CN101328914A - Main hydraulic cylinder of hydraulic bending machine - Google Patents
Main hydraulic cylinder of hydraulic bending machine Download PDFInfo
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- CN101328914A CN101328914A CNA2008100295676A CN200810029567A CN101328914A CN 101328914 A CN101328914 A CN 101328914A CN A2008100295676 A CNA2008100295676 A CN A2008100295676A CN 200810029567 A CN200810029567 A CN 200810029567A CN 101328914 A CN101328914 A CN 101328914A
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Abstract
The invention discloses a main hydraulic cylinder of a hydraulic bending machine, which comprises an end closure, a cylinder body, an outer piston rod, a flange sleeve, an inner piston rod, a screw rod sleeve, a nut and a gland bush; the end closure is fixed on one end of the cylinder body; the screw rod sleeve, the nut and the gland bush are fixed on the other end of the cylinder body; the outer piston rod is arranged inside the cylinder body; the flange cover is covered on the piston end of the outer piston rod; the piston end of the inner piston rod extends into the outer piston rod; the rod end of the inner piston rod is fixedly arranged on the end closure; and the inner piston rod is provided with an oil passage inside. Compared with the similar hydraulic cylinder, the main hydraulic cylinder is added with a chamber with no rod inside and a chamber with a rod inside and thus has a specific rapid drive function; under the conditions that a hydraulic system and an oil cylinder with the same drive condition are arranged downwards or a knife is dropped in weightlessness, the main hydraulic cylinder can be still easy to realize a function of secondary speed acceleration; a contact stress area of the screw rod sleeve is far more than that of the adjusting nut of the main hydraulic cylinder of the traditional bending machine, thereby improving the rigidity and stability of contact and ensuring good limit precision.
Description
Technical field
The present invention relates to hydraulic bending press, be specifically related to a kind of master hydraulic cylinder of hydraulic bending press.
Background technique
The master hydraulic cylinder of current hydraulic bending press, the mechanism that adopts adjustable dead block, as shown in Figure 1, its shortcoming is as follows:
1, for pursuing bigger speed, make the piston rod of master hydraulic cylinder and cylinder diameter very approaching during design.Nonetheless, limited by the moulding of diameter standard, the rod chamber a area that piston rod of often arranging in pairs or groups out and cylinder diameter form is usually desirable not to the utmost, in little tonnage specification, this area is in state bigger than normal mostly, what limitation was brought thus is under the peer system flow, and the opening speed of master hydraulic cylinder is on the low side, thereby influences the working efficiency of bender.
2, master hydraulic cylinder is adjusted nut b and is stopped piston rod movement when the piston rod release moves to adjustment nut b position, and piston rod is used in masterpiece and adjusts on the nut b, passes to mandrel c thereby adjust nut b again by screw pair, becomes the tensile stress of mandrel c.Be subjected to structural limitations, the diameter dimension of mandrel c is all less, and safety coefficient is also lower, the long-term use down, and being in the mandrel c impact tension state under, to be very easy to occur stress concentrated, fatigue fracture.
Summary of the invention
The present invention is in order to overcome the deficiency that above prior art exists, and provides that a kind of opening speed is fast, the master hydraulic cylinder of high working efficiency, hydraulic bending press that limit accuracy is good.
Purpose of the present invention realizes by following technological scheme: the master hydraulic cylinder of this hydraulic bending press is characterized in that: comprise end cap, cylinder body, outer piston bar, flange cover, inner piston rod, screw rod cover, nut and gland; End cap is fixed at an end of cylinder body, screw rod cover, nut and gland are fixed at the other end of cylinder body, the outer piston bar is located in the cylinder body, the flange cover is placed on the piston end of outer piston bar, the piston end of inner piston rod puts in the outer piston bar, the rod end of inner piston rod is fixedly installed in end cap, has oil duct in the inner piston rod.
Hexagonal was stopped up in one of them opening of described oil duct was provided with.
Be provided with a dust ring in the described gland.
The piston end of described outer piston bar is provided with guide ring.
The piston end of described inner piston rod is provided with guide ring.
Be provided with two wear rings between described flange cover and the inner piston rod, be provided with two wear rings between screw rod cover and the outer piston bar.
Be provided with O shape circle between described end cap and the cylinder body, be provided with O shape circle between end cap and the inner piston rod, be provided with O shape circle between flange cover and the outer piston bar.
Being provided with two opposite pistons between the piston end of described outer piston bar and the cylinder body encloses with Y shape, one of them piston has a teflon back-up ring with Y shape astragal, be provided with two opposite pistons bars between flange cover and the inner piston rod with Y shape circle and teflon back-up ring, be provided with two opposite pistons between inner piston rod and the outer piston bar and enclose and the teflon back-up ring with Y shape.
Described screw rod cover is connected with worm gear, and worm gear is connected with worm screw.
Described cylinder body is provided with a lubricating cup, and the passage of lubricating cup leads to worm gear and worm screw.
The working principle of the master hydraulic cylinder of this hydraulic bending press:
The stroke adjustment process: motor drives worm screw, worm gear rotation by synchronous band, synchronizing wheel, flat key, the rotation of worm gear makes the screw rod cover realize linear reciprocating motion, thereby changed the relative position with the outer piston bar, corresponding variation has also just taken place in the stroke of master hydraulic cylinder.
Stretching out and withdrawal of outer piston bar: when the interior rodless cavity quick oil feeding of inner piston rod, the interior rod chamber oil extraction of inner piston rod, the outer rodless cavity repairing of outer piston bar, the outer rod chamber exhaust of outer piston bar, the outer piston bar moves downward.The slide plate of bender is connected by screw rod, ball ring and outer piston bar, on the worktable of bender bed die is housed, and needs the sheet material of processing to be placed on the bed die, and the slide plate that upper die tooling is housed is descending fast thereupon under the self gravitation effect.F.F. finishes, and upper die tooling is near workpiece.This moment, position limit switch sent signal, and slide plate is descending with work speed.The worker advances the stage, interior rodless cavity oil-feed, and interior rod chamber produces back pressure, outer rodless cavity oil-feed, interior rodless cavity and outer rodless cavity pressure begin to rise, and along with the distortion of workpiece, pressure reaches maximum value gradually.The worker advances to finish, system's pressurize.Afterwards, interior rodless cavity and the instantaneous release of outer rodless cavity, interior rod chamber oil-feed, interior rodless cavity and outer rodless cavity oil return, outer rod chamber is air-breathing, and after the pressure of interior rod chamber overcame slide plate and deadweight of outer piston bar and corresponding surface friction drag, slide plate was up, the withdrawal of outer piston bar.Different according to thickness of slab and material are adjusted principal pressure and stroke, just can by about mould suppress required shape.
The present invention has following advantage with respect to prior art:
One, this master hydraulic cylinder has been Duoed an interior rodless cavity and interior rod chamber than traditional similar oil hydraulic cylinder, thereby has a distinctive fast driving function, hydraulic system at equal drive condition, oil cylinder underlying or agravicly fall under the tool section spare, still can realize secondary speedup function easily, the speed of outer piston bar withdrawal is fast, and opening speed is fast, high working efficiency;
Two, piston rod does not need circumferential location in addition, because the circumferential rotation of outer piston bar, does not influence the proper functioning of oil hydraulic cylinder;
Three, lubricating cup has improved the lubricated of cylinder hole and worm couple, in case get rusty and cross quick-wearing;
Four, the contact lifting surface area of screw rod cover is much larger than the adjustment nut of traditional bender master hydraulic cylinder, thereby improved contact rigidity and stability, guarantees limit accuracy preferably.
Description of drawings
Fig. 1 is the structural representation of the master hydraulic cylinder of existing hydraulic bending press.
Fig. 2 is the structural representation of the master hydraulic cylinder of a kind of hydraulic bending press of the present invention.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
The master hydraulic cylinder of hydraulic bending press as shown in Figure 2 comprises end cap 1, cylinder body 2, outer piston bar 3, flange cover 4, inner piston rod 5, screw rod cover 6, nut 7 and gland 8; End cap 1 is fixed at an end of cylinder body 2, screw rod cover 6, nut 7 and gland 8 are fixed at the other end of cylinder body 2, outer piston bar 3 is located in the cylinder body 2, flange cover 4 is placed on the piston end of outer piston bar 3, the piston end of inner piston rod 5 puts in the outer piston bar 3, the rod end of inner piston rod 5 is fixedly installed in end cap 1, has oil duct 9 in the inner piston rod 5, and hexagonal stopped up 10 in one of them opening of oil duct 9 was provided with.
The piston end of outer piston bar 3 is provided with guide ring 11.The piston end of inner piston rod 5 is provided with guide ring 12.
Be provided with a dust ring 13 in the gland 8.Be provided with two wear rings 14 between flange cover 4 and the inner piston rod 5, be provided with two wear rings 15 between screw rod cover 6 and the outer piston bar 3.
Be provided with O shape circle 16 between end cap 1 and the cylinder body 2, be provided with five O shape circles 17 between end cap 1 and the inner piston rod 5, be provided with two O shape circles 18 between flange cover 4 and the outer piston bar 3.
Be provided with two opposite pistons between the piston end of outer piston bar 3 and the cylinder body 2 and enclose 19 with Y shape, one of them piston has a teflon back-up ring 20 with Y shape circle 19, be provided with two opposite pistons bars between flange cover 4 and the inner piston rod 5 with Y shape circle 21 and teflon back-up ring 22, be provided with two opposite pistons Y shape circle 23 and teflon back-up ring 24 between inner piston rod 5 and the outer piston bar 3.
The working principle of the master hydraulic cylinder of this hydraulic bending press:
The stroke adjustment process: motor drives worm screw 26, worm gear 25 rotations by synchronous band, synchronizing wheel, flat key, the rotation of worm gear 25 makes screw rod cover 6 realize linear reciprocating motion, thereby changed the relative position with outer piston bar 3, corresponding variation has also just taken place in the stroke of master hydraulic cylinder.
Stretching out and withdrawal of outer piston bar 3: when the interior rodless cavity of inner piston rod 5 3. during quick oil feeding, the 4. oil extraction of interior rod chamber of inner piston rod 5, the 1. repairing of outer rodless cavity of outer piston bar 3, the 2. exhaust of outer rod chamber of outer piston bar 3, outer piston bar 3 moves downward.The slide plate of bender is connected by screw rod, ball ring and outer piston bar 3, on the worktable of bender bed die is housed, and needs the sheet material of processing to be placed on the bed die, and the slide plate that upper die tooling is housed is descending fast thereupon under the self gravitation effect.F.F. finishes, and upper die tooling is near workpiece.This moment, position limit switch sent signal, and slide plate is descending with work speed.The worker advances the stage, the 3. oil-feed of interior rodless cavity, 4. interior rod chamber produces back pressure, the 1. oil-feed of outer rodless cavity, interior rodless cavity 3. and outer rodless cavity 1. pressure begin the rising, along with the distortion of workpiece, pressure reaches maximum value gradually.The worker advances to finish, system's pressurize.Afterwards, interior rodless cavity 3. and the 1. instantaneous release of outer rodless cavity, the 4. oil-feed of interior rod chamber, interior rodless cavity 3. and the 1. oil return of outer rodless cavity, outer rod chamber is 2. air-breathing, when interior rod chamber pressure 4. overcome slide plate and outer piston bar 3 is conducted oneself with dignity and corresponding surface friction drag after, slide plate is up, 3 withdrawals of outer piston bar.Different according to thickness of slab and material are adjusted principal pressure and stroke, just can by about mould suppress required shape.
Above-mentioned embodiment is the preferred embodiments of the present invention; can not limit claim of the present invention; other any change or other equivalent substitute mode that does not deviate from technological scheme of the present invention and made is included within protection scope of the present invention.
Claims (10)
1, the master hydraulic cylinder of hydraulic bending press is characterized in that: comprise end cap, cylinder body, outer piston bar, flange cover, inner piston rod, screw rod cover, nut and gland; End cap is fixed at an end of cylinder body, screw rod cover, nut and gland are fixed at the other end of cylinder body, the outer piston bar is located in the cylinder body, the flange cover is placed on the piston end of outer piston bar, the piston end of inner piston rod puts in the outer piston bar, the rod end of inner piston rod is fixedly installed in end cap, has oil duct in the inner piston rod.
2, the master hydraulic cylinder of hydraulic bending press according to claim 1 is characterized in that: hexagonal was stopped up in one of them opening of described oil duct was provided with.
3, the master hydraulic cylinder of hydraulic bending press according to claim 1 is characterized in that: be provided with a dust ring in the described gland.
4, the master hydraulic cylinder of hydraulic bending press according to claim 1 is characterized in that: the piston end of described outer piston bar is provided with guide ring.
5, the master hydraulic cylinder of hydraulic bending press according to claim 1 is characterized in that: the piston end of described inner piston rod is provided with guide ring.
6, the master hydraulic cylinder of hydraulic bending press according to claim 1 is characterized in that: be provided with two wear rings between described flange cover and the inner piston rod, be provided with two wear rings between screw rod cover and the outer piston bar.
7, the master hydraulic cylinder of hydraulic bending press according to claim 1 is characterized in that: be provided with O shape circle between described end cap and the cylinder body, be provided with O shape circle between end cap and the inner piston rod, be provided with O shape circle between flange cover and the outer piston bar.
8, the master hydraulic cylinder of hydraulic bending press according to claim 1, it is characterized in that: be provided with two opposite pistons between the piston end of described outer piston bar and the cylinder body and enclose with Y shape, one of them piston has a teflon back-up ring with Y shape astragal, be provided with two opposite pistons bars between flange cover and the inner piston rod with Y shape circle and teflon back-up ring, be provided with two opposite pistons between inner piston rod and the outer piston bar and enclose and the teflon back-up ring with Y shape.
9, the master hydraulic cylinder of hydraulic bending press according to claim 1 is characterized in that: described screw rod cover is connected with worm gear, and worm gear is connected with worm screw.
10, the master hydraulic cylinder of hydraulic bending press according to claim 9 is characterized in that: described cylinder body is provided with a lubricating cup, and the passage of lubricating cup leads to worm gear and worm screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100295676A CN101328914A (en) | 2008-07-18 | 2008-07-18 | Main hydraulic cylinder of hydraulic bending machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100295676A CN101328914A (en) | 2008-07-18 | 2008-07-18 | Main hydraulic cylinder of hydraulic bending machine |
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| Publication Number | Publication Date |
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| CN101328914A true CN101328914A (en) | 2008-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008100295676A Pending CN101328914A (en) | 2008-07-18 | 2008-07-18 | Main hydraulic cylinder of hydraulic bending machine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927079A (en) * | 2012-11-12 | 2013-02-13 | 泸州华西机械有限责任公司 | Stroke adjustable oil cylinder |
| CN103953605A (en) * | 2014-04-28 | 2014-07-30 | 马鞍山市裕华机械制造有限公司 | Numerically-controlled stroke-adjustable hydraulic cylinder for hydraulic plate bending machine |
| CN106286460A (en) * | 2015-05-29 | 2017-01-04 | 湖北省咸宁三合机电制业有限责任公司 | A kind of ram cylinder |
| CN109185260A (en) * | 2018-11-06 | 2019-01-11 | 浙江双正机床有限公司 | A kind of integrated gas injection revolution oil hydraulic cylinder |
| CN110500334A (en) * | 2019-08-28 | 2019-11-26 | 邵玉强 | A kind of Quick cylinder |
-
2008
- 2008-07-18 CN CNA2008100295676A patent/CN101328914A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927079A (en) * | 2012-11-12 | 2013-02-13 | 泸州华西机械有限责任公司 | Stroke adjustable oil cylinder |
| CN103953605A (en) * | 2014-04-28 | 2014-07-30 | 马鞍山市裕华机械制造有限公司 | Numerically-controlled stroke-adjustable hydraulic cylinder for hydraulic plate bending machine |
| CN106286460A (en) * | 2015-05-29 | 2017-01-04 | 湖北省咸宁三合机电制业有限责任公司 | A kind of ram cylinder |
| CN109185260A (en) * | 2018-11-06 | 2019-01-11 | 浙江双正机床有限公司 | A kind of integrated gas injection revolution oil hydraulic cylinder |
| CN110500334A (en) * | 2019-08-28 | 2019-11-26 | 邵玉强 | A kind of Quick cylinder |
| CN110500334B (en) * | 2019-08-28 | 2020-12-01 | 江苏天禄特材厂 | Quick oil cylinder |
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Open date: 20081224 |