JPH1110449A - Horizontal composite machining device of piston ring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To machine inner and outer peripheral faces of a workpiece and to cut and split by one machine. SOLUTION: This horizontal composite machining device of a piston ring consists of an inner and outer peripheral face machining machine main body 1 which machines inner and outer peripheral faces of a workpiece 16 rotated by a C-axis drive means in a condition in which it is put on a common bed 1a and supported so that an axial core becomes substantially horizontal by an inner periphery machining means 25 and an outer periphery machining means which are controlled by an NC unit 35 in synchronization and a cutting and splitting machining machine main body 41 which cuts, splits, and machines the workpiece 16 which is provided on the common bed 1a adjacent to the inner and outer peripheral face machining machine main body 1 and whose inner and outer peripheral faces are machined by the inner and outer peripheral face machining machine main body 1 in the direction of axial line. Consequently, machining of inner and outer peripheries of the workpiece 16 and cutting and splitting machining can be efficiently done by one machine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piston ring horizontal combined machining apparatus capable of performing inner and outer peripheral machining and splitting of a piston ring.

[0002]

2. Description of the Related Art Conventionally, a piston ring used in an engine or the like is formed by laminating a large number of non-circular rings, processing the inner and outer peripheral surfaces into a predetermined shape, and then cutting two outer peripheral portions in the axial direction. In the case where the diameter is reduced and the cut portion is brought into close contact with each other, a method of manufacturing a piston ring whose outer peripheral surface is a perfect circle is generally adopted. JP-A-54-21691,
This is proposed in Japanese Patent Publication No. 6-75814.

The processing apparatus described in Japanese Patent Application Laid-Open No. Sho 54-21691 is displaced in the radial direction in accordance with the degree of a non-circular curve of a piston ring and a machine shaft on which a stacked piston ring assembly is mounted. Tool support means, and at least two or more electromechanical step drive means controlled by a computer and installed before and after in the direction of its operation. By controlling the step driving means by a computer while rotating the piston ring assembly, the inner and outer peripheral surfaces of a work having a non-circular curve formed by a free curve can be simultaneously and accurately processed.

On the other hand, the numerical control lathe described in Japanese Patent Publication No. 6-75814 has a cutting tool for cutting a work mounted on a carriage that can move forward and backward in a direction of moving the work by a linear motor. A motor is numerically controlled by a computer to cut the outer periphery of a skirt of a work such as a piston.A plurality of sets of rotating members and a biasing device are provided on a guide portion for supporting reciprocation of a carriage. Since the reaction force generated in the tool while the workpiece is being cut is supported by the rotating member and the biasing device, the carriage can be reciprocated without any rattling or shaking, so that the accuracy is high. It has effects such as enabling cutting.

[0005]

However, Japanese Patent Application Laid-Open No. Sho 54-2
In the machining apparatus described in FIG. 1691, in particular, as shown in FIG. 5, a tool in which a tool for machining the outer periphery of a work is mounted on a sliding head that is controlled to move by two step driving means provided side by side. Along with providing the supporting means, on the sliding head, another sliding head that is movable in the same direction as the sliding head by the step driving means is provided,
Because this sliding head is provided with tool support means to which a tool for processing the inner periphery of the work is provided,
Since the driving systems overlap each other and become complicated, and the control means for controlling the driving systems become complicated, there is a problem that the entire apparatus becomes expensive.

On the other hand, in the numerical control lathe disclosed in Japanese Patent Publication No. 6-75814, since the inner and outer peripheral surfaces of the work cannot be simultaneously processed, the productivity is poor, and when the inner and outer peripheries are processed by different machines, Since the concentricity of the inner and outer circumferences is impaired, there is a problem that a piston ring with high processing accuracy cannot be obtained. In addition, since any of the above-mentioned processing devices only processes the inner and outer peripheral surfaces of the piston ring, the work on which the inner and outer peripheral surfaces have been processed needs to be cut using another cutting device. In addition, there is a problem that equipment costs are increased due to a plurality of devices, and a lot of space is required for installing each device.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and provides a horizontal composite machining apparatus for a piston ring in which the machining of the inner and outer peripheral surfaces and the splitting machining can be performed by one machine. It is an object of the present invention to improve productivity and reduce equipment costs, installation space, and the like.

[0008]

Means for Solving the Problems and Effects of the Invention To achieve the above object, the invention according to the first aspect of the present invention is a method of driving a C-axis while being installed on a common bed and supported so that the axis is substantially horizontal. An inner and outer peripheral surface processing machine body for simultaneously processing the inner and outer peripheral surfaces of the workpiece rotated by the means by an inner peripheral processing means and an outer peripheral processing means synchronously controlled by an NC device, and the inner and outer peripheral surface processing machine body on a common bed And a cutting machine main body for cutting the workpiece in which the inner and outer peripheral surfaces are machined by the inner and outer peripheral surface machining machine body in the axial direction.

[0009] With the above configuration, the cutting process can be continuously performed on the inner and outer peripheral surfaces of the piston ring with one processing device, so that it is not necessary to separately install a plurality of processing machines, thereby reducing equipment costs and installation space. In addition, the need for storing semi-finished products whose inner and outer peripheral surfaces have been processed is eliminated, so that labor and space for storing are not required. In addition, since the work is supported so that the axis of the work to be processed on the inner and outer peripheral surfaces is almost horizontal, the center of gravity and height of the processing device can be reduced, and the rigidity of the column is increased. The processing accuracy is improved, and the installation of the work transfer device and the like is facilitated.

According to another aspect of the present invention, there is provided an inner and outer periphery of a work which is installed on a common bed and rotated by a C-axis driving means while being supported so that an axis thereof is substantially horizontal. An inner / outer peripheral surface processing machine body for simultaneously processing a surface by an inner peripheral processing means and an outer peripheral processing means synchronously controlled by an NC device; and It is composed of a cutting machine main body that cuts the work supported by the peripheral processing machine body after the inner and outer peripheral surfaces have been machined so that the axis is almost horizontal, by one cutter in multiple times. Things.

According to the above configuration, since the cutting process can be continuously performed on the inner and outer peripheral surfaces of the piston ring by one processing apparatus, it is not necessary to separately install a plurality of processing machines, thereby reducing equipment costs and installation space. In addition, the need for storing semi-finished products whose inner and outer peripheral surfaces have been processed is eliminated, so that labor and space for storing are not required. In addition, the processing time of the inner and outer peripheral surfaces of the piston ring and the cutting time of the piston ring are equalized, improving the line balance. This eliminates the need for one of the processing machines to be stopped. Ascent and productivity can be improved.

According to a third aspect of the present invention, in order to achieve the above object, the cutting machine body is configured such that the center of the cutting of the workpieces stacked in the axial direction is eccentric with respect to the B axis parallel to the axis. The left and right work support means for clamping both ends of the work from the left and right directions in the state where the work is performed, and the B-axis indexing means for indexing and rotating the work around the B-axis to determine the cutting position of the work. Means, a Y-axis slide provided movably in the Y-axis direction parallel to the B-axis and movable in the Y-axis direction by a Y-axis motor, and a Y-axis slide provided on the Y-axis slide and provided by the X-axis motor. It comprises a spindle head that can move forward and backward in the direction of contacting and separating the work, and a cutter that is provided on the spindle head and that is rotated by a spindle motor to cut the work.

According to the above configuration, the diameter of the cut work is reduced and the cut portions are brought into close contact with each other, so that a butt portion is not opened and a piston ring having high roundness can be easily formed. In addition to being able to be obtained, it is complicated such as manually adjusting the cutter position in multiple axes directions,
In addition, since a difficult operation requiring skill is not required, the setup time can be greatly reduced, and a trial cutting process or the like is not required, so that the operation efficiency can be improved.

Further, since no adjustment work is required, no skill is required for the work, and the occurrence of processing defects is reduced, so that the defective rate can be reduced and the cost of the product can be reduced accordingly. .

According to a fourth aspect of the present invention, a work is carried into the inner / outer peripheral surface processing machine body above the inner / outer peripheral surface processing machine body and the slitting machine main body. A work transfer means is provided for transferring the work, the inner and outer peripheral surfaces of which have been processed by the main body, to the main body of the slitting machine, and for carrying out the work which has been completed by the main body.

According to the above configuration, since the transfer of the work, the transfer between the processing machine main bodies and the unloading of the completed work can all be automated, the apparatus can be operated unattended, thereby reducing labor costs. Significant reduction can be achieved.

[0018]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of a horizontal composite machining apparatus capable of continuously performing the simultaneous machining of the inner and outer peripheral surfaces of the piston ring and the cutting of the piston ring having completed the machining of the inner and outer peripheral surfaces, and FIG. 3 is a side view of the same.

In these figures, reference numeral 1 denotes an inner / outer peripheral surface processing machine main body, and 41 denotes a split cutting machine main body, which is installed on the common bed 1a so as to be separated from left to right and located at the same center.

The main body 1 has a column 1b on a common bed 1a, and a Z-axis movable in the left-right direction (Z-axis direction) by a Z-axis driving means 3 in front of the column 1b. A slide 2 is provided. The Z-axis slide 2 is supported on a guide rail 1c composed of a ball-type linear guide laid in the Z-axis direction on the front surface of the column 1b, and has a Z-axis motor 4 composed of a servomotor installed at the rear of the column 1b. Is moved in the Z-axis direction.

That is, as shown in FIG. 4, a pair of screw shafts 5 composed of ball screws are connected to the rotation shaft 4a of the Z-axis motor 4 via transmission means 4b such as a timing belt and a gear. A nut member 5a fixed to the Z-axis slide 2 is screwed to the screw shaft 5, and when the Z-axis motor 4 rotates the screw shaft 5 forward and reverse, the Z-axis slide 2 moves right and left along the guide rail 1c. You can move in any direction.

The Z-axis slide 2 is provided with a left work support means 10 and a right work support means 11 which are spaced apart in the left-right direction. Left work support means 10
As shown in FIG. 5, is provided on the right side of the hydraulic cylinder 12 provided on the left side of the Z-axis slide 3 and on the right side of the piston 12a housed in the hydraulic cylinder 12.
It has a left spindle 10a.

The left spindle 10a has a cylindrical shape, and is mounted on the hydraulic cylinder 12 through a plurality of bearings 13 in a Z-shape.
The end face of the piston 12a is attached to the end face of the ring 10b fitted to the outer peripheral portion of the left spindle 10a, while being axially movable and rotatable.
4, the left spindle 10a can be pressurized rightward through the piston 12a by supplying hydraulic pressure to the hydraulic chamber 12b of the hydraulic cylinder 12. At the center of the hydraulic cylinder 12, a fixed shaft 10c having one end fixed to the end surface of the hydraulic cylinder 12 is provided. The other end of the fixed shaft 10c is the piston 1
2a, the center of the left spindle 10a is reached, and a bearing 1d is provided on a spring seat 10d provided at the other end.
A plurality of compression springs 10e for urging the left spindle 10a to the left via 4a are provided.

At the end of the left spindle 10a,
A clamp head 10f for clamping the work 16 is provided between the clamp heads 11f provided on the right work support means 11 and a left spindle 10a.
A gear train 18 constituting the C-axis driving means 18
a driven gear 18b is keyed. As shown in FIG. 5, the C-axis driving means 18 has a C-axis motor 19 composed of a servomotor mounted on a gear case 20a of a speed reducer 20 fixed substantially at the center of the column 1b. Is connected to the input shaft 20a of the speed reducer 20.

The input shaft 20b has a workpiece 16 at the time of machining.
A flywheel 20c for stabilizing the rotation so that rotation unevenness does not occur is mounted, and an output gear 20d of the speed reducer 20 has a drive shaft 18c composed of a spline shaft.
Of the C-axis motor 1
9 allows the drive shaft 18c to rotate forward and reverse via the speed reducer 20.

The drive shaft 18c is rotatably supported in the horizontal direction so as to be parallel to the axis of the work 16, and is provided on the left work support means 10 and the right work support means 11 at the middle and right ends, respectively. The drive gear 18d of the gear train 18a is in spline engagement. These drive gears 18d are meshed with driven gears 18b provided on the outer peripheral portion of the left spindle 10a and the outer peripheral portion of the right spindle 11a via the intermediate gear 18e, and drive the drive shaft 18c and the gear train 18a by the C-axis motor 19. Through left spindle 1
0a and the right spindle 11a can be synchronously rotated in the same direction.

The right spindle 11a is also formed in a cylindrical shape similarly to the left spindle 10a, and is rotatably supported on the Z-axis slide 3 via a bearing 21. A thrust bearing 22 is interposed between the driven gear 18b keyed to the outer periphery of the spindle 11a. And the right spindle 11a
Further, a clamp head 11f for clamping the work 16 between clamp heads 10f attached to the left spindle 10a is provided.

When the left spindle 10a and the right spindle 11a are rotationally driven synchronously by the C-axis motor 19, rotation unevenness occurs in the left and right spindles 10a and 11a due to splines of the drive shaft 18c and backlash of the gear train 18a. Phase shift occurs. To prevent this, the plate 11g of the right spindle 11a can be fixed by a locking means (not shown) such as Loctite while the backlash of the gear train is removed when the work 16 is processed.

On the other hand, on the column 1b, an inner peripheral processing means 25 for processing the inner peripheral surface of the work 16 is provided.
Outer peripheral surface processing means 24 for simultaneously processing the outer peripheral surface of the
Is provided. As shown in FIG. 6, the outer peripheral processing means 24 includes a support member 24a fixed to the rear surface of the column 1b.
At the end of the support member 24a, a cylindrical guide member 24b is provided horizontally so as to be parallel to the X axis, and a ball spline 24 is provided in the guide member 24b.
The tool support member 24d is supported movably in the X-axis direction via c.

A tool 26 for cutting the outer peripheral surface of the work 16 is detachably attached to an end of the tool support member 24c on the work 16 side via a tool attachment member 24e. On the opposite end,
The nut member 27a is fixed, and this nut member 2
One end of a screw shaft 27 composed of a ball screw is screwed into 7a. An X-axis motor 28 composed of a servomotor is connected to the other end of the screw shaft 27. By rotating the X-axis motor 28 in the normal or reverse direction, the tool support member 24d on which the tool 26 is It can move in the direction of contact and separation.

As shown in FIG. 7, the inner peripheral processing means 25 for processing the inner peripheral surface of the work 16 is a roller linear linear machine laid in the U-axis direction parallel to the X-axis on the vertical surface 1c of the column 1b. It has a U-axis slide 25a supported on a guide rail 31 composed of a guide. The upper part of the U-axis slide 25a is covered with a roof-shaped cover 25c so that chips are easily discharged, and the U-axis slide 2
A U-axis slide 25 is provided between the vertical surface of the column 5a and the column 1b.
U consisting of a linear servomotor that drives a in the U-axis direction
A shaft motor 32 is provided.

The tip end of the U-axis slide 25a reaches the right side of the right spindle 11a, and one end of a boring bar 25b provided substantially horizontally at the tip end is fixed. The other end of the boring bar 25b passes through the right spindle 11a and reaches the inside of the work 16, and a tool 33 for cutting the inner periphery of the work 16 is detachably attached to the tip.

In FIG. 7, reference numeral 34 denotes slide position detecting means such as a linear scale for detecting the position of the U-axis slide 25a. The signals detected by the detecting means 34 are the Z-axis motor 4, the C-axis motor 19, the U-axis The data is input to an NC device 35 that performs NC control of the motor 32 and the like.

In FIG. 1, reference numeral 36 denotes a chip conveyor, which carries chips such as chips generated when the work 16 is machined to a chip box 37 installed near the machine body 1. The cutting oil sprayed on the cutting portion during processing is collected in the coolant tank 38.

The configuration of the inner and outer peripheral surface processing machine body 1 has been described above. Next, the configuration of the cutting machine body 41 will be described in detail with reference to FIGS. As in the case of the inner and outer peripheral surface processing machine main body 1, a column 41b is installed on the common bed 1a, and the slitting machine main body 41 is provided with a linear guide in the left-right direction (Y-axis direction) on the front surface of the column 41b. A pair of guide rails 42 are laid, and the guide rails 4
2, a Y-axis slide 43 is slidably supported in the Y-axis direction.

A screw shaft 44 composed of a ball screw is provided between the guide rails 42 so as to be parallel to the guide rails 42.
A nut member (not shown) fixed to the Y-axis slide 43 side is screwed to the screw shaft 44, and the upper end of the screw shaft 44 is set on the side surface of the column 41b. A Y-axis motor 45 composed of a servomotor is connected, and the Y-axis slide 45 can be moved in the Y-axis direction by rotating the screw shaft 44 forward and reverse by the Y-axis motor 45.

On the upper surface of the slide 43, guide rails 49 composed of linear guides are laid in a horizontal direction (X-axis direction) orthogonal to the Y-axis, and are movable on these guide rails 49 in the X-axis direction. Spindle head 50
Is supported. As shown in FIG. 9, a screw shaft 52 composed of a ball screw is provided below the spindle head 50 so as to be parallel to the guide rail 49, and a nut fixed to the lower portion of the spindle head 50 is attached to the screw shaft 52. A member (not shown) is screwed, and one end of the screw shaft 52 is connected to an X-axis motor 53, which is a servomotor installed on the Y-axis slide 43, via an endless belt 54. By rotating the screw shaft 52 forward and reverse by the X-axis motor 53, the spindle head 50 can be moved in the X-axis direction.

As shown in FIG. 9, a spindle 55 is rotatably supported on the spindle head 50 in a vertical direction perpendicular to the X axis. A cutter 56 made of a metal saw is detachably attached to one end of the spindle 55, and the other end of the spindle 55 is connected to a spindle motor 58 made of an inverter-controlled general-purpose motor via a worm speed reducer 57. Connected to the spindle 55 and the cutter 5 by the spindle motor 58.
6 is rotated.

On the other hand, a B-axis indexing means 60 is provided on one of the opposing surfaces of the column 41b provided on the common bed 1a.
Is installed. The B-axis indexing means 60 has an indexing table 60a that is indexed and rotated about the B-axis, and a substantially C-shaped support frame 61 is installed on the indexing table 60a. ing. The support frame 61 is provided with a left work support means 62 and a right work support means 63 which are centered on the B axis and are separated from each other in the left and right directions.

At the position where the left work support means 62 and the right work support means 63 face each other, the cutting center O ₁ of the works 16 stacked in the axial direction is set in the direction of the work center O _{2 with} respect to the B axis. Clamp heads 62a, 63 for clamping both ends of the work 16 from the left and right directions in a state of being eccentric.
a, and the clamp head 63a of the right work means 63 is provided with a piston rod 64 of a clamp cylinder 64 installed on the other facing surface side of the column 41b.
c It is fixed to the tip.

The clamp cylinder 64 has a cylinder portion 64a fixed to the right end of the support frame 61. The cylinder portion 64a is
The cylinder 6 is rotatably supported in the axial direction.
The piston 64b housed in 4a with the piston rod 64c is protruded, the left ventricle 64 ₁ in the cylinder portion 64a, unclamp port 66 formed in the column 41b is also the right chamber 64 ₂ is connected to a clamp port 67, and the pressure of oil supplied from these ports 66, 67 to the left and right chambers 64 ₁ , 64 ₂ causes the work 1
6 can be unclamped and clamped.

In FIG. 8, reference numeral 68 denotes a clamp detecting means such as a limit switch for detecting clamping or unclamping according to the position of the dog 68a interlocked with the piston 64b. In FIG. 2, reference numeral 70 denotes a work 16
Transporting means for loading the workpiece 16 and unloading the workpiece 16 which has been processed.
C device is shown.

Next, the operation of the horizontal composite machining apparatus constructed as described above will be described. The work 16 which can be processed by this processing apparatus has the same inner and outer peripheral surface shapes as shown in FIG.
In addition, it is possible to efficiently process a relatively large processing diameter using a piston ring or the like having only a different diameter.

Further, since the work 16 is rotated by the C-axis motor 19 and the inner and outer circumferences of the work 16 are simultaneously processed,
The X-axis motors 29 and U are synchronized with the rotation of the C-axis motor 10.
NC motor 35 and Z-axis motor 4
It is necessary to control, and in a normal processing cycle, processing of movement data takes time, and processing is difficult. Therefore, in this embodiment, the machining is performed by selecting the high-speed cycle machining of the NC device 35 or the DNC operation.

In the case where machining is performed by the high-speed cycle machining of the NC unit 35, data converted into the movement amount per basic processing time and the number of repetitions of the cycle are registered in the high-speed machining data area and the header part of the NC unit 35. Then, high-speed cycle machining is performed by the machining main program. In the processing, a cylindrical work 16 is formed by laminating a plurality of piston rings with the same phase, and is clamped from the left and right directions by a hand carrier jig (not shown). 70 to the main body 1 of the inner and outer peripheral surface processing machine, and clamp heads 10f, 11f of the left spindle 10a and the right spindle 11a.
Set between

In this state, the hydraulic pressure is supplied to the hydraulic chamber 12b of the hydraulic cylinder 12, and the left spindle 10a is moved rightward together with the piston 12a.
The workpiece 16 is clamped between the clamp head 10f of the right spindle 11a and the clamp head 11f of the right spindle 11a so that the center line of the work 16 coincides with the centers of the left and right spindles 10a, 11a.

Next, when the phase of the work 16 is indexed in this state, the right and left spindles 10a and 11a are synchronously rotated by the C-axis motor 19 via the C-axis driving means 18, thereby rotating the work 16 and the U-axis. U by motor 32
By moving the shaft slide 25a in the U-axis direction, the tool 33 of the inner peripheral processing means 25 is approached to a position where the inner surface of the work 16 is cut from one end side. At this time, the outer peripheral processing means 2
4 is retracted to a position where it does not interfere with the right work support means 11,
Immediately before cutting the inner peripheral surface of the work 16, the X-axis motor 2
8, the tool support member 24e is advanced in the direction of the work 16, and the tool 2 attached to the tool support member 24e is rotated.
6 is approached to a position where the outer peripheral surface of the work 16 is cut from one end side, and the tool 33 of the inner peripheral surface machining means 25 is
The inner and outer peripheral surfaces of the work 16 are simultaneously cut by the tool 26 of the outer peripheral surface processing means 24.

Further, since the inner and outer peripheral surfaces of the work 16 are formed by different free curves, the X-axis motor 29 and the U-axis motor 32 are separately NC-controlled in synchronization with the rotation of the C-axis, so that the inside and outside of the work 16 are controlled. Along with processing the peripheral surface, the Z-axis motor 4 moves the Z-axis slide 3 in the Z-axis direction as the processing proceeds, thereby cutting the inner and outer circumferences over the entire length of the work 16. Chips generated during processing fall onto the chip conveyor 35, are carried out to the chip box 37 by the chip conveyor 36, and the cutting oil sprayed on the processing section is collected in the coolant tank 38.

When the machining of the inner and outer peripheral surfaces of the work 16 is completed as described above, the tool support member 24 is
e, the tool 26 of the outer peripheral machining means 24 is retracted to the retracted position, then the U-axis motor 32 retracts the U-axis slide 25a to the original position, and the Z-axis motor 4 moves the Z-axis slide 2 After moving to the original position, the hydraulic pressure in the hydraulic chamber 12b of the hydraulic cylinder 12 is discharged, the left spindle 10a is moved by the action of the compression spring 10e, and the work 16 is unclamped. After that, work 1 is used to prevent the phase of each piston ring from shifting by hand carrier jig.
6 is clamped from above and below, and is conveyed by the work conveying means 70 to the cutting machine main body 41 installed on the common bed 1a so as to be adjacent to the inner and outer peripheral surface machining machine main body 1, and cut as follows. Processing is performed.

In cutting the work 16, N
The following processing data shown in FIG. 11 is input to the C apparatus in advance. L: Cutting dimension D: Standard machining diameter α: Cutting angle T: Work width

The work 16 whose inner and outer peripheral surfaces have been processed by the inner and outer peripheral surface processing machine main body 1 is carried by the work transfer device 70 between the left and right work supporting means 62 and 63 of the split processing machine main body 41. At this time, as shown in FIG. 12A, the cutting center O ₁ of the work 16 is
When the cutting process is performed in accordance with the B-axis of FIG. 12, when the diameter of the cut work 16 is reduced due to the thickness t of the cutter 56, as shown in FIG. The desired piston ring cannot be obtained due to the opening.
To prevent this, in the embodiment of the present invention, in consideration of the thickness t of the cutter 56, the cut-split center O ₁ of the workpiece 16 as shown in (b) of FIG. 13 with respect to B-axis, the following The workpiece 16 is decentered by ε calculated by the equation in the opposite direction with the center O _{2 of the} workpiece 16 interposed therebetween.
3, the upper and lower ends of the work 16 are clamped. That is, as shown in FIG. 13A, the cutter thickness t, the cutting angle α about the B axis, the work 16
If the width T is

[0052]

(Equation 1)

[0053] After calculating the eccentricity ε from the above equation, indexing centered with respect to (B-axis), the center O ₂ of the workpiece 16 to indicate the cut-split center O ₁ by eccentricity ε in (b) of FIG. 13 Work support means 6 eccentric in the opposite direction with
The work 16 is set between 2 and 63.

In order to facilitate the work of eccentrically positioning the work 16 with respect to the B axis by ε and setting the work 16 between the left and right work supporting means 62 and 63 with high precision, the left and right work supporting means 6 are used.
Each of the jigs 2 and 63 is provided with a jig capable of setting the work 16 such that the center of the cut is eccentric with respect to the B axis by ε. Thereby, a straight line connecting the side surface of the cutter 56 and the cutting center O ₁ , the B axis, the work center O _2, and the cutting center O _1.
, The angle of the center line passing through is equal to one half of the cutting angle α, so that the piston ring having high roundness can be obtained by calculating the cutting angle of the work 16 about the B axis. .

When the setting of the work 16 is completed as described above, the work of the work 16 is performed by the automatic cycle of the NC device 71.
Carry out the cutting process. First, the spindle motor 58 rotates the cutter 56 in the direction of arrow D in FIG. 1 according to a command from the NC device 71, and at the same time, the indexing table 60a of the B-axis indexing means 60 is rotated about the B-axis by a cutting angle α °. First, the place to be divided is determined.

Next, the X-axis motor 53 is rotated, the spindle head 50 is moved in the Y-axis direction by the screw shaft 52, and the rotating cutter 56 is moved to the cutting position below the work 16 as shown in FIG. To be moved forward. Then Y
Since the axis motor 45 is rotated and the Y axis slide 43 is moved in the Y axis direction by the screw shaft 44, the Y axis slide 4
The work 16 is cut from one end side by the cutter 56 mounted on the work 3. As the Y-axis slide 43 moves, the work 16 is sequentially cut from one end to the other end by the cutter 56, and the cutter 56 is moved to the work 16.
When the cutting operation of the work 16 is completed near the other end of the workpiece 16, the spindle head 50 is retracted to the original position by the X-axis motor 54, and then the Y-axis slide 43 is also returned to the original position by the Y-axis motor 45. Is done.

As described above, when the first division is completed, the indexing table 60a of the B-axis indexing means 60 is rotated in the direction opposite to the above, and the next position is determined. However, at this time, when the indexing table 60a is rotated about the B axis by the cutting angle α °, the work 16 is excessively cut by the thickness t of the cutter 56, and the diameter of the cut work 16 is reduced. However, a perfect piston ring as shown in FIG. 13 (b) cannot be obtained. To prevent this, the cutter 56 may be offset in the Y-axis direction by the thickness t, but this method requires a moving means in the Y-axis direction and a control axis for controlling the same, and the structure and control The system becomes complicated.

[0058] As described above in the present invention to solve such a problem, and is decentered by ε the cut-split center O ₁ against B-axis in consideration of the thickness t of the pre-cutter 56.
As a result, even if the next cutting portion is cut without offsetting the cutter 56 by the thickness t, the opening does not occur at the butted portion as shown in FIG. A high degree piston ring can be obtained.

Similarly to the first place, the spindle head 50 is moved by the X-axis motor 53 so that the rotating cutter 56 is moved to one of the cut positions of the work 16 as shown in FIG. Then, the Y-axis slide 43 is moved by the Y-axis motor 45, and the work 16 is cut from one end by the cutter 56. Then, when the cutting process is performed to the other end of the work 16, the spindle 43 is retracted by the X-axis motor 53, and then the slide 43 is returned to the original position by the Y-axis motor 45.

When the cutting operation of the work 16 is completed as described above, the clamp head 62a of the left work support means 62 is moved by the clamp cylinder 65 to release the work 16 and the left and right work support means 62, 63 are separated. After unloading the work 16 by the work transfer means 70,
Next, the work 16 to be cut is carried in by the work transfer means 70 and the above operation is repeated.
By inputting the processing data into the
Since the cutting process by the cutting machine body 41 can be performed automatically from the processing of the inner and outer peripheral surfaces of No. 6, there is no need to perform any operation such as manually adjusting the cutting position as in the related art.

Further, since the work transfer means 70 is provided above the inner and outer peripheral surface processing machine body 1 and the slitting machine main body 41, the work 16 is carried in, the inner and outer peripheral surfaces of the work are processed, and the work 16 is split. In addition, since the unloading of the workpiece 16 can be automatically performed, productivity can be greatly improved.

Further, the time for machining the inner and outer peripheral surfaces of the work 16 and the time for cutting the work 16 are different from each other.
Although it takes more time to process the inner and outer peripheral surfaces of No. 6, in the above-described embodiment, the work 16 is divided into two times using the cutting machine body 41 as one cutter. As a result, the time for machining the inner and outer peripheral surfaces of the work 16 and the time for cutting the work 16 are substantially the same, so that the line balance is uniformed and the cutting machine body 41 is almost at rest. Since this is eliminated, the operation rate of the apparatus is substantially increased, and effects such as contributing to improvement in productivity can be obtained.

[Brief description of the drawings]

FIG. 1 is a plan view showing a horizontal combined machining apparatus for a piston ring according to an embodiment of the present invention.

FIG. 2 is a front view of the inner and outer peripheral surface processing machine main body according to the embodiment of the present invention.

FIG. 3 is a side view of the inner and outer peripheral surface processing machine main body according to the embodiment of the present invention.

FIG. 4 is a sectional view of a Z-axis driving unit of the inner and outer peripheral surface processing machine main body according to the embodiment of the present invention;

FIG. 5 is a sectional view of a C-axis driving means of the inner and outer peripheral surface processing machine main body according to the embodiment of the present invention.

FIG. 6 is a sectional view of an outer peripheral processing means of the inner and outer peripheral surface processing machine main body according to the embodiment of the present invention;

FIG. 7 is a partially cutaway plan view of an inner peripheral processing means of the inner and outer peripheral surface processing machine body according to the embodiment of the present invention.

FIG. 8 is a partially cutaway front view of the cutting machine body according to the embodiment of the present invention.

FIG. 9 is a perspective view of the vicinity of a spindle head of the cutting machine body according to the embodiment of the present invention.

FIG. 10 is a plan view of a workpiece processed by the inner / outer peripheral surface processing machine main body according to the embodiment of the present invention;

FIG. 11 is an explanatory view showing dimensions of each part of a piston ring to be cut.

FIGS. 12A and 12B are explanatory diagrams showing a problem in the case where the cutting is performed with the center of the cutting being made coincident with the B-axis.

FIGS. 13A and 13B are explanatory views showing a method of splitting a piston ring according to an embodiment of the present invention.

14 (a) and 14 (b) are process diagrams showing a piston ring cutting method according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Inner / outer peripheral surface processing machine main body 1a ... Common bed 1b ... Column 1c ... Guide rail 2 ... Z-axis slide 3 ... Z-axis drive means 4 ... Z-axis motor 4a ... Rotary shaft 4b ... Transmission means 5 ... Screw shaft 5a ... Nut Member 10 ... Left work support means 10a ... Left spindle 10b ... Ring 10c ... Fixed shaft 10d ... Spring seat 10e ... Compression spring 10f ... Clamp head 11 ... Right work support means 11a ... Right spindle 11f ... Clamp head 11g ... Plate 12 ... Hydraulic pressure Cylinder 12a ... Piston 12b ... Hydraulic chamber 13 ... Bearing 14 ... Thrust bearing 14a ... Bearing 16 ... Work 18 ... C-axis driving means 18b ... Driving gear 18c ... Drive shaft 18d ... Driving gear 18e ... Intermediate gear 19 ... C-axis motor 20 ... Reducer 20a ... Gear case 20b ... Input shaft 20c ... Fly wheel 20d ... output gear 21 ... bearing 22 ... thrust bearing 24 ... outer circumference processing means 24a ... support member 24b ... guide member 24c ... ball spline 24d ... tool support member 24e ... tool attachment member 25 ... inner circumference processing means 25a ... U-axis slide 25b ... Boring bar 25c ... Cover 26 ... Tool 27 ... Screw shaft 27a ... Nut member 28 ... X-axis motor 31 ... Guide rail 32 ... U-axis motor 34 ... Detection means 35 ... NC device 36 ... Chip conveyor 37 ... Chip box 38 ... Coolant Tank 41: Splitting machine body 41b Column 42 Guide rail 43 Y-axis slide 44 Screw shaft 45 Y-axis motor 49 Guide rail 50 Spindle head 52 Screw shaft 53 X-axis motor 54 Endless belt 55 ... spindle 56 ... cutter 57 ... c Boom reduction gear 58 ... Spindle motor 60 ... B axis indexing means 60a ... Table 61 ... Support frame 62 ... Left work support means 62a ... Clamp head 63 ... Right work support means 63a ... Clamp cylinder 64a ... Cylinder part 64b ... Piston 64c ... Piston rod 64 ₁ ... Left chamber 64 ₂ ... Right chamber 66 ... Unclamp port 67 ... Clamp port 68 ... Clamp / unclamp detecting means 70 ... Work transfer means 71 ... NC device

Claims (4)

[Claims] 1. An NC device (35) for synchronously controlling the inner and outer peripheral surfaces of a work (16) which is installed on a common bed (1a) and rotated by a C-axis driving means (18) while being supported so that its axis is substantially horizontal. Inner and outer peripheral surface processing machine body 1 that is simultaneously processed by inner and outer peripheral processing means 25 and outer peripheral processing means 24, and the inner and outer peripheral surface processing machine body 1 on a common bed 1a.
And a cutting machine main body 41 that is installed adjacent to the main body and that cuts a workpiece 16 having an inner and outer peripheral surface processed by the inner and outer peripheral surface processing machine main body 1 in an axial direction. Horizontal composite machining equipment. 2. An NC device 35 synchronously controls the inner and outer peripheral surfaces of the work 16 which is installed on the common bed 1a and is rotated by the C-axis driving means 18 while being supported so that the axis is substantially horizontal. Inner and outer peripheral surface processing machine body 1 that is simultaneously processed by inner and outer peripheral processing means 25 and outer peripheral processing means 24, and the inner and outer peripheral surface processing machine body 1 on a common bed 1a.
The work 16 which is installed so as to be adjacent to and supported by the inner / outer peripheral surface processing machine body 1 so that the inner and outer peripheral surfaces thereof are processed so that the axis is substantially horizontal is divided into a plurality of times by one cutter 56. And a cutting machine main body 41 for cutting the piston ring. 3. The cutting machine main body 41 is configured such that the center of the cutting of the workpieces 16 stacked in the axial direction is eccentric with respect to the B axis parallel to the axis, and the both ends of the workpiece 16 are left and right. The left work support means 62 and the right work support means 63 for clamping from the direction, and the work 16 around the B axis.
B-axis indexing means 60 for indexing and rotating the workpiece 16 to determine the cutting position of the work 16, and provided movably in the Y-axis direction parallel to the B-axis, and provided in the Y-axis direction by a Y-axis motor 45. A movable Y-axis slide 43; and a work 1 provided on the Y-axis slide 43 and driven by an X-axis motor 53.
3. A spindle head (50) that can move forward and backward in a direction in which the workpiece (6) moves toward and away from the workpiece (6), and a cutter (56) provided on the spindle head (50) and rotated by a spindle motor (55) to cut the work (16). Horizontal multi-tasking machine for piston rings. 4. The work 16 is inserted into the main body 1 of the inner and outer peripheral surfaces above the main body 1 of the inner and outer peripheral surface processing machines and the main body 41 of the cutting machine.
The work 16 on which the inner and outer peripheral surfaces have been processed by the inner and outer peripheral surface processing machine main body 1 is transported to the slitting machine main body 41, and the workpiece 16 on which the split processing has been completed by the slit processing machine main body 41.
A horizontal multi-axis machining apparatus for a piston ring, comprising a work transfer means 70 for carrying out a workpiece.