CN209868137U - An in-situ measuring device for roll diameter and taper based on roll grinder - Google Patents

Abstract

The utility model discloses a roll diameter and tapering measuring device on throne based on roll grinder, this measuring device can increase the dress on the grinding machine wheel carrier, folds at ordinary times, does not interfere and influences normal grinding process, and this measuring device mainly comprises one-dimensional precision workbench, measurement bow, laser displacement sensor and size calibration pole. When the device is used, the measuring bow is opened, the device moves to the measured size along with the grinding carriage to complete the measurement of the related size, and the roll taper is calculated. The utility model belongs to non-contact, jumbo size, high accuracy are at the position and are measured, have effectively realized the real time monitoring of machining size in the roll grinding, especially when last feed, can provide accurate cutting depth value. The device is simple and reliable.

Description

An in-situ measuring device for roll diameter and taper based on roll grinder

technical field

The utility model belongs to the technical field of roll grinders, in particular to an in-position measuring device for roll diameter and taper based on roll grinders.

Background technique

Roll is an important technical equipment in the fields of papermaking, cement, steel and other manufacturing industries. It is easy to go out of tolerance when precision grinding its outer circle and conical surface. The conical surface is the bearing mounting surface. The traditional roll grinder is not equipped with a measuring system. After each feed, it is necessary to manually measure the size of the processed roll with a large micrometer, so as to determine the cutting depth of the next tool pass. This method is greatly affected by the subjective factors of the measurer. , the measurement accuracy is low, and the accurate measurement of the taper of the cone surface on the roll cannot be realized.

The utility model patent specification whose notification number is CN2709930 discloses a portable high-precision intelligent roll shape measuring instrument, which is equipped with a cylindrical guide rail on the measuring seat of the saddle car, and the sliding arm can move on the guide rail. At the antidiametric position between the sliding measuring arm and the roll, the front and rear are respectively equipped with a diameter measuring sensor mechanism and a gravity hammer to ensure that the end of the heavy hammer of the instrument is always in contact with the surface of the roll. The instrument can move along the axis of the roller body. The pulse length measuring mechanism on the measuring arm can measure the movement of the measuring arm along the axis of the roller. At the same time, the sensor on the diameter measuring mechanism can measure the change of the roller diameter. However, the measuring device contacts the roll to be tested at multiple points, which may scratch the surface of the roll; the non-vertical state of the measuring arm body, the gap between the measuring arm and the guide rail carriage, etc. will cause the actual measured value to be different from the roll diameter value, resulting in error.

The non-contact roll measurement system abroad includes the ultrasonic roll rangefinder developed by Japan's Mitsubishi Heavy Industries. The principle is to arrange a plurality of ultrasonic range finders along the axial direction of the roll, and reflect the roll shape by measuring the distance between the roll surface and the sensor. In order to make the medium between the roller surface and the sensor uniform and improve the detection accuracy, water spray is often used. The method for measuring the roll shape of the ultrasonic detection roll is free from ambient light and electromagnetic interference, has a large working gap, and has certain adaptability to harsh environments. However, its measurement accuracy is limited, and it is greatly disturbed by factors such as sound velocity, air bubbles in water, and water flow, and its anti-interference ability is poor.

Utility model content

The purpose of this utility model is to provide an on-site measuring device for roll diameter and taper based on a roll grinder, so as to avoid possible damage to the roll surface caused by contact measurement, increase the anti-interference ability of the measurement, and improve the measurement accuracy.

The purpose of this utility model can be realized through the following technical solutions:

An in-situ measuring device for roll diameter and taper based on a roll grinder, comprising a roll grinder, a linear guide rail, a workbench and a measuring bow, the linear guide rail being fixed on the surface of the grinding wheel frame;

The Y-axis guide rail is fixed on the surface of the roll grinder, and the grinding wheel slider is slidably installed. The X-axis guide rail is fixed on the surface of the grinding wheel slider, and the grinding wheel frame is slidably installed on the surface of the grinding wheel slider. ;

The surface of the roll grinder is vertically fixed with a support platform, and a roll workpiece to be measured is fixed between the two opposite support platforms through the main shaft of the roll grinder;

A square support platform is vertically fixed on the surface of the linear guide rail, and a screw rod is installed through the surface of the square support platform, and one end of the screw rod is connected to the stepping motor through a coupling;

A workbench is slidably installed on the surface of the linear guide rail, a slider is fixed on one surface of the workbench, the slider is slidably connected to the linear guide rail, and a hinge is fixed on the other surface;

A locating pin is vertically fixed on the outer surface of the measuring arch, and the locating pin is hingedly connected with the hinge;

A support hole is opened on the inner surface of the circumference of the measuring arch, and a sensor is fixed on the end surface.

Further, the grinding wheel slider is slidably connected to the Y-axis guide rail, and the side surface of the grinding wheel frame is slidably connected to the X-axis guide rail.

Further, two square support platforms are oppositely arranged on the surface of the linear guide rail.

Further, the linear guide rail includes a support plate and two parallel guide rails vertically fixed on the surface of the support plate.

Further, the sensor is a laser displacement sensor, and two sensors are fixed on opposite ends of the measuring bow.

Further, a method for measuring roll diameter and taper in situ based on a roll grinder, is characterized in that it comprises the following steps:

S1. Calibrate the distance between the two sensors with a standard rod of length n, and obtain the distance calibration value L between the two laser displacement sensors: L=a+n+b, where a and b are two The measurement of the sensor against the rod end of the par;

S2, detect the roll to be tested with the sensor, obtain the measured values of the diameter position of the roll to be tested by the two sensors as a1 and b1 respectively, calculate the diameter D of the roll to be tested as: D=L-a1-b1;

S3, move the grinding wheel frame along the Y-axis guide rail, and record the displacement X, respectively record the detection diameters D1 and D2 of the two sensors at the two ends of the grinding wheel frame for the roll to be tested, and calculate the taper C as C=(D1- D2)/X.

Further, for the measured section of the roll to be measured, move the grinding wheel frame along the X-axis guide rail, and determine the minimum values of the measured values of the two sensors, namely a1 and b1.

Further, the displacement is obtained according to the number of input pulses of the stepping motor and the pitch value of the screw.

The beneficial effects of the utility model:

1. Compared with the contact type roll shaper, the utility model realizes scaleless and non-contact measurement, avoiding possible damage to the roll surface caused by contact measurement;

2. The main structure of the measurement system in the utility model can be folded and put away, and the limited space on the machine tool can be cleverly used for installation without interfering with or affecting the normal cutting of the machine tool;

3. The utility model adopts the laser displacement sensor based on the triangulation method, which is configured in pairs and differentially measured, which basically eliminates the influence of workpiece eccentricity, bench deformation and other structures and assembly errors on the measurement results, and ensures the measurement accuracy;

4. During the measurement of the utility model, the grinding wheel frame drives the measuring bow to move radially to find the "inflection point", which can automatically and accurately identify the diameter of the shaft and complete accurate measurement;

5. The utility model has the advantages of simple structure, low cost, easy installation, simple operation, and easy implementation by enterprises.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a top view of the grinding position of the utility model.

Fig. 3 is a schematic diagram of the installation structure of the utility model.

Fig. 4 is a schematic diagram of calibration of the utility model.

Fig. 5 is a schematic diagram of the roll diameter measurement of the utility model.

Fig. 6 is a principle diagram of measuring roll taper of the utility model.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

A roll diameter and taper in-situ measuring device based on a roll grinder, comprising a linear guide rail 1, a workbench 2 and a measuring bow 9, the linear guide rail 1 is fixed on the surface of a grinding wheel frame 15, as shown in Figures 1 and 2;

It should be noted that a Y-axis guide rail is fixed on the surface of the roll grinding machine 12, and a grinding wheel slider 19 is slidably installed on the surface of the grinding wheel slider 19. An X-axis guide rail is fixed on the surface of the grinding wheel slider 19. Grinding wheel 16 is installed movablely on the end face of frame 15, as shown in Figure 3;

Preferably, the grinding wheel slider 19 is slidably connected to the Y-axis guide rail, and the side surface of the grinding wheel frame 15 is slidably connected to the X-axis guide rail;

Preferably, the Y-axis guide rail and the X-axis guide rail are vertically distributed;

It should be noted that a support platform is vertically fixed on the surface of the roll grinder 12, and a roll workpiece 14 to be tested is fixed between two opposite support platforms through the roll grinder spindle 13;

The surface of the linear guide rail 1 is vertically fixed with a square support platform 18, and the surface of the square support platform 18 is installed with a screw mandrel 5, and one end of the screw mandrel 5 is connected with the stepping motor 7 through a coupling 6;

Specifically, two square support platforms 18 are arranged on the surface of the linear guide rail 1 opposite to each other;

Specifically, the linear guide rail 1 includes a support plate and two parallel guide rails vertically fixed on the surface of the support plate;

It should be noted that the stepper motor 7 drives the mobile worktable 2 to move horizontally along the linear guide rail 1 through the screw rod 5;

The surface of the linear guide rail 1 is slidingly installed with a workbench 2. The workbench 2 is a square plate. A slider 4 is fixed on one surface of the workbench 2. The slider 4 is slidably connected with the linear guide rail 1, and a hinge 3 is fixed on the other surface. ;

A positioning pin 11 is vertically fixed on the outer surface of the peripheral side of the measuring bow 9, and the positioning pin 11 is hingedly connected with the hinge 3;

It should be noted that the measuring bow 9 has two different state positions through the hinged connection of the positioning pin 11 and the hinge 3, which are respectively the measuring position and the grinding position. The cross-section of the roll workpiece 14 to be measured; the grinding position is in the grinding state, and the plane of the measuring bow 9 is parallel to the moving plane of the mobile workbench 2;

It should be noted that the measuring bow 9 together with the sensor 8 can rotate 90° around the hinge 3. During the normal grinding process, the measuring bow 9 is folded and closed, and the grinding process stops. When the workpiece is to be measured, the measuring bow 9 is opened. And use the positioning pin 11 to lock it at the measurement position, and at the same time, the grinding wheel frame 15 moves to drive the measurement bow 9 to the surface of the roll workpiece 14 to be measured to complete the measurement;

Preferably, the cross-section of the measuring bow 9 is a semi-circular ring, and circular through holes are evenly distributed on the surface;

A support hole 10 is opened on the inner surface of the measuring bow 9, and a sensor 8 is fixed on the end surface;

Specifically, the sensor 8 is a laser displacement sensor, and two sensors 8 are fixed on opposite ends of the measuring bow 9;

It should be noted that the laser displacement sensor forms a differential measurement of the roll workpiece 14 to be tested. The two laser displacement sensors are based on the principle of triangulation and use differential readings to perform non-contact high-precision measurement. Error factors such as the installation eccentricity of the measured piece do not affect measurement results;

It should be noted that the laser displacement sensor can realize non-contact long-distance measurement, fast speed, high precision, large range, strong resistance to light and electrical interference, and the laser displacement sensor can be divided into laser triangulation and laser echo analysis according to the principle The method is used to measure the roll diameter and taper at the roll grinding site, which is a high-precision, short-distance measurement. The laser displacement sensor of the laser triangulation method is selected. The two sensors use differential readings for non-contact high-precision measurement. Error factors such as installation eccentricity and measurement bow force deformation do not affect the measurement results;

As shown in Figure 4-6, an in-situ measurement method for roll diameter and taper based on a roll grinder includes the following steps:

S1. Calibrate the distance between the two sensors 8 with a standard rod 17 whose length is n, and obtain the distance calibration value L between the two laser displacement sensors 8 as: L=a+n+b, a and b respectively is the measured value of the two sensors 8 for the rod end of the standard rod 17;

It should be noted that the diameter measurement method is a relative measurement. Before the measurement, a standard rod 17 is used for calibration. The distance n between the two ends of the standard rod 17 is known. The standard rod 17 is a quartz rod with a small thermal expansion coefficient. The measured value of the sensor and the standard rod The standard value is compared to obtain the diameter of the roll workpiece;

S2. Use the sensor 8 to detect the roll to be tested, and obtain the measured values of the diameter position of the roll to be tested by two sensors 8 as a1 and b1 respectively, and calculate the diameter D of the roll to be tested as: D=L-a1-b1;

Specifically, for the measured section of the roll to be measured, move the grinding wheel frame 15 along the X-axis guide rail, and determine the minimum values of the measured values of the two sensors 8, which are a1 and b1;

S3. Move the grinding wheel frame 15 along the Y-axis guide rail, and record the displacement X, respectively record the detection diameters D1 and D2 of the two sensors 8 at the two ends of the grinding wheel frame 15 for the roll 14 to be tested, and calculate the taper C as C =(D1-D2)/X;

Specifically, the displacement is obtained according to the number of pulses input by the stepping motor 7 and the pitch value of the screw mandrel 5;

It should be noted that if the processing accuracy is high, a long grating can be installed on the one-dimensional precision displacement stage for measurement, so as to obtain the movement amount more accurately;

A specific implementation of this embodiment includes the following steps:

Before the measurement starts, the standard rod 17 is installed in the support hole 10, and the standard rod 17 with a length of n is used to calibrate the distance between the two sensors 8; a is the measured value of the distance from the left sensor 8 to the left end surface of the standard rod 17 , b is the measured value of the distance from the right sensor 8 to the right end face of the standard rod 17; the distance calibration value L obtained between the two sensors 8 is: L=a+n+b, and the standard rod 17 is taken off after the calibration is completed, There is no need to calibrate before each measurement. In actual use, only regular calibration is required;

During measurement, the measuring bow 9 should be rotated to be perpendicular to the roll workpiece 14 to be measured by the hinge 3 for measurement;

The grinding wheel frame 15 drives the measuring bow 9 to move slowly along the radial direction of the roll to find the "inflection point" of the diameter. At this time, the laser displacement sensor 8 continuously reads the indications a and b. When the minimum value appears, the computer stores the reading as the measurement data, then The diameter of the roll workpiece 14 to be tested is recorded as: D=L-a1-b1, and the computer sends out a prompt at the same time, and the operator stops the lateral feed of the grinding wheel frame;

When performing taper measurement, after measuring the diameter D1 at position A, the stepping motor 7 drives the table 2 to move horizontally to the position B along the axial direction to obtain the diameter D2, combined with the input pulse of the stepping motor 7 and the pitch of the screw rod 5 , the displacement X of the measuring bow 9 can be obtained, then the taper of the roll workpiece 14 to be measured is recorded as C: C=(D1-D2)/X;

After the measurement is completed, the measuring bow 9 is put away parallel to the grinding wheel frame 15 and locked by the pin bolt 11 to prevent accidents caused by the loosening of the measuring bow in the cutting of the machine tool.

In the description of this specification, descriptions referring to the terms "one embodiment", "example", "specific example" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in the description of the present invention. In at least one embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above content is only an example and description of the structure of the utility model. Those skilled in the art make various modifications or supplements to the described specific embodiments or replace them in similar ways, as long as they do not deviate from the utility model. Structures or beyond the scope defined in the claims shall belong to the protection scope of the present utility model.

Claims (5)

1. a roll diameter and taper in-situ measuring device based on roll grinder, comprising roll grinder (12), is characterized in that, also comprises linear guideway (1), workbench (2) and measuring bow (9), described The linear guide rail (1) is fixed on the surface of the grinding wheel frame (15); The Y-axis guide rail is fixed on the surface of the roll grinder (12), and a grinding wheel slider (19) is slidably installed on the surface. A grinding wheel frame (15), the end face of the grinding wheel frame (15) is movably equipped with a grinding wheel (16); The surface of the roll grinder (12) is vertically fixed with a support platform, and a roll workpiece (14) to be measured is fixed between two opposite support platforms by the roll grinder main shaft (13); The surface of the linear guide (1) is vertically fixed with a square support platform (18), the surface of the square support platform (18) is penetrated with a screw mandrel (5), and one end of the screw mandrel (5) passes through a shaft coupling ( 6) Connect with the stepper motor (7); A workbench (2) is slidably installed on the surface of the linear guide rail (1), and a slider (4) is fixed on one surface of the workbench (2), and the slider (4) is slidably connected with the linear guide rail (1), The other surface is fixed with a hinge (3); A positioning pin (11) is vertically fixed on the outer surface of the circumference of the measuring bow (9), and the positioning pin (11) is hingedly connected with the hinge (3); A support hole (10) is opened on the peripheral inner surface of the measuring bow (9), and a sensor (8) is fixed on the end surface. 2. A roll diameter and taper in-situ measuring device based on a roll grinder according to claim 1, characterized in that: the grinding wheel slider (19) is slidingly connected to the Y-axis guide rail, and the grinding wheel stand (15) The side surface is slidingly connected with the X-axis guide rail. 3. An in-situ measuring device for roll diameter and taper based on a roll grinder according to claim 1, characterized in that two square support platforms (18) are arranged opposite to each other on the surface of the linear guide rail (1). 4. A roll diameter and taper in-situ measuring device based on a roll grinder according to claim 1, characterized in that: the linear guide rail (1) includes a support plate and two parallel bars vertically fixed on the surface of the support plate guide. 5. A roll diameter and taper in-situ measuring device based on a roll grinder according to claim 1, characterized in that: the sensor (8) is a laser displacement sensor, and the measuring bow (9) is fixed with two sensors (8).