connects and be set in the driving gear 25 integrally fix on power transmission shaft 24 and with driving gear 25 linkage from Moving gear 26, the fastening of this driven gear 26 and enlarging assembly 21 one.With this, the moment of torsion of rotation is exported by servo motor 22, Pass to power transmission shaft 24 by after reductor 23, to drive driving gear 25 fixed thereto, thus driving driven gear 26 altogether With rotating, drive the rotation of enlarging assembly 21 synchronization being integrally fixed with driven gear 26 with this.In order to simplify the biography of moment of torsion Taking up room of motivation structure, improves the efficiency of power transmission further, and further, power transmission shaft 24 is approximately flat with enlarging assembly 21 The setting of between-line spacing, driven gear 26 is fixed on enlarging assembly 21, the fixation engaged with driving gear 25.

In embodiment of the present utility model, as shown in Fig. 2 enlarging assembly 21 include enlarging die head 211, thimble 212, One bearing 213, enlarging die head 211 by being put together of fan-shaped mold section activity of multiple coaxial distributions, rotatable with fixed part 10 Connect, the setting that clutch shaft bearing 213 is spaced with enlarging die head 211, thimble 212 is folded in enlarging die head 211 and clutch shaft bearing Between 213, and the axial direction along enlarging die head 211, thimble 212 is telescopic to be connected with enlarging die head 211.Further, thimble 212 settings coaxial with enlarging die head 211.With this, by the thimble 212 being flexibly connected, the mould that polylith mold section can be pieced together 211 distendings, cause the external diameter of enlarging die head 211 to change, so that matched pipeline during rotary operation Internal diameter changes, and realizes the purpose to internal diameter of the pipeline enlarging.Preferably, thimble 212 extends partially into enlarging die head 211, and The setting that extension external diameter reduces, forms the mating surface of a fairing so that the external diameter of enlarging die head 211 is in thimble with this It is ensured that in flaring process, pipeline wall thickness can slowly, uniformly change for increase progressively under 212 effects.Further, in order to It is smooth that whole system is run, and reduces the friction in transmission process, also includes the first oil syringe 214 for injecting lubricating oil, This first oil syringe 214 is set in the top of clutch shaft bearing 213, the fixation connecting with clutch shaft bearing 213, in order to realize to first The fixing further of bearing 213, it is to avoid in rotary course vibration lead to lax, the first oil syringe 214 is in substantially outside " work " word Shape, the arc depression caving in is processed in bottom, and top is the trapezoidal of handstand, and inside is machined with the inside running through top and bottom Passage, after lubricating oil is introduced through upper end, the matched clutch shaft bearing of pilot flow direction 213.

Driven gear 26 can with using various suitable forms and enlarging assembly 21 fixing it is preferable that as shown in Fig. 2 from Moving gear 26 ring set, on enlarging assembly 21, is fastened together therewith, smoothly to provide the transmission of high pulling torque, specifically, In embodiment of the present utility model, driven gear 26 includes being set in the gear outer ring 261 of enlarging assembly 21 outer peripheral face, and against In the end side surface of gear outer ring 261, along the axially extended second bearing 262 of enlarging assembly 21, this gear outer ring 261 and enlarging The fastening of assembly 21 one.Further, also include driven gear 26 and also wrap the second note injecting lubricating oil for second bearing 262 Oily device 263, this second oil syringe 263 is set in the coconnected fixation of second bearing 262.Equally in order to realize to second bearing 262 fix further, it is to avoid in rotary course vibration lead to lax, the second oil syringe 263 is in substantially " work " word profile, bottom The arc depression caving in is processed at end, and top is the trapezoidal of handstand, and inside is machined with the inner passage running through top and bottom, After lubricating oil is introduced through upper end, the matched second bearing of pilot flow direction 262.In order to realize to bearing under big load Enlarging assembly 21 accurate phase of adjustment axis position, also include the camshaft bearing 264 being connected on gear outer ring 261, described Camshaft bearing 264 runs through gear outer ring 261, and fastening in conjunction.

In embodiment of the present utility model, in order to improve the ride comfort in transmission process, shaping mechanism 20 also includes using To support the connecting base 27 of fixed conveyor parts, connecting base 27 can be using various suitable structures it is preferable that connecting base 27 wraps Include the extension for being fastened together, and the linkage section being connected with fixed part 10 locking with reductor 23, further, in order to Reduce taking up room of installing and fixed part 10 between, the linkage section of connecting base 27 arrangement vertical with extension is it is preferable that hold in the mouth The extension of joint chair 27 is connected to the tail end of vertical plane, and extends down.

One kind preferred embodiment in, in order to improve mechanokinetic transmission efficiency and reduce power transmission process in Frictional force, shaping mechanism 20 also includes the ball bearing 28 being set on power transmission shaft 24, is changed by sheathed ball bearing 28 The friction of power transmission shaft 24 is rolling friction, effectively reduces the friction between power transmission shaft and support, improves power transmission shaft Service life.Further, ball bearing 28 is two, and driving gear 25 is folded in middle fixation, reducing effectively The moment of torsion that power transmission shaft 24 occurs in power transmission process.

Pushing mechanism 30 can be coordinated with being installed with fixed part 10 using various suitable forms, it is preferred that new in this practicality In the embodiment of type, pushing mechanism 30 includes drive division and pars contractilis, and this pars contractilis embeds the fixation that fixed part 10 drives, and drives Portion extends away from fixed part 10.Specifically, as shown in figure 3, pushing mechanism 30 includes first piston cylinder 31 and first piston cylinder 31 The contiguous block 32 of drive connection and the angled slide block 33 of shaping mechanism 20 conflict setting, this first piston cylinder 31 is arranged on fixed part 10 away from shaping mechanism 20 outer side, drivable extend towards fixed part 10, contiguous block 32 is embedded in inside fixed part 10, It is folded between first piston cylinder 31 and angled slide block 33, and the telescopic connection with first piston cylinder 31, angled slide block 33 is away from one-tenth One end of type mechanism 20 is connected with contiguous block 32.It is preferable that angled slide block 33 and shaping mechanism in embodiment of the present utility model The drivable connection of thimble 212 in 20, under the driving effect of first piston cylinder 31, by contiguous block 32, driving force is straight Connect and pass to angled slide block 33, with this, drive thimble 212 to shift to enlarging die head 211, drive the external diameter of enlarging die head 211 progressively Increase.Further, angled slide block 32 setting coaxial with thimble 212, with this, it can be avoided that in forming process, due to shearing The impact of stress, leads to dislocation or the bending of thimble 212.

On the basis of above-described embodiment, in a kind of specific embodiment, in order to timely make up the 212 of thimble The overweight abrasion of flare formation, revises the stroke that thimble 212 advances enlarging die head 211, and pushing mechanism 30 is also included for adjusting Angled slide block 33 stretches out the adjusting nut 34 of stroke, and away from fixed part 10 in addition this adjusting nut 34 is arranged on first piston cylinder 31 Side.Further, the convenience in order to adjust, adjusting nut 34 outer peripheral face is also machined with staggered shallow grooves.

In embodiment of the present utility model, as shown in figure 3, grasping enlarging depth in order to real-time, also include even It is connected on the range controlling mechanism 40 on fixed part 10, the trip controlling organization 40 feeds back shaping mechanism in real time by graduation apparatus 20 propelling stroke is it is ensured that the concordance of the dimensions of pipeline after flare formation.Range controlling mechanism 40 includes stroke and shows Show assembly 41 and stroke calibration assemblies 42, the trip display module 41 is arranged in the side of fixed part 10, prolongs along its length Stretch, stroke calibration assemblies 42 are fixed on pushing mechanism 30, the axis parallel to pushing mechanism 30 extends.Specifically, display group Part 41 includes connecting plate 411, scale grating 412, grating reading head 413, and wherein, connecting plate 411 is fixed into pushing mechanism 30 Integrally, indicate the outside that grating 412 is arranged on fixed part 10, grating reading head 413 is folded in fixed part 10 and pushing mechanism 30 Between, and the fixation with connecting plate 411 one.Grating reading head passes through the fixation of connecting plate and pushing mechanism 30 one, with Pushing mechanism 30 moves together, and scale grating 412 utilizes the measurement of optical principle, directly by the displacement of pushing mechanism 30 intuitively Feedback display, with this, can intuitively read the displacement of pushing mechanism 30, easily to realize to pipeline enlarging depth Control.Stroke calibration assemblies 42 include detection bar 421, proximity switch 422, detection head 423, and wherein, detection bar 421 one end is fixed In the fixing end of pushing mechanism 30, the axis direction of the parallel pushing mechanism of the other end being oppositely arranged 30 extends, proximity switch 422 are fixed on pushing mechanism 30, and its end extends towards detection bar 421, and detection head 423 is set in detection bar 41, can The fixation of activity.Pass through to adjust the distance between detection head 423 and proximity switch 422 with this, can accurately obtain promotion machine The position of adjusting nut 34 of structure 30 and stroke, it is thus possible to science, intuitively, quantify correction flare formation in The error occurring.

Easily shaping mechanism 20 is aligned in order to realize the product 100 with pipeline, solves pipeline in prior art It is difficult to a difficult problem coaxial with flare formation part it is preferable that in embodiment of the present utility model, also including for adjusting pipeline Product 100 position height lifting body 50, this lifting body 50 is close to the outside of fixed part 10, the setting that can lift. Lifting body 50 can adopt various suitable structures, it is preferred that lifting body 50 is arranged on shaping mechanism 20 from fixed part 10 The side that inner chamber extends, to reduce the occupation of land space of whole expanding device.Specifically, lifting body 50 include for supporting and The pressing plate 51 of fixation whole mechanism lifting, and it is used for supporting the supporting table 52 of product 100, and the lifting platform that lifting power is provided 53, the end side surface setting of the laminating fixed part 10 of this pressing plate 51 vertical, supporting table 52, perpendicular to pressing plate 51, is directed away from fixed part 10 direction extends, and lifting platform 53 is connected with pressing plate 51 by support, upwardly extends parallel to pressing plate 51, telescopic and support Platform 52 is fixing.

As shown in figure 4, in order to provide enough support strengths and stability, supporting table 52 includes the one of parallel interval setting Vertical is arranged with support 521, and the first fixed plate 522 being horizontally fixed on support 521, this support 521 perpendicular to pressing plate 51, The direction being directed away from fixed part 10 extends it is preferable that the first fixed plate 522 is shelved on support 521 top fixes.Further Ground, the product 100 being fixed on for convenience in supporting table 52 is accurately realized the calibration of position, is also included being disposed on first The second fixed plate 523 in fixed plate 522, and the first guide rail being folded between the first fixed plate 522 and the second fixed plate 523 524, this first guide rail 524 extends parallel to the axis direction of pushing mechanism 30.By the guiding of the first guide rail 524, can drive It is shelved on the second fixed plate 523 in the first fixed plate 522 along the axial direction of pushing mechanism 30, mobilizable arrangement, so that soon The prompt relative position adjusting between product 100 and shaping mechanism 20.

Lifting platform 53 can using various suitable shapes it is preferable that as shown in figure 4, lifting platform 53 include handwheel 531, Lifting groove 532, link 533, the first nut bracket 535, the second nut bracket 536, wherein, handwheel 531 is integrally fixed Screw mandrel runs through link 533 and lifting groove 532, the liftable fixation with supporting table 52, and inside is embedded with and is fixed with the first of nut Nut bracket 535 and being fixed on of the second nut bracket 536 parallel interval lift groove 532 towards on the side of pressing plate 51, connect Frame 533 is overall to be in u-shaped, and its bottom offers through hole, and both sides are fixed with the bottom lifting groove 532, further, right for convenience The screw mandrel fixing with handwheel 532 one is finely adjusted, and the breach of link 533 arranges towards pressing plate 51 it is preferable that link 533 upper end opens up jagged, is easy to add fixture in the lower end of the first nut bracket 535 embedded nut, for example, adds band Adjusting nut jaggy.With this, by rotation hand wheel 531, embed in the first nut bracket 535 and the second nut bracket 536 In the presence of nut, change the length that the screw mandrel fixing with handwheel 531 one deeply lifts in groove 532, thus, realize to support The adjustment of the height of platform 52.Preferably, for the ease of measuring the rotating speed of screw mandrel and realizing quick speed governing, and timely judge The direction of rotation, also includes the rotary encoder 534 being folded between link 533 and handwheel 531.

On the basis of above-described embodiment, in a kind of specific embodiment, for the ease of realizing the Based Intelligent Control of automatization, Also include driving the first drive component 54 of supporting table 52 position change, this first drive component 54 part stretches in supporting table 52 Portion, the fixation driving with supporting table 52.Specifically, the first drive component 54 includes connecting seat 541, the second fixed seat 542, first Driving cylinder 543, this connecting seat 541 includes vertically disposed first level section and the first vertical section, and first level section and first is erected The fixation of straight section one, first level section part is folded between the first fixed plate 522 and the second fixed plate 523, and with second Fixed plate 523 is integrally fixed, and the first vertical section extends down, and the second fixed seat 542 is fixed in the first fixed plate 522, the One driving cylinder 543 is folded between the second fixed seat 542 and connecting seat 541, and with connecting seat 541 first vertical section drive Fixing.With this, by the drive of the first driving cylinder 543, drive connection seat 541 drives the second fixed plate 523 to link together, thus The adjustment realizing the position to the product 100 being fixed in the second fixed plate 523 changes.

In embodiment of the present utility model, as shown in figure 5, the fast assembling-disassembling for the ease of product 100 and replacing, lifting The efficiency of flare formation operation, also includes the tool mechanism 60 for fixing product 100, and tool mechanism 60 is fixed on lifting body 50 top, with respect to the drivable fixation of fixed part 10.Tool mechanism 60 can using various suitable mechanisms it is preferable that In embodiment of the present utility model, tool mechanism 60 includes tool base plate 61, the moulds of industrial equipment being fixed in tool base plate 61 62 and second drive component 64, the mobilizable upper end being fixed on tool base plate 61 of moulds of industrial equipment 62, extend upward, its internal plus Work has the internal cavities for receiving product 100, and the second drive component 64 is fixed in tool base plate 61, and with moulds of industrial equipment 62 The connection driving.In the presence of the second drive component 64, moulds of industrial equipment 62 can be ordered about and move with respect to tool base plate 61, thus Drive the product 100 being fixed on moulds of industrial equipment 62 to move together, the quick adjustment to product 100 position is realized with this.Enter one Step ground, the second drive component 64 includes the second driving cylinder 641 and fixed pedestal 642, and the movable end of the second driving cylinder 641 runs through solid Determine pedestal 642, the connection driving with moulds of industrial equipment 62, fixed pedestal 642 includes vertically disposed second horizontal segment and second and erects The fixation of straight section, this second horizontal segment and tool base plate 61 one, this second vertical section extends upward.Preferably, fixed pedestal 642 the second vertical section is located at the end away from tool base plate 61 direction for second horizontal segment.

Preferably, after in order to avoid product 100 position correction, stress in flare formation and there is the change of position, Also include the extruding clamp 63 for limiting product 100 displacement, the fixation of this extruding clamp 63 bottom and moulds of industrial equipment 62 one, Top is releasedly locked on product 100.By the extruding clamp 63 being integrally fixed with moulds of industrial equipment 62, by product 100 Releasable it is fastened together with moulds of industrial equipment 62.Extruding clamp 63 can adopt various suitable shapes, specifically, extruding folder Pincers 63 include being connected with moulds of industrial equipment 62 clamp fixed seats 631 be fastenedly connected with clamp fixed seat 631 clamp base 632, And the clamp press strip 633 that is flexibly connected with clamp base 632 and gripper handles 634 and be used for connecting clamp press strip 633 and folder The clamp connecting rod 635 of pliers grip 634, wherein, clamp fixed seat 631 bottom is dismountable with moulds of industrial equipment 62 to be fastened together, Its top is bolted connection with clamp base 632, clamp press strip 633 and gripper handles 634 tail end respectively with clamp bottom Seat 632 is hinged, and interlaced arrangement, and the two ends of clamp connecting rod 635 are hinged with clamp press strip 633 and gripper handles 634 respectively, with folder Pincers press strip 633, gripper handles 634 and clamp base 632 collectively constitute a quadric chain.With this, by gripper handles 634 can drive the releasable locking of clamp press strip 633 against product 100 it is ensured that product 100 firm be fixed on moulds of industrial equipment 62 On.

Preferably, in order to improve the efficiency of calibration motion, also include being folded between tool base plate 61 and moulds of industrial equipment 62 Slide guide assembly 65, by the guiding of slide guide assembly 65, the product 100 being easy to be fixed on moulds of industrial equipment 62 efficiently realizes position The change put.Slide guide assembly 65 can be for various suitable shapes it is preferable that as shown in fig. 6, slide guide assembly 65 includes parallel the Axially extended second guide rail 651 of two drive components 64 and be set in freely slidable guide groove 652 on the second guide rail 651, should Guide groove 652 is integrally fixed with moulds of industrial equipment 62.It is preferred that also including the locating part 653 being fixed in tool base plate 61, this limit Position part 653 has the extension raising up, and further, the upwardly extending raised locating part 653 that is located at is away from tool base plate 61 tail end, by the locating part 653 being fixedly installed, can be effectively prevented from moulds of industrial equipment 62 and skid off along the second guide rail 651 The risk of tool base plate 61, overcomes the hidden danger that product during expanding drops from tool mechanism.

Although this utility model patent is open as above with preferred embodiment, it is not for limiting this utility model Patent, any those skilled in the art, in the spirit and scope without departing from this utility model patent, may be by above-mentioned taking off The methods and techniques content shown makes possible variation and modification to technical solutions of the utility model, therefore, every without departing from this The content of utility model patent technical scheme, according to this utility model patent technical spirit above example is made any Simple modification, equivalent variations and modification, belong to the protection domain of this utility model art solutions.

Claims (31)

1. a kind of rotary pipe-expanding machine, including fixed mechanism (10) with the forming part that is embedded in fixed mechanism (10), its feature exists In described forming part includes shaping mechanism (20) and pushing mechanism (30), and described shaping mechanism (20) is with respect to pushing mechanism (30) rotatable connection, its expanding setting of molding external diameter, described pushing mechanism (30) abuts against shaping mechanism (20) cloth Put, and extend partially into the internal telescopic setting of shaping mechanism (20), described forming part also includes the system for adjusting pipeline The lifting body (50) of part (100) position height, described lifting body (50) is close to the outside of fixed part (10), can lift Setting.

2. rotary pipe-expanding machine according to claim 1 is it is characterised in that described shaping mechanism (20) and pushing mechanism (30) it is embedded on fixed mechanism (10), the fixation that two ends extend.

3. rotary pipe-expanding machine according to claim 1 and 2 is it is characterised in that described pushing mechanism (30) and forming machine The fixation of structure (20) coaxial line.

4. rotary pipe-expanding machine according to claim 3 is it is characterised in that described shaping mechanism (20) runs through fixed mechanism (10) the upper side relative with open side, the direction being directed away from open side extends.

5. rotary pipe-expanding machine according to claim 3 is it is characterised in that described fixed mechanism (10) includes support (11) With front apron (12), described support (11) is adjacent both-side opening, and inside is machined with storage cavity, and described front apron (12) is removable The one end being connected to support (11) opening unloaded.

6. rotary pipe-expanding machine according to claim 5 is it is characterised in that described support (11) open side is along length side To with two width adjacent sides, described front apron (12) is detachably mounted to the open side of width On.

7. rotary pipe-expanding machine according to claim 5 is it is characterised in that described fixed mechanism (10) also includes interval sets Put the safety pin (13) between shaping mechanism (20) and pushing mechanism (30).

8. rotary pipe-expanding machine according to claim 7 is it is characterised in that described safety pin (13) is adjustable for height solid It is scheduled on support (11).

9. rotary pipe-expanding machine according to claim 1 is it is characterised in that described shaping mechanism (20) is included for molding Enlarging assembly (21) and drive enlarging assembly (21) servo motor (22) that rotates, described servo motor (22) and enlarging group The connection that part (21) drives.

10. rotary pipe-expanding machine according to claim 9 is it is characterised in that described shaping mechanism (20) also includes sandwiched Reductor (23) between enlarging assembly (21) and servo motor (22).

11. rotary pipe-expanding machines according to claim 10 are it is characterised in that described shaping mechanism (20) also includes passing through The power transmission shaft (24) of variable-speed motor (23) and servo motor (22) drive connection and the master being set in one fixation on power transmission shaft (24) Moving gear (25) and the driven gear (26) linking with driving gear (25), described driven gear (26) and enlarging assembly (21) fastening of one.

12. rotary pipe-expanding machines according to claim 11 are it is characterised in that described power transmission shaft (24) and enlarging assembly (21) setting of parallel interval, described driven gear (26) is fixed on enlarging assembly (21), engages with driving gear (25) Fixing.

13. rotary pipe-expanding machines according to any one of claim 9 to 12 are it is characterised in that described enlarging assembly (21) Including enlarging die head (211), thimble (212), clutch shaft bearing (213), described enlarging die head (211) is by the flat back die of coaxial distribution Lobe activity be put together, rotatable is connected with fixed part (10), described clutch shaft bearing (213) and enlarging die head (211) interval Setting, thimble (212) is folded between enlarging die head (211) and clutch shaft bearing (213), and along enlarging die head (211) Axially, described thimble (212) is telescopic to be connected with enlarging die head (211).

14. rotary pipe-expanding machines according to claim 13 are it is characterised in that described thimble (212) and enlarging die head (211) coaxial setting.

15. rotary pipe-expanding machines according to claim 13 are it is characterised in that described thimble (212) extends partially into expansion Mouth die head (211), and the setting that extension external diameter reduces.

16. rotary pipe-expanding machines according to claim 13 it is characterised in that described enlarging assembly (21) also include for First oil syringe (214) of injection lubricating oil, described first oil syringe (214) is set in the top of clutch shaft bearing (213), with the The fixation that one bearing (213) connects.

17. rotary pipe-expanding machines according to claim 16 are it is characterised in that described first oil syringe (214) bottom adds The arc depression that work one-tenth caves in, top is the trapezoidal of handstand, and inside is machined with the inner passage running through top and bottom.

18. rotary pipe-expanding machines according to claim 11 are it is characterised in that described driven gear (26) includes being set in The gear outer ring (261) of enlarging assembly (21) outer peripheral face, and be resisted against in gear outer ring (261) end side surface, along enlarging assembly (21) fastening of axially extended second bearing (262), described gear outer ring (261) and enlarging assembly (21) one.

19. rotary pipe-expanding machines according to claim 18 are it is characterised in that described driven gear (26) also wraps as second Bearing (262) injects second oil syringe (263) of lubricating oil, and described second oil syringe (263) is set in second bearing (262) The fixation of connection.

20. rotary pipe-expanding machines according to claim 18 are it is characterised in that described driven gear (26) also includes connecting One of camshaft bearing (264) on gear outer ring (261), described camshaft bearing (264) runs through gear outer ring (261), and with The fastening of body.

21. rotary pipe-expanding machines according to claim 10 it is characterised in that described shaping mechanism (20) also include for Support fixed conveyor parts connecting base (27), described connecting base (27) include for prolonging that reductor (23) is fastened together Stretch section, and the linkage section being connected with fixed part (10) locking.

22. rotary pipe-expanding machines according to claim 21 it is characterised in that the linkage section of described connecting base (27) with prolong Stretch the vertical arrangement of section.

23. rotary pipe-expanding machines according to claim 22 are it is characterised in that the extension of described connecting base (27) connects In the tail end of linkage section, and extend down.

24. rotary pipe-expanding machines according to claim 11 it is characterised in that described shaping mechanism (20) also include sheathed Ball bearing (28) on power transmission shaft (24).

25. rotary pipe-expanding machines according to claim 24, will it is characterised in that described ball bearing (28) is two Driving gear (25) is folded in middle fixation.

26. rotary pipe-expanding machines according to claim 1 are it is characterised in that described pushing mechanism (30) inclusion first is lived The contiguous block (32) of plug cylinder (31) and first piston cylinder (31) drive connection and the angled slide block of shaping mechanism (20) conflict setting (33), described first piston cylinder (31) is arranged on the outer side away from shaping mechanism (20) for the fixed part (10), drivable direction Fixed part (10) extends, and described contiguous block (32) is embedded in fixed part (10) inside, is folded in first piston cylinder (31) and ejection Between block (33), and the telescopic connection with first piston cylinder (31), described angled slide block (33) is away from the one of shaping mechanism (20) End is connected with contiguous block (32).

27. rotary pipe-expanding machines according to claim 26 it is characterised in that described pushing mechanism (30) also include for Adjust angled slide block (33) and stretch out the adjusting nut (34) of stroke, described adjusting nut (34) be arranged on first piston cylinder (31) away from The other side of fixed part (10).

28. rotary pipe-expanding machines according to claim 1 are it is characterised in that described forming part also includes being connected to fixation Range controlling mechanism (40) in portion (10).

29. rotary pipe-expanding machines according to claim 28 are it is characterised in that described range controlling mechanism (40) includes row Journey display module (41) and stroke calibration assemblies (42), described stroke display module (41) is arranged in the side of fixed part (10), Extend along its length, described stroke calibration assemblies (42) are fixed on pushing mechanism (30), parallel to pushing mechanism (30) Axis extend.

30. rotary pipe-expanding machines according to claim 29 are it is characterised in that described display module (41) includes connecting plate (411), scale grating (412), grating reading head (413), described connecting plate (411) and pushing mechanism (30) are integrally fixed, The described grating (412) that indicates is arranged on the outside of fixed part (10), described grating reading head (413) be folded in fixed part (10) with Between pushing mechanism (30), and the fixation with connecting plate (411) one.

31. rotary pipe-expanding machines according to claim 29 are it is characterised in that described stroke calibration assemblies (42) include inspection Measuring staff (421), proximity switch (422), detection head (423), described detection bar (421) one end is fixed on consolidating of pushing mechanism (30) Fixed end, the axis direction of the parallel pushing mechanism of the other end being oppositely arranged (30) extends, and described proximity switch (422) is fixed on On pushing mechanism (30), and its end extends towards detection bar (421), and described detection head (423) is set in detection bar (41), Mobilizable fixation.