JPH11147153A - Working method of joint surface of steel plate for friction grip joint using high-tensile bolt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To work corrugation of a plurality of rows on surface of steel plate for jointing exactly and keeping high productivity by forming corrugation of a plurality of rows on surface of steel plate for jointing by form rolling. SOLUTION: A stage 11 is equipped on a base 8 through a stage feeding screw 9 movably by driving of a geared motor 10, a form rolling roll 1 having corrugation of a plurality of rows in the width direction of the roll on the upper part of a frame body 12 of the base 8 is equipped on the top end of an ascent and descent screw 13, and the form rolling roll 1 is equipped through the ascent and descent screw 13 ascendably and descendably by driving of a geared motor 10a. And, after steel plate 3 for jointing is fixed on the stage 11 with a clamp 14, the form rolling roll 1 is brought into contact with an end of moving direction of the steel plate 3 for jointing, and then the stage feeding screw 9 is revolved by driving the geared motor 10, and corrugation of a plurality of rows is formed on the surface of the steel plate 3 for jointing by moving the stage 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing a joint surface of a steel plate for high strength bolt friction joining.

[0002]

2. Description of the Related Art As a method of machining a joining surface of a steel plate for high-strength bolt friction joining, a plurality of rows of corrugated grooves or pyramid-shaped projections are cut on a contact surface by rotating a disc-shaped saw blade. The formation is disclosed in JP-A-8-291565.

[0003]

As described above, in the method of machining a joint surface of a steel sheet for friction joining by cutting, the material yield (weight of steel sheet after working / weight of steel sheet before working) is reduced due to the cutting work. In addition, there is a problem that a process such as removal of cutting chips from a processing surface, separation of cutting chips from cutting oil, and conveyance of cutting chips is required, and thus productivity is reduced. The method of the present invention has been made in order to solve such problems advantageously, and by rolling the joining surface of the friction-joining steel sheet, the productivity is improved, and the high slip as the friction joining surface is ensured. It is an object of the present invention to provide a method for processing a joint surface of a steel plate for high-strength bolt friction joining, which forms a plurality of rows of corrugated grooves capable of securing a coefficient.

[0004]

A feature of the method of the present invention is that a plurality of rows of corrugated grooves are formed by rolling on the surface of the steel sheet for joining, and the joining surface of the steel sheet for high-strength bolt friction welding. It is a processing method.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As described above, a plurality of rows of corrugated grooves formed on the surface of a joining steel sheet by rolling are shown in FIG.
As shown in FIG. 1, a plurality of rows of corrugated grooves 2 capable of forming a desired slip coefficient in the circumferential direction of the roller 1 are formed in the width direction of the roller 1 to form a rolling roller 1. As described later, a plurality of rows of corrugated grooves are formed on the joining surface of the joining steel sheet by using such a rolling roller 1.

As shown in FIG. 3, a plurality of rows of corrugated grooves formed on the surface of the joining steel sheet by rolling are formed such that the depth of the concave portion of the rolling roller 1 groove 2 is greater than the height of the convex portion. The concave portion 5 of the steel plate 3 for joining is formed by pressing the convex portion of the groove 2 of the rolling roller 1, and the steel material extruded by forming the concave portion 5 enters the adjacent convex portion 6 and the convex portion 6.
The height can be higher than the depth of the concave portion 5 and can be higher than the surface of the joining steel plate 3. As described above, when the convex portion 6 is formed higher than the surface of the joining steel plate 3,
The steel plate 3 for joining is brought into contact with the steel material to be joined with a high-strength bolt and tightened, so that the corrugated groove 4
However, even if there is no portion, the protrusions 6 of the plurality of rows of corrugated grooves 4 are cut into the surface of the steel material to be joined, so that the slip coefficient can be increased and the joining strength can be secured. That is, as shown in FIG. 4, when a plurality of rows of corrugated grooves 4 are formed by cutting, the height of the convex portions 6 becomes the same as the surface of the joining steel sheet 3, so that a plurality of rows of If there is a portion where the corrugated groove is not formed, the convex portion 6 of the groove 4 cannot bite into the surface of the joining steel material, and a predetermined slip coefficient cannot be obtained.

As described above, since the projections of the corrugated grooves in a plurality of rows formed on the surface of the steel sheet for joining can be formed high, the penetration of the projections into the joining steel material can be deepened, and the slip coefficient can be dramatically increased. Can be improved. Therefore, when joining by tightening the high-strength bolts, the number of high-strength bolts can be reduced, and the work efficiency of joining steel materials can be greatly improved. When the convex part forms a multi-row corrugated groove with the same height as the surface of the joining steel sheet, it is formed on the entire surface of the joining steel sheet so that the convex part bites into the joining steel material to secure the slip coefficient. It is.

Next, an example of a plurality of rows of corrugated grooves formed on the surface of the steel sheet for joining by the method of the present invention will be described. As shown in FIG. 5, a plurality of rows of corrugated grooves 4 are formed in the width direction of the surface of the joining steel plate 3. Further, as shown in FIG. 6, an unformed portion of the corrugated groove is formed at the center in the width direction of the surface of the joining steel plate 3, and a plurality of rows of corrugated grooves 4 are formed on both sides thereof.

[0009]

Next, examples of the method of the present invention will be described. In FIG. 1, a stage 11 is movably provided on a base 8 via a stage feed screw 9 by driving a geared motor 10, and a plurality of rows of waveforms in the roller width direction are provided on a frame 12 of the base 8. The rolling roller 1 in which a groove is formed is provided at the tip of the lifting screw 13, and the rolling roller 1 is provided to be able to move up and down via the lifting screw 13 by driving the geared motor 10 a. After fixing the joining steel plate 3 on the stage 11 by the clamp 14, the rolling roller 1 is brought into contact with the front end of the joining steel plate 3 in the moving direction, and then the geared motor 10 is driven to turn the stage feed screw 9. After rotating, the stage 11 is moved to form a plurality of rows of corrugated grooves on the surface of the joining steel plate 3.

Further, the frame 12 as described above is movable, and the stage 11 is fixed, and a plurality of rows of corrugated grooves can be formed on the surface of the joining steel plate 3 fixed by the movement of the rolling roller 1. Further, when a plurality of rows of corrugated grooves are formed on the surface of the wide joining steel sheet 3, a plurality of rolling rollers 1 are disposed in the width direction to accurately form a plurality of rows of corrugated grooves on the surface of the joining steel sheet 3. Can be formed.

Next, an example of steel material joining by the joining steel sheet manufactured by the method of the present invention will be described. 1) Manufacture of steel sheet for joining (1) Rolling roller: roller diameter = 25 mm, width = 3
5 mm, protrusion pitch = 1.0 mm, convex portion apex angle = 90 °,
Tip of convex part and concave part R = 0.06 mm. (2) Rolling conditions: processing speed (steel sheet moving speed) = 2 m /
Min, rolling depth (recess) setting = 0.1m for the first and second times
m, the third operation (repeated movement) of 0.025 mm for the third time, the steel plate for joining (material S45C) is moved in the length direction of 35 mm, and a plurality of rows of corrugated grooves are formed on the entire surface by rolling, thereby forming convex and concave portions. Height difference of 0.45 mm, convex vertex angle = 90 °, convex tip and concave portion R = 0.06 mm, convex interval 1.0 mm, and heat treatment. The hardness of the joined steel material) was 3.5. 2) Joining steel material As shown in FIG. 7, the joining steel material 15 is H900 × 300.
× 16 (web thickness) × 28 (flange thickness), material S
M490 (harder than steel plate for joining). The contact surface of the joining steel plate 3 with the joining steel plate 3 is subjected to rust removal treatment by shot blasting to make Rz (DIN) = 50 μm. A high-strength bolt (F10TM22) was inserted into the hole 7 and tightened, and a force was applied in the longitudinal direction of the joining steel material 15 to join with a slip coefficient of 0.9 and a required number of bolts of 36.

[0012]

According to the method of the present invention, a plurality of rows of corrugated grooves can be manufactured (processed) accurately on the surface of the joining steel sheet while maintaining high productivity. Further, the length of the convex portion of the multi-row corrugated groove can be formed longer than that of the concave portion, and the slip coefficient can be improved. Further, there is no decrease in the yield after the machining of the multi-row corrugated grooves, and the manufacturing can be performed at low cost. Furthermore, an excellent effect is obtained in that operations such as removal of cutting waste can be omitted and labor can be saved, as compared with cutting.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the method of the present invention.

FIG. 2 is a front view of a rolling roller.

FIG. 3 is an enlarged cross-sectional view of a plurality of rows of corrugated grooves formed by rolling rollers.

FIG. 4 is an enlarged cross-sectional view of a multi-row corrugated groove formed by cutting.

FIG. 5 is a plan view of a joining steel sheet having a plurality of rows of corrugated grooves formed by the method of the present invention.

FIG. 6 is a plan view of a joining steel sheet having a plurality of rows of corrugated grooves formed by the method of the present invention.

7A and 7B are a side view and a plan view showing a joining structure of the joining steel material.

Claims (4)

[Claims] 1. A method for processing a joint surface of a steel plate for high-strength bolt friction joining, wherein a plurality of rows of corrugated grooves are formed by rolling on the surface of the joint steel plate. 2. The method for processing a joint surface of a steel plate for high-strength bolt friction joining according to claim 1, wherein the joining steel plate is fixed, and a rolling roller is moved in contact with the joining steel plate. 3. The rolling roller is fixed, and a joining steel plate is moved in contact with the rolling roller.
The method for processing a joint surface of a steel plate for high-strength bolt friction joining according to the above. 4. The steel plate for high strength bolt friction welding according to claim 1, wherein the height of the convex portions of the multi-row corrugated grooves is formed higher than the surface of the steel plate for welding. Surface processing method.