JP2008023611A - Composite nc lathe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a composite NC lathe capable of simultaneously and superposedly executing a cutting-off process, a primary process and a secondary process. <P>SOLUTION: A tool rest 47 is disposed at a position for cutting off a rod material 45 fed from a rod material feeder 46 outside the machine. When executing the cutting-off process, a chuck part 50 synchronized with the rotation of the rod material 45 while gripping the rod material 45 is provided at either one 37 of turret tool rests. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a composite NC lathe, and more particularly, to a composite NC lathe capable of simultaneously performing a parting process for cutting a bar, a primary process, and a secondary process.

  Since the compound NC lathe is equipped with a rotating tool on the turret tool post, various complex processes such as end milling and drilling can be applied to the workpiece in addition to the usual turning process. In recent years, in order to increase machining efficiency, a composite NC lathe in which two spindles and two turret tool posts are arranged to face each other, and a composite NC lathe equipped with two spindles + 3 turret tool rests have been developed. As a conventional technique related to a composite NC lathe, there is Patent Document 1.

Therefore, FIG. 5 shows a machining example in which primary machining and secondary machining are performed on the bar automatically supplied from the bar feeding device in this type of NC lathe (2 main spindles + 2 turret tool post).
In FIG. 5, reference numeral 10 indicates a main spindle, and 12 indicates a sub spindle. Reference numeral 13 denotes a main turret, and reference numeral 14 denotes a sub turret.

  The bar 15 is supplied from an automatic supply device (not shown) so as to pass through the main spindle 10 coaxially. The main spindle 10 grips a bar with a chuck 16, and performs external processing on the bar 15 as a primary process with a tool of the main turret 13. In the sub spindle 12, the rod that has undergone the primary processing is gripped by the chuck 18, and processing is performed as secondary processing with the tool on the sub turret 14 side.

By the way, the bar 15 which has finished the primary processing by the main spindle 10 is cut by parting as shown in FIG.
In FIG. 6, the bar 15 is gripped by the chuck 18 on the sub spindle 14 side, and the bar 15 is rotated with the main spindle 10 in a state of both grips, and the parting process is performed by the parting tool 20 on the main turret 13 side. Is going. After the cut-off process is completed, as shown in FIG. 5, the primary process is performed on the main spindle 10 side and the secondary process is performed on the sub spindle 12 side.
JP 2003-340601 A

  Conventionally, during the parting process, as shown in FIG. 6, the chucks 16 and 18 are held between the main spindle 10 and the sub spindle 12, and during that time, the secondary process is performed on the sub turret 14 side. There is a problem that can not be done. In particular, when the bar 15 has a large diameter, it takes time for parting off, resulting in loss time and lowering the machining efficiency.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a composite NC lathe that solves the problems of the prior art and can perform parting, primary processing, and secondary processing simultaneously by polymerization. .

  In order to achieve the above-mentioned object, the present invention provides a composite NC lathe having two main shafts arranged opposite to each other and at least two turret tool rests, and a bar supplied from a bar supply device outside the machine. A tool post dedicated to parting off is placed at the position where parting is performed on the material, and when performing parting off, the chuck unit that synchronizes with the rotation of the bar while holding the bar is attached to any one turret tool post. Installed on the opposite side of the chuck part of the turret tool post at the same time as cutting off while holding the bar with the chuck part of the turret tool post while rotating the bar on the bar supply device side It is characterized in that it can be processed by a tool and other turret tool post.

  According to the present invention, a tool post for performing a parting process is provided separately from the turret tool post, and the part can be cut off while holding the bar with the chuck portion of the turret tool post, so the spindle occupies the parting process. Therefore, the parting process, the primary process, and the secondary process can be polymerized at the same time.

Hereinafter, an embodiment of a composite NC lathe according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic plan view of a composite NC lathe according to the present embodiment. In this composite NC lathe, a first spindle stock 30 and a second spindle stock 32 are arranged on a bed 31 so as to face each other. In this composite NC lathe, the linear axes are the X axis, the Y axis, and the Z axis. The first head stock 30 is fixed on the bed 31. The second head stock 32 is installed to be movable in the X-axis direction and the Z-axis direction. The first head stock 30 has a main spindle 33, and the C1 axis controls the rotational position of the main spindle 33. A chuck 34 is attached to the tip of the main spindle 33, and the main spindle 33 holds a workpiece W1 to be subjected to primary processing. The second head stock 30 has a sub spindle 35, and the linear axis is the X3 axis, the Z3 axis, and the rotation axis is the C2 axis. A chuck 36 that holds a workpiece W2 to be subjected to secondary processing is attached to the tip of the sub spindle 35.
The composite NC lathe according to this embodiment is a lathe in which two turret tool rests are arranged. In FIG. 1, reference numeral 37 indicates a first turret tool post, and reference numeral 38 indicates a second turret tool post. A first spindle stock 30 and a second spindle stock 32 are arranged in the middle of the first turret tool post 37 and the second turret tool post 38 in the Y-axis direction.

  The first turret tool post 37 includes a main turret head 39 that revolves around a revolving axis T2 parallel to the Z axis. The first turret tool post 37 is configured to be movable up and down, front and rear, and left and right, with three axes of the X1, Y1 and Z1 axes as control axes. Similarly, the second turret tool post 38 includes a sub turret head 40 that revolves around a revolving axis T2 that is parallel to the Z axis, and the three axes of the X2, Y2, and Z2 axes are used as control axes, up and down, front and rear, It is configured to be movable in the left-right direction.

  The main turret head 39 and the sub turret head 40 can be mounted with various tool holders at a plurality of positions equally divided in the circumferential direction. In FIG. 1, tool holders 41 and 42 that are 180 degrees symmetrical with respect to the main turret head 39 are illustrated. In the subturret head 40, a tool holder 43 is shown.

  In FIG. 1, reference numeral 45 indicates a bar. This bar 45 is supplied from a bar supply device 46. Reference numeral 47 indicates a tool post that performs a cut-off process on the bar supplied from the bar supply device 46. In this embodiment, the tool post 47 is a tool post dedicated to parting-off processing, and a parting tool 48 is attached thereto. The E axis moves the tool post 47 in a direction parallel to the X axis. The tool post 47 is installed at a position away from the position where the primary machining and the secondary machining are performed on the workpieces W1 and W2 of the main spindle 33 and the sub spindle 35.

  The tip of the bar 45 is gripped by a pick-off chuck 50 attached to the tool holder 41 of the main turret head 39, and the pit-off chuck 50 remains gripping the bar 45. The chuck can be rotated in synchronization with the rotation of the bar 45. The bar supply device 46 includes a bar rotation mechanism 51, and can rotate the bar 45 at a rotational speed necessary for the cut-off process.

  The composite NC lathe according to the present embodiment is configured as described above. Next, the operation thereof will be described.

  In the composite NC lathe according to the present embodiment, as shown in FIG. 2, a parting process for the bar 45, a primary process for the work W1 on the main spindle 33 side, and a secondary process for the work W2 on the sub spindle 35 side are performed. Tripolymerization can be performed.

  In FIG. 2, a double revolving unit 52 is attached to the main turret head 39 as a tool holder, and end mills 54 and 55 are attached in parallel and opposite directions to the Z axis. A double turning holder 56 is attached to the sub turret head 40 as a tool holder, and tools 57 and 58 are attached.

  Therefore, the first turret tool post 37 is moved to the position shown in FIG. At this position, the tip of the bar 45 is gripped by the pick-off chuck 50 of the main turret head 39. The main spindle 33 and the sub spindle 35 are in a position facing each other.

  Then, when the bar rotation mechanism 51 of the bar supply device 46 is activated and the bar 45 is rotated at a predetermined rotation speed, the bar 45 rotates while being held by the pick-off chuck 50. At this time, the tool post 47 is fed by the E axis and cut off by the cut-off tool 48 in the radial direction of the bar 45 to perform cut-off processing.

Simultaneously with this parting-off processing, the workpiece W1 is rotated by the main spindle 33, and the workpiece W1 is turned while the tool 57 of the sub turret head 40 is fed along the X2 axis and the Z2 axis, and the outer diameter machining can be performed.
Further, in parallel with these processes, the inner diameter of the work W2 of the sub spindle 35 can be processed by the end mill 55 of the main turret head 39.

  As described above, it is possible to realize the three-over process including the primary processing of the workpiece W1 and the secondary processing of the workpiece W2 while performing the cut-off processing.

When the cut-off process is completed, the cut bar is held by the pick-off chuck 50, and the process proceeds to the process shown in FIG.
In FIG. 3, the sub-spindle 35 is moved to a position coaxially opposed to the main spindle 33, and the main turret head 39 uses the two end mills 54 and 55 of the double revolving unit 52 at the same time, respectively. Inner diameter machining is performed on W2. At this time, the workpiece W1 is subjected to outer diameter processing by the cutting tool 61 attached to the turning holder 60 of the sub turret head 40 simultaneously with inner diameter processing by the end mill 54.

  As described above, when the secondary machining of the workpiece W2 is completed, the workpiece W2 is extracted from the chuck 36 of the sub spindle 35. Then, the workpiece W1 is gripped by the chuck 36 of the sub spindle 35, the gripping state of the chuck 34 of the main spindle 33 is released, and the workpiece W1 can be replaced with the sub spindle 35 for secondary processing.

  After that, the main turret head 39 turns to perform an operation of inserting the bar material cut by the above-described cut-off process into the chuck 34 of the main spindle 33. Thereafter, the cut-off bar materials are processed in the order shown in FIGS. The primary processing and secondary processing are repeated.

  FIG. 4 is a diagram illustrating another example of processing after parting. In FIG. 4, the turning holder 62 is indexed in the main turret head 39. The workpiece W1 rotated by the main spindle 33 is simultaneously subjected to outer diameter processing by the cutting tool 63 on the main turret head 39 side and the cutting tool 57 on the sub turret head side. The outer diameter of the W2 rotated by the sub spindle 35 is processed by a bit 58 on the sub turret side.

  Although the present invention has been described with reference to the preferred embodiment, the processing shown in FIGS. 2 to 4 is an example of processing, and the main turret head 33 and the sub turret head have various tooling variations. Therefore, desired primary processing and secondary processing can be performed by an optimal combination. In the embodiment, a lathe with 2 spindles + 2 turrets turret is taken as an example, but it can be applied to a lathe with 2 spindles + 3 turrets.

The schematic plan view which shows one Embodiment of the composite NC lathe by this invention. Operation | movement explanatory drawing of the parting-off process example in the composite NC lathe. Explanatory drawing of processing operation in the composite NC lathe. Explanatory drawing of processing operation in the composite NC lathe. Explanatory drawing of processing operation of the conventional compound NC lathe. Explanatory drawing of parting off operation in the conventional compound NC lathe.

Explanation of symbols

Reference Signs List 30 First spindle stock 31 Bed 32 Second spindle stock 33 Main spindle 35 Sub spindle 37 First turret tool post 38 Second turret tool post 39 Main turret head 40 Sub turret head 45 Bar material 46 Bar material supply device 47 Tool post 48 Parting tool 50 Pick-off chuck

Claims (3)

In a composite NC lathe having two main shafts arranged opposite to each other and at least two turret tool posts,
A tool post is arranged at a position where the bar material supplied from the bar material supply device outside the machine is cut off, and a chuck portion that synchronizes with the rotation of the bar material while holding the bar material when performing the cut-off process. Provided on any one turret tool post, while rotating the bar on the bar supply device side, while performing the parting process by the tool post while gripping the bar with the chuck portion of the turret tool post, A composite NC lathe capable of performing processing with a tool attached to the opposite side of the chuck portion of the turret tool post and processing with another turret tool post.   The turret tool post includes a main turret tool post that is movable with respect to three axes of X axis, Y axis, and Z axis, and a sub-main turret tool post that is movable with respect to at least two axes of X axis and Z axis, The composite NC lathe according to claim 1, wherein the chuck portion is provided on a main turret tool post.   3. The tool post according to claim 2, wherein the tool post is a tool post dedicated to parting-off processing, is disposed in a cutting area adjacent to the main turret tool post, and is movable in parallel with at least the X axis. Compound NC lathe.

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