JP5852545B2 - Double-head internal grinding machine - Google Patents

Description

  The present invention relates to a pair of grindstone spindle heads, a work table movable in the left-right direction and the front-rear direction, and a double-head internal grinding apparatus having a pair of grindstones. The double-headed internal grinding device of the present invention is suitable for end face polishing, end face taper, inner face threading, and inner face smooth forming of cylindrical workpieces such as steel pipes, aluminum pipes, stone pipes, engineering plastic pipes, and ceramic pipes.

  Cylindrical workpiece composite internal grinding devices are known. For example, Okamoto Machine Tool Mfg. Co., Ltd. has introduced an internal grinding machine IGM15NC (trade name) with a two-tool axis specification that can machine the throwing hole, end face, taper, and peripheral machining without changing the setup with two parallel tool spindles. ) (See, for example, Non-Patent Document 1 and FIG. 2 of Patent Document 4).

  In addition, Japanese Utility Model Publication No. 39-30515 (Patent Document 1) has a pair of work spindle heads opposed to both ends of a bed, and a grinding wheel spindle feed tool table placed on the bed. A double-headed internal grinding machine with a grinding wheel head with a grinding wheel spindle at both ends is presented. To grind a workpiece using this double-head internal grinding machine, first attach the workpiece to the workpiece spindle head at the left end, and then move the grinding wheel spindle feed tool table to the left and move it to the left grinding wheel spindle. Performs internal grinding of the workpiece. While the left workpiece is being ground, the workpiece can be attached to the workpiece spindle head at the right end. After the grinding of the left workpiece is completed, the grinding wheel spindle feed tool table is moved to the right, and the inner grinding of the right workpiece is performed with the right grinding wheel spindle. Meanwhile, it is carried out by removing the ground left workpiece from the workpiece spindle head.

  Furthermore, Chinese utility model publication No. 200008151 utility model manual (Patent Document 2), China utility model publication No. 201076938 utility model manual (Patent Document 3) and Japanese Patent Application Laid-Open No. 2010-172985 (Patent Document 4) are: As shown in FIG. 2, a pair of tool spindle heads 100 and 101 are placed on a tool table 102 movable in the left-right direction so as to oppose the left and right ends of the bed 4, and the workpiece mounted on the bed. A double-headed internal grinding device with a rotating holder 300 is presented. In order to grind a workpiece using this double-head internal grinding device, the workpiece 200 is mounted on the workpiece rotation holder 300, and then the tool table 102 is moved to the left or right so as to approach the end of the workpiece. Grinding the inner surface of the workpiece at the same time or separately with the tool (grinding wheel or milling tool) at the head of the tool spindle at both the left and right ends.

  This double-headed internal grinding machine can simultaneously machine the workpiece end surface and inner surface using a pair of tool spindles from both ends of the cylindrical workpiece. Have.

Japanese Utility Model Publication No. 39-30515 China Utility Model Notice No. 200808151 Utility Model Manual China Utility Model Notice 20101076938 Utility Model Manual JP 2010-172985 A

Published by Okamoto Machine Tool Co., Ltd., “Product Guide -GRIND-X” catalog, 9 pages, published January 3000, 2008

  The double-sided internal grinding apparatus described in Patent Literature 2, Patent Literature 3 and Patent Literature 4 has a large machine installation area (footprint) compared to the double-sided internal grinding machine described in Patent Literature 1, and a complicated shape. Is difficult to grind.

  The inventors of the present application have the advantage that the workpiece rotating shaft of the double-sided internal grinding apparatus described in Patent Documents 2 to 4 is free of swinging, and the tool holder table has a lateral feed, a forward / backward feed, and a swivel feed. We found that it was possible to compensate by controlling the feed, and that the footprint could be reduced by controlling the left / right feed of the work holder table and the left / right feed of only one grindstone spindle head.

  Furthermore, in order to improve the dimensional accuracy of the workpiece to be machined, a pair of grindstone dressers was provided at the left and right ends of the workpiece holder table.

The double-head internal grinding device (1) of the invention of claim 1 comprises:
A pair of a fixed type first grindstone spindle head (100) and a laterally movable second grindstone spindle head (101) are installed opposite to both ends of the bed (4), and
On the bed (4), a grindstone base (102a) for mounting the second grindstone spindle head (101) and a left and right feed first work holder table slider (102b _sy ) for mounting a swivel fixed work holder (200). Are mounted on a pair of guide rails (102c, 102c) provided in parallel in the left-right direction (Y-axis),
A first work holder fixing base (102b _f1 ) is provided on the left and right feed first work holder table slider (102b _sy ), and a front and rear direction (X) is provided on the first work holder fixing base (102b _f1 ). A second work holder that is mounted with a fixed base (102b _fy ) that fixes a pair of guide rails (102d, 102d) provided in parallel with each other and slides back and forth on the pair of guide rails (102d, 102d). table slider _{(102 sx)} is mounted, the second workpiece holder fixing stand on the second workpiece holder table slider _{(102 sx)} (102b _fw) is provided, the second workpiece holder fixing base (102b _fw) It provided the turning fixed work holder (200) mounting the turntable (102b _r) above Equipped with a pivot fixed work holder (200) on the mounting turntable (102b _r) constitutes a workpiece (102),
Telescopic covers (103l, 103r) that cover parts of the pair of guide rails (102c, 102c) are provided at the left end and the right end of the first work holder table slider (102b _sy ),
A pair of grindstone dressers (5l, 5r) are provided at the rear end of the left end and the right end of the mounting swivel table (102b _r ),
and,
The grinding wheel spindle center of the first grinding wheel spindle head (100), the grinding wheel spindle center of the second grinding wheel spindle head (101), the workpiece C axis rotation axis of the swivel fixed work holder (200), A numerical controller (CPU) having a memory for storing a machining program in which the pivot axis (200C) is located on the same plane;
In the double-headed internal grinding device (1).

  The workpiece rotation axis (C) is controlled by controlling the feed of the second grindstone spindle head (101) in addition to the left and right direction (Y axis) feed and the back and forth direction (X axis) feed and the swivel feed of the swivel fixed work holder (200). The first grindstone spindle head (100) and the laterally movable second grindstone spindle head (101) with respect to the shaft) can be aligned. In addition, by adopting a left-right feed system for the work holder table slider and a left-right feed system for only one of the second grindstone spindle heads (101) that is movable in the left-right direction, the cylinders with different lengths can be suppressed while the footprint is suppressed. It can also be used for machining of workpieces. The workpiece can move between the two grindstone spindle heads (100, 101), and the workpiece to be ground can be machined one by one on the left end or right end side. Further, since the turning fixed type work holder (200) can be turned in the horizontal direction, work such as taper diameter enlargement processing, R grinding and grooving processing of the work becomes easy.

It is a top view of the double-head internal grinding apparatus of this invention. It is a front view of a double-headed inner surface cylindrical grinding apparatus. (Known)

  Hereinafter, the present invention will be described in more detail with reference to FIG. Note that FIG. 1 is disclosed with the hermetic cover device omitted.

  A double-head internal grinding device (1) shown in FIG. 1 includes a fixed first grindstone spindle head (100) fixed to a grindstone head (4a) opposite to both ends of a bed (4) and a laterally movable type. A pair of second grinding wheel spindle heads (101) are installed, and a work stage (102) capable of moving in the left-right direction, moving in the front-rear direction and turning is provided. The grinding wheel spindle head (100, 101) supports the grinding wheel (100g, 101g) rotatably on the grinding wheel shaft (100a, 101a). The present patent applicant can provide 10 types of grindstones corresponding to the workpiece shape.

  The grinding wheel shaft (100a) of the first grinding wheel spindle head (100) and the grinding wheel shaft (101a) of the second grinding wheel spindle head (101) are rotationally controlled by an AC spindle motor and a high frequency spindle inverter.

On the bed (4), a grindstone base (102a) for mounting the second grindstone spindle head (101) and a left and right feed first work holder table slider (102b _sy ) for mounting a swivel fixed work holder (200). Are mounted on a pair of guide rails (102c, 102c) provided in parallel in the left-right direction (Y-axis). The first work holder table slider (102b _sy ) is a screwed body (102 _box ) provided at the bottom of the first work holder table slider (102b _sy ) when the ball screw (102bs) receives the rotational drive of the AC servo motor (M ₁ ). ) Move left or right. The left direction or the right direction depends on the rotation direction of the rotation shaft of the AC servo motor (M ₁ ).

A telescopic cover (103l, 103r) that covers a part of the pair of guide rails (102c, 102c) is provided at the left end and the right end of the first work holder table slider (102b _sy ). A telescopic cover (103e) is also provided at the left end of. The telescopic cover is generally used in the machine tool industry to protect important parts inside the machine tool from grinding scraps and cutting oil, and can be obtained from Meiki Co., Ltd. Enomoto BAE Co., Ltd.

A first work holder fixing base (102b _f1 ) is provided on the left and right feed first work holder table slider (102b _sy ), and a front and rear direction (X) is provided on the first work holder fixing base (102b _f1 ). A fixed base (102t) to which a pair of guide rails (102d, 102d) provided in parallel with each other is fixed is mounted, and the pair of guide rails (1
02d, 102d) is further mounted with a second work holder table slider (102 _sx ) that slides back and forth, and a second work holder fixing base (102b _fw ) is mounted on the second work holder table slider (102 _sx ). A swivel table (102b _r ) for mounting a swivel fixed work holder (200) is provided on the second work holder fixing base (102b _fw ), and a swivel fixed type is mounted on the swivel table for mounting (102b _r ). The work stage (102) is configured by mounting the work holder (200).

The left and right edges of the pair of grinding wheel dresser rearward portion (5l, 5r) of the mounting pivot table (102b _r) is provided, which is journalled in the wheel spindle (100a) of the first grinding wheel spindle head (100) grindstone (100g) and the grinding wheel (101g) supported by the grinding wheel shaft (101a) of the second grinding wheel spindle head (101) are made easy.

The mounting swivel table (102b _r ) can be swung around a swivel axis (200c) by a rotary actuator (not shown) ± 30 degrees, and the workpiece (w) can be tapered and grooved. Processing such as processing is easy. The existing single-sided cylindrical grinder IGM2TNC (patent applicant's product grade name) is designed to be able to turn the grinding wheel spindle head.
In the present invention, the workpiece is configured to be rotatable, and it is possible to perform machining such as taper diameter expansion processing, R grinding and grooving of the workpiece.

Further, the second work holder table slider (102b _sx ) receives the rotational drive of the servo motor (M ₂ ) by the ball screw (102bc) and is mounted on the screw fixing base (102fix) provided at the bottom of the second work holder table (102b _sx ). Is moved in the left direction or the right direction to slide on the pair of guide rails (102d, 102d) provided in parallel in the front-rear direction.

  The double-headed internal grinding device (1) includes a grinding wheel spindle center of the first grinding wheel spindle head (100), a grinding wheel spindle center of the second grinding wheel spindle head (101), and the pivot fixed work holder ( 200) a numerical control device (CPU) having a memory for storing a machining program in which the workpiece C-axis rotation axis and the turning axis (200c) are located on the same plane.

  Software for the workpiece machining program and grinding wheel dressing machining program is commercially available from the patent applicant under the name of “EDELAC Win” (registered trademark).

  A process of grinding the inner surface and the end surface of the cylindrical workpiece using the double-head inner surface grinding apparatus (1) will be described below.

  1). A cylindrical workpiece (w) is mounted on the workpiece holder (200) of the double-head internal grinding device (1).

  2). The grindstone (100g, 101g) is supported by the grindstone shaft (100a) of the first grindstone spindle head (100) and the grindstone shaft (101a) of the second grindstone spindle head (101).

  3). The grinding wheel head (102a) on which the second grinding wheel spindle head (101) is mounted is moved manually or electrically in the left or right direction on the pair of guide rails (102c, 102c) and stopped at the grinding start position.

4). When the power of the double-sided internal grinding machine (1) and the numerical control (CPU) that installs the above software “EDELAC Win” (registered trademark) in the memory section are turned on, the machining procedure program is displayed on the numerical controller. In accordance with the screen instructions, the workpiece is selected, direct sizing is set, the processing sequence is assembled, the shape grindstone is selected, and the grindstone dressing program is selected.

  5). When the machining start power supply of the double-sided internal grinding device (1) is turned on, the workpiece grinding start standby position is set according to the instruction of the numerical control (CPU) for mounting the software “EDELAC Win” (registered trademark) in the memory unit. A grindstone axis of the first grindstone spindle head (100), a grindstone axis of the second grindstone spindle head (101), a workpiece C axis rotation axis and a pivot axis (200c) of the swivel fixed work holder (200). Located on the same plane.

  6). Next, rotation of the grindstone shaft (100a) of the first grindstone spindle head is started and rotation of the work holder (200) is also started. In addition, the ejection of the grinding fluid is started from the grinding fluid supply nozzle provided near the first grindstone spindle head (100).

7). The first work holder table slider (102b _sy ) slides in the right direction and comes into contact with the grindstone (100g) of the first grindstone spindle head, and workpiece grinding is started according to the selected machining program procedure. At this time, depending on the selected machining program, the second work holder table slider (102b _sx ) can be moved in the front-rear direction, or the turning table (102b _r ) for turning fixed work holder can be turned within ± 30 degrees. To be implemented. Note that the rotation of the work holder around the C axis may be intermittently performed as well as continuous rotation depending on the shape of the processed part of the work.

8). When grinding of the right portion of the workpiece by the first grindstone spindle head (100) is completed, the first workpiece holder table slider (102b _sy ) slides to the left and returns to the standby position, at which position the pivot axis And the second work holder table slider (102b _sx ) is also returned to the grinding start position. Further, the supply of the grinding fluid ejected from the grinding fluid supply nozzle (not shown) is stopped.

  9). Next, rotation of the grindstone shaft (101a) of the second grindstone spindle head is started and rotation of the work holder (200) is also started. In addition, ejection of the grinding fluid is started from a grinding fluid supply nozzle (not shown) provided near the first grindstone spindle head (101).

10). The first work holder table slider (102b _sy ) slides to the left, contacts the grinding wheel (101g) of the second grinding wheel spindle head, and grinding of the left part of the work is started according to the selected machining program procedure. . At this time, depending on the selected machining program, the second work holder table slider (102b _sx ) can be moved in the front-rear direction, or the turning table (102b _r ) for turning fixed work holder can be turned within ± 30 degrees. To be implemented.

11). When the grinding of the left part of the workpiece by the second grindstone spindle head (101) is completed, the first work holder table slider (102b _sy ) slides to the right and returns to the standby position. And the second work holder table slider (102b _sx ) is also returned to the grinding start position. Further, the supply of the grinding fluid ejected from the grinding fluid supply nozzle is stopped.

12). Depending on the selection of the grinding wheel dressing processing program, the first work holder table slider (102b _sy ) is moved in the right direction or the left direction before, during or after the grinding of the work, and the second work holder table slider. (102b _sx ) is moved forward or backward, and the grindstone (100g, 101g) may be dressed by a movable / falling diamond single stone dresser (5l, 5r).

  13). After completion of the grinding of the workpiece (w), the workpiece that has been ground is removed from the workpiece holder (200) and carried to the outside of the double-head internal grinding device (1).

  The double-headed internal grinding device (1) of the present invention is provided with a turning fixed type work holder (200) for holding a work so that it can be moved left and right, moved back and forth, and turned, and fixed first grinding is performed on the right end side of the work holder. By adopting a structure in which the grindstone shaft head (100) is provided with the movable second grindstone shaft head (101) on the left end side, the length in the left-right direction of the double-headed internal grinding device is set to double-headed in Patent Documents 1 to 3. It was possible to make 80 to 95% of the length of the internal grinding device (1), and the footprint area could be reduced.

1 Double-head internal grinding machine
CPU Numerical control device w Cylindrical workpiece 100 First grinding wheel head 100a First grinding wheel shaft 100g Grinding wheel 101 Second grinding wheel shaft head 101a Second grinding wheel shaft 101g Grinding wheel 200 Work holder 102 Work stage 102b _sy First work holder Table slider 102c Guide Rail 102b _sx second work holder table slider 102d guide rail 102b _r work holder table mounting swivel table 103 telescopic cover 4 beds 5l, 5r whetstone dresser

Claims (1)

A pair of a fixed type first grindstone spindle head (100) and a laterally movable second grindstone spindle head (101) are installed opposite to both ends of the bed (4), and
On the bed (4), a grindstone base (102a) for mounting the second grindstone spindle head (101) and a left and right feed first work holder table slider (102b _sy ) for mounting a swivel fixed work holder (200). Are mounted on a pair of guide rails (102c, 102c) provided in parallel in the left-right direction (Y-axis),
A first work holder fixing base (102b _f1 ) is provided on the left and right feed first work holder table slider (102b _sy ), and a front and rear direction (X) is provided on the first work holder fixing base (102b _f1 ). A second work holder that is mounted with a fixed base (102b _fy ) that fixes a pair of guide rails (102d, 102d) provided in parallel with each other and slides back and forth on the pair of guide rails (102d, 102d). table slider _{(102 sx)} is mounted, the second workpiece holder fixing stand on the second workpiece holder table slider _{(102 sx)} (102b _fw) is provided, the second workpiece holder fixing base (102b _fw) It provided the turning fixed work holder (200) mounting the turntable (102b _r) above Equipped with a pivot fixed work holder (200) on the mounting turntable (102b _r) constitutes a workpiece (102),
Telescopic covers (103l, 103r) that cover parts of the pair of guide rails (102c, 102c) are provided at the left end and the right end of the first work holder table slider (102b _sy ),
A pair of grindstone dressers (5l, 5r) are provided at the rear end of the left end and the right end of the mounting swivel table (102b _r ),
and,
The grinding wheel spindle center of the first grinding wheel spindle head (100), the grinding wheel spindle center of the second grinding wheel spindle head (101), the workpiece C axis rotation axis of the swivel fixed work holder (200), A numerical controller (CPU) having a memory for storing a machining program in which the pivot axis (200C) is located on the same plane;
A double-headed internal grinding device (1) provided with

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