JPH052452B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a profiling control method, and more particularly to a profiling control method in surface profiling that can improve processing efficiency.

[Conventional technology]

When tracing a model using a tracing control device, conventionally the model is generally traced along the route shown by the bold line in FIG. In the figure, M is the model, ST is the tracing start point, EN is the tracing end point, and P1 and P2 are the left and right pick feed positions, respectively. That is, conventionally, tracing feed is performed in the +X-axis direction from the tracing start point ST, a predetermined amount of pick feed is performed when the tracer head reaches the right pick feed position P2, and after the predetermined amount of pick feed is completed, tracing feed is performed in the −X-axis direction. When the tracer head reaches the left pick feed position P2, a predetermined amount of pick feed is performed, and this operation is repeated until the tracer head follows the pattern and reaches the end point EN.

[Problem that the invention seeks to solve]

By the way, the closer the pick feed positions P1 and P2 are set to the model M, the shorter the tracing route will be, and the shorter the time it will take to trace the model M. However, in reality, there is a distance between the model M and the pick feed positions P1 and P2. As shown in Figure 7, a certain amount of space must be provided. The reason for this is that in order to trace model M with a prescribed accuracy, it is necessary to trace the model at a prescribed speed, but even if tracing feed is started after the pick feed ends, the prescribed feed rate is not reached immediately; This is because a certain distance is required before the speed reaches a predetermined speed. In this way, since it is necessary to provide a certain amount of space between the model M and the pick feed positions P1 and P2, it is not possible to alternately perform the profiling feed and pick feed as in the conventional example described above. becomes longer,
There was a problem that made it impossible to increase processing efficiency.

The present invention solves the above-mentioned problems, and its purpose is to provide a profiling control system that improves processing efficiency in surface profiling.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention creates velocity signals in the feed axis direction and the surface profiling axis direction based on the displacement signal from the tracer head 1 that tracks the surface of the model 3 during surface profiling, and The model 3 and the tracer head 1 according to the axial and surface profiling axial velocity signals.
by relatively moving said tracer head 1 until it reaches a position having a predetermined relationship with the pick feed position, and by reaching a position where said tracer head 1 has a predetermined relationship with the pick feed position. The model 3 and the tracer head 1 are moved according to the speed signal in the direction of the pick feed axis, the speed signal in the feed axis direction, and the speed signal in the surface profile axis direction. By relatively moving the tracer head 1 in the direction of the pick feed axis by a predetermined amount, the model 3 and the model 3 are moved in accordance with the speed signals in the feed axis direction and the surface profiling axis direction. The configuration is adopted as a profile control system for surface profiling, which is characterized by moving the tracer head 1 relatively.

[Function] Since pick feed and tracing feed are performed simultaneously, the tracing path becomes shorter than in the conventional example, and therefore machining efficiency in surface tracing can be improved.

〔Example〕

FIG. 1 is a diagram showing an example of a tracing route according to the method of the present invention, where the feed axis is the X axis and the tracing axis is the Z axis.
This is for the case where the pick feed axis is the Y axis. In this figure, the same reference numerals as in FIG. 7 represent the same parts.

The tracer head placed at the tracing start point ST first moves +X at a speed according to the speed signal in the X-axis direction.
Sent axially. Then, when it reaches point a on the pick feed position P2, the tracer head moves to
It is sent in the -X-axis direction at a speed according to the speed signal in the axial direction, and it is sent in the -Y-axis direction at a speed according to the speed signal in the Y-axis direction (pick feed signal).
Then, the amount of movement in the Y-axis direction becomes a predetermined amount pl, and b
Once the point is reached, the tracer head is moved in the -X axis direction at a velocity that is dependent on the Y axis velocity signal. When the tracer head reaches point c on the pick feed position P1, the tracer head is sent in the +X-axis direction at a speed according to the speed signal in the X-axis direction, and also in the -Y-axis direction at a speed according to the speed signal in the Y-axis direction. Sent. Then, when the amount of movement in the Y-axis direction reaches a predetermined amount pl and reaches point d, the tracer head is sent in the +X-axis direction at a speed according to the speed signal in the X-axis direction. Thereafter, similar operations are performed, and the tracer head moves along the path d→e→f→g→h→
It is sent along i→j→k→l to the end point EN.

As described above, according to this embodiment, the tracing path can be made shorter than that of the conventional example shown in FIG. 7, so that processing efficiency can be improved.

FIG. 2 is a diagram showing another tracing route according to the method of the present invention, in which P1' and P2' indicate positions a predetermined distance l before the pick feed positions P1 and P2, respectively, and the same reference numerals as in the other FIG. represent the same part.

The tracer head placed at the tracing start point ST is first sent in the +X-axis direction at a speed according to the speed signal in the X-axis direction. And pick feed position P
When reaching point a, which is a predetermined amount l before point 2, the tracer head moves at a speed according to the speed signal in the X-axis direction.
It is sent in the X-axis direction and also in the -Y-axis direction at a speed according to the speed signal in the Y-axis direction. Here, Y
Feeding based on the speed signal in the axial direction is performed until the amount of movement of the tracer head in the Y-axis direction reaches a predetermined amount pl.
The feeding in the X-axis direction is continued until the tracer head reaches the pick feed position P2. Therefore, the tracer head is, for example, a → b → c
The point c on the pick feed position P2 is reached through the route . When the tracer head reaches point c on the pick feed position P2, the tracer head is sent in the -X axis direction by the speed signal in the X axis direction. When the tracer head reaches point d, which is a predetermined distance l before the pick feed position P1, the tracer head is sent in the -X-axis direction at a speed that follows the speed signal in the X-axis direction, and also follows the speed signal in the Y-axis direction. It is sent in the -Y axis direction at a speed. When the tracer head moves along the path d→e→f to point f, the tracer head is sent in the +X-axis direction by the velocity signal in the X-axis direction. Similar operations are performed thereafter, and the tracer head is sent along the path f→g→h→i→j→k→l→m→n to the end point EN. If the speed signal in the Y-axis direction is appropriately set, the model M can be traced along the route shown in FIG. 3, and in this way, the traced route can be made the shortest.

FIG. 4 is a block diagram showing an example of the apparatus used when carrying out the method of the present invention, in which 1 is a tracer head, 2 is a stylus, 3 is a model, 4 is a displacement synthesis circuit, 5 is an adder, 6, 7 is a speed signal generation circuit that outputs a normal velocity signal V _N and a tangential velocity signal V _T , respectively; 8 is a microprocessor 15
If the signal h applied from the output section 17 is "1", the tangential velocity passes through as it is,
In the case of “0”, a polarity inversion circuit that inverts the polarity and outputs it, 9 is a distribution circuit, 10 is a gate circuit, 11X
~11Z is a drive circuit, 12X~12Z are motors for relatively moving the tracer head 1 and model 3 in the X, Y, and Z axis directions, and 13X~
13Z outputs a + pulse each time motors 12X to 12Z rotate forward by a predetermined angle, and
~12Z is a position detector that outputs a - pulse when it is reversed by a predetermined angle, and 14X~14Z increments its count value by 1 every time a + pulse is added from the position detectors 13X~13Z, and each time a - pulse is added. It is a counter that subtracts its count value by 1,
The count value corresponds to the X, Y, and Z coordinates indicating the current position of the tracer head 1. In addition, 15 is a microprocessor, 16 is a microprocessor, and 16 is a
A memory in which data such as the X coordinates of pick feed positions P1 and P2, the X coordinates of P1' and P2', and the reference displacement amount ε _O shown in FIG. 3 are stored, 17 is an output section, 18 is an input section, 19 , 20 is a DA converter, 2
1 is an indexing circuit.

_{Displacement signals ∈} The displacement synthesis circuit 4 is ε
_A ^composite _displacement signal _ε ^of ₌ ^√ The difference Δε from the displacement signal ε is added to the speed signal generation circuits 6 and 7, and the speed signal generation circuits 6 and
7 is the normal velocity signal V _N and the tangential velocity signal
Output V _T. Further, the indexing circuit 21 creates displacement direction signals sin θ and cos θ indicating the displacement direction within the profile plane (assumed to be the XZ plane in this case) and applies them to the distribution circuit 9 . The distribution circuit 9 receives a tangential velocity signal V _T , a normal velocity signal V _N , a displacement direction signal sinθ,
Based on cos θ, speed signals in the X and Z axis directions are created and applied to the gate circuit 10. The gate circuit 10 performs a gate operation according to control signals c and d applied from the microprocessor 15 via the output section 17, and in this embodiment, both control signals c and d are "0". In this case, the speed signals in the X and Z axis directions output from the distribution circuit 9 are applied to the drive circuits 11X and 11Z, respectively, and when the control signals c and d are both "1", the speed signals in the X and Z axis directions are applied. A velocity signal in the Y-axis (pick feed axis) direction, which is applied to the drive circuits 11X and 11Z, and also from the microprocessor 15 via the DA converter 20, is applied to the drive circuit 11Y, and the control signals c and d are set to "0", respectively. , in the case of "1", only the speed signal in the Y-axis direction applied from the microprocessor 15 via the DA converter 20 is applied to the drive circuit 11Y. Then, the motors 12X to 12Z are driven by the output signals of the drive circuits 11X to 11Z,
The tracer head 1 and the model 3 move relative to each other. The above-mentioned operation is already well known as tracing control.

FIG. 5 is a flowchart showing the processing contents of the microprocessor 15 when tracing a model along the tracing path shown in FIG. 1, and the operation at that time will be explained below with reference to the same figure.

When the start of tracing is commanded, the microprocessor 15 first applies a control signal to the output section 17, and sets the output signals b, c, and d to "1", "0", and "0", respectively.
Set to “0” (step S1). As a result, the polarity inversion circuit 8 outputs the tangential velocity signal V _T as it is, and the gate circuit 10 outputs the tangential velocity signal V T as it is, and the gate circuit 10 outputs the X, Z
Since the axial speed signal is applied to the drive circuits 11X and 11Z, the tracer head 1 moves along the path ST→a shown in FIG. Next, the microprocessor 15 determines whether the tracer head 1 has reached the right pick feed position P2 (step S2), and if the determination result is YES, determines whether the tracer head 1 has reached the tracing end point EN. (step)
S3). Note that whether or not the tracer head 1 has reached the pick feed position P2 is determined based on the X coordinate of the pick feed position P1 stored in the memory 16 and the count value of the counter 14X via the input section 18. Furthermore, whether or not the tracer head 1 has reached the tracing end point EN is determined based on the Y coordinate of the tracing end point EN stored in the memory 16 and the count value of the counter 14Y.

Then, when it is determined that the tracer head 1 has reached the pick feed position P1 and has not reached the tracing end point EN, the microprocessor 15
applies a control signal to the output section 17, and sets the output signals b, c, and d to "0", "1", and "1", respectively (step S4). As a result, the speed signals in the X and Z axis directions outputted from the distribution circuit 9 and the speed signals in the Y axis direction outputted from the microprocessor 15 via the output section 17 and the DA converter 20 are transmitted to the drive circuits 11X and 11X, respectively. 11Z and 11Y, tracer head 1 follows the path a→b shown in FIG.
move along.

Next, the microprocessor 15
Based on the count value of 4Y, it is determined whether the tracer head 1 has moved by a predetermined amount pl in the Y-axis direction (step S5). When it is determined that the predetermined amount pl has moved, the microprocessor 15 applies a control signal to the output section 17, and sets all of the output signals b, c, and d to "0" (step S6). As a result, the polarity inversion circuit 8 applies a signal with the polarity of the tangential speed signal _V Therefore, the tracer head 1 moves along the path b→c shown in FIG.

Next, the microprocessor 15 determines whether the tracer head 1 has reached the left pickfeed position P1 (step S7), and the determination result is
If YES, the end point of tracer head 1
It is determined whether EN has been reached (step S8).
Then, when it is determined that the tracer head 1 has reached the pick feed position P1 and has not reached the tracing end point EN, the microprocessor 15 applies a control signal to the output section 17, and outputs the output signal b,
Both c and d are set to "1" (step S9). As a result, the gate circuit 10 transmits speed signals in the X, Y, and Z axis directions to the drive circuits 11X, 11Y, and 11, respectively.
Z, so the tracer head 1 moves along the path c→d in FIG. When it is determined that the tracer head 1 has moved by a predetermined amount pl in the Y-axis direction, the microprocessor 15 executes a step.
Returning to the process of S1, the tracer head 1 moves along the path d→e. Thereafter, similar processing is performed, and the tracer head 1 moves along the path d→e→f→g→h→i→j→k→l to the end point EN.

FIG. 6 is a flowchart showing the processing contents of the microprocessor 15 when tracing a model along the tracing path shown in FIG. 2 or 3, and the microprocessor 15 is instructed to start tracing. Then, first, a control signal is applied to the output section 17,
The output signals b, c, d are "1", "0", respectively.
It is set to "0" (step S21). As a result, the tracer head 1 moves along the path ST→a shown in FIG. Then, the tracer head 1 is located at a position P2' which is a predetermined amount l before the pick feed position P2.
When it is determined that the microprocessor 15 has reached this point (step S2), the microprocessor 15 applies a control signal to the output section 17, and sets all output signals b, c, and d to "1" (step S23). This allows tracer head 1
moves along the path a→b shown in FIG.

Next, the microprocessor 15 determines whether the tracer head 1 has moved a predetermined amount pl in the Y-axis direction (step S24) or has reached the right pick feed position PP2 (step S25). step
If it is determined in S24 that tracer head 1 has moved by a predetermined amount pl in the Y-axis direction, microprocessor 1
5 applies a control signal to the output section 17, and sets the output signals b, c, and d to "1", "0", and "0", respectively (step S28). This allows tracer head 1
moves along the path b→c shown in FIG. 2, and eventually reaches the pick feed position P2. Then, when it is determined in step S29 that the tracer head 1 has reached the pick feed position P2, the microprocessor 15 moves the tracer head 1 to the pick feed position P2.
It is determined whether the curve has reached the end point EN (step S30), and if the determination result is NO, a control signal is applied to the output section 17 and the output signal b,
Both c and d are set to "0" (step S31). As a result, the tracer head 1 moves along the path c→d shown in FIG. Furthermore, if it is determined in step S25 that the tracer head 1 has reached the pick feed position P2, that is, if the tracer head has reached the pick feed position P2 before the amount of movement of the tracer head 1 in the Y-axis direction reaches pl, the micro The processor 15 applies a control signal to the output section 17 and sets the output signals b, c, and d to "1" and "1", respectively.
The values are set to "0" and "1" (step S26). As a result, the velocity signal in the Y-axis direction from the DA converter 20 is applied to the drive circuit 11 via the gate 10, so that the tracer head 1 moves in the -Y-axis direction. Then, the amount of movement in the Y-axis direction is a predetermined amount pl
When the microprocessor 15 determines that the current state has been reached (step S27), the microprocessor 15 moves to step S31.

When the process of step S31 is completed, the microprocessor 15 moves the tracer head 1 to a position P that is a predetermined amount l before the left pick feed position P1.
1' is reached (step
S32). When it is determined that the tracer head 1 has reached P1', the microprocessor 15 applies a control signal to the output section 17, and outputs the output signals b, c,
Let d be "0", "1", and "1", respectively. As a result, the tracer head 1 moves along the path d→ as shown in FIG.
Move along e. Next, the microprocessor 15 moves the tracer head 1 by a predetermined amount pl in the Y-axis direction.
It is determined whether it has moved (step S34) or whether it has reached the right pickfeed position P2 (step S35). If it is determined in step S34 that the tracer head 1 has moved by a predetermined amount pl in the Y-axis direction, the microprocessor 15 applies a control signal to the output section 17 and sets all output signals b, c, and d to "0". (step S36). This allows tracer head 1
moves along the path e→f shown in FIG. 2, and eventually reaches the pick feed position P1. Then, when it is determined in step S37 that the tracer head 1 has reached the pick feed position P1, the microprocessor 15 moves the tracer head 1 to the pick feed position P1.
It is determined whether the trace has reached the end point EN (step S40), and if the determination result is NO, the process returns to step S1. As a result, the tracer head 1 moves along the path f→g shown in FIG. Furthermore, if it is determined in step S35 that the tracer head 1 has reached the pick feed position P1, that is, the amount of movement of the tracer head 1 in the Y-axis direction is
If the tracer head reaches pick feed position P1 before reaching pl, microprocessor 1
5 applies a control signal to the output section 17 to set the output signals b, c, and d to "0", "0", and "1", respectively (step S38). As a result, the speed signal in the Y-axis direction from the DA converter 20 is applied to the drive circuit 11 via the gate 10, so that the tracer head 1
will move in the -Y axis direction. And Y
When it is determined that the amount of movement in the axial direction has reached the predetermined amount pl (step S39), it is determined whether the profiling end point EN has been reached (step S40), and the profiling end point is reached.
If it is determined that ENN has not been reached, the process returns to step S1, and if it is determined that the tracing end point EN has been reached, the process is ended. below,
A similar process is repeated and the tracer head moves along the path shown in FIG. 2 or 3.

〔Effect of the invention〕

As explained above, the present invention has the advantage that since the profiling and pick-feeding are performed simultaneously, the profiling path can be shortened, and therefore the machining efficiency can be improved in surface profiling.

[Brief explanation of the drawing]

1 to 3 are diagrams showing tracing routes according to the method of the present invention, FIG. 4 is a block diagram showing an example of the apparatus used when carrying out the method of the present invention, and FIGS.
The figure is a flowchart showing the processing contents of the microprocessor 15, and FIG. 7 is a diagram showing the tracing route of the conventional example. 1 is a tracer head, 2 is a stylus, 3 is a model, 4 is a displacement synthesis circuit, 5 is an adder, 6 and 7 are speed signal generation circuits, 8 is a polarity inversion circuit, 9 is a distribution circuit, 10 is a gate circuit, 11X ~11Z is the drive circuit, 12X~12Z is the motor, 13X~13Z
is a position detector, 14X to 14Z are counters, 15
is a microprocessor, 16 is a memory, 17 is an output section, 18 is an input section, 19 and 20 are DA converters,
21 is an indexing circuit.

Claims (1)

[Claims] 1. In surface tracing, speed signals in the feed axis direction and the surface tracing axis direction are created based on displacement signals from a tracer head that tracks the model surface, and speed signals in the feed axis direction and the surface tracing axis direction are created. moving the model and the tracer head relative to each other in accordance with a speed signal until the tracer head reaches a position having a predetermined relationship with respect to the pickfeed position; the model and the tracer head according to the velocity signal in the direction of the pickfeed axis, the velocity signal in the direction of the feed axis, and the velocity signal in the direction of the surface profiling axis by reaching a position having a relationship with the pickfeed axis of the tracer head. The tracer head is relatively moved until the amount of movement in the direction of the pick feed axis reaches a predetermined amount. A profiling control method for surface profiling, characterized in that the model and the tracer head are relatively moved.