JPH04101707A - Automatic rotational speed changing mechanism - Google Patents

Abstract

PURPOSE:To machine a complex laminated material each layer of which having a different cutting condition by a single cutting device by providing an air sensor to detect cutting resistance of a member to be cut and a control means to change over the rotational speed of an air motor in the cutting tool rotational speed automatic changing mechanism. CONSTITUTION:When a start lever 1 is turned to ON, a special air valve unit 2 is actuated so that air supply is started to rotate a driving air motor 3 and to transfer a feed mechanism 4. Consequently, the air motor 3 startes rotation with cutting conditions set for a member 8, and the feed mechanism 4 advances for cutting the member cutting tool 5 passes through the member 8 and enters a member 9, an air sensor 6 for detecting the cutting resistance detects the cutting resistance value of the member 9. Due to a detection signal passing through a signal communication circuit 7, air exhaust quantity or air supply quantity is automatically adjusted by the air valve unit 2, so that the rotational speed of the air motor 3 is changed over to the rotational speed for the member 9. Then, when the cutting tool 5 enters a member 10, the rotational speed returns to the same rotational speed as that for cutting the member 8 due to a change of the cutting resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotation speed conversion mechanism for a cutting tool that is applied to machining multi-layered members having different cutting conditions.

[Conventional technology]

An example of a conventional pneumatic cutting tool is shown in FIG.

In the figure, 1' is the start lever, 2#''i is the pulp for operation, 3' is the air motor, l is the feed mechanism, and g is the cutting tool that operates the start lever l' with ON/OFF.
Driving air flows into the air motor 3' through the valve z't, causing the air motor 3' to rotate, and the cutting tool attached to its front end to rotate as well. On the other hand, driving air also flows through the feed mechanism 4' which is connected in series with the air motor, and the cutting tool moves forward due to the feed mechanism 4' to cut a workpiece (not shown).

[Problem to be solved by the invention]

By the way, the above-mentioned conventional apparatus is not equipped with a control mechanism for converting the rotational speed of a rotating cutting tool, and it is impossible to process multi-layered members with different cutting conditions using one apparatus. Therefore, with existing conventional equipment, the only way to process the double tank N1 member with different cutting conditions is to use a processing method that uses multiple cutting devices.

The problem with the Hashi method is that it has extremely poor workability such as processing accuracy and time, making it impossible to adapt to actual work.

The present invention aims to solve the above-mentioned problems and provide a new automatic rotation speed conversion mechanism.

[Means to solve the problem]

The automatic rotational speed conversion mechanism of the present invention consists of an air motor that operates with compressed air, a rotary cutting tool driven by the air motor, and an air sensor that detects the cutting resistance of the workpiece, which are arranged in series. At the same time, a control device is connected to these devices, which adjusts the displacement or supply air amount of the air motor and changes the rotational speed of the air motor based on the cutting resistance detection signal from the air sensor. It is characterized by

[Effect]

The above-mentioned automatic rotation speed conversion mechanism of the present invention is applied to the workpiece material '
! In order to facilitate the machining of laminated members with completely different cutting conditions, the cutting equipment is equipped with an air sensor that detects the cutting resistance value f' set for each laminated member during cutting. The detected signal [! ,
9 It is now possible to automatically convert the rotation speed of the air motor by adjusting the air motor displacement or air supply amount, allowing a single cutting device to process completely different cutting conditions, which was previously impossible. Laminated members can now be processed easily.

〔Example〕

One embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a schematic diagram of a variable rotation speed type 1 according to an embodiment of the present invention, and FIG. 3 is a diagram illustrating the principle of the rotation speed conversion mechanism of the present invention.

In these figures, 1Fi star) L/bar 2 is a special air pulp unit, 3Fi drive air motor
4 is a feed mechanism, and 5 is a cutting tool.

An air sensor 6 for detecting cutting resistance is disposed between an air motor 3 operated by compressed air and a cutting tool 5. 7/fi This is a signal communication circuit that connects the cutting resistance measuring air sensor 6 and the special air pulp unit 2. 8,9. io indicates each member of the laminated workpiece materials having different cutting conditions, and as the cutting tool 5 moves in the direction of the arrow, each member 8°9.10 is sequentially cut.

Next, to explain the operation of this device, by operating the start lever 11- to the ON position, the special air pulp unit 2 is activated. The drive air motor 30 rotates and air supply to the feed mechanism 4 begins. As a result, the drive motor 3 is first set for the first member 8 and starts rotating under the original cutting conditions, and the feed mechanism 4 starts moving forward. Then, the member 8 is cut.

Next, when the cutting tool passes through the first member 8t and enters the next member 9, the cutting resistance detection air sensor 6ti is set to detect the cutting resistance value for the ninth member 9.

The detected signal passes through the entire signal communication circuit 7 to the special air valve unit (2) which is the control device! Ru.

FIG. 3 shows the relationship between cutting resistance and flow rate according to the present invention in this case.

Next, the gK cutting tool 5 passes through the member 9 and the member 10. According to the device of the present invention, these repeated operations can be continued indefinitely.

Although one embodiment of the present invention has been described in detail above, the present invention is not limited to the above-mentioned embodiment. The design can be changed in various ways without departing from the above.

〔Effect of the invention〕

As described above, according to the automatic rotation speed conversion mechanism of the present invention, an air sensor for detecting cutting resistance that automatically detects the optimum cutting conditions set for each member of a plurality of laminated workpieces and a drive By controlling the special air pulp control device that automatically adjusts the air exhaust volume or air supply volume of the air motor, a single cutting machine can process laminated materials with completely different cutting conditions that were previously impossible to process with a single machine. This makes it easier to do.

The adoption of the octopus mechanism greatly shortens cutting time, and at the same time, the adoption of all-air drive and control provides extremely high noise safety when working on materials with high stain conductivity.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of a rotating speed variable type device according to an embodiment of the present invention, FIG. 2 is a schematic side view of a conventional device, and FIG. 3 is a diagram illustrating the principle of the invention. l・-start lever 2-special air valve unit) (control i&)3・-・
Driving air motor 4 - feed mechanism, 5 - cutting tool, 6 - air sensor for cutting resistance detection 7 - signal communication circuit, 8.9.10 one member.

Claims (1)

[Claims] (1) An air motor operated by compressed air, a rotary cutting tool driven by the air motor, and an air sensor that detects the cutting resistance of the workpiece are connected in series, and
A rotation speed characterized in that a control device is connected to these devices to change the rotation speed of the air motor by adjusting the displacement amount or air supply amount of the air motor based on the cutting resistance detection signal from the air sensor. Automatic conversion mechanism.