JP2017087364A - Method for working end face portion shape by cylindrical grinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To subject a three-dimensional surface shape that is not concentric circular to the center of a workpiece to a grind work on a work end face using a cylindrical grinder.MEANS FOR SOLVING THE PROBLEM: A working method by a wheel spindle stock 4 that moves a rotating grinding wheel 5 in an X direction, a main spindle 10 that rotates a workpiece W, and cylindrical grinders 1, 100 and 200 that change a relative position between the main spindle 10 and the grinding wheel 5 in a Z direction orthogonal to the X direction includes: specifying a cut depth Zs to an end face of the workpiece W corresponding to a rotational phase while the workpiece W supported by the main spindle 10 is revolved once according to a finished shape of a workpiece end face Ws and performing synchronous control so that the grinding wheel 5 relatively moves according to a cut depth specified to correspond to the rotational phase; and thereby cutting the end face of the workpiece.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for processing an end face shape by a cylindrical grinder.

Some cylindrical grinding machines can perform grinding with an angle between a grindstone shaft and a rotating shaft of a workpiece that are in a parallel positional relationship. For example, Patent Document 1 discloses an apparatus that has a mechanism for turning a table supporting a workpiece around a vertical axis and performs taper grinding of a cylindrical portion.

JP 2000-79543 A

In the cylindrical grinder, when an arbitrary shape is formed on the work end surface, the grindstone side is formed in a reverse shape with respect to the desired arbitrary shape, and the reverse shape is transferred to the work end surface. As a result, it is possible to form a funnel-like shape that is concentrically concave toward the center of the workpiece, or an umbrella-like shape that is concentrically convex toward the center of the workpiece.

On the other hand, it is not possible to form a non-target shape such as an oblique cut of a cylinder or a three-dimensional surface shape having a concavo-convex surface that does not have a concentric shape such as a corrugated shape with respect to the workpiece end surface. In order to form such a three-dimensional surface shape, a cutting machine having a three-dimensional moving system is generally used.

However, in the cutting machine, the surface after processing is in a state of being scratched in order to obtain the target three-dimensional shape while the tip of the cutting tool is thrust against the work and tears the work surface by rotation. On the other hand, in the cylindrical grinder, since the grindstone which grinds while crushing the workpiece surface is used, the grinding surface is smoother than the cutting machine.

An object of the present invention is to provide a method for processing the shape of an end surface portion of a cylindrical grinder that grinds a three-dimensional surface shape having concavities and convexities that are not concentric toward the center of the workpiece with respect to the workpiece end surface. .

In the processing method of the end face part shape by the cylindrical grinding machine of the present invention for solving the above-mentioned problem, a grindstone base for moving a rotating grindstone in the X direction, a main shaft for supporting and rotating the workpiece, and orthogonal to the X direction In a processing method by a cylindrical grinder that performs grinding by changing the relative position of the spindle and the grindstone in the Z direction,
Based on the finished shape of the workpiece end surface, corresponding to the rotation phase during one rotation of the workpiece supported by the spindle, specify the depth of cut into the workpiece end surface,
Based on the cutting depth designated corresponding to the rotation phase, the workpiece is cut into the workpiece end surface by performing synchronous control so that the grindstone moves relative to the rotating workpiece. And

According to the present invention, using a cylindrical grinder, a three-dimensional surface having a non-concentric surface such as an asymmetric shape such as a cylinder cut obliquely or a wavy shape with respect to a workpiece end surface. It becomes possible to shape the shape. On the other hand, although it is the formation of a three-dimensional surface, the control system is not a three-dimensional coordinate control system, and in addition to the rotational phase of the workpiece, the grindstone is relatively moved back and forth in the X direction with respect to the workpiece, or It can be realized by two-axis synchronous control that swings the rotating shaft of the main shaft, swings the rotating shaft of the grindstone, or moves the grindstone relative to the workpiece in the Z direction.

It is a top view of a cylindrical grinder. It is a figure which shows the principle of the grinding process by Example 1. FIG. It is a figure which shows the grinding example in case the grindstone 5 reciprocates only once, while the workpiece | work W makes one rotation. It is a figure which shows the example of grinding when the grindstone 5 reciprocates only twice while the workpiece | work W makes one rotation. It is a flowchart explaining the operation | movement at the time of grinding the workpiece | work W. FIG. It is a top view of another cylindrical grinder. It is a top view of another cylindrical grinding machine. It is a figure which shows the principle which grinds by rocking the said rotating shaft, while the rotating shaft of a main axis | shaft makes one rotation. It is a figure explaining the operation | movement at the time of grinding the workpiece | work W in Example 2. FIG. FIG. 6 is a diagram illustrating the principle of grinding according to a third embodiment. It is a figure which shows the principle of the grinding process by Example 4. FIG.

Hereinafter, although the processing method of the end face part shape of the cylindrical grinding machine of the present invention will be described, in these examples, while the cylindrical workpiece rotates once, in the direction of the rotation axis of the main shaft supporting the workpiece, Cutting is performed by moving the grindstone relative to the workpiece to obtain irregularities of the desired depth. At that time, the target depth is specified in the rotation phase during one rotation of the rotation axis of the main shaft. Here, the rotation phase means which rotation angle is present while the rotation axis of the main shaft makes one rotation. For example, a 1/4 rotation position, a 1/2 rotation position, etc. are said.

How the target depth specified for the rotation phase of the rotation axis of the main shaft is used for controlling the moving system of the cylindrical grinder differs in each embodiment. Example 1 is an example in the case where the cutting direction of the grindstone is inclined with respect to the rotation axis of the main shaft. The target depth to be cut is converted into the amount of movement in the X direction of the grindstone, and the main shaft is integrated. While rotating, the grindstone is moved back and forth in the X direction. In the second embodiment, the rotation axis of the main shaft is swung while the main shaft is rotated once, and the target depth to be cut is converted into the swing angle of the main shaft rotation shaft. In the third embodiment, the rotating shaft of the grindstone is swung while the rotating shaft of the main shaft rotates once, and the target depth to be cut is converted into the rocking angle of the grindstone rotating shaft. In the fourth embodiment, the workpiece is moved left and right in the direction of the rotation axis of the main shaft while the main shaft rotates once, and the target depth to be cut corresponds to the movement amount of the left and right movement of the workpiece. I am letting. In addition, in the example in which the movement relationship between the workpiece and the grindstone is a straight line, it is sufficient if the relative position between the workpiece and the grindstone varies linearly.

In FIG. 1, a lower table 3 a, an upper table 3 b, and a grindstone table 4 are provided on a bed 2 of the cylindrical grinding machine 1. The grindstone table 4 supports a grindstone 5 that is rotated about the rotation axis Ct, and linearly moves on the guide surface 7 of the bed 2 with the direction orthogonal to the rotation axis Ct (the X direction in the figure) as the cutting direction of the grindstone. Moving.

A headstock 8 and a tailstock 9 are mounted on the upper table 3b. A spindle 10 is provided on the spindle stock 8, and a tailstock 11 is provided on the tailstock 9. The cylindrical workpiece W is supported by being sandwiched between the spindle 10 and the tailstock 11 or supported by a chuck provided on the spindle 10, and the workpiece W is rotated by the spindle motor 12.

The lower table 3a is reciprocated along the guide surface 14 laid in the Z direction orthogonal to the X direction on the bed 2 by the table feed servo motor 15, and changes the relative position in the Z direction with the grindstone. The upper table 3b can be rotated around the vertical axis with respect to the lower table 3a. For this reason, grinding can be performed with an angle between the rotation axis Ct of the grindstone 5 and the rotation axis Cm of the main shaft 10 in a parallel positional relationship. The first embodiment can also be applied to a cylindrical grinder that employs a mechanism that moves the grindstone table 4 in the Z direction instead of the mechanism that moves the lower table 3a in the Z direction.

FIG. 2 is a diagram illustrating the principle of grinding according to the present embodiment. The rotation axis Cm of the main shaft 10 is normally at a position parallel to the rotation axis Ct of the grindstone 5, but in the drawing, the rotation axis Cm intersects the parallel position by an acute angle α. Further, while the workpiece W is being ground, it is fixed without changing the angle α, and is not moved in the Z direction. While the workpiece W makes one rotation around the rotation axis Cm, the grindstone 5 reciprocates relative to the workpiece W in the X direction between the outer peripheral side b point and the inner peripheral side a point of the end surface Ws of the workpiece W. Let Xd be the amount of movement. In addition, although the workpiece | work W assumes the shape which has the disk W2 on the concentric circle | round | yen of the cylinder W1, and the end surface Ws which performs grinding assumes the surface of the disk w2, it is not restricted to this.

The distance between the surface Ws of the workpiece W and the surface Ts of the grindstone 5 during this time is calculated as follows. The surface Ws of the workpiece W and the surface Ts of the grindstone 5 are parallel surfaces for easy calculation.

The surface Ts of the grindstone 5 approaches the end surface Ws of the workpiece W by Zs from the outer peripheral side b point to the inner peripheral side a point. Where Zs is

Zs = Xd × sin α

It is. That is, when the grindstone 5 is moved in the X direction by the movement amount Xd due to the presence of the angle α between the rotation axis Ct of the grindstone 5 and the rotation axis Cm of the main shaft 10, only Zs is formed in the depth direction of the end face of the workpiece W. Can be cut.

FIG. 3 is an example of grinding when the grindstone 5 reciprocates once in the X direction relative to the workpiece W while the workpiece W rotates once. In this reciprocation process, FIG. 3A shows a state where the grindstone 5 is at a position farthest from the rotation axis Cm, and FIG. 3B shows a state where the grindstone 5 is rotated 180 degrees and is closest to the rotation axis Cm. In the figure, ◯ and X indicate positions on the outer periphery of the workpiece W.

In FIG. 3A, the grindstone 5 cuts the end surface Ws of the workpiece W thinly, whereas in FIG. 3B, it cuts deeply. Synchronous control is performed so that the position of the grindstone 5 is moved with respect to the rotational phase of the rotating workpiece W. When this grinding process is completed, as shown in FIG. 3C, a shape in which the cylinder is cut obliquely from the top to the bottom in the drawing can be formed with respect to the end surface Ws of the workpiece W. FIG. 3D shows a range cut by the grindstone 5 on the end surface Ws of the workpiece W. At the position P0, the shaved range is close to the outer peripheral side, and the amount of shaving is small. On the other hand, the position P1 is approaching the inner peripheral side, and the amount of cutting is increased. If the rotational phase of the position P0 is the initial rotational phase (rotation start position), the rotational phase of the position P1 is a position with an angle of 180 degrees that is a half rotation.

FIG. 4 is an example of grinding when the grindstone 5 reciprocates relative to the workpiece W only twice while the workpiece W rotates once. The grinding surface of the grindstone 5 is not parallel to the end surface Ws of the workpiece W but has an angle θ. In this reciprocation process, FIGS. 4A and 4C show a state in which the grindstone 5 is at a position farthest from the rotation axis Cm, and FIGS. ing. In the figure, ◯, Δ, × and □ indicate positions on the outer periphery of the workpiece W.

4A and 4C, the grindstone 5 cuts the end face Ws of the workpiece W thinly, whereas in FIGS. 4B and 4D, it cuts deeply. As in the previous example, synchronous control is performed so that the position of the grindstone 5 moves with respect to the rotational phase of the rotating workpiece W. When the grinding process is completed, as shown in FIG. 4E, a shape like “Okesa-shade” can be formed on the end surface Ws of the workpiece W. FIG. 4F shows a range cut by the grindstone 5 on the end surface Ws of the workpiece W. At the positions P2 and P4, the shaved range is close to the outer peripheral side, and the amount of shaving is small. On the other hand, the positions P3 and P5 approach the inner peripheral side, and the amount of cutting is increased. If the rotational phase of the position P2 is the initial rotational phase (rotation start position), the rotational phase of the position P3 is a position rotated by an angle of 90 degrees, the rotational phase of the position P4 is a position rotated by 180 degrees, and the rotational phase of the position P5 is 270. It is a position rotated by degrees.

Hereafter, the operation | movement at the time of grinding the workpiece | work W in said structure is demonstrated using FIG. The workpiece W has a shape having a disc W2 on a concentric circle of the cylinder W1. On the other hand, what kind of grinding surface is used for the grindstone is determined. When the grindstone is cut, the shape of the ground surface is transferred to the workpiece W. The operator supports the workpiece W with the spindle 10 and the tailstock 11, and turns the table 3b on the table 3a by an angle α.

Next, an operator determines the origin coordinate of the grindstone 5 with respect to the end surface Ws of the workpiece | work W by manual operation (step S1). Identification of the origin coordinates is performed using a known technique used in taper grinding. For example, a measuring device (not shown) fixed in the same body as the grinding wheel base 4 can be used. Such a measuring apparatus has a thin rod-shaped contact terminal, and when the grindstone base 4 is moved, the contact terminal moves in a body shape and contacts the end surface Ws, using the coordinates at the time of contact. The origin coordinates are specified and stored in the cylindrical grinding machine 1.

Next, in step S2, the operator turns the cylindrical grinding machine 1 on a specific rotational phase (for example, the workpiece W is rotated by 0 degrees and 180 degrees on the rotation axis Cm) based on the finished shape of the end face Ws of the workpiece W. The target depth Zs is input as a machining allowance for the selected position. Zs is a distance in the length direction of the rotation axis Cm inclined by the angle α. Zs is also a machining allowance on the outer periphery of the disk W2. Furthermore, it is assumed that the diameter D of the disk W2 is set in advance.

In step S <b> 3, the cylindrical grinding machine 1 complements the machining allowance at each rotational phase based on the input machining allowance for the specific rotational phase. Various supplemental curves can be selected. In step S2, when the target depth Zs is input by an expression using the rotation phase as a variable, in step S3, a machining allowance for each rotation phase is obtained by the expression. In step S4, the cylindrical grinding machine 1 further converts the position of the grindstone 5 in the X direction where the calculated machining allowance is obtained for each rotational phase.

In the next step S5, the cylindrical grinding machine 1 starts rotating the workpiece W and rotating the grindstone 5. The grindstone 5 is moved relative to the workpiece W at a predetermined speed. In step S6, the cylindrical grinding machine 1 moves the grindstone 5 backward by the distance in the X direction converted according to the rotation phase of the rotation axis Cm. That is, the grindstone 5 reciprocates once or a plurality of times while the workpiece W makes one rotation around the rotation axis Cm. As a result, grinding for the input machining allowance is performed.
Finally, in step S7, the work W and the grindstone 5 are separated from each other, the rotation of the work W and the grindstone 5 are stopped, and the process is terminated.

As described above, according to the cylindrical grinding machine 1, any shape is impossible. However, the cylindrical grinding machine 1 has a non-target shape obtained by obliquely cutting the cylinder with respect to the end surface Ws of the workpiece W, or a concentric circle such as an okeyasa. It becomes possible to form a three-dimensional shape that does not become a shape.

Moreover, since the grindstone 5 cuts while crushing the end surface Ws of the workpiece W, a smooth surface can be formed as compared with a cutting machine.

The workpiece W thus ground can be used for molding a die punch, a valve body of a nozzle, an eccentric pin having a minute angle on an end surface, or the like. In particular, in the state of a finished product, it is desirable to process the workpiece W having an area where processing such as a so-called center hole, such as a center hole, is avoided at the center of the end face Ws.

In the cylindrical grinding machine 1 of the above embodiment, the upper table 3b on which the headstock 8 and the tailstock 9 are mounted is rotated with respect to the lower table 3a, but only the headstock 8 is rotated. May be. FIG. 6 shows such a cylindrical grinding machine 100. The workpiece W is cantilevered by the main shaft 10 and is held in a state where a predetermined angle is given to the rotation shaft of the grindstone 5. The cylindrical grinding machine 100 is different from the cylindrical grinding machine 1 in that the cylindrical grinding machine 100 has a table 3 movable in the Z direction instead of the lower table 3a and the upper table 3b in the cylindrical grinding machine 1. Are the same, and corresponding portions are denoted by the same reference numerals.

On the other hand, like the cylindrical grinder 200 shown in FIG. 7, the grindstone table 4 and the guide surface 7 are placed on the rotary table 6 whose rotation center is Ot, and the rotary table 6 is rotated around the rotation center Ot at an arbitrary position. Thus, an angle may be provided between the rotation axes Ct and Cm. In the cylindrical grinding machine 100, only the workpiece W is cantilevered, and the cylindrical grinding machine 200 is different in that the rotating side is the grinding wheel base 4 side rotated by the rotary table 6, and the operation is as follows. The operation is exactly the same as that shown in FIG. The cylindrical grinder 200 is further different from the cylindrical grinder 1 in that the cylindrical grinder 200 includes a table 3 that can move in the Z direction instead of the lower table 3a and the upper table 3b. The configuration is the same, and corresponding parts are denoted by the same reference numerals.

In the above embodiment, the grindstone 5 is moved in the X direction according to the rotation phase of the rotation axis Cm. However, the grindstone 5 is not moved in the X direction but rotated while the rotation axis Cm is rotated once. The axis Cm may be changed to an operation of swinging in the XZ plane (a plane formed by two axes in the X direction and the Z direction, which is a horizontal plane in the embodiment).

In the cylindrical grinding machines 1 and 100 shown in FIGS. 1 and 6, FIG. 8 is a diagram showing the principle of performing the grinding process by swinging the rotation axis Cm while the rotation axis Cm is rotated once. In FIG. 8A, the rotation axis Cm of the main shaft 10 is in a state parallel to the rotation axis Ct of the grindstone 5. FIG. 8B shows a state in which the rotation axis Cm of the main shaft 10 is tilted from this parallel position by an angle α about the rotation center Om. While the workpiece W is being ground, the workpiece W is not moved in the Z direction. Further, the grindstone 5 does not move in the X direction. For convenience of explanation, in the figure, the rotation center Om is one point on the rotation axis Cm. However, the rotation center Om is not necessarily on the rotation axis Cm, and may be at an arbitrary position.

The depth Zs at which the surface KM of the grindstone 5 cuts into the outermost surface Ws of the workpiece W is the distance L from the rotation center Om to the grinding surface of the grindstone 5 (in this example, the distance between the rotation center Om and the end face Ws) The value depends on the tilted angle α using the diameter D of the disc W2 (see FIG. 8B). When the grinding process is completed, as shown in FIG. 8C, a shape in which the cylinder is obliquely cut from the top to the bottom in the drawing can be formed with respect to the end surface of the workpiece W. FIG. 8D shows a range cut by the grindstone 5 on the end surface of the workpiece W. FIG. At the position P6, the grindstone 5 is close to the inner peripheral side, but the workpiece W and the grindstone 5 are in a parallel position, and the amount of cutting is small. On the other hand, the position P7 is approaching the outer peripheral side, but since the workpiece W and the grindstone 5 intersect with each other at an angle, the amount of cutting is increased.
As described above, when the angle α between the rotation axis Ct of the grindstone 5 and the rotation axis Cm of the main shaft 10 is changed while the rotation axis Cm is rotated once, the grindstone 5 is relatively moved with respect to the workpiece W. The workpiece W can be cut in the depth direction of the end surface.

Hereinafter, the operation of the cylindrical grinding machines 1 and 100 when grinding the workpiece W in the above configuration will be described with reference to FIG. The workpiece W has a shape having a disc W2 on a concentric circle of the column W1, as in the previous embodiment.

An operator determines the origin coordinate of the grindstone 5 with respect to the end surface Ws of the workpiece W by manual operation (step S11). Next, based on the finished shape of the end face Ws of the workpiece W, the operator gives the cylindrical grinders 1 and 100 a machining allowance for a specific rotational phase (for example, 0 degrees or 180 degrees) on the rotational axis Cm of the main shaft 10. The depth Zs is input as (step S12).
In step S13, the machining allowance at each rotation phase is complementarily calculated based on the input machining allowance for the specific rotation phase. Various supplemental curves can be selected. In step S12, when the target depth Zs is input by an equation using the rotational phase as a variable, in step S13, the depth Zs for each rotational phase is obtained by the equation. In step 14, the cylindrical grinders 1 and 100 further use the distance L between the rotation center Om and the grinding surface of the grindstone 5 and the diameter of the disc W2 to obtain the depth Zs obtained for each rotation phase. Is converted into a swing angle α.

In the next step S15, rotation of the workpiece W and rotation of the grindstone 5 are started, and the grindstone 5 is moved relative to the workpiece W at a predetermined speed. In step S16, the rotation axis Cm is swung so that the angle α converted according to the angle of the rotation axis Cm is obtained. That is, while the workpiece W makes one rotation around the rotation axis Cm, the rotation axis Cm swings once or a plurality of times. As a result, grinding for the input machining allowance is performed.
Finally, in step S17, the work W and the grindstone 5 are separated from each other, the rotation of the work W and the grindstone 5 are stopped, and the process is terminated.

In the cylindrical grinder 1 of FIG. 1, the position of the rotation center Om of the rotation axis Cm is on the opposite side of the grindstone 5 in the cylindrical grinder 100, but the principle of cutting the target depth Zs with respect to the workpiece W is as follows. The same as in the case of the cylindrical grinding machine 100.

In the cylindrical grinding machine 200 shown in FIG. 7, the end surface Ws of the workpiece W can be similarly ground in an uneven shape by swinging the rotational axis Ct of the grindstone 5 while the rotational axis Cm rotates once. FIG. 10 shows the principle. The point that the target depth to be cut is specified corresponding to the phase during one rotation around the rotation axis Cm of the main shaft 10 is the same as in the previous embodiment. In the present embodiment, the target depth Zs is converted into the rocking angle β of the grindstone rotating shaft.

By turning the rotary table 6 to the rotation center Ot, it is possible to give the workpiece W a depth Zs. Based on the distance h from Ot to the grinding tip KS of the grindstone 5, the depth Zs is converted into a swing angle β. Accordingly, if the rotary table 6 is swung to the rotation center Ot while the rotation axis Cm rotates once, the grindstone 5 cuts into the end surface Ws of the workpiece W relative to the workpiece W, and is ground into an uneven shape. It can be done. The rotation center Ot is an arbitrary point.

In the above-described embodiment, the grindstone 5 is moved back and forth in the X direction according to the rotational phase of the rotating shaft Cm, or the rotating shaft Cm is swung or the rotating shaft Ct is swung so as to have irregularities. The end face Ws of the workpiece W was processed on a three-dimensional surface. On the other hand, in this embodiment, as shown in FIG. 11, the angle in the direction of the rotation axis Cm with respect to the X direction is fixed (90 degrees in this example), and the position of the grindstone 5 in the X direction is fixed, The relative position of the workpiece W and the grindstone 5 is moved left and right in the Z direction according to the rotation phase of the rotation axis Cm. The target depth to be cut is made to correspond to the amount of movement of the workpiece W in the Z direction with respect to a specific phase during one rotation around the rotation axis Cm of the main shaft 10.

DESCRIPTION OF SYMBOLS 1 Cylindrical grinder 2 Bed 3 Table 4 Grinding wheel stand 5 Grinding wheel 6 Rotary table 7 Guide surface 8 Main stand 10 Spindle 11 Tailstock 14 Guide surface W Workpiece W1 Column W2 Disk Ws End surface Ct, Cm Rotation shaft

Claims (5)

By a grinding wheel base that moves a rotating grindstone in the X direction, a main shaft that supports and rotates a workpiece, and a cylindrical grinder that performs grinding by changing the relative position of the main shaft and the grindstone in the Z direction orthogonal to the X direction In the processing method,
Based on the finished shape of the workpiece end surface, corresponding to the rotation phase during one rotation of the workpiece supported by the spindle, specify the depth of cut into the workpiece end surface,
Based on the cutting depth designated corresponding to the rotation phase, the workpiece is cut into the workpiece end surface by performing synchronous control so that the grindstone moves relative to the rotating workpiece. An end face shape processing method using a cylindrical grinder.
The angle of rotation of the grindstone and the axis of rotation of the main shaft intersecting with an acute angle α is fixed,
Rotating the spindle in a state where the workpiece does not move relative to the grindstone in the Z direction,
The cutting depth designated corresponding to the rotation phase during one rotation of the workpiece is converted into the movement amount in the X direction of the grindstone using the angle α,
2. The method of processing an end face portion shape by a cylindrical grinder according to claim 1, wherein the work end face is cut in a direction of a rotation axis of the main shaft by relatively moving the grindstone by the converted movement amount.
The grindstone is rotated in a state where the grindstone is not cut and moved by the grindstone table,
The spindle is rotated in a state where the workpiece does not move relative to the grindstone in the Z direction,
The rotation axis of the main shaft can be swung in the XZ plane around an arbitrary point,
The incision depth designated corresponding to the rotation phase during one rotation of the workpiece is determined by using the distance between the arbitrary one point and the grinding surface of the grindstone as the swing angle α of the main shaft with respect to the rotation axis. Converted to
2. The workpiece end surface is cut in the direction of the rotation axis of the main shaft by swinging the rotation shaft of the main shaft in the XZ plane around the one point with the converted angle α. Method of processing the end face shape with a cylindrical grinding machine.
The grindstone is rotated in a state where the grindstone is not cut and moved by the grindstone table,
The spindle is rotated in a state where the workpiece does not move relative to the grindstone in the Z direction,
The grindstone can be swung around an arbitrary point,
The incision depth designated corresponding to the rotation phase during one rotation of the workpiece is converted into a rocking angle β with respect to the grindstone using the distance from the arbitrary one point to the grinding tip of the grindstone,
The end face by a cylindrical grinder according to claim 1, wherein the work end face is cut in the direction of the rotation axis of the main shaft by swinging the grindstone about the arbitrary one point with the converted angle β. Machining method of part shape.
Fixing the angle of the direction of the rotation axis Cm with respect to the X direction, and fixing the grindstone in the X direction;
Relative movement of the grindstone and the workpiece in the Z direction based on a cutting depth designated corresponding to the rotational phase causes the workpiece end surface to be cut in the direction of the rotation axis of the main shaft. The processing method of the end surface part shape by the cylindrical grinding machine of Claim 1 characterized by the above-mentioned.