CN116922155B - Secondary tool setting method based on numerical control gear machine tool - Google Patents
Secondary tool setting method based on numerical control gear machine tool Download PDFInfo
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- CN116922155B CN116922155B CN202311197485.3A CN202311197485A CN116922155B CN 116922155 B CN116922155 B CN 116922155B CN 202311197485 A CN202311197485 A CN 202311197485A CN 116922155 B CN116922155 B CN 116922155B
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 82
- 230000009191 jumping Effects 0.000 claims description 16
- 238000005520 cutting process Methods 0.000 claims description 10
- 238000009966 trimming Methods 0.000 claims description 10
- 210000003781 tooth socket Anatomy 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013480 data collection Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
- B23Q15/20—Automatic control or regulation of feed movement, cutting velocity or position of tool or work before or after the tool acts upon the workpiece
- B23Q15/22—Control or regulation of position of tool or workpiece
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23F—MAKING GEARS OR TOOTHED RACKS
- B23F23/00—Accessories or equipment combined with or arranged in, or specially designed to form part of, gear-cutting machines
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Abstract
The invention discloses a secondary tool setting method based on a numerical control gear machine tool, which comprises the following steps of collecting workpiece coordinates: the gear to be tested is arranged on a workpiece shaft, and the detection head is moved to the position of the gear to be tested; selecting two adjacent teeth on the measured gear as a first measured tooth and a second measured tooth; the workpiece shaft rotates positively to enable the front face of the first measured tooth to be located at the position of the detection head, then an acquisition point A is selected on the front face of the first measured tooth, and the coordinate posA of the acquisition point A is obtained; the workpiece shaft rotates positively to enable the front face of the second measured tooth to be located at the position of the detection head, then an acquisition point B is selected on the front face of the second measured tooth, and the coordinate posB of the acquisition point B is obtained; the workpiece shaft is reversed, the back surface of the first measured tooth is positioned at the position of the detection head, then an acquisition point C is selected on the back surface of the first measured tooth, and coordinates posC of the acquisition point C are obtained. Compared with the existing method, the method is simple to operate and high in precision.
Description
Technical Field
The invention belongs to the field of machine tools, and particularly relates to a secondary tool setting method based on a numerical control gear machine tool.
Background
The numerical control gear hobbing machine is a machine tool for processing gears according to a generating method. Before machining a workpiece, alignment of the tool and the workpiece must be performed to determine the positional relationship between the tool and the workpiece being machined, i.e., tool setting. With the higher requirements on the usability of the gears, more and more gears are subjected to hardness or other process requirements, after the workpiece is roughly cut, the workpiece is separated from a machine tool to be quenched or other process treatment, the quenched or other process treated gears are clamped again to be finished, and at the moment, the hob and the workpiece are required to be aligned (the hob teeth are matched with tooth grooves of the processed part), namely, secondary tool setting is performed.
The secondary tool setting is one of complex process preparations in numerical control machining, and along with the development of machine tool manufacturing technology to an automatic and efficient direction, the problem that the conventional gear hobbing machine tool setting method relies on manual experience, visual measurement tool setting is time-consuming and labor-consuming is solved. The patent with the application number of 201310244103.8 discloses an automatic secondary tool setting method based on a numerical control gear hobbing machine tool, which mainly adopts a three-point measurement method through an intelligent amplifier, a sensor and related mechanical devices, and comprises the steps of setting high and low points on the intelligent amplifier, performing trial cutting, and completing automatic secondary tool setting by compensating from a program.
The existing three-point measurement method needs to collect three points of high point-low point-high point or low point-high point-low point, wherein the coordinates of the point B are close to the tooth crest, and the coordinates of the point A and the point C are close to the tooth root; and then calculating the midpoint coordinates of the tooth slot according to the coordinates of the C point and the coordinates of the B point, namely the coordinates of the tool setting point. Because the coordinates of the point B and the coordinates of the point C are not on the same circumference, the calculation of the coordinates of the tool setting point is inconvenient, the intelligent amplifier is required to adjust the setting parameters according to different gear specifications and different measuring heads, and the requirement on the skill level of operators is high. Meanwhile, burrs are easily generated at the tooth top and the tooth root after rough machining, expansion is easily generated at the tooth top and the tooth root after heat treatment, and the precision at the tooth top and the tooth root is not high. The acquisition of workpiece coordinates in the vicinity of the tooth tip and tooth root affects the acquisition accuracy.
The existing three-point measuring method has low precision, needs an operator to set parameters of an intelligent amplifier, is troublesome to operate and has high requirement on the capability level of the operator. Therefore, it is necessary to provide a secondary tool setting method with higher precision and simpler operation.
Disclosure of Invention
The invention aims at: aiming at the problems, the secondary tool setting method based on the numerical control gear machine tool is simple to operate and high in precision.
The technical scheme adopted by the invention is as follows:
a secondary tool setting method based on a numerical control gear machine, the method comprising:
collecting coordinates of a workpiece:
mounting the gear to be detected on a workpiece shaft, and moving the detection head to the gear to be detected; selecting two adjacent teeth on the measured gear as a first measured tooth and a second measured tooth;
the workpiece shaft rotates positively to enable the front face of the first measured tooth to be located at the position of the detection head, then an acquisition point A is selected on the front face of the first measured tooth, and the coordinate posA of the acquisition point A is obtained;
the workpiece shaft rotates positively to enable the front face of the second measured tooth to be located at the position of the detection head, then an acquisition point B is selected on the front face of the second measured tooth, and the coordinate posB of the acquisition point B is obtained;
the workpiece shaft is reversed, the back surface of the first measured tooth is positioned at the position of the detection head, then an acquisition point C is selected on the back surface of the first measured tooth, and the coordinate posC of the acquisition point C is obtained;
the positions of the acquisition point A, the acquisition point B and the acquisition point C are positioned in the error zone of the same reference circle on the measured gear;
calculating a tooth socket midpoint coordinate posZ:
posZ=(posB-posC)/2；
judging errors:
calculating an acquisition point A according to the posB and the posA, and taking an angle alpha formed by the acquisition point B and the circle center of the gear to be measured;
judging whether the angle of alpha is within the error range of the angle of each tooth of the gear to be measured; if yes, performing first-piece workpiece adjustment and cutting;
cutting the first workpiece:
setting a cutter by using a tooth slot midpoint coordinate posZ to finish the adjustment and cutting of the first workpiece;
determining a cut compensation value T:
determining a trimming compensation value T according to the trimming result of the first workpiece;
determining tool setting point coordinates posD:
correcting the tooth socket midpoint coordinate posZ according to the determined trimming compensation value T, and determining a tool setting point coordinate posD; posd=posz+t.
Further, each tooth angle=360 °/n, n being the number of teeth of the gear under test.
Further, the positions of the acquisition point A, the acquisition point B and the acquisition point C are positioned on the same dividing circle of the gear to be measured.
Further, before collecting the workpiece coordinates, judging whether the state of the detection head is met or not through the detection head, if yes, collecting the workpiece coordinates, otherwise, alarming, and retracting the detection head.
Further, judging whether the workpiece to be measured on the workpiece shaft is a gear by the detection head includes:
setting the working state of the detection head, enabling the electric signal of the detection head to comprise a first state and a second state, enabling a jumping point of the electric signal from the first state to the second state to be a pitch circle position of the gear, enabling the electric signal of the detection head to be the first state when the detection head detects an area below the pitch circle of the gear, and enabling the electric signal of the detection head to be the second state when the detection head detects an area above the pitch circle of the gear;
moving the detection head to the workpiece to be detected and then fixing the detection head;
judging the state of the electric signal of the detection head;
if the state is the first state, the workpiece shaft rotates positively;
when the forward rotation angle of the workpiece shaft is smaller than 200 degrees and the electric signal jumps to be in a second state, the workpiece shaft stops rotating; at the moment, judging that the workpiece to be detected is a gear, and acquiring coordinates of a jumping point, wherein the jumping point is an acquisition point A;
when the forward rotation angle of the workpiece shaft is equal to 200 degrees and the electric signal is still in a state I, judging that the workpiece to be detected is not a gear; alarming and detecting the withdrawal of the head;
if the state is the second state, judging whether the electric signal of the primary detection head is the first state or not every 0.3 times of every tooth angle of the forward rotation of the workpiece shaft;
when the judgment times are less than 10 and the electric signal is in a state one, the workpiece shaft continuously rotates positively; when the angle of the continuous forward rotation of the workpiece shaft is smaller than 200 degrees and the electric signal jumps to a second state, the workpiece shaft stops rotating; at the moment, judging that the workpiece to be detected is a gear, and acquiring coordinates of a jumping point, wherein the jumping point is an acquisition point A; when the angle of the workpiece shaft continuously rotating forwards is equal to 200 degrees and the electric signal is still in a state I, judging that the workpiece to be detected is not a gear; alarming and detecting the withdrawal of the head;
when the judging times are equal to 10 and the electric signal is still in the second state, judging that the workpiece to be detected is not a gear at the moment; and alarming to withdraw the detection head.
Further, in the process from the collection point A to the collection point B, the workpiece shaft is rotated at the speed V 1 Forward rotation, so that a tooth slot between the first measured tooth and the second measured tooth is positioned at the position of the detection head; the workpiece shaft rotates at a speed V 2 Forward rotating to make the front face of the second measured tooth be positioned at the position of the detection head, wherein V 1 ＞V 2 。
Further, in the process from the collection point B to the collection point C, the workpiece shaft is rotated at the rotation speed V 3 Reversing to enable a tooth slot between the first measured tooth and the second measured tooth to be positioned at the position of the detection head; the workpiece shaft rotates at a speed V 4 Reversing to locate the back of the first measured tooth at the detection head, wherein V 3 ＞V 4 。
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
compared with the existing secondary tool setting method, the secondary tool setting method is simple to operate, does not need an operator to set amplifier parameters, reduces the requirements on the skills of operators, and can be widely applied. Meanwhile, the acquisition point is positioned at the reference circle, so that adverse effects caused by rough machining and heat treatment can be reduced, and the accuracy of finding points can be improved.
Drawings
FIG. 1 is a schematic diagram of a mining point.
In the figure, 1-first measured tooth, 2-second measured tooth, 3-detection head, 101-acquisition point A, 102-acquisition point B, 103-acquisition point C.
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.
As shown in fig. 1, the invention discloses a secondary tool setting method based on a numerical control gear machine tool, which comprises the following steps:
step 1, judging the type of a workpiece on a workpiece shaft:
mounting the gear to be detected on a workpiece shaft, and moving the detection head 3 to the gear to be detected; and judging whether the workpiece to be detected on the workpiece shaft is a gear or not through the detection head 3, if so, collecting workpiece coordinates, and otherwise, alarming and retracting the detection head.
Step 2, collecting workpiece coordinates:
as shown in fig. 1, two adjacent teeth are selected as a first measured tooth 1 and a second measured tooth 2 on the measured gear;
the workpiece shaft rotates positively, so that the front surface of the first measured tooth 1 is positioned at the position of the detection head 3, then an acquisition point A101 is selected on the front surface of the first measured tooth 1, and the coordinate posA of the acquisition point A101 is obtained;
the workpiece shaft rotates positively to enable the front face of the second measured tooth 2 to be located at the position of the detection head 3, then a collection point B102 is selected on the front face of the second measured tooth 2, and the coordinate posB of the collection point B102 is obtained;
the workpiece shaft is reversed, the back surface of the first measured tooth 1 is positioned at the position of the detection head 3, then an acquisition point C103 is selected on the back surface of the first measured tooth 1, and the coordinate posC of the acquisition point C103 is obtained;
the positions of the acquisition point A101, the acquisition point B102 and the acquisition point C103 are positioned in the error zone of the same reference circle on the measured gear;
the invention selects the acquisition point A101, the acquisition point B102 and the acquisition point C103 at the reference circle, and the tooth surface precision at the reference circle is higher than the tooth top and tooth groove precision, thus being more beneficial to improving the tool setting precision. Since the accuracy of each tooth surface is not necessarily the same, the acquisition point a101, acquisition point B102, acquisition point C103 are allowed to deviate upward or downward by a certain distance at the pitch circle. The error band of the reference circle is an annular band formed by the maximum distance of the upward deviation and the maximum distance of the downward deviation. In the optimal case, the acquisition point A101, the acquisition point B102 and the acquisition point C103 are all positioned on the same dividing circle.
The acquisition point A101 is a coarse positioning point, the acquisition point B102 and the acquisition point C103 are fine positioning points, and the position of the acquisition point A101 is determined firstly so as to accurately determine the positions of the acquisition point B102 and the acquisition point C103 according to the acquisition point A101.
Step 3, calculating a tooth socket midpoint coordinate posZ: posz= (posB-posC)/2.
Step 4, judging errors:
calculating an included angle alpha formed by the acquisition point A101, the acquisition point B102 and the circle center of the gear to be measured according to the posB and the posA; judging whether the angle of alpha is within the error range of the angle of each tooth of the gear to be measured; if yes, performing first-piece workpiece adjustment and cutting; wherein each tooth angle=360 °/n, n being the number of teeth of the gear under test.
The above process determination process is exemplified by specific data;
if the number of teeth of the measured gear is 6 teeth, the measured gear has a tooth angle=60°. If α=59° is calculated according to posB and posA, and the error range of the measured gear per tooth angle is 60 ° ± 1 °, the 59 ° is within the error range of the measured gear per tooth angle, the next step can be performed, and the first workpiece is trimmed.
Step 5, adjusting and cutting the first workpiece:
and (5) setting a tool by using a point coordinate posZ in the tooth slot to finish the adjustment and cutting of the first workpiece.
Step 6, determining a trimming compensation value T:
and determining a trimming compensation value T according to the trimming result of the first workpiece.
Step 7, determining a tool setting point coordinate posD:
correcting the tooth socket midpoint coordinate posZ according to the determined trimming compensation value T, and determining a tool setting point coordinate posD; posd=posz+t.
Compared with the existing secondary tool setting method, the secondary tool setting method is simple to operate, does not need an operator to set amplifier parameters, reduces the requirements on the skills of operators, and can be widely applied. Meanwhile, the acquisition point is positioned at the reference circle, so that adverse effects caused by rough machining and heat treatment can be reduced, and the accuracy of finding points can be improved.
Further, in step 1, determining whether the workpiece to be measured on the workpiece shaft is a gear by the detection head 3 includes:
setting the working state of the detection head 3, wherein the electric signal of the detection head 3 comprises a first state and a second state, the jumping point of the electric signal from the first state to the second state is the pitch circle position of the gear, when the detection head 3 detects the area below the gear pitch circle, the electric signal of the detection head 3 is the first state, and when the detection head 3 detects the area above the gear pitch circle, the electric signal of the detection head 3 is the second state;
the detection head 3 is fixed after moving to the workpiece to be detected;
judging the state of the electric signal of the detection head 3;
if the state is the first state, the workpiece shaft rotates positively;
when the forward rotation angle of the workpiece shaft is smaller than 200 degrees and the electric signal jumps to be in a second state, the workpiece shaft stops rotating; at the moment, judging that the workpiece to be detected is a gear, and acquiring coordinates of a jumping point, wherein the jumping point is an acquisition point A;
when the forward rotation angle of the workpiece shaft is equal to 200 degrees and the electric signal is still in a state I, judging that the workpiece to be detected is not a gear; alarming and retracting the detecting head 3;
if the state is the second state, judging whether the electric signal of the primary detection head 3 is the first state or not every 0.3 times of every tooth angle of the forward rotation of the workpiece shaft;
when the judgment times are less than 10 and the electric signal is in a state one, the workpiece shaft continuously rotates positively; when the angle of the continuous forward rotation of the workpiece shaft is smaller than 200 degrees and the electric signal jumps to a second state, the workpiece shaft stops rotating; at the moment, judging that the workpiece to be detected is a gear, and acquiring coordinates of a jumping point, wherein the jumping point is an acquisition point A; when the angle of the workpiece shaft continuously rotating forwards is equal to 200 degrees and the electric signal is still in a state I, judging that the workpiece to be detected is not a gear; alarming and retracting the detecting head 3;
when the judging times are equal to 10 and the electric signal is still in the second state, judging that the workpiece to be detected is not a gear at the moment; the alarm is given and the detection head 3 is retracted.
When the tool is set, numerical control program parameters are adjusted according to parameters of the measured gear, so that the distance between the detection head and the measured gear is determined, and the angle of each tooth of the measured gear is determined; determining which position of the gear is in a first state, and determining a jumping point; the detection head is an infrared or other type sensor, the first state of the electric signal can be a low level, the second state is a high level or the first state of the electric signal is a high level, and the second state is a low level; in the present invention, the first state of the electric signal is set to a low level and the second state is set to a high level. After all parameters are recorded in the numerical control system, the workpiece to be detected can be arranged on the workpiece shaft, and whether the workpiece to be detected has error or not is detected. If the error is contained, the numerical control system alarms, and if the error is not contained, the coordinate acquisition is started.
The electric signal of the detection head is in a state once, and whether a high level appears is judged in the range of 200 DEG rotation of the workpiece shaft, so that the rotation angle is reduced, the detection duration is reduced, meanwhile, the gear has at least 3 teeth, and at least two teeth can be covered by 200 deg. If no teeth appear within 200 degrees, the workpiece to be measured is inevitably misplaced, and is not necessarily a gear.
When the electric signal of the detection head is in a second state, each time of forward rotation of the workpiece shaft is 0.3 times of each tooth angle, so that the phenomenon that the workpiece shaft cannot rotate due to the fact that a subsequent program is deleted when the numerical control program is in a high level is avoided.
Further, in step 2, the workpiece shaft is rotated at a rotation speed V from the acquisition point A101 to the acquisition point B102 1 The tooth socket between the first measured tooth 1 and the second measured tooth 2 is positioned at the position of the detection head 3; the workpiece shaft rotates at a speed V 2 Forward rotation, the front surface of the second measured tooth 2 is positioned at the position of the detection head 3; wherein V is 1 ＞V 2 。
In the process from the acquisition point A101 to the acquisition point B102, the speed is high and then low, and the acquired data can be ensured to be more accurate. The detection head 3 is firstly positioned in the tooth slot, at the moment, the electric signal is at a low level, and data collection is started in a low level state, so that false detection can be avoided.
Further, in step 2, the workpiece shaft is rotated at a speed V from the collection point B102 to the collection point C103 3 Reversing to enable a tooth slot between the first measured tooth 1 and the second measured tooth 2 to be positioned at the position of the detection head 3; the workpiece shaft rotates at a speed V 4 Reversing to enable the back surface of the first measured tooth 1 to be positioned at the position of the detection head 3; wherein V is 3 ＞V 4 。
In the process from the acquisition point B102 to the acquisition point C103, the speed is high and then low, and the acquired data can be ensured to be more accurate. The detection head 3 is firstly positioned in the tooth slot, at the moment, the electric signal is at a low level, and data collection is started in a low level state, so that false detection can be avoided.
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 (7)
1. A secondary tool setting method based on a numerical control gear machine tool is characterized in that: the method comprises the following steps:
collecting coordinates of a workpiece:
mounting the gear to be detected on a workpiece shaft, and moving a detection head (3) to the gear to be detected; selecting two adjacent teeth on the detected gear as a first detected tooth (1) and a second detected tooth (2);
the workpiece shaft rotates positively, the front face of a first measured tooth (1) is positioned at a detection head (3), then an acquisition point A (101) is selected on the front face of the first measured tooth (1), and the coordinate posA of the acquisition point A (101) is obtained;
the workpiece shaft rotates positively, the front face of the second measured tooth (2) is positioned at the position of the detection head (3), then an acquisition point B (102) is selected on the front face of the second measured tooth (2), and the coordinate posB of the acquisition point B (102) is obtained;
the workpiece shaft is reversed, the back surface of the first measured tooth (1) is positioned at the position of the detection head (3), then an acquisition point C (103) is selected on the back surface of the first measured tooth (1), and the coordinate posC of the acquisition point C (103) is obtained;
the positions of the acquisition point A (101), the acquisition point B (102) and the acquisition point C (103) are positioned in the error zone of the same reference circle on the measured gear;
calculating a tooth socket midpoint coordinate posZ: posz= (posB-posC)/2;
judging errors:
calculating an acquisition point A (101) according to the posB and the posA, and taking an angle alpha formed by the acquisition point B (102) and the circle center of the gear to be measured;
judging whether the angle of alpha is within the error range of the angle of each tooth of the gear to be measured; if yes, performing first-piece workpiece adjustment and cutting;
cutting the first workpiece:
setting a cutter by using a tooth slot midpoint coordinate posZ to finish the adjustment and cutting of the first workpiece;
determining a cut compensation value T:
determining a trimming compensation value T according to the trimming result of the first workpiece;
determining tool setting point coordinates posD:
correcting the tooth socket midpoint coordinate posZ according to the determined trimming compensation value T, and determining a tool setting point coordinate posD; posd=posz+t.
2. The numerical control gear machine-based secondary tool setting method according to claim 1, characterized in that: every tooth angle=360 °/n, n being the number of teeth of the gear under test.
3. The numerical control gear machine-based secondary tool setting method according to claim 1, characterized in that: the positions of the acquisition point A (101), the acquisition point B (102) and the acquisition point C (103) are positioned on the same dividing circle of the gear to be measured.
4. The numerical control gear machine-based secondary tool setting method according to claim 1, characterized in that: before the workpiece coordinates are collected, whether the workpiece to be detected on the workpiece shaft is a gear or not is judged through the detection head (3), if yes, the workpiece coordinates are collected, if not, an alarm is given, and the detection head returns.
5. The numerical control gear machine-based secondary tool setting method according to claim 4, wherein: judging whether the workpiece to be detected on the workpiece shaft is a gear through the detection head comprises:
setting the working state of the detection head (3), enabling the electric signal of the detection head (3) to comprise a first state and a second state, enabling a jumping point of the electric signal from the first state to the second state to be a reference circle position of a gear, enabling the electric signal of the detection head (3) to be the first state when the detection head (3) detects a region below the reference circle of the gear, and enabling the electric signal of the detection head (3) to be the second state when the detection head (3) detects a region above the reference circle of the gear;
moving the detection head (3) to the workpiece to be detected and then fixing the detection head;
judging the state of the electric signal of the detection head (3);
if the state is the first state, the workpiece shaft rotates positively;
when the forward rotation angle of the workpiece shaft is smaller than 200 degrees and the electric signal jumps to be in a second state, the workpiece shaft stops rotating; at the moment, judging that the workpiece to be detected is a gear, and acquiring coordinates of a jumping point, wherein the jumping point is an acquisition point A;
when the forward rotation angle of the workpiece shaft is equal to 200 degrees and the electric signal is still in a state I, judging that the workpiece to be detected is not a gear; alarming, and retracting the detection head (3);
if the state is the second state, judging whether the electric signal of the primary detection head (3) is the first state or not every 0.3 times of every tooth angle of the forward rotation of the workpiece shaft;
when the judgment times are less than 10 and the electric signal is in a state one, the workpiece shaft continuously rotates positively; when the angle of the continuous forward rotation of the workpiece shaft is smaller than 200 degrees and the electric signal jumps to a second state, the workpiece shaft stops rotating; at the moment, judging that the workpiece to be detected is a gear, and acquiring coordinates of a jumping point, wherein the jumping point is an acquisition point A; when the angle of the workpiece shaft continuously rotating forwards is equal to 200 degrees and the electric signal is still in a state I, judging that the workpiece to be detected is not a gear; alarming, and retracting the detection head (3);
when the judging times are equal to 10 and the electric signal is still in the second state, judging that the workpiece to be detected is not a gear at the moment; the alarm is given, and the detection head (3) is retracted.
6. The numerical control gear machine-based secondary tool setting method according to claim 1, characterized in that: in the process from the acquisition point A (101) to the acquisition point B (102), the workpiece shaft rotates at the speed V 1 The tooth socket between the first measured tooth (1) and the second measured tooth (2) is positioned at the position of the detection head (3); the workpiece shaft rotates at a speed V 2 Forward rotation, the front surface of the second measured tooth (2) is positioned at the position of the detection head (3); wherein V is 1 ＞V 2 。
7. The numerical control gear machine-based secondary tool setting method according to claim 1, characterized in that: in the process from the collection point B (102) to the collection point C (103), the workpiece shaft rotates at the speed V 3 Reversing to enable a tooth slot between the first measured tooth (1) and the second measured tooth (2) to be positioned at the position of the detection head (3); the workpiece shaft rotates at a speed V 4 Reversing to enable the back surface of the first measured tooth (1) to be positioned at the position of the detection head (3); wherein V is 3 ＞V 4 。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311197485.3A CN116922155B (en) | 2023-09-18 | 2023-09-18 | Secondary tool setting method based on numerical control gear machine tool |
Applications Claiming Priority (1)
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