RU182588U1 - PRODUCT SURFACE GEOMETRIC CONTROL DEVICE - Google Patents

Abstract

The utility model relates to the means of control and measuring equipment, namely to automated non-contact measuring devices for monitoring the geometric parameters of the surface profile, in particular pipe threads, lock couplings and similar products, including threads. The device for monitoring the geometric parameters of the surface of the product contains an optical meter mounted on a carbon fiber console, a mechanical movable module, a control unit. The mechanical movable module is represented by a frame, a vertical displacement unit, a platform and an eccentricity unit, on which a carbon fiber console is installed. The latter is equipped with a micromotor assembly of the optical meter. The control node is configured to synchronize the output signals and the spatial position of the optical meter and with the ability to exchange data with an external computer node. The technical result consists in compensating for errors arising due to operating conditions when measuring the geometric parameters of the surface of the product and the design features of the product. 4 s.p. f-ly; 4 ill.

Description

Technical field

This utility model relates to measuring and measuring equipment, namely, automated non-contact measuring devices for monitoring the geometric parameters of a surface profile, in particular pipe threads, lock couplings and similar products, including threads. The invention can be used, in particular, in the metallurgical and oil and gas industry.

State of the art

The prior art various technical solutions designed to control the geometric parameters of the surface of the product, in particular thread.

In one example from the prior art, a device is disclosed for monitoring a threaded pipe section (Utility Model Patent RU 19915, publ. 10/10/2001). The device contains means for acquiring information, a scanning mechanism made in the form of a cylindrical pipe, a coordinate table. The scanning mechanism is made to rotate around a longitudinal axis. The coordinate table is made with the possibility of movement along the longitudinal axis of the controlled product. Means for collecting information are represented by semiconductor lasers and photodetector arrays.

However, the known solution, in particular, does not allow comprehensive measurements of the controlled product, since the movable elements of the device provide the movement of the means of information retrieval only around and along the longitudinal axis of the controlled product.

In another example from the prior art, a device for scanning controlled objects is disclosed (patent for invention RU 2597147, publ. 09/10/2016). The device contains a sensor used to scan the controlled surface of the object, which is mounted on a support, driven by an electric motor.

However, the known solution also will not be able to provide comprehensive measurements of the controlled product due to the incomplete spatial movement of the sensor.

Closest to the present utility model for the purpose and combination of essential features is the technical solution disclosed in the patent for invention RU 2477453 (publ. 03/10/2013). The device for measuring the parameters of the thread contains a movable mechanical system, a laser proximity sensor, means for synchronizing the output signals of the sensor with the spatial position of the movable mechanical system and a computer. The laser proximity sensor is mounted on a mechanical system using a support. The mechanical system is configured to direct the sensor in accordance with various types of scanning. The computer is designed to control the mechanical system and the sensor, create computer images of the thread shape of the scanned object, to store images and analyze computer images to obtain quantitative information about such characteristics of the thread as bevel, seal diameter and ovality, approach, run, thread diameter, step along several pipe generators and step height.

However, the known technical solution has several disadvantages. In particular, the support according to the description is made of aluminum, which reduces the range of conditions in which the operation of the device is possible without reducing the reliability of the level of measurement error, on the basis of which the thread is monitored. Moreover, in the known device, the movement nodes allow you to set the exposure of the measuring sensor relative to the coordinate system of the test object (product surface) according to its dimensions, but do not compensate for measurement errors for products whose constructive design requires a finer setting of the exposure of the measuring sensor directly during the measurement process .

Utility Model Disclosure

The present utility model is based on the technical task of increasing the reliability of control when measuring geometric parameters of the surface of a product, in particular, its internal and external threads.

The technical result consists in compensating for errors arising due to operating conditions when measuring the geometric parameters of the surface of the product and the design features of the product.

According to the utility model, the technical result is achieved due to the fact that the device for monitoring the geometric parameters of the surface of the product contains an optical meter mounted on a support, a mechanical movable module that is configured to change the spatial position of the support with an optical meter, a control unit configured to synchronize output signals and spatial position of the optical meter and with the ability to exchange data with an external computer node, p and this mechanical movable unit is further provided with a node of the eccentricity, the support is represented carbon fiber console mounted on the eccentric assembly and provided with an optical node micromovings meter.

In particular, the optical meter is represented by a two-dimensional optoelectronic sensor.

In particular, the microdisplacement unit of the optical meter is equipped with a displacement sensor represented by an encoder.

In particular, the mechanical movable module is represented by a frame made with the possibility of horizontal movement on the supporting plane, a vertical movement unit that is mounted on the frame, a platform made with rotation and mounted on the vertical movement unit.

In particular, the mechanical movable module is equipped with displacement sensors represented by encoders and mounted on each node, which is arranged to move or rotate.

The set of essential features of the proposed solution compared to the prototype includes distinctive features, namely: the inclusion of an additional eccentricity unit in the mechanical mobile module, the support in the form of a carbon fiber console mounted on an eccentricity unit and equipped with a micromotion unit of the optical meter. Consequently, it can be assumed that the present utility model meets the eligibility condition “Novelty”.

The implementation of this utility model is possible using well-known materials and products. Therefore, it can be assumed that the present utility model meets the patentability condition “Industrial Applicability”.

Brief Description of the Drawings

This utility model is illustrated by the following drawings:

- in FIG. 1 shows a structural diagram of a device for monitoring the geometric parameters of the surface of the product;

- in FIG. 2 is a perspective view of a device for monitoring geometric parameters of a surface of a product;

- in FIG. 3 is a side view of a device for monitoring geometric parameters of a surface of a product;

- in FIG. 4 is an image of a console with an optical meter and a device for its microdisplacement.

Utility Model Implementation

The device for monitoring the geometric parameters of the surface of the product is a comprehensive control and measuring tool designed for stationary use in workshops, laboratories, as well as as part of conveyor lines. The device allows for 3D scanning and complex measurement of the geometric parameters of the surface of cylindrical products, in particular, pipe threads, lock couplings, etc.

Using the device, a 100% non-contact scanning of the thread surface with high accuracy is provided, all types of marriage are detected. The scan result is a cloud of points of the measured surface in absolute values with the required metrological characteristics, as well as geometric parameters according to the standard used in the enterprise, GOST, API in tabular and graphical form.

In the event that the pipe thread acts as the measurement object, the parameters of the thread according to the standards in the GOST and API system can act as controlled parameters: thread pitch, profile height, tilt angles of the sides of the profile, radius of curvature of the tip of the profile, radius of curvature of the cavity of the profile, angle inclination, taper, diameter of the cylindrical recess, angle of the chamfer, interference fit on the threaded gauge, perpendicularity of the end face of the coupling relative to the axis of the thread, alignment, difference in thread diameter (ovality), profile shape In accordance with GOST 633-80, API 5CT 9ed, API 5B. These standards provide a list of parameters that are mandatory for measurement for the reliable operation of compounds of this type, however, for the purposes of this application, the list of the above parameters is approximate, but not exhaustive. It is assumed that the threaded product is cleaned from contamination, rust, and the like before measurement. using third-party equipment.

Defects in threaded joints include: lack of a thread tip, scratches and nicks on the slopes of the profile, thread rupture, mismatch of taper and average diameter, misalignment, surface defects.

As shown in FIG. 1, the device’s local network connects the optical meter 1, the signal reception board of the displacement sensors 3, the motor control board 4 and the control node 5. The interaction of these nodes is provided by the Ethernet communication line 2 via protocols from the TCP / IP stack. The control unit 5 is configured to interact with an external computer node, for example, a computer or a local area network of an automated process control system (ACS TP) of workshop 6. The signal reception board 3 interacts with displacement sensors, which are represented by encoders 8. The control board 4 interacts with motors 8. Encoders 7 and motors 8 are connected to a power source 9.

Data collection on the test object 10 is carried out by an optical meter 1, which includes a laser source 11, a matrix 12, a lens 13, a light filter 14. Depending on the type of surface being monitored, the optical meter 1 can be represented by optoelectronic surface profile sensors or shadow two-dimensional sensors.

The control unit 5 is configured to receive data about the object of control from an external node of computer technology 6. The received data, in particular, may include:

- table of tolerances for the measured parameters;

- size / diameter of the threaded connection;

- flag for measuring the alignment of the coupling;

- mask of separate measurement for the control of shaped products.

In FIG. 2 shows an image of a device for monitoring the geometric parameters of the surface of a product.

The movable mechanical module is mounted on the supporting plane 15, the role of which is played by an optical table made according to the principle of a cellular structure. This table provides sufficient flatness, allows you to set the necessary mechanisms and components using the base holes, and also allows you to perform additional holes without the application of significant effort.

The movable mechanical module consists of a frame 16, a vertical displacement assembly 17, a platform 18, and an eccentricity assembly 19. The frame 16 is mounted on a supporting plane 16, and is arranged to move horizontally relative to the reference plane in the rails 20. A vertical displacement assembly 17 is mounted on the frame 16. To carry out the movement of movable elements, either linear motors or a drive consisting of a ball screw pair and a motor (servomotor or stepper motor) can be used. The device also uses precision guides that exclude axial backlash when moving. Feedback on the magnitude of the movement of moving elements is carried out using motion sensors, which can be represented by encoders or magnetic-striction sensors. Also, to move the frame 16, a circuit with two linear ball bearings located at the edges and a ball screw pair, which is preferably located in the center of the supporting surface 15, are used.

The platform 18 can be performed on a single bearing, the outer ring of which is mounted on the vertical displacement assembly 17, and the eccentricity assembly 19 is located on the inner ring. The bearing consists of a thrust / radial seat ring, a thrust / radial shaft ring, a thrust washer, two pre-assembled needle clips rollers and groups of coaxial cylindrical rollers. The seat ring and shaft ring have machined, evenly distributed holes and screws. The specified bearing has a high load capacity in the axial and radial direction, high bending stiffness and high accuracy. The platform 18 is equipped with a pulley 21 for a belt drive. An engine with a drive pulley and a tensioner pulley is mounted on the drive part. V-ribbed belts 22 are used having high reliability. Additionally, the platform is equipped with an incremental feedback sensor.

The eccentricity unit 19 is made on a special carrier plate, which is mounted on the inner ring of the bearing of the platform 18 and the movable plate. The movement of the movable plate is provided by transmitting torque from the stepper motor to the gear wheel, which is engaged with the gear rack. The tooth arrangement is made at an angle of 45 degrees, which minimizes possible backlashes. The movable plate is based on a pair of rails with preloaded ball carriages. Additionally, a special brake is installed on the mechanism, which is controlled by an electromagnetic mechanism. The brake eliminates all possible movements of the movable plate relative to the carrier during rotation.

The console 23 is attached to the movable plate of the eccentricity assembly by means of an end coupling. This node is the most responsible in the system. The console has high demands on bending and thermal expansion. The console consists of two carbon fiber pipes made in the form of a coaxial glued structure. One pipe is concentric in the other pipe. Pipes are fixed to each other by end fasteners with glue. On the other hand, an optical meter 1 with a microdisplacement unit 24 is attached to the coaxial structure. Carbon-plastic pipes are pipes made of a polymer composite material of interwoven carbon fiber strands located in a matrix of polymer resins. The material is characterized by high strength, rigidity and low weight, much stronger than steel, but much lighter. Given the length of the console, the limited operating temperature range and the required accuracy, we can conclude that the console will give an error tending to zero.

The microdisplacement unit 24 of the optical meter provides an extension of the working range of the sensor and compensates for the inherent taper of the pipe thread surface. The unit is located on the free end of the coaxial pipe structure, consists of two microrails with cross-type sliders, a precision motor with a gearbox, and an encoder incremental encoder, the output of which is connected directly to optical meter 1. Data from the encoder are combined with the output signals of optical meter 1 in real time by means of the control unit 5. The unit of micromotion 24 during operation of the device is constantly in a pre-loaded state, and therefore is performed more accurately than with posing a mechanical movable module. The weight carried by the assembly 24 (the weight of the optical meter) is incomparably less than the weight of the entire console. These design solutions make it possible to keep possible backlash at the level of 1 micron.

The device operates as follows. The cycle of setting the device for the pipe size consists in obtaining the pipe diameter from the ACS system of the workshop. Next, the control unit 6 calculates the desired position of the axis of rotation of the console 23 and the size of the eccentricity. The mechanical movable module goes into a preliminary position. The required eccentricity is set. The brake mechanism engages. The optical meter 1 moves to the end of the pipe, when the pipe is located, it makes one revolution, determines the discrepancy in the X and Y coordinates and gives the command to adjust the spatial position. The result of this operation is the exact coaxial position of the pipe and device.

After this operation, the main measurement cycle begins. Moreover, the device provides simultaneous movement of the optical meter deep into the pipe and its rotation. The rotation step and the movement step are selected so that the scanning takes place in a spiral, with each next step capturing a part of the surface scanned during the previous rotation. The engines are controlled using the software installed on the control unit 5. Therefore, if 100% control of the thread surface is not required, the device can be switched to another scanning mode: with a large rotation step or to the mode of measuring over sections.

The result of the operation of the device is to obtain a cloud of points of the controlled surface of the product in absolute coordinates with the required metrological characteristics.

The primary metrological information is the output signals of the optical meter 1, which transmit to the control unit 6 an instantaneous surface profile that is in the working range of the optical meter 1. Additional information (information about the spatial position of the meter 1 relative to the zero coordinate system of the device) comes from encoders that are installed on all moving nodes of the mechanical movable module.

After the control, the control unit 5 transmits to the external node of the computing equipment 6, in particular, the following data:

- results of measuring the geometric parameters of the surface of the product;

- a table of tolerance control of thread parameters containing

- Flags "expiration / reject" for each thread parameter;

- an array of points of measured sections;

- flag of the presence of chipped threads;

- a table of the results of measuring the inner diameter;

- a table of the results of measuring the external diameter in characteristic sections;

- the result of measuring the wall thickness with a tolerance flag;

- a table of flags of the access control calibration of the measuring channels of the stand;

- a signal of the results of the self-monitoring of the measuring system.

Thus, the use of this utility model for monitoring the geometric parameters of the surface of the product allows you to compensate for errors that occur due to operating conditions and the actual design (including possible defects) of the product, which is the object of control. This solves the problem of increasing the reliability of control when measuring geometric parameters of the surface of the product.

Claims (5)

1. A device for monitoring the geometric parameters of the surface of the product containing an optical meter mounted on a support, a mechanical movable module that is configured to change the spatial position of the support with an optical meter, a control unit configured to synchronize output signals and the spatial position of the optical meter and with data exchange with an external computer node, characterized in that the mechanical movable module is additionally equipped the eccentricity unit, the support is represented by a carbon-fiber console mounted on the eccentricity unit and equipped with a microdisplacement unit of the optical meter. 2. The device according to claim 1, characterized in that the optical meter can be represented by a two-dimensional optoelectronic sensor. 3. The device according to claim 1, characterized in that the micro-displacement unit of the optical meter is equipped with a displacement sensor provided by an encoder. 4. The device according to claim 1, characterized in that the mechanical movable module is represented by a frame made with the possibility of horizontal movement on a supporting plane, a vertical movement unit that is mounted on the said frame, a platform made with rotation and mounted on the vertical movement unit. 5. The device according to claim 1, characterized in that the mechanical movable module is equipped with displacement sensors provided by encoders and installed on each node, which is made with the possibility of movement or rotation.

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