WO2022173391A1

WO2022173391A1 - Rigid and light bridge construction and manufacturing technique used in laser cutting machines

Info

Publication number: WO2022173391A1
Application number: PCT/TR2021/051017
Authority: WO
Inventors: Abdurrahman Vasif İnan; Abdullah ÖZKAN
Original assignee: Mvd Maki̇ne Sanayi̇ Anoni̇m Şi̇rketi̇
Priority date: 2021-02-11
Filing date: 2021-10-05
Publication date: 2022-08-18
Also published as: TR202101972A2

Abstract

This invention is related to constructing and manufacturing technique for rigid and light bridge which is developed for keeping deformation amount due to mass inertial and for maintaining required strength in bridge system since bridge is subjected to high acceleration which moves at three axis in laser cutting machine which allows cutting steel, copper, aluminum or brass materials by contact-free laser beam.

Description

RIGID AND LIGHT BRIDGE CONSTRUCTION AND MANUFACTURING

TECHNIQUE USED IN LASER CUTTING MACHINES

TECHNICAL FIELD

STATE OF THE ART

Human beings are in a continuous process of development in order to meet their various needs since the day they were on earth. In this development process, many materials are processed and used for different purposes. It is one of the materials processed in materials such as steel, copper, aluminum or brass and used for different purposes. Although the relevant materials have different properties, they must be cut in various ways according to the places where they will be used as a result of their processing. Laser cutting machines that allow the cutting of materials with laser beam without contact have been produced together with the development of technology in order to prevent errors in cutting the material to be produced since it is very difficult and time-consuming to perform these cutting processes with the help of hand force.

Fiber laser cutting machines contain a bridge that works with the logic of a Cartesian robot moving in three axes on the machine body, which includes ventilation and automation systems. The bridge should be driven at as high speeds as possible in order for the production efficiency to be as high as possible. Bridge must be driven by motors at high acceleration values in order for the bridge to reach high speeds as soon as possible. The heavier the bridge, the higher power motors are required. Therefore, the bridge should be as light as possible. At the same time, it must be rigid so that it does not deform more than the cutting precision when acceleration and stopping acceleration are applied. In the current present, there is no structure where these two requirements are met together.

DESCRIPTION OF INVENTION

Subject invention eliminates the disadvantages described in the state of the art and meets the needs.

Subject invention is related to constructing and manufacturing technique for rigid and light bridge which is developed for keeping deformation amount due to mass inertial and for maintaining required strength in bridge system since bridge is subjected to high acceleration which moves at three axis in laser cutting machine which allows cutting steel, copper, aluminum or brass materials by contact-free laser beam.

In laser cutting machines, there is a bridge system that works with Cartesian logic to transfer the fiber laser beam onto the steel, aluminum, copper or brass plate that is desired to be cut, in the desired cutting path. The moving bridge mechanism can be supported on the machine body from two sides or from one side. In the machine where the invention is used, it is supported by carriers on both sides. There are movement systems on the bridge system that enables the laser cutting head to move in three axes. There are guide rails that provide linear movement on the bridge body and a rack gear that provides power transmission. The machine must work at high speeds as possible In order for the production efficiency to be high and at high accelerations in order to lose the least amount of time during stop / start. The bridge system is required to have the lowest mass as possible In order to achieve the required acceleration and to make the least deformation against the forces caused by acceleration. The lowest mass can be obtained by designing the body from aluminum material,, but the inertia of the aluminum material is three times lower than the structure designed from steel material due to its low modulus of elasticity. The A and B angles, material thicknesses and dimensions shown in Figure 4, the design of the tie pieces were calculated by parametric optimizations In order to obtain the same inertia value. The construction of the tabbed and interlocking structure was designed for bending from the plate as a manufacturing method and for easy and standard manufacturing After the design parameters of the aluminum bridge were obtained. The aluminum body structure shown in Figure 3 consists of five parts. It is manufactured by placing tabbed tie pieces in the slots on the body bent plate and by welding lower aluminum plate after sealing. The final version of the bridge, which is designed to work best with motion transfer components and other components of the machine, is shown in Figure 1.

The manufacturing technique and design of the high rigidity and low lightweight aluminum bridge of the subject invention are important innovative aspects.

REFERENCE LIST

2. Guide rail system

6. rack gear system

9. cable carrier unit

12. bent aluminum plate body

13. tabbed tie piece

14. body lower plate

15. tie piece tabs

16. laser machine body

19. bridge supports

36. guide rails

81. Z axis cable duct

89. Laser bridge Z axis module housing

90. Y axis and Z axis movement body

105. Y axis cable duct

112. bellows

436. cable duct 584. bridge system

K. bridge body

A. A bend angle value

B. B bend angle value

BRIEF DESCRIPTION OF DRAWINGS

Figure 1 : Representative general view of the subject invention machine

Figure 2: Representative front general view of subject invention machine

Figure 3: Representative general view of the bent aluminum plate body (12), tabbed tie piece (13), body bottom plate (14), tie-piece tabs (15) assembled and de-assembled forming the bridge body (K) of the subject invention.

Figure 4: Representative front general view of the subject invention bent aluminum plate body (12), tabbed tie piece (13), tie piece tabs(15)

Figure 5. Representative view of the laser cutting machine in which the invention is applied.

DESCRIPTION OF INVENTION

This invention is constructing rigid and light bridge which is used in laser cutting machine and it is characterized as it includes,

• Rigid bent aluminum plate body (12) produced from aluminum material, which is the main carrier of the bridge system,

• Tabbed tie pieces (13), which provides ease of assembly and standardization with tabs that provide rigidity to the carrier bent aluminum plate body (12)

• Body bottom plate (14) that provides ease and standard of assembly of the bent aluminum plate body (12) of rigid design with aluminum material,

• The tie pieces (15), which are a structure with tabs on the aluminum tabs (13), providing ease of assembly and standard of measurement

Cable carrier unit (9) may be present in subject invention for transferring power cables, fiber laser cable and hoses There can be aluminum bridge carriers (19) that allow the support of the aluminum bridge system and also include the motor system on it in subject invention. The general view of the laser cutting machine is given in figure 5. Laser cutting machines are used for precise cutting of aluminum, steel, copper, and similar sheets. It includes a movable bridge system (584) in order to transfer the laser beam to the laser head on the bridge system (584) and to provide the motion encoded to the machine. Movement of the X-axis of the bridge system (584) is ensured by transferring energy by cables which are transferred through cable duct (436) and servo motors through guide rails(36) on the laser machine body (16). The movement in the Y axis is provided by linear movement of the Y axis and Z axis movable body (90) on the bridge system (584) through guide rail (2) system by transmission of drive which is obtained from motors which are present in Y axis and Z Axis movable body(90) through rack gear. The Y axis cable carrier unit (9) performs the transfer of energy to the motors, the transportation of the laser beam by fiber cable and the transfer of the hoses that meet various requirements. All of these systems are positioned on the bridge body (K) shown in Figure 3. The bridge body (K) is supported to the guide rails (36) located in the laser machine body (16)by aluminum bridge carriers (19). The transfer of cables, fiber cables and hoses to the movable body (90) on the Y and Z axes on the bridge system (584) is made via the Y axis cable duct(105) and the Z axis cable duct (81). They are closed with bellows (112) in order to protect the systems housed on the bridge system (584) from ambient conditions. The bridge body (K) contains one or more aluminum tabbed tie pieces (13) which are easily positioned inside the aluminum plate (12) bent at optimized angles, thanks to the tie pieces(15), and the aluminum body bottom plate (14) welded at the bottom. Bridge system (584) must be rigid during high accelerations in X-axis motion. A bent angle value (A) shown in Figure 4 is between 110°-120, angle, and the bending angle value (B) is between 150° - 160°. A bent angle value (A) which is shown in figure 4 that can provide best inertia values is at range of 110°-120,and it is between 150° - 160° bending angle value (B) In the design of the bent aluminum sheet body (12)Thanks to the triangular structure, inertia is achieved that can react rigidly to the forces arising due to acceleration in the X axis. Thanks to the lightness of the aluminum material, the machine has been enabled to operate at higher acceleration values with the same motor energy.

The bridge system (584) on the laser machine body (16) moves on the guide rails (36) in the X direction. The cable duct(436) provides the transfer of the cables in the bridge system (584) by folding in the X axis. The systems on the bridge system (584) can also move in the Y axis and the Z axis.

Laser bridge z axis module body (89); is the housing of X and Y axis body (90) In the system moving up and down at the Z axis

Claims

1. A rigid and light bridge structure which is used in laser cutting machines and characterized by comprising;

2. The rigid and light bridge structure according to Claim 1 and characterized by comprising; cable carrier unit (9) for transferring power cables, fiber laser cable and hoses.

3. The rigid and light bridge structure according to Claim 1 and characterized by comprising; consists of aluminum bridge carriers (19) that enable the support of the aluminum bridge system (584) and also contain the motor system on it.

4. The rigid and light bridge structure and characterized in that; the bridge body (K) is supported to the guide rails (36) in the laser machine body (16) with aluminum bridge carriers (19).

5. The rigid and light bridge structure according to Claim 4 and characterized in that; the bridge body (K) is positioned inside the aluminum plate (12) bent at optimized angles by means of the tie pieces (15) and the aluminum is welded to one or more aluminum tabbed pieces (13) and the aluminum body bottom plate (14) at the bottom.

6. The rigid and light bridge structure according to Claim 1 and characterized in that; A bending angle value (A) of the bending aluminum plate body (12) is 110°-120°, the B bending angle value (B) is the twisted angle value between 150° - 160°.