JP5881446B2 - Gear grinding machine - Google Patents

Description

  The present invention relates to a gear grinder that performs rotational phase alignment between a grindstone and a work gear before the grindstone and the work gear are meshed before grinding the work gear with a grindstone.

  Conventionally, a gear grinder has been provided as one that grinds a heat-treated gear with a grindstone and efficiently finishes the tooth surfaces of the gear. In such a gear grinding machine, the gears are ground by rotating them with the grindstone and the gears engaged with each other. Thereby, in the conventional gear grinding machine, before the grinding wheel and the gear are meshed, the rotational phase of the grinding wheel and the gear is adjusted before grinding.

  In the rotational phase alignment described above, it is necessary to detect the phase in the rotational direction of the gear, but it is common to use a contact type or non-contact type sensor as the workpiece rotational phase detection means. A gear grinding machine that detects the rotational phase of the gear and matches the rotational phase of the grindstone and the gear is disclosed in, for example, Patent Document 1.

JP 2008-110445 A

  However, in the conventional gear grinding machine, when changing the gear to be processed from an external gear to an internal gear, or from an internal gear to an external gear, the sensor is removed and It was necessary to change the mounting position, and time was required for setup.

  Accordingly, the present invention solves the above-described problem, and provides a gear grinding machine capable of shortening the setup time when exchanging a workpiece between a workpiece external gear and a workpiece internal gear. With the goal.

A gear grinding machine according to the first invention for solving the above-mentioned problems is as follows.
Before grinding of the processed outer gear or the internal gear to be machined by grinding, prior to engaging the said grindstone and workpiece external gear or the internal gear to be machined, and the grinding wheel and the workpiece external gear or the internal gear to be machined In the gear grinding machine designed to perform the rotational phase alignment of
A rotary table for rotatably mounting a work external gear and a work internal gear;
Detecting means for detecting the rotational phase of the external gear to be processed and the internal gear to be processed rotated by the rotary table;
A first turning means for turning the detecting means between an external gear detection position capable of detecting the rotational phase of the workpiece external gear and an internal gear detection position capable of detecting the rotational phase of the workpiece internal gear; ,
Second turning means for turning the detection means between the detection position for the external gear and the detection position for the internal gear, and the retraction position retracted from the detection position for the external gear and the detection position for the internal gear; It is characterized by having.

A gear grinding machine according to a second invention for solving the above-mentioned problems is as follows.
The first turning means includes
A shaft portion rotatably supported by the second turning means;
A horizontal portion provided at a lower end of the shaft portion and extending in a horizontal direction;
The horizontal portion extends downward from one end, and has a vertical portion to which the detection means is attached at the lower end.

A gear grinding machine according to a third invention for solving the above-described problems is as follows.
Positioning means provided in the second turning means;
It is provided in the said horizontal part, It is provided with the engaging part engaged with the said positioning means, when the said detection means is arrange | positioned in the said external gear detection position and the said internal gear detection position.

A gear grinding machine according to a fourth invention for solving the above-mentioned problems is as follows.
A drop prevention means for preventing the shaft portion from dropping from the second turning means is provided.

A gear grinding machine according to a fifth invention for solving the above-mentioned problems is as follows.
The detection position for the external gear and the detection position for the internal gear are set along a cutting direction of the grindstone into the external gear to be processed and the internal gear to be processed.

  Therefore, according to the gear grinding machine of the present invention, the first turning means for turning the detection means between the detection position for the external gear and the detection position for the internal gear, and the detection means are the detection position for the external gear and the internal gear. By providing the second turning means for turning between the detection position and the retracted position, it is possible to shorten the setup time when the workpiece is exchanged between the external gear to be processed and the internal gear to be processed. .

It is a principal part enlarged view of the gear grinding machine which concerns on one Example of this invention. It is a front perspective view of a work rotation phase detection device, (a) shows a mode when a sensor is positioned in a detection position, and (b) shows a mode when a sensor is positioned in a retreat position. It is a figure. It is the figure which showed an example of the support structure of a sensor attachment member, Comprising: (a) is a figure which showed a mode when the sensor was positioned in the detection position for external gears, (b) is the detection position for internal gears It is the figure which showed the mode when it was positioned by. It is the figure which showed the other example of the support structure of a sensor attachment member, Comprising: (a) is a figure which showed a mode when the sensor was positioned in the detection position for external gears, (b) is a sensor for internal gears It is the figure which showed the mode when it was positioned in the detection position.

  Hereinafter, a gear grinding machine according to the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, in the gear grinding machine 1, a grindstone head (moving body) 11 is movable in the horizontal X-axis direction (cutting direction), the Y-axis direction, and the vertical Z-axis direction (feeding direction). It is supported. A main shaft 12 is rotatably supported on the grindstone head 11, and a grindstone 13 for external gear grinding or internal gear grinding is detachably attached to the tip of the main shaft 12. A workpiece rotation phase detection device (second turning means) 14 is provided on the concave front surface 11 a at the lower part of the grindstone head 11.

  Further, on the gear grinding machine 1, a rotary table 15 is disposed so as to face the grindstone head 11 in the X-axis direction and is rotatably supported. On the upper surface of the turntable 15, a workpiece W, which is a workpiece gear (a workpiece outer gear or a workpiece inner gear), is detachably mounted.

  That is, the workpiece rotation phase detection device 14 is disposed on the opposite side of the workpiece W with respect to the mounted grindstone 13 in the X-axis direction, and is disposed below the mounted grindstone 13 in the Z-axis direction. ing.

  Next, the configuration of the workpiece rotation phase detection device 14 will be described in detail with reference to FIGS.

  As shown in FIGS. 2A and 2B, the workpiece rotation phase detection device 14 has a substrate 21, and this substrate 21 is attached to the front surface 11 a of the grindstone head 11. A cylinder support member 22, a guide member 23, an arm support member 24, and a stopper 25 are provided on the front side of the substrate 21.

  The cylinder 26 is supported by the cylinder support member 22 so as to be in a horizontal state, and when the cylinder 26 is driven, the piston rod 26a is contracted. And the guide member 23 is arrange | positioned under the moving range to which the front-end | tip part 26b of piston rod 26a reciprocates. An arm support member 24 is provided on the front surface of the guide member 23, and a stopper 25 is provided on a side surface of the guide member 23.

  In addition, the base end portion 27a of the swivel arm 27 is rotatably supported by the pin 28 at the distal end portion 26b of the piston rod 26a. At this time, the base end portion 27 a of the turning arm 27 is in contact with the upper surface serving as the guide surface of the guide member 23. The turning arm 27 extends so that a middle portion in the longitudinal direction is bent, and the bent portion 27 b that is bent is rotatably supported by the arm support member 24 by a pin 29. The cylinder 26, the turning arm 27, and the like constitute second turning means.

  Further, a mounting hole 27d is formed in the distal end portion 27c of the turning arm 27 (see FIGS. 3A and 3B), and a sensor mounting member (first turning means) 40 is provided in the mounting hole 27d. Is rotatably supported. A sensor (detection means) 61 is attached to the lower end portion of the sensor attachment member 40. The sensor 61 is a non-contact sensor such as a proximity sensor, and detects the positions of teeth (mountains and valleys) of the workpiece W and the positions of both left and right tooth surfaces, and the rotation of the workpiece W based on the detection results. The phase is obtained.

  Accordingly, as shown in FIG. 2 (a), the piston rod 26a of the cylinder 26 is extended and the base end portion 27a of the turning arm 27 is pressed, whereby the distal end portion 27c of the turning arm 27 is bent. Can be turned to the workpiece W side. Thereby, the sensor 61 can be moved to the detection position (external gear detection position and internal gear detection position) P1 for detecting the rotational phase of the workpiece W.

  When the base end portion 27a of the swing arm 27 is pressed, the base end portion 27a slides smoothly along the upper surface of the guide member 23, so that the swing arm 27 can smoothly turn to the workpiece W side. It can be carried out. Since the pressed base end portion 27a finally comes into contact with the side surface of the stopper 25 and is positioned at the contacted position, the detection position P1 when the sensor 61 is turned is always set to the same position. Can be set.

  Further, as shown in FIG. 2B, the piston rod 26a of the cylinder 26 is shortened and the base end portion 27a of the swivel arm 27 is pulled back, so that the distal end portion 27c of the swivel arm 25 is bent to the bent portion 27b. As a center, it can be swung to the grindstone head 11 side. Thereby, the sensor 61 can be moved to the retracted position P2 retracted from the detection position P1.

  When the base end portion 27a of the turning arm 27 is pulled back, the base end portion 27a slides smoothly along the upper surface of the guide member 23, so that the turning arm 27 smoothly turns to the grindstone head 11 side. It can be carried out. The revolving arm 27 that revolves toward the grindstone head 11 finally comes into contact with the front surface of the stopper 25 and is positioned at the abutted position. Therefore, the retreat position P2 when the sensor 61 revolves is always set. The same position can be set.

  As shown in FIGS. 3A and 3B, the sensor mounting member 40 includes a hollow shaft portion 41, a horizontal portion 42, and a vertical portion 43.

  The hollow shaft portion 41 is formed in a cylindrical shape and is supported in the mounting hole 27b via the bush 51 so as to be rotatable around the Z axis. A nut (drop-off prevention means) 52 is fitted into the upper outer peripheral portion of the hollow shaft portion 41. Thus, by fitting the nut 52 into the hollow shaft portion 41, the hollow shaft portion 41 is dropped off. In other words, the sensor mounting member 40 is prevented from falling off.

  Further, the horizontal portion 42 is formed in a plate shape extending in the horizontal direction, and is integrally formed at the lower end of the hollow shaft portion 41, and the upper surface thereof is rotated with the rotation of the hollow shaft portion 41. The swivel arm 27 is configured to rotate while being in contact with the lower surface of the distal end portion 27c. An external gear positioning hole (external gear engaging portion) 42 a and an internal gear positioning hole (internal gear engaging portion) 42 b sandwich the hollow shaft portion 41 on the upper surface of the horizontal portion 42. The outer gear positioning hole 42 a and the inner gear positioning hole 42 b are engageable with a plunger (positioning means) 53 embedded in the turning arm 27.

  Further, the vertical portion 43 is formed in a plate shape extending in the vertical direction, and is integrally formed at one end of the horizontal portion 42. The sensor 61 arranged in a horizontal state is attached to the lower end of the vertical portion 43, and a sensor cable 62 is connected to the base end portion of the sensor 61. The sensor cable 62 is wired from the base end portion of the sensor 61 through the hollow shaft portion 41 and then along the upper surface of the swivel arm 27, and finally connected to an NC device (not shown). ing.

  Therefore, by rotating the sensor mounting member 40, the sensor 61 can be turned around the Z axis. At this time, by engaging the plunger 53 with the external gear positioning hole 42a, the sensor 16 can be positioned at the detection position P1 for the external gear. On the other hand, by engaging the plunger 53 with the internal gear positioning hole 42b, the sensor 61 can be positioned at the detection position P1 for the internal gear.

That is, the detection position P1 for the external gear and the internal gear is set along the cutting direction of the grindstone 13 into the workpiece W. Then, a sensor 61 positioned at the detection position P1 for the external gear, a sensor 61 positioned at the detection position P1 for the internal gear, Oite the notch way direction of the grindstone 13, a 180 ° reversed state ing.

  Next, the case of grinding the workpiece W of the internal gear (hereinafter referred to as Wb) after grinding the workpiece W of the external gear (hereinafter referred to as Wa) using the gear grinding machine 1 will be described.

  First, after the grindstone 13 and the workpiece Wa are rotated synchronously, the grindstone head 11 is moved, and as shown in FIG. 2A, the swivel arm 27 is swung, and the sensor 61 is detected from the retracted position P2. Position to P1.

  Next, as shown in FIG. 3A, the sensor mounting member 40 is turned to position the sensor 61 at the detection position P1 for the external gear on the outer side in the radial direction of the work Wa. The rotational phase of Wa is detected.

  And based on the rotational phase of the workpiece | work Wa detected by the sensor 61, the rotational phase of at least one of the grindstone 13 and the workpiece | work Wa is correct | amended, and those rotational phases are united.

  Next, as shown in FIG. 2B, the turning arm 27 is turned to retract the sensor 61 from the detection position P1 to the retracted position P2.

  Then, by moving the grindstone head 11, the grindstone 13 and the workpiece Wa are engaged with each other, and the workpiece Wa is ground. Thereafter, after the grinding of the workpiece Wa is completed, an exchange operation from the workpiece Wa to the workpiece Wb is performed.

  Next, in order to continue grinding of the workpiece Wb, the grindstone 13 and the workpiece Wb are rotated synchronously, and then the grindstone head 11 is moved and the swivel arm 27 is swung as shown in FIG. Thus, the sensor 61 is positioned from the retracted position P2 to the detection position P1.

  Then, as shown in FIG. 3B, the sensor mounting member 40 is turned to position the sensor 61 at the detection position P1 for the internal gear on the radially inner side of the workpiece Wb. The rotational phase of Wb is detected.

  Next, based on the rotational phase of the workpiece Wb detected by the sensor 61, the rotational phase of at least one of the grindstone 13 and the workpiece Wb is corrected, and their rotational phases are matched.

  Then, as shown in FIG. 2B, while the grindstone head 11 is moved, the turning arm 27 is turned to retract the sensor 61 from the detection position P1 to the retracted position P2.

  Next, by moving the grindstone head 11, the grindstone 13 and the workpiece Wb are engaged with each other to grind the workpiece Wb.

  In the above-described embodiment, the sensor mounting member 40 is pivotally supported by the swing arm 27 via the bush 51. However, as shown in FIGS. You may make it support to the turning arm 27 via the bearing 54 so that turning is possible. In addition, the description of the case where the workpiece Wa is ground after the workpiece Wb is ground is omitted because it can be fully understood from the above description.

  Therefore, according to the gear grinding machine 1 of the present invention, the sensor mounting member 40 for turning the sensor 61 between the detection position P1 for the external gear and the detection position P1 for the internal gear can be turned to the turning arm 27. Therefore, the setup time when exchanging the workpiece between the workpiece Wa and the workpiece Wb can be shortened.

  The present invention can be applied to a gear grinding machine capable of reducing the size and weight of a machine when both the external gear to be processed and the internal gear to be processed can be ground.

DESCRIPTION OF SYMBOLS 1 Gear grinding machine 11 Grinding wheel head 11a Front surface 12 Spindle 13 Grinding wheel 14 Work rotation phase detector 15 Rotary table 21 Substrate 22 Cylinder support member 23 Guide member 24 Arm support member 25 Stopper 26 Cylinder 26a Piston rod 26b Tip part 27 Turning arm 27a Base End portion 27b Bent portion 27c End portion 27d Mounting hole 28, 29 Pin 40 Sensor mounting member 41 Hollow shaft portion 42 Horizontal portion 42a External gear positioning hole 42b Internal gear positioning hole 43 Vertical portion 51 Bushing 52 Nut 53 Plunger 54 Bearing 61 Sensor 62 Sensor cable

Claims (5)

Before grinding of the processed outer gear or the internal gear to be machined by grinding, prior to engaging the said grindstone and workpiece external gear or the internal gear to be machined, and the grinding wheel and the workpiece external gear or the internal gear to be machined In the gear grinding machine designed to perform the rotational phase alignment of
A rotary table for rotatably mounting a work external gear and a work internal gear;
Detecting means for detecting the rotational phase of the external gear to be processed and the internal gear to be processed rotated by the rotary table;
A first turning means for turning the detecting means between an external gear detection position capable of detecting the rotational phase of the workpiece external gear and an internal gear detection position capable of detecting the rotational phase of the workpiece internal gear; ,
Second turning means for turning the detection means between the detection position for the external gear and the detection position for the internal gear, and the retraction position retracted from the detection position for the external gear and the detection position for the internal gear; A gear grinder characterized by comprising. In the gear grinding machine according to claim 1,
The first turning means includes
A shaft portion rotatably supported by the second turning means;
A horizontal portion provided at a lower end of the shaft portion and extending in a horizontal direction;
A gear grinding machine, comprising: a vertical portion extending downward from one end of the horizontal portion and having the detection means attached to the lower end thereof. In the gear grinding machine according to claim 1 or 2,
Positioning means provided in the second turning means;
A gear provided on the horizontal portion and engaging with the positioning means when the detection means is disposed at the detection position for the external gear and the detection position for the internal gear. Grinder. In the gear grinding machine according to claim 2 or 3,
A gear grinding machine, comprising: a drop prevention means for preventing the shaft portion from dropping from the second turning means. In the gear grinding machine according to any one of claims 1 to 4,
The external gear detection position and the internal gear detection position are set along a cutting direction of the grindstone into the external gear and internal gear to be processed.

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