JP2779742B2 - Both ends processing method of cylindrical work - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic cylindrical member made of a magnetic metal, in which coating films made of a non-magnetic material are formed at least on both ends in the axial direction. X perpendicular to Z axis and Z axis
The present invention relates to a method for processing both ends of a cylindrical work for processing with a pair of cutting tools each capable of moving in the axial direction.

[0002]

2. Description of the Related Art Conventionally, in a rotating electric machine such as an engine generator, for example, a fixed iron core as a component of a stator sandwiched between a pair of brackets has a cylindrical shape formed by laminating a number of ring-shaped iron core plates made of magnetic metal. The surface of the magnetic cylindrical member formed on the surface is coated with a powder of a synthetic resin, the outer peripheral edge of both ends of the fixed iron core,
Step portions for fitting the brackets on both sides are provided respectively. In order to obtain these steps, a pair of blades is fixed to the fixed core while holding the fixed core rotatably around the axis with the coating film surface at one end abutting the reference surface. In the direction along the axis, as well as in the direction perpendicular to the axis, respectively, so that the outer peripheral edges of both ends of the magnetic cylindrical member are processed with their cutting tools so as to remove a part of the coating film at both ends. I have.

[0003]

However, the coating film made of synthetic resin at both ends of the fixed iron core is, for example, 0.3 to 0.8 m.
m, and it is difficult to make the coating thickness uniform at both ends of the fixed iron core. For this reason, when the stepped portion is processed by abutting the surface of the coating film at one end against the reference surface as in the above-described conventional case, the coating film thickness at both ends of the fixed iron core is not uniform. Due to this, the processing dimensions along the axis of the magnetic cylindrical member at both axial ends of the fixed core may be different, and even if the coating thickness is uniform, the axial length of the magnetic cylindrical member When the value changes, the processing dimensions also vary.

[0004] The present invention has been made in view of such circumstances, and despite the uneven coating film thickness and the change in the axial length of the magnetic cylindrical member, processing along the axial direction of the magnetic cylindrical member. It is an object of the present invention to provide a method for processing both ends of a cylindrical work, which can be processed so that dimensions are equal at both ends.

[0005]

To achieve the above object, according to the present invention, a reference position is set on a Z-axis and a work having an axis disposed on the Z-axis is rotated about the axis. A pair of proximity sensors that can freely detect and detect that the magnetic material has approached a certain detection distance and have a constant relative position along the Z-axis direction with the two blades. A magnetic cylindrical member that detects both axial end faces and that is based on a distance along the Z-axis from the reference position to both proximity sensors at the time of the detection and a constant detection distance along the Z-axis by both the detection sensors. The center position along the Z-axis direction is set, and the movement amount along the Z-axis direction of both the cutting tools is determined based on the center position, and the movement amount along the X-axis direction of the both cutting tools is determined based on the rotation center of the work. .

[0006]

An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 1 to 8 show one embodiment of the present invention. FIG. 1 is a longitudinal sectional side view of a rotary electric machine showing a main part in an enlarged state, and FIG. 2 is a front view of a processing apparatus before processing a workpiece. FIG. 3 is a front view of the processing apparatus in a processing state, and FIG.
5 is an enlarged view of the right part of FIG. 5, FIG. 5 is a view taken in the direction of arrow 5 in FIG. 4, FIG. 6 is a sectional view taken along line 6-6 of FIG.
FIG. 8 is a longitudinal sectional view showing a state where both end faces of the work are detected.

First, in FIG. 1, a casing 10 of a rotating electrical machine includes a stator 13 between a pair of brackets 11 and 12.
The fixed iron core 14 is a component made of a synthetic resin such as an epoxy resin on the surface of a magnetic cylindrical member 15 formed by laminating a number of ring-shaped thin plates made of a magnetic metal. The coating film 16 is formed by powder coating. That is, the stepped portion 17 is provided at the outer peripheral edges of both ends in the axial direction of the fixed iron core 14.
18 are provided, and the brackets 11 and 12 fitted to the steps 17 and 18 are connected to the plurality of connecting bolts 1.
The casing 10 is configured by being fastened through the joints 9.

The fixed iron core 14 in which the coating film 16 is formed on the surface of the magnetic cylindrical member 15 is used as a workpiece in the processing method of the present invention.
The outer peripheral edges of both ends in the axial direction of the fixed core 14 are machined according to the method of the present invention, whereby step portions 17 and 18 are obtained.

In FIGS. 2 and 3, the machining device used for machining the fixed iron core 14 as a workpiece is a so-called NC lathe, which comprises a fixed base 20 and a fixed iron core 14 having a vertical axis. A chuck mechanism 21 provided on the base 20 so as to be rotatable and a pair of elevating tables 22 ₁ , 22 arranged on both sides of the chuck mechanism 21 to enable movement in the X-axis direction along the axis of the fixed iron core 14; 22
₂ and a direction that approaches and separates from the fixed iron core 14 held by the chuck mechanism 21, that is, X that is orthogonal to the Z axis.
A pair of horizontal movable table 23 ₁ is respectively supported on the lifting platform 22 _1, 22 ₂ as movable in the axial direction, and 23 ₂ are fixed to the horizontal movable table 23 ₁ in order to process the lower axial end of the fixed iron core 14 the blade 24 _1, the cutting tool is fixed to the horizontal moving table 23 ₂ in order to process the upper axial end of the fixed iron core 14 24
_2, the proximity sensor 25 ₁ attached to the horizontal moving table 23 ₁ as allow relative movement to the X-axis direction to detect a lower end surface of the magnetic cylindrical member 15 in the fixed iron core 14, the magnetic cylindrical member in the fixed iron core 14 and a proximity sensor 25 ₂ which is fixed to the horizontal moving table 23 ₂ to detect the upper end surface 15.

The chuck mechanism 21 includes a mounting portion 26 on which the fixed iron core 14 having an axis extending along the Z-axis direction (vertical direction) is mounted, and a plurality of chuck claws protruding upward from the mounting portion 26. 27 are supporting frames 28 erected on the base 20.
Is rotatably supported on the vertical axis at the top of the
The chuck claws 27... Operate while expanding into the fixed iron core 14 placed on the mounting portion 26 to abut on the inner periphery of the fixed iron core 14, thereby causing the fixed iron core 14 to move vertically. Rotation around the axis can be maintained as possible.

On the other hand, a chuck claw 2 is provided below the base 20.
7 are provided with a chuck driving mechanism 29 for causing the diameter of the mounting member 7 to increase or decrease.
6 and chuck claws 27..., That is, a rotation drive mechanism 31 including a motor 30 for rotating the fixed iron core 14 about the Z axis.

Above the chuck mechanism 21, a holding member 33 for securely holding the fixed core 14 in cooperation with the chuck mechanism 21 is provided at the upper end of the fixed core 14 held by the chuck mechanism 21. It is arranged movably in the vertical direction, that is, in the Z-axis direction, so as to be able to be pressed against. The pressing member 33 is provided at a lower end of a shaft 34 extending in the Z-axis direction, and a base end of the shaft 34 is supported by a movable frame 35 movable in the Z-axis direction so as to be rotatable around the axis. The movable frame 35 is supported by the support plate 36 erected on the base 20 so as to be movable in the Z-axis direction. The movable plate 35 is driven by the support plate 36 in the Z-axis direction. Is fixedly supported.

In FIG. 4, 5 and 6, on the base 20 in the right chuck mechanism 21 is pillar 38 ₁ is erected, the lift as possible movement in the Z axis direction to the support column 38 ₁ pedestal 22 ₁ is supported. That is, a vertically extending guide member 40 ₁ having a pair of guide grooves 39, 39 on both sides is fixedly provided on the column 38 ₁ , and the lift base 22 ₁
Is movable up and down along the guide member 40 _1.

[0015] The upper portion of the strut 38 _first servo motor 41 ₁ having an axis along the Z-axis is fixedly supported. on the other hand,
The guide member 40 ₁ and the lower end of the screw shaft 42 ₁ extending vertically is rotatably supported, an upper end of the screw shaft 42 ₁ is connected to the servo motor 41 ₁ of the output shaft. The screw shaft 42 ₁ Thus is coupled to the lifting platform 22 ₁ via the ball screw mechanism 43 _1. Therefore, the servo motor 41 ₁
Elevating stage 22 ₁ will move lifting i.e. in the Z-axis direction in accordance with the operation.

The lift base 22 ₁ is provided with a pair of guide rails 45 ₁ , 45 ₁ extending in the X-axis direction, and the horizontal moving base 23 ₁ is moved in the X-axis direction by the guide rails 45 ₁ , 45 _1. Will be guided. Thus a manner elevating stage 22 _1, together with the servo motor 46 ₁ having an axis along the X-axis direction are fixedly supported, the screw shaft 47 ₁ having an axis along the X-axis direction is rotatably about the axis are supported, at one end of the screw shaft 47 _1, a servo motor 46 ₁ is connected via a transmission mechanism 49 ₁ including a transmission belt 48 _1. Moreover the screw shaft 47 ₁ is coupled to the horizontal moving table 23 ₁ via the ball screw mechanism 50 _1. Therefore the horizontal moving table 23 ₁ moves to the horizontal movement or X-axis direction in response to actuation of the servo motor 46 _1.

The blade 24 ₁ is fixed to the chuck mechanism 21 side lower horizontal moving table 23 ₁ in order to process the lower end of the fixed iron core 14 in the state of being held by the chuck mechanism 21. The proximity sensor 25 ₁ is one capable of detecting that the magnetic material has approached to a certain detection distance, said at a position a constant relative position along the Z-axis direction between the blade 24 _1, horizontal movement stage 23 ₁ is provided to enable relative movement along the X-axis direction. That is, the horizontal moving table 23 _1, a cylinder 51 having an axis along the X-axis direction is fixedly attached to the piston rod 51a in the cylinder 51
Proximity sensor 25 ₁ is fixed to the tip of. Cylinder 51 Thus, although the time of detection by the proximity sensor 25 ₁ is intended to project a proximity sensor 25 ₁ and extending action forward along the X axis, blade 24 ₁ by the processing time of the proximity sensor 25 ₁ by reducing operation to Is retracted rearward along the X-axis.

[0018] In FIG. 7, is on the base 20 in the left chuck mechanism 21 has support column 38 ₂ is erected, the lifting platform 2
2 ₂ is guided to move in the Z-axis direction by a guide member 40 ₂ provided on the support column 38 _2. The lifting platform 2 screw shaft 42 ₂ connected to the servo motor 41 ₂ which is fixedly supported on the top of the column 38 ₂ through a ball screw mechanism 43 ₂
2 ₂ , and the elevator 22 ₂ moves in the Z-axis direction according to the operation of the servo motor 41 ₂ .

Horizontal moving table 23_TwoExtends in the X-axis direction and rises
Platform 22_TwoA pair of guide rails 45 provided on_Two, 4
5_TwoGuides the movement in the X-axis direction.
Platform 22_TwoServomotor 46 fixedly supported by
_TwoBut the transmission belt 48_TwoTransmission mechanism 49 including_TwoThrough
Screw shaft 47_TwoAnd the screw shaft 47_TwoIs a ball screw
Mechanism 50_TwoMoving table 23 through_TwoLinked to I
Therefore, the servo motor 46 _TwoHorizontal carriage according to the operation of
23_TwoMoves in the X-axis direction.

The blade 24 ₂ is fixed to the horizontal moving table 23 _second chuck mechanism 21 side upper in order to process the upper end of the fixed iron core 14 in the state of being held by the chuck mechanism 21. The proximity sensor 25 ₂ are those capable of detecting that the magnetic material has approached to a certain detection distance, at a position a constant relative position along the Z-axis direction of the cutting tool 24 _2, blade 24
It is fixed to the lower portion of the horizontal moving table 23 ₂ in the rear side along the X-axis than _2.

With such a processing apparatus, the fixed iron core 14
In processing the steps 17, 18 (see FIG. 1) at the outer peripheral edges of both ends of the chuck mechanism 2 as shown in FIG.
1 and fixed iron core 14 by the pressing member 33 while holding the rotatable around an axis along the Z axis, the other proximity sensors 25 ₂ causes close to the lower end of the fixed iron core 14 to one of the proximity sensors 25 ₁ from below It is made to approach the upper end of the fixed iron core 14 from above. At this time, the reference position P is set at a fixed position along the Z axis,
_1, 25 ₂ upon detecting both ends of the magnetic cylindrical member 14 in the fixed iron core 14, i.e. the proximity sensor 25 _1, 25
₂ are fixed detection distances Z _S1 , Z at both ends of the magnetic cylindrical member 15.
When adjacent to _S2, both detection sensors 25 _1, 25 a distance from ₂ of the reference position P Z _1, Z ₂ servomotor 4
Detected by 1 _1, 41 ₂ of the operation amount.

Thus, the axial length L of the magnetic cylindrical member 15 in the fixed iron core 14 to be processed is calculated as L = Z ₂ −Z _S2 −Z _S1 −Z ₁ , and accordingly, the magnetic cylindrical member The Z-axis coordinates of the fifteen axial center positions can be calculated. Therefore, based on the center position, the double-edged tools 24 ₁ , 24 ₂
Is determined along the Z-axis direction and the fixed core 14
The amount of movement of the _two blades 24 ₁ , 24 ₂ along the X-axis direction is determined based on the rotation center of
8 is performed.

Next, the operation of this embodiment will be described. By detecting both ends of the magnetic cylindrical member 15 in the fixed iron core 14 with the proximity sensors 25 ₁ and 25 ₂ , the length of the magnetic cylindrical member 15 along the Z-axis direction is detected. Since L can be calculated and the center position of the magnetic cylindrical member 15 along the Z axis can be determined, both ends of the fixed iron core 14 can be machined based on the center position of the magnetic cylindrical member 15 along the Z axis. . Therefore, even if the thickness of the coating film 16 is uneven at both ends of the fixed core 14, the processing dimensions along the axial direction, that is, the Z-axis direction of the magnetic cylindrical member 15 are not varied at both ends so that the fixed core does not vary. Steps 17 and 18 can be formed at the outer peripheral edges of both ends of 14.

Even if there is some variation in the axial length of the magnetic cylindrical member 15, by processing both ends of the fixed iron core 14 based on the center position of the magnetic cylindrical member 15 along the Z-axis, Each time the length is different, it is possible to adjust the processing dimension along the Z axis.

In the above embodiment, the case where both ends of the fixed iron core 14 of the stator 13 are machined has been described. However, the present invention relates to a magnetic cylindrical member made of a magnetic metal at least at both ends in the axial direction of a coating made of a non-magnetic material. The present invention can be widely applied to a processing method for processing both ends of a workpiece on which a film is formed.

[0026]

As described above, according to the present invention, a reference position is set on the Z-axis, and a work having an axis disposed on the Z-axis is held rotatably around the axis, thereby obtaining a magnetic field. A pair of proximity sensors that can detect that the material has approached a certain detection distance and have a constant relative position along the Z-axis direction with both cutting tools, and respectively detect both axial end faces of the magnetic cylindrical member. In addition, the center position along the Z-axis direction of the magnetic cylindrical member based on the distance along the Z-axis direction from the reference position at the time of the detection to the two proximity sensors, and the constant detection distance along the Z-axis direction by both the detection sensors. Is set, and the amount of movement of the two cutting tools along the Z-axis direction is determined based on the center position thereof, and the amount of movement of the two cutting tools along the X-axis direction is determined based on the rotation center of the work. center By setting the position and processing both ends of the work based on it, even if the thickness of the coating film is uneven at both ends of the work and the length of the magnetic cylindrical member varies, the magnetic cylinder Both ends of the member can be processed with uniform dimensions.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a rotary electric machine showing a main part in an enlarged state.

FIG. 2 is a front view of a processing apparatus before processing a workpiece.

FIG. 3 is a front view of the processing apparatus in a processing state.

FIG. 4 is an enlarged view of a right portion of FIG.

FIG. 5 is a view taken in the direction of arrow 5 in FIG. 4;

FIG. 6 is a sectional view taken along line 6-6 of FIG. 4;

FIG. 7 is an enlarged view of a left portion of FIG. 2;

FIG. 8 is a longitudinal sectional view showing a state where both end faces of a work are detected.

[Explanation of symbols]

14 Fixed iron core as work 15 Magnetic cylindrical member 16 Coating film 24 ₁ , 24 ₂ Blade tool 25 ₁ , 25 ₂ Proximity sensor

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B23B 5/00 B23B 25/06 B23Q 17/22

Claims (1)

(57) [Claims] 1. A magnetic cylindrical member made of a magnetic metal.
The two ends of a work (14) having a coating film (16) made of a non-magnetic material formed at least at both ends in the axial direction are perpendicular to the Z-axis direction along the axial direction of the work (14) and the Z-axis. In a method for processing both ends of a cylindrical work for processing with a pair of cutting tools (24 ₁ , 24 ₂ ) each capable of moving in the X-axis direction, a reference position is set on the Z-axis and the Z-axis is set. the workpiece (14) placing the axis on leave rotatably held about an axis, a double-edged tool with magnetic material could be detected that close to constant detection distance (24 _1, 24 ₂₎ and A pair of proximity sensors (25 ₁ , 25) having a constant relative position along the Z-axis direction.
₂ ) detecting both axial end faces of the magnetic cylindrical member (15), and detecting the distance along the Z-axis from the reference position to the proximity sensors (25 ₁ , 25 ₂ ) at the time of the detection; The center position along the Z-axis direction of the magnetic cylindrical member (15) is set based on a fixed detection distance along the Z-axis direction by the two detection sensors (25 ₁ , 25 ₂ ), and both cutting tools ( 24 ₁ , 24 ₂ ) is determined along the Z-axis direction, and the amount of movement of the two blades (24 ₁ , 24 ₂ ) along the X-axis direction is determined based on the rotation center of the work (14). Method of processing both ends of a cylindrical work.