JP2005169582A - Combined cutting method of machine tool and combined cutting machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combined cutting method of machine tool and a combined cutting machine capable of improving machining efficiency when simultaneously machining peripheral surfaces of a workpiece. <P>SOLUTION: The combined cutting machine S is equipped with a workpiece holding device 110 having a spindle for rotating the workpiece 150. The combined cutting machine S is equipped with a main body 121 which has rotary tools (milling cutter, endmill cutter) and an X-Z axis first drive unit 123 applying feed in the X and Z axis direction, and a main body 131 which has a cutter 134 and an X-Z axis second drive unit 133 (a second drive mechanism) applying feed in the X-Z axis direction. A control device 140 simultaneously drive-controls the X-Z axis first drive unit 123 and the X-Z axis second drive unit 133 so as to simultaneously machine the peripheral surfaces of the rotating workpiece with the rotary tools (milling cutter, endmill cutter) and the cutter 134. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a combined machining method and a combined machining apparatus for a machine tool.

  Conventionally, when turning a peripheral surface of a shaft workpiece, as one method for increasing the machining efficiency, turning with a plurality of turning tools simultaneously as shown in FIG. Yes. FIG. 2A is a schematic view when simultaneous turning is performed on the peripheral surface of the workpiece 10 rotated by a turning spindle motor (not shown) (hereinafter simply referred to as a motor M) by a pair of tool posts (not shown). is there.

  In the same figure, a tool post (not shown) is provided above and below a spindle (not shown), and each tool post is provided with cutting tools 20 and 30 as turning tools. As shown in the figure, turning with a pair of cutting tools 20 and 30 is generally performed to realize high-efficiency machining while preventing an overload from being applied to one turning tool. .

By the way, the present applicant investigated and found Patent Document 1 and Patent Document 2. These documents disclose a technique for cutting the peripheral surface of a rotating workpiece with a single turning tool and simultaneously machining the end surface of the workpiece with a rotating tool. However, these techniques do not simultaneously process the peripheral surface of the workpiece assumed by the present invention, and cannot achieve the object of the present invention, and are not related to the present invention.
JP 2002-361528 A JP-A-5-138406

However, when the peripheral surface of the workpiece is simultaneously cut by the above-described turning tool, there is a problem that improvement in machining efficiency cannot be expected because the output of the motor M is determined.
An object of the present invention is to provide a combined machining method and a combined machining apparatus for a machine tool capable of improving the machining efficiency when simultaneously cutting the peripheral surface of a workpiece.

  In order to solve the above problems, the invention described in claim 1 is characterized in that a work is rotated by a spindle, a rotary tool tool post provided with a rotary tool is fed at least in the X-axis and Z-axis directions, and a turning tool is provided. The turning tool turret is fed at least in the X-axis and Z-axis directions, and the peripheral surface of the rotating workpiece is simultaneously processed by the rotating tool and the turning tool. Is.

  In the invention of claim 2, the work tool is rotated by the spindle, the rotary tool tool post provided with the rotary tool is fed at least in the X axis and Z axis directions, and the turning tool tool post provided with the turning tool is provided at least the X axis and Z. The gist of the combined machining method of a machine tool is characterized in that rough machining by the rotary tool and finishing machining by the turning tool are simultaneously performed on the peripheral surface of the workpiece that is fed and rotated in the axial direction. Is.

  The invention of claim 3 includes a spindle stock having a spindle for rotating a workpiece, a rotary tool tool rest having a rotary tool and a first drive mechanism for providing feed in at least the X-axis and Z-axis directions; A turning tool turret including a turning tool and a second drive mechanism for providing feed in at least the X-axis and Z-axis directions, and a rotating tool and the turning tool to rotate the peripheral surface of the rotating workpiece. The gist of the present invention is a combined machining apparatus comprising control means for simultaneously controlling the first drive mechanism of the rotary tool tool post and the second drive mechanism of the turning tool tool post for simultaneous machining. Is.

  The invention of claim 4 includes a spindle stock including a spindle for rotating a workpiece, a rotary tool tool rest including a rotary tool, and a first drive mechanism that provides feed in at least the X-axis and Z-axis directions; A turning tool turret including a turning tool and a second drive mechanism for providing feed in at least the X-axis and Z-axis directions, and roughing with the rotating tool on the peripheral surface of the rotating workpiece And a control means for simultaneously driving and controlling the first drive mechanism of the rotary tool turret and the second drive mechanism of the turning tool turret in order to simultaneously perform finishing with the turning tool. The gist of the composite processing apparatus is as follows.

(Function)
According to the first aspect of the present invention, the workpiece is rotated by the spindle, the rotary tool turret provided with the rotary tool is fed in at least the X-axis and Z-axis directions, and the turning tool turret provided with the turning tool is provided at least the X-axis. The workpiece is rotated in the Z-axis direction, and the peripheral surface of the rotating workpiece is simultaneously processed by the rotary tool and the turning tool. In this case, the volume (chip removal amount) by which the peripheral surface of the workpiece can be cut (removed) per unit time by the turning tool is determined by the output of the drive source that rotates the spindle. Further, the volume (chip removal amount) by which the peripheral surface of the workpiece can be cut (removed) per unit time by the rotary tool is determined by the output of the drive source that rotates the rotary tool. Therefore, when cutting the peripheral surface of a workpiece simultaneously with these tools, the volume (chip removal amount) that can cut the peripheral surface of the workpiece per unit time is the volume determined by the output of each drive source (chip removal) This is the total amount of values.

  According to the invention of claim 2, the workpiece is rotated by the spindle, the rotary tool turret provided with the rotary tool is fed at least in the X-axis and Z-axis directions, and the turning tool turret provided with the turning tool is provided at least the X-axis. Then, the roughing with the rotary tool and the finishing with the turning tool are simultaneously performed on the peripheral surface of the workpiece that is fed and rotated in the Z-axis direction.

  Here, as a comparison object with respect to the invention of claim 2, a case is considered in which roughing and finishing are simultaneously performed on a workpiece by a roughing turning tool and a finishing turning tool. In this case, there are processing conditions for roughing and processing conditions for finishing. The machining conditions for rough machining are such that the number of rotations of the workpiece per minute (workpiece peripheral speed) is smaller (slower) than the number of rotations of the work for finishing machining per minute (workpiece peripheral speed). When roughing and finishing are simultaneously performed using a roughing turning tool and a finishing turning tool, it is necessary to perform the roughing machining conditions. This is because if the machining is performed under the machining conditions for finishing, the peripheral speed of the workpiece is too high for the roughing turning tool, and the conditions are severe. However, if the machining conditions are used for rough machining, the peripheral speed of the workpiece is too slow and the machining time becomes long.

  On the other hand, in the invention of claim 2, rough machining is performed with a rotary tool, and finishing is performed with a turning tool. In this case, the processing can be performed under finishing processing conditions. The machining conditions for finishing machining are that the number of rotations of the workpiece per minute (workpiece circumferential speed) is greater (faster) than the number of revolutions of the workpiece for rough machining (workpiece circumferential speed) per minute. Therefore, processing time can be shortened.

  According to the invention of claim 3, the control means is configured to simultaneously process the peripheral surface of the rotating workpiece with the rotary tool and the turning tool, and the second drive mechanism of the rotary tool turret and the second of the turning tool turret. The drive mechanism is simultaneously driven and controlled.

  According to the invention of claim 4, the control means performs the first drive of the rotary tool turret so as to simultaneously perform roughing with the rotary tool and finishing with the turning tool on the peripheral surface of the rotating workpiece. The mechanism and the second drive mechanism of the turning tool tool rest are simultaneously driven and controlled.

  According to invention of Claim 1 thru | or 4, when cutting the surrounding surface of a workpiece | work simultaneously, the chip removal amount which the output of the drive source which rotates a spindle per unit time contributes, and it rotates per unit time. Since the total amount of chip removal contributed by the output of the drive source that rotationally drives the tool can be cut, the machining efficiency can be improved.

  According to the second and fourth aspects of the present invention, when roughing and finishing are performed at the same time, the machining can be performed under finishing machining conditions with a high peripheral speed of the workpiece, so that the machining time can be shortened and the machining efficiency can be reduced. Can be improved.

Hereinafter, an embodiment of a combined machining apparatus S which is a machine tool embodying the present invention will be described with reference to FIGS. 1 and 2B. FIG. 1 is a schematic diagram showing the entire combined machining apparatus.
The combined machining apparatus S includes a work holding device 110 as a head stock installed on a frame 100, a rotary tool tool rest 120, and a turning tool tool rest 130. A workpiece holding device 110 detachably holds a workpiece 150 to be processed and is rotatable about a main axis around a predetermined Z axis, and a drive motor that rotationally drives the chuck 111 around the Z axis. 113 and a C-axis drive unit 112 that can be driven to rotate in the C-axis direction around the Z-axis. The predetermined Z axis corresponds to the main axis.

  The rotary tool turret 120 includes a main body 121 provided to be movable in an XZ axis plane having the Z axis and a predetermined X axis orthogonal to the Z axis with respect to the frame 100, and the main body 121. And an XZ-axis first drive unit 123 that can be driven and positioned within the XZ-axis plane. The main body 121 is provided with a tool holder 122 that detachably holds a milling cutter 124 as a rotary tool, and a drive motor 125 that rotationally drives the milling cutter 124 via the tool holder 122. The tool holder 122 can hold the milling cutter 124 detachably. A predetermined Y axis that intersects the X axis and is orthogonal to the XZ axis plane is set in the main body 121.

  The turning tool tool post 130 is arranged so as to be located on the opposite side of the rotary tool tool post 120 with the Z-axis interposed therebetween. Specifically, the turning tool turret 130 includes a main body 131 provided movably in an XZ axis plane having the Z axis and a predetermined X axis perpendicular to the Z axis with respect to the frame 100; The main body 131 has an XZ-axis second drive unit 133 that can be driven and positioned within the XZ-axis plane. The main body 131 has a predetermined Y axis that intersects the X axis and is orthogonal to the XZ axis plane. The main body 131 is provided with a tool holder 132 that detachably holds a cutting tool 134 as a cutting tool. In addition to the cutting tool, various tools can be detachably held on the tool holder 132.

  The XZ axis first drive unit 123, the XZ axis second drive unit 133, the drive motor 113, and the drive motor 125 are electrically connected to the control device 140. The control device 140 is composed of a computer, and based on various machining programs stored in a storage device (not shown), an XZ axis first drive unit 123, an XZ axis second drive unit 133, a drive motor 113, and Each drive motor 125 is controlled. The machining program is created by a known machining program creation unit (not shown) included in the control device 140 based on the shape information including the material shape information before machining the workpiece and the final machining shape, and the tool information. Is. Note that the shape information including the material shape information before the workpiece is machined, the final machining shape, and the like, and the tool information are input to the control device 140 by an input device (not shown). The control device 140 corresponds to control means.

Now, the operation of the combined machining apparatus S configured as described above will be described.
(1) Simultaneous rough machining A case in which rough machining is simultaneously performed on the peripheral surface of a shaft-shaped workpiece 150 having a circular cross section by a milling cutter 124 and a cutting tool 134 will be described. The control device 140 includes an XZ-axis first drive unit 123, an XZ-axis second drive unit 133, a drive motor 113, and a drive motor 125 based on a machining program for roughing both the milling cutter 124 and the cutting tool 134. To control each.

  In the machining program for rough machining, the feed speed moving in the Z-axis direction is set faster than in finishing machining, and the cutting depth moving in the X-axis direction is made deeper than in finishing machining. Is set to

  Further, the control device 140 controls the rotation of the drive motor 113 so that the number of rotations per minute of the workpiece 150 becomes the number of rotations per minute of roughing in turning in the simultaneous machining of roughing. The number of revolutions per minute of the roughing workpiece 150 is smaller than the number of revolutions per minute of the finishing workpiece 150. In this case, the cutting tool 134 as a turning tool is prepared for roughing and is held by the tool holder 132.

  FIG. 2B is a schematic diagram in the case of simultaneous rough machining. As shown in the figure, the XZ-axis first drive unit 123 and the XZ-axis second drive unit 133 are controlled by the control device 140, so that the milling cutter 124 and the bite 134 are replaced with a shaft-shaped workpiece. The peripheral surfaces of the workpiece 150 are simultaneously rough-machined by moving in the XZ axis plane from opposite sides of the 150 peripheral surfaces.

  An outline of mill turning by the milling cutter 124 for the shaft-shaped workpiece 150 as described above will be described with reference to FIGS. 7 is a characteristic diagram of the cutting edge temperature in mill turning and turning (turning), FIG. 8 is a schematic diagram showing mill turning by the milling cutter 124 with respect to the workpiece 150, FIG. 9 is a schematic diagram viewed from the same plane, and FIG. It is an AA sectional view taken on the line.

  As shown in FIGS. 8 and 9, the milling cutter 124 moves along the Z-axis direction (denoted as the rotating tool traveling direction in the drawings). In this case, as shown in FIG. 9, a portion of the cutting range h is cut by a rotary tool (for example, a milling cutter 124) with respect to the workpiece 150 circumferential surface, and as shown in FIG. 10, the workpiece 150 circumferential surface has a cross section. Is formed into a polygon. The polygon becomes closer to a perfect circle as the rotational speed per minute around the spindle of the workpiece 150 becomes slower than the rotational speed per minute of the rotary tool (for example, the milling cutter 124). Then, since the cutting edge temperature of the milling cutter 124 that performs mill turning is intermittent, as shown in FIG. 7, the cutting edge temperature is lower than the cutting edge temperature of the cutting tool 134 that performs turning (turning) as continuous processing. And since mill turning is a process by a rotary tool, there exists an advantage by which a chip is cut | disconnected reliably.

Here, the advantage of the present embodiment will be described with a calculation example of the conventional processing method and a calculation example of the present embodiment.
(Calculation example of conventional processing method)
As an example of the conventional processing method, an example shown in FIG. In this case, machining exceeding the output (kW) of the motor M that rotates the workpiece 10 cannot be performed. If the output of the motor M is 10 kW and the workpiece 10 is iron, and the volume (chip removal amount) that can be removed per 1 (kW) · 1 (min) by turning is about 25 cc / min · kW, In the motor M having an output of 10 kW, the volume (chip removal amount) that can be scraped in one minute is 25 cc / min · kW × 10 kW = 250 cc / min. In FIG. 2 (a), two turning tools are assumed. However, when the output of the motor M is 10 kW, the amount of chip removal that can be removed in one minute by one turning tool is as follows. It can be 250 cc / min.

(Calculation example of this embodiment)
On the other hand, if the output of the drive motor 125 of the milling cutter 124 is 7 kW and the output of the drive motor 113 is 10 kW, the total output of both motors that can be used to process the workpiece 150 is 7 kW + 10 kW = 17 kW.

  As can be seen from this, in the calculation example in the above-described conventional example, when turning only with the cutting tools 20 and 30 (turning tools) in FIG. 2A, the output of the motor that can be used to machine the workpiece 10 is In contrast to 10 kW, it is clear that efficient processing can be performed in the calculation example of this embodiment.

  Here, as a calculation example of the present embodiment, if the workpiece 150 is iron, the volume that can be removed per 1 (kW) · 1 (min) by the milling cutter 124 (rotary tool) is approximately 20 cc / min · kW. In the drive motor 125 with an output of 7 kW, the volume (chip removal amount) that can be scraped in one minute is 20 cc / min · kW × 7 kW = 140 cc / min. In addition, it is possible to set the amount of chip removal that can be scraped in one minute as described above to 250 cc / min with one cutting tool 134 (turning tool).

  Then, in the calculation example of the present embodiment, in the case of simultaneous machining with the cutting tool 134 (turning tool) and the milling cutter 124 (rotating tool), the amount of chip removal per unit time is the amount of chip removal 250 cc / of the turning spindle. It is 390 cc / min which added min and the chip removal amount 140 cc / min with the milling cutter 124. As a result, the machining efficiency is better than the machining using only the output of the motor M in the conventional example.

The machining conditions of the milling cutter 124 (rotating tool) can be matched to the turning conditions of the cutting tool 134 (turning tool).
(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. In addition, about the same structure as 1st Embodiment, the same code | symbol is attached | subjected, the description is abbreviate | omitted and it demonstrates centering on a different location. FIG. 3A is a schematic diagram when roughing and finishing are simultaneously performed by turning, FIG. 3B is a schematic diagram of simultaneous machining of mill turning and turning (turning) according to the second embodiment, and FIG. FIG. 5 is an explanatory diagram showing comparison of various processing times of processing on a workpiece, and FIGS. 5A to 5B are explanatory diagrams showing surface roughness when various types of processing are performed. FIG. 6 is an explanatory diagram of machining with a turning tool when tool change is performed by an automatic tool changer (ATC).

  The hardware configuration of the second embodiment is the same as that shown in FIG. 3B except that the cutting tool 134 is replaced by a finishing tool 144 instead of the roughing tool. . The storage device (not shown) of the control device 140 includes a machining program for rough machining for driving and controlling the XZ-axis first drive unit 123 and the drive motor 125 of the milling cutter 124, and an XZ-axis second drive unit 133. A machining program for finishing machining that drives and controls is stored. The control device 140 drives and controls the XZ axis first drive unit 123 and the XZ axis second drive unit 133 simultaneously based on both machining programs.

  In the machining program for rough machining, the feed speed moving in the Z-axis direction is set faster than in finishing machining, and the cutting depth moving in the X-axis direction is made deeper than in finishing machining. Is set to In the machining program for finishing machining, the feed speed moving in the Z-axis direction is set slower than in rough machining, and the cutting depth moving in the X-axis direction is made shallower than in rough machining. Is set to

  In addition, the control device 140 determines that the number of revolutions per minute of the workpiece 150 is the number of revolutions per minute of finishing in turning (> the number of revolutions per minute of roughing) in simultaneous machining of roughing and finishing. The rotation of the drive motor 113 is controlled so that

  As a result, in the second embodiment, the XZ axis first drive unit 123 and the XZ axis second drive unit 133 are controlled by the control device 140. As a result, as shown in FIG. 3B, the milling cutter 124 and the cutting tool 144 are respectively moved in the XZ axis plane from the opposite sides of the peripheral surface of the shaft-shaped workpiece 150 to the peripheral surface of the workpiece 150. Roughing and finishing are performed simultaneously.

(General roughing and finishing methods)
Here, a general machining method in which rough machining and finishing machining are sequentially performed on a shaft-shaped workpiece instead of simultaneous machining will be described.

  In a general machining method, turning roughing is performed with a turning tool for roughing as shown in FIG. 6A (turning roughing process), and an automatic tool changer (see FIG. 6B). After the turning tool for roughing is replaced with a turning tool for finishing by ATC) (replacement process), turning finishing is performed as shown in FIG. 6C (turning finishing process). In the figure, W is a workpiece, K1 is a roughing turning tool (bite), and K2 is a finishing turning tool (bite). In this processing method, it is necessary to change the turning tool by the automatic changer, and there is a limit to shortening the processing time.

  In order to solve this problem, a turning method in which roughing and finishing are simultaneously performed is considered. Fig.3 (a) is a schematic diagram in the case of performing a turning process simultaneously with a pair of tool posts. In this example, a tool post (not shown) is provided above and below a specific Z axis, and each tool post is provided with a roughing tool 20 and a finishing tool 30 as a turning tool.

  Normally, machining conditions differ between roughing and finishing, and when roughing and finishing are performed separately, roughing slows down the peripheral speed V (m / min) of the workpiece compared to finishing ( The feed speed f (mm / rev) is increased.

  However, as shown in FIG. 3 (a), when roughing and finishing are performed at the same time, the rotational speed N per minute of the workpiece W (that is, the peripheral speed V of the workpiece) is the machining condition in the roughing, It is necessary to match either of them depending on the finishing processing conditions.

  Here, if the roughing is matched with the workpiece peripheral speed V (m / min), which is the finishing processing condition, the processing conditions become severe for the roughing tool 20, so that the finishing processing is rough processing. It is better to match the workpiece peripheral speed V (m / min). However, in such a case, a problem may occur in the quality of the processed surface.

  As two comparative examples, for a shaft-shaped workpiece (Φ100 mm × length 50 mm), the general shaft machining P shown in FIG. 6 and the simultaneous machining Q shown in FIG. FIG. 4 shows the measurement results of the machining time when finishing is performed together.

As the combined processing apparatus, “INTEGREX200III” which is the manufacturing apparatus of the applicant was used.
(1) General shaft processing P (Comparative Example 1)
The peripheral speed V of the roughing workpiece by turning V = 150m / min, the feed speed f = 0.3mm / rev
The peripheral speed V of finishing work by turning V = 250m / min, feed speed f = 0.1mm / rev
(2) Simultaneous processing Q shown in FIG. 3A (finishing processing according to roughing conditions) (Comparative Example 2)
Peripheral speed V = 150m / min for roughing and finishing workpieces
Roughing tool feed speed f = 0.3mm / rev
Finishing tool feed speed f = 0.1 mm / rev
In the simultaneous machining Q shown in FIG. 3A, the feed speeds of the rough machining tool and the finishing tool are the same as those of the general shaft machining P. In FIG. 4, α is a time required for the turning roughing in the simultaneous machining Q, and β is a time required for the turning finishing in the simultaneous machining Q. The time domain of β partially overlaps with the time domain of α. As shown in FIG. 4, in the simultaneous machining Q (finishing machining according to rough machining conditions) shown in FIG. 3A, the tool change time can be omitted, but the time β required for the turning finishing machining in the simultaneous machining Q Is longer than the turning finishing time of general shaft machining P. The reason for this is that the simultaneous machining Q is slower than the peripheral speed of the work for finishing the general shaft machining P. Thus, in the case of simultaneous machining Q, if the peripheral speed V of the workpiece is machined in accordance with the rough machining conditions, the machining time for finishing becomes long, resulting in a short time for shortening, which is not sufficient. The machining time of the above simultaneous machining Q is when the conditions are suitable, and if the peripheral speed and the feed rate are not preferred, it may take more time than general shaft machining.

  Next, the simultaneous machining R in FIG. 4 is a first example executed in the second embodiment by adopting the peripheral speed of the workpiece for finishing by turning in the general shaft machining P described above. The workpiece is the same size and material as those of Comparative Examples 1 and 2. As the combined processing apparatus, “INTEGREX200III”, which is the manufacturing apparatus of the applicant, was used.

  In FIG. 4, the time domain for roughing with the rotary tool is not shown. This is because the feed speed f of the rotary tool can be freely set to the same value as Comparative Examples 1 and 2, or larger than Comparative Examples 1 and 2, so the same time as Comparative Examples 1 and 2 or Comparative Example Since a time shorter than 1 and 2 is required and the time region overlaps with the time region of finishing with a turning tool, it is omitted for convenience of explanation.

  As shown in FIG. 4, in the case of simultaneous machining of mill turning and turning (turning), the machining can be performed in accordance with the peripheral speed of the workpiece, which is a machining condition for finishing. For this reason, rough machining by mill turning and finishing with a turning tool can be performed simultaneously. The machining time in this case is the same as the finishing time in general shaft machining P. In other words, machining time can be greatly reduced.

  In mill turning, the cross-sectional shape of the workpiece becomes polygonal, but the problem of polygonal-> circular and polygonal shape can be improved by simultaneous finishing. In addition, the processing time is lost because of simultaneous processing.

Next, in the second embodiment, a second example in which simultaneous machining is performed under the following machining conditions will be described. At the same time, the processing conditions of Comparative Example 3 and Comparative Example 4 are also shown below.
(Processing conditions)
As the combined processing apparatus, “INTEGREX200III”, which is the manufacturing apparatus of the applicant, was used, and a workpiece (Φ100 mm × length 50 mm) having a shaft shape of material S10C was used.

1. Comparative Example 3
In Comparative Example 3, a turning process of only roughing is executed.
The peripheral speed V of the roughing workpiece by turning is V = 180 m / min, the feed speed f = 0.35 mm / rev, and the cutting depth d = 0.7 mm.
2. Comparative Example 4
In Comparative Example 4, as in Comparative Example 1, general shaft processing was performed.

○ Roughing workpiece V for roughing by turning V = 180m / min, feed rate f = 0.35mm / rev, cutting depth d = 0.7mm
○ The peripheral speed V of finishing work by turning V = 250m / min, feed speed f = 0.2mm / rev, cutting depth d = 0.2mm
3. Second embodiment ○ Workpiece peripheral speed V = 250 m / min
○ Feeding speed of rotating tool f = 0.35mm / rev, cutting depth d = 0.7mm
○ Turning tool feed speed f = 0.2 mm / rev, cutting depth d = 0.2 mm
The surface roughness as a result of machining the workpiece under the above machining conditions is Ra 0.93 and Rz 4.7 in Comparative Example 3, Ra 0.34 and Rz 2.6 in Comparative Example 4, and Ra 0. 45 and Rz3.5. In addition, Ra and Rz have shown the surface roughness represented by JIS0601-2001 (ISO4287-1997 implementation), Ra shows arithmetic height and Rz has shown the maximum height. 5A to 5B are cross-sectional views of the surface of the workpiece showing the surface roughness of Comparative Example 3, Comparative Example 4, and Second Example, respectively.

  As described above, it was confirmed that the surface roughness in the second example was almost the same as that of the comparative example 4. Further, in Comparative Example 4, the total processing time required for roughing and finishing took 18 seconds, whereas the processing time in the second example can be performed in 8 seconds. Was confirmed.

In addition, embodiment of this invention is not limited to the said embodiment. For example, the following may be used.
In addition, a rotary tool is not limited to a milling machine, For example, an end mill may be sufficient.

  In each of the above embodiments, the rotary tool tool post 120 is moved in the XZ axis plane by the XZ axis first drive unit 123. However, the present invention is not limited to this. Instead of the XZ-axis first drive unit 123, an XYZ-axis drive unit is provided to set a specific Y-axis orthogonal to the X-axis and the Z-axis. After moving along the Y axis, move in the XZ plane, or fix the X axis and move to the YZ plane, and cut the peripheral surface of the workpiece 150 with a rotary tool. It may be.

 In the above embodiment, the turning tool tool post 130 is moved in the XZ axis plane by the XZ axis second drive unit 133. However, the present invention is not limited to this. Instead of the XZ-axis second drive unit 133, an XYZ-axis drive unit is provided to set a specific Y-axis orthogonal to the X-axis and the Z-axis. After moving along the Y axis, move in the XZ plane, or fix the X axis and move to the YZ plane, and cut the peripheral surface of the workpiece 150 with a rotary tool. It may be.

The schematic diagram which shows the whole complex processing apparatus of 1st Embodiment. (A) is a schematic diagram in the case of performing simultaneously with a pair of turning tools, (b) is a schematic diagram of simultaneous machining of mill turning and turning (turning) according to the first embodiment. (A) is a schematic diagram when roughing and finishing are simultaneously performed by a pair of turning tools, and (b) is a schematic diagram of simultaneous machining of mill turning and turning (turning) according to the second embodiment. Explanatory drawing which shows the comparison of the various process time of the process with respect to a workpiece | work. (A)-(c) is sectional drawing of the surface of the workpiece | work which shows the surface roughness of the comparative example 3, the comparative example 4, and 2nd Example, respectively. (A) is a schematic diagram of processing with a tool for roughing, (b) is an explanatory diagram of an automatic tool changer (ATC), and (c) is a schematic diagram of processing with a tool for finishing. Characteristics of cutting edge temperature in mill turning and turning. The schematic diagram which shows the mill turning by the milling cutter 124 with respect to the workpiece | work 150. FIG. The schematic diagram similarly seen from the plane. FIG. 10 is a cross-sectional view taken along line AA in FIG. 9.

Explanation of symbols

S ... Compound processing device 110 ... Work holding device (headstock)
DESCRIPTION OF SYMBOLS 111 ... Chuck 120 ... Rotary tool tool post 121 ... Main body 122 ... Tool holder 123 ... X-Z axis 1st drive unit (1st drive mechanism)
DESCRIPTION OF SYMBOLS 130 ... Turning tool tool post 131 ... Main body 132 ... Tool holder 133 ... XZ axis 2nd drive unit (2nd drive mechanism)
140... Control device (control means)
150 ... Work

Claims (4)

Rotate the workpiece on the spindle,
Send the rotary tool tool post provided with the rotary tool at least in the X-axis and Z-axis directions,
A turning tool turret with a turning tool is fed at least in the X-axis and Z-axis directions,
A combined machining method for a machine tool, wherein the peripheral surface of the rotating workpiece is simultaneously machined by the rotary tool and the turning tool. Rotate the workpiece on the spindle,
Send the rotary tool tool post provided with the rotary tool at least in the X-axis and Z-axis directions,
A turning tool turret with a turning tool is fed at least in the X-axis and Z-axis directions,
A machining method for a machine tool, characterized in that roughing with the rotary tool and finishing with the turning tool are simultaneously performed on a peripheral surface of the rotating workpiece. A headstock with a spindle that rotates the workpiece;
A rotary tool turret including a rotary tool and a first drive mechanism that provides feed in at least the X-axis and Z-axis directions;
A turning tool turret including a turning tool and a second drive mechanism for providing feed in at least the X-axis and Z-axis directions;
In order to simultaneously process the peripheral surface of the rotating workpiece with the rotary tool and the turning tool, the first drive mechanism of the rotary tool tool post and the second drive mechanism of the turning tool tool post are simultaneously driven and controlled. A combined machining apparatus comprising a control means. A headstock with a spindle that rotates the workpiece;
A rotary tool turret including a rotary tool and a first drive mechanism that provides feed in at least the X-axis and Z-axis directions;
A turning tool turret comprising a turning tool and a second drive mechanism for providing feed in at least the X-axis and Z-axis directions;
In order to simultaneously perform roughing with the rotary tool and finishing with the turning tool on the peripheral surface of the rotating workpiece, the first drive mechanism of the rotary tool tool post and the first of the turning tool tool post are used. 2. A combined machining apparatus comprising a control unit that simultaneously drives and controls two drive mechanisms.

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