The present invention relates to a bending angle measurement system for use in cylinder and profile bending machines and which determines the angle, formed during bending of metal sheet plates or profile types, by means distance measurement device and which checks said angle and which provides said angle to reach the desired angle.

KNOWN STATE OF THE ART

In the present case, bending function in cylinder bending and profile bending machines is provided by means of the teaching method. First of all, the machine axes realize bending which is close to the target bending point, and afterwards, the formed bending angle is measured manually by means of angle measurement devices. The next action of the machine is determined in accordance with the measured angle, and the bending target is entered into the machine again. This process continues until the bending target (the desired bending angle) is provided. Since the materials used in bending can have very different characteristics, separate bending shall be realized for every material, and it shall be recorded to the database. This process is difficult, and at the same time, it leads to substantial time loss. Another bending method is to use specific formulas based on the geometry of the bending machine. However, the result of the bending process provided by means of said method may not be absolutely correct. Since said adjustments and formulas are provided by persons, error risk occurs during the bending process. Moreover, the methods used in the present art are realized based on the cases occurring as a result of pre-operation or repetitive operation.

As a result, because of all of the abovementioned problems and because the present solutions are insufficient on the subject, an improvement is required in the related technical field. OBJECT THE INVENTION

The object of the present invention is to eliminate the above mentioned disadvantages and to bring new advantages to the related technical field.

The main object of the present invention is to automatically measure the angle, formed during bending of metal sheet plates or profile types, by means of sensors.

Another object of the present invention is to check whether the realized angle measurement has reached the desired bending angle.

Another object of the present invention is to continue the bending process if it is understood that the target has not been reached as a result of said check. Another object of the present invention is to continue said check and bending processes until the target bending angle is reached.

A final and important object of the present invention is to realize the bending process with the desired angle automatically by means of sensors.

In order to realize all of the abovementioned objects, the present invention is a bending angle measurement system. Said system comprises the following items:

• machine body,

· upper holder element and lower holder element positioned on the machine body and preventing rotation of the bending part around the own axis thereof and providing movement of the bending part forwardly-backwardly in the desired direction,

• upper drive center connected to the upper holder element and providing rotation of the upper holder element in the own axis thereof,

· lower drive center provided inside the lower holder element and providing rotation of the lower holder element in the own axis thereof,

• said bending part positioned between the upper holder element and the lower holder element and whereon the bending process is to be realized,

• at least one bending element positioned on the bending guide and which moves on the bending guide and which bends the bending part, at least one bending guide positioned on the machine body and whereon the bending element moves in order to bend the bending part

at least one sensor positioned on the machine body and which measures the distance between said bending part and itself by means of laser and which transfers measurement data to the control device,

control device having software and calculation algorithms and having the following properties:

o transforming said measurement data, transferred by the sensor, into angle value,

o checking whether the bending part has reached the bending angle targeted by the user,

o checking the forward-backward movement of the bending part between the upper holder element and the lower holder element by means of the movements of the upper drive center and the lower drive center, o adjusting the position of the bending element on the bending guide in order to provide reaching of the bending part to the desired bending angle o providing repeating of the bending process until reaching the desired bending angle. The structural and characteristic properties and all advantages of the present invention are going to be understood in a clearer manner thanks to the figures given below and thanks to the detailed description written by means of referring to these figures, and therefore, the evaluation shall be made by taking into consideration these figures and the detailed description.

BRIEF DESCRIPTION OF THE FIGURES

In Figure 1 , a frontal view of the preferred embodiment of the subject matter system is given. In Figure 2, a perspective view of the preferred embodiment of the subject matter system is given.

The drawings shall not be scaled and the details which are not necessary for understanding the present invention may be omitted. Besides, the elements, which are at least substantially identical or which has at least substantially identical functions, are shown with the same number. REFERENCE NUMBERS

10. Sensor

1 1 . Left sensor

12. Right sensor

20. Bending part

30. Sensor connection

31 . Left sensor connection

32. Right sensor connection

41 . Upper holder element

42. Lower holder element

50. Bending element

51 . Left bending element

52. Right bending element

60. Machine body

70. Control device

80. Bending guide

81 . Left bending guide

82. Right bending guide

91 . Upper drive center

92. Lower drive center

DETAILED DESCRIPTION OF THE INVENTION In this detailed description, the preferred embodiments of the present invention are explained with references to examples without forming any restrictive effect only in order to make the subject more understandable. First of all, the relative positions of the items of the preferred embodiment will be described and afterwards, the details and functions of said items will be described for providing understanding of the bending angle measurement system in a more comfortable manner. Finally, the operation of said system and the roles of said items inside the operation will be described.

The relative positions of the items in the preferred embodiment of said system are as follows: · The left sensor (1 1 ) which is a sensor (10) is positioned in a close manner to the left section on the machine body (60). • The right sensor (12) which is a sensor (10) is positioned in a close manner to the right section of the machine body (60).

• The bending part (20) is positioned so as to stay above the bending element (50) between the upper holder element (41 ) and the lower holder element (42).

• The sensor connection (30) is a mechanical part positioned between the sensor (10) and the machine body (60).

• The left sensor connection (31 ) which is a sensor connection (30) is positioned between the left sensor (1 1 ) and the machine body (60).

• The right sensor connection (32) which is a sensor connection (30) is positioned between the right sensor (12) and the machine body (60).

• The upper holder element (41 ) is connected to the machine body (60) so as to stay above the bending part (20).

• The lower holder element (42) is connected to the machine body (60) so as to stay under the bending part (20).

• The lower holder pusher (43) is positioned on the machine body (60) in a manner connected to the lower holder element (42).

• The left bending element (51 ) which is the bending element (50) is positioned at the left section of the machine body (60) and on the left bending guide (81 ).

• The right bending element (52) which is the bending element (50) is positioned at the right section of the machine body (60) and on the right bending guide (82).

• The control device (70) is connected to the machine body (60).

• The bending guide (80) is positioned on the machine body (60).

• The left bending guide (81 ), which is the bending guide (80), is positioned at the left section on the machine body (60).

• The right bending guide (82), which is the bending guide (80), is positioned at the right section on the machine body (60).

• The upper drive center (91 ) is positioned on the machine body (60) in a manner connected to the upper holder element (41 ).

• The lower drive center (92) is positioned on the machine body (60) in a manner connected to the lower holder element (42).

The details and functions of the items in the preferred embodiment of said system are as follows:

• The function of the left sensor (1 1 ) is to measure the distance between the bending part (20) and itself by means of laser rays as from the time when the bending part (20) begins bending when the bending process of the bending part (20) is to be realized by the left bending element (51 ).

• The function of the right sensor (12) is to measure the distance between the bending part (20) and itself by means of laser rays as from the time when the bending part (20) begins bending when the bending process of the bending part (20) is to be realized by the right bending element (52).

• The bending part (20) is the item placed between the upper holder element (41 ) and the lower holder element (42) in order to be bent at the desired angle by the user.

• The function of the sensor connection (30) is to fix the sensor (10) to the machine body (60).

• The function of the left sensor connection (31 ) is to fix the left sensor (1 1 ) to the machine body (60).

• The function of the right sensor connection (32) is to fix the right sensor (12) to the machine body (60).

· The function of the upper holder element (41 ) and the lower holder element (42) is to prevent the bending part (20), placed in between in order to be bent, from turning to the right-left around itself and is to provide moving forwardly-backwardly in the desired direction.

• The upper holder element (41 ) and the lower holder element (42) are preferably in cylindrical form.

• The function of the lower holder pusher (43) is to move the lower holder element (42) downwardly-upwardly with respect to the machine body (60) and is to tighten the bending part (20) in order to provide moving and bending thereof between the upper holder element (41 ) and the lower holder element (42).

· The function of the bending element (50) is to move on the machine body (60) and to bend the bending part (20). The bending element (50) is preferably in cylindrical form.

• The function of the left bending element (51 ) is to realize the bending process when the bending part (20) is placed to the machine from the right side and when the left side of the bending part (20) is to be bent.

· The function of the right bending element (52) is to realize the bending process when the bending part (20) is placed to the machine from the left side and when the right side of the bending part (20) is to be bent.

• The movements of the left bending element (51 ) and the right bending element (52) are determined in accordance with the bending angle value desired by the user by the control device (70), in the light of the data transferred from the sensors (10) to the control device (70). • The function of the control device (70) is to transform the data received from the sensors (10) and to check whether it reaches the desired value, in order to provide the desired bending angle.

• The control device (70) controls the upper holder element (41 ), the lower holder element (42) and the bending element (50) in order to provide bending at the desired angle.

• The left bending guide (81 ) is the mechanism whereon the left bending element (51 ) moves in order to bend the bending part (20).

• The right bending guide (82) is the mechanism whereon the right bending element (52) moves in order to bend the bending part (20).

• The upper drive center (91 ) provides the upper holder element (41 ) to turn in its own axis.

• The lower drive center (92) provides the lower holder element (42) to turn in its own axis.

· The power required for operation of said system is met by the network line preferably by means of cables or by means of a power supply like accumulator, battery, etc.

The operation of the preferred embodiment of said system and the roles of the items in this operation are as follows:

• If the left sensor (1 1 ) or the bending direction are in the exactly opposite direction, the laser ray, exiting the right sensor (12), reflects back from the surface (from the bending part (20)) provided in the opposite and the related sensor (10) generates coordinates in the plane x.

· The control device (70), having the required software and calculation algorithms, transforms the coming coordinate information into angle by means of algorithms.

• While bending is realized, the control device (70) continuously calculates the bending angle in the light of the data coming from the sensor (10) and sends the bending angle information to the CNC unit of the cylinder machine.

· If the calculated angle values are greater than the desired value, the upper holder element (41 ) moves circularly by means of the upper drive center (91 ) and the lower holder element (42) moves circularly by means of the lower drive center (92) in their own axes in opposite directions, and the bending part (20) to be bent is brought to the start position.

· By means of the algorithm operating in the control device (70), a new bending position is calculated. In accordance with the new value calculated, the bending element (50) positions itself on the bending guide (80) according to the commands coming from the control device (70).

The bending process is begun again, and this process is repeated until the bending angle of the bending part (20) is preferably +/-1 mm far from the desired angle value.