JP3590957B2 - Bonding surface processing apparatus and method - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an apparatus and a method for processing a joint surface, for example, by superposing steel materials and fastening them with a tightening member such as a bolt or a rivet so as to enable a strong joint at a superposed surface.
[0002]
[Prior art]
At the construction site of structures such as buildings and bridges, in order to join large steel plates, one end surface of two steel plates is directly overlapped with each other, or the eyelets are stacked and tightened with bolts or rivets. A technique such as joining is used.
[0003]
[Problems to be solved by the invention]
If the frictional coefficient of the material used to join the steel sheets (hereinafter referred to as steel) to each other is small, the steel is temporarily or permanently tightened with bolts and rivets. Because the steel material is under its own weight, the steel materials may face each other in the direction in which the bolts are sheared, and as a result, the structure may not be assembled as designed.
[0004]
Conventionally, in order to solve this problem, a method is used in which steel materials are piled outdoors before assembly of the structure, thereby rusting the joint surfaces of the steel materials and increasing the friction coefficient between the joint surfaces. However, according to such a method, there has been a problem that the assembling work of the structure is further complicated.
[0005]
The present invention has been made in consideration of the above-described configuration, and is intended to propose a joining surface processing apparatus and method that can reliably increase the friction coefficient of the joining surface of a steel material by a simple method. is there.
[0006]
[Means for Solving the Problems]
In order to solve such a problem, in the present invention, a rolling blade 38C having a triangular cross section is formed concentrically on a conical inclined surface 38A around a joint hole 11 drilled or drilled in the steel material 2. By rolling the formed rolling die 36L (36R) with the conical inclined surface 38A pressed against the joint surface of the steel material 4, a friction-processed surface having a plurality of concentric irregularities around the joint hole 11 is formed. 45 is formed, whereby a plurality of concentric irregularities on the friction processing surface 45 can be rolled with high accuracy.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[0008]
(1) First Embodiment In FIGS. 1 and 2, reference numeral 1 denotes a bonding surface processing apparatus as a whole, and a steel material 2 conveyed by an automatic conveyance line of a processing plant is provided on an introduction table 3. The sheet is fed by a feed roller 5 and a driven roller 6 driven by an automatic line feed motor 4 to a work table 8 of a work table 7 along a guide member 3A in a carry-in direction indicated by an arrow a.
[0009]
The work table 7 is provided with positioning rollers 9 and 10 on the upstream and downstream sides of the work table 8, respectively, and as shown in FIG. 3, as shown in FIG. 3, a processing reference position PO1 of the steel material 2 (for example, a bolt hole 11 as a joint hole). The guide member 7A is used to position the steel material 2 at a position where the center position (the center position) matches the work reference position PO2 of the work table 8, and then the steel material 2 is processed by the tool 17 mounted on the main shaft 16 of the processing mechanism unit 15. Is done.
[0010]
The steel material 2 thus processed is carried out along the guide member 20A in the carrying-out direction indicated by the arrow b by the delivery roller 22 and the driven roller 23 driven by the motor 21 provided on the discharge table 20.
[0011]
The machining mechanism 15 is mounted on a position adjusting rail 25, so that the position of the tool 16 and the tool 17 in the x-direction can be adjusted as a whole in the loading / unloading direction of the steel material 2 (this is called the x-direction). And a position adjustment mechanism 26 for adjusting the position of the main shaft 16 in a direction orthogonal to the direction of loading and unloading of the steel material 2 (this direction is referred to as the y direction).
[0012]
Thus, when the steel material 2 to be subjected to the joint surface processing is positioned on the work table 8, the processing mechanism unit 15 adjusts the position of the tool 17 in the x direction and the y direction, thereby pre-piercing the tool 17 into the steel material 2. It is aligned with the center position of the bolt hole 11 provided.
[0013]
As shown in FIG. 4, the tool 17 has a tool main body 32 that extends a mount 31 for mounting the tool 17 to the main shaft 16 upward.
[0014]
A tool support member 33 having a U-shaped cross section is provided at a lower end portion of the tool main body 32, and a pair of support plate portions 33 </ b> A and 33 </ b> B extend downward facing each other at a position in the front-rear direction from the tip portion. A rolling die holder 34 is provided, and the rolling die holder 34 is attached to the front end portions of the support plate portions 33A and 33B so as to protrude inward in the front-rear direction and inwardly, respectively. Is supported so as to be rotatable in the direction indicated by arrow d.
[0015]
The tool support member 33 has a pair of rolling dies 36L and 36R so as to be symmetrical about the rotation center axis PO3 of the tool 17.
[0016]
The rolling dies 36L and 36R have the same structure as each other. As shown in FIG. 5A, a truncated conical die head 38 is integrally formed at the tip of a cylindrical rotary shaft 37.
[0017]
As shown in FIG. 5 (B), the conical inclined surface 38A of the die head 38 is formed with a rolling blade 38B having a triangular cross-sectional shape concentrically around the central axis PO4 along the conical inclined surface 38A. Have been. In the case of this embodiment, the rolled blade 38B is constituted by five stages of isosceles triangular blade portions 38C, and the apex angle α (FIG. 6A) of each of the blade portions 38C is 60 ° to 170 °. °.
[0018]
However, if the apex angle α is 60 ° to 170 °, the surface of the steel material 2 can be rolled with irregularities on the friction-processed surface having sufficient strength for practical use, whereas the apex angle α is set to 60 ° or less. Then, the strength of the unevenness decreases, and when the angle is 170 ° or more, the working action of the friction-processed surface becomes difficult.
[0019]
The transfer dies 36L (36R) are rotatably held by the thrust ball bearings 40A and the radial ball bearings 40B in the bearing housing members 40, respectively, when the bearing housing members 40 are mounted on the rolling die holders 34 by the mounting screws 41. The rolling dies 36L (36R) usually have the conical inclined surface 38A coincident with the reference plane FO orthogonal to the rotation center axis PO3, and the center line PO4 is inclined by the mounting angle θ with respect to the reference plane FO. In this state, it is held by the rolling die holder 34.
[0020]
During the rolling operation, a thrust force of, for example, several tons is applied to the thrust ball bearing 40A. The condition that the large thrust force is applied to the contact surface between the conical inclined surface 38A and the steel material 2 is determined as follows. Select θ as θ ≒ 40 °.
[0021]
In this state, the conical inclined surface 38A of the rolling die 36L (36R) is pressed against the surface of the steel material 2 as shown in FIG. When the tool 17 rotates in this state, the rolled blade 38B formed on the conical inclined surface 38A bites into the surface of the steel material 2, and as a result, the rolled blade 38A plastically processes the surface of the steel material 2. And concentric irregularities having the same shape as the surface shape of the rolling blade 38B and a triangular cross section are formed.
[0022]
In the above configuration, the steel material 2 is fed into the work table 7 from the introduction table 3 and the work material 2 is set at a position where the processing reference position PO1 of the bolt hole 11 serving as a joint hole matches the work reference position PO2 of the work table 8. Is positioned, the main shaft 16 of the machining mechanism 15 adjusts the position of the tool 17 in the x and y directions, so that the rotation center axis PO3 coincides with the machining reference position PO1 of the bolt hole 11.
[0023]
In this state, the processing mechanism unit 15 presses the rolling dies 36L (36R) of the tool 17 against the surface of the steel material 2 by rotating the main shaft 16 and lowering it by, for example, a hydraulic pump.
[0024]
At this time, the rolling die 36L (36R) is formed on the conical inclined surface 38A by being mounted on the rolling die holder 34 at the mounting angle θ symmetrically with respect to the rotation center axis PO3 of the tool 17. The lowermost point or a portion near the lowermost point of the formed rolling blade 38B rolls on the surface of the steel material 2 and cuts into the surface of the steel material 2 to perform the rolling process.
[0025]
As a result, irregularities (in the case of this embodiment, in the case of this embodiment, around the bolt hole 11 of the steel material 2 determined by the shape of the rolled blade 38B formed on the conical inclined surface 38A (in this embodiment, a triangular wave shape in cross section). As shown in FIGS. 6 (B) and 6 (C), a friction processing surface 45 having concentric triangular wave-shaped irregularities and having a groove 45B between a plurality of peaks 45A is formed.
[0026]
In this way, when the tool 17 makes one rotation about the rotation center axis PO3, the difference in “torsion” given to the friction processing surface 45 by the blade portions 38C inside and outside the rolling dies 36L (36R). Can be reduced, and concentric concavo-convex shapes of the friction processing surface 45 can be formed with uniform accuracy.
[0027]
For example, when it is attempted to form a plurality of blades 38C on the cylindrical surface of the cylindrical die head instead of the conical inclined surface 38A to form a plurality of concentric irregularities, inner and outer concentric circles are formed. Although the curvature radii of the concave and convex portions are different from each other, the concave and convex portions will be carved by the blade portion having the same radius of curvature, so that the `` twisting '' of the corresponding blade portion with respect to the inner concentric concave and convex and the outer concentric concave and convex. The difference increases.
[0028]
On the other hand, according to the above-described embodiment, by using the conical inclined surface 38A, the change in the radius of curvature of the blade portions arranged from the inside to the outside can be adapted to the change in the radius of curvature of the corresponding concentric unevenness. This can reduce the difference in “torsion” between the inner and outer blades.
[0029]
The depth of the unevenness of the friction processing surface 45 is increased by rotating the tool 17 a plurality of times (about 20 to 30 times) and repeating the rolling operation by the rolling blade 38B.
[0030]
Thus, when the friction processing surface 45 is formed around the bolt holes 11 of the steel material 2 by the rolling operation of the rolling dies 36L (36R), the processed steel material 2 is discharged to the outside by the discharge table 20.
[0031]
At the time of such a rolling operation, when the surface of the steel material 2 is inclined without matching the reference surface FO of the conical inclined surface 38A of the rolling die 36L (36R), the rolling die holder 34 of the steel material 2 The inclination of the conical inclined surface 38A is made to match the inclination of the surface of the steel material 2 by performing a rotation adjusting operation about the rotation support shaft 35A (35B) so as to follow the surface. As a result, the pressing force applied from the spindle 16 to the tool 17 is almost uniformly applied to each blade portion 38C of the rolling blade 38B, so that the friction processing surface 45 has substantially uniform unevenness over the entire surface. As a result, the friction processing surface 45 can be uniformly rolled.
[0032]
The steel material 2 having the friction processed surface 45 formed by the tool 17 in this manner is joined with a bolt, a rivet, or the like through the bolt hole 11 in a state where the friction processed surface 45 is brought into contact with the joint surface of the steel material to be joined. By being clamped by the member, the member is joined to the steel material to be joined while maintaining a large friction coefficient generated by the friction processing surface 45.
[0033]
At the time of this joining operation, as a steel material to be joined, a steel plate having a friction-processed surface similar to the friction-processed surface 45 or another friction-processed surface may be used as the joint surface, or the friction-processed surface may be used. A material that is not formed may be used.
[0034]
(2) Other Embodiments In the above description, a case has been described in which the friction processing surface 45 is formed on the steel material 2 in which the bolt holes 11 have been drilled in advance. For the steel material 2 on which the bolt holes 11 are not drilled, a friction processing surface is processed around a predetermined position where the bolt holes 11 are to be drilled, and then the bolt holes 11 are drilled or the friction processing surface 45 is processed. Even if the bolt holes 11 are formed at the same time, the same effect as in the above case can be obtained.
[0035]
In the above description, the case where a bolt is used as the joining member of the steel material 2 has been described. However, the joining member is not limited to this, and the present invention can be similarly applied to a case where another joining member such as a rivet is used. .
[0036]
Further, in the above case, the case where the mounting angle θ (FIG. 4) of the rolling dies 36L (36R) is set to θ = 40 ° is described as a preferable condition when the ball bearing is used. Is not limited to this, and θ = 0 ° to 45 ° may be used by using a thin-walled oilless metal or the like instead of the ball bearing.
[0037]
However, when the mounting angle θ is 40 °, the rolling process with little “twist” can be practically performed on the entire conical inclined surfaces 38A and 38B. On the other hand, when θ is close to 0 °, the “torsion” of the outer diameter portion tends to increase, and when θ is larger than 45 °, irregularities may be formed on the edge of the bolt hole 11 due to machining. There is a problem that can not be done.
[0038]
【The invention's effect】
As described above, according to the present invention, a plurality of concentric circles are formed around a joint hole of a steel material by using a rolling die formed concentrically, on a conical inclined surface, with a rolling blade having a triangular cross section. By forming a friction processed surface with unevenness, the processing of the joint surface that can form a uniform friction processed surface with a small difference in “torsion” with respect to the concentric unevenness of each part as the friction processed surface is realized it can.
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a joint surface processing apparatus according to the present invention.
FIG. 2 is a plan view of FIG.
FIG. 3 is a plan view showing a steel material 2 to be processed.
FIG. 4 is a front view showing a part of the tool 17 of FIG. 1 as a cross section.
5 (A) and 5 (B) are side views showing a detailed configuration of the rolling die 36L (36R) of FIG.
FIGS. 6 (A) to 6 (C) are schematic diagrams for explaining a processing operation by a rolling die 36L (36R).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Joining surface processing apparatus, 2 ... Steel material, 3 ... Introduction table, 5 ... Sending roller, 6 ... Driving roller, 7 ... Work table, 8 ... Work table, 9, 10 ... Positioning Roller, 11: Bolt hole, 15: Processing mechanism, 16: Spindle, 17: Tool, 20: Discharge stand, 22: Delivery roller, 23: Driven roller, 25: Position adjustment Rail, 26 Position adjusting mechanism, 31 Mounter, 32 Tool body, 33 Tool support member, 33A (33B) Support plate, 34 Rolling die holder, 35A (35B) ... Rotating support shaft, 36L (36R) ... Rolling die, 37 ... Rotating shaft, 38 ... Die head, 38A ... Conical inclined surface, 38B ... Rolling blade, 40A ... Thrust ball bearing , 40B ... radial ball bearing, 45 ... friction processed surface.

Claims (4)

A rolling die formed by forming a rolling blade having a triangular cross-sectional shape concentrically on a conical inclined surface around a joining hole formed or formed in a steel material, and forming the conical inclined surface on the steel material A method of forming a friction-processed surface having a plurality of concentric irregularities around the bonding hole by rolling in a state of being pressed against the bonding surface. Steel material feeding means for feeding and positioning the steel material to the work table,
On the conical inclined surface, concentrically, there is a rolling die formed by forming a rolling blade having a triangular cross section, and in a state where the conical inclined surface is pressed against the joining surface of the steel material, the rolling die is Processing mechanism means for forming a friction processing surface having a plurality of concentric irregularities around the joint hole by rolling around the joint hole formed or formed in the positioned steel material; When,
And a steel material sending means for sending the steel material having the friction processed surface formed thereon to the outside from the work table. On the conical inclined surface, there is a rolling die formed concentrically with a rolling blade having a triangular cross-sectional shape, and by rolling the conical inclined surface in a state of being pressed against the joining surface of the steel material , A machining tool characterized by forming a friction machining surface having a plurality of concentric irregularities around a hole. On a conical inclined surface, using a rolling die formed concentrically with a rolling blade having a triangular cross-sectional shape, the rolling die is rolled while the conical inclined surface is pressed against the joining surface. it allows the periphery of the contact Goana, steel, characterized in that the friction working surface having a plurality of concentric irregularities are formed.

Images