JPS6156061B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a traverse grinding control device for an angular grinding machine, and more particularly, to traverse grinding a cylindrical part of a workpiece using a first grinding surface formed on the grinding wheel and parallel to the axis of the workpiece. A second grinding surface that is orthogonal to the first grinding surface that has been ground is engaged with the step end surface adjacent to the cylindrical portion at one end of the traverse stroke, and both the cylindrical portion and the step end surface of the workpiece are machined in parallel. The present invention relates to a novel control device configured to do the following. Generally, when grinding both the cylindrical part and the end face of the stepped part adjacent to the cylindrical part, it is preferable to simultaneously grind both the cylindrical part and the stepped part end face using an angular grinder from the viewpoint of machining time. The same holds true when the cylindrical part is wide and the cylindrical part is traverse-ground. To perform traverse grinding of the cylindrical part and grinding of the step end face in parallel using an anguilla grinder, set the traverse range of the table that supports the workpiece according to the finished diameter of the cylindrical part and the finished position of the end face. Then, at one end of the traverse stroke, the end face of the stepped portion is ground by the grinding surface of the grinding wheel, so that when the cylindrical portion reaches the finished size, the end face of the stepped portion also reaches the finished size. That is, as shown in Fig. 1, when the first grinding surface Ga, which is parallel to the workpiece axis Ow of the grinding wheel G, is located at the finishing dimension position Wa' of the outer peripheral surface Wa of the cylindrical part, the first grinding surface Ga is perpendicular to the first grinding surface. Second grinding surface
The position where Gb is located at the finished dimension position Wb' of the end face Wb is the first traverse end, and the position where the first ground surface Ga protrudes from the end of the cylindrical part Wa by a predetermined amount is the second traverse end.
As a traverse end, the workpiece W is reciprocated between the first traverse end and the second traverse end,
The grinding wheel G may be intermittently cut at these traverse ends until the cylindrical portion Wa reaches the finished size. In such traverse grinding, if the grinding wheel cuts at both ends of the traverse stroke, the cylindrical surface
Wa and the end face Wb can be efficiently ground, but when the workpiece is moved from the second traverse end to the first traverse end, the second
The grinding Gb comes into contact with the step end face at the traverse speed, causing burns on the step end face, making it difficult to finish the step end face with high precision. For this reason, in the past, the cylindrical portion and the step end face were ground separately, or the second traverse end was ground without making a cut. For this reason, machining takes a lot of time compared to machining only the cylindrical portion. The present invention aims to eliminate such conventional problems and enable the cutting of the grinding wheel to be performed at both ends of the traverse stroke, so that the traverse grinding of the cylindrical part and the end face of the stepped part can be processed in parallel in a short time. In the process where the table moves from the second traverse end to the first traverse end,
Until the table is moved from the first traverse end to a position in front of you by a distance corresponding to the amount of movement of the second grinding surface of the grinding wheel in the previous cutting process, the moving speed of the table is changed to the second grinding surface of the grinding wheel. This is characterized in that the moving speed is reduced from a speed at which burns occur on the end surface when it engages with the end surface of the workpiece to a speed at which burns do not occur on the end surface. Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a schematic configuration of an angular grinding machine according to the present invention, in which a grindstone head 21 supporting an angular grinding wheel G slides along guide surfaces 22 and 23 formed on a bed 20. A feed screw 26 connected to a pulse motor 25 via a gear mechanism 24 is screwed into the grindstone head 21 . On the other hand, the work table 27 is slidably guided in the Y-axis direction along guide surfaces 28 and 29 formed on the front surface of the bed 20, and is driven by a pulse motor 30. A feed screw 31 is screwed together. A headstock 32 and a tailstock 33 are placed on the work table 27,
A workpiece W having a wide cylindrical portion Wa and a stepped portion adjacent to the cylindrical portion is rotatably supported by the center of the headstock 32 and the tailstock 33. The rotation axis Ow of this workpiece W is the work table 27
It is parallel to the guide surface of the grinding wheel G, and the path 3 of the grinding wheel G
8 and forms an acute angle θ. On the outer peripheral surface of the grinding wheel G, there is a rotation axis of the workpiece W.
A first grinding surface Ga parallel to Ow and a second grinding surface Gb orthogonal to this are formed, and these first
The cylindrical portion Wa and the end surface Wb of the stepped portion of the workpiece W are ground by the grinding surface Ga and the second grinding surface Gb. Since the travel path 38 of the grinding wheel G forms an acute angle θ with the rotational axis Ow of the workpiece W, even if the grinding wheel G is moved by a predetermined amount L in the direction of the travel path 38, the first grinding surface Ga remains at the radius of the workpiece W. Control becomes complicated because it moves only by L sin θ in the direction (X-axis direction). In this embodiment, by setting the gear ratio of the gear mechanism 24 to a predetermined value,
When the pulse motor 25 is distributed with n pulses whose setting unit is △l, the grinding wheel G is moved by (nX△l)/sinθ along the path 38, so that the first grinding of the grinding wheel G is performed. The surface Ga moves by a distance equal to the number of pulses given to the pulse motor 25. Furthermore, the cylindrical part of the workpiece W is placed on the bed 20.
A dimension measuring head 40 that sends a signal representing the diameter of the cylindrical portion Wa to a sizing circuit 39 that determines the dimension of Wa.
and an end face position measuring head 4 that sends a signal representing the position of the reference end face Ws to an end face position detection circuit 41 that positions the workpiece W to the reference position in the Y-axis direction.
2 is provided. Next, a control device for performing traverse grinding using the angular grinder having the above configuration will be explained. 43 is a small processing unit (hereinafter referred to as CPU) such as a microcomputer, and this CPU 43 includes a plurality of digital switches DS0 to DS8 that set data necessary for traverse grinding, and a drive that drives pulse motors 25 and 30. Unit DU
1. DU2 and interrupt signal INTS for pulse distribution
A pulse distribution command circuit 44 that generates a pulse is connected thereto. The CPU 43 executes the program stored in the internal memory to perform the necessary control to perform the traverse grinding cycle shown in FIG. 3.
In this embodiment, the first grinding surface Ga of the grinding wheel G is rotated by V ₁ at both ends of the traverse stroke until the cylindrical portion Wa reaches the dimension at which rough grinding is completed and the sizing signal AS1 is output from the sizing circuit 39. Feed, sizing signal AS1
When is output, the depth of cut at both ends of the traverse stroke is reduced from V ₁ to V ₂ . And the cylindrical part Wa
becomes the finished dimension, and the sizing signal is sent from the sizing circuit 40.
When AS2 is output, the grinding process is completed and the low stone wheel G is moved backward. The depth of cut V ₁ , V ₂ and cutting speed Fc of the first grinding surface Ga during rough grinding and fine grinding are set by digital switches DS3 to DS5, and the traverse stroke Lt and traverse speed Ft are set by digital switches DS3 to DS5.
is set on digital switches DS6 and DS7. In parallel with such traverse grinding, the step end face
To grind Wb, it is necessary to accurately control the first traverse end (rightward advancing end of the work table 27) according to the finished diameter of the cylindrical portion Wb. Now, the fourth
As shown by the two-dot chain line in the figure, the reference plane of the workpiece W
The position where the intersection Po of the Ws plane and the rotation center Ow of the workpiece intersects with the extension line of the travel path 38 is
7 as the reference position, the work table 27 is
The work table 27 can be indexed to the first traverse end by moving from the reference position by L ₁ - (D ₁ /2tanθ) in the Y-axis direction, and this first
If the traverse operation is performed starting from the traverse end, the cylindrical surface Wa and the end surface Wb can be simultaneously ground. In addition,
L ₁ indicates the distance between the reference surface Ws and the finished position of the step end surface Wb, and D ₁ indicates the finished diameter of the cylindrical portion Wa. A digital switch is used to perform this index control.
Data for distance L ₁ and finished diameter D ₁ are set in DS0 and DS1. In addition, in order to prevent burns from occurring on the step end surface Wb, the CPU 43 performs one traverse step in the fifth step.
As shown in the figure, control is divided into five steps: first traverse end cut, leftward traverse, second traverse end cut, rightward traverse, and end face grinding feed. The feed speed is set at such a speed that burn-out does not occur on the stepped portion Wb. The feed rate Fe during this end face grinding is set by the digital switch DS8. Furthermore, in order to prevent the pulse motor from stepping out at the end of the traverse, slow-up control is performed at the start point of the traverse stroke, and slow-down control is performed at the end point. The pulse distribution command circuit 44 controls this slow-up and slow-down, and as shown in FIG.
A DA converter 61 that converts the speed data F stored in 0 to an analog value, and a flip-flop that is set when a slow-up command SUC and a slow-down command SDC are given from the CPU 43.
SUF and SDF, and a voltage that outputs a gradually increasing voltage signal as shown in FIG. 7a when the flip-flop SDC is set, and outputs a gradually decreasing voltage signal as shown in FIG. 7b when the flip-flop SDF is set. A signal generation circuit 62, a VF converter 63 that outputs pulses at a cycle according to the magnitude of the signal output from the voltage signal generation circuit 62, and a VF
This VF converter 6 is composed of a flip-flop PGF and a gate AG that enable or disable the pulses output from the converter 63.
The pulse output from 3 is used as the interrupt signal INTS.
It is given to the CPU 43. Slow-up command SUC
In a state where neither slowdown command SDC nor slowdown command SDC is given, switches S1 and S in the voltage signal generation circuit 62
2 is closed, switches S3 and S4 are open, and the VF converter 63 outputs a pulse with a frequency corresponding to the signal output from the DA converter 61, that is, the speed data F output from the CPU. This is given to the CPU 43 as an interrupt signal INTS. On the other hand, the CPU 43, as described later,
Every time the interrupt signal INTS is supplied, the pulse distribution process shown in FIG. 9 is executed, and one pulse is distributed to the commanded axis. Therefore, when the CPU 43 sets F data representing the pulse distribution speed in the register 60,
An interrupt signal INTS with a frequency proportional to the value of this F data is output from the pulse distribution command circuit 44, and the CPU 43 distributes the commanded axis pulse every time it receives this interrupt signal INTS. . Also, by setting either flip-flop SUF or SDF in the pulse distribution command circuit 44,
When a voltage signal that gradually increases or decreases is output from the voltage signal generation circuit 62, the period of pulse distribution is increased or decreased thereby, and slow-up or slow-down is performed. Note that the frequency of pulse distribution after slowdown is set lower than the self-starting frequency of the pulse motor by a predetermined amount. Next, the specific operation of the CPU 43 is shown in FIG.
This will be explained according to the flowcharts from b to FIG. 11. Work table 2 on which the workpiece W is currently attached
7 is located at the workpiece attachment position shown in FIG. 12a, when an unillustrated start switch is pressed,
The CPU 43 has a control routine shown in FIG. 8a and b.
Run COR. In this control routine COR,
Programmatic cycle counter SC
It is designed to identify the process being executed. Table 1 shows the steps corresponding to the count values of the cycle counter SC.

[Table] At the start of operation, the cycle counter SC is preset to -2 in step 12 of the control routine COR, so the CPU 43 moves from step 13 to step 21 and controls indexing to the reference position. When the process moves to step 21, a Y-axis flag that specifies the moving direction is set, and at the same time, in step 22, the speed data Fw for table indexing stored in the memory of the CPU 43 is outputted to the pulse distribution command circuit 44. 9. Jump to the pulse distribution routine PGR shown in FIG. The pulse distribution routine PGR distributes pulses to the commanded axes, and is executed once from step 60 following the control routine OOR. After that, the pulse distribution routine PGR distributes pulses to the commanded axes. Each time the interrupt signal INTS is generated, the routine is executed from step 62, and each time this pulse distribution routine is executed, one distributed pulse is sent in the commanded direction at step 65. Also,
Step 62 of this pulse distribution routine PGR,
64, 67, 74, and 76 are steps that branch after determining whether the process currently being executed is one of the processes shown in Table 1. Before or after pulse distribution is performed for each process, Perform specific processing at each step as required by each step. When the moving direction is set to the Y-axis and the cycle counter SC is set to -2, as in this case, the pulses are distributed to the Y-axis in step 65, and the work table 27 is moved at the indexing speed Fw. Moved to the right by one pulse. Thereafter, since the cycle counter SO is -2, the process moves from step 67 to step 68, and it is determined whether the end face position detection circuit 41 has outputted the index completion signal PES. Since speed data Fw for indexing is output to the pulse distribution command circuit 44, pulses with a period corresponding to the speed data Fw are distributed to the Y axis, and the work table 27 is moved to the right at the indexing speed Fw. If the cycle counter SC is -2, after distributing pulses in step 65, the process moves from step 67 to step 68, and it is determined whether the end face position detection circuit 41 has outputted the index completion signal PES. If the index completion signal PES is not output, the process returns to the main routine (not shown) and waits for an interrupt from the pulse distribution command circuit 44.
When the work table 27 is indexed to the reference position shown in FIG. 12b and the indexing completion signal PES is sent from the end face position detection circuit 41, 1 is added to the count value of the cycle counter SC in step 69 and - 1 and return to the control routine COR. When the count value of the cycle counter SC becomes -1, the process moves from step 14 to step 23, and control is performed to index the work table 27 to the first traverse end. That is, in step 23, the movement amount L ₁ -(D ₁ /2tanθ) of the work table 27 is set in the movement amount counter MVC, and then step 2
At steps 4 and 25, the Y-axis flag is set, the indexing speed data Fw is output, and the process jumps to the pulse distribution routine PGR. Jumping to the pulse distribution routine PGR:
Pulse distribution command circuit 44 in the same manner as in the above case.
Every time an interrupt signal INT is sent from , a pulse is output to the Y axis. In addition, in this case, each time a pulse is sent to the Y-axis, the movement amount counter MVC is subtracted in step 66 of the pulse distribution routine PGR.
When the work table 27 is indexed to the first traverse end shown in FIG. 12c and the count value of the movement amount counter MVC becomes zero, the process moves from step 71 to step 74 via step 73. Further, in this case, since the cycle counter SC is -1, the process moves from step 74 to step 75, where a hydraulic forward command is given to a hydraulic circuit (not shown) to move the grinding wheel G to the hydraulic forward end. Thereafter, in step 77, 1 is added to the count value of the cycle counter SC to make the count value zero, and the process returns to the control routine COR. Note that since the flip-flop PGF in the pulse distribution command circuit is reset in step 73, no pulse distribution is performed during hydraulic advance. When the count value of cycle counter SC becomes zero,
The process moves from step 15 to step 26 to set the rapid feed amount Vo in the movement amount counter MVC, and in steps 27 and 28 the X-axis flag is set and the fast feed speed data Fr is output, and the process jumps to the pulse distribution routine PGR. In this case, X until the count value of the movement amount counter MVC becomes zero.
Pulses are distributed to the axis and the movement counter MVC
When the count value of SC becomes zero, the count value of the cycle counter SC is set to 1 in step 77, and the control routine starts.
Return to COR. When n pulses corresponding to the rapid feed amount Vo are distributed on the X axis, the grinding wheel G moves to path 3.
8 by nxΔl/sinθ. As a result, the first processing surface Ga of the grinding wheel G is accurately moved by the rapid feed amount Vo set in the digital switch DS3. When the control routine COR returns, the count value of the cycle counter SC is 1, so the process moves from step 16 to step 33, and the cutting at the first traverse end is controlled. Step 33 is a step to determine whether or not the process to be performed is a rough grinding depth of cut. If it is a rough grinding depth of cut, in step 34, the depth of cut V ₁ set in the digital switch DS3 is calculated by the movement amount counter.
If the cut is not for rough grinding, the process proceeds to step 35, and the depth of cut _V2 set in the digital switch DS4 is set in the movement counter MVC. In this case, since the rough grinding flag is set at the start of operation, step 34 is started.
Then, the depth of cut _V1 is set in the movement amount counter MVC. After this, the X-axis flag is set in step 36, and the cutting feed rate is set in step 37.
Output FC and jump to pulse distribution routine PGR. In this case, the cycle counter SC is 1
Therefore, the process moves from step 64 to step 79, and it is determined whether the machining is completed or not based on whether a machining completion flag FINF, which will be described later, is set. In this case, since the machining completion flag FINF is not set, step 65 is executed.
, and sends a pulse to the X axis. and,
Such an operation is executed every time the interrupt signal INTS is sent from the pulse distribution command circuit 44, and a pulse is sent to the X-axis. 6
The process moves to the process shown in FIG. 10 via steps 6, 67, 71, and 72, and it is checked whether or not the sizing signal is being sent. That is, since the forward end position of the grinding wheel G in the cutting process during rough grinding and fine grinding is managed by the sizing signal from the sizing circuit 39, if the count value of the movement amount counter MVC becomes zero, Even if it is not, the feeding of the grinding wheel G must be stopped when the sizing signal is quickly output from the sizing circuit 39.
Therefore, if the count value of the movement amount counter MVC is not zero, the routine jumps from step 72 to the sizing routine TCR shown in FIG. 10, and the sizing signal is checked every time a pulse is sent to the X axis. Since no sizing signal is sent during the first cut, pulses are distributed to the X axis until the count value of the movement amount counter MVC becomes zero. As a result, the grinding wheel G is moved along the path 38 by V ₁ /sinθ, and the first grinding surface Ga and the second grinding surface Gb
As shown in FIG. 14, V ₁ and V ₁ /
The grinding wheel G is moved by tanθ, and the first grinding surface Ga and the second grinding surface Gb of the grinding wheel G are cut into the cylindrical portion Wa and the step end surface Wb of the workpiece W, as shown in FIG. 12d. When the contents of the movement amount counter MVC become zero, the count value of the cycle counter SC is incremented to 2 in step 77, and the process returns to the control routine COR. When the count value of the cycle counter SC reaches 2, the process moves from step 17 to step 30, where control is performed to move the work table 27 to the left. This is done by setting the traverse amount Lt in the movement amount counter MVC in step 30, setting the Y-axis flag in step 31, and then outputting the traverse speed data Ft to the pulse distribution command circuit 44 in step 32 to proceed to the pulse distribution routine PGR. It is done by jumping. The pulse distribution routine PGR is used to control slow-up and slow-down during the traverse stroke.
The program jumps from step 62 to the speed control routine VCR shown in FIG. After this, pulse distribution processing in steps 65 and 66 is performed. The program in FIG. 11 sets the slow-up flag in the pulse distribution command circuit 44 at the start of movement.
SUF is set so that the frequency of the interrupt signal INTS output from the pulse distribution command circuit 44 gradually increases, and when the work table 27 moves to the slowdown start position, the slowdown flag is set.
SDF is set to gradually reduce the frequency of the interrupt signal INTS output from the pulse distribution circuit 44. Therefore, as shown in FIG. 13a, the traverse speed of the work table 27 gradually increases at the start of movement, and gradually decreases when the work table 27 moves to the slow-down position. In order to minimize the time required for slowing down, the feed rate after slowing down is set to a high value within a range that does not cause the pulse motor to step out when stopped. When the traverse stroke ends and the work table 27 is located at the left advance end (second traverse end) as shown in FIG. The count value is set to 3 and the process returns to the control routine. When the count value reaches 3, the process moves from step 16 to step 33, where the grinding wheel G makes a cut. In this case as well, as in the case of the cut at the first traverse end described above, the process shown in FIG. The grinding wheel G is fed by V ₁ /sinθ in the travel direction. As a result, the second grinding surface Gb is
It is moved in the Y-axis direction by V ₁ /tanθ. When the cutting at the second traverse end is completed in this way, the count value of the cycle counter SC is set to 4 and the process returns to the control routine COR, so that the routines from step 38 onwards are executed. The routine after step 38 is a control routine for moving the work table 27 to the right.
to determine whether rough grinding or fine grinding is in progress,
If rough grinding is in progress, move to step 39 and
-(V ₁ /tanθ)-α is set in the travel amount counter MVC, and if fine grinding is in progress, proceed to step 40 and Lt-(V ₂ /tanθ)-α is set in the travel amount counter MVC.
Set to . Then, in step 41, the Y-axis flag is set, and in step 42, the traverse speed Ft is output, and the pulse distribution routine is started.
Jump to PGR and distribute pulses to Y axis. In this case, since rough grinding is in progress, the work table is adjusted to Lt-(V ₁ /
tanθ) - moved to the right by α. Note that the constant α is the second value when the work table 27 moves to the right end.
An appropriate value is set in advance for the clearance between the ground surface Gb and the step end surface Wb. As a result, the second grinding surface Gb of the grinding wheel G is moved to a point that is α in front of the step end surface Wb, as shown in FIGS. 12f and 15. Also in this traverse stroke, the slow-up and slow-down control as described above is performed. When such a traverse stroke is completed, the count value of the cycle counter SC is updated to the pulse distribution routine.
Since step 77 of PGR advances to 5, when the control routine COR returns, the end face grinding program from step 43 onwards is executed. First, in step 43, it is determined whether rough grinding is in progress or fine grinding is in progress. If it is determined that rough grinding is in progress, the process moves to step 44 and V ₁ /tanθ+α is set in the movement amount counter MVC. do. After that, after setting the Y-axis flag in step 46, the process moves to step 47, where the end face grinding feed rate data Fe set in the digital switch DS8 is outputted to the pulse distribution command circuit 44, and the process jumps to the pulse distribution routine PGR. do. As a result, the work table 27 is moved to the right by V ₁ /tanθ+α at a speed Fe set by the digital switch DS8 so as not to burn the end face of the stepped portion Wb, as shown in FIG. 13b, until it reaches the first traverse end. will be moved. When the work table 27 moves to the first traverse end and the count value of the movement amount counter MVO becomes zero, the count value of the cycle counter SC is 5, so steps 76 to 78 are executed in the pulse distribution routine PGR. Then, the count value of the cycle counter SC is set to 1 and the process returns to the control routine COR. When the count value of cycle counter SC becomes 1,
The cutting of the grinding wheel G at the first traverse end is performed, and this is followed by the above-described rough grinding cycle being performed again. When such a grinding cycle is repeated and the size of the cylindrical portion Wa reaches the size at which the rough grinding is completed, a rough grinding completion signal AS1 is outputted from the sizing circuit 39 and given to the CPU 43.
Then, the CPU 43 determines this in step 82 of the sizing control routine TCR, sets a fine grinding flag in step 83, and memorizes that fine grinding has begun. When fine grinding begins, the depth of cut of the first grinding surface Ga of the grinding wheel G at the traverse end is changed from V ₁ to V ₂ . Also, by changing this depth of cut, the amount of traverse movement in the cycle Lt-V ₂ /tan
The movement amount of the work table 27 in the cycle is changed to V ₂ /tanθ+α. Thereby, even if the depth of cut of the grinding wheel G decreases, the amount of idle grinding in the cycle is kept constant. Further, when the cylindrical portion Wa of the workpiece W reaches the finished size and the sizing signal AS2 is sent from the sizing circuit 39, step 84 of the sizing control routine TCR is performed.
This is determined in step 85, and a machining completion flag FINF is set. As a result, the grinding wheel is hydraulically quickly returned at one of the traverse ends, and then returned to its original position by the pulse motor 25. By performing such traverse grinding, the cylindrical portion Wa and the stepped portion Wb can be ground in parallel in a short time. In addition, in the above embodiment, slow-up control is performed at the start point of the traverse stroke, and slow-down control is performed at the end point, but the work table is moved at a speed lower than the speed determined by the self-starting frequency of the pulse motor. When traversing, there is no need to perform such slow-up and slow-down control. As described above, in the traverse grinding control device according to the present invention, the work table is moved to a position in front of the first traverse end by a distance corresponding to the amount of movement of the second grinding surface of the grinding wheel in the previous cutting process. Before moving, the speed of the worktable is reduced from a traverse speed at which burns occur on the end face when the second grinding surface of the grinding wheel engages the end face of the workpiece to a speed that does not cause burns on the end face of the workpiece step. Therefore, even if the grinding wheel makes a cut at the second traverse end and the end face of the stepped portion is ground by moving the second grinding surface due to this cut at the first traverse end, the second The grinding surface does not hit the step part at the traverse speed, and the end face of the step part can be machined with high precision. Therefore, even when grinding both the cylindrical part of the workpiece and the end face of the adjacent step part at the same time,
Traverse grinding can be performed by cutting the grinding wheel at both traverse ends, which has the advantage of being able to process both the cylindrical part and the stepped end face of the workpiece in a short time.

[Brief explanation of the drawing]

Fig. 1 is a diagram for explaining the principle of traverse grinding according to the present invention, Figs. 2 to 14 show examples of the present invention, and Fig. 2 is a schematic plan view of an anguilla grinding machine and A diagram with a circuit diagram, Figure 3 is a diagram showing the entire process of the grinding cycle, Figure 4 is a diagram to explain the positioning of the work table,
FIG. 5 is a diagram showing one step of each traverse cycle, FIG. 6 is a diagram showing a specific configuration of the pulse distribution command circuit 44 in FIG. 2, and FIGS. Figures 8a and 11 are flowcharts showing the operation of the processing unit 43 in Figure 2. Figure 12 shows the positions of the grinding wheel and workpiece in each step of the grinding cycle. Diagram showing relationships, 13th
Figures a and b are diagrams showing changes in the moving speed of the work table 27 in the traverse process, Figure 14 is a diagram showing the relationship between the amount of cut of the grinding wheel and the amount of movement of the grinding surface, and Figure 15 is a diagram showing the end face grinding feed. It is a figure which shows the positional relationship of the end surface and the 2nd grinding surface in a starting position. 21... Grinding wheel head, 25, 30... Pulse motor, 27... Work table, 32... Headstock,
33...tailstock, 38...path, 39...sizing circuit, 40...dimension measuring head, 41...end face position detection circuit, 42...end face position measuring head, 43...
...Arithmetic processing unit, 44...Pulse distribution command circuit,
DS1 to DS7...Digital switch, Ft...Traverse speed, Fe...End face cutting speed, G...Grinding wheel, Ga...First grinding surface, Gb...Second grinding surface, Lt
... Traverse stroke, V ₁ , V ₂ ... Grinding wheel depth of cut, W ... Workpiece, Wa ... Cylindrical portion, Wb ... Step end face.

Claims (1)

[Claims] 1 Machining the workpiece by moving the grinding wheel, which has a first grinding surface parallel to the workpiece axis and a second grinding surface orthogonal to the first grinding surface, in a sliding direction having a predetermined angle with the workpiece axis. A control device for grinding both a cylindrical part wider than the first grinding surface and a step end face adjacent to one end of the cylindrical part by an angular grinder, the cylindrical part being The machining process is carried out between a first traverse end where the second ground surface is positioned at the final finishing position of the end surface when machined to the final finishing dimension, and a second traverse end where the first ground surface protrudes from the cylindrical surface. traverse means for reciprocating a table supporting an object at a traverse speed that causes burns on the end surface when a second grinding surface of the grinding wheel engages with the end surface of the workpiece; and the first and second traverse ends. a cutting means for cutting the grinding wheel by a predetermined amount in the sliding direction; and a cutting means for cutting the grinding wheel by a predetermined amount in the sliding direction; The traverse speed of the table is changed from the traverse speed to a speed at which burns do not occur on the end surface of the workpiece until the table is moved from the first traverse end to a position nearer to the workpiece by a distance corresponding to the amount of movement in the axial direction of the workpiece. A traverse grinding control device for an anguilla grinding machine, characterized in that it is equipped with a traverse speed control means for reducing the traverse speed.