EP3261804A1 - Procédé servant à faire fonctionner un appareil portatif à fonctionnement hydraulique, ainsi qu'appareil portatif à fonctionnement hydraulique - Google Patents

Procédé servant à faire fonctionner un appareil portatif à fonctionnement hydraulique, ainsi qu'appareil portatif à fonctionnement hydraulique

Info

Publication number
EP3261804A1
EP3261804A1 EP16703952.8A EP16703952A EP3261804A1 EP 3261804 A1 EP3261804 A1 EP 3261804A1 EP 16703952 A EP16703952 A EP 16703952A EP 3261804 A1 EP3261804 A1 EP 3261804A1
Authority
EP
European Patent Office
Prior art keywords
pressure
hydraulic
return valve
moving part
return
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16703952.8A
Other languages
German (de)
English (en)
Other versions
EP3261804B1 (fr
Inventor
Egbert Frenken
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gustav Klauke GmbH
Original Assignee
Gustav Klauke GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gustav Klauke GmbH filed Critical Gustav Klauke GmbH
Publication of EP3261804A1 publication Critical patent/EP3261804A1/fr
Application granted granted Critical
Publication of EP3261804B1 publication Critical patent/EP3261804B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/10—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting fittings into hoses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/005—Hydraulic driving means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/34—Perforating tools; Die holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • B25B27/026—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same fluid driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/32—Hand-held perforating or punching apparatus, e.g. awls
    • B26F1/34—Hand-held perforating or punching apparatus, e.g. awls power actuated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/44—Cutters therefor; Dies therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/105—Portable riveters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/16—Drives for riveting machines; Transmission means therefor
    • B21J15/20—Drives for riveting machines; Transmission means therefor operated by hydraulic or liquid pressure

Definitions

  • the invention relates firstly to a method for operating a hydraulically operated hand-held device, for example a pressing device and / or punching or punching device, wherein the hand-held device has a hydraulic pump, a moving part, a fixed part and a return valve with an associated valve seat, wherein further the moving part by establishing a hydraulic pressure, which results from filling a hydraulic space with hydraulic fluid from a storage space using the hydraulic pump, is moved to a working position, which can be reached that the moving part upon reaching a predetermined working pressure by opening the return valve automatically from the working position is moved back to an end position, in any case, in this case, the return valve closes only after a certain on the return valve acting hydraulic pressure is exceeded.
  • the invention relates to a method of the type described above, wherein a pressure sensor is further provided.
  • the invention further relates to a method of the type mentioned, wherein further a workflow is triggered by applying a switch by a user's hand.
  • the invention relates to a hydraulically operated hand-held device, such as pressing device or punching or punching device, the handset having a hydraulic pump, a moving part, a fixed part and a return valve with an associated valve seat, wherein further the moving part by building a hydraulic pressure, which is filled of a hydraulic room with hydraulic fluid from a storage room using the hydraulic Raulikpumpe results, can be moved in an operative position, whereby it is achievable that the moving member is automatically moved from the working position to an end position upon reaching a predetermined working pressure by opening the return valve, in any case, the return valve closes only in this case after a certain pressure acting on the return valve hydraulic pressure is exceeded.
  • the invention relates to a hydraulically operated handset of the type described above, wherein a further pressure sensor is provided.
  • the invention also relates to a hydraulically operated hand-held device of the type described above, wherein further a workflow can be triggered by the action of a switch by a user's hand.
  • a hydraulically operated hand-held device of the type described above, wherein further a workflow can be triggered by the action of a switch by a user's hand.
  • Such methods and hand-held devices are known, for example, from DE 10 2008 028 957 A1, EP 0 944 937 B1 (US Pat. No. 6,276,186 B1, US Pat. No. 6,401,515 B2) and WO 2014/108361 A1.
  • Such hand tools are used for example as pressing devices, preferably for pressing or crimping cable lugs with inserted cable or for pressing tubular or tubular workpieces.
  • such handsets can be used for punching or punching in particular of metal components.
  • such handheld devices can also be designed as riveting devices or other cutting devices.
  • a hydraulically operated hand-held device in the form of a pressing device is described, for example, in EP 0 944 937 B1 (US Pat. No. 6,276,186 B1, US Pat. No. 6,401,515 B2).
  • This handset has a return valve, which is displaced upon reaching a predetermined hydraulic pressure in a valve open position and held in this position. This leads to a backflow of the movement supply part in the working position displacing hydraulic fluid. The moving part moves back into the basic or end position due to the missing or reduced pressure. At the latest when this end position is reached, the hydraulic pressure acting on the return valve is lowered in such a way that the return valve automatically closes again.
  • the invention has for its object to provide a method for operating a hydraulically operated hand-held device or a hydraulically operated hand-held device, which with a simple design of the device allows or in particular with respect to size and / or material of different workpieces simplifies handling.
  • a hydraulic pressure acting on the return valve for triggering a movement of the moving part into the end position increases independently of reaching the predetermined working pressure becomes.
  • 10m with respect to the hydraulically operated handset is in this regard geared to the fact that acting on the return valve hydraulic pressure can be increased independently of reaching the predetermined working pressure to a pressure value which causes an opening of the return valve.
  • the predetermined working pressure is the hydraulic pressure setting in the hydraulic fluid by a working process, in which the return valve moves into the open position due to its design. This hydraulic pressure is established when the return valve is closed in the hydraulic chamber, which extends from the moving part to a closing surface of the return valve.
  • the structural design is preferred by given that a partial piston surface of a valve piston in the valve seat is seated in the closed state, thus forming said closure surface. It is then a certain hydraulic pressure required to raise by acting on this partial piston surface, the return valve from the valve seat, so that can flow through the valve seat through hydraulic fluid, for example, in a hydraulic fluid reservoir.
  • the return valve is further preferably designed as a valve piston, that it has an overall piston surface on which the hydraulic fluid acts when the return valve is lifted from the valve seat, that is, in the open position. Due to the size ratio between the total piston area and the partial piston area, a comparatively very low pressure may be sufficient in the open position of the return valve relative to the partial piston area in order to hold the return valve in its open position.
  • the surface which supplements the partial piston surface to the total piston surface can also be acted upon by hydraulic means in the closed state of the return valve. However, not by the hydraulic means, which is contained in the hydraulic space ending at said closure surface.
  • a pressure of 300 to 600 bar, further example, 400 or 500 bar be required to lift the return valve from the valve surface, while the total piston area only one
  • Pressure of a few, for example, 5, 4 or less bar, up to about 0.5 bar, for example, requires to remain in the open position.
  • This acting on the entire piston surface pressure can be generated in a specific embodiment, for example, by acting on the moving part return spring.
  • the predetermined working pressure is usually higher with respect to an embodiment of the handset as a punching or punching device as it corresponds to the pressure required to carry out the hole or punching process.
  • the predetermined working pressure can also be set so high that the return valve works without further action only in the sense of a pressure relief valve.
  • the training of the handset in particular in the examples given variants, be provided so that when the return valve due to the predetermined working pressure, the moving part, as far as no further intervention takes place, runs back to its predetermined starting position.
  • a hydraulic pressure at which the return valve is moved to the open position be achieved by making an independent of an operation that is performed with the handset, acting pressure increasing in acting on the return valve hydraulic fluid becomes.
  • This pressure increase is carried out in the hydraulic medium, which acts on the surface of the return valve, which complements the partial piston surface to the total piston surface when the return valve is open.
  • the pressure may possibly be given for a short time.
  • the pressure increase is selected such that the return valve is thereby displaced into the open position.
  • the prevailing with regard to the moving part for performing the operation in the force acting on the moving part hydraulic fluid pressure has not regularly reached the predetermined working pressure. It is thus given that the return valve can be opened hydraulically, before applied to the moving part of the release pressure to the return valve according to predetermined working pressure.
  • the return valve is independent of the prevailing working pressure on the moving part hydraulically displaceable in the open position.
  • the return valve preferably closes only after a certain, acting on the return valve hydraulic pressure has dropped so far that the required due to the structural design of the return valve pressure load for holding the return valve in the open position is no longer ben.
  • the return valve may automatically operate with a changeable, i. pre-selected and compared to the predetermined working pressure modified working pressure are opened, preferably according to appropriate pressurization of the return valve.
  • the working pressure which is achieved in one operation - only -, thereby be adjusted as a modified working pressure.
  • a working pressure can be specified as modified working pressure, which is smaller than the maximum permissible working pressure, ie the above-mentioned predetermined working pressure at which the return valve preferably also opens automatically , or even this maximum working pressure corresponds.
  • the latter may be useful, for example, if the said maximum working pressure is to be actually achieved, but also only with greater accuracy.
  • at an exemplary predetermined or maximum working pressure of 600 bar optionally working pressures of 50 to 600 bar can be adjusted continuously or stepwise.
  • the device It is thus possible to make a load-related adaptation to the machining of workpieces to be carried out by means of the device, while maintaining an automatic return of the moving part into the end position after reaching the optionally set working pressure.
  • the setting of the modified working pressure can be performed from outside the handset, for example via a radio interface or optical interface.
  • the pressure increase preferably acts only briefly. In terms of time, the pressure increase in the range of a few tenths of a second can only be effective, for example over a period of 1/10 to 5/10 seconds.
  • the pressure increase is in particular by feeding hydraulic fluid in the respect to a direction of flow of the hydraulic fluid after the
  • Valve seat given given given space This space, which is also referred to below as a valve chamber, is in front of an opening of the return valve on the one hand by the total piston area minus the partial piston area and the other by the total piston surface facing the valve seat including a limiting surface of the pressure increasing piston and optionally a surface given in this context Line section given.
  • the latter in any case as far as the pressure booster piston is arranged directly as part of the valve chamber. It can also be separated, for example, by a check valve hereof. There is preferably no actual feed of additional hydraulic fluid in the valve chamber. A mere reduction of the valve space by a movement of the pressure-increasing piston may be sufficient. This can also result in the required pressure increase.
  • the initial pressure increase preferably moves a piston of the return valve out of the valve seat, after which, as known in the art, a return port for the hydraulic fluid is released and the return hydraulic fluid is released from the valve seat surface, i. the partial piston surface, increased piston area of the return valve is acted upon and so keeps the return valve even with reduced pressure or decreasing the pressure in the open position.
  • the pressure increase to achieve the trigger pressure is therefore preferably only over a (with initially addressed) time narrowly limited area, which requires only such a period of time that the piston of the return valve is lifted from the sealing position.
  • the pressure increase may be performed by a method of a pressure-increasing piston.
  • This is preferably a movable pressure-increasing piston which acts on the hydraulic medium.
  • the pressure booster piston has to be abruptly moved. This can be done manually by the user, for example via a correspondingly provided lever arrangement.
  • an electromechanical displacement of the pressure-increasing piston is preferred.
  • the pressure increasing piston may be moved in a hydraulic fluid cylinder, which is hydraulically in constant communication with a return line of the hydraulic fluid.
  • the hydraulic medium flowing back after the return valve has been opened preferably counteracts the direction of travel of the pressure-increasing piston when the pressure is increased on the pressure-increasing piston.
  • the returning hydraulic fluid may assist in causing a return displacement of the pressure increasing piston to a home position.
  • this is preferred only when an application of force to the pressure booster piston is omitted.
  • an electromechanical displacement by an electromagnet this is for example given when the magnetic force has dropped.
  • the magnetic force drops at the usual setting and preferably only when the return valve is back in its closed position.
  • a negative pressure can be generated by the return displacement of the pressure increasing piston, so as to support a closing operation of the return valve or actively trigger.
  • said drop in magnetic force in the case of the described electromechanical design, may already be sufficient.
  • This can also contribute that a force acting on the pressure increasing piston return spring is provided.
  • a further displacement of the pressure increasing piston out of a basic position against the direction of pressure increase can be carried out, so as to provide one, optionally additional, To generate negative pressure and trigger the closing process of the return valve or support.
  • the pressure increasing piston may be moved via a drive separate from the drive of the hydraulic pump. Both drives can be electromechanical drives. Both drives are preferably operated via a common power supply.
  • the pressure booster piston can be moved linearly via a solenoid. Also in this regard, for example, a spindle drive may be provided for the linear displacement of the pressure increasing piston.
  • valve space communicates with the hydraulic medium reservoir via a separate non-return valve.
  • This check valve opens when the pressure in the valve chamber drops. For example, when the return valve is closed or closed, this check valve opens so as to allow the pressure-increasing piston to return relatively quickly to its original position. When the return valve is opened and the pressure of the returning hydraulic fluid is present, this check valve is closed thereby. The flow of the hydraulic fluid into the hydraulic fluid reservoir takes place via a drain opening released from the return valve.
  • a return of the moving part in response to a pressure value measured by the pressure sensor can be effected by a triggerable opening of the return valve and that the working pressure at which the opening of the return valve is triggered, is adjustable.
  • a working pressure can be selected that is different from the pressure in the hydraulic fluid, in which the return valve would anyway spent in its open position due to its structural design. Reference is also made to the above statements.
  • This pressure, in which the return valve is spent due to its structural design in the open position is referred to as the predetermined working pressure.
  • the selected, set working pressure can also, as already stated above, with the above Preselected working pressure to be chosen consistently. Regardless of the selected working pressure, the specified working pressure remains unchanged. It only plays no role as long as a selected working pressure below the specified working pressure or in accordance with this is provided.
  • This can be a setting wheel or a control slide, alternatively an arrangement of a plurality of keys, each key being assigned a predetermined working pressure.
  • a keyboard may be provided with an associated display.
  • An adjustment of the selectable working pressure may optionally be alternatively or additionally also via a non-mechanical interface, in particular a radio and / or optical interface to the device vorappelbar.
  • a display may be provided which reflects the actual selected working pressure.
  • the hand-operated switch is that switch that is to be operated by a user, in particular to press, to start a work operation of the device and (continue).
  • a termination of the return of the moving part is achieved by repeated operation. This can be achieved, in particular, by the fact that, when actuated again, the electrical voltage is applied to the actuating magnet. th, which acts on the pressure booster piston drops. This in any case when the opening and / or closing of the return valve is carried out as described above. By then entering backward displacement of the pressure increasing piston, the closing of the return valve can be effected.
  • This rearward displacement which is also or only largely caused by the pressure of the hydraulic fluid flowing in the valve chamber when the return valve is open or flowing through the valve chamber into the hydraulic fluid reservoir, then simultaneously ensures such a pressure drop in the valve chamber that the return valve closes.
  • a spring acting on the pressure-increasing piston in the direction of its starting position, in which, for example, no magnetic force acts, may be provided as support.
  • the return valve can also be opened mechanically, for example electromechanically, for example as a function of the detection of a cancellation of the switch application.
  • the return valve is acted upon directly, for example via a linkage, when the return valve is designed as a valve piston, for example via an associated piston rod.
  • Switching can be sensory. Also, for example, the motor current of a drive driving the hydraulic pump can be monitored. This in particular in the case that the operation of the hydraulic pump is directly dependent on the switch application. A discontinuation of the relevant motor current is considered as a waiver of the switch application. A signal can be generated to open the return valve.
  • the opening of the return valve may also, as further preferred, be achieved by increasing the hydraulic pressure acting on the return valve.
  • a corresponding contact or proximity sensor can be provided.
  • the motor current of the pump drive can be monitored.
  • the signal of a pressure sensor detecting the pressure in the hydraulic fluid can be evaluated for this purpose.
  • a detected significant increase can be evaluated as a workpiece contact.
  • the significant increase is characterized in particular by the fact that a previously given approximately linear increase in pressure is left when advancing the moving part.
  • the workpiece contact can, for example, be assumed if, based on a unit of time, the motor current or the named pressure is 2 or more percent higher than a linear increase projected from a preceding unit of time.
  • the pressure sensor is particularly preferably an electrical or electronic pressure sensor, more particularly a pressure sensor, which constantly performs a pressure measurement at certain time intervals when the device is switched on.
  • the time intervals can range from a few seconds to a few tenths of a second.
  • the time intervals are preferably in the range of one or a few milliseconds, for example in the range between 1 and 200 ms.
  • the sole release of the operating switch is sufficient.
  • the movement section is not only quiet, but at the same time moves back.
  • the return valve for example, via a piston rod directly connected to a valve piston, as indicated, or a similar linkage, on which piston rod or linkage acts a servo motor, be relocated to trigger the return movement of the moving member in the open position.
  • a complete return of the moving part is first waited before a next operation is released. For example, a predetermined fixed period of 5 or 10 seconds can be specified. Alternatively, it can also be determined via the pressure sensor whether the return has taken place (completely).
  • a possible (additional) hydraulic pressurization of the return valve to trigger a movement of the moving part back into the end position allows an energy-efficient work. Since the device as a whole does not necessarily have to work until the triggering pressure of the return valve has been reached, but the return can be initiated in a targeted manner when the intended processing has been carried out, significantly more machining operations can be carried out with an accumulator-operated hand-held device with a charged accumulator than with Solutions in which the fixed release pressure must always be achieved during every operation.
  • the shutdown can not always be done at the desired pressure despite a designated pressure sensor. If, for example, a pressure of 230 bar is desired, a pressure of, for example, 300 bar may still develop with corresponding inertia.
  • a shutdown at a certain pressure, such as the mentioned 230 bar is essential in particular in connection with punch rivets, since depending on the material, an overpressing of the rivet can otherwise occur.
  • the short-term pressure increase acting on the return valve results in a rapid pressure drop at the moving part given by opening the return valve.
  • the reaction ie the opening of the return valve, takes place in a time range of one or a few tenths of a second, in any event up to one second. It can also be a time range of a few milliseconds, for example two, four or ten milliseconds.
  • FIG. 1 shows an overall view of a hydraulically operated hand-held device in FIG. 1
  • FIG. 2 shows the enlarged section along the line II-II in Figure 1;
  • FIG. 3 shows the enlargement of region III in FIG. 2;
  • Figure 4 is a representation corresponding to Figure 2, upon movement of a moving part of the handset in a working position.
  • Fig. 5 is a representation corresponding to Figure 4, in an open
  • FIG. 6 shows the enlargement of the region VI in FIG. 5;
  • FIG. Fig. 7 the subviews against the handset according to arrow VII in Figure 1.
  • a hydraulically operated hand-held device 1 in the form of a pressing device with an electric motor 2, a hydraulic pump not shown in detail, and a hydraulic pump is shown and described.
  • Tel- reservoir 3 Tel- reservoir 3 and designed as a hydraulic piston movement part. 4
  • the moving part 4 is movable relative to a fixed part 5 formed by the apparatus housing, for example, the cylinder in which the hydraulic piston moves.
  • the movement part 4 is now, for example, the tool holder shown in Figure 1. It can also be, for example, the hydraulic piston (see about Figure 2).
  • the components hydraulic fluid reservoir 3, return valve 8, adjusting device 27 and possibly also further are housed in a not shown here in more detail device body K.
  • the hydraulic chamber 6 includes the space in which hydraulic fluid is pumped. This starts at the pressure side of the hydraulic pump. As shown, for example, in FIG. 2, the hydraulic chamber 6 has a return line 7, via which the hydraulic fluid can flow back into the hydraulic fluid reservoir 3 via a return valve 8. As can be seen in particular from FIGS. 4 and 5, the hydraulic chamber 6 changes with the working state of the hand-held device 1. In the illustration according to FIG. 4, the movement part 4 is in a position changed with respect to FIG. After opening the return valve 8 ( Figure 5), the hydraulic piston or the moving member 4 moves back in the direction of its rest position shown in Figure 2.
  • the hydraulic piston so far upstream space is included in the hydraulic chamber 6, but at the same time also with the return valve open the passage through the Valve seat and the space immediately in front of the return valve. 8
  • the electric motor 2 for operating the hydraulic pump and thus for moving the movement part 4 in the direction of the working position is activated via a switch 9, which is preferably designed as a manually operated pushbutton.
  • valve seat preferably consists of a screw-in part 12, which is screwed into the housing of the hand-held device 1 via a thread 11.
  • a flow bore 13 is provided in the valve seat, optionally in the screw 12, a flow bore 13 is provided. This is fluidly connected to the return line. 7
  • the return valve 8 opens only when a certain triggering pressure is exceeded. It is the specified working pressure mentioned above. This release pressure can be, for example, 600 or 700 bar.
  • the open return valve 8 is already held in the open position by a very low pressure in the return line 7, for example a pressure of 2 to 5 bar.
  • the valve needle 14 does not have to be ideally tapered. In any case, it is preferably cone-shaped.
  • This pressure is preferably generated during the return of the moving part 4 by acting on the moving part 4 and the moving part 4 in the end position stressing spring 16.
  • the pressure is again significantly lower.
  • the pressure, in particular at the beginning of the return of the moving part is only 3/4 or less of the pressure before the flow bore 13 or the valve seat, in practice, for example, about half.
  • this pressure difference is substantially equalized thereafter and, as a rule, is only comparatively small soon after the beginning of the return of the moving part.
  • space 26 After opening the return valve 8 of the adjoining the flow hole 13 space 26 is included to the lower surface 17 of the return valve piston 15 in the hydraulic chamber. The hydraulic medium then flows via a drain opening 18 into the storage space 3.
  • the space 26 is referred to above and below as a valve chamber.
  • an axial bore 19 passing through the lower surface 17 and allowing it to be prevented from kicking back allows a flow of hydraulic fluid from the hydraulic fluid reservoir into the valve chamber 26, in particular to facilitate a return of the pressure-increasing piston 22 (see also FIG further down).
  • valve needle 14 corresponds to the valve seat lifting hydraulic or release pressure the said predetermined working pressure on the moving part. 4
  • a further line 20 filled with hydraulic fluid is preferably assigned to the hydraulic space adjoining the flow bore 13 in the outflow direction.
  • This line 20 continues into a hydraulic medium cylinder 21, in which the already mentioned pressure increasing piston 22 is preferably linearly displaceable.
  • the line 20 could also be shorter than shown or even omitted.
  • the line 20 hydraulically forms part of the space 26.
  • the handset 1 preferably has an adjusting device 27, by means of which the maximum working pressure applied to the movement part 4 can be preset by the user.
  • a plurality of keys 28 are provided for this purpose, to which keys 28 predetermined pressure values are stored. With the adjustment can be adjusted according to the above-described selected, compared to the predetermined working pressure modified (or in individual cases also hereby matching) working pressure. On the other, possibly alternative possibilities of the aforementioned radio link, etc., reference is also made at this point. For example, a working pressure of 200 bar or 300 bar leading to the triggering of the return valve can be preselected.
  • An evaluation / control electronics evaluated in the course of movement of the moving part 4 in the direction of the working position pressure readings of a pressure sensor 29 and compares them with the set via a button 28 pressure setpoint.
  • the pressure-increasing piston 22 abruptly moves into the advancing position according to the illustrations in FIGS. 5 and 6. As a result, the pressure-increasing piston 22 moves into a close, practically circumferentially sealed, cooperation with the piston Hydraulic fluid cylinder 21 of the line 20. Before the pressure increasing piston 22 located hydraulic fluid is displaced in a direction of the pressure increasing piston 22 in the direction of the return valve 8, and thus in the illustrated embodiment in the space "to" the flow hole 13.
  • valve needle 14 is then lifted from the valve seat, so that the return of the hydraulic fluid from the hydraulic chamber 6 can be carried back into the hydraulic fluid reservoir 3, in which case the return valve 8 is held in the raised position until the moving part 4, the end position according to 2 and thus the opening holding pressure for the return valve 8 is reached.
  • the pressure increase at the return valve 8 by the pressure increasing piston 22 acts initially. With raising the return valve 8 and concomitant connection of the space 26 with the drain opening 18 with simultaneous opening of the flow hole 13 of the prevailing through the return of the moving member 4 pressure acts on the return valve. 8
  • the electrical loading of the actuating magnet 23 can also be initially pulse-shaped, so that after complete advance of the pressure increasing piston 22, this is almost suddenly in the forward position shown in FIG 6. With a regular expiration of a working cycle, so if in particular no premature termination of the return of the moving part is desired, the pressure increasing piston 22 remains in this position preferably according to so long also given admission of the solenoid 23.
  • the pressure booster piston 22 can move back into its initial position accordingly prematurely.
  • the associated enlargement of the valve chamber 26 can provide for such a pressure drop, that thereby a desired closure of the return valve 8 is achieved.
  • a flow path from the hydraulic fluid reservoir 3 into the valve chamber 26 preferably also opens at the same time in order to supply the valve chamber 26 with the required hydraulic medium, which makes possible said return movement of the pressure increasing piston 22.
  • This flow path can be provided by a non-return valve arranged in the valve piston and / or a connection path from the hydraulic medium reservoir 3 to the line 20.
  • the forward movement of the moving part 4 in the working position is preferably maintained only as long as the user actuates the switch 9.
  • a signal is generated, which leads to a control of the actuating magnet 23 and thus via the pressure increasing piston 22 to a pressure increase in the space 26.
  • the return valve 8 is displaced into the open position, which leads to an automatic return of the moving part 4 to the end position.
  • the pressure increasing piston 22 may be arranged transversely to the return valve 8.
  • the longitudinal axes of pressure increasing piston 22 and return valve 8 intersect outside of the respective extension ranges. This supports a desired compact design.
  • a method characterized in that the increase of the hydraulic pressure is performed by a method of a pressure-increasing piston 22.
  • a method which is characterized in that the cancellation of the application of a switch or push button by the user at the same time an opening of the return valve and a return of the moving part 4 is triggered.
  • a method which is characterized in that the return of the moving part 4 is triggered only when a first workpiece contact was previously detected on the device side.
  • a hand-held device which is characterized in that the hydraulic pressure acting on the return valve 8 can be increased independently of reaching the predetermined working pressure to a pressure value which causes an opening of the return valve 8.
  • a hand-held device which is characterized in that a movable pressure-increasing piston 22 is provided for increasing the pressure.
  • a hand-held device characterized in that the pressure-increasing piston 22 is movable in a hydraulic fluid cylinder 21 which is hydraulically in constant communication with a return line 7 of the hydraulic fluid.
  • a hand-held device which is characterized in that the pressure-increasing piston 22 is movable via a separate drive to a drive of the hydraulic pump.
  • a hand-held device which is characterized in that the pressure-increasing piston 22 is movable via a control magnet 23.
  • a hand-held device which is characterized in that the usable to increase the pressure value on the return valve 8 hydraulic volume via a check valve 30 with the hydraulic fluid reservoir 3 is in communication.
  • a hand-held device which is characterized in that a return of the movement part 4 as a function of one of the pressure sensor 29 measured Pressure value can be effected by a releasable opening of the return valve 8 and that the working pressure at which the opening of the return valve 8 is triggered, deviating from the predetermined working pressure is selectable.
  • a hand-held device which is characterized in that an adjusting device 27 is provided for different selected working pressures.
  • a hand-held device which is characterized in that by reversing the application, a return of the moving part 4 can be triggered.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Press Drives And Press Lines (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
  • Fluid-Driven Valves (AREA)
  • Safety Valves (AREA)

Abstract

L'invention concerne en premier lieu un procédé servant à faire fonctionner un appareil portatif (1) à fonctionnement hydraulique, par exemple un appareil de pressage et/ou un appareil de perforation ou de découpage. L'appareil portatif (1) comporte une pompe hydraulique, une partie mobile (4), une partie immobile (5) et une soupape anti-retour (8) pourvue d'un siège de soupape associé. La partie mobile (4) est déplacée dans une position de travail sous l'effet d'une pression hydraulique établie résultant du remplissage d'un espace hydraulique (6) d'un agent hydraulique provenant d'un réservoir (3) en utilisant la pompe hydraulique, ce qui peut donner lieu au retour de manière autonome de la position de travail dans une position de fin de course de la partie mobile (4) quand une pression de travail prédéfinie est atteinte par une ouverture de la soupape anti-retour (8). L'invention peut également prévoir un capteur de pression. L'invention peut également prévoir qu'un cycle de travail est déclenché par une contrainte exercée sur un commutateur par une main d'un utilisateur. L'invention vise à permettre, pour une structure simple de l'appareil, l'usinage de pièces différentes en particulier en termes de dimension et/ou de matériau ou de simplifier la manutention. À cet effet, la pression hydraulique agissant sur la soupape anti-retour (8) servant à déclencher un déplacement de la partie mobile (4) dans la position de fin de course est élevée indépendamment du fait que la pression de travail prédéfinie est atteinte. L'invention concerne en outre un appareil portatif à fonctionnement hydraulique.
EP16703952.8A 2015-02-27 2016-02-05 Procédé d'employer un outil hydraulique et outil hydraulique Active EP3261804B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015102806.9A DE102015102806A1 (de) 2015-02-27 2015-02-27 Verfahren zum Betreiben eines hydraulisch betriebenen Handgerätes sowie hydraulisch betriebenes Handgerät
PCT/EP2016/052450 WO2016134951A1 (fr) 2015-02-27 2016-02-05 Procédé servant à faire fonctionner un appareil portatif à fonctionnement hydraulique, ainsi qu'appareil portatif à fonctionnement hydraulique

Publications (2)

Publication Number Publication Date
EP3261804A1 true EP3261804A1 (fr) 2018-01-03
EP3261804B1 EP3261804B1 (fr) 2022-02-09

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Application Number Title Priority Date Filing Date
EP16703952.8A Active EP3261804B1 (fr) 2015-02-27 2016-02-05 Procédé d'employer un outil hydraulique et outil hydraulique

Country Status (10)

Country Link
US (1) US10688646B2 (fr)
EP (1) EP3261804B1 (fr)
KR (1) KR102507205B1 (fr)
CN (1) CN107405761B (fr)
AU (1) AU2016223762B2 (fr)
BR (1) BR112017016224A2 (fr)
CA (1) CA2978061A1 (fr)
DE (1) DE102015102806A1 (fr)
MX (1) MX2017010905A (fr)
WO (1) WO2016134951A1 (fr)

Families Citing this family (10)

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DE102016117313A1 (de) 2016-01-28 2017-08-03 Gustav Klauke Gmbh Verfahren zum Betrieb eines Arbeitsgerätes und Arbeitsgerät
DE102017112481A1 (de) 2016-10-07 2018-04-12 Gustav Klauke Gmbh Verfahren zum Betreiben eines motorisch betätigten Hand-Verpressgerätes
EP3333994B1 (fr) * 2016-12-09 2020-03-18 CEMBRE S.p.A. Tête de travail pour outil de coupe ou de compression
NO20170884A1 (no) 2017-05-30 2018-06-25 Talgoe Teknologi As Apparat for hulltaking i et langstrakt rørformet legeme og framgangsmåte for bruk av apparatet
DE102018102162A1 (de) 2017-10-02 2019-04-04 Gustav Klauke Gmbh Handwerkzeug
EP3746268A1 (fr) * 2018-01-30 2020-12-09 Milwaukee Electric Tool Corporation Outil électrique
DE102018114014A1 (de) 2018-06-12 2019-12-12 Gustav Klauke Gmbh Zur Fernbedienung vorbereitetes Handwerkzeug sowie zur Fernbedienung vorbereitetes Werkzeug
DE102018118677A1 (de) * 2018-08-01 2020-02-06 Gustav Klauke Gmbh Verfahren zum Betrieb eines hydraulisch betätigten Arbeitsgerätes
CN110477999B (zh) * 2019-08-29 2021-07-02 湖南瀚德微创医疗科技有限公司 一种输出恒定夹持力的手术夹钳
WO2023237777A1 (fr) 2022-06-10 2023-12-14 Gustav Klauke Gmbh Procédé pour faire fonctionner un outil actionné par moteur, et outil actionné par moteur

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Also Published As

Publication number Publication date
US20180236649A1 (en) 2018-08-23
EP3261804B1 (fr) 2022-02-09
BR112017016224A2 (pt) 2018-03-27
CN107405761A (zh) 2017-11-28
CA2978061A1 (fr) 2016-09-01
MX2017010905A (es) 2017-11-24
WO2016134951A1 (fr) 2016-09-01
DE102015102806A1 (de) 2016-09-01
AU2016223762B2 (en) 2020-06-25
KR20170123659A (ko) 2017-11-08
US10688646B2 (en) 2020-06-23
KR102507205B1 (ko) 2023-03-06
CN107405761B (zh) 2019-08-30
AU2016223762A1 (en) 2017-09-14

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