JP3136040U - Former - Google Patents

Abstract

An object of the present invention is to make it possible to inspect 100% of defective factors such as damage and deformation of a bottomed hole portion of a hollow part formed by forging on the rear side of a former.
In a former that forges and molds a hollow part A having a bottomed hole portion a by forging a metal material with a punch and a die corresponding thereto, a hollow molded product A having a bottomed hole portion on the front side is formed. While having a forging portion for forging forming, a holding die 6 for receiving and holding the hollow molded product A on the rear stage side of the forging portion, and moving with other punches on the moving ram side, and holding die 6 side when moving forward A hole inspection mechanism having a hole inspection gauge punch 7 that is inserted into the bottomed hole portion a of the hollow molded product A held in the hole and detects a failure factor such as a hole diameter reduction, damage or deformation of the bottomed hole portion a. It is provided.
[Selection] Figure 4

Description

  The present invention relates to a former that forges a metal material with a punch and a die corresponding to the punch to forcibly form a hollow part such as a bolt having a bottomed hole.

  Conventionally, in this type of former, when forging a hollow part having a bottomed hole, for example, in a high-speed multi-step process, the hole diameter of the bottomed hole is reduced or damaged by chipping, wear, or a damaged punch. As a means of detecting defects such as deformation, a detector that detects the forging load is provided in each forging process, and this is detected by fluctuations in the forging load during forging molding, and the former is stopped when a large load fluctuation occurs. A sensor system is provided.

  However, according to the sensor system described above, when forging a hollow molded product having a bottomed hole, it works effectively when the forging load fluctuates greatly due to tool breakage or basic setup failure. For example, if the punch breaks after completion of forging, or if the punch tip is slightly damaged or worn due to long-term use, extremely large load fluctuations Since this does not occur, its function does not work sufficiently. Therefore, there is a problem that a hollow molded product whose bottomed hole portion is damaged or deformed cannot be detected and is discharged as a good molded product or transferred to the next step.

  Therefore, an object of the present invention is to provide a former capable of inspecting all defects on the downstream side of the former, such as hole diameter reduction, damage or deformation of the bottomed hole portion of the hollow part formed by forging.

  In order to solve the above-described problem, the invention described in claim 1 of the present application forges a metal material with a punch and a die corresponding to the punch, and forcibly forms a hollow part such as a bolt having a bottomed hole. The former has a forging part for forging a hollow molded product having a bottomed hole on the front side, a holding die for receiving and holding the hollow molded product on the rear side of the forging part, and another for the moving ram side. Hole inspection gauge that moves with the punch of the hole and is inserted into the bottomed hole part of the hollow molded product held on the holding die side during its advancement to detect defects such as hole diameter reduction, damage or deformation of the bottomed hole part A hole inspection mechanism having a punch is provided.

  Further, in the device according to claim 2 of the present application, the hole inspection mechanism according to claim 1 is supported so as to be movable back and forth on the moving ram side and is always urged to protrude to the die side by the urging means, A hole inspection gauge punch configured to move forward with the moving ram and retreat to the ram side against the biasing means by abutting against the bottomed hole portion, and to be able to enter and leave the hollow hole portion of the gauge punch At the same time, it is biased toward the holding die by the biasing means and protrudes a certain amount forward from the tip surface of the gauge punch, and when the tip surface of the gauge punch reaches the bottom surface of the bottomed hole, Detects whether there is a difference between the detection pin that moves back into the gauge punch so that it is flush with the tip surface, and the tip surface of the gauge punch and the detection pin when the moving ram completes advancement. If there is an electrical signal, Wherein the output to includes or broadcast such as a lamp or a buzzer, or a hole tester to stop the former.

  According to the present invention, on the rear side of the forging portion, the holding die for receiving and holding the hollow molded product having the bottomed hole portion formed by forging, and the moving ram side moves together with the other punches, and at the time of its advancement There is a hole inspection mechanism with a hole inspection gauge punch that is inserted into the bottomed hole part of the hollow molded product held on the holding die side and detects defects such as hole diameter reduction, damage or deformation of the bottomed hole part Therefore, it is possible to inspect the hole diameter reduction, damage or deformation of the bottomed hole part in the hollow molded product based on defective factors such as chipping, wear, breakage, etc., on the front side punch of the forging part. Can be discharged to a predetermined location as an acceptable product or transferred to the next process.

  Further, the hole inspection mechanism is supported so as to be movable back and forth on the moving ram side, and is always urged to protrude to the die side by the urging means, and moves forward together with the moving ram so as to come into contact with the bottomed hole portion. A hole inspection gauge punch configured to retreat to the ram side against the urging means, and supported by the hollow hole portion of the gauge punch so as to be retractable and normally attached to the holding die side by the urging means. It is pushed forward by a certain amount from the tip surface of the gauge punch and retracts into the gauge punch so that it is flush with the tip surface of the gauge punch when the tip surface of the gauge punch reaches the bottom surface of the bottomed hole. When the forward movement of the detection ram and the moving ram is completed, it is detected whether there is a difference between the tip surface of the gauge punch and the tip surface of the detection pin. Or a buzzer, or If a hole inspection device that stops the former is provided, the non-defective product is available only when the tip of the gauge punch reaches the bottom of the bottomed hole and the detection pin is flush with the tip of the gauge punch. Therefore, it is preferable because the hole inspection by the hole inspection device can be performed with high accuracy.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, FIG. 1 shows a former according to the present invention, wherein 1 is a frame body, 2 is a moving ram that reciprocates within the frame, and the rotation of the main shaft is transmitted via a crank mechanism (none of which is shown). Communicated.

  Denoted at 3 is a punch arranged at the tip of the moving ram 2 at a predetermined interval, and a die 5 is provided on the die block 4 on the corresponding fixed side. The punch 3 and the die 5 are used in the illustrated example in four stages, and the material cut into a predetermined length by the punch 3 and the die 5 is sequentially forged from rough to fine and has a bottomed hole portion a. The hollow molded product A is formed by forging. Then, the holding die 6 that receives and holds the hollow molded product A targeted by the present invention in the fifth stage, and moves with the other punches 3 to the corresponding moving ram 2 side, and the holding die 6 at the time of its advancement Hole inspection mechanism provided with a hole inspection gauge punch 7 that is inserted into the bottomed hole portion a of the hollow molded product A held in the hole and detects a failure factor such as a hole diameter reduction, damage or deformation of the bottomed hole portion a. 8 are provided.

  As shown in FIG. 2, the hole inspection mechanism 8 is supported by the moving ram 2 so as to be movable back and forth via a punch holder 9, and is always urged by a spring 10 so that the tip portion protrudes toward the holding die 6 side. And a hole inspection gauge punch 7 configured to move forward with the moving ram 2 and retract toward the moving ram 2 against the spring 10 by contact with the bottomed hole a, and a hollow of the gauge punch 7 It is supported by the hole 72a so that it can be withdrawn and retracted, and is always biased toward the holding die 6 by the spring 11 so as to protrude forward by a certain amount from the tip surface of the gauge punch 7, and the tip surface of the gauge punch 7 has a bottomed hole. a detection pin 12 that retreats into the gauge punch 7 so as to be flush with the front end surface of the gauge punch 7 when reaching the bottom surface of a, and a front end surface of the gauge punch 7 and the detection pin 12 when the movement of the moving ram 2 is completed. Between the tip surface of Detecting whether there is a difference comprises or broadcast by such as a lamp or a buzzer to output an electrical signal to determine the defective when there is a difference, or a hole inspector 13 to stop the former.

  The gauge punch 7 has a central shaft hole 71b with a stepped portion 71a at the center, and is fixed to a cylindrical main body 71 having a flange 71c at the outer peripheral intermediate portion, and a front small diameter portion of the central shaft hole 71b of the cylindrical main body 71. And the gauge punch portion 72 having a cross section substantially the same shape as the cross sectional shape of the bottomed hole portion a of the hollow molded body A. A hollow hole 72 a for incorporating the detection pin 12 is formed at the center of the gauge punch 72. The cylindrical main body 71 is supported by the fitting hole 9a of the holder 9 so as to be movable back and forth, and at the same time, by a spring 10 interposed between the large-diameter hole portion 9b of the fitting hole 9a and the flange portion 7b. The tip end portion of the cylindrical main body 71 and the gauge punch portion 72 are provided so as to protrude toward the front surface side of the holder 9.

  The detection pin 12 includes a front end detection portion 12a and a flange portion 12b on the front side, and a pin body 12d provided with a stopper portion 12c on the rear end portion. The detection pin 12 is a hollow hole portion of the gauge punch portion 72. 72a is supported so as to be movable back and forth, and is always urged toward the holding die 6 by the spring 11, so that the tip detecting portion 12a protrudes a certain amount forward from the tip surface of the gauge punch portion 72, and the tip surface of the gauge punch portion 72 Is configured to retract so that the tip detection portion 12a is flush with the tip surface of the gauge punch portion 72 when it reaches the bottom surface of the bottomed hole portion a.

  Further, a sensor 13a of the hole detector 13 for detecting the movement of the detection pin 12 from the presence or absence of contact with the front surface of the stopper portion 12c is provided between the stopper portion 12c and the gauge punch portion 72 in the detection pin 12. It has been. The sensor 13a is always in contact with the stopper portion 12c, and the tip surface of the gauge punch 7 and the tip surface of the detection pin 12 are determined based on whether or not the stopper portion 12c contacts the sensor 13a when the moving ram 2 is advanced. If there is a difference (while remaining in contact), the hole detector 13 determines that the product is defective, and if it determines that the product is defective, the detector 13 It is configured to output an electric signal to notify with a lamp or a buzzer, or to stop the former.

  Next, the operation at the time of hole inspection in the former equipped with the hole inspection mechanism as described above will be described.

  As shown in FIG. 2, a hollow molded product A having a bottomed hole portion a formed by forging on the front stage side is held by a holding die 6 and the moving ram 2 is advanced under the holding state to carry out a hole inspection cage. The punch 7 is inserted into the bottomed hole a of the hollow molded product A.

  When the hollow molded product A having the bottomed hole portion a is a non-defective product, the gauge punch portion 72 of the hole inspection gauge punch 7 enters the bottom surface of the bottomed hole portion a as shown in FIG. The detection pin 12 is retracted into the gauge punch portion 72 against the spring 11 so that the tip detection portion 12 a is flush with the tip surface of the gauge punch portion 72. When the forward movement of the moving ram 2 is completed, the detection pin 12 is retracted into the gauge punch portion 72, so that the stopper portion 12c does not contact the sensor 13a. Accordingly, the hole detector 13 determines that there is no difference between the tip surface of the gauge punch 7 and the tip surface of the detection pin 12 based on the off operation of the sensor 13a, and as a result, there is an abnormality in the bottomed hole portion a. The hollow molded product A is judged as a good product. Thus, the electrical signal from the hole detector 13 is not output, and after the hole inspection gauge punch 7 is retracted by the retraction of the moving ram 2, the hollow molded product A is pushed forward from the holding die 6 as usual. The product is discharged as a non-defective product by a transfer chuck (not shown) or transferred to the next process.

  On the other hand, when the hollow molded product A having the bottomed hole portion a is defective, the gauge punch portion 72 of the hole inspection gauge punch 7 enters the bottom surface of the bottomed hole portion a as shown in FIG. Disappear. Therefore, the detection pin 12 is in a state in which the tip detection portion 12a of the detection pin 12 remains protruding, and the detection pin 12 is not retracted into the gauge punch portion 72 of the detection pin 12. When the forward movement of the moving ram 2 is completed, the detection pin 12 is not retracted into the gauge punch portion 72, so that the stopper portion 12c remains in contact with the sensor 13a. As a result, the hole detector 13 determines that there is no difference between the tip surface of the gauge punch 7 and the tip surface of the detection pin 12 based on the continuous ON operation in which the sensor 13a is not turned off, and as a result, the hole detector No. 13 has an abnormality in the bottomed hole portion a, and the hollow molded product A is determined as a defective product. As a result, an electrical signal is output from the hole detector 13 and notified by appropriate notification means such as a lamp or a buzzer, or the former is stopped.

  The defective hollow molded product A remaining on the holding die is removed by being dropped and discharged directly from the holding die as a defective product, for example, by forcibly opening a material transfer chuck (not shown). become.

  As described above, according to the former of the present invention, the hole diameter reduction, damage, or deformation of the bottomed hole portion a based on the defective factors such as chipping, wear, breakage, etc. of the front side punch 3 is all processed in the fifth step on the rear side. It can be inspected, and only acceptable products can be discharged to a predetermined location as acceptable products or transferred to the next process.

  In addition, as a shape of the bottomed hole part a, a square hole, a hexagonal hole, Torx etc. may be sufficient other than a circular hole, for example.

  It is a top view of the former which concerns on this invention.   It is a vertical side view of a hole inspection mechanism.   It is a vertical side view which shows the non-defective product detection operation by a hole inspection mechanism.   It is a vertical side view which shows the defect detection operation | movement by a hole inspection mechanism.

Explanation of symbols

2 moving ram 3 punch 5 die 6 holding die 7 hole inspection gauge punch 8 hole inspection mechanism 10 spring 11 spring 12 detection pin 13 hole inspection device

Claims (2)

  Forging that forges and molds hollow parts such as bolts with a bottomed hole by forging a metal material with a punch and a die that corresponds to it, forging a hollow molded product with a bottomed hole on the front side. A holding die for receiving and holding the hollow molded product on the rear stage side of the forging portion, and a hollow molded product that moves with the other punches on the moving ram side and is held on the holding die side during its advancement A former having a hole inspection mechanism having a hole inspection gauge punch that is inserted into the bottomed hole portion to detect defects such as a reduction in diameter, damage or deformation of the bottomed hole portion.   The hole inspection mechanism is supported on the moving ram side so as to be movable back and forth, and is normally urged to protrude to the die side by the urging means, and is advanced with the moving ram and urged by contact with the bottomed hole portion. A hole inspection gauge punch configured to retreat to the ram side against the means, and supported by the hollow hole portion of the gauge punch so as to be retractable and normally biased to the holding die side by the biasing means. A detection pin that protrudes a certain amount forward from the tip surface of the gauge punch and retracts into the gauge punch so that it is flush with the tip surface of the gauge punch when the tip surface of the gauge punch reaches the bottom surface of the bottomed hole. When the moving ram is fully advanced, it is detected whether there is a difference between the tip surface of the gauge punch and the tip surface of the detection pin. If there is a difference, it is judged as a defective product and an electric signal is output to output a lamp or buzzer. For example, or Former of claim 1, characterized in that it comprises a hole tester to stop over.

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