WO2017086575A1

WO2017086575A1 - Tire tread pattern laser engraving system

Info

Publication number: WO2017086575A1
Application number: PCT/KR2016/008860
Authority: WO
Inventors: 고형문
Original assignee: 주식회사 써드아이
Priority date: 2015-11-19
Filing date: 2016-08-11
Publication date: 2017-05-26
Also published as: KR101803804B1; CN108349183A; KR20170058666A

Abstract

The present invention relates to a tire tread pattern laser engraving system and, more specifically, to a tire tread pattern laser engraving system which can complete a patterned tire by the mapping of measured current shape information of a tire (T) to be processed and design 3D data (DL) of a tread to be engraved, performing conversion into a three-dimensional stereographic pattern image, and performing engravement with a laser, and can improve the accuracy and efficiency in tread pattern formation.

Description

Tire Tread Pattern Laser Engraving System

The present invention relates to a tire tread pattern laser engraving system, and more particularly, to three-dimensional three-dimensional pattern image by mapping the measured current shape information of the target tire (T) and the design 3D data (DL) of the tread to be carved. The present invention relates to a tire tread pattern laser engraving system, which can be used to finish a pattern tire by converting it into a laser, and then improving the accuracy and efficiency of the tread pattern formation.

In general, a vehicle is a means of movement in which a mounted timer is driven by a force that causes friction with the ground, and a surface on which the tire is grounded is called a tread.

The tire tread is inscribed with a main groove, an auxiliary groove, and other grooves and patterns to form a pattern. This is called a tread pattern. One of the most important functions of the tread pattern is drainage in rain.

As such, the tread pattern formed on the tread portion of the tire smoothly induces drainage through various positive and negative structures, thereby eliminating water film phenomenon and improving traction and braking force.

Therefore, when the tread portion of the tire is over-weared or single-weared, the drainage function may not be properly exhibited, which may cause a risk of water filming, and the vehicle may fall down to the road grip and braking force.

On the other hand, the tread pattern of a tire mainly uses the method of carving in the tread part of a flat tire, and the method of manufacturing a metal mold and forming a pattern.

Here, the engraving method is a method of engraving the pattern on the tread portion by using a blade or the like after fixing the tire by mounting the tire in the horizontal direction in the tire carved stand after mounting the tire on the wheel.

However, such a tread pattern engraving method has a problem that the precision is low and takes a lot of time.

On the other hand, the mold method is a method of manufacturing a mold in which the tread pattern is carved, inserting a flat pattern tire into the mold and then processing to form a pattern and a groove in the tread portion.

However, this method requires a lot of manufacturing costs due to the problem of having to modify the designed pattern even if the existing mold is used, even if the existing mold is used. There is a troublesome and time-consuming problem.

Therefore, the engraving method is mainly used when a small quantity needs to be produced for research purposes for an experiment or a tread test, and the mold method is used when a tread pattern is finally completed and mass production is possible.

Prior art literature

Patent Literature

(Patent Document 1) Korean Patent Registration No. 10-0365962 (2002.12.11.) 'Tire tread pattern engraving device'

The present invention was created in view of the above-mentioned problems in the prior art, and was created to solve the problem. The present shape information of the measured target tire T and the design 3D data DL of the tread to be sculpted are mapped to 3 The main purpose is to provide a tire tread pattern laser engraving system that can convert the pattern into a three-dimensional pattern image and then engrav it with a laser to complete the pattern tire, and improve the accuracy and efficiency of tread pattern formation. have.

The present invention is a means for achieving the above object, a guide rail; A stand movable along the guide rail; A fixing bracket installed to be tiltable on a vertical portion of the stand; A target tire fixed to the fixed bracket and installed to be rotatable by a motor; A shape detecting sensor installed at intervals around the processing target tire and detecting a shape of the processing target tire; A tire tread pattern laser engraving system, comprising: a processing unit for engraving a tread designed by irradiating a laser beam according to a shape of a processing target tire detected by the shape detecting sensor on a surface of the processing target tire. to provide.

In this case, the shape detection sensor may be installed to be protruded toward the processing target tire, the processing unit may be installed to be lowered toward the processing target tire.

In addition, the processing unit includes a DBET (Dynamic Beam Expander Transmitter) for adjusting the focus of the laser light, a galvanometer motor set for adjusting the mirror to guide the laser light reflection in the X-axis, Y-axis direction, and the laser beam It is preferable to include a telecentric lens (Telecentric Lenz) to guide the engraving area of the tire, and a control board for controlling the engraving position.

In addition, the DBET may change the focal length of the tire to be processed by adjusting the refractive angle of the laser beam.

In addition, the control board includes a data processing unit for generating 3D data for engraving, the engraving data extracted from the engraving 3D data processed by the data processing unit, and read from the encoder mounted on the motor for rotating the processing target tire It is preferable to control the driving of the galvanometer motor set and the DBET using the current position data of the tire to be processed.

According to the present invention, the following effects can be obtained.

First, since the shape of the tire to be sculpted using a sensor is measured and then the first designed tread pattern is deformed and sculpted to fit the tire shape, precise tread engraving is possible.

Secondly, the mass production tires of the mold method is not applicable to the method of producing a small amount for the experiment because the mold manufacturing cost is high, the laser engraving method can reduce the mold manufacturing cost.

Third, the conventional tire development requires a person to carve a tread by hand using a cutter, which requires a skilled worker, is not only time-consuming and expensive, but also inferior in precision, but using a laser saves time and requires no expert. , The precision is improved.

Fourth, a large tire for trucks has a hard surface and a large amount to be carved, making it difficult to carve by human hands, but lasers can be easily and quickly and efficiently carved.

1 is an exemplary perspective view of a tire tread pattern laser engraving system according to the present invention.

2 is an exemplary configuration block diagram of a processing unit constituting the tire tread pattern laser engraving system according to the present invention.

Figure 3 is an exemplary view showing a tread pattern generation example when engraving using a tire tread pattern laser engraving system according to the present invention.

Figure 4 is an exemplary view showing a working example of engraving using a tire tread pattern laser engraving system according to the present invention.

5 is an exemplary view showing an example of adjusting the refractive angle of the laser beam in the tire tread pattern laser engraving system according to the present invention.

6 to 7 are exemplary views showing a local processing example of the laser beam when engraving using the tire tread pattern laser engraving system according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

Prior to the description of the present invention, the following specific structures or functional descriptions are merely illustrated for the purpose of describing embodiments according to the inventive concept, and the embodiments according to the inventive concept may be implemented in various forms, It should not be construed as limited to the embodiments described herein.

In addition, embodiments in accordance with the concepts of the present invention may be modified in various ways and may have various forms, specific embodiments will be illustrated in the drawings and described in detail herein. However, this is not intended to limit the embodiments in accordance with the concept of the present invention to a particular disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

As shown in FIG. 1, the tire tread pattern laser engraving system according to the present invention includes a pair of guide rails 100.

The guide rail 100 is disposed (arranged in the Y-axis direction) on the bottom surface of the work space, and the stand 200 which is slidable along the guide rail 100 is seated thereon.

At this time, the stand 200 is a plate-like member formed in a substantially 'b' shape having a horizontal portion 202 forming an XY horizontal plane and a vertical portion 204 forming a YZ vertical plane, and is driven by a driving means (not shown). The movement along the guide rail 100 is designed to be controlled.

In addition, a fixing bracket 210 having a substantially 'a' shape is fixed to the vertical portion 204 of the stand 200 through the bracket shaft 220.

Although not shown in this case, a driving means such as a motor is installed on the outer surface of the vertical portion 204 of the stand 200 to rotate the bracket shaft 220, and the fixing bracket 210 is left or right. Precise control so that it can tilt.

In addition, the fixing bracket 210 is rotatably fixed to the processing target tire (T) by a driving means such as a motor.

In this case, the processing target tire T means a state in which the tire is mounted on the wheel, and the portion fixed to the shaft may be regarded as the wheel portion.

Therefore, the processing target tire T can be moved in the longitudinal direction (Y axis) of the guide rail 100 by the stand 200 moving along the guide rail 100, and can be rotated 360 ° in place. Thus, the tire can be engraved in the width direction, and in accordance with the rotational flow of the bracket shaft 210, even the edges inclined at a predetermined curvature in both width directions of the tire can be engraved.

However, since the movement of the stand 200 can increase the moving width, it is easy to understand that the movement of the stand 200 is applied only to the case of a large tire, for example.

In addition, the shape detecting sensor 300 is provided at intervals, for example, directly above the processing target tire T.

The shape detecting sensor 300 is aligned with the optical axis (laser light), which is the Z axis, and is configured to be movable in the Y axis direction.

At this time, the means for advancing the shape detecting sensor 300 can be a variety of known means, for example, may be a variety of oil, pneumatic cylinder, LM guide, ball screw and the like.

In addition, the shape detection sensor 300 is also a known sensor, there can be a variety of forms, one of which can illustrate a vision camera.

The shape detecting sensor 300 is for automatically detecting the width, curvature, etc. of the tire T, that is, the tread pattern is not formed yet, is operated before engraving, that is, measuring the appearance of the tire. When the measurement is completed, it is retracted in the Y-axis direction so as not to cover the engraving area when the laser light is irradiated.

In addition, the processing unit 400 is installed on the upper side of the shape detecting sensor 300 with a gap therebetween.

The processing unit 400 is configured to adjust the height in the vertical direction (Z axis) by using a known driving means, in particular, as shown in Figure 2, DBET (Dynamic Beam Expander Transmitter) for adjusting the focus of the laser light 410, a galvanometer motor set 420 for adjusting the laser light in the X- and Y-axis directions, a telecentric lens 430 for guiding the laser light into the engraving area, and It includes a control board 440 to accurately control the position.

In this case, the DBET 410 is a means for adjusting the focal length, that is, the distance in the Z-axis direction from the telecentric lens 430 to the surface of the tire T to be processed by adjusting the refraction angle of the laser beam.

In this case, the laser can be carved into the tire without modifying the tread properties of the tire, so it does not matter anything.

Since the refractive angle of the laser beam passing through the telecentric lens 430 is changed by adjusting the thickness of the laser beam through the adjustment of the DBET 410, the position of the focal point is naturally changed to be engraved on the processing target tire T. This will allow you to vary the depth of the tread.

More specifically, (a) of FIG. 5 illustrates the case where the focal length is close, (c) the case where the focal length is far, and (b) is the middle of (a) and (c).

For example, the inside of the DBET 410 is provided with a fixed convex lens and a movable concave lens, as shown in (b) of FIG. 5 based on the focal point F when the concave lens and the convex lens maintain a certain distance accurately. As the concave lens moves toward the convex lens and moves closer to the convex lens as shown in (a), since the laser beam L does not spread far, the focal point F is formed close to the convex lens, and the refractive angle is rapidly increased. When the concave lens moves away from the convex lens, the laser beam L spreads far away, and thus the focal point F is formed far from the convex lens so that the refractive angle becomes smoothly small.

Therefore, by adjusting the angle of refraction using this characteristic it is possible to vary the depth of the tread to be carved on the processing target tire (T).

In addition, the galvanometer motor set 420 is a means capable of controlling a very fine distance movement or rotational movement by using a galvanometer which is a mechanism that reacts to a very small current or voltage.

The galvanometer motor set 420 is provided with a mirror 422, respectively, and adjusts the angle of the mirror 422 to convert the laser beam L, which goes straight in the horizontal direction, to the vertical direction to telecentric lens 430 Through) to adjust the position irradiated to the processing surface of the processing target tire (T).

Such adjustment of the galvanometer motor set 420 is to be finely controlled through the control board 440, the shape of the tread, especially the depth of the laser beam (L) in the shape as shown in Figure 4 By repeating this, the desired depth can be processed.

Of course, in this case, the DBET 410 will also be controlled by the control board 440 to vary the focus F.

In addition, the telecentric lens 430 is a lens that can be engraved by always irradiating the laser beam (L) in the vertical direction irrespective of the position of the lens object.

Therefore, in the case of a general lens, since the laser beam L passes through as shown in the example of FIG. 5, a blind spot occurs when the tread of the target tire T is processed, but the telecentric lens 430 of the present invention. ), The blind spots hardly occur as shown in FIG. 6.

This is because the light (including the laser) passing through the lens is perpendicular due to the characteristics of the telecentric lens 430.

In addition, the control board 440 is read from the engraving data extracted from the 3D data for engraving processed by the data processing unit 442, and from the encoder 444 mounted to the motor (M) for rotating the processing target tire (T). The driving of the above-described galvanometer motor set 420 and DBET 410 is controlled by using the current position (rotation, direction, etc.) data of the processed tire T.

At this time, the data processing unit 442 maps the current shape information of the processing target tire T measured from the shape detecting sensor 300 and the design 3D data DL of the tread to be sculpted as shown in FIG. 3. 3D data PL for the tread piece is generated.

In this manner, when the 3D data PL for tread engraving is generated, the control board 440 combines the current position information of the target tire T received from the encoder 444 with the 3D data PL for tread engraving. To extract the fragment data DAT required for control.

Therefore, when the fragment data DAT is extracted, fragmentation is possible immediately.

To better understand the present invention, the following reference is made to the following [reference].

[Reference]

First, T0, T1, T2, T3, and T4 are measured points of the tire T to be processed to obtain a spline curve, that is, Tz = f1 (Ty) through these measurements. In this case, Ty is the y-coordinate value of the spline curve tire, Tz is the z-coordinate value of the spline curve tire, and the reason why the coordinates are expressed in y-z is to match the above-described system.

In this case, DL is the design 3D data (DL) of the tread to be sculpted, and the graph describes a process of creating 3D data (PL) for tread engraving by mapping it.

S is a point to be obtained, L1 is a distance from the plane to S, L2 is a distance equal to L1 on the curve f1 (Ty), and a point L2 is T.

In addition, the y-coordinate value for S on DL designed as a plane is Sy, the y-coordinate value of T in the spline curve is Ty, and the z-coordinate value of T is Tz.

The function Ty = f2 (Sy) is obtained using the relationship between the Sy value of L1 and the Ty value of L2 (spline curve).

Furthermore, since the Tz value can be obtained from the Ty value by using a function of Tz = f1 (Ty), (Ty, Tz), which is the coordinate value of T, can be obtained.

To sum up, Ty = f2 (Sy) and Tz = f1 (Ty) allow mapping of 3D data designed in plane to 3D data for measured pieces.

The present invention made up of such a configuration has the following operational relationship.

First, the design 3D data DL in which the tread is designed to engrave the tread on the tire T to be processed using a laser is loaded into the data processor 442.

In this state, the object to be processed tire T is mounted on the stand 200.

Subsequently, the shape detecting sensor 300 is driven to scan the processing target tire T to generate shape information such as a processing surface of the processing target tire T.

Thereafter, the generated shape information is transmitted to the data processor 442.

In this way, when the shape information is received, the data processing unit 442 maps the design 3D data DL and the shape information to generate 3D data PL for tread carving to be actually carved.

In this way, when the preparation is completed, the control board 440 is the processing target tire (T) rotation motor (M) and the encoder 444 installed on the stand 200 to check the position information of the processing target tire (T). The current positional information of the tire to be processed T is received.

If the tire does not rotate, it is very easy to find only the point that is mapped from the plane to the curve, but the present invention rotates at a fixed speed, so the moment the laser is irradiated to the point, the unwanted point is engraved. A problem arises. Therefore, the exact position can be engraved by irradiating the laser to reflect such rotation variables.

The engraving data DAT is extracted from the 3D data PL for tread carving and the current position information of the tire T to be processed.

When the extraction of the manipulation data DAT is completed, each device is driven to irradiate the laser beam L to form a tread on the surface of the tire T to be processed according to the tread pattern. That is, sculpt the tread.

As described above, the present invention can automatically detect the current state of the tire from the design information, and then obtain the information necessary for the actual control from the combined information, so that very precise and accurate tread shapes can be engraved and mechanically performed. This is a quick and easy advantage. In particular, there is no need for a skilled sculptor.

Explanation of the sign

100: guide rail 200: stand

300: shape detection sensor 400: processing unit

Claims

Guide rails;

A stand movable along the guide rail;

A fixing bracket installed to be tiltable on a vertical portion of the stand;

A target tire fixed to the fixed bracket and installed to be rotatable by a motor;

A shape detecting sensor installed at intervals around the processing target tire and detecting a shape of the processing target tire;

And a processing unit for engraving a tread designed on the surface of the processing target tire by irradiating a laser beam according to the shape of the processing target tire detected by the shape detecting sensor.
The method according to claim 1,

The shape detection sensor is installed to be protruded toward the processing target tire, the processing unit is a tire tread pattern laser engraving system, characterized in that installed to be able to move up and down toward the processing target tire.
The method according to claim 1,

The processing unit includes a DBET (Dynamic Beam Expander Transmitter) for adjusting the focus of the laser light, a galvanometer motor set for adjusting the mirror to guide the laser light in the X, Y direction, and the laser beam engraving area of the target tire A tread pattern laser engraving system comprising: a telecentric lens (Telecentric Lenz) and a control board for controlling the engraving position.
The method according to claim 1,

The DBET is a tire tread pattern laser engraving system, characterized in that for varying the focal length formed on the tire to be processed by adjusting the angle of refraction of the laser beam.
The method according to claim 3,

The control board includes a data processing unit for generating 3D data for engraving, the processing object read from the engraving data extracted from the engraving 3D data processed by the data processing unit, and the encoder mounted on the motor for rotating the processing target tire A tire tread pattern laser engraving system characterized by controlling the driving of a galvanometer motor set and a DBET using current position data of the tire.