JPS5831625Y2 - Machine tool movement position detection device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a device that detects the moving position of a cutting tool in a machine tool and automatically performs rapid forwarding, cutting forwarding, rapid reversing, etc.

Conventionally, in machine tools such as milling machines, lathes, and drill presses, in order to detect the movement position of the cutting tool and obtain a predetermined amount of machining, a limit switch was installed at the stroke end position of the tool rest, etc., and a limit switch was installed at the stroke end position of the tool rest. This is done by stopping the feeder when the switch is pressed, or by detecting the rotational speed of the feeder shaft (as a pulsed koji).

Even if the above-mentioned detection means is available, the wiring work for the switch etc. to the machine tool needs to be done by matching the actual item, and the complicated installation work takes a lot of effort and the detection accuracy is also reduced. There are problems such as not being able to obtain superior products.

This idea was made in order to solve the above-mentioned conventional problems.The circular dock is rotated by the feed shaft, and the amount of movement is replaced with the circumference of this circular dock, and the rotation of this dock is □
The purpose of the present invention is to provide a device that operates the switch inch to control the feed motor, eliminates the need for limit switch installation work on the machine tool, and performs highly accurate detection.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in the figure, a feeding device 2 and a detection device 3 are attached to a case 1.

The detection device 3 includes a main shaft 4 rotatably supported by a case 1 via a bearing, a circular dock 5 attached to the tip of the main shaft 40 protruding outside the case 1, and a circular dock 5.
and a limit switch 6 disposed on the outside of the outer periphery.

The case 1 is attached to a part of the machine tool that moves together with the cutting tool, using an appropriate attachment γ so that the main shaft 3 is coaxial with the handle shaft 8.

The machine tool is, for example, a drilling machine, and a mounting bracket 9 is fixed to the end face of a handle shaft 8 that raises and lowers the cutter by rotation, and a protruding shaft 10 provided on the mounting bracket 9 and the main shaft 40
The proximal end side is connected by a key connection so that they rotate together.

The circular dock 5 has three rings 11 on its outer circumferential surface as shown in the figure.
are attached by means such as screws so that their positions can be freely adjusted in the circumferential direction.

The moving distance of the cutter will be replaced by the outer periphery of this ring.

Each ring 11 has a limit switch 6 disposed at a position on the outer periphery of each ring 11.
A recessed step 12 is provided in each case.

Each limit switch 6 has roles such as rapid forwarding, cutting forwarding, and rapid return, and is electrically connected to each motor to control the motor of the feeding device 2, which will be described later.

The feeding device 2 includes a motor 13 for rapid feeding in the middle of the case 1.
A shaft 1 is attached to the case 1 so as to be interlocked with the output shaft of the motor 13 via the large-diameter gear 14 and the small-diameter gear.
A small diameter gear 16 is fixed to the main shaft 4 and this shaft 15.
An intermediate shaft 17 is rotatably provided in the middle.

A large diameter gear 18 that meshes with the small diameter gear 16 of the shaft 15 and a small diameter gear 20 that meshes with the large diameter gear 19 attached to the main shaft 4 are fixed to the intermediate shaft 1γ, so that the rotation of the motor 13 is decelerated and the main shaft is rotated. I'm starting to get the message across to 4.

Case 1 has a cutting motor 2 located at the bottom end in Figure 1.
1, and an intermediate shaft 22 is installed between this motor 21 and the shaft 150.

This intermediate shaft 22 includes a small diameter gear 23 which is fixed to mesh with the shaft 150 and the large diameter gear 14, and a gear which is fixed to and released from the intermediate shaft 22 by an electromagnetic clutch 24 which is free with respect to the intermediate shaft 22. 25 are provided.

The gear 25 meshes with a small diameter gear 26 attached to the output shaft of the motor 21, and when the clutch 24 acts on the connection side, the rotation of the motor 21 is decelerated and transmitted to the main shaft 4.

The limit switch 6 described above is electrically connected to the motors 13, 21 and the clutch 24 connected to the feeding device 2.

This device has the above-mentioned structure, and when the cutting tool is placed in the highest position when the drilling machine is installed, the ring 11 of the circular dock 5 is attached to its base with respect to the limit switch 6 fixed to the case 1 by appropriate means. The end position is facing, and the clutch 24 is in an open state.

To perform drilling in this state, the motor 13 is energized.

The rotation of the motor 13 transmits the rotation to the shaft 15, intermediate shaft 17, and main shaft 4 through gears, and...the handle shaft 8 rotates, resulting in rapid traverse in which the cutter descends.

The circular dock 5 rotates together with the main shaft 4, and when a fast-forward stroke is detected by the ring and limit switch, the fast-forward motor 13 is de-energized, and at the same time the clutch 24 and the cutting motor 21 are energized.

When the motor 21 is started and the clutch 24 is operated to the connecting side, the rotation of the motor 21 is transmitted to the main shaft 4 in a state of deceleration rather than the rapid traverse, and cutting is performed.

At this time, the fast-forwarding motor 13 is driven to rotate in a free state.

When a certain cutting stroke is reached, the clutch 24 and motor 21 are de-energized, and at the same time, the motor 13 for fast-forwarding 9 is energized to rotate in the opposite direction to the fast-forwarding direction, causing the blade to return quickly. The motor 13 is turned off and stopped when the base end of the ring faces the limit switch. Detect and send 9
It controls the

The example shown in FIG. 3 is used to improve detection accuracy or to use a large cutting tool when the movement stroke of the cutter is large.
By decelerating the 40 rotations of the main shaft and transmitting it to the dog 5, the linear movement distance of the cutter can be expanded to the outer circumference of the ring 11 attached to the dog 5, and the detection accuracy improves in proportion to the magnification. Become.

As described above, according to this invention, the amount of movement of the cutting tool can be detected by extracting it from the outer periphery of the circular dog, and wiring work for limit switches etc. can be done regardless of the machine tool, eliminating the need for on-site construction. In addition, since the moving distance of the cutter can be set around the outer circumference of the dock, detection accuracy can be improved by selecting the diameter of the dock and the rotation transmission ratio. A part of the main shaft that protrudes from the case of the main shaft includes a main shaft, a fast-forward motor that drives the main shaft, a cutting motor, and an electromagnetic clutch that is incorporated between a gear mechanism that interlocks the cutting motor and the main shaft. Since the dock is attached to the machine, the entire device is compact and can be easily installed on an existing machine tool, making it possible to downsize the entire device.

[Brief Description of the Drawings] Fig. 1 is a longitudinal sectional front view showing the state in which the detection device of this invention is used, Fig. 2 is a longitudinal sectional side view of the main part of the same, and Fig. 3 is another example of the same main part. FIG. 3...Detection device, 4...Main shaft, 5...
...Circular dock, 6...Seat switch, 11...Ring, 12...Concave step.

Claims (1)

[Scope of utility model registration request] A case 1 includes a rotatable main shaft 4 connected to a feed handle shaft of a machine tool, a fast-feeding motor 13 that drives the main shaft 4 via a gear mechanism, and a gear mechanism with an electromagnetic clutch 24 interposed in the middle. A cutting motor 21 for driving the main shaft 4 is attached through the main shaft 40, and a circular dock 5 with a ring 11 fitted thereon is attached to the part of the main shaft 40 protruding from the case 1, and a recessed step 12 is provided on the outer periphery of the ring 11. , said ring 1
A limit switch 6 for controlling a feeding motor 13, a cutting motor 21, and an electromagnetic clutch 24 is placed at an outer position on the outer periphery of the ring 1, and is actuated by detecting the recessed step 12 of the ring 11. A machine tool movement detection device characterized by the following: