JP3083522U - Round steel bar cutting blade - Google Patents

Abstract

(57) [Problem] To provide a blade for cutting a steel bar at a right angle. SOLUTION: A right angle cutting can be performed by providing a concave portion (slip) in a vertical direction on an upper blade and a lower blade. The concave portion of the upper blade is deep and the concave portion of the lower blade is shallow, so that the depth is 3: 1. The recess is provided slightly inside the outer diameter.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a round steel bar cutting blade.

[0002]

[Prior art]

 In the process of manufacturing automotive parts, the first step starts with cutting a round bar. Various steel materials are cut continuously, and the bending increases depending on the steel type. In shearing cutting, bending occurs when cutting. With the prior art, right angle cutting was not possible. Since many problems occur in the next step, perpendicular cutting is required.

[0003]

[Problems to be solved by the invention]

 Achieve a right angle cut of a round bar so that no trouble occurs in the next step.

[0004]

[Means for Solving the Problems]

 According to the present invention, an upper blade provided with a groove which is a recess in the vertical direction slightly inside the outer diameter, and a cylindrical groove provided in the center and vertically in the center a little inside the outer diameter. It relates to a round steel bar cutting blade composed of a lower blade.

[0005]

[Embodiment of the invention]

 First, the upper blade will be described. The upper blade 1 has a shape as shown in FIG. 1 and has three blade portions 2 in a substantially circular shape. A shallow concave portion 3 is inserted in the longitudinal direction from the inside of 5 mm to 6 mm on both sides of the portion corresponding to the outer diameter of the blade portion 2. This forms a groove.

Next, the lower blade will be described. The lower blade 4 has a hole 5 through which a round steel bar comes out in the center, and has a cylindrical shape. A shallow concave portion 6 is formed from the inside of the hole 5 by 5 mm to 6 mm from the inside. A groove is formed in the center in the vertical direction.

[0007] In addition, a straight portion having nothing at the portion 7 appears. For example, as for the shape in the case of a material diameter of 46 mm, the depth of the groove which is the concave portion of the upper blade is 0. About 6 mm, the depth of the groove, which is the concave portion of the lower blade, is preferably about 0.2 mm. That is, it is preferable that the depth 3 of the concave portion of the upper blade and the depth 1 of the lower blade be 3 to 1. The clearance between the upper blade and the lower blade is about 0.3 mm.

FIG. 2 is a plan view of the upper blade 1, and FIG. 3 is a plan view of the lower blade. A line 8 indicates an outer diameter, and a line 9 also indicates an outer diameter of the hole 5. FIG. 4 shows the shape of the groove formed by the concave portions of the upper blade and the lower blade.

FIG. 5 shows a state in which a bent steel material is corrected. The portion shaped by A is brought to B, and the portion shaped by C is brought to D.

FIG. 6 shows a front shaping unit.

FIG. 7 shows a state in which the squareness is obtained after shaping.

FIG. 8 is a side view showing the relationship between the lower blade, the upper blade, and the round bar.

[0013] With the straight portion as a reference ground, a large bend makes the groove of the concave portion (small) deep, and a small bend makes the groove shallow. The height is the same as the straight part and the shaped height.

Next, the three points of perpendicular cutting are shown as follows: (1) The depth of the groove is 3: 1 with the upper blade being 0.6 mm and the lower blade being 0.2 mm. (2) The width of the groove is a concave groove from about 5 mm inside from the outer diameter. (3) The clearance between the upper blade and the lower blade is 0.3 mm. E in the figure is a steel material.

[0015]

[Effect of the invention]

 By inserting concave grooves (slip) into the upper blade and the lower blade, it is possible to cut a round bar at right angles.

[Brief description of the drawings]

FIG. 1 is a front view showing a relationship between an upper blade and a lower blade.

FIG. 2 is a plan view of an upper blade.

FIG. 3 is a plan view of a lower blade.

FIG. 4 shows a shape of a groove formed by an upper blade and a lower blade.

FIG. 5 is a front view of the steel material showing a state in which the bending of the steel material is corrected.

FIG. 6 is a front view of a steel material showing a shaping portion.

FIG. 7 shows a front view of the steel material at a right angle.

FIG. 8 is a side view showing a relationship among a lower blade, an upper blade, and a round bar.

[Explanation of symbols]

 Reference Signs List 1 upper blade 2 blade portion 3 concave portion 4 lower blade 5 hole 6 concave portion 7 straight portion 8 line indicating outer diameter 9 line indicating outer diameter

Claims (1)

[Utility model registration claims] 1. An upper blade provided with a groove, which is a concave portion, slightly inside an outer diameter in a longitudinal direction, and a cylindrical, centrally, vertically provided groove, which is a concave portion, slightly inside an outer diameter. Consisting of a lower blade,
Round steel bar cutting blade.