JPH0534812Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a hole punching device for punching out sheet metal materials and the like.

<Prior art> A hole punching device consists of a punch fixed at the tip of a ram that moves up and down, and a die into which the punch is fitted. Punching and processing.

<Problems to be Solved by the Invention> Completion of the hole-drilling process using the punch and die is confirmed using a gauge, a proximity switch, etc. that detects the pressure of the downward movement of the ram.

In this case, if punch scum remains, the pressure will rise to the set pressure on the pressure gauge even if the hole is not clear, resulting in a false determination that the hole is open and a signal will be output. Furthermore, since proximity switches and the like cannot detect with the required accuracy, they sometimes incorrectly determine that a hole has been formed when the punch hits the workpiece and output a signal.

<Means for Solving the Problems> The present invention was made to improve the above-mentioned problems, and its characteristic configuration is a punch fixed to the tip of a ram that moves up and down, and this punch. A hole punching device comprising a cylindrical work holding member made of an elastic material that surrounds the outer periphery and is compressively deformed, and a die into which the punch fits, the punch has an axial passage within its shaft. A hole is provided at the base of the punch, and an outlet hole is formed at the tip of the punch in a radial direction so as to communicate with the passage hole and open at the outer peripheral surface of the punch, and the workpiece holding member is always in communication with the inlet hole. The die is provided with a signal exit hole for the air or light beam that communicates with the exit hole at a punch stroke position after completion of drilling the workpiece.

<Function> With the above configuration, the air or light beam signal input to the passage hole of the punch is output from the exit hole on the punch side and the signal output on the die side when the punch fits into the die and punches a hole in the workpiece. The holes communicate and output air or light signals to ensure completion of drilling.

<Example> Hereinafter, an example of the present invention will be described based on the drawings. In FIG. 1, 1 is a ram that moves up and down, 2 is a punch fixed to the tip of the ram 1, and 3 is a cylindrical work holding member that surrounds the outer periphery of the punch 2 and is made of an elastic material that can be compressed and deformed. It is. 4 is a die into which the punch 2 is fitted, and W is a workpiece set on the die 4.

The present invention provides the punch 2 with an axial passage hole 5 in its shaft, and the base of the punch 2 with an inlet hole 6 that opens on the outer circumferential surface in the radial direction and communicates with the passage hole 5. The tip of the punch 2 is provided with an exit hole 7 that opens at the outer periphery in the radial direction and communicates with the passage hole 5, and the work holding member 3 is provided with a signal input hole 8 that constantly communicates with the inlet hole 6. ing.

On the other hand, the die 4 is provided with a signal output hole 9 that communicates with the outlet hole 7 at the punch stroke position after completion of drilling the workpiece.

10 is an input signal of air or light beam, and 11 is an output signal of the same. 12 is a sensor for detecting the presence or absence of the output signal 11;

Since the present invention has the structure as described above, for example, when air is input and output signals 10 and 11 are set,
When the punch 2 is raised, the outlet hole 7 is closed by the workpiece holding member 3, so that the air constantly inputted from the input hole 8 is stopped within the passage 5.

When the punch 2 moves downward and fits into the die 4 as shown in FIG. 2, the work holding member 3
contacts the workpiece on the die 4 and presses it, compressing and deforming it in the axial direction, and the exit hole 7 is opened by the relative displacement with the punch 2. Then, a hole is made in the workpiece W, and the punch waste WS is transferred to the signal exit hole 9 of the die 4.
The outlet hole 7 is communicated with the signal output hole 9 when the outlet hole 7 is pushed downward from the inlet of the signal output hole 9.
The output signal is output from the die 4 as an output signal. The sensor 12 detects this output signal 11 and determines that the drilling process has been reliably completed.

If the drilling process is not performed reliably, the output signal 11 will not be output, so this is confirmed by the sensor 12, and an alarm 14 such as a buzzer or lamp is activated, and A signal 13 from a sensor 12 is used to control the operation of the ram 1, such as repeatedly moving it up and down, or stopping it due to a machining defect.

Note that an optical fiber may be used when a light beam is used as a signal.

<Effects of the Invention> As described above, according to the present invention, since the punch and the die are provided with a configuration in which an air or light beam signal is passed through the punch and the die and the signal is output when the punch completes drilling the workpiece, Completion of drilling can be reliably confirmed without misjudgment, and the workpiece holding member also has the advantage of being used as a member for blocking signals from the exit hole on the punch side.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the present invention, and FIG. 2 is a sectional view of the present invention in a hole-drilled state. 1... Ram, 2... Punch, 3... Work holding member, 4... Die, 5... Passage hole, 6... Inlet hole, 7... Outlet hole, 8... Signal input hole, 9... Signal output hole.

Claims (1)

[Scope of utility model registration request] A punch fixed at the tip of the ram that moves up and down,
In a hole punching device comprising a cylindrical work holding member made of an elastic material that surrounds the outer periphery of the punch and is compressively deformed, and a die into which the punch is fitted, A passage hole is provided at the base of the punch, an outlet hole is formed at the tip of the punch in communication with the passage hole in the radial direction, and the hole is opened at the outer peripheral surface of the punch, and an inlet hole and an outlet hole are formed in the work holding member. The die is provided with a signal input hole for air or light beam that is always in communication, and the die is provided with a signal exit hole for the air or light beam that communicates with the exit hole at a punch stroke position after completion of drilling the workpiece. A hole punch device.