WO2018215362A1

WO2018215362A1 - Rail grinding machine, and grinding method

Info

Publication number: WO2018215362A1
Application number: PCT/EP2018/063183
Authority: WO
Inventors: Dieter Ludwig KAMML; Christian Gerhard HAUSBERGER; Thomas HÖLZLWIMMER
Original assignee: Robel Bahnbaumaschinen Gmbh
Priority date: 2017-05-26
Filing date: 2018-05-18
Publication date: 2018-11-29
Also published as: EP3631088A1; DE102017208906A1

Abstract

The invention relates to a rail grinding machine (1) having a grinding assembly (11) with a rotatable grinding tool (14) and an adjusting drive (13) for adjusting the position of the grinding tool (14) in order to grind rails (2) of a track. The grinding assembly (11) is mounted on a machine frame (3) which can be manually moved on the rails (2) by means of guide rollers (4). A signal transmitter (20) generates at least one control signal which is provided to a controller (16). The position of the grinding tool (14) is adjusted automatically by means of the controller (16) on the basis of the at least one control signal by actuating the adjusting drive (13).

Description

RAIL GRINDING MACHINE AND GRINDING PROCESS

The present patent application claims the benefit of German Patent Application DE 10 2017 208 906.7, the contents of which are incorporated herein by reference.

The invention relates to a rail grinding machine and a method for grinding rails of a track.

From EP 0 743 395 A1 a rail grinding machine is known, which moves manually on a rail and is moved back and forth at the grinding point. For grinding, the rail grinding machine has a grinding tool that can be adjusted by means of an electrically operated adjusting drive. The adjustment of the adjustment drive is remotely controlled by an operator by means of a button, so that the required for grinding contact pressure of the grinding tool is adjustable to the rail by the operator. The remotely controlled adjustment of the grinding tool requires a high level of operator attention, as an inaccurate adjustment of the grinding tool affects the grinding quality and in particular leads to an uneven grinding contour.

The invention has for its object to provide a rail grinding machine with improved ease of use and improved sanding quality.

This object is achieved by a rail grinding machine with the features of claim 1. The position adjustment of the grinding tool by means of the control device automatically. The tax tion, the at least one control signal generated by the signal generator is provided. The control device actuates the actuator as a function of the at least one control signal, so that the position adjustment of the grinding tool is user-friendly and automatic. Due to the fact that the signal transmitter does not control the actuator itself remotely, but the at least one control signal generated by the signal generator is first provided to the control device, which then carries out the position adjustment automatically by actuating the actuator, the operator is relieved and operator error is avoided, whereby the ease of use and the welding quality can be improved.

A rail grinding machine according to claim 2 ensures a high level of operating comfort and optimizes the grinding quality. Because at least one parameter is stored in the control device, the automatic position adjustment of the grinding tool takes place in a desired manner as a function of the at least one parameter. The at least one parameter is preferably adjustable via an operator interface of the control device. The at least one parameter is in particular a grinding position in which the grinding tool is in engagement with the rail to be ground, an idling position in which the grinding tool is not in engagement with the rail to be ground, a stroke which determines the distance between the grinding position and the grinding position Characterized idle position in a direction of adjustment, a stroke duration that characterizes the time duration for performing the stroke, and / or a stroke speed, ie the speed at which the grinding tool is moved in the direction of adjustment. Preferably, at least two parameters selected from the grinding position, the neutral position and the stroke and at least one parameter selected from the stroke duration and the stroke speed are stored. A rail grinding machine according to claim 3 allows in a simple way improved ease of use and improved grinding quality. Upon a first actuation of the switch, the control device is provided with a first control signal, whereupon the control device actuates the actuator such that the grinding tool is displaced into a grinding position. In a subsequent second actuation of the switch, a second control signal is provided to the control device, whereupon the control device actuates the actuator such that the grinding tool is displaced into an idling position. Preferably, the buzzer is a button which must be pressed and held by an operator to generate the first control signal. The second control signal is generated by releasing the pressed button. The button automatically returns to its original position after being released, so that the first control signal can be generated again by pressing it again.

A rail grinding machine according to claim 4 ensures a high level of operating comfort and optimizes the grinding quality. Characterized in that the signal generator is designed as an acceleration sensor, a first control signal is automatically generated at the beginning of the move, so when the rail grinding machine is accelerated by a user. The first control signal is provided to the control device, whereupon the control device actuates the actuator such that the grinding tool is displaced to a grinding position. At the end of the shift, that is, when an operator delays or decelerates the rail grinding machine, the acceleration sensor automatically generates a second control signal. The second control signal is provided to the control device, whereupon the control device actuates the actuator such that the grinding tool is displaced into an idling position. Relocating the Grinding tool in the grinding position and the idle position is thus directly coupled to the sliding movement. The first control signal and the second control signal in the control device are preferably compared with a respective threshold value and are actuated by the control device only when the respective threshold value is exceeded in the absolute value. As a result, a high reliability is ensured because speed variations in the manual movement of the rail grinding machine do not lead to an unwanted actuation of the actuator.

A further object of the invention is to provide a method for grinding rails of a track with improved ease of use and improved grinding quality. This object is achieved by a method having the features of claim 5. The advantages of the method according to the invention correspond to the already described advantages of the rail grinding machine according to the invention. The method can in particular also be developed with the features of at least one of claims 2 to 4.

A method according to claim 6 ensures a high ease of use and optimum grinding quality. Because the control device actuates the actuator as a function of the at least one parameter, the grinding is optimized in a desired manner. Preferably, the at least one parameter can be set via an operator interface of the control device.

A method according to claim 7 ensures improved ease of use and improved grinding quality. Will the controller provided the first control signal, this actuates the actuator so that the grinding tool is automatically shifted to the grinding position. On the other hand, if the control device is provided with the second control signal, then it actuates the actuator such that the grinding tool is displaced into the idling position. As a result, the grinding process is carried out automatically.

A method according to claim 8 ensures in a simple manner improved ease of use and improved grinding quality. In particular, the key is designed in such a way that it is automatically returned to its initial position after it has been released by an operator. The first control signal is thus generated by pressing and holding the button, whereas the second control signal is generated by releasing the button. Thereafter, the button is ready for another press by an operator to re-generate a first control signal.

A method according to claim 9 ensures a high ease of use and optimizes the grinding quality. The acceleration sensor detects an acceleration of the rail grinding machine and automatically generates the first control signal. Similarly, the acceleration sensor detects a deceleration of the rail grinding machine and generates the second control signal. The displacement of the grinding tool into the grinding position and the idling position is thus directly coupled to the sliding movement of the rail grinding machine.

Further features, advantages and details of the invention will become apparent from the following description of several embodiments. Show it: 1 is a side view of a rail grinding machine according to a first embodiment, in which a signal generator is designed as an acceleration sensor,

Fig. 2 is a schematic representation of a sliding movement of

Rail grinding machine of FIG. 1, and a schematic representation of a sliding movement of a rail grinding machine according to a second embodiment, in which the signal generator is designed as a button.

Hereinafter, a first embodiment of the invention will be described with reference to FIGS. 1 and 2. A rail grinding machine 1 is used for

Grinding in each case a rail 2 of a track and has a machine frame 3, which is guided over guide rollers 4 on the rail 2. The machine frame 3 is supported via a transverse arm not shown on the other rail of the track, which is not shown. On the machine frame 3, a handle 5 is mounted, by means of which the grinding machine 1 in a longitudinal direction L or L 'on the rails 2 by an operator is manually displaceable.

In the machine frame 3, a grinding unit 6 is pivotally mounted about a pivot axis 7 parallel to the rail 2. The grinding unit 6 has a support bracket 8, which is mounted at its ends in pivot bearings 9, which are attached to the machine frame 3. The pivot bearings 9 define the pivot axis 7 and are on track rollers 10 on the rail 2. The upwardly bent support bracket 8 carries approximately centrally a sanding unit 1 1. The sanding unit 1 1 has an electrical rule drive motor 12 and arranged above this actuator 13. The actuator 13 is also designed as an electric drive motor. Below the drive motor 12, a grinding tool 14 is arranged, which is formed in particular as a pot grinding wheel. The pivoting movement of the support bracket 8 with the grinding unit 1 1 is done manually via a pivot spindle drive 15th

For controlling the drive motor 12 and the actuator 13, the rail grinding machine 1 has a control device 16, which is fastened to the machine frame 3. The control device 16 comprises an operator interface 17, a memory unit 18 and a control unit 19, which are shown only schematically in FIG. The control device 16 is for actuating the drive motor 12 and the actuator 13 in signal communication therewith. The control device 16 is also in signal connection with a signal generator 20, which is designed as an acceleration sensor. The signal generator 20 is arranged in the control device 16. The signal generator 20 is used to generate control signals Si, S ₂ , in dependence of which the control device 16 actuates the actuator 13 and automatically adjusts a position of the grinding tool 14 in a direction perpendicular to the longitudinal direction L or L 'extending direction V or V. For automatic position adjustment, at least one parameter P is stored in the memory unit 18, which can be set via the operator interface 17. The at least one parameter P is in particular a grinding position ys, an idling position VL, a stroke Ay, a stroke duration At and / or a lifting speed v _y .

The electrical power supply of the drive motor 12, the actuator 13, the control device 16 and the signal generator 20 is provided by a power supply module, which is attached to the aforementioned cross-arm. is orders. Such an energy supply module is known for example from DE 20 2016 005 841 Ul.

The operation of the rail grinding machine 1 will be described below with reference to FIG.

The rail 2 has material to be abraded M, which is present for example as a result of a weld bead on the rail 2. The material M to be abraded is shown exaggerated in the xy-diagram in FIG. 2, wherein the x-axis characterizes a flat desired ground contour of the rail 2 in the longitudinal direction L or L 'and the y-axis in the in FIG 1 illustrated pivot position of the support bracket 8, the adjustment direction V or V and thus the position of the grinding tool 14 characterized. The material to be abraded M specifies a grinding distance Δχ, within which the rail grinding machine 1 has to be displaced from a first position xi to a second position x ₂ in the longitudinal direction L and has to be shifted back from the second position x ₂ to the first position xi. To abrade the material M, the grinding tool 14 must be pressed by the actuator 13 with a contact pressure against the rail 2. In order to achieve the continuously and in particular evenly running desired ground contour, the grinding tool 14 at the respective end of the grinding path Δχ must be displaced from a grinding position ys to an idling position yL. The grinding position ys and the idling position yL are illustrated in the xy chart in FIG. For a stroke Ay: Ay = y _L - ys.

For grinding, the rail grinding machine 1 is shifted by a user from the position xi in the longitudinal direction L and accelerated to a speed v _x . Manually moving the Rail grinding machine 1 takes place by means of the rotatably mounted guide rollers 4. The acceleration is detected by the acceleration sensor, which generates a first control signal Si and the control device 16 provides. In the control unit 19, the first control signal Si is evaluated and, when a first threshold value is exceeded, the actuator 13 is actuated by the control unit 19 in such a way that the grinding tool 14 is displaced in the adjustment direction V from the idle position VL to the grinding position ys. The first threshold value is exceeded after a period of time Atsi and thus the acceleration is reliably detected. The displacement of the grinding tool 14 from the idle position VL to the grinding position ys takes place in the time period At. From the stroke Ay and the duration At, the stroke velocity v _y = Ay / At.

The grinding of the rail 2 and the grinding of the material M takes place substantially at the speed v _x . For grinding, the grinding tool 14 is rotationally driven by means of the drive motor 12. Before reaching the second position x ₂ , the operator delays the rail grinding machine 1. This delay is detected by the signal generator 20, which generates a second control signal S ₂ which is provided to the control device 16. In the control unit 19, the second control signal S _{2 is} evaluated and when a second threshold value is exceeded by the control unit 19 of the actuator 13 is actuated so that the grinding tool 14 is displaced in the direction V from the grinding position ys to the idle position yL. The second threshold is exceeded starting with the delay after a period Ats ₂ . The rail grinding machine 1 is shown in dashed lines in the position x ₂ in Fig. 2.

The grinding tool 14 is thus automatically shifted in dependence on the first control signal Si in the grinding position ys and depending on speed of the second control signal S ₂ automatically shifted to the idle position yL. The generation of the control signals Si and S ₂ takes place automatically as a function of the displacement of the rail grinding machine 1. The control device 16 actuates the actuator 13 as a function of the at least one parameter P, which is in particular the grinding position ys, the idling position yL, the stroke Ay, the stroke duration At and / or the lifting speed v _y . In addition, the threshold values are stored and adjustable in the control device 17. The grinding, starting from the position x ₂ in the longitudinal direction L 'takes place in a corresponding manner with the control signals Si' and S ₂ ', which are shown in dashed lines in Fig. 2.

Hereinafter, a second embodiment of the invention will be described with reference to FIG. 3. In contrast to the first embodiment, the rail grinding machine 1 on a signal generator 20, which is designed as a button. The signal generator 20 is arranged on the handle 5. With the manual shifting of the rail grinding machine 1, a user manually presses the buzzer 20, which generates the first control signal Si. After an adjustable period of time Atsi, the control device 16 actuates the actuator 13, which moves the grinding tool 14 in the adjustment direction V from the idling position yL to the grinding position ys. The operator holds the buzzer 20 depressed during shifting and grinding. At the end of the grinding path Ax, the operator delays the rail grinding machine 1 and releases the pressed signal generator 20. The signal generator 20 then automatically returns to its original position and generates the second control signal S ₂ . After the adjustable period Ats ₂ , the control device 16 actuates the actuator 13, the the grinding tool 14 is displaced in the adjusting direction V from the grinding position ys to the idling position yL.

The shifting and grinding takes place in the longitudinal direction L 'in a corresponding manner. An operator moves the rail grinding machine 1 with the handle 5 in the longitudinal direction L 'and generates with the signal generator 20, the control signals Si' and S ₂ '. With regard to the further structure and the further operation of the rail grinding machine 1, reference is made to the first embodiment.

Claims

claims

1. Rail grinding machine for grinding rails of a track with

a machine frame (3),

- on the machine frame (3) rotatably mounted guide rollers (4) for manually moving the rail grinding machine (1) on the rails (2),

- One on the machine frame (3) mounted grinding unit (1 1) with

- A rotary drivable grinding tool (14) and

- An actuator (13) for adjusting the position of the grinding tool (14), and

a signal generator (20) for generating at least one control signal

marked by

a control device (16) for automatic position adjustment of the grinding tool (14) as a function of the at least one control signal (Si, S ₂ ) by actuating the actuator (13).

2. Rail grinding machine according to claim 1, characterized

in that at least one parameter (P) for automatic position adjustment is stored in the control device (16), wherein the at least one parameter (P) is in particular a grinding position (ys), a

Idle position (VL), a stroke (Ay), a stroke duration (At) and / or a stroke speed (v _y ). Rail grinding machine according to claim 1 or 2, characterized

that the signal generator (20) is a manually operable switch, in particular a button.

Rail grinding machine according to one of claims 1 to 3, characterized

that the signal generator (20) is an acceleration sensor.

Method for grinding rails of a track comprising the steps:

- Providing a rail grinding machine (1) with

A machine frame (3),

- One on the machine frame (3) mounted grinding unit (1 1) with

- A rotary drivable grinding tool (14) and

- An actuator (13) for adjusting the position of

Grinding tool (14),

- A signal generator (20) for generating at least one control signal (Si, S ₂ ), and

A control device (16) for automatic position adjustment of the grinding tool (14) as a function of the at least one control signal (Si, S ₂ ) by actuating the actuator (13),

Moving the rail grinding machine (1) on the rails (2) in a longitudinal direction (L, L ') and generating at least one control Ersignals (Si, S ₂ ) by means of the signal generator (20) in response to the shifting, and

- automatic position adjustment of the grinding tool (14) in a direction perpendicular to the longitudinal direction (L, L ') extending direction (V, V) such that the actuator (13) from the control device (16) in dependence of at least one control signal ( Si, S ₂ ) is actuated.

Method according to claim 5, characterized in that

in that the control device (16) actuates the actuator (13) as a function of at least one parameter (P) stored in the control device 16), the at least one parameter (P) in particular a grinding position (ys), an idling position (y ^ , a stroke (Ay), a stroke duration (At) and / or a stroke speed (v _y ).

7. The method according to claim 5 or 6, characterized

that the signal generator (20) generates a first control signal (Si), whereupon the grinding tool (14) is automatically displaced to a grinding position (ys) for grinding, and

in that the signal generator (20) generates a second control signal (S ₂ ), whereupon the grinding tool (14) is automatically shifted to an idling position (y ^) for ending the grinding.

8. The method according to claim 7, characterized

that the signal generator (20) is a manually operable switch, in particular a button,

the signal generator (20) generates the first control signal (Si) during a first actuation and the second control signal (S ₂ ) during a subsequent second actuation. Method according to claim 7 or 8, characterized in that the signal generator (20) is an acceleration sensor,

that the signal generator (20) at an acceleration of the rail grinding machine (1), the first control signal (Si) and at a delay tion of the rail grinding machine (1), the second control signal (S ₂ ) testifies.