JPS63216623A - Rapid return during service interruption for gear processing machine - Google Patents

Abstract

PURPOSE:To prevent damage of a tool, by a method wherein the drive source of a feed device is provided with a drive source during energizing and a drive source during service interruption, and simultaneously with service interruption, a distance between axes of the tool and a gear material is rapidly traversed, enlarged, and displaced by means of the drive source during service interruption. CONSTITUTION:A distance between the axes of a drive shaft 2 of a tool 1 and a machining gear shaft 4 of a gear material 3 to be machined is linearly displaced by a feed device 5 so that fine feed can be shifted. During energization, the gear shaft 4 is moved forward and backward by a hydraulic cylinder 8 through switching of a solenoid valve 13. During backward movement, the cylinder is moved backward only in a rapid traverse manner by a control device 20. During service interruption, the line of the solenoid valve 13 is closed, a solenoid valve 14 is brought into a state, shown, through the force of a spring, and by means of an oil pressure accumulated in an accumulator 7, an inter-axis distance is rapidly traversed and enlarged. Thus, though the normal set numbers of revolutions of the tool 1 and the gear material 3 are disturbed due to service interruption, cutting of the tool 1 through the gear material 3 is prevented from occurring, and a tool and the like is prevented from damage.

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a gear processing machine belonging to a machine tool, and the distance between the axes of a tool (1) and a gear material (3) is rapidly enlarged and retreated during a power outage. The purpose is to

"Prior Art" Documents include Published Patent Publication No. 177816/1983. This relates to an emergency stop during power supply, and is completely different from the purpose of the present invention.

At the time of power supply, it was possible to release the meshing state between the tool and the gear by using the means described in the above-mentioned document, thereby preventing damage to the tool. However, if a power outage occurs while the tool and gear are engaged during machining, the drive source for emergency return will be cut off, and the normal set rotation speed of the tool and gear will be disrupted, causing the tool to bite into the gear and requiring expensive tools. It was often damaged.

``Means for solving problems'' The present invention takes the following measures to solve the above problems.

(a) A tool drive shaft (2) that drives the tool (1) and a machining gear shaft (4) that drives the gear material to be machined (3) are arranged.

(b) Install a feed device (5) that linearly shifts the distance between the tool drive shaft (2) and the machining gear shaft (4).

(+) (c) The feed device (5) is associated with a control device that controls the feed speed so that it can be switched between rapid feed and minute feed.

(d) At a machining position where the tool (1) and the gear material (3) are in predetermined engagement, the control device is set so that the tool (1) and the gear material (3) can be switched in advance to perform fast forwarding in a direction that increases the relative distance between them.

(E) As a drive source for driving the feeding device (5), a drive source (6) for when the power is on and a drive source (7) for the time of power outage are provided.

(f) In the event of a power outage, at the same time as the power outage, the drive source (7
) supplies power so that the distance between the axes of the tool (1) and gear material (3) is rapidly enlarged.

[Example" As an example, its configuration will be explained according to the drawings.

Example of Figure 1.

(B) Tool drive shaft ((I5) 2) that drives the tool (1) and machining gear shaft (4) that drives the workpiece gear material (3)
).

(b) Install a feed device (5) that linearly shifts the distance between the tool drive shaft (2) and the machining gear shaft (4).

(c) The feed device (5) is associated with a control device that controls the feed speed so as to be switchable between rapid feed and minute feed.

(d) At a machining position where the tool (1) and the gear material (3) are in predetermined engagement, the control device is set so that the tool (1) and the gear material (3) can be switched in advance to perform fast forwarding in a direction that increases the relative distance between them.

(E) As a drive source for driving the feeding device (5), a drive source (6) for when the power is on and a drive source (7) for the time of power outage are provided.

(f) In the event of a power outage, at the same time as the power outage, the drive source (7
) supplies power so that the distance between the axes of the tool (1) and gear material (3) is rapidly enlarged.

(g) A hydraulic cylinder (8) is used as the feeding device (5). Hydraulic pressure from the hydraulic pump unit is used as the drive source 6 when energized, and the hydraulic cylinder (8
). In the event of a power outage, the solenoid valve 14 is switched when the power is turned on, and the check valve 15 is used to close the accumulator 7 (9).
) uses the hydraulic pressure accumulated in the

In the example shown in Fig. 2, the feed screw (1) is used as the feed device (5).
0) is driven by an electric motor (11), in the event of a power outage, the electric motor (11) is
1) Drive.

In the example shown in Fig. 3, the feed screw (1) is used as the feed device (5).
0) is driven by an electric motor (11). Furthermore, another drive device 12 consisting of a hydraulic cylinder 17, a rack 18, and an electromagnetic clutch 16 is provided. Note that a hydraulic motor may be used instead of the hydraulic cylinder 17 and rack 18.

In the example shown in Fig. 4, the feed screw (1) is used as the feed device (5).
0) is driven by an electric motor (11), a drive device (12) separate from this electric motor (11) is provided, and in the event of a power outage, the feed screw (10) is driven by another drive device (12).
to drive. In this example, another electric motor is used as 12. 16 is an electromagnetic clutch (not essential).

In the example shown in FIG. 5, a drive motor 12 (electric or hydraulic) separate from the drive motor 11 when energized is provided, and an electromagnetic clutch 16 and a flywheel 19 are further provided.

"Operations and Effects of the Invention" In FIG. 1, when electricity is applied, the solenoid valve 13 is switched and the gear shaft (tool shaft) is moved forward and backward by the hydraulic cylinder 8. The control device 20 controls the feeding device i! Switch the speed of 5,
Only rapid feed is performed in the direction of increasing the distance between the axes of the tool 1 and the gear material 3. Small feeds can also be made in the opposite direction. During a power outage, the solenoid valve 13 closes the pipeline as shown in the figure, and the solenoid valve 14 closes the pipe as shown in the figure.
is brought into the state shown in the figure by the spring. Therefore, the hydraulic pressure accumulated in the accumulator 7 (9) causes the tool 1 and the gear material 3 to be rapidly moved in the direction of increasing the distance between their axes. As a result of the above actions, if a power outage occurs while the tool and gear are engaged during machining, the drive source for emergency return is cut off, and even if the normal set rotation speed of the tool and gear material is disturbed, the tool will not bite into the gear material. It is now possible to prevent damage to expensive tools and machinery without having to worry about it.

In Fig. 2, the feed screw (1) is used as the feed device (5).
0) is driven by an electric motor (1]), in the event of a power outage, the electric motor (1) is powered by a power generator or battery.
1) Drive. Tool 1 and gear material 3 are controlled by the control circuit.
drive in the direction of increasing the distance between the axes. As a result of the above actions, if a power outage occurs while the tool and gear are engaged during machining, the drive source for emergency return is cut off, and even if the normal set rotation speed of the tool and gear material is disturbed, the tool will not bite into the gear material. It is now possible to prevent damage to expensive tools and machinery without having to worry about it.

In FIG. 3, the drive motor 11 is separated by an electromagnetic clutch 16 so that the rotation of the drive motor 11 is not transmitted to another drive device 12 when the power is on. In the same manner as shown in Fig. 1, the clutch is connected during a power outage, and when the current is turned on, the solenoid valve 14 is switched, the check valve 15 is used, and the hydraulic pressure accumulated in the accumulator 7 (9) is used to operate the cylinder 17 and the rack/binion 18. The distance between the axes of the tool 1 and the gear material 3 is fast-forwarded and retracted. In addition, the cylinder 17 and rack/binion 18
A hydraulic motor may be used instead.

Although the electromagnetic clutch 16 does not need to be used (in this case, the hydraulic motor is idle), if it is used, the following advantages can be obtained by leaving the clutch free. It is also possible to constantly apply oil pressure to the hydraulic motor and keep it on standby so that it can immediately move on to the next operation, or to keep the motor constantly rotating and keep it on standby so that it can immediately move on to the next operation.

Note that measures must be taken to prevent the brake from acting on the motor 11 during a power outage. In the case of an NC machine, the feed speed of the feed device 5 is set by a program.

In the example shown in Fig. 4, the feed screw (1) is used as the feed device (5).
0) is driven by an electric motor (11), a drive device (12) separate from this electric motor (11) is provided, and in the event of a power outage, the feed screw (10) is driven by another drive device (12).
to drive. In this example, another electric motor is used as 12. 16 is an electromagnetic clutch (not essential).

The driving source for this motor is a power generator or a battery. If a hydraulic motor is used as 12, the result will be similar to the example shown in FIG.

In the example shown in FIG. 5, a drive motor 12 (electric or hydraulic) separate from the drive motor 11 when energized is provided, and an electromagnetic clutch 16 and a flywheel 19 are further provided. When energized, the clutch 16 is released, the motor 12 is rotated, and the flywheel is also rotated at the same time. At the time of power outage, the electromagnetic clutch 16 is engaged, the rotational force of the flywheel 19 drives the feed screw (10), and the distance between the axes of the tool 1 and the gear material 3 is rapidly moved and retracted. Due to the above actions, processing is in progress.

If a power outage occurs while the tool and gear are engaged, the drive source for emergency return is cut off, and even if the normal set rotation speed of the tool and gear material is disturbed, the tool will not bite into the gear material, and the expensive tool and gear material will be saved. Machine damage can now be prevented.

Other power outage countermeasures are listed below.

(1) Loosen the gear chuck.

(2) Release the tool restraint.

(3) Combination of the above (4) Combination of the method of the present invention and the method of the present invention in which the distance between the axes of the tool 1 and the gear material 3 is rapidly traversed and retracted The method of (1) and (2) above is to free the tool so that it can escape. This is to prevent damage to tools and machinery.

As explained above, according to the present invention, in the event of a power outage while the tool and gear are engaged during machining, the drive source for emergency return is cut off, and even if the normal set rotation speed of the tool and gear material is disturbed, the tool This prevents the metal from biting into the gear material, preventing damage to expensive tools and machinery. Although the drawing shows a hobbing machine, it can be similarly applied to other gear processing machines.

[Brief explanation of the drawing]

FIG. 1 shows an example of the structure of the hobbing machine of the present invention and a hydraulic circuit diagram of the feed device. FIG. 2 shows an example of another structure of the hobbing machine of the present invention. FIG. 3 shows another example of the structure of a hobbing machine according to the present invention and a hydraulic circuit diagram of a feeding device. 4 and 5 show examples of other structures of the hobbing machine of the present invention. 1: Tool 2: Tool shaft 3: Gear 4: Gear shaft 5: Feeding device 6: Drive device when energized 7 (9): Accumulator 8: Hydraulic cylinder 1°: Feed screw 11: Motor 12: Another drive device 16 :Clutch 18Niratsu & pinion (hydraulic motor) 19:Flywheel patent applicant Kashifuji Iron Works Co., Ltd. Procedural amendment (method) June 23, 1988 No. 64 No. 2, Title of invention During power outage of gear processing machine Rapid return device 3 - Person making the amendment Patent applicant May 26, 1988 [1 5, Subject of amendment ``Application'' [Brief explanation column of drawings in the specification] ``Drawings'' 6. Contents of amendment i. ``Application'' ``As attached.'' ``Brief explanation of drawings in the specification'' ``As attached.'' C. ``Drawings'' ``As attached.'' 4. Brief explanation of the drawings Figure 1 shows the invention An example of a front view of a hobbing machine and a hydraulic circuit diagram of a feed device is shown. FIG. 2 shows another front view example of the hobbing machine of the present invention. FIG. 3 shows an example of a partial sectional view of another hobbing machine of the present invention and a hydraulic circuit diagram of a feeding device. FIG. 4 shows an example of a partial sectional view of another hobbing machine of the present invention. FIG. 5 shows an example of a partial sectional view of another bob machine of the present invention.

Claims (1)

[Claims] [¥1¥] (a) Tool drive shaft (2) that drives the tool (1)
) and a machining gear shaft (4) that drives the workpiece gear material (3)
Set up. (b) Install a feed device (5) that linearly shifts the distance between the tool drive shaft (2) and the machining gear shaft (4). (c) The feed device (5) is associated with a control device that controls the feed speed so as to be switchable between rapid feed and minute feed. (d) At a machining position where the tool (1) and the gear material (3) are in predetermined engagement, the control device is set so that the tool (1) and the gear material (3) can be switched in advance to perform fast forwarding in a direction that increases the relative distance between them. (E) As a drive source for driving the feeding device (5), a drive source (6) for when the power is on and a drive source (7) for the time of power outage are provided. (f) In the event of a power outage, the drive source at the time of the power outage (7
) supplies power so that the distance between the axes of the tool (1) and gear material (3) is rapidly enlarged. With the above configuration, there is provided a quick return device for a gear processing machine during a power outage, which is characterized in that the distance between the axes of the tool (1) and the gear material (3) is rapidly enlarged and retreated during a power outage. [¥2¥] Hydraulic cylinder (8) as feeding device (5)
When using the accumulator (9) in the event of a power outage,
Gear machining according to claim 1, characterized in that the hydraulic cylinder is rapidly retreated by the hydraulic pressure accumulated in the hydraulic cylinder, and the distance between the axes of the tool (1) and the gear material (3) is rapidly enlarged and retreated. Rapid return device during machine power outage. [￥3￥] When the feed screw (10) is driven by an electric motor (11) as the feed device (5), in the event of a power outage, the electric motor (11) is driven by a generator or battery, and the tool (1) 2. A quick return device for a gear processing machine during a power outage according to claim 1, characterized in that the distance between the axes of the gear material (3) and the gear material (3) is rapidly enlarged and retreated. [¥4¥] When the feed screw (10) is driven by an electric motor (11) as the feed device (5), a drive device (12) separate from the electric motor (11) is provided, and in the event of a power outage, Claim 1, characterized in that the feed screw (10) is driven by another drive device (12), and the distance between the axes of the tool (1) and the gear material (3) is rapidly enlarged and retreated.
A quick return device during a power outage for the gear processing machine described in Section 2.