CN202763285U - Nitrogen laser cutting machining device for saw blade substrate - Google Patents

Abstract

A nitrogen laser cutting machining device for a saw blade substrate comprises a laser cutting machine. A laser beam passes through a first copper reflecting mirror, a copper polarization mirror, a second copper reflecting mirror and a focusing mirror, and then acts on a workpiece to be cut. A nitrogen nozzle is arranged on one side of the workpiece to be cut and connected with a nitrogen supply device. The nitrogen laser cutting machining device for the saw blade substrate has the advantages that materials are molten completely by laser energy during nitrogen cutting, and nitrogen blows out molten slag in cutting seams to avoid improper chemical reaction; the temperature in a melting point area is relatively low, plus cooling and protecting functions of the nitrogen, thermal deformation is little, reaction is smooth and uniform, and cutting quality is high; a fracture surface is fine and smooth, the surface roughness is low, and an oxidation layer does not exist; the saw blade substrate cut by nitrogen laser is high in precision, a mounting hole has no deformation, the tooth part is not scalded, the allowance of a front grinding tooth of a welding tool bit is small or a grinding tooth is not needed, and basic quality is improved obviously; and abrasion of a tool does not exist in the machining process, and the consistency of products in the process of batch machining is strong.

Description

Saw bit matrix nitrogen laser cutting apparatus

Technical field

The utility model relates to laser processing device, particularly a kind of saw bit matrix nitrogen laser cutting apparatus.

Background technology

Saw blade has a wide range of applications in the cutting field.Along with the variation of the expansion of saw blade range of application and processing object, complicated, the performance of saw bit matrix is had higher requirement.For guaranteeing that saw blade has good cutting ability, saw bit matrix must possess higher quality stability and cutting repeatable accuracy, and the processing mode of saw bit matrix aperture and tooth section just has obvious impact to its precision.

In the prior art, for saw bit matrix aperture and the moulding of tooth section, common employing is rushed the modes such as tooth, line cutting, oxygen laser cutting and is processed.Rush that tooth exists that the tooth calibration is uneven, the increment face steps on that the limit is serious, to rush abrasive wear fast, changes the problems such as frequent, is unfavorable for that subsequent handling processes, and has in the use certain defective; Line cutting processing efficient is low, long in time limit, cost is high, quality is unstable, and energy-saving and cost-reducing control difficulty is larger, is unfavorable for extensive order production.Traditional carbon dioxide laser beam take oxygen in the process of assist gas cast-cutting saw slice matrix, may occur owing to the overheated situation that makes the shape distorted that occurs in the process, and the spatial distribution of light intensity is gaussian model, when the processing acute angle, easily produce defectives such as burning the angle.As assist gas precessing saw sheet matrix, main quality problems show as with oxygen: the installing hole distortion, and precision is low; Crown, toothholder are easily burnt, and cause welding the front grinding theeth allowance of cutter head and become large, as shown in Figure 2.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of saw bit matrix nitrogen laser cutting apparatus, can high-quality cast-cutting saw slice matrix, and workpiece is without distortion in the process, and workpiece material is without inappropriate chemical reaction, without tool wear.

For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of saw bit matrix nitrogen laser cutting apparatus, comprise laser cutting machine, laser beam acts on workpiece to be cut after through the first bronze medal speculum, copper polariscope, the second bronze medal speculum and focus lamp;

Side at workpiece to be cut is provided with the nitrogen nozzle, and the nitrogen nozzle is connected with the nitrogen supply (NS) device.

Air pressure in the described nitrogen supply (NS) device is 12～18 bar.

Nitrogen gas purity in the described nitrogen supply (NS) device 〉=99.8%.

Described nitrogen nozzle distance workpiece 0.5～1.5mm to be cut.

The X-axis that described the first bronze medal speculum and copper polariscope are positioned at the laser cutting machine lathe is to the Y-axis turning point, and the second bronze medal speculum is positioned at the Y-axis of laser cutting machine lathe to the Z axis turning point.

Laser output power 〉=the 2000W of described laser cutting machine,

Described laser beam pattern is TEM00 or TEM01.

Described laser beam adopts pulse mode processing, and pulse parameter is: frequency 600～1000HZ; Dutycycle: 60%～75%.

A kind of saw bit matrix nitrogen laser cutting apparatus that the utility model provides by adopting above-mentioned structure, has following beneficial effect:

1, material relies on the laser energy fusing fully in the nitrogen cutting, and nitrogen blows out the slag in the joint-cutting and avoids inappropriate chemical reaction.

2, the fusing point regional temperature is relatively low, adds cooling, the protective effect of nitrogen, and thermal deformation is little, reacting balance, even, and cut quality is high.

3, section is moist, and surface roughness is low, and the non-oxidation layer.

4, the saw bit matrix precision of nitrogen laser cutting is high, and installing hole is undeformed, and tooth section is without burn, and the front grinding theeth allowance of welding cutter head is little or need not roll flute, and substrate quality is obviously promoted.

5, in the process without tool wear, homogeneity of product is strong in the batch machining process.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples:

Fig. 1 is integrally-built schematic diagram of the present utility model.

Fig. 2 is the main TV structure schematic diagram of workpiece to be cut in the utility model.

Among the figure, endoporus 1, installing hole 2, toothholder 3, crown 4, the first bronze medal speculums 5, copper polariscope 6, focus lamp 7, workbench 8, workpiece 9 to be cut, laser beam 10, nitrogen nozzle 11, nitrogen supply (NS) device 12, the second bronze medal speculums 13.

The specific embodiment

In Fig. 1, a kind of saw bit matrix nitrogen laser cutting apparatus comprises laser cutting machine, and laser beam 10 acts on workpiece 9 to be cut after through the first bronze medal speculum 5, copper polariscope 6, the second bronze medal speculum 13 and focus lamp 7; Side at workpiece 9 to be cut is provided with nitrogen nozzle 11, and nitrogen nozzle 11 is connected with nitrogen supply (NS) device 12.

Air pressure in the described nitrogen supply (NS) device 12 is 12～18 bar, and namely inlet pressure is 12～18bar.Nitrogen gas purity in the described nitrogen supply (NS) device 12 〉=99.8%.The nozzle model is individual layer, and the gas outlet diameter of nitrogen nozzle 11 is 1.5～2.5mm.Nitrogen nozzle 11 distances workpiece to be cut is 0.5～1.5mm.

Laser output power 〉=the 2000W of described laser cutting machine, described laser beam 10 patterns are TEM00 or TEM01.Described laser beam 10 adopts the pulse cooked mode, and pulse parameter is: frequency 600-1000HZ; Dutycycle: 60%-75%.

Material to be cut adopts the carbon steel of processing through modified quenching+tempering, and thickness is 2.2～3.0mm;

With Laser Processing complete set of equipments system rule the saw matrix processing, this system comprises laser instrument, light-conducting system, workbench and control section.Laser spot is adjusted in the lower surface of workpiece 9 materials to be cut.

Concrete cutting parameter such as following table:

Material thickness mm power (W) speed (m/min) air pressure (bar) nozzle diameter (mm)

2.2 2000 3.0 12～18 1.5～2.5

2.5 2200 2.4 12～18 1.5～2.5

3.0 2400 1.8 12～18 2～2.5

Concrete procedure of processing is:

1, at first use CAD Software on Drawing saw bit matrix nitrogen laser cutting figure, and application specific software is converted into numerical control program with laser cutting figure and copies into laser cutting machine tool.

2, after laser emits from laser instrument, behind light-conducting system first bronze medal speculum-polariscope-second bronze medal speculum-focus lamp of laser cutting machine tool top, pool a high-octane hot spot.

Digital control system drive and control under, lathe according to numerical control code instruction make the X-Y two dimensional motion, light beam is consistent with the movement locus of Z axis in X-Y plane.As shown in Figure 1, as can be seen from the figure laser conduction process.

4. cutting head is moved to material to be cut top, the distance of regulating nozzle and material is 0.5～1.5mm, regulates focal length value according to material thickness, and regulates the cutting parameters such as power, speed, air pressure.

5. carry out saw bit matrix nitrogen laser cutting program, light beam will be according to the numerical control program instruction, from the cutter point, above material, move, dissolve material in the motion track by high-energy moment, and blow away slag in the joint-cutting by high pressure nitrogen.

The X-axis that described the first bronze medal speculum 5 and copper polariscope 6 are positioned at the laser cutting machine lathe is to the Y-axis turning point, and the second bronze medal speculum 13 is positioned at the Y-axis of laser cutting machine lathe to the Z axis turning point.Have among Fig. 1 and can find out, after laser beam 10 sends in the laser instrument, successively through pooling a small light spot behind the first bronze medal speculum 5, copper polariscope 6, the second bronze medal speculum 13 and the focus lamp 7, above-mentioned structure has guaranteed that Z axis is in X-Y plane in the relative motion process, when light path changes, the directionality relative uniformity of laser beam 10.After laser beam 10 arrives carbon steel 9 to be cut, cut successively as shown in Figure 2 endoporus 1, installing hole 2 and tooth section according to programmed instruction, process saw bit matrix.

Claims (8)

1. saw bit matrix nitrogen laser cutting apparatus, comprise laser cutting machine, it is characterized in that: laser beam (10) acts on workpiece to be cut (9) after through the first bronze medal speculum (5), copper polariscope (6), the second bronze medal speculum (13) and focus lamp (7);

Side at workpiece to be cut (9) is provided with nitrogen nozzle (11), and nitrogen nozzle (11) is connected with nitrogen supply (NS) device (12).

2. a kind of saw bit matrix nitrogen laser cutting apparatus according to claim 1 is characterized in that: the air pressure in the described nitrogen supply (NS) device (12) is 12～18 bar.

3. a kind of saw bit matrix nitrogen laser cutting apparatus according to claim 1 is characterized in that: the nitrogen gas purity in the described nitrogen supply (NS) device (12) 〉=99.8%.

4. a kind of saw bit matrix nitrogen laser cutting apparatus according to claim 1 is characterized in that: described nitrogen nozzle (11) distance workpiece (9) 0.5～1.5mm to be cut.

5. a kind of saw bit matrix nitrogen laser cutting apparatus according to claim 1, it is characterized in that: the X-axis that described the first bronze medal speculum (5) and copper polariscope (6) are positioned at the laser cutting machine lathe is to the Y-axis turning point, and the second bronze medal speculum (13) is positioned at the Y-axis of laser cutting machine lathe to the Z axis turning point.

6. a kind of saw bit matrix nitrogen laser cutting apparatus according to claim 1 is characterized in that: the laser output power 〉=2000W of described laser cutting machine.

7. a kind of saw bit matrix nitrogen laser cutting apparatus according to claim 6, it is characterized in that: described laser beam (10) pattern is TEM00 or TEM01.

8. a kind of saw bit matrix nitrogen laser cutting apparatus according to claim 7 is characterized in that: described laser beam (10) adopts pulse mode processing, and pulse parameter is: frequency 600～1000HZ; Dutycycle: 60%～75%.

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