CN211516233U - Hydraulic forming shear of roll forming machine - Google Patents

Abstract

The utility model relates to a hydraulic forming of roll forming machine is cut, it includes the frame, frame one side is provided with the control box, is equipped with a plurality of slide bars in the frame, slides and overlaps the slide plate of locating on each slide bar, is fixed with the shearing tool below the slide plate, and the slide bar upper end is provided with the support seat, is provided with drive arrangement on the support seat, and drive arrangement is including setting up pneumatic cylinder and spacing subassembly on the support seat; the limiting assembly comprises an upper limiting switch and a lower limiting switch which are arranged on the upper supporting seat, a limiting rod arranged on the sliding plate and a limiting part sleeved on the limiting rod; a plurality of groups of connecting components are arranged between the upper supporting seat and the sliding plate. The utility model has the advantages of improve the operating stability of shearing mechanism in the roll-in make-up machine.

Description

Hydraulic forming shear of roll forming machine

Technical Field

The utility model relates to a roll-in former technical field, more specifically say, it relates to a hydroforming of roll-in former is cut.

Background

Rolling, defined as cold roll forming in material forming; the cold roll forming is an energy-saving, material-saving and efficient metal forming process. The cold roll forming is to continuously and transversely bend metal plate strips such as coiled materials, strip materials and the like through a plurality of forming rollers which are sequentially arranged to form sectional materials with specific end surfaces, and then the sectional materials are cut into specific lengths through a cutting device.

Chinese patent with publication number CN208303578U discloses a color steel tile forming machine, which comprises a frame, install multichannel roll group in the frame, the roll group is mutually supported and is formed with the delivery track, be located and install shearing mechanism in the frame of delivery track output, shearing mechanism includes two slide bars, slidable cover is equipped with cuts out the cutter between the slide bar, hydraulic cylinder is installed at the slide bar top, hydraulic cylinder passes through the hydro-cylinder pole and is connected with cutting out the cutter, edge of a knife edge protrusion at the cut out cutter is equipped with a plurality of blade, every roll group includes a plurality of upper roll that sets up side by side and is located a plurality of and the lower roll of upper roll below a plurality of and upper roll one-to-one, an upper roll in every roll group wears to be equipped with a driving shaft.

Similar to the shearing mechanism in the prior art, the main structure of the shearing mechanism comprises a rack, a sliding rod, a shearing knife, a driving device and a limit switch, wherein the driving device drives the shearing knife to move along the height direction of the sliding rod and cut a forming plate, and the limit switch limits the advancing range of the shearing knife.

The above prior art solutions have the following drawbacks: the shearing knife is slidably sleeved between the two sliding rods, although the sliding rods can limit the shearing knife to rotate around the axis of the driving device in the circumferential direction to a certain extent; however, when the shearing knife is in the process of ascending or descending, if the processes of the two ends of the shearing knife in the length direction are asynchronous, the shearing knife is clamped at a certain position on the sliding rod, the driving device is always in the process of pulling up or pressing down the shearing knife at the moment, and if the power supply is not turned off in time, the situation that the shearing knife and the sliding rod are damaged occurs, the operation of the shearing structure in the technical scheme has great instability, and therefore improvement is needed.

SUMMERY OF THE UTILITY MODEL

To the technical problem that has now, an object of the utility model is to provide a hydroforming of roll-in forming machine is cut, and it has the advantage that improves the operating stability of shearing mechanism in the roll-in forming machine.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a hydroforming of roll forming machine is cut, set up the slide bar in the frame including frame and symmetry, still include the sword of cuting of being connected with each slide bar slides, each slide bar upper end level is provided with the support seat, it has set firmly the drive arrangement who is used for the drive to cut the sword lift to go up the support seat upper end, be provided with the control box of being connected with drive arrangement control in the frame, drive arrangement's lower extreme links firmly with the upper end of cuting the sword, it is provided with the rack along the equal vertical both ends on its length direction to cut the sword, two racks all wear to establish the support seat, it is connected with the axostylus axostyle that sets up along last support seat length direction to rotate on the support seat, the cover.

By adopting the technical scheme, the frame and the sliding rod are arranged to position the shearing knife, the upper supporting seat is arranged to fix the driving device, the driving device is used for controlling the shearing knife to lift up and down to perform cutting work, and the control box is used for controlling the driving device to operate; rotate on last supporting seat to be connected and be provided with the axostylus axostyle and fix with the gear of two rack toothing effects, when the rack is followed and is sheared the sword and take place to reciprocate, two gears are followed simultaneously and are taken place to rotate, and two gears will be fixed in on the axostylus axostyle, two gears will take place synchronous rotation, so make two rack synchronous lifting with two gear toothing effects, thereby make both ends more synchronous at the lift in-process on shearing sword length direction, so set up and will set up and shear more stable of sword operation, the operating stability who shears the mechanism in the roll-in make-up machine has further been improved.

The utility model discloses further set up to: the driving device comprises a hydraulic cylinder arranged on the upper surface of the upper supporting seat and a limiting component arranged on the upper supporting seat and used for controlling the stroke of the shearing knife, and the hydraulic cylinder and the limiting component are both in control connection with the control box.

By adopting the technical scheme, the hydraulic cylinder is arranged to provide more stable driving power, and the limit assembly is arranged to control the lifting stroke of the shearing knife, so that the cutting accuracy of the shearing knife is improved; the information is fed back to the control box through the limiting assembly, and then is fed back to the hydraulic cylinder after being processed by the control box and is controlled to be started or closed.

The utility model discloses further set up to: spacing subassembly is including setting up on last supporting seat and the transversal first mount pad of personally submitting "L" word shape setting, is provided with limit switch and lower limit switch on the first mount pad side by side along its direction of height, and upper limit switch and lower limit switch all are connected with control box control, cuts the vertical gag lever post that is provided with in sword upper end, and the gag lever post passes a pot head of last supporting seat and is equipped with the locating part, and the locating part is located between limit switch and the lower limit switch's the contact.

By adopting the technical scheme, the function of the limiting piece for sensing the stroke of the shearing knife is realized by utilizing the cooperation between the upper limiting switch, the lower limiting switch, the limiting rod and the limiting piece; when the shearing knife starts to descend, the limiting rod descends along with the shearing knife, when the shearing knife just cuts a workpiece, the lower end of the limiting piece just touches a contact of the lower limiting switch, the lower limiting switch transmits information to the control box, and the hydraulic cylinder is controlled by the control box to start to drive the shearing knife to ascend; in the process that the hydraulic cylinder controls the shearing knife, when the upper end of the limiting part touches the contact of the upper limiting switch, the hydraulic cylinder stops driving the shearing knife to ascend. So set up, will make the shearing sword cut more accurate, stable through the accurate cooperation of spacing subassembly and pneumatic cylinder.

The utility model discloses further set up to: the first mounting seat is provided with a sliding groove along the height direction of the first mounting seat, a clamping plate is arranged on one side face, away from the upper limit switch and the lower limit switch, of the first mounting seat, a locking bolt is arranged on the clamping plate, and the locking bolt penetrates through the sliding groove to lock and fix the upper limit switch and the lower limit switch.

Through adopting above-mentioned technical scheme, will be convenient for go up limit switch and lower limit switch through setting up the groove of sliding and adjust the position along the high direction of first mount pad. The upper limit switch and the lower limit switch are clamped and fixed on the first mounting seat through the matching of the clamping plate and the bolt, and the stroke of the shearing knife is further controlled by adjusting the distance between the upper limit switch and the lower limit switch, so that the stroke of the shearing knife is adjusted more flexibly.

The utility model discloses further set up to: the locating part includes upper stop block and lower stop block along its direction of height symmetry setting, and lower stop block sets up the end with upper stop block in opposite directions and is fixed with lower nut and upper nut respectively, and upper nut and lower nut all with gag lever post threaded connection.

Through adopting above-mentioned technical scheme, it is fixed with the lower nut to limit the piece down, goes up the spacing piece and is fixed with the upper nut, all with gag lever post threaded connection through setting up upper nut and lower nut, is convenient for adjust the position of spacing piece and lower spacing piece on the gag lever post, further controls the stroke of shearing the sword through adjusting the relative position between position and last limit switch and the lower limit switch of locating part upper end and lower extreme for the stroke of shearing the sword is adjusted more in a flexible way.

The utility model discloses further set up to: the shearing knife is horizontally provided with a sliding plate at the upper end, the shearing knife and the sliding plate are locked and fixed through a bolt, the sliding plate is sleeved on each sliding rod in a sliding manner, the upper surface of the sliding plate is fixedly connected with the lower end of the driving device, and the two racks are fixedly arranged on the upper surface of the sliding plate.

Through adopting above-mentioned technical scheme, through can dismantling to be provided with the slide plate on shearing the sword, the rack is connected with drive arrangement and slide plate, will slide the slide plate and slide the cover and locate each slide bar on, so set up and will be convenient for change and shear the sword.

The utility model discloses further set up to: two second mounting seats are symmetrically arranged in the length direction of the upper end of the shearing knife, two racks are respectively fixed on the corresponding second mounting seats through bolt locking, two through holes located above the two second mounting seats are formed in the upper supporting seat, and the two second mounting seats respectively penetrate through the corresponding through holes and extend out of the upper supporting seat.

Through adopting above-mentioned technical scheme, through setting up the second mount pad and with rack demountable installation on the second mount pad, so set up two racks of dismouting of being convenient for.

The utility model discloses further set up to: two third installation seats are arranged on the upper end face of the upper support seat side by side, ball bearings are arranged in the two third installation seats, two ends of the shaft rod are respectively inserted into the corresponding ball bearings, and the two third installation seats are fixed on the upper support seat through bolt locking.

Through adopting above-mentioned technical scheme, fix the bull stick through setting up the third supporting seat, set up ball bearing and realize that the bull stick is connected with the rotation of third supporting seat, can dismantle the third supporting seat and set up on last supporting seat, the staff's dismouting bull stick of being convenient for.

The utility model discloses further set up to: the pneumatic cylinder is arranged along last supporting seat length direction equidistance and is provided with two at least, and the slide bar is arranged along last supporting seat width direction equidistance and is provided with two at least pairs, and each pneumatic cylinder all links firmly with shearing the sword, and each slide bar all slides with shearing the sword and be connected.

By adopting the technical scheme, the shearing knife is more uniformly stressed by the hydraulic cylinders by arranging at least two hydraulic cylinders, so that the lifting process of the shearing knife is more stable; at least two pairs of slide bars are arranged, so that the limiting points of the pair of shearing knives are increased, and the stability of the lifting movement of the shearing knives is further increased; such an arrangement will increase the stability of the overall shearing mechanism.

The utility model discloses further set up to: go up the supporting seat and cut the sword and set up in opposite directions and serve and be provided with at least two sets of coupling assembling of arranging along cutting sword length direction equidistance, each coupling assembling all is including setting up the last articulated seat of terminal surface under last supporting seat, set up in the articulated seat under of cutting the sword upper end and connect the connecting rod between last articulated seat and the articulated seat down, the both ends of each connecting rod all pass through bolt and nut with the articulated seat of corresponding last articulated seat and articulated seat down and press from both sides tightly fixedly.

Through adopting above-mentioned technical scheme, because it sets up on each slide bar to cut the sword to slide, when equipment was idle, all gravity of cutting the sword will be used in the drive arrangement who links to each other rather than, drive arrangement's burden will have increased for a long time, cause certain damage to drive arrangement, consequently set up coupling assembling and will cut the gravity of sword and use on the supporting seat, install the connecting rod to corresponding articulated seat and articulated seat down when equipment is idle on, so set up the burden that will alleviate drive arrangement, drive arrangement's life is prolonged.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the two racks are symmetrically arranged in the length direction of the upper end of the shearing knife, the two racks penetrate through the upper supporting seat, the upper supporting seat is rotatably connected with a shaft rod arranged along the length direction of the upper supporting seat, the shaft rod is sleeved with a gear meshed with the two racks, and the two ends of the shearing knife in the length direction can be synchronously lifted through the cooperation among the gear, the racks and the shaft rod, so that the lifting of the shearing knife is more stable, and the running stability of a shearing mechanism in a rolling forming machine is further improved;

(2) including pneumatic cylinder and spacing subassembly through setting up drive arrangement, spacing subassembly includes limit switch, limit switch down, set up the gag lever post on shearing the sword and set up the locating part on the gag lever post, come to shear the stroke information feedback of sword to the control box through the cooperation between limit switch, limit switch down, gag lever post and the locating part, through the operation of control box control pneumatic cylinder, so set up the stroke that will realize more accurate, stable control shearing the sword.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an enlarged partial schematic view of portion A of FIG. 1;

FIG. 3 is an enlarged partial schematic view of portion B of FIG. 1;

fig. 4 is a schematic structural view of another viewing angle of the present invention;

fig. 5 is a partially enlarged schematic view of a portion C in fig. 4.

Reference numerals: 1. a frame; 2. a slide bar; 3. a shearing knife; 4. an upper support base; 5. a drive device; 51. a hydraulic cylinder; 52. a limiting component; 521. a first mounting seat; 522. an upper limit switch; 523. a lower limit switch; 524. a limiting rod; 525. a limiting member; 5251. an upper limit block; 5252. a lower limiting block; 5253. screwing a nut; 5254. a lower nut; 6. a control box; 7. a rack; 8. a shaft lever; 9. a gear; 10. a sliding groove; 11. a clamping plate; 12. locking the bolt; 13. a slide plate; 14. a second mounting seat; 15. a through hole; 16. a third mounting seat; 17. a ball bearing; 18. a connecting assembly; 181. an upper hinge base; 182. a lower hinge base; 183. a connecting rod.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, a hydraulic forming shear of a rolling forming machine disclosed by the present invention comprises a frame 1 located at an output end of the rolling forming machine, slide bars 2 symmetrically arranged on both sides of the output end of the frame 1 for guiding, and a shearing knife 3 connected with each slide bar 2 in a sliding manner for cutting a workpiece, wherein an upper support 4 is horizontally arranged at an upper end of each slide bar 2, a driving device 5 for driving the shearing knife 3 to ascend and descend is fixedly arranged at an upper end of the upper support 4, a control box 6 in control connection with the driving device 5 is arranged on the frame 1, racks 7 are vertically arranged at both ends of the shearing knife 3 along the length direction thereof, the two racks 7 penetrate through the upper support 4, a shaft lever 8 arranged along the length direction of the upper support 4 is rotatably connected to the upper support 4, a gear 9 engaged with the two racks 7 is fixed on the upper outer wall of the shaft lever 8 through a bolt lock, through the cooperation of the rack 7 on the shearing knife 3, the rotating rod on the upper supporting seat 4 and the gear 9, the two ends of the shearing knife 3 in the length direction can be synchronously lifted, the shearing knife 3 can stably operate in the lifting process, and the operation stability of the shearing mechanism of the rolling forming machine is further improved.

Referring to fig. 1, at least two pairs of sliding rods 2 are arranged at equal intervals along the width direction of an upper supporting seat 4, the upper supporting seat 4 is fixed at the upper end of each sliding rod 2 through a bolt lock, a sliding plate 13 is horizontally arranged at the upper end of a shearing knife 3, the shearing knife 3 is fixed at the lower surface of the sliding plate 13 through a bolt lock, the sliding plate 13 is sleeved on each sliding rod 2 in a sliding manner, and the joints of the sliding plate 13 and each sliding rod 2 are provided with linear bearings sleeved on the outer wall of each sliding rod 2.

Referring to fig. 1, the driving device 5 includes a hydraulic cylinder 51 provided on an upper surface of the upper support 4 for providing driving power, and a stopper assembly 52 provided on the upper support 4 for controlling a stroke of the cutting blade 3. Furthermore, hydraulic cylinder 51 is provided with two at least along upper supporting seat 4 length direction equidistance arrangement, and each hydraulic cylinder 51 all is connected with control box 6 control, and the hydraulic lever lower extreme of each hydraulic cylinder 51 all passes upper supporting seat 4 and attaches the upper surface that is fixed in slide plate 13 through the mode lock of flange joint, and the cylinder body of each hydraulic cylinder 51 all attaches the upper surface that is fixed in upper supporting seat 4 through the bolt lock.

As shown in fig. 1 and 3, the limiting component 52 includes a first mounting base 521 disposed on the upper supporting base 4 and having an L-shaped cross section, an upper limiting switch 522 and a lower limiting switch 523 are disposed on the first mounting base 521 side by side along a height direction of the first mounting base, the upper limiting switch 522 and the lower limiting switch 523 are both in control connection with the control box 6, a limiting rod 524 is vertically disposed at an upper end of the shearing knife 3, a limiting member 525 is sleeved at one end of the limiting rod 524, which penetrates through the upper supporting base 4, and the limiting member 525 is located between contacts of the upper limiting switch 522 and the lower limiting switch 523; when the shearing knife 3 starts to descend, the limiting rod 524 descends along with the shearing knife 3, when the shearing knife 3 just finishes cutting a workpiece, the lower end of the limiting piece 525 just touches the contact of the lower limiting switch 523, the lower limiting switch 523 transmits information to the control box 6, and the hydraulic cylinder 51 is controlled to stop running through the control box 6; in-process that the sword 3 rose is cuted in the drive of pneumatic cylinder 51, when limit switch 522's contact was gone up in the upper end touch of locating part 525, pneumatic cylinder 51 stopped the drive and shears the sword 3 and rise, so will make to shear sword 3 and cut more accurate, stable through the accurate cooperation of spacing subassembly 52 with pneumatic cylinder 51.

As shown in fig. 1 and 3, the limiting member 525 includes an upper limiting block 5251 and a lower limiting block 5252 symmetrically arranged along the height direction thereof, the opposite ends of the lower limiting block 5252 and the upper limiting block 5251 are respectively and fixedly connected with a lower nut 5254 and an upper nut 5253, and the upper nut 5253 and the lower nut 5254 are both in threaded connection with the limiting rod 524, so that the positions of the upper limiting block 5251 and the lower limiting block 5252 on the limiting rod 524 can be conveniently adjusted, and the stroke of the cutting blade 3 can be further controlled by adjusting the relative positions between the upper end and the lower end of the limiting member 525 and the upper limiting switch 522 and the lower limiting switch 523, so that the stroke adjustment of the cutting blade 3 is more flexible.

Furthermore, as shown in fig. 4 and 5, a sliding groove 10 is formed in the first mounting seat 521 along the height direction thereof, a clamping plate 11 is disposed on a side surface of the first mounting seat 521 away from the upper limit switch 522 and the lower limit switch 523, a locking bolt 12 is disposed on the clamping plate 11, the locking bolt 12 penetrates through the sliding groove 10 to lock and fix the upper limit switch 522 and the lower limit switch 523 on the first mounting seat 521, so that the relative position between the upper limit switch 522 and the lower limit switch 523 can be conveniently adjusted, and the stroke of the shearing blade 3 can be further flexibly adjusted.

Referring to fig. 1 and 2, two second mounting seats 14 are symmetrically arranged in the length direction of the upper end surface of the sliding plate 13, the two second mounting seats 14 are fixed on the sliding plate 13 through bolt locking, two racks 7 are fixed on the corresponding second mounting seats 14 through bolt locking, two through holes 15 are formed in the upper supporting seat 4 and located right above the two second mounting seats 14, the two second mounting seats 14 penetrate through the corresponding through holes 15 respectively and extend out of the upper supporting seat 4, and the rack 7 can be conveniently dismounted through the arrangement.

Referring to fig. 1 and 2, two third mounting seats 16 are arranged on the upper end surface of the upper support seat 4 side by side, ball bearings 17 are arranged in the two third mounting seats 16, two ends of the rotating rod in the axial direction are respectively inserted into the corresponding ball bearings 17, the two third mounting seats 16 are fixed on the upper support seat 4 through bolt locking, and the shaft rod 8 can be conveniently mounted through the arrangement.

As shown in fig. 4 and 5, at least two groups of connecting assemblies 18 are arranged on the end surface of the upper support seat 4 opposite to the sliding plate 13 and are equidistantly arranged along the length direction of the sliding plate 13, each group of connecting assemblies 18 comprises an upper hinge seat 181 arranged on the lower end surface of the upper support seat 4, a lower hinge seat 182 arranged on the upper end surface of the sliding plate 13 and a connecting rod 183 connected between the upper hinge seat 181 and the lower hinge seat 182, the two ends of each connecting rod 183 are clamped and fixed with the corresponding upper hinge seat 181 and the corresponding lower hinge seat 182 through bolts and nuts, when the device is idle, the gravity of the shearing knife 3 is applied to the upper support seat 4 through the connecting action of the connecting assemblies 18, the burden of the hydraulic cylinder 51 is reduced, and the service life of the hydraulic cylinder 51 is prolonged; when the equipment needs to be operated, the locking effect of each connecting component 18 is released, and each connecting rod 183 is taken down.

The implementation principle of the embodiment is as follows:

when the device is in an idle state, the upper end of the limiting member 525 abuts against the contact of the upper limiting switch 522, each hydraulic cylinder 51 is in a closed state, and each connecting assembly 18 is installed between the upper supporting seat 4 and the sliding plate 13.

When the equipment is started to perform shearing work, the control box 6 controls the hydraulic cylinder 51 to push the shearing knife 3 to move downwards, after the workpiece is cut, the lower end of the lower limiting block 5252 just touches a contact of the lower limiting switch 523, the lower limiting switch 523 transmits information to the control box 6, the control box 6 transmits a control command to the hydraulic cylinder 51, and the hydraulic cylinder 51 starts to drive the shearing knife 3 to start to rise upwards; in the process that the hydraulic cylinder 51 drives the shearing blade 3 to ascend, when the upper end of the upper limit block 5251 touches the contact of the upper limit switch 522, the hydraulic cylinder 51 stops driving the shearing blade 3 to ascend, so that a shearing process is completed.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims (10)

1. The utility model provides a hydraulic forming of roll forming machine is cut, includes that frame (1) and symmetry set up slide bar (2) on frame (1), its characterized in that: still include with each slide bar (2) shear sword (3) of being connected that slides, each slide bar (2) upper end level is provided with supporting seat (4), go up supporting seat (4) upper end and set firmly drive arrangement (5) that are used for the drive to cut sword (3) and go up and down, be provided with control box (6) of being connected with drive arrangement (5) control on frame (1), the lower extreme of drive arrangement (5) links firmly with the upper end of shearing sword (3), it is provided with rack (7), two along the equal vertical rack (7) that is provided with in its length direction's both ends on sword (3), rack (7) are all worn to establish supporting seat (4), go up supporting seat (4) go up to rotate and be connected with along axostylus axostyle (8) that supporting seat (4) length direction set up, the cover is equipped with two on axostylus axostyle (8) gear (9) of rack.

2. The hydroforming shears of a roll forming machine according to claim 1, wherein: drive arrangement (5) are including setting up in pneumatic cylinder (51) of upper support (4) upper surface and setting up in upper support (4) with spacing subassembly (52) that are used for controlling shearing sword (3) stroke, pneumatic cylinder (51) and spacing subassembly (52) all are connected with control box (6) control.

3. The hydroforming shears of a roll forming machine according to claim 2, wherein: spacing subassembly (52) including setting up on last supporting seat (4) and transversal first mount pad (521) of personally submitting "L" word shape setting, be provided with limit switch (522) and limit switch (523) down on first mount pad (521) along its direction of height side by side, go up limit switch (522) and limit switch (523) down all with control box (6) control connection, cut the vertical gag lever post (524) that is provided with in sword (3) upper end, the pot head that last supporting seat (4) was passed in gag lever post (524) is equipped with locating part (525), locating part (525) are located between the contact of limit switch (522) and limit switch (523) down.

4. The hydroforming shears of a roll forming machine according to claim 3, wherein: the sliding groove (10) is formed in the first installation seat (521) along the height direction of the first installation seat, a clamping plate (11) is arranged on one side face, away from the upper limit switch (522) and the lower limit switch (523), of the first installation seat (521), a locking bolt (12) is arranged on the clamping plate (11), and the locking bolt (12) penetrates through the sliding groove (10) to lock and fix the upper limit switch (522) and the lower limit switch (523).

5. The hydroforming shears of a roll forming machine according to claim 3, wherein: the limiting piece (525) comprises an upper limiting block (5251) and a lower limiting block (5252) which are symmetrically arranged along the height direction of the limiting piece, the opposite arrangement ends of the lower limiting block (5252) and the upper limiting block (5251) are fixedly connected with a lower nut (5254) and an upper nut (5253) respectively, and the upper nut (5253) and the lower nut (5254) are in threaded connection with a limiting rod (524).

6. The hydroforming shears of a roll forming machine according to claim 1, wherein: it is provided with slide plate (13) to cut sword (3) upper end level, it is fixed through the bolt lock between sword (3) and slide plate (13) to cut, slide plate (13) slide the cover and locate on each slide bar (2), slide plate (13) upper surface links firmly with the lower extreme of drive arrangement (5), two rack (7) all set firmly in slide plate (13) upper surface.

7. The hydroforming shears of a roll forming machine according to claim 1, wherein: two second installation seats (14) are symmetrically arranged in the length direction of the upper end of the shearing knife (3), the racks (7) are fixed on the corresponding second installation seats (14) through bolt locking respectively, two through holes (15) located above the two second installation seats (14) are formed in the upper supporting seat (4), and the second installation seats (14) penetrate through the corresponding through holes (15) respectively and extend out of the upper supporting seat (4).

8. The hydroforming shears of a roll forming machine according to claim 1, wherein: two third installation seats (16) are arranged on the upper end face of the upper support seat (4) side by side, two ball bearings (17) are arranged in the third installation seats (16), two ends of the shaft rod (8) are respectively inserted into the corresponding ball bearings (17), and the third installation seats (16) are fixed on the upper support seat (4) through bolt locking.

9. The hydroforming shears of a roll forming machine according to claim 2, wherein: pneumatic cylinder (51) are arranged along last supporting seat (4) length direction equidistance and are provided with two at least, slide bar (2) are arranged along last supporting seat (4) width direction equidistance and are provided with two at least pairs, each pneumatic cylinder (51) all link firmly with shearing sword (3), each slide bar (2) all with shear sword (3) and slide and be connected.

10. The hydroforming shears of a roll forming machine according to claim 1, wherein: go up supporting seat (4) and shear sword (3) set up in opposite directions and serve and be provided with at least two sets of coupling assembling (18) of arranging along shearing sword (3) length direction equidistance, each coupling assembling (18) all including setting up articulated seat (181) on the terminal surface under last supporting seat (4), set up articulated seat (182) and connect at articulated seat (181) under and connecting rod (183) between articulated seat (182) under in shearing sword (3) upper end, each the both ends of connecting rod (183) all with corresponding articulated seat (181) on and articulated seat (182) down through bolt and nut clamp fixed.

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