CN117207070B - Automatic grinding wheel dressing method based on numerical control machine tool - Google Patents
Automatic grinding wheel dressing method based on numerical control machine tool Download PDFInfo
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Abstract
The invention discloses an automatic grinding wheel dressing method based on a numerical control machine tool, which comprises the steps of setting grinding wheel dressing parameters, setting the rotating speed of a grinding wheel dresser roller and the rotating speed of the grinding wheel; the numerical control system controls the roller of the grinding wheel dresser to dress the grinding wheel according to the grinding wheel dressing parameters, and the dressing is stopped after the total grinding wheel radius dressing amount or the maximum dressing times are reached; then acquiring parameters after grinding wheel dressing, measuring the dressed grinding wheel by a grinding wheel measuring device, acquiring the parameters after grinding wheel dressing, and storing the parameters after grinding wheel dressing into a numerical control system; and then determining the compensation quantity, and then calculating the number of times of re-dressing by the numerical control system according to the compensation quantity and the grinding wheel dressing parameters, so as to finish the final dressing of the grinding wheel. The method can finish automatic dressing of the grinding wheel, perform online detection and compensation, and reduce the artificial fatigue strength.
Description
Technical Field
The invention belongs to the field of machine tools, and particularly relates to an automatic grinding wheel dressing method based on a numerical control machine tool.
Background
The numerical control jig grinding machine is a machine tool that performs grinding using a grinding wheel. Grinding machines have long machining times and grinding wheels wear frequently, so that frequent dressing of the grinding wheels is required. The existing grinding wheel dressing is often also manual dressing, manually measuring the radius and length of the grinding wheel, and manually compensating in the grinding process; the grinding wheel dressing and manual compensation rely on manual experience, and are time-consuming and labor-consuming.
Therefore, in order to solve the above-mentioned problems, it is necessary to provide an automatic grinding wheel dressing and online measuring method.
Disclosure of Invention
The invention aims at: aiming at the problems, the automatic grinding wheel dressing method based on the numerical control machine tool is provided, and can finish automatic grinding wheel dressing, online detection and compensation and reduce the manual fatigue strength.
The technical scheme adopted by the invention is as follows:
An automatic grinding wheel dressing method based on a numerical control machine tool is characterized in that: the method comprises the following steps:
setting grinding wheel dressing parameters: setting grinding wheel dressing parameters in a numerical control system according to a grinding wheel to be dressed, wherein the grinding wheel dressing parameters comprise a grinding wheel dressing front radius, a grinding wheel dressing roller radius, a grinding wheel radius dressing total amount, a speed of positioning the grinding wheel to a grinding wheel dressing device and a feeding speed during grinding wheel dressing;
setting the rotating speed of a roller of the grinding wheel dresser and the rotating speed of the roller;
Dressing a grinding wheel: the numerical control system controls the roller of the grinding wheel dresser to dress the grinding wheel according to the grinding wheel dressing parameters, and the dressing is stopped after the total grinding wheel radius dressing amount or the maximum dressing times are reached;
Obtaining parameters after finishing the grinding wheel: measuring the trimmed grinding wheel through a grinding wheel measuring device to obtain parameters after grinding wheel trimming, and storing the parameters after grinding wheel trimming into a numerical control system; the parameters after grinding wheel dressing comprise the radius after grinding wheel dressing and the length after grinding wheel dressing;
determining a compensation amount: the compensation quantity comprises a radius compensation quantity and a length compensation quantity;
The radius compensation amount is determined according to the difference value between the final radius of the grinding wheel and the radius after the grinding wheel is trimmed, and the final radius of the grinding wheel = the radius before the grinding wheel is trimmed-the total radius of the grinding wheel;
the length compensation quantity is determined according to the difference value between the length before the grinding wheel is trimmed and the length after the grinding wheel is trimmed;
And (5) reconditioning the grinding wheel: and the numerical control system calculates the number of times of re-dressing according to the radius compensation quantity, the length compensation quantity and the grinding wheel dressing parameter, and finishes the final dressing of the grinding wheel.
Furthermore, before dressing the grinding wheel, the dressing times and the compensation amount need to be cleared.
Further, the maximum dressing times = total grinding wheel radius dressing amount/single radius dressing amount; the single radius trimming amount is less than or equal to 0.05mm.
Further, the grinding wheel dressing process comprises arc dressing and straight line dressing; in the linear dressing process, the roller of the grinding wheel dresser and the grinding wheel linearly and relatively move to dress the side surface of the grinding wheel; in the arc dressing process, the roller of the grinding wheel dresser moves relative to the grinding wheel in an arc manner and is used for dressing the corners of the side surface of the grinding wheel and the end surface of the grinding wheel.
Further, during grinding wheel dressing, the grinding wheel is firstly subjected to linear dressing, and then the grinding wheel is subjected to arc dressing.
Further, when the straight line is trimmed, trimming is required to be performed for a plurality of times, and each trimming amount is equal to a single radius trimming amount; when the arc is trimmed, trimming is performed only once, and the trimming amount is 1.5mm.
Further, the grinding wheel measuring device is an AE sensor.
Further, when the radius of the grinding wheel after finishing is obtained, the grinding wheel automatically moves to the position of the grinding wheel measuring device, the AE sensor collects different side point position signals on different sides of the grinding wheel for a plurality of times, and the radius of the grinding wheel after finishing is calculated according to the different side point position signals.
Further, when the length of the grinding wheel after finishing is obtained, the grinding wheel automatically moves to the position of the grinding wheel measuring device, the AE sensor collects different end face point position signals at the position, close to the edge of the grinding wheel, of the end face of the grinding wheel for a plurality of times, and the length of the grinding wheel after finishing is calculated according to the different end face point position signals.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
1. the method of the invention has simple operation and less manual participation, and realizes the full-automatic flow of automatic dressing, online detection and automatic compensation of the grinding wheel.
2. The AE sensor is adopted for detection, so that the precision is higher, the stability is better, and the application range is wider.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without collision.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, or are directions or positional relationships conventionally understood by those skilled in the art, are merely for convenience of describing the present invention and for simplifying the description, and are not to indicate or imply that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The invention discloses an automatic grinding wheel dressing method based on a numerical control machine tool, which comprises the following steps:
Step 1, setting grinding wheel dressing parameters: setting grinding wheel dressing parameters in a numerical control system according to a grinding wheel to be dressed, wherein the grinding wheel dressing parameters comprise a grinding wheel dressing front radius, a grinding wheel dressing roller radius, a grinding wheel radius dressing total amount, a speed of positioning the grinding wheel to a grinding wheel dressing device and a feeding speed during grinding wheel dressing;
Step2, setting or adjusting the roller rotating speed and the roller rotating speed of the grinding wheel dresser by using a speed regulator on an operation panel;
Step 3, initializing: zero resetting, finishing times and compensation quantity are carried out on each coordinate of the machine tool;
Step 4, grinding wheel dressing: the numerical control system controls the roller of the grinding wheel dresser to dress the grinding wheel according to the grinding wheel dressing parameters, and the dressing is stopped after the total grinding wheel radius dressing amount or the maximum dressing times are reached; the maximum dressing times = grinding wheel radius dressing total amount/single radius dressing amount; the single radius trimming amount is less than or equal to 0.05mm, single trimming is carried out within the range of less than or equal to 0.05mm, and the trimming quality is best;
Step 5, acquiring parameters after grinding wheel dressing: measuring the trimmed grinding wheel through a grinding wheel measuring device to obtain parameters after grinding wheel trimming, and storing the parameters after grinding wheel trimming into a numerical control system; the parameters after grinding wheel dressing comprise the radius after grinding wheel dressing and the length after grinding wheel dressing;
Step 6, determining the compensation amount: the compensation quantity comprises a radius compensation quantity and a length compensation quantity;
The radius compensation amount is determined according to the difference value between the final radius of the grinding wheel and the radius after the grinding wheel is trimmed, and the final radius of the grinding wheel = the radius before the grinding wheel is trimmed-the total radius of the grinding wheel;
the length compensation quantity is determined according to the difference value between the length before the grinding wheel is trimmed and the length after the grinding wheel is trimmed;
step 7, grinding wheel reconditioning: and the numerical control system calculates the number of times of re-dressing according to the radius compensation quantity, the length compensation quantity and the grinding wheel dressing parameter, and finishes the final dressing of the grinding wheel.
Due to the steps, the method disclosed by the invention is based on a numerical control system, can realize automatic trimming, online detection and automatic compensation of the grinding wheel, is convenient for quick trimming of the grinding wheel, ensures the trimming precision, and can reduce the manual fatigue strength.
In the dressing process of the grinding wheel, the radius of the grinding wheel is mainly dressed, but in the actual dressing process, the edges of two end faces of the grinding wheel are worn, the length of a main working face of the grinding wheel is changed, and in order to avoid the change of the length of the grinding wheel, the dressing of the subsequent grinding wheel or the processing of parts is influenced; therefore, the invention collects the length of the grinding wheel after trimming, and obtains the length compensation value according to the difference value between the length of the grinding wheel before trimming and the length of the grinding wheel after trimming, so as to carry out subsequent grinding wheel trimming or part processing according to the length compensation value, thereby ensuring trimming quality.
In the present invention, the wheel dresser includes a dressing motor and a wheel dresser roller. The grinding wheel dresser roller is arranged on a rotating shaft of the dressing motor and is driven to rotate by the dressing motor.
Further, the grinding wheel dressing process comprises arc dressing and straight line dressing; in the linear dressing process, the roller of the grinding wheel dresser and the grinding wheel linearly and relatively move to dress the side surface of the grinding wheel; in the arc dressing process, the roller of the grinding wheel dresser moves relative to the grinding wheel in an arc manner and is used for dressing the corners of the side surface of the grinding wheel and the end surface of the grinding wheel. When the grinding wheel is trimmed, the grinding wheel is trimmed linearly, and then the grinding wheel is trimmed in an arc mode. When the straight line is trimmed, trimming is needed for a plurality of times, and each trimming amount is equal to a single radius trimming amount; when the arc is trimmed, trimming is performed only once, and the trimming amount is 1.5mm.
In the dressing process, the straight line dressing mainly carries out dressing on the radius, and multiple dressing is adopted, so that the dressing quality can be ensured, the abrasion in the dressing process can be repaired by arc dressing, and the dressing quality of the grinding wheel is further improved.
Further, the grinding wheel measuring device is an AE sensor. The AE sensor is a hair generation sensor, and the measuring effect of the sensor in the grinding wheel dressing process is higher in measuring precision, better in stability and wider in application range compared with that of the infrared sensor. The method for measuring the diameter and the length of the grinding wheel by the AE sensor is a method for measuring noise by the AE sensor, setting a noise range used for the equipment on an AE control panel, converting the noise range into a logic output signal by an AE controller and outputting the logic output signal to a numerical control system.
Further, when the radius of the grinding wheel after finishing is obtained, the grinding wheel automatically moves to the position of the grinding wheel measuring device, the AE sensor collects different side point position signals on different sides of the grinding wheel for a plurality of times, and the radius of the grinding wheel after finishing is calculated according to the different side point position signals.
Further, when the length of the grinding wheel after finishing is obtained, the grinding wheel automatically moves to the position of the grinding wheel measuring device, the AE sensor collects different end face point position signals at the position, close to the edge of the grinding wheel, of the end face of the grinding wheel for a plurality of times, and the length of the grinding wheel after finishing is calculated according to the different end face point position signals.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (6)
1. An automatic grinding wheel dressing method based on a numerical control machine tool is characterized in that: the method comprises the following steps:
setting grinding wheel dressing parameters: setting grinding wheel dressing parameters in a numerical control system according to a grinding wheel to be dressed, wherein the grinding wheel dressing parameters comprise a grinding wheel dressing front radius, a grinding wheel dressing roller radius, a grinding wheel radius dressing total amount, a speed of positioning the grinding wheel to a grinding wheel dressing device and a feeding speed during grinding wheel dressing;
setting the rotating speed of a roller of the grinding wheel dresser and the rotating speed of the roller;
Dressing a grinding wheel: the numerical control system controls the roller of the grinding wheel dresser to dress the grinding wheel according to the grinding wheel dressing parameters, and the dressing is stopped after the total grinding wheel radius dressing amount or the maximum dressing times are reached;
Obtaining parameters after finishing the grinding wheel: measuring the trimmed grinding wheel through a grinding wheel measuring device to obtain parameters after grinding wheel trimming, and storing the parameters after grinding wheel trimming into a numerical control system; the parameters after grinding wheel dressing comprise the radius after grinding wheel dressing and the length after grinding wheel dressing;
determining a compensation amount: the compensation quantity comprises a radius compensation quantity and a length compensation quantity;
The radius compensation amount is determined according to the difference value between the final radius of the grinding wheel and the radius after the grinding wheel is trimmed, and the final radius of the grinding wheel = the radius before the grinding wheel is trimmed-the total radius of the grinding wheel;
the length compensation quantity is determined according to the difference value between the length before the grinding wheel is trimmed and the length after the grinding wheel is trimmed;
and (5) reconditioning the grinding wheel: the numerical control system calculates the number of times of re-dressing according to the radius compensation quantity, the length compensation quantity and the grinding wheel dressing parameter, and finishes the final dressing of the grinding wheel;
The grinding wheel measuring device is an AE sensor;
When the radius of the grinding wheel after finishing is obtained, the grinding wheel automatically moves to the position of a grinding wheel measuring device, an AE sensor acquires different side point position signals on different sides of the grinding wheel for a plurality of times, and the radius of the grinding wheel after finishing is calculated according to the different side point position signals;
When the length of the grinding wheel after finishing is obtained, the grinding wheel automatically moves to the position of a grinding wheel measuring device, AE sensors collect different end face point position signals at the position, close to the edge of the grinding wheel, of the end face of the grinding wheel for multiple times, and the length of the grinding wheel after finishing is calculated according to the different end face point position signals.
2. The automatic dressing method for grinding wheel based on numerical control machine according to claim 1, characterized in that: before dressing the grinding wheel, the dressing times and the compensation amount need to be cleared.
3. The automatic dressing method for grinding wheel based on numerical control machine according to claim 1, characterized in that: the maximum dressing times = grinding wheel radius dressing total amount/single radius dressing amount; the single radius trimming amount is less than or equal to 0.05mm.
4. The automatic grinding wheel dressing method based on the numerical control machine tool according to claim 3, wherein: the grinding wheel dressing process comprises arc dressing and straight line dressing; in the linear dressing process, the roller of the grinding wheel dresser and the grinding wheel linearly and relatively move to dress the side surface of the grinding wheel; in the arc dressing process, the roller of the grinding wheel dresser moves relative to the grinding wheel in an arc manner and is used for dressing the corners of the side surface of the grinding wheel and the end surface of the grinding wheel.
5. The automatic grinding wheel dressing method based on the numerical control machine tool according to claim 4, wherein: when the grinding wheel is trimmed, the grinding wheel is trimmed linearly, and then the grinding wheel is trimmed in an arc mode.
6. The automatic grinding wheel dressing method based on the numerical control machine tool according to claim 5, wherein: when the straight line is trimmed, trimming is needed for a plurality of times, and each trimming amount is equal to a single radius trimming amount; when the arc is trimmed, trimming is performed only once, and the trimming amount is 1.5mm.
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