CN1640608A - Thin-plate laser cutting-welding machine - Google Patents

Abstract

The invention relates to a thin-plate laser cutting and welding machine, which includes a laser cutting and welding machine, a base, and a workbench installed on the base. The workbench is used for fixing thin-plate workpieces. The positioning pin, the cutting edge of the workpiece leans against the positioning pin to position the workpiece; when cutting and welding is required, the positioning pin retracts downward into the workbench, and the positioning pin and the workpiece produce relative displacement to make the positioning pin Cut weld edges away from the workpiece.

Description

Thin plate laser cutting welding machine

technical field

The invention relates to a thin plate laser cutting and welding machine, in particular to a thin plate laser cutting and welding machine with a precision positioning device.

Background technique

The positioning of the workpiece on the workbench of the existing thin plate laser cutting welding machine is to rely on the operator to observe whether the workpiece is aligned with the eyes, adjust the workpiece manually, and then manually compress the workpiece with a pressure plate and bolts. This positioning method is inaccurate and relatively rough. It mainly depends on the experience of the operator. The positioning is different each time, so the waste materials cut each time are also different. The shape of the workpiece is also different. Due to the inconsistent positioning of each cutting, the starting point and the ending point of each cutting are inconsistent. It is very troublesome to adjust the cutting path of the laser cutter for each cutting, and the auxiliary adjustment work takes a long time. Low efficiency, not suitable for mass production. In addition, due to the unsatisfactory clamping method, the workpiece is partially warped, which affects the quality of the weld, resulting in unstable welding quality.

Chinese patent application No. 91230556 discloses a special fixture designed for CNC full-automatic laser welding of platinum alloy bushings. It is mainly composed of an upper platen and a clamp body, and there are ribs, grooves and positioning pins on it. Holes, etc., to achieve fast and accurate positioning, to ensure good flatness and good welding quality. The locating pins of the fixture and the locating pins of the breakout plate are all manually positioned and fastened by bolts, which is not efficient and is not suitable for thin plate cutting and welding.

US Patent No. 5098005 and No. 5045668 also disclose two kinds of workpiece fixing and clamping devices used in laser welding machines, but these devices have complex structures. The locating pin disclosed in the No. 5045668 patent is located on the outside of the workpiece, so it is only suitable for the alignment of very standard and straight workpieces. If the outer edge of the workpiece is irregular, it cannot be used for alignment. The workpiece fixing and clamping device in the laser welding machine disclosed in US Patent No. 5023427 adopts an electromagnetic suction device, which will interfere with other electronic devices during use.

Contents of the invention

The object of the present invention is to provide a thin plate laser cutting and welding machine that can ensure accurate positioning of workpieces, is convenient and reliable in operation, and is beneficial to mass automatic production.

The purpose of the present invention is achieved through the following technical methods: the thin plate laser cutting welding machine includes a laser cutting welding machine, a base, a workbench installed on the base, the workbench is used to fix the thin plate workpiece, and the workbench is provided with at least Two parallel positioning pins that can be retracted up and down. The cutting edge of the workpiece is against the positioning pins to position the workpiece; Creates a relative displacement to keep the locating pin away from the cut weld edge of the workpiece.

The thin plate laser cutting and welding machine disclosed by the present invention has the advantages of accurate, reliable and fast positioning of workpieces to be cut and welded, greatly improving production efficiency, improving cutting and welding quality, and facilitating automation and semi-automation of production. In addition, multiple positioning pins arranged in parallel can be installed to be suitable for the positioning of workpieces of different specifications.

Description of drawings

Fig. 1 is the schematic diagram of the front view of the thin plate laser cutting and welding machine of the present invention;

Fig. 2 is a top view schematic diagram of the thin plate laser cutting welding machine of the present invention;

Fig. 3 is the left schematic diagram of thin plate laser cutting welding machine of the present invention;

Fig. 4 is a partial cross-sectional view showing positioning pins of the thin plate laser cutting and welding machine of the present invention.

Detailed ways

The present invention will be further described below in conjunction with embodiment.

Please refer to Fig. 1 to Fig. 4, thin plate laser cutting and welding machine of the present invention comprises laser cutting and welding machine, base 4, upper workbench 2 and lower workbench 5 installed on the base, these two workbenches 2,5 are used for respectively Fix thin plate workpieces 3,6. A precision ball screw (not shown) is installed on the base 4, the precision linear guide rails 8 and 9 are connected to the above screw, the lower workbench 5 is installed on the precision linear long guide rail 9, and the precision linear short guide rail 8 is installed on the lower workbench 5, the upper workbench 2 is installed on the precision linear short guide rail 8. The CNC system controls the servo motor to drive the precision ball screw to rotate, so that the worktables 2 and 5 can slide along the guide rails 8 and 9 .

The lower workbench 5 includes two parts, wherein the first part can extend into the bottom of the upper workbench 2, and the other part is flush with the upper workbench 2, and a row of positioning pins 1 arranged in parallel horizontally is arranged on the first part of the lower workbench 5 superior. The positioning pin 1 includes a cylinder 12, a linear bearing 13 fixed above the cylinder, a cylinder 14 installed in the linear bearing 13 and a bearing 15 installed above the cylinder 14, and the bearing 15 can rotate around the cylinder 14. Through the piston movement of the cylinder 12, the cylinder 14 can drive the bearing 15 to move in the vertical direction. The cutting edge of the workpiece 3 is against the bearing 15 of the positioning pin 1 to position the workpiece 3; A relative displacement in the horizontal direction is generated with the workpiece 3 so that the positioning pin 1 is away from the cutting and welding edge of the workpiece 3 .

A plurality of electromagnets 7 are arranged on the workbenches 2 and 5, and the electromagnets 7 will generate attraction to the workpieces to fix the workpieces 3 and 6 after being energized. There are also a plurality of vacuum chucks 11 on the worktables 2 and 5. Firstly, the electromagnet 7 is energized to initially clamp the workpiece. When cutting and welding, the electromagnet 7 is removed after clamping the workpiece with the vacuum chuck 11 to ensure that the electromagnet is 7 does not affect other electronic devices. The vacuum chuck 11 can be fine-tuned in the vertical direction to compensate for installation errors caused by several suction cups. Positioning pins 10 are provided on both lateral sides of the workbenches 2, 5 to fix the workpieces 3, 6 in the lateral direction.

The working process of the thin plate laser cutting welding machine of the present invention is:

1. The lower workbench 5 moves outward to a loading position. Figure 2 shows the state where the lower workbench 5 moves outward to the limit position;

2. The workpiece 3 to be welded (or to be cut) is placed on the upper table 2, positioned by two positioning pins 1, and then initially clamped by the two workpieces 3 to be welded in the electromagnet 7;

3. The vacuum chuck 11 works, sucks and clamps the workpiece 3 to be welded firmly, and then the electromagnet 7 loses power, and the electromagnetic clamping force disappears;

4. The positioning pin 1 moves downward, and the upper worktable 2 is driven by the servo motor to move to the predetermined position to the right, covering the positioning pin 1;

5. Align and close the workpiece 6 to be welded with the welding edge of the workpiece 3 to be welded through the positioning pin 10 to complete the positioning of the two workpieces to be welded, and then clamp them by the two effective electric magnets 7;

6. The vacuum chuck group 11 works, sucks and clamps the workpiece 6 to be welded firmly, and then the electromagnet 7 loses power and releases it;

7. The lower workbench 5 moves inward to the specified welding position to be welded;

8. The laser welding machine completes the butt welding of workpieces 3 and 6 to be welded;

9. The lower working table 5 moves to the outside to the specified unloading position;

10. The vacuum suction cup group 11 stops working, and the clamping force disappears;

11. Remove the welded workpiece from the workbench.

The above process can be controlled by the numerical control system through programming.

The advantages of the thin plate laser cutting and welding machine of the present invention are: the positioning of the workpiece to be cut and welded is accurate, reliable and fast, the production efficiency is greatly improved, the quality of cutting and welding is improved, and it is beneficial to the automation and semi-automation of production. And because a plurality of positioning pins arranged in parallel are installed, it can be applied to workpieces of different specifications.

Claims (7)

1. a sheet laser cuts bonding machine, comprise the laser cutting bonding machine, base, be installed in the workbench on the base, this workbench is used for fixing the thin plate workpiece, it is characterized in that: be provided with at least two parallel alignment pins that can stretch up and down on workbench, the cutting edge of workpiece is resisted against on the described alignment pin so that this workpiece location; When needs when welding cutting, alignment pin is retracted into downwards in the workbench, alignment pin with workpiece generation relative displacement so that alignment pin away from the cutting welding edge of workpiece.

2. sheet laser as claimed in claim 1 cutting bonding machine is characterized in that: workbench is along being arranged at the component movement that precision ball screw on the base and accurate line slideway are formed.

3. sheet laser cutting bonding machine as claimed in claim 1, it is characterized in that: workbench is provided with a plurality of electromagnet, can produce after the electromagnet energising workpiece is produced attraction with fixation workpiece.

4. sheet laser cutting bonding machine as claimed in claim 3, it is characterized in that: also be provided with a plurality of vacuum cups on the workbench, make the electromagnet energising that workpiece is carried out just clamping earlier, when the cutting welding, with cancelling electromagnet behind the vacuum cup clamping work pieces, do not influence other electronic installation to guarantee electromagnet.

5. sheet laser cutting bonding machine as claimed in claim 4, it is characterized in that: vacuum cup can be finely tuned on vertical, to compensate the alignment error that is caused by several suckers.

6. sheet laser cutting bonding machine as claimed in claim 2, it is characterized in that: described workbench comprises first workbench and second workbench, be respectively applied for and fix two workpiece to be welded, two all base slips relatively of workbench, the first of second workbench can extend into first workbench below, another part is concordant with first work stage, and described alignment pin is arranged in the first of second workbench.

7. as one of any described sheet laser cutting bonding machine of claim 1 to 6, it is characterized in that: described alignment pin comprises cylinder, be fixed in the linear bearing of cylinder top, be installed on the cylinder in the linear bearing and be installed on the bearing of cylinder top, and bearing can roll around cylinder, by the piston motion of cylinder, the bearing that can make cylinder drive its top moves in vertical direction.

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