JPH10244426A - Composite working device for piston ring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform work of inside and outside surfaces and cuttingly splitting work by a single device by mutually adjacently arranging an inner-outer peripheral surface working machine main body to simultaneously work inner-outer peripheral surfaces of a piston ring by synchronous control by an NC device and a cuttingly splitting work machine main body to perform cuttingly splitting work on the piston ring, on a common bed. SOLUTION: After a phase of a work (a piston ring) is indexed, upper and lower spindles are synchronously rotated through a C shaft driving means by a C shaft motor 19, and the work is rotated, and cutting work is also performed on an outer peripheral surface of the work from, for example, the lower end side of the work by a tool 26 arranged in an outer periphery work means 24, and at the same time, cutting work is performed on an inner peripheral surface of the work from the lower end side by a tool 33 of an inner periphery work means 25. By a work carrying means, the work is carried to a cuttingly splitting working machine main body 41 arranged on a common bed 1a so as to be adjacent to an inner-outer peripheral surface working machine main body 1, and cuttingly splitting work is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combined processing apparatus for a piston ring capable of performing inner and outer peripheral processing and splitting processing 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 general, a method of manufacturing a piston ring in which the outer peripheral surface becomes a perfect circle when the diameter is reduced and the cut portions are brought into close contact with each other has been adopted. It has been proposed in Japanese Patent Laid-Open No. 54-21691 and 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, in the processing apparatus disclosed in the former publication, the stacked piston ring assembly is mounted on a machine shaft provided horizontally and rotated, and the inner and outer circumferences of the piston ring assembly are simultaneously rotated by a cutting tool. Because of the cutting configuration, the chips generated when cutting the inner circumference are stagnated in the work, and a means for discharging the chips is required, and processing is performed without discharging the chips. If it is continued, the processing accuracy will decrease due to chips, or the temperature of the workpiece will increase,
There is a problem such as adversely affecting the processing accuracy.

[0006] Further, since the piston ring assembly whose inner and outer peripheral surfaces have been machined needs to be machined using a separate machine, a plurality of machines are required to increase the equipment cost. There are problems such as requiring a lot of space to install the device.

On the other hand, the numerical control lathe disclosed in the latter publication cannot process the inner and outer peripheral surfaces of the work at the same time because it is a lathe for processing only the outer peripheral surface of the work. When machining with the above-mentioned machine, there is a problem in that machining accuracy is poor, for example, the concentricity of the inner and outer circumferences is impaired. Also, after processing the inner and outer peripheries with different processing machines, similarly to the former publication, since it is necessary to perform splitting using another splitting device, equipment costs increase or equipment is installed. However, there was a problem that required a lot of space.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem, and provides a combined processing apparatus for a piston ring in which the processing of the inner and outer peripheral surfaces and the split processing can be performed by a single apparatus. It is intended to improve productivity and reduce equipment costs, installation space, and the like.

[0009]

In order to achieve the above object, an invention according to claim 1 is directed to an inner and outer peripheral surface for simultaneously machining the inner and outer peripheral surfaces of a piston ring on a common bed by synchronous control by an NC device. The main body of the processing machine and the main body of the cutting machine for performing the split processing of the piston ring are installed adjacent to each other.

[0010] With 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 device, 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.

According to a second aspect of the present invention, there is provided an inner / outer peripheral surface processing machine body for simultaneously processing the inner and outer peripheral surfaces of a piston ring on a common bed by synchronous control by an NC device, and a piston with one cutter. A cutting machine body for cutting a ring in a plurality of times is installed adjacent to each other.

According to the above configuration, the inner and outer peripheral machining time of the piston ring and the splitting time of the piston ring are equalized, so that the line balance is improved, so that one of the processing machines does not have to be stopped. The overall operation rate increases, and productivity can be improved.

According to a third aspect of the present invention, there is provided an inner / outer peripheral surface processing machine body for simultaneously processing the inner and outer peripheral surfaces of a piston ring on a common bed by synchronous control by an NC unit, and cutting the piston ring. The cutting machine body to be machined is installed adjacent to each other, and between the inner and outer peripheral surface machine body and the cutting machine body, the workpiece whose inner and outer peripheral surfaces have been processed is transferred to the cutting machine body. A work transfer means for transferring the work is provided.

According to the above configuration, the work, which has been processed by the inner / outer peripheral surface processing machine main body, can be carried into the split processing machine main body by the work transfer means. Cutting can be performed continuously.

According to a fourth aspect of the present invention, there is provided a work supporting means for clamping a work having a substantially vertical axis to a work which is rotatable vertically from above and below, and the work support means. C-axis driving means for rotating the work through the means, outer peripheral processing means provided movably in the X-axis direction orthogonal to the axis of the work, and processing the outer peripheral surface of the work with a tool; Inner peripheral processing means provided movably in the parallel U-axis direction and for processing the inner peripheral surface of the work with a tool inserted from the end of the work, and a Z-axis for moving the work in the axial direction And a driving means.

According to the above configuration, the chips generated during the cutting of the inner peripheral surface do not fall down and stay in the work, so that the processing accuracy is not reduced by the chips and the chips are not reduced. Since there is no need to provide a separate means for discharging
The configuration can be simplified.

Further, since the vertically stacked workpieces are clamped in the vertical direction to hold the workpieces, the processing apparatus body for supporting the pressurizing means can be made smaller than in the case where the workpieces are clamped from the lateral direction. In addition, since the structure can be simplified, the cost of the apparatus can be reduced.

According to a fifth aspect of the present invention, in order to achieve the above object, the cutting machine main 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. An upper work supporting means and a lower work supporting means for clamping both ends of the work from above and below in a state in which the work is cut off, and a B-axis indexing means for indexing and rotating the work about the B-axis to determine a cutting position of the work. Means, a slide provided movably in the Y-axis direction parallel to the B-axis and movable up and down in the Y-axis direction by a Y-axis motor; and a slide provided on the slide and moved in and out of the work by the X-axis motor. It comprises a spindle head that can move forward and backward in the direction, and a cutter that is provided on the spindle head and that is rotated by a spindle motor to cut the work.

With the above structure, the diameter of the cut work is reduced and the cut portions are brought into close contact with each other, so that there is no gap between the butted portions and a piston ring with 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.

In addition, 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. .

In order to achieve the above object, the invention according to claim 6 is provided with a work carrying means on the work carrying side of the inner and outer peripheral surface processing machine main body and a work carry out means on the work carrying side of the cutting machine main body. Things.

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 unmanned operation of the apparatus becomes possible, thereby reducing labor costs. Significant reduction can be achieved.

[0023]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a combined machining apparatus capable of continuously performing the simultaneous machining of the inner and outer peripheral surfaces of the piston ring and the splitting of the piston ring having completed the machining of the inner and outer peripheral surfaces. Common bed 1a
Above, the inner and outer peripheral surface processing machine main body 1 and the cutting machine main body 41 are installed.

The inner and outer peripheral surface processing machine main body 1 has a column 1b mounted on a common bed 1a, and a Z-axis drive means 3 which is movable in the vertical direction (Z-axis direction) in front of the column 1b. A shaft slide 2 is provided. The Z-axis slide 2 is supported by 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 on the upper portion of the column 1b. To be moved up and down.

That is, as shown in FIG. 5, a screw shaft 5 composed of a ball screw is connected to the rotary shaft 4a of the Z-axis motor 4, and a nut member fixed to the Z-axis slide 2 is connected to the screw shaft 5. 5a is screwed, and by rotating the screw shaft 5 forward and reverse by the Z-axis motor 4, the Z-axis slide 2 can move up and down along the guide rail 3, and the Z-axis slide 2 One end of a rope 6 such as a wire rope is bound to the upper part. The intermediate portion of the cord 6 is connected to the pulley 7 rotatably supported on the column 1b.
A counterweight 8 provided on the rear side of the column 1b is suspended from the other end of the cable 6 and the Z-axis slide 2 is moved by a small-capacity Z-axis motor 4. It can be moved up and down.

The Z-axis slide 2 is provided with an upper work supporting means 10 and a lower work supporting means 11 which are vertically separated from each other. Upper work supporting means 10
Is provided below a hydraulic cylinder 12 provided above the Z-axis slide 2 and has an upper spindle 10a below a piston 12a housed above the hydraulic cylinder 12, as shown in FIG. doing.

The upper spindle 10a has a cylindrical shape, and is vertically and rotatably supported by a lower portion of the hydraulic cylinder 12 via a plurality of bearings 13 and is fitted to the outer periphery of the upper spindle 10a. Ring 10b
The lower surface of the piston 12a is in contact with the upper surface of the piston 12 via a thrust bearing 14, and by supplying a hydraulic pressure to a hydraulic chamber 12b of the hydraulic cylinder 12, the piston 12a
The upper spindle 10a can be pressed downward via a. At the center of the hydraulic cylinder 12,
Fixed shaft 10 whose upper end is fixed to the upper surface of hydraulic cylinder 12
c is provided. The lower end of the fixed shaft 10c penetrates the piston 12a and reaches the center of the upper spindle 10a. On the spring seat 10d provided at the lower end,
A plurality of compression springs 10e for urging the upper spindle 10a upward through the bearings 14 are provided.

An upper clamp head 10f for clamping the work 16 between lower clamp heads 11f provided on the lower work supporting means 11 is provided below the upper spindle 10a.
A driven gear 18b of a gear train 18a constituting the C-axis driving means 18 is keyed to the outer periphery of Oa. The above C
As shown in FIG. 4, the shaft driving means 18 has a C-axis motor 19 composed of a servomotor at the upper part of the column 1b. The C-axis motor 19 is connected to the input shaft 20a of the speed reducer 20. The input shaft 20a is provided with a flywheel 20b for stabilizing the rotation of the work 16 so as not to cause uneven rotation of the work 16 during processing. The drive shaft 18c can be rotated forward and reverse by the C-axis motor 19 via the speed reducer 20.

The drive shaft 18c is rotatably supported in the vertical direction so as to be parallel to the axis of the work 16. The drive shaft 18c is provided on the upper work support means 10 and the lower work support means 11 at the middle and lower ends, respectively. The drive gear 18d of the gear train 18a is in spline engagement. These drive gears 18d are connected via an intermediate gear 18e to the upper spindle 10a.
And a driven gear 10b provided on an outer peripheral portion of the lower spindle 11a. The upper spindle 10a and the lower spindle 11a are synchronized in the same direction by a C-axis motor 19 via a drive shaft 18c and a gear train 18a. It can rotate.

The lower spindle 11a is also formed in a cylindrical shape like the upper spindle 10a.
1 and rotatably supported on the Z-axis slide 2 side, and a thrust bearing 22 is interposed between the Z-axis slide 2 and a driven gear 18b keyed to the outer periphery of the lower spindle 11a. . A clamp head 1f for clamping the work 16 between upper clamp heads 10f attached to the upper spindle 10a is provided above the lower spindle 11a.

When the upper spindle 10a and the lower spindle 11a are rotationally driven synchronously by the C-axis motor 19, the upper and lower spindles 10a, 11a are driven by splines of the drive shaft 18c and backlash of the gear train 18a.
Causes uneven rotation to cause a phase shift. In order to prevent this, at the time of machining the work 16, the backlash of the upper and lower gear trains is removed, and the plate 11 of the lower spindle 11 a is locked by a locking means (not shown) such as Loctite.
g can be fixed.

On the other hand, an outer peripheral processing means 24 for processing the outer peripheral surface of the work 16 is provided substantially in the middle of the column 1b, and an inner peripheral surface for processing the inner peripheral surface of the work 16 simultaneously with the outer peripheral surface is provided on the common bed 1a. A peripheral surface processing means 25 is provided. As shown in FIG. 7, the outer periphery processing means 24 includes a column 1b.
A tool support member 24c is movably supported in the X-axis direction via a ball spline 24a in a cylindrical guide member 24a fixed horizontally to the tool.

At the end of the tool support member 24c on the work 16 side, a tool 26 for cutting the outer peripheral surface of the work 16 is removably mounted via a tool mounting member 24d. 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. The other end of the screw shaft 27 is connected to a bracket 28.
Is connected to an X-axis motor 29 composed of a servomotor attached to the column 1b through the X-axis motor 2
The tool 26 can be moved in the direction of contacting and separating the work 16 by rotating the screw shaft 27 forward and backward by the screw 9.

As shown in FIGS. 8 to 10, an inner peripheral processing means 25 for processing the inner peripheral surface of the work 16 is a roller type linear machine laid on the bed 1a in the U-axis direction parallel to the X-axis. 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 25a is connected between the lower part of the U-axis slide 25a and the upper surface of the bed 1a. A U-axis motor 32 composed of a linear servomotor driven in the direction is provided.

The tip end of the U-axis slide 25a reaches below the lower spindle 11a, and the lower end of a boring bar 25b provided substantially vertically at the tip end is fixed. The upper end of the boring bar 25b reaches the inside of the work 16 through the lower spindle 11a, and a tool 33 for cutting the inner periphery of the work 16 is detachably attached to the upper end.

In FIG. 9, reference numeral 34 denotes U-axis origin detecting means for detecting the origin position of the U-axis slide 25a, and reference numeral 35 denotes slide position detecting means such as a linear scale for detecting the position of the U-axis slide 25a. , 35 are input to an NC device (not shown) that performs NC control on the Z-axis motor 4, the C-axis motor 19, the X-axis motor 29, the U-axis motor 32, and the like.

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. The above cutting machine body 41
Is a common bed 1a similar to the inner and outer peripheral surface processing machine body 1.
A column 41b is provided on the top, and this column 41b
A pair of guide rails 42 composed of linear guides is laid in the vertical direction (Z-axis direction) on the front surface of the slide rail, and a slide 43 is supported on the guide rails 42 so as to be vertically slidable.

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.
The slide 43 is attached to the screw shaft 44.
A nut member 44a fixed to the side is screwed, and an upper end of the screw shaft 44 is connected to a Z-axis motor 45 composed of a servomotor installed on a column 41b.
The slide 43 can be moved in the Z-axis direction by rotating the screw shaft 44 forward and backward by the Z-axis motor 5. The slide 43 has wires 4 such as wires.
One end of 6 is bound. The other end of the cable 46 is
After bypassing the pulley 47 rotatably supported on the column 41b, it is connected to a counterweight 48 provided at the back of the column 41b. 45 allows the slide 43 to move.

On the upper surface of the slide 43, a guide rail 4 composed of a linear guide in the horizontal direction (X-axis direction) is provided.
A spindle head 50 is supported on these guide rails 49 so as to be movable in the X-axis direction. As shown in FIG. 14, 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. Member 5
2a is screwed, and one end of the screw shaft 52 is
An X-axis motor 53 composed of a servo motor installed on the slide 43 side is connected 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. 15, a spindle 55 is rotatably supported on the spindle head 50 in a 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. The spindle 55 and the cutter 56 are connected by the spindle motor 58.
Is to be rotated.

On the other hand, a B-axis indexing means 60 is provided on the common bed 1a at a position facing the column 41b with the slide 43 interposed therebetween. 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. The support frame 61 is provided with an upper work support means 62 and a lower work support means 63 whose center is located on the B axis and which is vertically separated.

[0042] The mutually opposing positions of the upper workpiece support means 62 and the lower workpiece support means 63, the workpiece center O ₂ direction cut-split center O ₁ of the workpiece 16 that are laminated in the axial direction with respect to the B axis Clamp heads 62a and 63 for clamping both ends of the work 16 from above and below in a state of being eccentric.
is provided, and the clamp head 62a of the upper work means 62 can be moved up and down by a clamp cylinder 65 installed above the support frame 61. The Z-axis motor 45 and the X-axis motor 5
3. The spindle motor 58 and the B-axis indexing means 60 are NC-controlled by an NC device (not shown) based on processing data input in advance.

Next, a description will be given of the operation of processing the work 16 composed of the piston ring by the processing apparatus configured as described above. As shown in FIG. 18, the work 16 formed of a piston ring has different shapes of the non-circular curves on the outer circumference and the inner circumference.
It is necessary to separately perform the NC control on the outer peripheral processing means 24 and the inner peripheral processing means 25.

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 19.
The axis motor 32 and the Z-axis motor 4 need to be NC-controlled, 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 function or the DNC operation.

When machining is performed by the high-speed cycle machining of the NC function, data converted into the amount of movement per basic processing time and the number of repetitions of the cycle are registered in the NC high-speed machining data area and the header section. High-speed cycle machining is performed by the main program. In processing, a cylindrical work 16 is formed by stacking a plurality of piston rings in the same phase, and clamped from above and below by a hand carrier jig (not shown). It is carried into the processing machine body 1 and set between the clamp heads 10f, 11f of the upper spindle 10a and the lower spindle 11a.

In this state, the hydraulic pressure is supplied to the hydraulic chamber 12b of the hydraulic cylinder 12, and the upper spindle 10a is lowered together with the piston 12a, so that the upper spindle 10a
Between the clamp head 10f and the clamp head 11f of the lower spindle 11a such that the center line of the work 16 coincides with the center of the upper and lower spindles 10a, 11a.

Next, when the phase of the work 16 is indexed in this state, the upper and lower 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 processing the outer periphery. The tool 26 provided on the means 24 is moved from the lower end side of the work 16 to the work 16
The outer peripheral surface of the work 16 is simultaneously cut from the lower end side by the tool 33 of the inner peripheral processing means 25.

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 machining the peripheral surface, the Z-axis slide 2 is moved down by the Z-axis motor 4 as the machining progresses to cut the inner and outer circumferences over the entire length of the work 16. The cut chips fall downward through the lower spindle 11a, so that the chips do not stagnate in the work 16, thereby damaging the processing surface due to the chips or causing the work 16 and the tool 33
There is no risk that the chips will be caught between them and the tool will be damaged, the tool life will not be shortened early, and the machining accuracy will be reduced due to these factors.

When the processing of the work 16 is completed as described above, the X-axis slide 2 and the U-axis slide 25a are retracted to the original position by the U-axis motor 29 and the U-axis motor 32, and the Z-axis motor 4 After raising the shaft slide 2 to the original position, the hydraulic chamber 12b of the hydraulic cylinder 12
Is released, the upper spindle 10a is raised by the action of the compression spring 10e, and the work 16 is unclamped. Then, the workpiece 16 is clamped from above and below by a hand carrier jig so that the phases of the piston rings do not shift, and the workpiece 16 is adjoined to the inner and outer peripheral surface processing machine main body 1 by a workpiece transfer means (not shown) such as a general-purpose robot. The sheet is transported to the cutting machine main body 41 installed on the common bed 1a to perform the cutting as follows.

In cutting the work 16, N
The following processing data shown in FIG. 19 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 body 1 is carried into the space between the upper and lower work supporting means 62 and 63 by the work transfer means. At this time, as shown in FIG.
The cut-split center _{O 1} of the workpiece 16 in the B-axis indexing means 60 B
When the cutting process is performed in accordance with the axis, when the diameter of the work 16 that has been completely cut is reduced due to the thickness t of the cutter 56, an opening is formed at the butt portion as shown in FIG. As a result, the desired piston ring cannot be obtained. In order to prevent this, in the embodiment of the present invention, the cutter 5
Taking into account the 6 thickness t, the cut-split center O ₁ of the workpiece 16 as shown in (b) of FIG. 21 with respect to B-axis, only ε was calculated by the following equation with respect to the center O ₂ of the workpiece 16 The upper and lower ends of the work 16 are clamped between the upper and lower work support means 62 and 63 by being eccentric in the opposite direction. That is, as shown in FIG. 21A, when the thickness t of the cutter, the cutting angle α around the B axis, and the width T of the work 16 are:

[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. 21 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 by ε with respect to the B axis and setting the work 16 accurately between the upper and lower work supporting means 62 and 63, the upper and lower work supporting means 62 and 63 are provided with: A jig that can set the work 16 so that the center of the cut is eccentric with respect to the B axis by ε is provided. As a result, the side of the cutter 56 and the center O ₁
, The B axis, the work center O ₂ and the cut center O
_Since the angle of the center line passing through 1 coincides with one half of the cutting angle α, the piston ring with high roundness can be obtained by calculating the cutting angle of the work 16 about the B axis. Become.

When the setting of the work 16 is completed as described above, the cutting of the work 16 is performed by the automatic cycle of the NC device. First, the spindle motor 58 rotates the cutter 56 in the direction of arrow D in FIG. 11 in response to a command from the NC device, 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 part to be cut is determined.

Next, the X-axis motor 53 is rotated, the spindle head 50 is moved in the X-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 Z
Since the shaft motor 45 is rotated and the slide 43 is raised in the Y-axis direction by the screw shaft 44, the work 16 is down-cut from the lower end side by the cutter 56 mounted on the slide 43. Then, as the slide 43 is raised, the work 16 is sequentially cut from the lower end to the upper end by the cutter 56, and when the cutter 56 reaches near the upper end of the work 16 and the cut of the work 16 is completed, X is applied.
After the spindle motor 50 is retracted to the original position by the axis motor 54, the slide 43 is also lowered to the original position by the Y-axis motor 45.

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 circular piston ring as shown in FIG. 21 (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 cutter 56 is cut at the next cut without offsetting the cutter 56 by the thickness t, the opening does not occur at the butt 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 the position below the work 16 as shown in FIG. As shown, the slide 43 is raised by the Y-axis motor 45, and the work 16 is cut down from the lower end by the cutter 56. And, when it is cut to the upper end of the work 16,
After the spindle head 50 is retracted by the X-axis motor 53, the slide 43 is lowered to the original position by the Y-axis motor 45.

When the cutting of the work 16 is completed as described above, the clamp head 62a of the upper work supporting means 62 is raised by the clamp cylinder 65 to release the work 16, and the upper and lower work supporting means 62, 63 are released. After the work 16 is carried out from the space, the work 16 to be cut next is carried in and the above operation is repeated.
Since the cutting process by the cutting machine main body 41 can be performed automatically from the processing of the inner and outer peripheral surfaces of the above, there is no need to perform any operation such as manually adjusting the cutting position as in the related art.

By installing a work carrying means on the work carry-in side of the inner and outer peripheral surface processing machine body 1 and a work carry-out means on the work carry-out side of the slitting machine body 41 in advance,
Since it is possible to automatically perform the processing of the inner and outer peripheral surfaces of the work 16, the cutting of the work 16, and the unloading of the cut work 16 after the work 16 is carried in, the 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 perspective view showing a 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 an enlarged view of a main part 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 and Z-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 a work supporting means of the inner and outer peripheral surface processing machine main body according to the embodiment of the present invention.

FIG. 7 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. 8 is a plan view of an inner peripheral processing means of the inner and outer peripheral surface processing machine main body according to the embodiment of the present invention.

FIG. 9 is a side view of the inner peripheral processing means of the inner and outer peripheral surface processing machine main body according to the embodiment of the present invention.

FIG. 10 is a view from the direction of arrow A in FIG. 9;

FIG. 11 is a front view of a cutting machine main body according to an embodiment of the present invention.

FIG. 12 is a plan view of a main body of the cutting machine according to the embodiment of the present invention.

FIG. 13 is a detailed view of the vicinity of a Y-axis motor of the main body of the cutting machine according to the embodiment of the present invention.

FIG. 14 is a detailed view of the vicinity of an X-axis motor of the main body of the cutting machine according to the embodiment of the present invention.

FIG. 15 is a detailed view of the vicinity of the spindle motor of the cutting machine main body according to the embodiment of the present invention.

FIG. 16A is an enlarged view of the upper work supporting means of the piston ring cutting device according to the embodiment of the present invention. FIG. 17 (b) is a view as seen from the direction of arrow E in FIG.

FIG. 17A is an enlarged view of a lower work supporting means of the piston ring cutting device according to the embodiment of the present invention. (B) It is an arrow view from the arrow F direction of (A) of FIG.

FIG. 18 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. 19 is an explanatory diagram showing dimensions of each part of a piston ring to be cut.

FIGS. 20A and 20B are explanatory diagrams showing a problem when the cutting is performed with the cutting center aligned with the B axis.

FIGS. 21 (a) and 21 (b) are explanatory views showing a method of splitting a piston ring according to an embodiment of the present invention.

FIGS. 22 (a) and 22 (b) are process diagrams showing a method of splitting a piston ring according to an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Inner and outer peripheral surface processing machine main body 1a ... Common bed 3 ... Z-axis drive means 10 ... Upper work support means 11 ... Lower work support means 16 ... Work 18 ... C-axis drive means 24 ... Outer circumference processing means 25 ... Inner circumference processing means 25a ... U-axis slide 25b ... Boring bar 26 ... Tool 32 ... Linear motor 33 ... Tool 41 ... Cleaving machine body 43 ... Slide 45 ... Y-axis motor 50 ... Spindle head 53 ... X-axis motor 56 ... Cutter 58 ... Spindle motor 62: upper work supporting means 63: lower work supporting means O ₁ : center of split O ₂ : center of work

Claims (6)

[Claims] 1. An inner and outer peripheral surface processing machine main body 1 for simultaneously processing the inner and outer peripheral surfaces of a piston ring by a synchronous control by an NC device, and a cutting machine main body 41 for cutting and cutting a piston ring on a common bed 1a. A combined processing apparatus for a piston ring, which is installed adjacent to each other. 2. An inner / outer peripheral surface processing machine main body 1 for simultaneously processing the inner and outer peripheral surfaces of a piston ring on a common bed 1a by synchronous control by an NC device, and splitting of the piston ring by a cutter 56 in a plurality of times. A combined machining apparatus for a piston ring, characterized in that a cutting machine body 41 to be machined is installed adjacent to each other. 3. An inner and outer peripheral surface processing machine main body 1 for simultaneously processing the inner and outer peripheral surfaces of the piston ring by synchronous control by an NC device, and a splitting machine main body 41 for splitting the piston ring on a common bed 1a. The workpieces 16 which are installed adjacent to each other and which have completed the processing of the inner and outer peripheral surfaces are provided between the inner and outer peripheral surface processing machine main body 1 and the cutting machine main body 41.
Characterized in that a work transfer means for transferring the workpiece to the cutting machine main body 41 is provided. 4. An inner and outer peripheral surface processing machine main body 1 via work supporting means 10 and 11 for clamping a work 16 having a substantially vertical axis so as to be rotatable from a vertical direction, and the work supporting means 10 and 11. C-axis driving means 18 for rotating the work 16, outer peripheral processing means 24 provided movably in the X-axis direction orthogonal to the axis of the work 16, and processing the outer peripheral surface of the work 16 with a tool 26, An inner peripheral processing means 25 which is provided movably in the U-axis direction parallel to the axis and which processes the inner peripheral surface of the work 16 with a tool 33 inserted from the end side of the work 16; 4. The combined machining apparatus for a piston ring according to claim 1, further comprising a Z-axis drive means for moving the piston ring in a center direction. 5. Both ends of the work 16 are vertically moved in a state in which the center of the cut of the work 16 laminated in the axial direction is eccentric with respect to the B axis parallel to the axis. The upper work supporting means 62 and the lower work supporting means 63 for clamping from the direction
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 the Y-axis motor 45. A vertically movable slide 43; a spindle head 50 provided on the slide 43 and movable back and forth in the direction of contact and separation of the work 16 by the X-axis motor 53; and a spindle motor 58 provided on the spindle head 50 and
4. The combined processing apparatus for a piston ring according to claim 1, wherein the cutter is rotated by a cutter to cut the workpiece. 6. A work carrying means is provided on the work carrying side of the inner / outer peripheral surface processing machine body 1, and a work carrying means is provided on the work carrying side of the split processing machine body 41.
Or the combined processing apparatus of the piston ring of 3.