JP2010227967A - Friction building-up method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a friction building-up method which continuously performs building-up work in bulk while suppressing the excessive protrusion of a building-up member thereby suppressing the deflection of the building-up member. <P>SOLUTION: In the friction building-up method, the outer circumferential face of the building-up member b with an almost columnar shape is gripped by a gripping means 21, and while rotating the gripping means 21 around the axis of the building-up member b, one axial-direction edge of the building-up member b is pressed against the surface of a base material W and the building-up member b is softened by frictional heat, thus, building-up work is performed onto the base material W. The building-up work is performed in such a manner that the dimensions L of the building-up member b protruded from the gripping means 21 are controlled to a prescribed range while intermittently extruding the building-up member b. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a friction build-up method in which build-up welding of a build-up member is performed on the surface of a base material, and in particular, the dimension of the build-up member protruding from the gripping means of the friction build-up device is in a predetermined dimension range. Further, the present invention relates to a material that performs overlaying while extruding the overlaying member intermittently.

  2. Description of the Related Art Conventionally, in a friction build-up method in which a build-up member is built on the surface of a base material using a friction build-up device, for example, the end of a substantially cylindrical build-up member is gripped by gripping means such as a chuck. Then, while rotating the gripping means around the axis of the build-up member, one end of the build-up member in the axial direction is pressed against the surface of the base material, and the build-up member is softened by frictional heat to build up the build-up on the base material. Processing was performed (see, for example, paragraph numbers [0032] and [0049] of Patent Document 1, reference numeral 7 in FIG. 2, reference numeral 14 in FIG. 3).

  In recent years, friction stir welding (see, for example, Non-Patent Document 1) is applied to light metal bonding and attracts attention, but for applications of high melting point materials such as steel, a friction stir welding tool is used. There is a problem of the heat resistance of the rotary tool called, and many materials are being developed. If the friction build-up method can be applied to high-melting-point materials, a build-up material with equivalent or similar characteristics to the members to be joined is used as a rotary tool, and this material is consumed and built up. There is no need to do.

JP 2001-62564 A

“What is Friction Stirring Technology (FSW)?” [Accessed February 23, 2009], Internet URL <http: // www. m-osaka. com / fswproject / fsw / index. html>

  However, in the friction build-up method as described above, the end position of the build-up member is always held and fixed to the chuck (gripping means) of the friction build-up device. It simply presses the embedding member unilaterally in the direction of the base material, and if the protruding dimension from the gripping means of the build-up member is short, the bending of the build-up member is suppressed and a large pressing force is applied to quickly build the meat. Although overlaying is possible, the build-up member is used up quickly due to the short projecting dimension, and it is necessary to frequently replace the build-up member. In addition, it is difficult to replace the build-up member. Since the operation is temporarily interrupted, the formed built-up portion becomes discontinuous, and the bonding strength with the base material is lowered or a step is generated.

  On the other hand, if the protruding dimension of the built-up member is increased, the built-up member will perform a repulsive motion due to the centrifugal force caused by the rotation, and not only cannot generate sufficient frictional heat, There was a problem that the member was broken at the tip of the gripping part and could not be built up.

  The present invention has been made to solve the above-described problems.

  In the invention according to claim 1, the outer peripheral surface of the substantially cylindrical build-up member is gripped by the gripping means, and one end in the axial direction of the build-up member is rotated while rotating the gripping means around the axis of the build-up member. Is a friction build-up method in which the build-up member is softened by frictional heat to soften the build-up member, and the build-up member protrudes from the gripping means. This is a friction build-up method in which build-up processing is performed while intermittently extruding the build-up member so as to be within a predetermined range.

  In the invention according to claim 2, the outer peripheral surface of the first build-up member having a substantially cylindrical shape is gripped by the gripping means, and the first means is rotated while rotating the gripping means around the axis of the first build-up member. A friction overlaying method in which one end in the axial direction of the overlaying member is pressed against the surface of the base material, and the first overlaying member is softened by frictional heat to perform overlay processing on the base material, Overlaying is performed while intermittently extruding the first buildup member so that the dimension of the first buildup member protruding from the gripping means is within a predetermined range, One end in the axial direction of the substantially cylindrical second build-up member having the same outer diameter as the first build-up member is formed on the other end opposite to the one end pressed against the base material surface, This is a friction build-up method in which the first build-up member and the second build-up member are added together while being sequentially connected so that the axial centers of the second build-up member coincide.

  The invention according to claim 3 is the friction build-up method according to claim 2, wherein the first build-up member and the second build-up member are pressed against the surface of the base material of the first build-up member. A first screw formed along the axial direction of the first build-up member and a portion connected to the first build-up member of the second build-up member at the other end opposite to the one end In the above, the second build-up member is screwed together with a second screw formed along the axial direction.

  The invention according to claim 4 is the friction build-up method according to claim 3, wherein the first screw and the second screw are screwed together with the rotational speed of the first build-up member and the second build-up member. This is performed in a state where the rotational speed of the is different.

  According to the friction build-up method according to claim 1, in order to perform build-up processing while extruding the build-up member intermittently so that the dimension of the build-up member protruding from the gripping means is within a predetermined range, While suppressing excessive protrusion of the build-up member and suppressing bending of the build-up member, a large amount of build-up processing can be performed continuously, for example, a steelmaking rolling roll, a papermaking roll, etc. Processing into a cylindrical object can be performed.

  According to the friction building-up method according to claim 2, the same outer diameter as that of the first building-up member is provided at the other end opposite to the one end pressed against the surface of the base material of the first building-up member. One end of the substantially cylindrical second build-up member in the axial direction is added while sequentially connecting so that the axial centers of the first build-up member and the second build-up member coincide with each other. Therefore, a seam is prevented from being formed between the build-up portion by the first build-up member and the build-up portion by the second build-up member, and both the build-up portions become discontinuous and are joined to the base material. It is possible to suppress the strength from being lowered or to generate a step, and to perform the overlaying process quickly and continuously because there is no replacement of the overlay member.

  According to the invention described in claim 3, in addition to the effect of the friction building-up method according to claim 2, the connection between the first building-up member and the second building-up member is the first building-up member. A first screw formed along the axial direction of the first build-up member at the other end opposite to the one end pressed against the surface of the base material, and the first build-up of the second build-up member Since it is performed by screwing with the second screw formed along the axial direction of the second build-up member in the portion to be connected to the build-up member, it is possible to reliably connect the build-up members with each other by a simple method. In addition, when connecting, it is possible to prevent alteration due to oxidation or the like of the surface of the first and second build-up members as much as heat is not applied to the connection portion of each build-up member. It is possible to prevent a decrease in bonding strength between the base material and the base material.

  According to the invention described in claim 4, in addition to the effect of the friction building-up method according to claim 3, the screwing of the first screw and the second screw is based on the rotational speed of the first building-up member. Since it is performed in a state in which the rotation speed of the second build-up member is different, the first build-up member can be rotated without stopping the rotation of the first build-up member even during the build-up process of the first build-up member. The first build-up member and the second build-up member can be easily and quickly connected.

It is the schematic front view which showed an example of the friction buildup apparatus for enforcing the friction buildup method which concerns on this invention. It is the schematic side view which abbreviate | omitted and showed one part of FIG. FIG. 2 is a schematic plan view of FIG. 1. 4A and 4B are schematic views of the spindle shown in FIG. 1, in which FIG. 4A shows a longitudinal sectional view and FIG. 4B shows a bottom view. It is the schematic which expanded and showed the principal part of the friction buildup apparatus for demonstrating the 1st Example of the friction buildup method of this invention, Fig.5 (a) is the side view before buildup processing. 5 (b) is a side view during the overlaying process, FIG. 5 (c) is a perspective view during the overlaying process, FIG. 5 (d) is a side view before pushing the overlaying member, and FIG. e) is a side view after pushing the build-up member. It is a schematic front view of the friction build-up apparatus for demonstrating the 2nd Example of the friction build-up method of this invention, and is a thing before performing build-up processing. FIG. 7 is a schematic front view during the overlaying process of FIG. 6. It is a schematic front view of the transfer initial stage of the 2nd build-up member of FIG. It is a schematic front view in the middle of the transfer of the 2nd build-up member of FIG. It is the schematic front view which showed the state which has connected the 1st buildup member and 2nd buildup member of FIG. It is the partially broken schematic front view which expanded and showed the K section (connection part) of FIG. It is a partially broken schematic front view showing a modification of FIG.

  First, a friction build-up device for carrying out the friction build-up method according to the present invention will be described with reference to FIGS. 1 to 4, A is a friction build-up device, and the friction build-up device A is a substantially cylindrical build-up member b (for example, a metal member such as high alloy material such as aluminum, steel, or stellite having a diameter of 25 mm). ) Is gripped by the gripping means 21, and one end in the axial direction of the build-up member b is pressed against the surface of the base material W while rotating the gripping means 21 around the axis of the build-up member b. Thus, the build-up member b is softened and the build-up process is performed on the base material W. The build-up member b is roughly constituted by the machine body 1, the spindle 2, the rotating means 23, and the lifting / lowering means 3.

  The spindle 2 is a member that presses against the surface of the base material W while gripping and rotating the build-up member b, and has a gripping means 21 for gripping the build-up member b. As shown in FIG. 4B, the gripping means 21 includes, for example, a plurality of clamp members 21b that are radially divided and arranged around clamp holes 21a (see FIG. 4B) through which the build-up member b is inserted. , 21b,... Are configured such that each of the clamp members 21b can be moved forward and backward in the radial direction of the build-up member b by, for example, hydraulic pressure or the like to grip the build-up member b.

  These clamp members 21b, 21b,... Are housed in a clamp case 21c and are rotatably supported by the spindle case 12 via bearings 13, 13,. A pulley 22 is integrally provided on the outer periphery of the portion, and the pulley 22 and the rotating means 23 are connected by a rotating belt 24 (see FIG. 3). The rotating means 23 is, for example, a high output spindle motor. The gripping means 21 may be any other known gripping means as long as the build-up member b can be fixed rotatably.

  In FIG. 1 to FIG. 3, reference numeral 3 denotes lifting means. The lifting means 3 moves the spindle 2 up and down in the machine body 1. Rails 30, 30 are arranged, and the spindle 2 is slidably attached to the rails 30, 30 via attachment members 31.

  A female screw body 32 is integrally attached to the mounting member 31, and the female screw body 32 is screwed to a ball screw 33 that is axially attached to the machine body 1, and the ball screw 33 is rotated. The spindle 2 (attachment member 31) is moved up and down by being moved. The ball screw 33 is connected to a lifting motor 36 that can be controlled to rotate via a pulley 34 and a rotating belt 35 of a speed reducer connected to the upper end of the ball screw 33. The lifting motor 36 is moved at a predetermined speed. By rotating, the raising / lowering speed of the spindle 2 and the pressing force of the build-up member b can be freely controlled.

  For example, as shown in FIGS. 2 and 3, a balance weight 37 is attached to the lifting / lowering means 3 so that the load applied to the ball screw 33 and the female screw body 32 can be reduced and the spindle 2 can be lifted / lowered smoothly. In this drawing, the balance weight 37 is provided on the back side of the machine body 1, and the balance weight 37 and the attachment member 31 are connected via pulleys 38, 38 provided on the upper part of the machine body 1. The wires 39 and 39 are connected and balanced.

  Here, the gripping means 21 and the lifting / lowering means 3 have been described as one set of mechanisms, but a plurality of gripping means 21 and the lifting / lowering means 3 may be provided. Thereby, the build-up processing can be performed without interruption, and the build-up portion n can be continuously formed.

  1 and 2, reference numeral 4 denotes a loader for supplying the build-up member b to the spindle 2. The loader 4 transfers the build-up member b from the build-up member supply means 6 described later and is mounted on the spindle 2. A transfer means 41 that detachably holds the build-up member b by the chuck 41a, a rail body 42 that slides the transfer means 41 in the horizontal direction, and an air cylinder 43 that raises and lowers the rail body 42. ing. For example, as shown in FIG. 3, the loader 4 can be provided with a balance weight 44 on the back side of the machine body 1 so that the rail body 42 can be moved up and down smoothly. And the rail body 42 may be coupled by a wire 46 via a pulley 45.

  1 and 3, reference numeral 6 denotes a build-up member supply means. The build-up member supply means 6 is pre-filled in each of the insertion holes 61 a, 61 a,. The build-up member b is inserted vertically and stored, and the build-up member b is pulled out one by one by the transfer means 41 and supplied to the spindle 2. The insertion member 61 is connected to a motor 62 provided below, and each time the build-up member b is pulled out, the new build-up member b is rotated while being sequentially rotated to the chuck position of the transfer means 41 (see FIG. 6). To the position within the build-up member supply means 6 indicated by the phantom line.

  1 and 2, 51 is a stage on which the base material W is placed on the upper surface side, and 52 is a motor for driving the stage 51, and is connected to the motor 52 by driving the motor 52. By rotating the ball screw 53, the stage 51 can be moved in the left-right direction as viewed from the front. Although not shown, this stage 51 can be driven by a motor in a front view, in the front-rear direction and / or in the up-down direction.

  Next, a friction build-up method performed using the friction build-up apparatus A configured as described above will be described with reference to FIGS. 5A and 5B are diagrams for explaining the build-up processing. FIG. 5A shows a state before the build-up processing, and FIGS. 5B and 5C show a state during the build-up processing.

As shown in FIG. 5 (b), the friction build-up process rotates the build-up member b (several tens to several thousand rpm) and presses the surface of the base material W (up to several tons / cm ² ). The build-up member b is softened by frictional heat between the build-up member b and the base material W, and the build-up process is performed on the surface of the base material W. As shown in FIG. The build-up portion n is formed while gradually moving, and in the build-up portion n other than the contact portion between the build-up member b and the base material W, the build-up material (the build-up member b) The material is cooled and solidified, and the build-up material and the base material W are integrated.

  And in the 1st Example concerning the friction build-up method of the present invention, dimension L (refer to Drawing 5 (b)) of build-up member b which protrudes from grasping means 21 is settled in a predetermined range. The overlaying process is performed while intermittently extruding the buildup member b. Specifically, when the dimension L becomes shorter than L1 due to the wear of the buildup member b (L <L1) (FIG. 5 ( d)), the clamping members 21b, 21b,... of the holding means 21 are loosened to temporarily release the build-up member b, and the spindle 2 is raised by the elevating means 3 so as to protrude from the holding means 21 When the dimension L of b becomes the predetermined dimension L2 (L = L2) (see FIG. 5 (e)), the clamp member 21b is tightened again to grip the build-up member b, and the lifting means 3 is gradually moved. Lower and resume overlaying.

  It should be noted that the above-described opening of the clamp member 21b to re-tightening is performed quickly, and during that time, the build-up processing is interrupted for a very short time, but the formation of the build-up portion n is not affected. .

  Next, a second embodiment according to the friction overlaying method of the present invention will be described with reference to FIGS. In addition, since it is the same as the 1st Example mentioned above in the extrusion method of the build-up member b (henceforth "the 1st build-up member b1") during build-up processing, the detailed description Is omitted.

  First, FIG. 6 shows a view before the first build-up member b1 is mounted on the spindle 2, and FIG. 7 shows a view in which build-up processing is performed by the first build-up member b1. During the embedding process, the first build-up member b1 is gradually shortened as the first build-up member b1 is pushed out.

  Then, as shown in FIG. 8, when the first build-up member b1 is shortened to some extent, the loader 4 is operated, the air cylinder 43 is lowered, and the build-up member supply unit 6 is moved by the chuck 41a of the transfer unit 41. One of the built-up members b stored in the container is grasped and pulled out (this built-up member b is hereinafter referred to as “second built-up member b2”). Here, the second build-up member b2 is a substantially columnar build-up member having the same outer diameter as the first build-up member b1. Then, after raising the air cylinder 43 (see arrow d1 in FIG. 8), the transfer means 41 is moved on the rail body 42 (see arrow d2 in FIG. 8), and the transfer means 41 comes directly above the spindle 2. The loader 4 is lowered (see arrow d3 in FIG. 9), and the second build-up member b2 gripped by the transfer means 41 is inserted into the clamp hole (see FIG. 4 (a)).

  And, the other end opposite to the one end pressed against the surface of the base material W of the first build-up member b1 is connected to one end in the axial direction of the second build-up member b2 and the first build-up member b1. This is repeated so that the axis of the second build-up member b2 coincides with the axis of the second build-up member b2, and this operation is repeated each time the first build-up member b1 is shortened. Try to add while connecting sequentially.

  By the way, in connection with the 1st build-up member b1 and the 2nd build-up member b2 which were mentioned above, specifically, FIG. 11 (a)-(d) which expanded the K section of FIG. ), The first screw formed along the axial direction of the first build-up member b1 at the other end opposite to the one end pressed against the surface of the base material W of the first build-up member b1. Threading of b1 ′ and the second screw b2 ′ formed along the axial direction of the second build-up member b2 at the portion connected to the first build-up member b1 of the second build-up member b2 Is done.

  That is, first, from the state where the first build-up member b1 and the second build-up member b2 are separated (see FIG. 11A), the second build-up member b2 is changed to the first build-up member b1. Pressing them together causes them to rotate in the same direction of rotation (see arrows r1 and r2 in FIG. 11B) (at this time, the chuck 41a is allowed to rotate). When the first build-up member b1 is instantaneously reversely rotated by reversing the rotating means 23, the second build-up member b2 rotates in the r2 direction due to inertia as shown in FIG. 11C. Although the first build-up member b1 rotates in the r1 ′ direction (the direction opposite to r2), the first screw b1 ′ and the second screw b2 ′ begin to be screwed and tightened. In this state, as shown in FIG. 11D, if the rotation of the first build-up member b1 is returned to the original direction (r1 direction), the first build-up member b1 and the second build-up member b2 And are connected.

  By the way, the screwing of the first screw b1 ′ and the second screw b2 ′ does not reversely rotate the first buildup member b1 as described above, but the rotational speed of the first buildup member b1. And the rotational speed of the second build-up member b2, for example, the rotational speed of the first build-up member b1 is instantaneously slowed, as shown in FIGS. 12 (a) to 12 (d). As described above, the second build-up member b2 may be rotated in a state where the rotation speed of the second build-up member b2 is instantaneously increased by a motor (not shown).

  According to this connection method, at the time of connection, since the heat is not applied to the connection part of each build-up member b1, b2, it is possible to prevent alteration due to oxidation of the surface of the first and second build-up members b1, b2. It is possible to prevent a decrease in the bonding strength between the build-up portion n and the base material W due to this alteration, and to perform the build-up processing quickly and continuously because there is no replacement of the build-up member b. it can.

A Friction build-up device 1 Machine body 2 Spindle 23 Rotating means 3 Lifting means 4 Loader

Claims (4)

Grasping the outer peripheral surface of the substantially cylindrical build-up member by the gripping means, and pressing one end in the axial direction of the build-up member against the surface of the base material while rotating the gripping means around the axis of the build-up member, A friction build-up method in which the build-up member is softened by frictional heat to perform build-up on the base material,
The friction build-up method, wherein the build-up process is performed while intermittently extruding the build-up member so that the dimension of the build-up member protruding from the gripping means is within a predetermined range. The outer peripheral surface of the substantially cylindrical first build-up member is gripped by the gripping means, and the gripping means is rotated around the axial center of the first build-up member while moving in the axial direction of the first build-up member. A friction build-up method in which one end is pressed against the surface of the base material, and the first build-up member is softened by frictional heat to perform overlay processing on the base material,
Overlaying is performed while intermittently extruding the first buildup member so that the dimension of the first buildup member protruding from the gripping means is within a predetermined range,
A substantially columnar second build-up member having the same outer diameter as that of the first build-up member at the other end opposite to the one end pressed against the surface of the base material of the first build-up member. A friction build-up method characterized in that one end of each of the first and the second build-up members is added while being sequentially connected so that the axial centers of the first and second build-up members coincide.   The first build-up member and the second build-up member are connected at the other end opposite to one end pressed against the surface of the base material of the first build-up member. A first screw formed along a direction and a second screw formed along the axial direction of the second build-up member at a portion connected to the first build-up member of the second build-up member. The friction build-up method according to claim 2, wherein the friction build-up method is performed by screwing with a screw.   The screwing of the first screw and the second screw is performed in a state in which the rotation speed of the first build-up member is different from the rotation speed of the second build-up member. The friction build-up method described.

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