DE102013002273A1 - Motor-driven hydraulic pump for driving hydraulic tool, particularly hydraulic wrench, has motor, pump block and power electronics, where power electronics is connected with touch display controller by interface - Google Patents

Abstract

The motor-driven hydraulic pump has a motor (4), a pump block (6) and power electronics (2). The power electronics is connected with a touch display controller (1) by an interface. The touch display controller is removable. A remote control (8) is connected with a power electronics. The remote control communicates with the hydraulic pump wirelessly. The touch display controller is connected with the power electronics by an interface cable. A pressure gauge (7) is mounted for a redundant display of the pressure.

Description

Hydraulic pump with touch display control for process parameterization and process visualization for hydraulic tools, such as: hydraulic wrench

State of the art

Prior art hydraulic pump systems are used to drive and control hydraulic tool components. For the parameterization z. B. of Schraubprozessparametern the aggregate is resorted to various input options that allow operation, but often complicated, time-consuming, confusing and error prone.

Furthermore, there are no systems that are able to completely and completely without additional peripherals such as scanner, keyboard, PC, laptop, card reader or camera to ensure quick and easy operator guidance in all known screwing, partly because a complex parameterization of the screwing required and the input possibility is limited. State-of-the-art pumps do not offer the possibility of using the entire input module as an external decentralized tool for pump control and process data visualization of the tightening process. Furthermore, prior art hydraulic pump systems with known industrial interfaces can not be controlled remotely via a higher-level controller without intermediate components, which would, however, often be expedient, in particular in production lines.

• a) Ein eingeschränkter Funktionsumfang zu den oben genannten Punkten besteht und/oder
• b) Eingaben sehr zeitaufwändig sind und/oder
• c) Zusatzperipherie oder -systeme zwingend erforderlich sind und/oder
• d) Anwender mit der Bedienung überfordert sind und/oder
• e) Anwender mit der Fehleranalyse überfordert sind und/oder
• f) Die Visualisierung der Prozessdaten ungenügend ist

As a result, state-of-the-art systems either:

• a) A limited range of functions exists for the abovementioned points and / or
• b) inputs are very time consuming and / or
• c) additional peripherals or systems are mandatory and / or
• d) users are overwhelmed with the operation and / or
• e) Users are overwhelmed with the error analysis and / or
• f) The visualization of the process data is insufficient

• – Drehmoment-gesteuertes Anziehen
• – Drehmoment-Drehwinkel-gesteuertes Anziehen
• – Streckgrenzen-gesteuertes Anziehen
• – Vorspannkraft-gesteuertes Anziehen; unterstützt werden folgende Sensoren: • Load Cell (hydraulisch) • Load Cell (kapazitiv) Patent Nr. DE 198 54 062 C1 • Kraftmessdosen mit Strom- oder Spannungsschnittstellen • Ultraschall-Längenmessung • Dehnmesstreifen • Piezoelektrische Sensoren
• – Standardverfahren (Anziehen nach Hydraulikdruck)

Known tightening methods with parameter input and parameter visualization are:

• - Torque-controlled tightening
• - Torque-rotation-controlled tightening
• Yield strength controlled tightening
• - preload-controlled tightening; The following sensors are supported: • Load Cell (hydraulic) • Load Cell (capacitive) Patent No. DE 198 54 062 C1 • Load cells with current or voltage interfaces • Ultrasonic length measurement • Strain gauge • Piezoelectric sensors
• - standard procedure (tightening according to hydraulic pressure)

Nowadays a simple intuitive input, control and visualization of screwing plays an increasingly important role, since the demands on the functionalities of the systems extremely high and ways for a good operability are required, firstly not to overburden a mechanic with the growing range of functions and to ensure other fast work processes. Partly, the space in which a hydraulic pump systems are used, so tight that an operator even on site the operating state, the process parameters and such information during operation can not see and laborious to produce process data or images needed to the progress of the screwing judge.

It is already used in various systems, such as in injection molding machines, extruders or other machines that are operated indoors, on PC architectures and touch display controls, but due to the harsh environmental conditions in which a mobile pump is used, the small installation space and specifically coordinated technology necessary could not be used because the known prior art systems were not suitable for this purpose.

Description of the invention:

The present invention avoids these disadvantages and is based on the 1 and 2 described. This is a system which is equipped with a touch display controller for parameterization, control and visualization of the process data. The graphical user interface (GUI for short) is implemented via the touch display and only a few additional keys. Advantageously, the standard industrial interfaces are provided by this system to ensure the increasing demands on documentation and remote control of a hydraulic unit. In a further advantageous manner, the operating concept of this hydraulic pump is designed such that the operator is intuitively, quickly, easily and playfully acquainted with the functional scope of the system. The operating concept could be based on that of a smartphone.

As portable hydraulic power packs are used under the most severe and demanding environmental conditions, different techniques are required to make the touch display controller suitable for these operating conditions. Among other things, this includes designing the electronics so that it meets the thermal, vibration and climatic requirements. This is achieved, for example, in that the recording of the processor board with a power board architecture could be vibration-isolated by means of damping elements in the electronics housing, since otherwise due to the high acceleration forces due to vibration component detachment would occur. It would be possible for recesses to be provided in the board, which accommodates components of the power board architecture, as well as in the element accommodating the board. The recesses could then receive damping elements which simultaneously hold the board in the female element. However, the damping elements could additionally or alternatively be arranged at other coupling points.

In addition, critical components could be glued or potted to reduce the risk of components becoming loose due to vibration.

In order to meet the necessary EMC industry standards in the tight installation conditions of a Powerboardarchitecture, it might be possible to choose an at least 6-layer printed circuit board construction in order to be able to ensure particularly good interface reliability, the protection circuits as close as possible to the interference source / inputs / outputs to be able to position and / or build as small as possible.

For the touch operation, a special humidity-insensitive touch controller could be used, which does not trigger misdetections due to drops of water, for example during rain or condensation.

The high temperature requirements could be achieved by using automotive components in the construction of the touch panel, which cover a high temperature range.

A protective glass cover for touch sensor and display could be made either by a particularly resistant safety glass or by means of a tough plastic disk.

Furthermore, all interfaces for touch display control via waterproof cover could be reached, which ensure a tight seal to the electronics in the event of rain in the unused state.

Additionally or alternatively, the touch display controller could be constructed so that it can be removably mounted on a pump for possibly decentralized visualization and / or control in a separate housing. Thus, the control of the pump can be done away from the place of installation of the pressure generator.

To ensure a function according to the Machinery Directive, this could also be implemented on the power electronics processor with the appropriate industrial interface, so that the pump immediately falls back into a safe status for the operator in the event of a communication failure or communication error between the touch display controller and the power electronics no risk of injury to the user arises.

A manual remote control could have a master status in all operating states to ensure machine safety. This is ensured by an analog control circuit of the remote control, which can activate the motor and thus the forward stroke only by actively pressing the remote control. The touch display controller could not automatically activate the motor, but only deactivate the motor or initiate the return stroke, both of which represent a safe state and in terms of the Machinery Directive is required for such systems.

• – Erzeugung hydraulischen Drucks zum Antrieb von hydraulischen Werkzeugen
• – Schraubprozessdokumentation mittels Endwertdokumentation, Verlaufsdokumentation, Videodokumentation, alphanumerischer Zusatzeingaben
• – Vollautomatische Schraubprozesssteuerung eines oder mehrerer Werkzeuge aller bekannten und bereits genannten Schraubverfahren
• – Schutz der Pumpe durch Auswertung zusätzlicher Sensoren (wie z. B. Übertemperatur, Füllstand...etc.).
• – Visualisierung der unterschiedlichen Schraubprozessabläufe mit Statusmeldungen
• – Fernsteuerbarkeit des Aggregates durch ein abnehmbares Bedienpanel
• – Gesicherter Funkbetrieb für kabellose Fernsteuerbarkeit des Aggregates

The object of the invention is to provide an improved hydraulic pump system. This could be achieved, for example, by one, two or more measures:

• - Generation of hydraulic pressure to drive hydraulic tools
• - Screw process documentation by end value documentation, historical documentation, video documentation, alphanumeric additional inputs
• - Fully automatic screwing process control of one or more tools of all known and already mentioned screwing
• - Protection of the pump by evaluating additional sensors (such as overtemperature, level ... etc.).
• - Visualization of the different screwdriving processes with status messages
• - Remote controllability of the unit through a removable control panel
• - Secure radio operation for wireless remote controllability of the unit

The invention will be explained in more detail with reference to an embodiment and associated drawings. Showing:

1 in a schematic, perspective view of an inventive hydraulic pump system and

2 in a schematic, perspective view of an inventive hydraulic pump system with removed touch display control.

• – Alphanumerische Eingaben
• – Vollumfängliche Parametrisierung der Pumpe
• – Vollumfängliche Datenausgabe
• – Datenimport
• – Datenexport
• – LAN
• – WLAN
• – RFID-Reader
• – Druckerschnittstelle
• – USB-Schnittstelle
• – CAN-Schnittstelle
• – RS485-Schnittstelle
• – RS232-Schnittstelle
• – Interne Schnittstelle zur Leistungselektronik
• – Monitorschnittstelle
• – Externe numerische Eingabemodule
• – Externe alphanumerische Eingabemodule
• – Externe Kameramodule zur Prozessvisualisierung
• – Scanner
• – Festplatten
• – MMC Reader/Writer
• – SD-Card Reader/Writer
• – Funkfernbedienungen nach industriellem Standard
• – Funkmodule
• – Drehwinkelsensoren
• – Ultraschallmesssysteme
• – Kraftsensoren
• – Drucksensoren
• – Wegmesssysteme
• – Beschleunigungssensoren
• – Lagesensoren
• – Touch
• – Display
• – Endtaster
• – 0...10 V Schnittstelle für externe Sensoren
• – 4...20 mA Schnittstelle für externe Sensoren

The hydraulic pump consists of various electromechanical assemblies, which may also have a different arrangement as shown in the picture. To drive the pump is a motor ( 4 ), preferably with a lying in the oil stator winding, which is connected to a pump block ( 6 ), which is the carrier of the pressure generator. The arrangement is with a cooler ( 5 ), which reduces the hydraulic fluid temperature, connected. Furthermore, an additional reservoir ( 3 ), which increases the usable oil volume of the pump. The power electronics ( 2 ) contains the controlling components of the engine and parts of the signal processing as well as an industrial interface for communication with the touch display control ( 1 ). About the remote control ( 8th ) the pump can be controlled. By means of a manometer ( 7 ), the applied pressure is visualized. The in special cases also removably executed touch display control ( 1 ) is executed as a central input element for the process parameters and includes z. For example, a Power PC architecture and numerous industrial interfaces for data exchange. In the touch display control ( 1 ) one, two or more of the following functions and / or interfaces are realized:

• - Alphanumeric inputs
• - Full parameterization of the pump
• - Full data output
• - Data import
• - Data export
• - LAN
• - WIRELESS INTERNET ACCESS
• - RFID reader
• - Printer interface
• - USB interface
• - CAN interface
• - RS485 interface
• - RS232 interface
• - Internal interface to power electronics
• - Monitor interface
• - External numeric input modules
• - External alphanumeric input modules
• - External camera modules for process visualization
• - Scanner
• - Hard disks
• - MMC Reader / Writer
• - SD Card Reader / Writer
• - Radio remote controls to industrial standard
• - Radio modules
• - Angle of rotation sensors
• - Ultrasonic measuring systems
• - Force sensors
• - Pressure sensors
• - Position measuring systems
• - acceleration sensors
• - Position sensors
• - Touch
• - Display
• - End button
• - 0 ... 10 V interface for external sensors
• - 4 ... 20 mA interface for external sensors

The physical interfaces are from the housing of the touch display controller ( 1 ). Is the touch display control ( 1 ) removed from the hydraulic pump finds the exchange of data between power electronics ( 2 ) and touch display ( 1 ) by means of the interface cable ( 9 ) instead of. When removed, the touch display control ( 1 ) the function of a remote control console with process data visualization and additional switching elements, which take over the function of the remote control. In this mode, the remote control ( 8th ) not needed and is deselected. In the standard operating case, however, the fitter works with the smaller remote control ( 8th ) and the touch display control ( 1 ) is firmly attached to the pump.

The process status display is then displayed via signaling means, preferably green and red LEDs, on the symbolically represented remote control ( 8th ) realized. In the case of an error, the operator can change the screw thread via the touch display control ( 1 ) consider. In monitor mode, the touch display control ( 1 ) and placed at any location as a monitor. In this operating mode, the remote control ( 8th ) the controlling element for the parent start and stop of the screwing operation.

The screwdriving process data is stored on the integrated internal memory of the touch display controller ( 1 ), on the other to connected storage media.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 19854062 C1 [0005]

Claims (13)

Motor-driven hydraulic pump with a motor ( 4 ), Pump block ( 6 ) and power electronics ( 2 ), characterized in that the power electronics via an interface with a touch display control ( 1 ) connected is. Hydraulic pump according to claim 1, characterized in that the touch display controller ( 1 ) is removable. Hydraulic pump according to claim 1 or 2, characterized in that a remote control ( 8th ) with the power electronics ( 2 ) connected is. Hydraulic pump according to one of claims 1 to 3, characterized in that the remote communicates wirelessly with the hydraulic pump. Hydraulic pump according to one of claims 1 to 4, characterized in that the touch display control ( 1 ) with an interface cable ( 9 ) with the power electronics ( 2 ) connected is. Hydraulic pump according to one of claims 1 to 5, characterized in that for a redundant display of the pressure, a further pressure gauge ( 7 ) is mounted. Hydraulic pump according to one of claims 1 to 6, characterized in that the pump is controlled by external sensors, not shown, via the existing interfaces. Hydraulic pump according to one of claims 1 to 7, characterized in that the pump can transmit all process data via standard industrial interfaces, not shown, to external electronic equipment. Hydraulic pump according to one of claims 1 to 8, characterized in that the pump can set and regulate the pump pressure electronically parameterized by means of the integrated control. Hydraulic pump according to one of claims 1 to 9, characterized in that the pump via standard industrial interfaces, not shown, can read electronic input device. Hydraulic pump according to one of claims 1 to 10, characterized in that the processor board of the touch display controller is connected by means of damping elements with the housing. Hydraulic pump according to one of claims 1 to 11, characterized in that the touch controller used supports a technology which is insensitive to water, steaming and dirt. Hydraulic pump according to one of claims 1 to 12, characterized in that the PCB used for the control is realized with an at least 6-layer multilayer board.

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