JP3119876U - Screw rolling device - Google Patents

Abstract

An object of the present invention is to discriminate defective products by removing a dent or the like in a screw thread of a bolt material with a head and simultaneously detecting a crack in the head of the bolt material.
On a fixed rolling die 5 side of a thread rolling device 1 provided with a roller rolling die 4 and an arc-shaped fixed rolling die 5 arranged oppositely on the outer periphery of the roller rolling die 4. A sliding body 7 slidable in the radial direction of the roller rolling die 4 is supported. The sliding body 7 is elastically brought into contact with the base portion of the shaft portion of the bolt material A via a spring 9 and swings at a predetermined angle while sliding the sliding body 7 in the radial direction following the rotational movement of the bolt material A. A rocking lever 10 that moves is provided. The swing lever 10 is provided with a crack detector 11 that swings together with the lever 10 and continues to detect cracks in the head while the bolt material A rotates at least once, and based on the detection result by the detector 11. A defective product removing means 12 is provided for discriminating between a good product and a defective product, and rejecting the defective product separately from the good product.
[Selection] Figure 1

Description

  The present invention comprises a roller rolling die and an arc-shaped fixed rolling die arranged opposite to the outer periphery of the roller rolling die, and a bolt material with a head rotates between these rolling dies. In particular, the present invention relates to a screw rolling device that forms a screw thread on the outer periphery of a shaft portion of a bolt material by rolling or corrects the thread.

  Conventionally, a bolt material with a head that has been screw-rolled by, for example, a screw rolling device is mainly subjected to heat treatment, plating, and the like in a subsequent process. In that case, there is a problem that unevenness such as a dent is generated in the screw thread of the bolt material when passing through a process such as heat treatment or plating. For example, a screw rolling device for re-rolling is used to re-roll the thread portion again to eliminate dents.

  By the way, according to the above-described thread rolling apparatus for re-rolling, although it is possible to repair uneven scratches such as dents in the thread of the bolt material, the bolt comprising the head portion and the shaft portion by a forging molding machine. There has been another problem that a crack (crack) is generated in the head when the element body is formed by forging. For the bolt material in which this crack has occurred, in addition to the dent removal process by the above-described thread rolling device for re-rolling, the presence or absence of a crack in the head using a crack detection device that is manually operated or specially provided for the bolt material. There is a problem in that it is confirmed, whether it is a non-defective product or a defective product is specially performed in a separate process, and then only the non-defective product is boxed, and the determination work is very complicated and time-consuming.

  Therefore, the present invention can remove the dents in the screw thread of the bolt material with the head mainly generated when passing through processes such as heat treatment and plating, and at the same time, detects cracks in the head of the bolt material. It is an object of the present invention to provide a thread rolling device that can determine defective products.

  In order to solve the above-described problems, the present invention includes a roller rolling die and an arc-shaped fixed rolling die disposed on the outer periphery of the roller rolling die so as to face each other. This is a screw rolling device that forms a screw thread on the outer periphery of the shaft portion of the bolt material by rolling rolling or corrects the thread when the bolt material with a portion rotates and moves on the fixed rolling die side. While supporting a sliding body that is slidable in the radial direction of the rolling die, it elastically contacts the base of the shaft portion of the bolt material via an elastic member and follows the rotational movement of the bolt material. A swing lever that swings a predetermined angle while sliding the sliding body in the radial direction, and swings with the lever to the swing lever so that the bolt material rotates at least once during the rotation of the bolt material. A crack detector that continues to detect cracks, Based on the detection result by the output unit performs the discrimination between good and defective, the defective product characterized by comprising a defective removing means for separately excluded defective.

  According to the thread rolling device of the present invention, it is possible to remove the dents and the like in the screw thread of the bolt material with the head generated when passing through processes such as heat treatment and plating. At the same time as removing the traces, the swing lever swings at a certain angle while sliding the sliding body in the radial direction following the movement of the bolt material that moves while rotating between the two rolling dies. With a crack detector provided on the swing lever, it is possible to detect the presence or absence of cracks in the entire circumference of the head of the rotating bolt material. Based on the detection result of the presence or absence of cracks by this detector, it is possible to discriminate between a non-defective product and a defective product, and the defective product can be excluded from the non-defective product by the defective product elimination means.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a screw rolling device according to the present invention. 1 shows a thread A3 formed by rolling rolling on the outer periphery of a shaft portion A2 of a bolt material A with a head A1 that has been forged by, for example, a forging machine. A thread rolling device 2, a chute for sequentially transferring the bolt material A to the screw rolling device 1, 3 an opening / closing body 3a for opening and closing the tip opening 2a of the chute 2 and supplying the bolt material A downward one by one The provided opening / closing supply mechanism 4 is disposed in front of the tip opening 2a of the chute 2, and is a roller rolling die that is rotated intermittently or continuously by a driving means (not shown) such as a motor. This is an arc-shaped fixed rolling die that is arranged on the outer periphery of the die 4 so as to face each other.

  A sliding body 7 slidable in the radial direction of the roller rolling die 4 is supported on an appropriate support member 6 on the fixed rolling die 5 side via a guide body 8, while The base material of the shaft part A2 of the bolt material A that moves while rotating between the dies 4 and 5 is elastically brought into contact with the base part of the bolt material A via the spring 9, and the sliding body 7 is slid in the radial direction following the movement of the bolt material A. A swing lever 10 that swings a predetermined angle while being moved is provided, and the swing lever 10 swings together with the lever 10 to detect a crack a in the head A1 while the bolt material A rotates at least once. A crack detector 11 that continues to be provided is provided, and further, a non-defective product eliminating means 12 that discriminates a non-defective product from a non-defective product based on a detection result by the detector 11 is provided. .

  The defective product removing means 12 is provided with a product discharge passage 13 at the lower part on the rolling end side, and branches into a non-defective product discharge passage 14 and a defective product removal passage 15 in the middle of the product discharge passage 13. A switching damper 16 is provided for switching between the non-defective product discharge passage 14 and the defective product removal passage 15 based on the detection result of the detector 9.

  An adjustment screw 17 for adjusting the swing angle of the swing lever 10 is attached to the guide body 8 so as to be finely adjustable. The minimum swing angle of the swing lever 10 may be equal to or greater than the movement angle when the bolt material A makes one rotation.

  Next, the bolt material A with head A2 formed by forging by a forging machine and then threaded A3 formed on the outer periphery of the shaft A2 by the screw rolling device 1 is passed through processes such as heat treatment and plating, After that, when removing the dents in the thread A3 of the bolt material A generated when the screw rolling device 1 again passes through processes such as heat treatment and plating, the crack a of the head A1 is simultaneously removed. The operation for detection will be described.

  First, as shown in FIG. 1, the bolt material A is continuously transferred to the tip opening 2 a via the chute 2. Thereafter, with the roller rolling die 4 stopped, the opening / closing body 31 of the opening / closing supply mechanism 3 is retracted to open the tip opening 2a, and the leading bolt material A is fixed to the fixed rolling die 5 and the roller rolling die. 4 to supply. The opening / closing body 31 of the opening / closing supply mechanism 3 is closed at the timing when the supply is completed. Thereafter, the roller rolling die 4 is rotated, and dents and the like in the thread A3 are removed by rolling by the screw forming portion of the roller rolling die 4 and the screw forming portion of the fixed rolling die 5.

  The swing lever 10 moves the sliding body 7 in the radial direction following the movement of the bolt material A moving while rotating between the two rolling dies 4 and 5 simultaneously with the removal process of the dents and the like in the thread A3. Swing a predetermined angle while sliding. At that time, the presence or absence of crack a in the entire circumference of the head A1 of the rotating bolt material A is detected by the crack detector 11 provided on the swing lever 10. Based on the detection result of the presence or absence of crack a by the detector 11, discrimination between a non-defective product and a defective product is performed. Here, when there is no crack a in the head A1 of the bolt material A and it is determined that it is a non-defective product based on the detection signal from the detector 11, the switching damper 14 is not switched as shown in FIG. And the non-defective product discharge passage 12 is opened, and there is a crack a in the head A1 of the bolt material A. The detector 11 detects this and a defective signal is detected by the detection signal output from the detector 11. If it is determined, the non-defective product discharge passage 14 is closed by the switching damper 16 as shown in FIG. As a result, when the re-rolling is completed and the bolt part A is determined to be a non-defective product, the bolt part A is discharged to the non-defective product discharge passage 14 and boxed. Will be excluded in a different location from non-defective products.

  As described above, according to the thread rolling device 1 according to the present invention, the dents and the like in the thread A3 of the bolt material A generated when passing through the steps of heat treatment, plating, etc. can be removed. Simultaneously with the removal process of the dents, the head of the bolt material A is detected by the crack detector 11 provided on the swing lever 10 that swings while sliding the sliding body 7 in the radial direction following the movement of the bolt material A. The presence or absence of a crack a in the part A1 is detected, and a non-defective product is discriminated from a non-defective product by the defective product removing means 12 for the defective product based on the detection result by the detector 11. Can be eliminated.

  In the above description, in order to remove the dents and the like in the thread A3 of the bolt material A with the circular head A2 that has occurred when passing through processes such as heat treatment and plating, the screw rolling apparatus for rolling again. Although explained, when the thread A3 is formed on the outer periphery of the shaft portion A2 by the thread rolling device 1 after being forged by the other forging machine, the bolt is detected by the crack detector 11 provided on the swing lever 10. The presence or absence of a crack a in the head A1 of the material A is detected, and a non-defective product is discriminated from a non-defective product based on the detection result by the detector. Of course, it may be configured to be excluded elsewhere.

  It is a front view of the screw rolling device concerning the present invention.   It is expansion explanatory drawing of the crack detection state by the screw rolling apparatus.   It is operation | movement explanatory drawing of the screw rolling apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Thread rolling apparatus 4 Roller rolling die 5 Fixed rolling die 7 Sliding body 8 Guide body 9 Spring 10 Oscillating lever 11 Crack detector 12 Defective product elimination means A Bolt material A1 Head A2 Shaft A3 Thread

Claims (1)

  A roller rolling die and an arc-shaped fixed rolling die arranged oppositely on the outer periphery of the roller rolling die, and when the bolt material with the head rotates between these rolling dies, the bolt A thread rolling device that forms a screw thread on the outer periphery of a shaft portion of a material by rolling or corrects the thread, and is slidable in the radial direction of the roller rolling die on the fixed rolling die side The sliding body is elastically brought into contact with the base portion of the shaft portion of the bolt material via an elastic member and follows the rotational movement of the bolt material, while sliding the sliding body in the radial direction as described above. A swing lever that swings at an angle, and a crack detector that swings with the lever and continues to detect cracks in the head while the bolt material rotates at least once, Non-defective and defective based on the detection result by the detector And the determination was carried out, thread rolling apparatus characterized by comprising a defective removing means for separately excluded as good for defective.

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