JP2539618Y2 - Control device for end face sizing device - Google Patents

Description

[Detailed description of the invention] "Industrial application field" This invention controls an end face sizing device fixed to a whetstone table of an angle slide moving along a straight path at an angle θ with respect to the center line of a work. It concerns the device.

`` Conventional technology '' When positioning the work reference surface supported by the headstock and tailstock placed on the table by the end face sizing device at the position where it comes into contact with the end face sizing device, Since there is variation, the indexing position of the table for rapid traverse taking into account the variation of the reference surface based on the workpiece shape data is commanded, and after positioning at this position, the table is moved by the sizing operation until a fixed size signal is output. It moves to determine the fixed size position.

[Problem to be Solved by the Invention] As shown in FIG. 4, the numerical control of the grinding machine having the grindstone a of the angle slide is performed at the work center (work reference plane Wp).
The intersection point O between the work center line and the reference plane Wp is controlled based on the intersection point O between the work center line and the reference plane Wp. It is commanded as the fixed size command position L '.

However, an angle slide grindstone a that moves along a straight path that forms an angle θ with the center line of the workpiece a
When the end face sizing device b is fixed to the end face, the end face sizing device b moves together with the grindstone table a. For this reason, the command value L required to determine the table position for positioning the work reference plane Wp at the sizing position by the end face sizing device b is determined in the radial direction where the end face sizing device b contacts the work reference surface Wp. It depends on the position X (fixed size use position).

For this reason, conventionally, a worker calculates a correction value Δ according to the sizing use position X, and uses the correction value Δ to set the sizing command position L ′.
It was necessary to correct NC data and plasticize the NC data.

The present invention has been made in order to solve the above problems, and by inputting and instructing the end face fixed size use position,
It is an object of the present invention to provide a control device of an end face sizing device which can calculate a command value required for determining a table position for automatically positioning a work reference plane at a sizing position.

"Means for Solving the Problems" As a specific means for achieving the above object, an acute angle θ is formed with respect to a center line of a work supported on a headstock and a tailstock mounted on a table. In the control device of the end face sizing device fixed to the grindstone table of the angle slide moving along the intersecting straight path, a contact point of the end face sizing device and a reference line of the work on the center line of the work from the work reference position. Sizing command value command means for commanding a sizing command value that is a distance to an intersection of
End face sizing use position command means for instructing the end sizing use position, which is the contact point between the reference end face of the work and the contactor of the sizing device, as an end face sizing use value in a direction orthogonal to the center line of the work, Correction value calculating means for calculating a correction value in a direction parallel to the center line of the workpiece based on the end face sizing use position and the acute angle θ; and a sizing command value instructed by the sizing command value command means. Target command position calculating means for calculating a target command position based on the correction value calculated by the correction value calculating means; movement control means for moving the table to the target command position calculated by the target command position calculating means; There is provided a control device for an end face sizing device, comprising:

[Operation] According to the control device for the end face sizing device, the sizing command value is commanded by the sizing command value command means, and the reference end face of the workpiece and the radial direction of the sizing device are commanded by the end face sizing use position command means. The correction value calculation means calculates a correction value in the direction of the center line of the work based on the reference end face of the work, the contact position in the radial direction of the sizing device, and the acute angle θ. When this correction value is calculated, the target command value calculation means
The target command position is calculated based on the distance from the work reference position to the fixed size command position and the correction value calculated by the correction value calculation means, and the movement control means positions the table at the target command position, thereby obtaining the work reference value. The surface is brought into contact with the end face sizing device.

"Example" An example of the present invention will be described with reference to the accompanying drawings.

In FIG. 1, reference numeral 21 denotes a work table which is slidably guided in the Z-axis direction along a guide surface formed on the front surface of a bed 20, and which is screwed on a feed screw 23 driven by a pulse motor 22. I agree. A headstock 25 and a tailstock 26 are placed on the work table 21, and the center of the headstock 25 and the tailstock 26 causes a cylindrical portion Wa and a shoulder portion adjacent to the cylindrical portion Wa.
A work W on which Wb is ground is rotatably supported.

Also, reference numeral 27 denotes a grinding wheel base on which an angular grinding wheel G having a cylindrical surface Ga parallel to the main shaft axis Os and an end surface Gb orthogonal to the cylindrical surface Ga is mounted. The nut 28 is slidably guided along the formed guide surface in the X-axis direction intersecting the Z-axis at an acute angle θ.
And screwed into a feed screw 31 connected to the pulse motor 30 via a.

Further, an end surface sizing device 32 is fixed to the grindstone table 27 of the angle slide, and has a tracing stylus 33 which comes into contact with the reference surface Wp of the work W. The table 21 is moved to set the reference surface position to the sizing point. And the work coordinate system is set.

On the other hand, reference numeral 40 denotes a numerical control device constituted by a computer or the like, and a data input device 42, a manual pulse generator 43, various command switches CS1 to CS3 for processing start and the like via a not-shown interface outside the memory 41. Is connected. The sizing signal from the end face sizing device 32 is also input to the numerical controller 40 via an interface (not shown). The numerical controller 40 distributes command pulses to the drive units DUZ and DUX that drive the pulse motors 22 and 30, respectively, and moves the work table 21 and the grindstone table 27 according to a predetermined machining program stored in the memory 41.

45 and 46 are position detection counters that output positive and negative command pulses respectively distributed to the drive units DUZ and DUX, reversibly count and output position data Dz and Dx representing the current position of the work table 21 and the grinding wheel head 27. And position data Dz and Dx output from the position detection counters 45 and 46.
Can be read into the numerical controller 40 via an interface (not shown). In the present embodiment, the cylindrical surface Ga of the grinding wheel G is at the reference position of the grinding wheel head 27 that is in contact with the spindle axis Os, and the position data Dx output from the counter 46 indicates how much the grinding wheel head 27 is from this reference position. Whether it is in the retracted position is indicated by a diameter in accordance with the distance between the cylindrical surface Ga and the main axis Os. The reference position of the work table 21 is a table origin Q ₁ a work table 21 is a position indicated by the two-dot chain line in FIG. 1, the position data Dz output from the counter 45, the work table 21 is the table how much from the origin Q ₁ represents whether it has moved to the left.

Here, the mechanical origin Q is the cylindrical surface of the grinding wheel G
When Ga coincides with the spindle axis Os, it is the position of the grinding wheel end face,
This point Q is a point that does not move even if the grinding wheel head 27 moves or the table 21 moves. In addition, as the table origin Q _1,
This is also the point at which the origin detector 43 provided at a point separated from the mechanical origin Q by a predetermined amount detects the magnetizing body 44 provided on the table 21. The counter 45 is reset to zero by the return of the origin of the table 21 and counts the table movement command pulse to indicate the current position of the table. This state corresponds to the machine coordinate system.

In the angular grinding machine as described above, the reference surface Wp of the work W is positioned at the fixed position of the end face measuring device 32,
Positioning of each processing surface is performed based on this point. FIG. 2 is a flowchart showing a target command value calculation process required for determining a table position for positioning at a sizing position of the end face sizing device. First, before the target position calculation process, return the table 21 to the table origin Q _1, left position not in contact with the workpiece when the end surface sizing device 32 is advanced in the third diagram from the table origin Q ₁ ( work reference position) is commanded distance Z ₁ to P, further wheel head 27 end surface measuring device 32 and the contact position of the reference surface Wp of the workpiece W (from spindle axis Os to the position of the end surface sizing use position) Distance (end surface fixed size use value) r is instructed. And in step 100,
It is determined whether it is an end face sizing index command, and if so, the left position required for indexing the table position for positioning to the sizing position of the end face sizing device 32 based on the shape data of the workpiece W input in step 101 is determined. distance from direction position P to the intersection of the spindle axis Os of the reference surface Wp of the end surface measuring device 32 and the workpiece W (sizing command value) L ₁ is calculated. Subsequent step 102
Then, it is determined whether the end face sizing device 32 is fixed to the grindstone table 27 of the angle slide.
In based on the input end surface sizing use position r, the correction value Δ with respect to the command value L ₁ calculated in the step 101, wherein Δ
= −r / 2 · tanθ. And step 104
In addition the correction values Δ to the sizing command value L _1, the end surface measuring device
Target command value L ₂ is indexed position of the table position for positioning the sizing position of 32 is calculated. If the end face sizing device 32 is not fixed to the grindstone table 27 of the angle slide in the step 102, it is not necessary to make a correction, so that Δ = 0 in the step 105. Then, after this target command position L ₂ is positioned at the indexed position at rapid traverse commanded until further size signal at dimensions operation is outputted, sizing indexing is completed by moving the table 21 I do.

“Effect of the Invention” The present invention has the above-described configuration, and the correction value calculating means calculates a correction value in the direction of the center line of the work based on the end face sizing use position and the acute angle θ, and the correction value and the sizing command are calculated. Since the table is calculated based on the values, the end face sizing device automatically contacts the end face sizing device and the reference surface Wp of the work W only by instructing the radial position of the reference end face of the work. Table position.

This eliminates the need for the operator to consider the correction of the amount of movement of the table caused by the movement of the grindstone table when indexing the table to the contact point between the sizing device and the reference end surface of the work. There is no need to consider the correction of the amount of table movement that occurs, and there is an effect that NC programs can be easily created.

[Brief description of the drawings]

FIG. 1 is a plan view of an angular grinding machine with a control circuit added thereto, and FIG. 2 shows a command value calculation process required for determining a table position for positioning at a sizing position of an end face sizing device. FIG. 3 is a flow chart, FIG. 3 is an explanatory diagram for determining an end face sizing device, and FIG. 4 is an explanatory diagram showing indexing of an end face sizing device of a conventional device. 21… table, 25… headstock, 26… tailstock, 27…
Grinding wheel head, 32 ... End face sizing device, W ... Work, Wp ... Work reference plane.

Claims (1)

(57) [Scope of request for utility model registration] 1. An angle slide grindstone head that moves along a straight path intersecting at an acute angle .theta. With respect to a center line of a work supported on a headstock and a tailstock mounted on a table. A sizing command for instructing a sizing command value that is a distance from a work reference position to a contact point of the end face sizing device and a reference plane of the work on a center line of the work. Command value command means, and an end face sizing command for instructing an end face sizing use position, which is a contact point between a reference end face of the work and a contact of the sizing device, as an end face sizing use value in a direction orthogonal to the center line of the work A use position commanding means, a correction value calculating means for calculating a correction value in a direction parallel to the center line of the work based on the end face sizing use value and the acute angle θ, and a command issued by the sizing command value commanding means. Sizing command value and the correction value Target command position calculating means for calculating a target command position based on the correction value calculated by the calculating means, and movement control means for moving the table to the target command position calculated by the target command position calculating means. A control device for an end face sizing device.