DE1805528C3 - Stripper, universal stripper or pincer hoist for pincer cranes, especially stripper cranes - Google Patents

Description

The invention relates to a stripper, universal stripper or pincer locking mechanism for pincer cranes, in particular stripper cranes, with a pincer and one that is displaceable relative to the tong support member and is connected to a spindle or spindle nut, the pliers controlling the stripper stamp or pulling element, which means in the idle stroke an electromechanical drive, longitudinally displaceable in the working stroke by means of a hydraulic drive is.

With such a known stripper plant, compared to stripper plants with either only hy-

hydraulic or mechanical spindle actuation certain advantages (e.g. high average speed in the case of stripping and, as a result, work that is economically favorable; Saving in weight and equipment; low

Lifting height for the hydraulic cylinders, as those for stripping. Block pulling and block gripping required Pressure generating organs can be designed to be relatively low in their performance) achieved, but exists the hydraulic drive consists of several hydraulic

Lischen cylinders that are at a distance from the spindle axis and around it on a movable Stripper stamp carriers are arranged, which brings a wide construction with it, so that in particular when the complete work (stripper or pincer mechanism) u; the traverse is rotatably mounted, the space requirement becomes undesirably large. In addition, in the known version, additional Spring sets or hydraulic cylinders for the return movement of the stripper stamp carrier in the normal

location, what the costs and the susceptibility to failure elevated.

In the case of stripper works that only work hydraulically, it is known to have only a single pressure cylinder double-acting piston with hydraulic

to arrange the drive above the stripper stamp, that the stripper punch axis and piston axis are aligned. The invention is based on the object that Stripper or pincer locking mechanism of the type mentioned in such a way that while maintaining the advantages the disadvantages mentioned (large space requirement, in particular large overall width, increased Susceptibility to failure, etc.) can be avoided.

This object is achieved according to the invention in that the single printing cylinder with double or single-acting piston having hydraulic drive so above the spindle on the Lifting cross member is arranged that the spindle axis and piston axis are aligned.

The advantages achieved with the invention are in particular that the susceptibility to failure is greatly reduced is because there is only one hydraulic cylinder. Furthermore, the space requirement is in the width direction less because the hydraulic cylinder is arranged above the spindle. After all, it is now also possible to arrange the spindle drive on the lifting beam so that this drive is not involved in the rotary movement participates.

In a further embodiment of the invention, the piston rod of the single pressure cylinder is via a Swivel joint with a non-rotatably connected to the spindle nut, enclosing the spindle nut Pipe connected, the pipe being connected by sliding springs with a from the electromechanical drive is connected to the actuatable drive tube.

According to a further embodiment of the invention, the piston rod of the single pressure cylinder is over a crosshead with in guides of the Hubtriiverse

3 4

led rollers and the lower end of the piston to the tube 14 rotatable, but immovable loaded

rod with a arranged inside the tube.

th. the spindle overlapping and on the spindle- For the pendulum mounting of the piston rod 17 in the nut-supported anti-rotation tube connected, tube 14 are 2 axial spherical roller bearings 20, 21 vorgewobei see the anti-rotation tube on its inside 5, the guide rail held by a sleeve in such a way at a distance to lead one with the spin- ten that d ^; e outer surface lines of the nut firmly connected to the tondel during the idle stroke has nenförmieen rollers on a circle (FIG. 2). one lying on the axis of the pressure piston 19

In order to have a lift-off center in the event of bumps during crane travel. The upper axial pendulum tube

To prevent ben the anti-rotation tube, iq supports bearing 20 is axially fixed by a threaded ring 24;

According to a further development of the invention, the lower spherical roller thrust bearing 21 is supported

stisch against the spindle nut enclosing a shoulder 25 in the tube 14 from.

Pipe off. Above the tube 14, the piston rod

In order to have a cross head 26 at a wear-related misalignment 17, which at its outer end the spindle nut encompassing sending pipe a 15 carries the rollers 27, which in guides 28 of the hub heighed Wear on the piston guide to prevent traverse 1 from running. At the bottom of the piston, are in a further embodiment of the invention rod 17, a sleeve 29 is fixedly arranged. the de piston rod in the tube and the anti-rotation sleeve 29 has a Kurzverzahrchr on the outside mounted oscillating on the spindle nut. nune on over which you can also use a

According to a further embodiment of the invention 20 toothed disk 30 connected ii> t, lie with a stripper, universal seam ripper or in such a way that between the disc 30 and the lower tong closing mechanism, whose swivel joint of two ren axial spherical roller bearings 2i a gap Axial spherical roller bearings and remains in between. The disc 30 is provided with an anti-rotation sleeve is formed, the outer surface lines of the connected in tube 31, which is movable on all sides a vertical plane lying four rollers of 25 on one on the top of the spindle nut 16 both Axial spherical roller bearings on a circle around an ordered bearing 32, for example an Axialeinen center on the piston axis. Spherical roller bearings. In the space in between

The drawing shows two exemplary embodiments between the disk 30 and the axial pendulum

of the invention shown. It shows roller bearing 21 is one which is supported on this

F i g. 1 a section through a compression spring 37 arranged in a Hubtra 30, whereby a possible

Verse rotatably mounted stripper mechanism, lifting of the anti-rotation tube 31 from the bearing 32

F i g. 2 shows an excerpt from FIG. 1 is prevented in greater. The anti-rotation tube 31 has

Scale in which the oscillating storage of the KoI on the inside guide strips 33 to the axial

rod is shown in the tube, guiding one at the upper end of a self-locking

F i g. 3 shows an excerpt from FIG. I in larger 35 the spindle 34 non-rotatably attached cross member 35

Scale in which the hydraulic cylinder with velvet on.

borrowed details is shown and by such an arrangement of crosshead

Fig. Ν the hydraulic cylinder for a pincer 26, sleeve 29, disk 30 and anti-rotation tube 31

Closing gear of a soaking furnace crane in section. is guaranteed that when twisting <_jr Spindei-

In a raised and lowered in a no further 40 nut 16, the spindle 34 in the axial direction

illustrated guide frame guided Hubtra- shifts.

verse 1 is a pincer tree 2 rotatable, but in the pendulum bearing of the piston rod

mounted immovably in the axial direction. The Zan- 17 and anti-rotation tube 31 are any

genbaum2 is compensated in a known way via a gear misalignment, which makes a safer

countershaft 3, a shaft 4, a clutch 5 and 45 operation and a long service life are guaranteed

Gear 6 of a slewing gear motor 7 to his are.

vertical axis rotatable. The shaft 4, the coupling The lower end of the spindle 34 is via bearings 38 ment 5, the gearbox 6 and the slewing gear motor 7 are connected to a guide tube 39, which are his arranged on the outside of the lifting beam 1. on the other hand with the stripper stamp 40, for example over

In the upper part of the tong tree there is a connection 50, a wedge connection. Dac guide drive tube 8 rotatable, in the axial direction each tube 39 has strips 41 on its outside. immovably mounted. The upper end of the This strips have grooves and run into Drive tube 8 is on its outside with a firmly connected to the forceps tree 2 carrier Bearing 9 of the drive tube 8 is supported by devices 42.

the bevel gear 10, which is pressed by a nut 11 against the hydraulic bearing 9 arranged on the lifting traverse 1, positively connected cylinder 18 (FIG. 3) for the stripper mechanism. The bevel gear 10 is connected via a pinion 12 with essentially a cylinder housing 43. An intermediate ceiling flange-mounted on the outside of the lifting beam 1! 44 and a cover 45 that closes off the cylinder drive 13, for example an electric motor, at the top. In the cylinder collar. 60 bottom 46 is a hole 47 for the piston rod

A further tube 14 17 is provided in the drive tube 8. The inner wall of the cylinder 1.8

displaceably guided, the sliding springs 15 with several paragraphs 48, 49 and 50, the

the drive roller 8 is positively connected. In paragraphs 49 and 50 as a support surface for the means

Tube 14, namely at its lower end, is a screw in the cylinder housing 43 fastened between

Spindle nut 16 firmly attached. At the upper end 65 schendeckel 44 serve. The false ceiling! 44 shares

of the tube 14 is a piston rod 17 one in the cylinder 18 in a compensation chamber 51 and

a hydraulic cylinder 18 guided piston a pressure chamber 52. The from the lower edge

19 non-rotatable relative to the lifting cross-member 1 and relative to the intermediate cover 44 up to the cylinder base 46

5 6

extending pressure space 52 consists of a large size, the pressure piston 19 in the cylinder 18 takes up space 52 a, which extends up to the shoulder 48 in FIG. 3 a position shown through the as and a smaller space 52 b, which extends from the ab- abutment for the pressure piston 19, the piston set 48 to the cylinder base 46. The larger space 52ο in the rod 17 and the components carried by the latter are slidably guided pressure S (tube 14, spindle 34, stripper stamp 40, etc.) die piston 19 divides the pressure space 52 into an upper end compression spring 55 is fixed. Pressure chamber 53 and a lower pressure chamber 54, if the drive 13 is switched on, then the pinion 12, the bevel gear 10, the drive tube 8, 19 will change over ren volumes when the pressure piston is moved. The piston 19 is supported in its sliding springs 15 and the tube 14, the spindle nut rest position, rotated to a position in the smaller space 52 b . The Nete compression spring 55 secured against rotation. The intermediate cover 44 has a spindle 34 and the stripper ram 40 consequently executes a downward movement on its side facing the pressure piston 19. Ti iff t the one recess 56, while on the side facing away from the KoI stripper die 40 on the side facing away from the mold 19, the pressure medium pump 57 is made - because the drive 13 is to be attached. 15 is weak to driik the block out of the mold Pressure medium pump 57 or the rod 17 and pressure piston 19 so long upward compensation chamber 51 is moved via the four-way slide 58 until the piston 19 penetrates into the recess 56 of the upper pressure chamber 53 and the recess 56 »ο intermediate cover 44, whereby the pressure making, the four-way slide 58 being displaced by the piston from the upper pressure chamber 53 into its upper end position against the pressure medium via the bore 60 under the action of spring forces. Which can drain the compensation chamber 51, while the recess 56 is connected to a bore 61 with a lower pressure chamber 54 via the bore 66 and a pressure-actuated switch 62 for controlling the four-way pressure medium pump 57 arranged in the cylinder housing 43 and the drive 13 in slide 65 Pressure medium from the compensation connection. The bore 61 can be filled via a storage space 51. The pressure piston 19, which is used to limit the maximum pressure in the recess 56, creates an equal space 51 in the pressure medium located in the heat valve 63 like a bore 64 next to the recess. 3 ° rise in pressure, to which the switch 62 responds in such a way In the cylinder housing 43 a four-way slide valve is responsive to the electromechanical drive 65 and bores 66 and 67, which switches off the 13 and the motor 76 of the pressure medium connection from the compensation chamber 51 via the four - pump 57 switches on. At the same time, due to the displacement slide 65 to the lower pressure chamber 54 or pressure increase, the four-way slide 58 is displaced upwards against the action of the spring from the lower pressure chamber 54 via the four-way slide 35, so that the connection (bore 60 ) from the upper pressure accumulator 68, whereby the space 53 to the compensation chamber 51 is blocked and the four-way slide 65 is free from the pressure medium in its connection (bore 59) from the upper end position of the pressure medium against the action of the spring pump 57 to the upper pressure chamber 53. That is brought into strength. The lower pressure chamber 54 is 4-sponsored ° the upper pressure chamber 53 and hoüber a bore 69 with a drive 13 hem pressurized pressure medium exerts on the koi controlling, connectedness druckbetätigbaren switch 70 ben 19 a correspondingly high compressive force, which the, The bore 69 via a roller bearing 21, the pipe 14, the spindle nut 16, and the safety valve 71 with the compensation chamber 51 connecting the spindle 34, which limits the maximum via the piston rod 17, the lower axial pendulum pressure in the lower pressure chamber 54 Guide tube 39 and the bond is. The upper pressure chamber 53 is transferred via a stripper die 40 to the block bore 72 to be pressed out with the four-way slide 65, the block slowly being pushed out of the die in such a way that it is pressed through the bore 72 onto the mold. The pressure medium acting from slide 65 during this process tries to push this pressure medium displaced towards the lower pressure chamber 54. The pressure accumulator 68 is 5 »dhim can flow unhindered through the bore 66 to a further bore 73 with a in the equalizing chamber 51, since the charging pump 74 connected to its lower equal chamber 51, the four-way slide valve 65 occupying the end division. On which the cylinder 18 closes up connection (bore 67) to the pressure accumulator blocks sending cover 45 are motors 75 and 76 for and the connection (bore 66) to the equalizing charge pump 74 and the pressure medium pump 57 an- 35 space 51 is free

Orderly Above the cylinder housing 43, the distance covered by the piston 19 is sufficient, cover 77 to protect the motors 75 and 76 in order to push the block out of the mold, then removed. The cylinder housing 43 can also have at the moment of loosening the block in the top of its outer side vertically arranged cooling ribs ren pressure chamber 53 or in the recess 56 a 79, the cooling air by a sudden Druckabfalt, with the pressure cover hood on this 77 arranged fan 78, switch 62, which is controlled by the motor 76, is activated. The pressure medium pump 57 is then shut down. In the following, the mode of operation of the four-way slide device arranged in the intermediate cover 44 is explained in more detail 58 by spring force into its lower wheel position. Process of block pressing, shown in the example 65 brought, the connection (bore 59) from the play of a stripper mechanism (F i g. 1 to 3). Pressure medium pump 57 to the upper pressure chamber 53 ge-In the rest position, when the electromechanical closed and the connection (bore 60) from the drive 13 and the hydraulic drive disconnected.

net is. The arranged in the cylinder housing 43 Four-wheel slide 65 does not change its position during this process. The piston 19 sinks through his Dead weight as well as the weight of the components connected to it downwards until c on animal compression spring 55 seated its rest position has taken. wherein the displaced from the lower pressure chamber 54 pressure medium via the Bore 66 / can flow out to compensating chamber 51, and the upper pressure chamber 53 via the bore 60 is filled with pressure medium from the storage room.

On the other hand, if the piston stroke is insufficient. to remove the block from the mold / u in one go, then the stripping process is repeated automatically. It does this in the following way: The piston 19 is moved down until it penetrates into the smaller space 52 /). At this moment will be in the one in dciscm space Pressure medium caused a pressure increase to which the switch 70 responds so that he the electromechanical drive 13 switches on immediately or somewhat delayed in such a way that the Strippcrstcmpel 40 executes a downward movement and the motor 76 of the pressure medium pump 57 switches off. the Vicrwcgeschiebcr 58 then assumes its lower position. The arranged in the cylinder housing 43 Vicrwegcschicbcr 65 does not change its position in spite of the pressure increase, since at the moment the If the pressure rises through the bore 72, the significantly higher pressure on the four-way valve during the stripping process 65 acts so that the connection (bore 66) from the lower pressure chamber 54 to the compensation chamber 51 remains open. There, as already mentioned, the one pressing the stripping stamp against the block drove 13 is too weak to push the ingot out of the mold as a result of the reaction movement the piston 19 moves upwards until it enters the recess 56 of the intermediate cover 44 penetrates, whereupon the previously described processes are repeated.

2. The process of gathering blocks in a stripper factory.

During the block grip process, the direction of rotation of the drive 13 is reversed with respect to the direction of rotation during the block pusher process. After the drive 13 has been switched on, the strip crimp tube 40 carries out an upward movement until the inwardly displaced pliers jaws are in contact with the load to be transported, for example a slab. Since the pliers legs can no longer be adjusted further inwards, the reaction force causes the piston 19 to move downwards from its rest position for so long - with the pressure medium displaced from the lower pressure chamber 54 flowing through the bore 66 into the compensation chamber 51 and pressure medium can flow via the bore 60 from the compensation room into the upper pressure chamber 53, since both four-way slide 58 and 65 assume their lower end position - until it dips into the smaller chamber 52 b. At the moment of I-.intauchcns in which b in the space 52 pressure medium, a pressure increase on the switch 70 responsive such that it switches off the drive 13 is formed. At the same time, the pressure increase causes the pressure increase to displace the upper I-.ntlslelliing against the I-Vdcrkraft, so that the connection (bore 67) to the pressure accumulator 68 is opened and the connection (bore 66) from the lower pressure chamber 54 to the compensation chamber 51 is closed . Since the pressure medium acting on the Vicrwegeschicber 65 via the bore 72 does not see it under pressure, it cannot prevent the upward displacement of the Vicrwegcschicber as a result of the pressure increase in the space 52 /) when the piston 19 is immersed. By the from the pressure accumulator 68 in

ίο the lower pressure chamber 54 flowing pressure medium the pliers legs are pressed against the block with the pressure required for safe transport.

To set down the blocks, the drive 13 is actuated briefly in such a way that the stripping stamp 40 performs a downward movement, as a result of which the Zangrnschenkcl are slightly adjusted outwards and. since there is currently no more pressure being exerted on the block, the piston 19 moves upwards, whereby a sudden pressure drop occurs in the lower pressure chamber 54, which is necessary for actuation de Vicrwcgcsehiebers 65 is used in the sense that that the connection (bore 67) from the pressure accumulator 68 to the lower pressure chamber 54 is closed and the connection (bore 66) from the lower pressure chamber 54 to the compensation chamber 51 is opened.

Should that from a hydraulic cylinder. Control devices and pressure generating organs existing force learning of the pre-scribed kind also hot-nivecrsal stripper works Find use, a further pressure-actuatable chamber is attached to the lower pressure chamber 54 Switch (not shown in the drawing) for the process of the block drawing to control the Pressure medium pump 57 to be provided. This additional switch is only available during the block pulling process switched into the control circuit of the pressure medium pump, the other being on the cylinder housing arranged switch 70 so long from the control circuit of the pressure medium pump and the clektromechanical Drive is switched until the additional switch of the pressure increase in the unleren pressure chamber 54 actuates svird. In addition, in the connection line from the four-way valve 65 to the pressure accumulator 68 an upstream of the four-way slide 65

tetcs. Via another line with the pressure medium pump related control unit, e.g. B. a magnetic switching valve to be provided which is actuated in this way that either the pressure medium supplied by the pressure medium pump 57 or the pressure medium supplied by the pressure accumulator 68 can flow via the four-way slide 65 to the lower pressure chamber 54. After all, he has to The stroke of the hydraulic cylinder can be increased according to the length required for block pulling. The mode of action in the process of blocking

hens is as follows: After switching on the drive 13, the St. ipper stamp 40 carries out an upward movement until the pliers legs rest with their pins on the block located in the mold. Since the pliers legs cannot be further adjusted by the drive 13, the piston 19 executes a downward movement as a result of the reaction force against the action of the compression spring 55. If the piston 19 dips into the space 52 b during this downward movement, the pressure of the pressure medium located therein increases. The additional switch responds to this increase in pressure in such a way that it switches off the drive 13, switches on the motor 76 of the vacuum pump 57, the shower

70 switches on again in the control circuit, as well as the control device connected upstream of the four-way slide valve 63 adjusted so that the connection from the pressure medium pump "57 to the four-way slide valve 65;.; opened and the connection from the pressure accumulator is closed. At the same time, as a result of the pressure increase the four-way slide 65 brought into its upper Eridstellung so that the connection (bore 66) from the lower pressure chamber 54 to the compensation chamber 51 is blocked and the connection from the control unit to the lower pressure chamber 54 is open. By the pressure medium flowing into the lower pressure chamber 54 a pressure is exerted on the piston 19, which in the stripper die 40 is used to pull the Blocks required force generated. That displaced from the upper pressure chamber during this process Pressure medium can flow unhindered through the bore 60 into the compensation chamber 51, since the Four-way slide 58 is in its lower end position.

If the ingot detaches itself from the mold during the drawing process, the pressure in the lower pressure chamber drops 54 suddenly off. The additional switch responsive to this pressure drop causes the Motor 76 of the pressure medium pump 57 is switched off. Since after loosening the block the print medium of the lower pressure chamber 54 is still under pressure due to the weight of the block, the remains at the lower pressure chamber connected switch 70 such actuated that the drive 13 is switched off and the upstream control unit is adjusted so that the connection from the pressure medium pump 57 to the four-way slide valve 65 is blocked and the connection is open from the accumulator 68 to the four-way valve. The four-way slide 65 takes a position in which the connection from the control unit to this is open. This allows print media from the pressure accumulator 68 into the lower Diruckraum 54 and the drawn from the mold Block is held securely during subsequent transport.

The in Fig. 4 shown power element for pincer welding works differs from the power element for stripper works in that the upper Printing room 53. as well as the false ceiling! 44 with control unit 58, 59, 60, 61 and 62 and the pressure pump 57 for the block handle is omitted. It is therefore expedient to place the pressure accumulator 68 in the compensation chamber 51 to be arranged.

If the stripper or pincer locking mechanism cannot be rotated, then the rotatable one is omitted Storage of the tong tree 2 in the lifting beam, the slewing mechanism 3 to 7 and the rotatable bearing run of the spindle 34 in the guide tube 39.

The application of the subject matter of the invention is not limited to stripping, but can also can be used for billet transport. In this case it is advisable to use the hydraulic drive to turn off what happens because

ao all switches connected to the pressure rooms be switched from the control circuit. The upward or downward movement of the stripper punch 40 or the tie rod then takes place by means of the much faster spindle drive.

Furthermore, it is also possible, instead of, as in FIG. 1 shows the rapid displacement of the stripper stamp 40 via the drive 13. the gear train 10, 12. the drive tube 8, the tube 14. the Make spindle nut 16 and spindle 34 to turn the spindle directly via the Zahnradgeiris.be (whereby the spindle does not move during this rotation) and the anti-twist spindle nut to guide displaceably in a pipe stored in the tong tree. The lower one is then analogous The end of the spindle nut is connected to the guide tube 39 via a bearing and that to the piston rod Spindle connected via bearings in the gear wheel 10 is displaceably guided in order to reduce the axial movement of the The piston is transferred via the spindle, the spindle nut and the guide tube to the stripper die be able.

For this purpose 2 sheets of drawings

Claims (6)

Patent claims: 1. Stripper-. Universal stripper or pincer locking mechanism for tong cranes, especially stripper cranes, with one tong and one relative slidable to the tong support member, connected to a spindle or spindle nut, the pliers controlling stripper stamp or pulling element, the or the idle stroke by means of a electromechanical drive, longitudinally displaceable in the working stroke by means of a hydraulic drive is. characterized, that the single pressure cylinder (1.8) with double-acting or single-acting piston (19) having hydraulic drive so arranged above the spindle (34) on the lifting beam (1) is. that spindle axis (36 a) and piston axis (36) fled 2. Stripper-. Universal stripper or pliers closing mechanism according to claim I, characterized in that the piston rod (17) of the single Pressure cylinder (18) via a swivel joint (20, 21, 22) with one with the spindle nut (16) rotatably connected, the spindle nut enclosing tube (14) is connected, the tube (14) via sliding springs (15) with an electromechanical one mounted in the forceps support member (forceps tree 2) Drive (10, 12, 13) actuatable drive rc'.ir (8) is connected. 3. Stripper-. Univ.'salstri per or pincer machine according to claims 1 and 2, characterized in that the piston rod (17) of the single pressure cylinder (18) via a cross head (26) with guides (28) of the lifting cross member guided rollers (27) is connected, and that the lower end of the piston rod (17) with one arranged inside the tube (14), overlapping the spindle (34) and on the spindle nut (16) supported anti-rotation tube (31) is connected, which enie on its inside Guide bar (33) for guiding a nut (35) firmly connected to the spindle during of the idle stroke. 4. Stripper, universal stripper or pincer locking mechanism according to claim 3, characterized in that the anti-rotation tube (31) supported elastically against the tube (14). 5. Stripper, universal stripper or pincer locking mechanism according to claims 2 to 4, characterized in that the piston rod (117) in the tube (14) and the anti-rotation tube (31) pivoted on the spindle nut (16) are. 6. Stripper, universal stripper or pliers according to claim 2, wherein the swivel of two spherical roller thrust bearings and therebetween Sleeve is formed, characterized in that the outer surface lines of the four rollers of the two axial spherical roller bearings (20, 21) lying in a vertical plane a circle (23) around a center point lying on the piston axis (36).