CN207479402U

CN207479402U - A kind of clamping device of pipe expander

Info

Publication number: CN207479402U
Application number: CN201721579632.3U
Authority: CN
Inventors: 何军涛
Original assignee: Zhuji Vertical And Horizontal Cold And Warm Accessories Co Ltd
Current assignee: Zhuji Vertical And Horizontal Cold And Warm Accessories Co Ltd
Priority date: 2017-11-23
Filing date: 2017-11-23
Publication date: 2018-06-12
Anticipated expiration: 2027-11-23

Abstract

The utility model discloses a kind of clamping devices of pipe expander, it is related to branch pipe process equipment, for solving the problems, such as that existing pipe expander flaring length is inconsistent, including carrying the lower module of lower groove, the upper module with upper groove, the regulating mechanism for being set to lower module side, regulating mechanism includes adjustment seat, the adjusting screw rod being threadedly connected in adjustment seat, is rotationally connected with adjustment disk of the adjusting screw rod on one end of lower module, is fixed on adjustment disk back to the mandril on one end of adjusting screw rod, and the one end of mandril far from adjustment disk is embedded in lower groove；The utility model has the following advantages and effect：This programme utilizes new mechanical structure, and regulating mechanism can form copper pipe and support, copper pipe is made to be not easy to be pushed by pipe expander, copper pipe is enable to expand the length for and setting, so as to achieve the purpose that improve product quality stability；And the expander length of copper pipe can be adjusted by mandril, so as to allow the operator to that conveniently expander length is adjusted.

Description

A kind of clamping device of pipe expander

Technical field

The utility model is related to branch pipe process equipment, more particularly to a kind of clamping device of pipe expander.

Background technology

Common accessory when branch pipe is refrigeration equipment installation, it is mainly combined by disagreement connector, branched pipe and header It forms, in order to connect when facilitates welding, it will usually by one end of branched pipe or header by being flared or necking, branch pipe be made to exist It is conveniently inserted into refrigerating fluid return duct during installation, therefore usually requires to use pipe expander in the production process kind of branch pipe.

At present, Authorization Notice No. 205324515U, authorized announcement date are that the Chinese utility model of 2016.06.22 discloses The intelligent pressing device of automatic tube expander a kind of, upper die, driving upper die including lower die, right over lower die The driving mechanism for compressing and material jacking mechanism of up and down motion, the side of the lower die for input terminal and with the output terminal of feeding device Docking, the opposite side of the lower die are docked for output terminal and with doffer, and the lower die is equipped with semicircular recessed Slot, the upper die are equipped with semicircular upper groove, and upper groove cooperatively forms cylindrical cavity with lower groove；It is described recessed The both sides of slot are equipped with for sensing the inductive probe whether material falls into lower groove, and the inductive probe is connect with controller, institute Controller is stated to connect with driving mechanism for compressing and liftout driving mechanism respectively.

The intelligent pressing device of automatic tube expander as described above, when use, copper pipe to be flared was rolled down to via reclaiming plate In lower groove on lower die, then driving mechanism for compressing driving upper die pushes, and copper pipe is pressed on lower die, then flat Moving driving cylinder pushes expansion head to be laterally embedded into the nozzle of copper pipe, during expanding head and persistently promoting, due to expanding The expansion effect of head, makes the diameter of copper pipe become larger, so as to complete the process of expander, but this pressing device is in the process used Middle discovery, copper pipe are susceptible to offset during being tumbled from reclaiming plate so that copper pipe exposes after rolling into every time in lower groove Be different from the length outside lower groove, and expand head its stroke under the promotion of driven in translation cylinder be it is fixed, thus The length that different copper pipes is expanded is caused to be different from, so as to cause unstable product quality.

Utility model content

The purpose of this utility model is to provide a kind of clamping device of pipe expander, and the flaring length of copper pipe can be adjusted Section, makes the flaring length of copper pipe be consistent substantially, so as to achieve the purpose that improve product quality stability.

The above-mentioned technical purpose of the utility model technical scheme is that：A kind of clamping of pipe expander Device, including carrying the lower module of lower groove, by the way that cylinder liftable is driven to be set on pipe expander and carries the upper of upper groove Module, be set to the lower module side and for adjust copper pipe flaring length regulating mechanism, the upper module and it is described under The clamp port for clamping copper pipe is formed between module, the regulating mechanism includes being set to lower module far from the first side of expander Adjustment seat, be threadedly connected in adjustment seat and length direction is parallel to the adjusting screw rod of horizontal direction, is rotationally connected with adjusting Adjustment disk of the screw rod on one end of lower module is fixed on the adjustment disk back to the mandril on one end of adjusting screw rod, institute The one end of mandril far from adjustment disk is stated to be embedded in lower groove.

By using said program, when needing to be flared copper pipe, copper pipe is put into lower groove first, and make copper Pipe is inconsistent with end face of the mandril far from adjustment disk one end, and during copper pipe is placed, operating personnel can cross rotation and adjust Screw rod makes adjusting screw rod that adjustment disk and the mandril being fixed on adjustment disk be driven to be transported towards the side closer or far from die holder It is dynamic, and then adjust the length that mandril is located in lower groove；Since copper pipe is inconsistent with mandril, and the length of lower groove and upper groove It is constant, therefore mandril is located at the variation that the variation of length in lower groove can cause copper pipe to be exposed to the outer length of lower groove, and The length that copper pipe is exposed to outside lower groove is longer, then the flaring length of copper pipe is also longer, therefore can be according to this case to copper pipe Flaring length be adjusted；After by the flaring length adjustment of copper pipe to the value needed, make upper mold by starting driving motor Group pushes, and clamps copper pipe together with lower module, the expander head in subsequent pipe expander pipe expander stretch into copper pipe to copper pipe into Row expands, and upper module and lower module can limit the shaking of copper pipe at this time, and mandril can limit copper pipe along recessed slot length side To displacement, copper pipe is made not allow to be also easy to produce offset during flaring so that copper pipe can expand the length for and setting, from And achieve the purpose that improve product quality stability.

The utility model is further arranged to：It is threadedly coupled on the adjusting screw rod and is useful for adjusting screw rod being fixed on Locking member in adjustment seat, the end face of the locking member side are pushed against in adjustment seat.

By using said program, when adjusting mandril to the position of needs, by twisting locking member, support locking member Tightly in adjustment seat, since adjusting screw rod is threadedly connected in adjustment seat, and locking member is threadedly connected on adjusting screw rod, therefore After locking member is pushed against in adjustment seat, the extruding force generated between adjustment seat and locking member can draw adjusting screw rod to both ends It pulls, the screw thread on adjusting screw rod is made to be pushed against on the screw thread adjusted in threaded hole, adjusting screw rod is made not allow to be also easy to produce rotation, so as to The position of mandril is less likely to occur to change.

The utility model is further arranged to：The circle being caught in for convenient wrench is offered on the side wall of the locking member Arc slot.

By using said program, the arc groove on locking member side wall can be embedded in for the tool of spanner etc, make operation Personnel can borrow power during locking member is twisted by arc groove, so as to achieve the purpose that conveniently to twist locking member.

The utility model is further arranged to：The lower module includes die holder, is opened in the die holder close to institute The lower caulking groove on the end face of module side, the lower clamp formwork being embedded in the lower caulking groove are stated, the lower groove is opened in described Lower clamp formwork is provided on the die holder lower clamp formwork being fixed on die holder back on the end face of die holder side The first fixation kit.

By using said program, using the composite structure of modular so that lower module can be according to copper pipe diameter specifications Difference, lower clamp formwork is replaced, lower clamp formwork is enable to adapt to the installation of different-diameter copper pipe, so as to make it is this clamp dress Put the scope of application with bigger.

The utility model is further arranged to：The die holder back to offer on the end face of the adjustment disk side with The lower retaining groove of lower caulking groove connection, under the lower clamp formwork is fixed on the side wall far from adjustment disk one end for being embedded in lower retaining groove Block.

By using said program, since the pipe expander on pipe expander is needed when carrying out expander to copper pipe by expander head The inner cavity of embedded copper pipe makes the bore of copper pipe generate expansion, therefore during expander head insertion copper pipe inner cavity by squeezing Copper pipe one can be applied to and be directed away from the cephalomotor driving force of expander, and due to copper pipe be by upper module and lower module come Fixed position, therefore pipe expander is applied to the motive force of copper pipe and can be transmitted on lower clamp formwork, easily causes lower clamp formwork under It is produced relative sliding between die holder, and after there is provided lower retaining groove and lower block, after the lower retaining groove of block insertion instantly is interior, due under Block is contradicted in die holder on the side wall of pipe expander side, therefore the side wall that die holder is located in lower retaining groove can limit Lower clamp formwork slips after being generated under the promotion of expander head so that copper pipe is not easy that lower clamp formwork is followed to slip afterwards together, and copper pipe is enable to expand The length for and setting is filled, so as to achieve the purpose that further improve product quality stability.

The utility model is further arranged to：First fixation kit includes being opened on the side wall of the die holder And first threaded hole adjacent with the lower retaining groove, the first bolt for being threadedly connected in first threaded hole, described first Bolt passes through one end of the first threaded hole to be pushed against on the side wall of lower clamp formwork.

By using said program, after the first bolt is pushed against on the side wall of lower clamp formwork, the first bolt connects with lower clamp formwork The frictional force generated when tactile can limit movement of the lower clamp formwork on die holder, make lower clamp formwork be not easy in the process of work from Deviate from lower caulking groove on die holder, so as to achieve the purpose that fixed lower clamp formwork.

The utility model is further arranged to：The upper module includes upper mold seat, is opened in the upper module under Upper embedded groove on the end face of module side, the upper clamp formwork being embedded in the upper embedded groove, the upper groove are opened in the upper folder Mould is provided on the upper mold seat for upper clamp formwork to be fixed on upper mold seat back on the end face of upper mold seat side Two fixation kits.

By using said program, cooperation can be formed with lower module after upper module is also configured to modularization so that behaviour Make personnel when replacing lower clamp formwork, upper clamp formwork can be replaced together so that upper clamp formwork complete can coordinate with lower clamp formwork, make The clamping of copper pipe is more stablized, so as to which copper pipe be made not allow more to be also easy to produce shaking during expander.

The utility model is further arranged to：The upper mold seat back to offer on the end face of the adjustment disk side with The upper retaining groove of upper embedded groove connection, the upper clamp formwork are fixed with to be embedded in upper retaining groove on the side wall far from adjustment disk one end Block.

By using said program, the matching relationship between die holder and lower clamp formwork is similar, the upper retaining groove on upper mold seat For for the upper stopper insertion on upper clamp formwork, after upper stopper is embedded in upper retaining groove, upper mold seat to be located at the side wall energy in upper retaining groove Enough blocking upper clamp formworks move under the promotion of pipe expander towards close to the side of adjustment disk, and upper clamp formwork is made to be not easy and upper mold seat Between generate relative displacement so that copper pipe is not allowed to slip after being also easy to produce so that copper pipe can expand the length for setting, so as to reach The purpose further to improve product quality stability.

The utility model is further arranged to：Second fixation kit includes being opened on the side wall of the upper mold seat And second threaded hole adjacent with the upper retaining groove, the second bolt for being threadedly connected in second threaded hole, described second Bolt passes through one end of the second threaded hole to be pushed against on the side wall of upper clamp formwork.

By using said program, when the second bolt is pushed against on the side wall of upper clamp formwork, the second bolt can be pushed Clamping is pushed against on the side wall that upper mold seat is located in upper embedded groove, and upper clamp formwork can be fixed on by upper mold seat and the second bolt at this time On die holder, upper clamp formwork is made to be not easy to fall out of upper embedded groove under gravity, so as to achieve the purpose that fixed upper clamp formwork.

The utility model is further arranged to：The adjustment disk includes the disk body being rotationally connected on adjusting screw rod and consolidates Due to the disk body back to the connecting stud on one side end face of adjusting screw rod, the mandril is threadedly connected to the connecting stud On.

By using said program, since upper clamp formwork with lower clamp formwork needs to be replaced according to the diameter specifications of copper pipe, because This makes mandril that can carry out dismounting and change so that upper clamp formwork and lower clamp formwork are more after mandril and adjustment disk are set as threaded connection After changing different sizes, mandril can also replace with the size to match with upper clamp formwork and lower clamp formwork, and then copper pipe is made to exist Mandril can play copper pipe better supporting role during flaring.

In conclusion the utility model has the advantages that：

1. regulating mechanism can form copper pipe and support, copper pipe is made to be not easy during being flared by pipe expander It pushes, copper pipe is enable to expand the length for and setting, so as to achieve the purpose that improve product quality stability；And operator Member can adjust the length that copper pipe is exposed to outside lower groove, and then adjust copper by adjusting length of the mandril in lower groove The expander length of pipe, so as to allow the operator to that conveniently expander length is adjusted；

2. knockdown upper module and lower module, enable clamping device to be replaced at any time according to the variation of copper pipe diameter specifications The upper clamp formwork and lower clamp formwork to match with the diameter of copper pipe, and then enable clamping device preferably limit copper in clamping copper pipe Pipe generates shaking, so as to achieve the purpose that further improve product quality stability；

3. enable mandril according to upper clamp formwork and lower folder by the way of connecting stud connection between adjustment disk and mandril Mandril is replaced in the variation of mould size, enable the size of mandril with it is recessed on the upper groove and lower clamp formwork on upper clamp formwork Slot matches, so that mandril preferably can play the role of support to copper pipe.

Description of the drawings

Fig. 1 is the overall structure figure of pipe expander；

Fig. 2 is the overall structure figure of the present embodiment clamping device；

Fig. 3 is the structure diagram of the present embodiment regulating mechanism.

In figure：1st, rack；2nd, pipe expander；21st, expander head；3rd, lower module；31st, die holder；311st, lower retaining groove；32nd, under Caulking groove；33rd, lower clamp formwork；331st, lower block；332nd, lower groove；4th, upper module；41st, upper mold seat；411st, upper retaining groove；42nd, upper embedded groove； 43rd, upper clamp formwork；431st, upper stopper；432nd, upper groove；5th, regulating mechanism；51st, adjustment seat；511st, threaded hole is adjusted；52nd, spiral shell is adjusted Bar；521st, handwheel；53rd, adjustment disk；531st, disk body；532nd, connecting stud；54th, mandril；6th, the first fixation kit；61st, the first spiral shell Pit；62nd, the first bolt；7th, the second fixation kit；71st, the second threaded hole；72nd, the second bolt；8th, clamp port；9th, locking member； 91st, arc groove.

Specific embodiment

The utility model is described in further detail below in conjunction with attached drawing.

As shown in Figure 1, pipe expander mainly includes the pipe expander 2 being installed in rack 1, is installed in rack 1 and is located at The clamping device of 2 side of pipe expander, clamping device are mainly used for clamping copper pipe, copper pipe are made to be not easy during being flared Generate shaking；And the expander head 21 on pipe expander 2 is used to be embedded in the inner cavity of copper pipe, and under the promotion of pushing mechanism constantly Go deep into copper pipe, the bore of copper pipe is expanded, to achieve the purpose that expander, but existing pipe expander is in use usually It will appear situation about being slipped after copper pipe, therefore the present embodiment needle this problem improves the clamping device of pipe expander.

As depicted in figs. 1 and 2, a kind of clamping device of pipe expander, including lower module 3, upper module 4, regulating mechanism 5, under Module 3 includes die holder 31, lower caulking groove 32, lower clamp formwork 33, and die holder 31 is fixed in rack 1, in die holder 31 close to expander Lower retaining groove 311 is offered on the side wall of first 21 side；Lower caulking groove 32 is opened on the upper surface of die holder 31 and length direction is put down Row is in the length direction of rack 1, and caulking groove 32 is connected with lower retaining groove 311 at present for this, and the sectional area of lower retaining groove 311 be more than under it is embedding The sectional area of slot 32；The shape of lower clamp formwork 33 matches with lower caulking groove 32, the integrated setting on the side wall of 33 one end of lower clamp formwork The lower block 331 being useful in embedded lower retaining groove 311, lower clamp formwork 33 is embedded in lower caulking groove 32, and passes through the first fixation kit 6 It is fixed on die holder 31, the lower block 331 on lower clamp formwork 33 is located in lower retaining groove 311 at this time, and lower block 331 is contradicted under Die holder 31 is located on the side wall in lower retaining groove 311；Two are further opened on surface of the lower clamp formwork 33 back to 31 side of die holder Length direction is parallel to the length direction of lower caulking groove 32 and in the lower groove 332 of arc-shaped.

First fixation kit 6 includes the first threaded hole 61, the first bolt 62, and the first threaded hole 61 is opened in die holder 31 It is on side wall and adjacent with lower caulking groove 32 and lower retaining groove 311 respectively；First bolt 62 is threadedly connected in the first threaded hole 61, and the One bolt 62 passes through one end of the first threaded hole 61 to be pushed against on the side wall of lower clamp formwork 33.

Upper module 4 includes upper mold seat 41, upper embedded groove 42, upper clamp formwork 43, and upper mold seat 41 is by driving cylinder liftable to set In in rack 1 and positioned at the surface of die holder 31, offer and keep off on the side wall of 21 side of expander head in upper mold seat 41 Slot 411；Upper embedded groove 42 is opened on the surface of 41 face die holder of upper mold seat, 31 side, and is connected with upper retaining groove 411；Upper folder Mould 43 is embedded in upper embedded groove 42, and is fixed on upper mold seat 41 by the second fixation kit 7；Side wall in 43 one end of upper clamp formwork Upper integrated setting is useful for the upper stopper 431 in embedded upper retaining groove 411, after retaining groove 411 is interior in the insertion of upper stopper 431, on Block 431, which is contradicted, to be located in upper clamp formwork 43 on the side wall in upper retaining groove 411；On the surface of 43 face lower clamp formwork of upper clamp formwork, 33 side On open up there are two be used for lower groove 332 formed cooperation upper groove 432, formed between upper clamp formwork 43 and lower clamp formwork 33 at this time For the clamp port 8 of clamping copper pipe.

Second fixation kit 7 includes the second threaded hole 71, the second bolt 72, and the second threaded hole 71 is opened in upper mold seat 41 It is on side wall and adjacent with upper retaining groove 411 and upper embedded groove 42 respectively；Second bolt 72 is threadedly connected in the second threaded hole 71, and the Two bolts 72 pass through one end of the second threaded hole 71 to be pushed against on the side wall of upper clamp formwork 43.

As shown in Figures 2 and 3, regulating mechanism 5 includes adjustment seat 51, adjusting screw rod 52, adjustment disk 53, mandril 54, adjusts Seat 51 is fixed in rack 1 and positioned at side of the die holder 31 far from expander head 21, adjusting screw thread is offered in adjustment seat 51 Hole 511；Adjusting screw rod 52, which is threadedly connected to, to be adjusted in threaded hole 511, and the length direction of adjusting screw rod 52 is parallel to lower groove 332 length direction is fixed with to facilitate rotation adjusting screw rod 52 on the one end of adjusting screw rod 52 far from die holder 31 Handwheel 521；It is also threaded in annular shape on adjusting screw rod 52 and on the one end of adjustment seat 51 far from die holder 31 Locking member 9, be evenly spaced apart to offer multiple arc grooves 91 for facilitating rotation lock part 9 on the side wall of locking member 9；It adjusts Disk 53 includes disk body 531, connecting stud 532, and disk body 531 is rotationally connected with adjusting screw rod 52 on one end of die holder 31； Connecting stud 532 is fixed on disk body 531 back on the surface of 52 side of adjusting screw rod, and between two connecting studs 532 in The heart is away from the centre-to-centre spacing between equal to two lower grooves 332；Mandril 54 is threadedly connected on connecting stud 532, and two mandrils 54 One end far from disk body 531 is embedded at respectively in two lower grooves 332.

Specific implementation process：When needing to be flared copper pipe, the length being flared first according to copper pipe needs is to mandril 54 length being embedded in lower groove 332 are adjusted, since the one end of mandril 54 far from adjustment disk 53 is to be embedded at lower groove In 332, and copper pipe is, and lower groove 332 and upper groove 432 inconsistent with mandril 54 after being packed into lower groove 332 Length be it is fixed, therefore mandril 54 be embedded in lower groove 332 in length it is longer, then copper pipe is exposed to outside lower groove 332 Length is also longer, i.e. the flaring length of copper pipe is longer, and the flaring length of copper pipe can be adjusted according to this case；By copper After the flaring length adjustment of pipe to the length needed, copper pipe to be flared is put into lower groove 332, then starts driving gas Cylinder drives the piston rod of cylinder that upper mold seat 41 is driven to push, closes the support mouth formed between upper clamp formwork 43 and lower clamp formwork 33 Hold together, copper pipe is clamped, upper clamp formwork 43 is located at the side wall in upper groove 432 at this time and lower clamp formwork 33 is located in lower groove 332 Side wall is contradicted on the side wall of copper pipe so that and copper pipe is not allowed to be also easy to produce shaking during expander head 21 is embedded in copper pipe inner cavity, And mandril 54 is supported on the one end of copper pipe far from expander head 21 at this time, can limit copper pipe under the promotion lower edge of expander head 21 The length direction of groove 332 carries out displacement, therefore the collective effect of upper clamp formwork 43, lower clamp formwork 33 and mandril 54 can limit copper pipe Along the offset of all directions so that expander head 21 can expand the length for and setting on copper pipe, and product matter is improved so as to reach Measure the purpose of stability.

This specific embodiment is only explanation to the utility model, is not the limitation to the utility model, ability Field technique personnel can as needed make the present embodiment the modification of no creative contribution after this specification is read, but As long as it is all protected in the right of the utility model by Patent Law.

Claims

1. a kind of clamping device of pipe expander, it is characterised in that：Including carrying the lower module (3) of lower groove (332), passing through driving Cylinder liftable is set on pipe expander and carries the upper module (4) of upper groove (432), is set to lower module (3) side And the regulating mechanism (5) for adjusting copper pipe flaring length, it is formed between the upper module (4) and the lower module (3) useful In the clamp port (8) of clamping copper pipe, the regulating mechanism (5) is including being set to separate expander head (21) side of lower module (3) Adjustment seat (51), be threadedly connected in adjustment seat (51) and length direction be parallel to horizontal direction adjusting screw rod (52), rotation Be connected to adjusting screw rod (52) close to lower module (3) one end on adjustment disk (53), be fixed on the adjustment disk (53) back to Mandril (54) on one end of adjusting screw rod (52), the one end of the mandril (54) far from adjustment disk (53) are embedded at lower groove (332) in.

2. a kind of clamping device of pipe expander according to claim 1, it is characterised in that：Spiral shell on the adjusting screw rod (52) Line is connected with for adjusting screw rod (52) to be fixed on the locking member (9) in adjustment seat (51), the end of locking member (9) side Face is pushed against in adjustment seat (51).

3. a kind of clamping device of pipe expander according to claim 2, it is characterised in that：The side wall of the locking member (9) On offer the arc groove (91) being caught in for convenient wrench.

4. a kind of clamping device of pipe expander according to claim 1, it is characterised in that：Under the lower module (3) includes Die holder (31), is embedded at the lower caulking groove (32) being opened on the end face of close upper module (4) side of the die holder (31) Lower clamp formwork (33) in the lower caulking groove (32), the lower groove (332) are opened in the lower clamp formwork (33) back to die holder (31) it on the end face of side, and is provided on the die holder (31) lower clamp formwork (33) being fixed on die holder (31) The first fixation kit (6).

5. a kind of clamping device of pipe expander according to claim 4, it is characterised in that：The die holder (31) is back to institute The lower retaining groove (311) for offering on the end face of adjustment disk (53) side and being connected with lower caulking groove (32) is stated, the lower clamp formwork (33) is remote It is fixed on side wall from adjustment disk (53) one end for the lower block (331) in embedded lower retaining groove (311).

6. a kind of clamping device of pipe expander according to claim 4, it is characterised in that：First fixation kit (6) Including being opened in first threaded hole (61) adjacent on the side wall of the die holder (31) and with the lower retaining groove (311), screw thread The first bolt (62) being connected in first threaded hole (61), first bolt (62) is across the first threaded hole (61) One end is pushed against on the side wall of lower clamp formwork (33).

7. a kind of clamping device of pipe expander according to claim 1, it is characterised in that：The upper module (4) is including upper Die holder (41), be opened in upper embedded groove (42) of the upper module (4) on the end face of lower module (3) side, be embedded at it is described Upper clamp formwork (43) in upper embedded groove (42), the upper groove (432) are opened in the upper clamp formwork (43) back to upper mold seat (41) one On the end face of side, and it is provided on the upper mold seat (41) for upper clamp formwork (43) to be fixed on second on upper mold seat (41) Fixation kit (7).

8. a kind of clamping device of pipe expander according to claim 7, it is characterised in that：The upper mold seat (41) is back to institute The upper retaining groove (411) for offering on the end face of adjustment disk (53) side and being connected with upper embedded groove (42) is stated, the upper clamp formwork (43) is remote It is fixed on side wall from adjustment disk (53) one end for the upper stopper (431) in embedded upper retaining groove (411).

9. a kind of clamping device of pipe expander according to claim 7, it is characterised in that：Second fixation kit (7) Including being opened in second threaded hole (71) adjacent on the side wall of the upper mold seat (41) and with the upper retaining groove (411), screw thread The second bolt (72) being connected in second threaded hole (71), second bolt (72) is across the second threaded hole (71) One end is pushed against on the side wall of upper clamp formwork (43).

10. a kind of clamping device of pipe expander according to claim 1, it is characterised in that：The adjustment disk (53) includes The disk body (531) that is rotationally connected on adjusting screw rod (52) and the disk body (531) is fixed on back to adjusting screw rod (52) side Connecting stud (532) on end face, the mandril (54) are threadedly connected on the connecting stud (532).