JPS6230062B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application This invention is applicable to hollow products with holes such as nuts and other various metal parts by forging metal materials in stages from coarse to fine using punches and dies. It is used for manufacturing and processing.

Technical Background of the Invention When metal parts are pressed and formed using a continuous multi-stage former, the punches and dies are subject to severe wear and damage due to repeated continuous processing at high speeds, resulting in the formation of predetermined holes. This often results in defective products due to failure or differences in thickness or dimensions.

By the way, if such a defective product occurs, there is a risk that it will be sent to the next process by the transfer chuck and be hit by a punch again, so this type of machine is equipped with an inspection device that immediately stops the machine when an abnormality is detected. There is something that has been done.

Conventional technology However, conventional inspection equipment is
As seen in No.-1170, No. 56-17981, etc.
When an abnormality is detected, the defective product is removed and at the same time a limit switch is activated to automatically stop the machine, but even if the switch is activated, the machine does not stop immediately because the inertia of the machine drive shaft is large. It is inevitable that the punch will operate many times before coming to a complete stop. However, there is a risk that the removed defective products may be mixed into good products.
There is a drawback that it takes time and effort to sort them.

OBJECT OF THE INVENTION The present invention addresses these conventional drawbacks, and its purpose is to receive good products through a movable chute as they are extruded from the final die, and to remove defective products. The object of the present invention is to provide a device for sorting out good or bad molded products in a former that can reliably perform sorting by stopping the movement of the chute as soon as an abnormality is detected. Even if it takes time for the machine to stop, this device does not stop the movement of the transfer chuck, ensures that defective products are taken out of the system without mixing with good products, and safely stops the machine without any problems. The point is to provide the following.

Another object of the present invention is to provide an apparatus capable of automatically and unmannedly transporting good products to the next process through a transport pipe at the same time that they are received in a receiving chute.

Structure Therefore, in this invention, when the movable ram moves forward and backward, the punch is pushed into the die provided on the opposing fixed base side to perform heading, and at the same time, the hole aperture and thickness are adjusted. Or, in a former equipped with an inspection mechanism that detects the quality of the forged product by detecting differences in the amount of retraction and retraction movement of the gauge pin on the die side due to the pushing of the punch due to uneven dimensions, etc., a blank is placed on the die side corresponding to the movable ram. A molded product receiving chute that moves back and forth between the molded product receiving position immediately in front of the die and a dislocated position on the side in synchronization with the transfer movement of the transfer chuck, and a molded product receiving chute that protrudes with a detection signal when an abnormality is detected. A stop mechanism is provided for stopping the chute at a position away from the receiving position, and the molded product receiving chute is interlocked via an interlocking mechanism taken out from the transfer chuck drive shaft. The mechanism is provided with a clutch mechanism configured to disengage when a predetermined resistance is applied to the chute side.

The chute may be formed of an open or airtight transport pipe.

Embodiment Figures 1 and 3 show an apparatus for inspecting the clearness, thickness, etc. of holes when holes are drilled in the final heading process. A pushing rod 2 made of a pipe is attached adjacent to another punch 3, and a sleeve 5, which moves backward when pushed by the pushing rod 2, is mounted on the corresponding die 6 side, and a gauge pin 7 is mounted inside the die 6. Provided with a loose fit. The sleeve 5 is connected to a knockout pin 9 via an interlocking pin 8, with the rear end of the knockout pin 9 facing a knocker arm 10. A detection body 11 is attached to the rear end of the knockout pin 9.
A detector 12 consisting of a proximity switch is provided.
is facing. The gauge pin 7 is brought into contact with another detector 15, such as a limit switch, via a link 13 and a detection lever 14.

The detection lever 14 is elastically biased by a spring 16 so that the gauge pin 7 is supported by the lever end 14a against this spring pressure.

The knockout pin 9 is slidably inserted into the fuselage 4 and supported, but if it moves loosely, it is impossible to detect differences in the amount of movement. The brake is energized and supported so that movement by pushing can be performed accurately. 19 is a spring pressure adjustment screw.

The inspection mechanism for detecting the quality of the forged molded product has the above-mentioned configuration, and its operation will be explained next.
Once the hole is punched out, transfer check 2
It is chucked at step 1 and fed between the pushing rod 2 and the die 6, where it is inspected.

FIG. 4 shows a case where a good product is supplied. In this case, when the molded product 20 is pushed into the die 6 by the advancement of the pushing rod 2, the gauge pin 7 is inserted into the hole of the molded product.
Since only the sleeve 5 is pushed by the pushing rod 2 when the sleeve 5 is inserted, the pushing distance l is constant. However, in the case of a defective product with no holes punched, the pushing rod 2 is pressed as shown in Fig. 5. 2, the gauge pin 7 is also moved back by a corresponding distance l', so that the detection lever 14 is pushed rearward via the connecting rod 13 and swings about the fulcrum shaft 14b, thereby activating the detector 15. Further, as shown in FIG. 6, even if the hole is open, if the hole diameter is smaller than the normal diameter, the gauge pin 7 is pushed at this time as well, and the detector 15 is activated in the same manner as described above.

Furthermore, if the thickness is not constant, the sleeve 5 will be in a position shifted back and forth from the normal pushing position, resulting in a difference in the amount of backward movement of the knockout pin 9.
This is detected by the detector 12.

FIG. 7 shows a case where the punched scraps 20a are supplied without being removed. In this case, when the pushing rod 2 is pushed in, the gauge pin 7 is inserted to push out the scraps, so in this case none of the detectors is activated. The extruded dregs are pushed into the hollow hole 2a of the pushing rod 2 and discharged to the outside from the rear discharge passage 2b.

FIG. 2 shows a device according to the invention. In this figure and FIG. 1, a chute 22 for receiving molded products is attached to a slider 23 fitted in a part of the body 4, and reciprocates in a linear motion together with the slider. A socket 24 is opened in a part of the chute 22, and the molded product 20 is received through the socket 24. The slider 23 and therefore the chute 22 are connected to the interlocking mechanism 2 taken out from the transfer chuck drive shaft 25.
6. Interlocking mechanism 26
is an output shaft 27 directly connected to the shaft end of the drive shaft 25, and a crank 2 provided between the shaft and the slider 23.
8 and a crank arm 29. A clutch mechanism 30 is provided in this interlocking mechanism 26, but when the load generated on the chute 22 becomes large and reaches a predetermined value, the clutch 30 automatically disengages and the transmission of power to the chute 22 is interrupted. It operates in such a way that it drips down.

The stop mechanism 31 applies the above-mentioned load to stop the movement of the chute 22, and stops the movement of the clutch 30 by engaging the crank arm 29 with an engagement pin 32 that protrudes freely toward the fuselage 4 side. It is something that makes you 33 is its engagement hole. The engagement pin 32 is an electromagnet or a hydraulic cylinder,
Alternatively, the mounting position and engagement portion may be mechanically or electrically moved by operating a cam or the like, but the mounting position and engaging portion may be arbitrarily selected without being limited to the illustrated example.

Function: The transfer chuck 21 is connected to the main shaft 3.
4 to the drive shaft 25 via the worm gear 35, and the chuck holder 37 reciprocates in the left-right direction (arrows A and I') for each rotation of the crank via the crank mechanism 36 at the end of the shaft. The items are transported sequentially.

In conjunction with the reciprocating movement of the transfer chuck 21, the rotation of the output shaft 27 taken out from the drive shaft 25 causes the slider 23 to move in the left and right directions (arrows R, R) via the interlocking mechanism 26 in the same way as the chuck holder 37. ), and each movement moves between a molded product receiving position immediately in front of the die 6 in the inspection section and a position outside of the molded product receiving position on the side thereof. At the molded product receiving position, the center of the die 6 and the socket 24 of the chute 22 face each other and are close to each other. A molded product (good product) is extruded and placed into the chute 22 at that moment. The molded product introduced into the chute 22 is sent out to a predetermined location from the end port of the chute, but if the delivered product is sent to the predetermined location via an airtight transport pipe by an air flow pumped from the air pipe 22a. For example, one by one can be automatically fed to the feeding section of the next processing machine for each heading-forming operation, and can be continuously supplied.

During normal operation, a molded product that has been knocked out is always extruded from the die in the final process with each movement of the ram and is received into the chute 22 each time, but if a defective product occurs, the inspection mechanism An abnormality is detected by the detector 12 or 15, and the machine is stopped when the detector 12 or 15 is activated. At the same time, the stop mechanism 31 operates and the engagement pin 32 protrudes instantaneously, so that when the engagement hole 33 of the crank arm 29 faces the opposite position, the engagement pin 32 is fitted into the engagement hole 33. As a result, the slider 23 is prevented from sliding, and the chute 22 is stopped at a position laterally away from the center of the die 6 as shown in FIG. Good products) are not accepted by the chute and fall directly below the die 6. This blocking of the chute 22 from sliding generates a load on the clutch 30, so the movable clutch pawl 30a moves in the disengagement direction against the bias of the clutch spring 37 due to the action of the cam, and the clutch is automatically disengaged. . Therefore, since the rotation of the drive shaft 25 continues as it is, only the chute 22 stops while the movement of the transfer chuck 21 in the left and right directions A and A' remains unchanged.

Effects of the Invention This invention has the above-mentioned configuration. During normal operation, the chute for receiving the molded product moves in synchronization with the movement of the transfer chuck with each movement of the ram, and moves the chute to the molded product receiving position immediately in front of the die at the inspection position. The molded parts can be reciprocated between the molded parts and the outside position on the side to receive good products into the chute, so molded products can be accurately collected one by one to the designated location and sent as is to the required location. Production efficiency can be greatly increased through continuous work, and when a defective product is detected, the inspection mechanism is activated and instantly stops the reciprocating movement of the chute in a locked position to the side.
Defective products pushed out in front of the die at the inspection position will fall as they are, and will not be accepted into the chute. Therefore, they can be separated from good products and collected separately, so there is no risk of non-defective molded products being mixed in.
However, even if the stop switch is activated at the same time as an abnormality is detected and the machine does not stop immediately due to inertia, there is no effect. In addition, defective products can be detected over a wide range of areas, without being limited to hole clarity, thickness differences, or dimensions, making it highly practical and reliable.
Moreover, it has advantages such as a simple device and easy implementation.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view of the case where the present invention is implemented in the final process section of a multi-stage former, FIG. 2 is a longitudinal sectional front view taken from line AA in FIG. 1, Figure 3 is a vertical side view taken along the line B-B in Figure 1, Figures 4, 5, and 6 are enlarged vertical side views of the die portion in the inspection section, Figure 4 is normal, Figure 5 is , FIG. 6 shows an abnormal situation. FIG. 7 is an enlarged sectional view of a portion of the die in the case of hole clogging, and FIG. 8 is a sectional view taken along line CC in FIG. 3. 1...Moving ram, 2...Pushing rod, 3...Punch, 4...
Body, 5... Sleeve, 6, 6'... Dice, 7... Gauge pin, 9... Knockout pin, 11... Detector, 12, 15... Detector, 14... Detection lever, 2
0... Molded product, 21... Transfer chuck, 22
...Chute, 24...Socket, 25...Drive shaft, 26...
Interlocking mechanism, 30...clutch mechanism, 31...stop mechanism.

Claims (1)

[Claims] 1. When the movable ram moves forward and backward, the punch is
At the same time as pressing into the die provided on the opposing fixed base side, the difference in the amount of retraction movement of the gauge pin on the die side due to the pushing of the punch is detected based on the hole openness, thickness, unevenness of dimensions, etc. In a former equipped with an inspection mechanism for detecting the quality of a forged product, the molded product receiving position immediately before the die and the side thereof are placed on the die side corresponding to the moving ram in synchronization with the transfer movement of the transfer chuck for transferring the blank. A molded product receiving chute that moves back and forth between a position outside the receiving position, and a stop mechanism that protrudes in response to a detection signal when an abnormality is detected and stops the chute at a position outside the receiving position. Features: A device for sorting and taking out molded products in a homa. 2. A clutch mechanism configured to interlock the molded product receiving chute via an interlocking mechanism taken out from the transfer chuck drive shaft, and to disengage when a predetermined resistance is applied to the chute side during the interlocking mechanism. An apparatus according to claim 1, characterized in that it is provided with: 3. The apparatus according to claim 1, wherein the molded product receiving chute is formed of an open or airtight transport pipe.