JP2019177414A - Insert collar, and manufacturing method thereof - Google Patents

Abstract

To provide an inexpensive insert collar excellent in slip-prevention and whirl-stop function; and to provide a manufacturing method thereof.SOLUTION: An inexpensive insert collar excellent in slip-prevention and whirl-stop function, has a cylindrical collar body 10 formed by pressure molding a rod-like metal material, a plurality of vertical grooves 20 formed by pressure molding similarly on a lower half of an outer peripheral surface of the collar body, and extending along the axial direction, and a knurl part 30 applied to the outer peripheral surface of the collar body by rolling molding.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a method for manufacturing an insert collar embedded in a resin member or a metal member.

  An insert collar embedded in a resin member, a metal member, or the like is required to have a retaining and non-rotating function. Thus, some conventional insert collars have knurled outer peripheral surfaces of a cylindrical collar body. In addition, when a desired retaining and anti-rotation function cannot be obtained only by knurling, there is one in which an annular groove is formed on the outer peripheral surface like the insert collar shown in Patent Document 1.

Registered Utility Model No. 3103899

  However, when manufacturing an insert collar having a knurling process and an annular groove on the outer peripheral surface of the cylindrical collar body, a forging process for forming the cylindrical collar body and a rolling process for forming the annular groove or the annular groove This requires three steps, namely, a step of cutting the material and a rolling step of performing knurling, which has a problem that leads to an increase in manufacturing cost.

  The present invention has been created in view of the above problems, and an object of the present invention is to provide an insert collar that is excellent in retaining and anti-rotation functions at low cost and a method for manufacturing the same.

  The above-mentioned problems include a cylindrical collar body formed by forging a rod-shaped metal material, and a plurality of longitudinal grooves formed in the lower half of the outer peripheral surface of the collar body by the forging molding and extending along the axial direction. And an insert collar having a knurled portion applied to the outer peripheral surface of the color main body by roll forming.

  In addition, the above-mentioned problem is to form a cylindrical collar body by forging a rod-shaped metal material, and at the same time, apply a plurality of longitudinal grooves along the axial direction to the lower half of the outer peripheral surface of the collar body. Furthermore, it can be solved by a method of manufacturing an insert collar in which a knurled portion is provided on the outer peripheral surface of the color main body by rolling.

  According to the present invention, since the insert collar is formed only by the forging step and the rolling step, it is possible to provide an insert collar that is excellent in retaining and anti-rotation functions at low cost and a method for manufacturing the same.

It is a figure which shows the forging process in the manufacturing method of the insert collar which concerns on this invention. It is a front view of the insert collar after a forging process. FIG. 3 is a bottom view of FIG. 2. It is a front view of the insert collar after a rolling process. It is a longitudinal cross-sectional view of the insert collar shape | molded by the manufacturing method of the insert collar which concerns on this invention.

  Embodiments of an insert collar manufacturing method according to the present invention will be described below with reference to the drawings.

  4 and 5, reference numeral 1 denotes an insert collar molded by the insert collar manufacturing method according to the present invention. The insert collar 1 has an insert collar body 10 formed in a cylindrical shape, and a plurality of vertical grooves 20 are formed in the lower half of the outer peripheral surface by a forging process described in detail later. The longitudinal grooves 20 extend from the lower end edge of the insert collar body 10 to the middle portion along the axial direction, and are provided at eight intervals in the circumferential direction.

  Further, a knurled portion 30 is applied to the entire outer peripheral surface of the insert collar body 10 by a rolling process, which will be described in detail later.

  The insert collar 1 is formed by a forging process and a rolling process. First, as shown in FIG. 1, in a forging process by a forging machine (not shown), a rod-shaped metal material 10a cut to a predetermined length is inserted into a receiving mold 2 and compressed by inserting from above. Mold the outline of the body. At this time, eight protrusions 3 are provided on the inner peripheral surface of the receiving mold 2, and the vertical grooves 20 of the insert collar body 10 are formed by the protrusions 3 as shown in FIGS. 2 and 3. Is done.

  Further, in the forging process, by inserting a pin (not shown) from below the receiving die 2 with the metal material 10a pressed from above, the insert collar body 10 has a through hole 11 along the axial direction. Molded.

  Subsequently, as illustrated in FIGS. 4 and 5, in the rolling process, the knurled portion 30 is formed on the outer peripheral surface of the pressed insert collar body using a knurling rolling machine.

  According to the insert collar 1, the vertical groove 20 formed on the outer peripheral surface does not reach the upper end edge of the insert collar body 10, and the wall portion 20 a is formed at the end of the vertical groove 20. The wall portion 20a functions as a stopper to prevent the insert collar 1 from being removed when the insert collar 1 is embedded in a resin member or the like.

  Moreover, according to the said insert collar manufacturing method, the insert collar 1 excellent in the retaining and anti-rotation functions can be manufactured only by the forging step and the rolling step.

  The specific configuration of each part of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Insert collar 2 Receiving type | mold 3 Protrusion part 10 Insert collar main body 11 Through hole 20 Vertical groove 20a Wall part 30 Knurling part

Claims (2)

A cylindrical collar body formed by forging a rod-shaped metal material;
Similarly, a plurality of vertical grooves formed along the axial direction are formed in the lower half of the outer peripheral surface of the collar body by forging,
A knurled portion applied to the outer peripheral surface of the color main body by rolling molding,
An insert collar characterized by having. By molding a rod-shaped metal material, a cylindrical collar body is molded, and at the same time, a plurality of longitudinal grooves along the axial direction are applied to the lower half of the outer peripheral surface of the collar body,
Next, by rolling forming, a knurled portion is applied to the outer peripheral surface of the color main body,
A method for producing an insert collar characterized by the above.

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