CN108914118B - Laser cladding near-net-shape forming control method for cosmetic cotton die cutting blade - Google Patents

Abstract

The invention provides a laser cladding near-net forming control method for a cosmetic cotton die-cutting blade, which adopts a laser cladding process, wherein the powder feeding mode is a synchronous powder feeding mode, protective gas and powder feeding gas are inert gases, and the process parameters are as follows: the laser power is 800-2500W, the scanning speed is 3-12mm/s, the air flow is 600-2000L/h, the defocusing amount is 1-12mm, and the lap joint rate is 10-50%. The invention realizes the near-net forming of the blade, improves the forming precision of the curved surface matrix cladding accumulated piece, and reduces the subsequent finish machining amount, thereby greatly reducing the workload, improving the production efficiency and effectively controlling the production cost.

Description

Laser cladding near-net-shape forming control method for cosmetic cotton die cutting blade

[ technical field ] A method for producing a semiconductor device

The invention particularly relates to a laser cladding near-net forming control method for a cosmetic cotton die cutting edge.

[ background of the invention ]

The die cutting process is used as a traditional and classical manufacturing technology and is widely applied to more than ten industries such as printing, packaging, mobile phone digital accessory products, health and medical products, electronic tags and the like. Because the traditional flat-pressing die cutting equipment has the series of problems of poor safety, low automation degree, high energy consumption and the like and is being eliminated by the market, the market of rotary die cutting equipment is expanded sharply.

The core component of the rotary die cutting equipment is a die cutting tool rest which consists of a die roller, a round roller and a die frame. Wherein the roller body of the die roller is provided with a blade according to the shape of a processed product. The die roller and the round roller are kept in certain pressure contact under the action of the die frame. In the production process, the two roller bodies rotate relatively, the material is continuously fed, and under the press cutting action of the cutting edge, the product with the same shape can be processed, and the quality and the precision of the target product are mainly determined by the manufacturing precision of the cutting edge of the die roller.

The invention discloses a die roller of rotary die cutting equipment, which is invented in China with the application date of 2015, 02 and 11 and the application number of 201510072031.2, and discloses a method for forming a cutting edge of the die roller of the rotary die cutting equipment. The invention discloses a two-dimensional gradient die-cutting knife roller, which is invented in China with the application number of 01610263947.0, namely 'a two-dimensional gradient die-cutting knife roller', the application date of which is 2016, 4 and 26, and discloses a method for forming a blade of the two-dimensional gradient die-cutting knife roller. However, the two inventions can not realize the accurate control of the height and the width direction of the blade cladding stacking piece and realize the accuracy control requirement of the rotating die cutting blade near-net-shape forming control method.

[ summary of the invention ]

The invention aims to solve the technical problem of providing a laser cladding near-net-shape forming control method for a cosmetic cotton die cutting edge.

The invention is realized by the following steps: a laser cladding near-net forming control method for a cosmetic cotton die-cutting blade adopts a laser cladding process, the powder feeding mode is a synchronous powder feeding mode, protective gas and powder feeding gas are inert gases, and the process parameters are as follows: the laser power is 800-2500W, the scanning speed is 3-12mm/s, the air flow is 600-2000L/h, the defocusing amount is 1-12mm, and the lap joint rate is 10-50%.

Further, in the laser cladding process, the included angle between the cladding nozzle and the normal line of the curved surface of the die roller substrate is controlled to be 0-10 degrees.

Further, in the laser cladding process, for the same cladding layer, the laser scanning path is in the order from the middle to both sides.

Further, in the laser cladding process, the precision control method of the cladding layer in the height direction is to realize the precision control of the height direction by adjusting the defocusing amount, and the height and the defocusing amount meet the following formula:

y＝-4.556x+7.337(0＜x≤0.5)，y＝-2.986x+6.552(0.5≤x≤1)

wherein, y refers to the defocusing amount, and x refers to the cladding layer height (x is more than 0 and less than or equal to 1)

Further, for the same cladding layer, the precision control method of the cladding layer in the width direction is as follows:

when the width of the remaining area is less than half way, selecting the lapping rate of 35-50%;

when the width of the remaining area is larger than half track and smaller than the width of the whole track, the lapping rate is selected to be 10% -15%.

The invention has the advantages that: the method solves the defects of near-net forming precision control in the laser cladding manufacturing of the cosmetic cotton die cutting blade at present, and also solves the problem that the service life of the traditional milling blade is short in the processing process, thereby greatly reducing the manufacturing cost of the blade, shortening the manufacturing period and providing an effective method for the near-net height and width precision forming control of the die cutting blade; the near-net forming of the cutting edge is realized, the forming precision of the cladding stacking part in the width direction and the height direction on the curved surface substrate is improved, the subsequent finish machining amount is reduced, the workload is greatly reduced, the production efficiency is improved, the production cost is effectively controlled, and the service life of the finally obtained formed part is longer than that of a common milling die cutting tool.

[ description of the drawings ]

The invention will be further described with reference to the following examples with reference to the accompanying drawings.

FIG. 1 is a schematic view showing the structure of a cotton pattern cutter roller according to the present invention.

Figure 2 is an enlarged cross-sectional view of the blade body of the present invention.

FIG. 3 is a drawing showing the same scan path of the cladding layer in the present invention.

Figure 4 is a front view of the blade body path of the present invention.

Figure 5 is a side view of the blade body path of the present invention.

[ detailed description ] embodiments

Referring to fig. 1-2, a cotton dressing die cutter roller 100 comprises a die roller base 1, a left support shaft 2 and a right support shaft 3, wherein the left support shaft 2 and the right support shaft 3 are respectively arranged at the left side and the right side of the die roller base 1; the die roller matrix 1 is provided with a plurality of blade bodies 4, and the blade bodies 4 are circular. The blade body 4 comprises a base layer 41, a transition layer 42 and a cladding layer 43 which are connected in sequence from inside to outside, and the cladding layer 43 forms a blade edge. And the left end and the right end of the die roller matrix 1 are respectively provided with a protective ring 5, and the top end of the protective ring 5 is higher than the top end of the blade body 4. The diameter of the die roller matrix 1 is phi 100 mm-phi 200 mm.

A laser cladding near-net forming control method for a cosmetic cotton die-cutting blade adopts a laser cladding process, the powder feeding mode is a synchronous powder feeding mode, protective gas and powder feeding gas are inert gases, and the process parameters are as follows: the laser power is 800-2500W, the scanning speed is 3-12mm/s, the air flow is 600-2000L/h, the defocusing amount is 1-12mm, and the lap joint rate is 10-50%.

Referring to fig. 1 and 3 again, in the laser cladding process, the included angle between the cladding nozzle and the normal of the curved surface of the mold roll matrix 1 is controlled to be 0-10 °. When cladding is carried out on the curved surface of the die roller matrix 1, cladding of a circular track is carried out on the cladding nozzle 6, and reasonable utilization of powder is guaranteed in the rotating direction of the nozzle. In the laser cladding process, for the same cladding layer 43, the laser scanning path is in the sequence from the middle to two sides, so that the negative effect of heat accumulation on a triangular cladding accumulation piece can be reduced. When multilayer and multi-pass lap cladding is carried out, the cladding layer 43 has the phenomenon of melting and re-solidifying, and different cladding paths can influence and even lead to the fact that a cladding accumulation piece cannot be formed. The accumulation forming of the cladding part of the die roller matrix 1 is carried out through a scanning path from the middle to two sides, and finally, the forming width precision is greatly improved; the cladding height of the multilayer cladding piece is accurately controlled by adjusting the offset of the cladding nozzle 6.

In the laser cladding process, the precision control method of the cladding layer 43 in the height direction is that the height and the defocusing amount meet the following formula:

y＝-4.556x+7.337(0＜x≤0.5)，y＝-2.986x+6.552(0.5≤x≤1)

wherein, y refers to the defocusing amount, and x refers to the cladding layer height (x is more than 0 and less than or equal to 1)

Through the selected laser cladding process parameters, the height and the defocusing amount can meet the above formula by adjusting the upper and lower offset of the cladding nozzle 6, so that the height direction can be accurately adjusted, the height direction of the curved surface matrix cladding stacking piece can be accurately controlled, the height direction forming precision is effectively improved, the grinding processing amount is reduced, the height of each layer is adjusted by adjusting the offset of the cladding nozzle 6, the height value of each layer is the same, and the height precision of the triangular cladding stacking piece can be improved.

For the same cladding layer 43, the precision control method of the cladding layer 43 in the width direction is as follows:

when the width of the remaining area is less than half way, selecting the lapping rate of 35-50%;

when the width of the remaining area is larger than half track and smaller than the width of the whole track, the lapping rate is selected to be 10% -15%.

The laser cladding process comprises the following specific operation methods:

step 1: according to the structure of the blade body 4, programming a cladding path program of the specific structure of the blade body 4 in an off-line state by adopting a programming language method;

step 2: carrying out simple early-stage heat treatment on the die roller matrix 1, and positioning and installing the die-cutting knife roller 100 on numerical control equipment through a clamping and positioning device;

and step 3: finishing the whole cladding forming process of the blade body 4 by adopting the programming language of the step 1, and naturally cooling the die roller matrix 1 in the air;

and 4, step 4: after cooling, performing precision detection on the height and width directions of the workpiece formed by cladding the blade body 4;

and 5: and (5) checking the blade forming condition, and waiting for entering a subsequent die roller machining program.

Fig. 2 shows that the width and height precision errors of the cladding stack part, namely the blade, obtained by the invention are within 2-5%, and the near-net forming of the die cutting blade of the curved substrate is basically realized. The invention reasonably plans the laser scanning path and can effectively control the forming precision of the height and the width of the near-net forming of the curved surface substrate blade. The height forming precision in the Y-axis direction is 0-Yn, the number of layers required for cladding and stacking is selected according to actual needs, and the number of layers a, b, c and d shown in FIG. 2 is four; the width forming precision of 0-Xn in the X-axis direction, as shown in FIG. 2, the number of layers to be clad is also selected according to the size of the blade.

Fig. 3 shows that the same layer of cladding adopts a cladding track with the middle part first and the two sides later, and the forming precision is effectively controlled by measuring the laser cladding layer 43 and the transition layer 42. Fig. 4 is a front view of a cladding circular blade path, fig. 5 is a side view of the cladding circular blade path, and fig. 4 and 5 show that an included angle beta between a cladding nozzle 6 and a normal line 11 is within (0-10 °), circular track cladding is performed according to a programming path, and a curved surface substrate is fixed in the whole process. The included angle mode shown in fig. 4 can effectively improve the powder utilization rate in the whole cladding process.

The invention solves the defects of the prior art that the near-net forming precision control of the cotton dressing die cutting edge is manufactured by laser cladding by adopting a laser cladding technology, and simultaneously solves the problem that the service life of the traditional milling cutting edge is short in processing, thereby greatly reducing the manufacturing cost of the cutting edge, shortening the manufacturing period and providing an effective method for the near-net height and width precision forming control of the die cutting knife edge. The invention realizes the near-net forming of the cutting edge, improves the forming precision of the cladding accumulation piece of the curved surface matrix in the width and height directions, namely reduces the subsequent finish machining amount and has less finish machining parts needing a machine tool or a grinding wheel and the like, thereby greatly reducing the workload, improving the production efficiency, effectively controlling the production cost and prolonging the service life of the finally obtained formed piece compared with the common workpiece.

Claims (1)

1. A cosmetic cotton die-cutting blade laser cladding near-net-shape forming control method is characterized by comprising the following steps: the laser cladding process is adopted, the powder feeding mode is a synchronous powder feeding mode, the protective gas and the powder feeding gas are inert gases, and the process parameters are as follows: the laser power is 800-2500W, the scanning speed is 3-12mm/s, the air flow is 600-2000L/h, the defocusing amount is 1-12mm, and the lap joint rate is 10% -50%;

in the laser cladding process, the diameter of the die roller matrix is phi 100 mm-phi 200mm, and the included angle between a cladding nozzle and the normal line of the curved surface of the die roller matrix is controlled to be 0-10 degrees;

in the laser cladding process, for the same cladding layer, the laser scanning path is in the sequence from the middle to two sides;

in the laser cladding process, under the condition that other process parameters are the same, the precision control method of the cladding layer in the height direction realizes the precision control of the height direction by adjusting the defocusing amount, and the height and the defocusing amount meet the following formula:

y=-4.556x+7.337（0＜x≤0.5），y=-2.986x+6.552（0.5≤x≤1）

wherein y refers to the defocusing amount, and x refers to the cladding layer height (x is more than 0 and less than or equal to 1);

for the same cladding layer, the precision control method of the cladding layer in the width direction comprises the following steps:

when the width of the remaining area is less than half way, selecting the lapping rate of 35-50%;

when the width of the remaining area is larger than half track and smaller than the width of the whole track, the lapping rate is selected to be 10% -15%.

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