JPS595000A - Detector for foreign matter for press - Google Patents

Abstract

PURPOSE:To provide a titled device which detects surely and quickly foreign matter, and can prevent the generation of defective products and the failure of dies, etc. by the constitution wherein the sliding of a piston of a hydraulic cylinder for detecting pressure mounted to a bolster is detected with sensors. CONSTITUTION:A hydraulic cylinder 10 for detecting pressure is fixed on at least one side of a bolster 2, and the piston 11 thereof is connected to the upward extending rod 8 of a hydraulic cylinder 7 which moves the bolster 2 upward and downward at a high speed, in a press machine mounted with the bolster 2 and a lower die 3 in the upper part of a press body 1 and provided with an upper table 4 and an upper die 5. The pressure in the pressure chamber 12 in the cylinder 10 is kept higher than the working pressure of the cylinder 7. If foreign material remains in the dies and the pressure in the cylinder 7 rises to exceed the pressure in the chamber 12, the piston 11 slides in the cylinder 10, and the sliding movement thereof is detected by the sensors 13, 14 mounted to the rod 8 and the cylinder 10, which sensors stop immediately the operation of the cylinder 7 or a main cylinder 6 for blanking.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention detects foreign objects reliably and quickly in a press machine, especially a press machine used for FB processing (precision punching), thereby preventing the occurrence of defective products and damage to molds, etc. This can be prevented directly.

Generally, if product or piercing slug remains in the mold, it is necessary to activate a conventional device and automatically stop the press material before applying pressure in the next stroke. Fig. m1 shows an example of a conventional construction device 914, and the iron is inserted into the cylinder (a) for pressurized oil supply distribution (b) to increase the pressure of the pressurized oil. It is constructed by arranging a pressure sensor (0) for detecting foreign matter which is operated by the following.

However, detection of hydraulic pressure changes caused by folding does not always have good responsiveness, and as a result, there have been cases where products with wrinkles or folds have deteriorated, leading to damage to the mold. 3. It is an object of the present invention to provide a foreign object detection device w capable of solving the drawbacks of the conventional detection method mentioned above, that is, capable of quickly and reliably detecting the presence of foreign objects. .

The present invention is a foreign object detection device that is attached to both 9111 of a fixed rectangular frame and is attached to a high-speed lifting hydraulic cylinder that rapidly lifts and lowers a bolster on the fixed frame, and the device is a foreign object detection device that is attached to a hydraulic cylinder for high-speed lifting and lowering that rapidly lifts and lowers a bolster on the fixed frame. The pressure of the Yamakawa hydraulic cylinder is 157 N so that it faces the oil release cylinder, and the piston of the detection hydraulic cylinder is connected to the same extension rod above the speed-up hydraulic cylinder, and the cylinder above the piston is spaced apart. is a pressure chamber, and the pressure of the penetration hydraulic pressure of the same pressure is always higher than the hydraulic pressure of the hydraulic cylinder for high-speed lifting, and the upward extension rod of the hydraulic cylinder for high-speed lifting and the extraction pressure cylinder for detection or This invention relates to a foreign matter loading and unloading system for a press, characterized in that a sensor for detecting phase movement between the two sides is disposed between the bolsters.

Hereinafter, the present invention was co-edited based on the example shown in the drawing attached to T'W+A. Fig. 2 schematically shows a press for FB processing equipped with the above-mentioned foreign object detection device, and (1) shows the press base salary. ,
(2) is listed above the same press base salary (1), and above (3)
), the lower pot type (3) is fully equipped with a bolster, (4) is the upper table with a stopper mold (5) at the bottom, and (6) is the upper t.
The punching main cylinder (7) that brings one mold (3) into contact with and separates from the i The tip of the bolster (2
) This is a hydraulic cylinder for quick pumping that connects to both ends of the cylinder.

In the Joki customs, the foreign object detection device that supports the present invention is installed on one side of the bolster (2), and in the figure, tll indicates both sides of the bolster (2). The ratio cylinder 11, αυ, is a piston that is slidably disposed in the same hydraulic cylinder OcJ and that slows down the tip g8 of the upward extension rod (8) of the hydraulic cylinder for vertical displacement (7).
11; t piston (k above cylinder αυ by 1υ
Pressure chamber formed in m, II: 4 is upwardly telescopic rod I
The one-side sensor element 114 installed in the middle of I has its base end attached to the outer wall of the cylinder port 1, and the one-side sensor element 0 (
The sensor element (j1) on the other side is attached to the sensor element (j1) in opposition to the support (support). Also, the hydraulic pressure of the pressure silkworm (p
l) It is always higher than the working oil pressure (p2) of the hydraulic cylinder (7) for high-speed lifting, that is, PL>92. Further, FIG. 3 shows a specific embodiment of the foreign matter detection device, and the operation of the FB processing machine that handles the 0-glue construction, particularly the foreign matter detection device, will be described.

Generally, when performing FB machining, the piston (6a) of the main cylinder (6) for lifting the bolster 12+ and the lifting cylinder (6) is rapidly raised and lowered by driving the hydraulic cylinder (force, (7)) for high-speed lifting. In lifting and lowering, the pressure p1 (#!l is 15ψ) of the pressurized oil is increased by the working oil pressure P2 (for example, 10 kp, z2n) of the F hydraulic cylinder (7).
! ) is larger, so there is no relative movement of the screw (21D) that falls inside the Norinda 119. A journey from this point 1
There is no relative movement between the first sensor element 11 and the other sensor element (+!9, and the detection device - does not operate. After that, after moving up and down to the press position, the drive of the high-speed lifting hydraulic cylinder (7) is stopped. Then, the punching main cylinder (6) is fully driven and the so-called arm-shaped product is punched out using the G die (3) and the stopper die (5). In this case, in the next stroke, the pressure of the hydraulic cylinder (7) for increasing the sieving speed 4 increases due to contact between the lower mold 13) and the product, and when this becomes υ larger than the hydraulic pressure p1 of the pressure M011, the high-speed lifting and lowering is performed. The rise of the hydraulic cylinder (7) causes a relative displacement vJ of the piston 11υ in the pressure &in cylinder 111, and at the same time brings about a phasewise shift wJ of the other side sensor element (151) with respect to the -■lI sensor element 1111). As a result, the sensor elements 11 (8) (19) are activated and the driving of the hydraulic cylinder (7) for punching or the main cylinder for punching (6) is stopped.0 The foreign matter is removed from the mold. .

Is this actual implementation? 14 &C's detection device is the second most dangerous.
It is also possible to install a conventional pressure sensor (Ill) which is activated by an increase in pressure, as shown in FIG. This can be done by stopping the cylinder at the same time.

As mentioned above, FB processing machine 1 related to this helmet W3
The four-object detection system has the advantage of quickly and accurately detecting foreign objects within the entire area. )

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the main parts of the conventional #41112I stock removal equipment-0, and Figure 2 is an FB equipped with the #4 stock removal iron shed according to the present invention.
FIG. 3, which is a schematic diagram of the processing machine, is a vertical side view of one embodiment of the foreign object detection device. In the figure, tj)...Press body (2)...Bolster 13)...Lower string die (4)...Upper table (5)...Upper mold (6)...For striking body Main cylinder・71...Hydraulic cylinder for speed ratio for ifllI speed increase・Upward extension rod 01...Fllll pressure cylinder for pressure release θl...Piston 117J...Pressure shop (1st floor) ...-side sensor thread ([41...sensor support bracket l!9...
Other side sensor element patent applicant Hiraide Press Kogyo Co., Ltd. (and 1 other person) Agent Masu Kobori (and 2 others) Figure 2

Claims (1)

[Claims] 1. A foreign object detection device that is installed on both sides of a fixed frame and is attached to hydraulic cylinders for commercial transportation that rapidly lowers and lowers the bolsters on the fixed frame, the foreign object detection device being equipped with hydraulic cylinders for high-speed lifting and lowering on at least one side of the bolster. A hydraulic cylinder for pressure use is fixed in a pair, and the piston of the detection hydraulic cylinder is connected to the upper extension rod of the high-speed valve controller hydraulic cylinder, and the cylinder chamber above the piston is used as a pressure peak. The pressure of the sealed hydraulic pressure of the same amount is always lower than the working pressure of the hydraulic cylinder for high-speed lifting, and the pressure between the upper extension rod of the hydraulic cylinder for commercial speed lifting and the hydraulic cylinder or bolster for lifting is maintained between the two. A foreign object detection device for presses that is patented as having a sensor that detects relative movement.