JP2009142926A - Teeth positioning method for gear shaving machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a teeth positioning method for a gear shaving machine capable of easily positioning teeth of a shaving cutter and a workpiece gear in a short period of time. <P>SOLUTION: When the workpiece gear W arranged to separate from the shaving cutter 12 is moved toward the shaving cutter 12 by a servomotor 30, moving speed of the workpiece gear W is decreased by controlling the servomotor 30 in the middle of movement of the workpiece gear W, and then, positioning teeth between the shaving cutter 12 and the workpiece gear W is carried out in this state. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a gearing method for a gear processing machine that performs gearing so that a gear-type tool and a gear to be machined can mesh with each other.

  2. Description of the Related Art Conventionally, gear machining machines such as a gear shaving machine have been provided for machining a gear to be machined with a gear-type tool. In such a gear processing machine, gear processing is performed by engaging a gear-type tool and a gear to be processed (see, for example, Patent Document 1).

  As the above-described gear machining machine, for example, the gear to be machined arranged at the exchange position of the gear to be machined is advanced toward the machining position of the gear to be machined by the gear type tool. Tooth alignment is performed while contacting the gear to be processed in a tangential direction, and the tooth tip (crest) and tooth groove (valley) of the gear-type tool, and the tooth groove (valley) and tooth tip (crest) of the gear to be processed There is something that bites. In such a gear processing machine, it is conceivable that the gear to be processed is moved between the exchange position and the processing position by a hydraulic cylinder.

JP 2003-1524 A

  In the above-described gear processing machine, it is desired to reduce the time for gearing between the gear-type tool and the gear to be processed. For example, it is conceivable to increase the moving speed of the machined gear by controlling the supply and discharge of hydraulic pressure to the hydraulic cylinder. However, if the moving speed of the machined gear is increased too much, the gear-type tool will hit the tooth surface of the machined gear. The part may be damaged. On the other hand, it is conceivable to reduce the moving speed of the gear to be processed only when the gear type tool and the gear to be processed mesh, but the gear to be processed is moved by a hydraulic cylinder, and switching and adjustment of the speed are easy. Could not be done.

  Therefore, the present invention has been proposed in view of the above-described problems, and an object of the present invention is to provide a gear aligning method for a gear processing machine capable of easily aligning a gear-type tool and a gear to be processed in a short time.

  A gear aligning method for a gear processing machine according to a first invention that solves the above-described problem is a gear aligning method for a gear processing machine that performs gear alignment so that the gear tool and the gear to be processed can mesh with each other. A work gear arranged away from the gear tool is moved toward the gear tool by a servo motor, and the servo motor is controlled while the work gear is moving to move the work gear. In this state, the gear speed is reduced, and the moving speed of the gear to be processed is decreased, and the gear-type tool and the gear to be processed are aligned.

  A gear processing method for a gear processing machine according to a second invention for solving the above-described problem is a gear processing method for a gear processing machine according to the first invention, wherein a point where the moving speed of the gear to be processed is lowered is The gear-type tool and the gear to be machined are just before gearing.

  According to the gearing method of the gear processing machine according to the first aspect of the invention, there is provided a gearing machine gearing method for performing gearing so that the gear tool and the gear to be machined can mesh with each other. The workpiece gears that are spaced apart are moved toward the gear-type tool by a servo motor, the servo motor is controlled during the movement of the workpiece gear, and the moving speed of the workpiece gear is reduced, In this state, the gear-type tool and the gear to be machined are engaged so that the gear to be machined moves from a position away from the gear-type tool to a point where the moving speed of the gear to be machined is reduced. The time required can be shortened. Furthermore, from the position away from the gear-type tool to the point where the movement speed of the work gear is reduced with respect to the movement speed of the work gear when the gear-type tool and the work gear are aligned. The moving speed of the gear to be processed can be greatly increased. As a result, it is possible to shorten the time required for the gear-type tool and the gear to be machined to mesh. It is easy to control the servo motor to lower the moving speed of the gear to be processed. Since the moving speed of the gear to be processed is lowered before the gear-type tool and the gear to be processed are geared, the gear-type tool may damage the gear to be processed at the time of the gear alignment. The possibility can be reduced.

  According to the gearing method of the gear machining machine according to the second invention, the point where the moving speed of the gear to be machined is lowered immediately before the gearing of the gear tool and the gear to be machined. In addition to the same effects as the gear alignment method of the gear machining machine according to the first aspect of the invention, the time required for movement of the gear to be machined can be further shortened, and the teeth of the gear tool and the gear to be machined can be reduced. Matching time can be shortened more reliably.

  The best mode of the gear aligning method of the gear machining machine according to the present invention will be specifically described with reference to the drawings.

[First embodiment]
1 to 3 are used to explain the first embodiment when the gearing method of the gear machining machine according to the present invention is applied to the gear-type tool (shaving cutter) of the gear shaving machine and the gear to be machined. To do.
FIG. 1 is a front view of a gear processing machine, FIG. 2 is a plan view of a gear aligning device included in the gear processing machine, and FIG. 3 is a side view thereof.

  As shown in FIG. 1, the gear shaving machine 50 according to the present embodiment finely cuts the tooth surface of a work gear (work gear) W processed into a gear shape by a gear cutting machine such as a hobbing machine. A shaving cutter 12, which is a gear-type tool to be processed, is rotatably attached to the column 11. The shaving cutter 12 is provided on the column 11 so as to be movable up and down. The column 11 is provided with a gearing device 20 that faces the shaving cutter 12 and rotatably supports the work gear W mounted on the magazine 13.

  The tooth alignment device 20 includes a revolving plate (support arm) 21 and support members 22 and 22 that are provided near both ends of the support arm 21 and support the magazine 13. That is, the support arm 21 can support the two work gears W. The support arm 21 is fixed to a shaft body 24 of a rotary actuator 23 that rotationally drives the support arm 21.

  That is, when the shaft body 24 of the rotary actuator 23 rotates, the support arm 21 pivots in response to the rotation. Therefore, the left support tool 22 in FIG. 1 and the right support tool 22 in FIG. Can do. As a result, when the work gear W supported by one support tool 22 is processed by the shaving cutter 12, the work gear W can be supported by the other support tool 22 and supported by the one support tool 22. Immediately after the machining of the workpiece gear thus completed, the arrangement of the support members 22 can be replaced immediately and an unmachined workpiece gear can be machined.

  The rotary actuator 23 is fixed to the sliding plate 25. A sliding member 26 is fixed to the sliding plate 25. A screw portion 27 such as a ball screw is formed on the inner peripheral surface of the sliding member 26.

  A fixing plate 28 is fixed at a position facing the shaving cutter 12 in the column 11 described above. A servo motor 30 is fixed to the fixed plate 28 via a rack 29. A shaft 32 is connected to the tip of the drive unit 31 of the servo motor 30. The shaft body 32 extends through the sliding member 26 described above. A screw portion 33 is formed on the peripheral surface of the shaft body 32, and the screw portion 33 is engaged with the screw portion 27 of the sliding member 26.

  As shown in FIGS. 2 and 3, guide rails 34 and 35 extending in parallel with the shaft body 32 are fixed to both sides of the fixed plate 28, respectively. The guide rails 34 and 35 are respectively provided with guide members 36 and 37 which are movable on the guide rails 34 and 35 and fixed to the sliding plate 25 described above.

  Therefore, when the drive unit 31 of the servo motor 30 rotates, the shaft body 32 also rotates according to this rotation. The sliding member 26 slides and moves along the shaft body 32. Along with this, the sliding plate 25, the drive motor 23, the support arm 21 and the support tools 22, 22 move along the shaft body 32 and the guide rails 34, 35.

  Bearings 38 and 39 are respectively arranged between the drive unit 31 and the shaft body 32 and the rack 29, and the drive unit 31 and the shaft body 32 are supported by the rack 29 through the bearings 38 and 39. . Further, the position of the sliding member 26 in the shaft body 32 can be detected. Based on the detected position of the sliding member 26, the positions of the support members 22 and 22 attached to the support arm can be calculated. Therefore, the support arm 21 can be accurately controlled by the servo motor 30 and the rotary actuator 23.

  Next, the tooth alignment operation and processing in the gear shaving machine 50 will be described. Hereinafter, the end portion of the support arm 21 in the vicinity of the shaving cutter 12 is referred to as a forward rotation end, and the end portion of the support arm 21 that faces the end portion of the support arm 21 in the vicinity of the shaving cutter 12 (the forward rotation end) is referred to as a reverse rotation end. .

  First, the servo motor 30 is controlled to move the support arm 21 of the tooth alignment apparatus 20 in a direction away from the shaving cutter 12, that is, the workpiece is moved backward and moved to the reverse position (in FIG. 1). Place it in the imaginary line).

  Subsequently, the rotary actuator 23 is controlled so that the support arm 21 is reversed 180 degrees to the left and right, and the support 22 disposed on the forward rotation end side of the support arm 21 is disposed on the reverse rotation end of the support arm 21. The support tool 22 arranged on the reverse rotation end side of 21 is arranged on the normal rotation end side of the support arm 21, that is, on the workpiece replacement position.

  Subsequently, the servo motor 30 is controlled to advance the support arm 21 toward the shaving cutter 12 at a first predetermined speed, and immediately before the work gear W supported by the support arm 21 and the shaving cutter 12 come into contact with each other. At the deceleration position (P), the servo motor 30 is controlled to advance the support arm 21 toward the shaving cutter 12 at a second predetermined speed that is slower than the first predetermined speed, so that shaving becomes the forward end. It arrange | positions in the process position of the workpiece | work gearwheel W by the cutter 12 (location shown as the continuous line in FIG. 1). However, during the advancing of the support arm 21 toward the shaving cutter 12 at the second predetermined speed, the toothing is performed while the shaving cutter 12 and the work gear W are in contact with each other in the tangential direction. The tooth tip (crest) and the tooth groove (valley) are engaged with the tooth groove (valley) and the tooth tip (crest) of the work gear W. The teeth of the work gear W can escape when the shaving cutter 12 and the teeth of the work gear W come into contact with each other, and the tooth surface of the work gear W by the shaving cutter 12 is not damaged. Yes.

Here, with reference to FIG. 4, the processing cycle in the case where the servo arm 30 performs the back and forth movement of the support arm 21 of the gearing device 20 included in the shaving machine 50 described above, and the hydraulic cylinder instead of the servo motor 30 is used. Compare the machining cycle.
FIG. 4 is a diagram showing a machining cycle. FIG. 4A shows a machining cycle in the case of using a hydraulic cylinder, and FIG. 4B shows a machining cycle in the case of using a servo motor.

  In the case of using a hydraulic cylinder, as shown in FIG. 4 (a), when machining of the work gear is completed, the hydraulic pressure is supplied to and discharged from the hydraulic cylinder at a predetermined rate, and the support arm disposed at the forward end is Move backward to the reverse end. Subsequently, the support arm is inverted 180 degrees. Then, the hydraulic pressure is supplied to and discharged from the hydraulic cylinder at a predetermined rate, and the support arm is moved toward the forward end. In the middle of advancing the support arm, the work gear supported by the support arm and the gear-type tool are engaged and meshed. In order to advance the support arm and mesh the work gear with the gear-type tool, the speed when the support arm is advanced is set slower than the speed when the support arm is moved backward. Moreover, since the hydraulic cylinder is used, the moving speed of the support arm is constant.

  On the other hand, in the case of using a servo motor, as shown in FIG. 4B, when the machining of the work gear is completed, the servo motor is controlled to move the support arm arranged at the forward end to the reverse end. Moving. Subsequently, the support arm is inverted 180 degrees. Then, the servo motor is controlled to move the support arm toward the forward end. However, the speed at which the support arm is advanced at this time is changed. Specifically, the gear type tool and the work gear are decelerated to a second predetermined speed immediately before the gear type tool and the work gear supported by the support arm come into contact with each other. The teeth are matched and meshed. In other words, the advancement speed of the support arm can be easily adjusted, and the tooth matching time can be shortened by making the speed variable.

  Therefore, when the support arm is moved forward and backward with a servo motor, the gear toothing time between the gear-type tool and the work gear can be shortened compared to when the support arm is moved forward and backward with a hydraulic cylinder. The production efficiency of W can be improved.

  In the tooth alignment method using the gear shaving machine 50, the work gear W arranged away from the shaving cutter 12 is moved toward the shaving cutter 12 by the servo motor 30, and the servo motor 30 is moved during the movement of the work gear W. The point at which the moving speed of the work gear W is lowered from the position separated from the shaving cutter 12 by controlling the lowering of the moving speed of the work gear W and adjusting the teeth of the shaving cutter 12 and the work gear W in this state. The time required for the movement of the work gear W can be shortened. Further, the work gear W is moved from a position away from the shaving cutter 12 to a point where the movement speed of the work gear W is lowered with respect to the movement speed of the work gear W when the shaving cutter 12 and the work gear W are engaged. The moving speed can be greatly increased. As a result, it is possible to shorten the time required for the toothing of the shaving cutter 12 and the work gear W. It is easy to control the servo motor to lower the moving speed of the work gear W itself. Since the moving speed of the work gear W is lowered before the toothing between the shaving cutter 12 and the work gear W is performed, the possibility that the shaving cutter 12 may damage the work gear W during the toothing can be reduced. .

  Further, since the point where the movement speed of the work gear W is lowered is immediately before the toothing of the shaving cutter 12 and the work gear W is performed, the time required for the movement of the work gear W can be further shortened, and shaving. The time for aligning the cutter 12 and the work gear W can be shortened more reliably.

  Further, since the movement of the work gear W is performed, the control of the servo motor 30 is easy and the moving speed of the work gear W when the shaving cutter 12 and the work gear W are engaged with each other is adjusted. On the other hand, the moving speed of the work gear W from the position separated from the shaving cutter 12 to the point where the moving speed of the work gear W is lowered can be significantly increased, and the time required for the toothing of the shaving cutter 12 and the work gear W can be increased. Further shortening is possible.

  In the above description, the description has been given using the tooth alignment apparatus 20 that includes the two support tools 22 and 22 and has the support arm 21 that can support the two work gears W, but includes one support tool and one work piece. It is also possible to set it as the gear alignment apparatus which has a support arm which can support a gearwheel. Even such a tooth-matching device has the same effects as the tooth-matching device 20 described above.

  Further, at the deceleration position (P) immediately before the workpiece gear W and the shaving cutter 12 come into contact, the servo motor 30 is controlled to shave the support arm 21 at a second predetermined speed that is slower than the first predetermined speed. Although the description has been given using the gear shaving machine 50 that is moved forward toward the cutter 12, the movement speed of the support arm is controlled by controlling the servo motor between the workpiece replacement position and the deceleration position (P). It is also possible to make a gear shaving machine that lowers the speed or switches its moving speed a plurality of times. Even such a gear shaving machine has the same effects as the gear shaving machine 50 described above.

1 is a front view of a first embodiment of a gear processing machine according to the present invention. It is a top view of a tooth alignment apparatus. It is a side view of a tooth alignment apparatus. It is a figure which shows the processing cycle of a gear processing machine.

Explanation of symbols

11 Column 12 Shaving cutter 13 Magazine 20 Alignment device 21 Swivel plate (support arm)
22 Support tool 23 Rotary actuator 24 Shaft body 25 Sliding plate 26 Sliding member 27 Screw portion 28 Fixing plate 29 Rack 30 Servo motor 31 Drive portion 32 Shaft body 33 Screw portion 34, 35 Guide rail 36, 37 Guide members 38, 39 Bearing 50 Shaving machine W Workpiece

Claims (2)

A gear processing method of a gear processing machine for performing gear alignment so that the gear tool and the gear to be processed can mesh with each other,
A gear to be machined arranged away from the gear-type tool is moved toward the gear-type tool by a servo motor, and the servo motor is controlled during the movement of the gear to be machined. A gearing method for a gear machining machine, wherein the gearing tool and the gear to be machined are meshed in this state by lowering the moving speed. A gear alignment method for a gear processing machine according to claim 1,
The gear machining method for a gear machining machine, wherein the point at which the movement speed of the gear to be machined is lowered is just before the gear type tool and the gear to be machined are meshed.

Images