RU2503723C2 - Method of computer-aided footwear cutting - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: proposed method comprises fitting of leather on digitiser stage, digitisation of leather outline and defect sections, virtual lay-up of parts with allowance fro leather geometry and defects, transmission of IN/OUT instructions to blade drives and vibrating blade drive instructions and making the cutting jobs. Video sensor automatically performs levelling in thickness and bundling. Leather outline geometry, area and reference points in contact with locating points are defined. Obtained data is transmitted to central computer. At once, digital camera arranged nearby video sensor at coordinate device indentifies leather flaws and located them. Obtained data is also transmitted to central computer for it to relay instructions to industrial robot for distribution of parts among accumulation stackers. Working platforms have the drives to displace them on track composed of top and bottom runs. Top run extending rails are connected with lifting-and-lowering devices.

EFFECT: higher accuracy and efficiency.

Description

FIELD OF THE INVENTION

The invention relates to a shoe sub-industry of light industry, in particular to automated preparatory cutting production, covering a number of operations, such as aligning the skin by thickness, determining the configuration of the skin and its defects, virtual layout of parts taking into account the geometry of the skin and the localization of defects, skin cutting, collection and layout of cut-out parts for the corresponding store-drives. The invention allows on the basis of the proposed method to reach a new, higher level of technology, reduce staff, increase productivity and quality, use the latest advances in software control systems, robotics, electronic recognition of objects, etc.

State of the art

A known method of performing preparatory cutting process, which consists of the following operations.

The whole skin or half-skin (hereinafter referred to as the skin) is set by the operator on the digitizer tablet. The operator digitizes the skin contour using a special pen or mouse, while fixing the defective areas and base marks for positioning the skin. All this is recorded in the memory of the software device and presented in the form of a virtual image.

For a given set of shoe parts, the operator, using light projection, and using special software, performs the layout of the parts, bypassing the defective areas and fulfilling certain requirements for the location of critical parts. Then another operator transfers the skin from the digitizer table to the cutting machine so that the base marks on the skin are oriented along the basal planes of the setting table of the cutting machine.

The software device of the cutting machine processes the received information into commands for moving the coordinate device, turning the knife mechanism on / off. The knife is brought to zero and the process of cutting parts begins. After carrying out the cutting of parts, the operator manually collects the parts, completes them in bundles and transfers them to another operator for the next operation to align the parts in thickness on the dowel-band machine, where each part is individually, that is, sequentially passed through the working parts of the machine, and with a band knife the skin layer is cut from the wrong side in such a way as to ensure equal thickness of the skin layer from the front side.

Literary source: Aleksandrov S.P., Balakina E.A., Belyaev L.S. Shoe Production, ed. Russian Correspondence Institute of Textile and Light Industry. M.: 2009 .-- 376 p.

Golubkova V.T., Filimonenkova R.N., Shayderov M.A. Pre-cutting production of sewing enterprises, ed. Higher School, Mn .: 2002. - 206 p.

The well-known method described above requires at least five operators to execute the preparatory cutting subprocess. Shifting the skin from one workplace to another is associated with a loss of positioning accuracy and additional idle time. Manual digitization of the skin contour and its defects is a sequential operation that is inefficient and involves significant errors. Manual collection of parts after cutting is also inefficient and necessitates a low-skilled operator, detailing the thickness alignment is much lower in productivity than aligning the entire skin, and reassembling parts into bundles for the next operation, for example, edge bending, is duplicate, requiring additional time and manual labor.

Technical result

Using the proposed invention, a method of automated preparatory cutting production of shoes, when it is implemented on the unit, it allows to reduce the number of operators, increase the accuracy of operations, increase productivity in the production area under consideration.

The number of operators is released due to the automation and parallel implementation of the operation of digitalization of the skin contour and its defects, due to the performance of the alignment of the thickness in a parallel-sequential way, instead of the sequential one used in traditional technology, by automating the collection of parts and their layout in drive stores with using an industrial robot. The accuracy of operations is improved by replacing manual operations with automatic ones - digitalization, parts collection, and also due to a reduction in the number of operations for positioning the skin. Productivity increases because advanced processing methods (parallel and parallel-serial) are used, a number of operations are reduced and automated (positioning, collection and layout of parts). The proposed method creates the prerequisites for the automation of preparatory cutting production and the transition to a low-footwear manufacturing technology.

Disclosure of invention

Salient features

The invention relates to a method for automated cutting production of shoes. A significant difference of the proposed method is that:

- alignment in thickness is carried out over the entire skin at the initial stage of the preparatory cutting production of shoes;

- skin that is aligned in thickness is installed on the working platform, oriented along two base lines, which are mutually intersecting perpendiculars, applied to the upper surface of the working platform, while the spinal line of the skin should be perpendicular to one base line and parallel to the other;

- skin that is evened out in thickness is positioned on the moving work platform once and pressed against it with the help of flexible vacuum tubes brought to the moving work platform;

- the working platform, together with the skin pressed to it and flexible vacuum tubes, goes through all the operations sequentially, being strictly fixed on each, up to the last - collecting and layout of parts in store-stores;

- determination of the geometric parameters (configuration, area) of the skin and the installation of a set of base points attached to the base lines of the skin is automatically determined by the video sensor, and the received information is transmitted to a central computer serving the devices for the automated preparation and cutting shoe production;

- determination of skin defects, their size and position on the skin (localization) is carried out by a digital camera operating on the principle of supply and reflection of electromagnetic waves, and information on defects is transmitted to the central computer;

- determination of geometric parameters and skin defects is carried out simultaneously in a parallel-sequential manner;

- information on the positioning of the skin, its configuration and defects, together with the technical specifications for the parts to be cut, is processed using the entered software and issued by the central computer as a virtual layout of the parts on the skin and by a set of appropriate commands to the coordinate device, vibro-knife mechanism and industrial robot;

- according to the information and commands received, the industrial robot collects cut-out parts and prepacks them according to the type and size of identical store-drives;

- working platforms with pressed skin pass in discrete steps along the upper branch of the rail from the initial positioning position to the final (collection and layout) and return without skin along the lower branch;

- commands for transporting work platforms with built-in drives are transmitted from the central computer;

- raising and lowering of the working platforms, as well as the extension and return to the initial position of the rail of the upper branch is carried out by the appropriate drives on commands from the central computer.

Summary of the invention

The basis of the invention is the task of developing a method of automated preparatory cutting shoes production, which allows to increase productivity and accuracy of operations, reduce the cost of living labor (number of operators), automate a number of labor-intensive operations, bring the production process to a new qualitative level.

The technical result of the implementation of the claimed method of automated preparatory cutting is to reduce at least two times the number of operators and, accordingly, increase productivity by automating the process of digitizing the skin contour, detecting and localizing skin defects, replacing the sequential method of leveling the thickness with a more productive one in parallel - sequential, automation of the collection and layout of parts for the respective store-drives. Improving the accuracy of operations is carried out due to a single positioning of the skin on the working platform, on which all subsequent operations are performed and the number of manual operations (collection and layout of parts) are replaced with automatic ones.

The automated preparatory cutting-shoe production method includes four basic complex operations:

1. Alignment of the skin by thickness on a wide-pass dairies and tape machine under the control of the operator.

2. Aligned skin by the same operator is installed on the work platform and positioned along the base lines applied to it in the form of mutually perpendicular lines, while the ridge line on the skin should be parallel to one installation perpendicular and perpendicular to another. The position of the skin is fixed by flexible vacuum tubes. A video sensor moving with a coordinate device and located above a fixed-skin working platform determines the skin configuration and the location of the base points in contact with mutually perpendicular lines. This information is transmitted to a central computer for measuring and storing the geometric parameters of the skin and the position of the base points. Together with the video sensor, the digital camera also moves, which transmits images of skin defects and their location. Information on the position of defects and their sizes is fed to a central computer for recognition, identification, measurement and localization.

3. The working platform with the skin then, using its own drive, moves to the set position under the coordinate device with a vibrating knife. The central computer, having processed the input information and created a virtual layout of parts, sends a command to the coordinate device to bring the vibro-knife to the zero mark. Then, the skin is cut into parts with a vibro-knife, in accordance with commands from the central computer, which come on to turn on / off the vibro-knife and move it along the contours of the parts to be cut.

4. The working platform with the cut out details is moved to the unloading zone, the vacuum lock is turned off and the industrial robot, having received commands from the central computer, collects the parts and their layout according to the corresponding store-drives.

The working platform, freed from parts and waste, with the help of a lifting and lowering device and a sliding system, the rail is lowered from the upper branch of the rail to the lower branch of the rail. The drive of the working platform, on command from the central computer, returns the working platform along the lower branch of the rail to the place of the installation and positioning of the skin, where the lifting and lowering device, working in conjunction with the rail extension system, sets the working platform to its original position for positioning the skin, and the cycle repeated.

List of figures, drawings

Figure 1 shows a block diagram of an automated preparatory cutting shoe production.

The above block diagram reflects the sequence of operations, physical and information flows characterizing the proposed method.

The implementation of the invention

The proposed method is as follows.

The skin coming from the warehouse is fed by the operator to operation 1 (Fig. 1) —alignment of the skin by thickness, which is performed by a dowel-tape machine having a wide passage for the treated skin. The thickness of the lined skin is set in accordance with the technical specifications by adjusting the position of the working bodies of the dowel-tape machine.

After the operation of leveling the skin by thickness, the waste (splits) automatically fall into the hopper, and the leveled skin by the same operator is placed on the work platform (beginning of operation 2), positioned on it by touching one protruding point on the side line of the skin and one protruding point on the frontal line of the skin of the base lines applied to the surface of the working platform in the form of mutually perpendicular lines, while the ridge line on the skin should be parallel to one perpendicular line and perpendicular to the other. To fix the positioned position of the skin on the work platform, flexible vacuum tubes are attached that are attached to the bottom of the work platform. Located on top of the working platform on the coordinate device, the video sensor determines the configuration of the skin and the position of the base points on the skin that are in contact with mutually perpendicular lines. The received information is transmitted to a central computer for further processing.

At the same time, the digital camera located on the coordinate device along with the video sensor scans the skin, determines its defects, their size and location on the skin, that is, localizes them. Information about defects on the skin is also transmitted to the central computer.

Next, the working platform with the skin with the help of its own drive moves to the next position, where its position is strictly fixed under the executive coordinate device with a vibro-knife for operation 3 - cutting the skin with a vibro-knife. The skin received at operation 3 is evened out in thickness, its configuration is digitized, defects are identified and localized.

In the central computer, on the basis of the technical specifications and available software, as well as the information received about the skin configuration, its defects, and base points, a virtual layout of the parts, the types and sizes of which are set, is performed on the image of the specific skin transferred to operation 3. The central computer issues commands to turn on / off the working movement of the knife blade, commands to the executive coordinate device to bring the vibro-knife to the zero position and to move the vibro-knife along the skin field to carry out the percent Essa cutting leather into details.

A work platform with leather cut into parts is moved to the next fixed position to perform operation 4 — collection and layout of parts in drive stores. In this position, flexible vacuum tubes are turned off, holding the skin pressed to the upper surface of the working platform. The central computer submits information to the industrial robot on the types and sizes of cut parts and the corresponding storage stores, and the industrial robot collects the parts and places them strictly according to the storage stores intended for each part.

In stores-stores there will be shoe parts laid out by type and size, which will be subsequently transferred for processing to the following operations in accordance with the selected technology.

Waste (defective areas, intermodel bridges, etc.) enter the hopper.

The freed working platforms along the lower branch of the rail return to their original position in operation 2.

Carrying out the preparatory cutting process according to the proposed method should provide an effect on productivity and quality, reduce the number of operators, automate a number of previously performed operations manually.

Claims (1)

A method of automated preparatory cutting production of shoes, which includes installing leather on a digitizer tablet, digitizing the skin contour and defective areas, transporting leather to the cutting machine desktop, conducting virtual layout of parts taking into account the geometry of the skin and defects, transmitting on / off commands to the mechanism knife, commands the coordinate device to move the vibratory knife, the operation of cutting parts, alignment with thickness, followed by a complete set, characterized in that the operation of equalizing the thickness of the entire skin is carried out in a parallel-sequential manner, the positioning of the skin and its fastening by flexible vacuum tubes is carried out once on the working platform along the basing lines, which are mutually intersecting perpendiculars applied to its upper plane, the geometry of the skin contour, its area is automatically determined by a video sensor. and the position of the base points on the skin in contact with the baseline, the received information is transmitted to the center a computer, at the same time a digital camera located next to the video sensor on the coordinate device automatically detects skin defects and their localization when the latter moves, passing the received information also to the central computer, which tells the industrial robot to collect and store parts after the cutting operation, drives; working platforms with skin having their own drives are moved from operation to operation along a rail consisting of lower and upper branches, the upper branch rails sliding apart connected to lifting and lowering devices.

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