JP5511871B2 - Weld bead grinding equipment - Google Patents

Description

  The present invention is a welding bead grinding apparatus, particularly for grinding a weld bead in butt welding, in which the surplus formed on the lower surface of the structure (for example, the lower surface of the bottom plate of a ship) is in an upward posture. The present invention relates to a weld bead grinding apparatus for grinding.

  Conventionally, the grinding of the weld bead in butt welding has been performed manually by using a hand grinder or a belt sander. At this time, it is difficult to align the scraping amount, that is, the height of the weld bead after grinding, and it may be excessively sharpened.Therefore, in order to cope with this, an adjuster for adjusting the scraping amount and A portable bead cutter tool provided with a handle orthogonal to the cutter axis on the opposite side of the cutter axis is disclosed (for example, see Patent Document 1).

JP 2001-259916 A (page 2-3, FIG. 1)

  In the invention disclosed in Patent Document 1, the amount of scraping is adjusted by an adjuster, so that the height of the weld bead after grinding can be made uniform without being excessively shaved, but the downward work can be performed. Since it is a premise, there was a problem that the surplus formed on the lower surface of the structure (for example, the lower surface of the bottom plate of the ship) could not be ground in an upward posture.

  The present invention solves such a problem, and an object of the present invention is to provide a weld bead grinding apparatus that can grind the surplus formed on the lower surface of the structure in an upward posture with a simple structure. .

(1) A welding bead grinding apparatus according to the present invention includes a traveling carriage, an elevating board installed on the running carriage so as to freely move up and down, a belton scouring part installed on the elevating board so as to be tiltable, and a belton scouring part. A tilt mechanism having a lever handle that tilts,
The Belton blasting unit is rotated at the other end of the grinding frame, a grinding motor installed at one end of the grinding frame, a drive wheel fixed to the rotating shaft of the grinding motor, and the grinding frame. A freely installed driven wheel; a polishing belt wound around the drive wheel and the driven wheel; and a tilting shaft formed between the drive wheel and the driven wheel of the grinding frame. And
The tilting shaft is rotatably supported in a belt-on support portion installed on the lifting substrate,
A handle shaft is provided at an intermediate portion of the lever handle, a handle support portion for rotatably supporting the handle shaft is provided on the elevating substrate, and the grinding is performed at a connection portion formed at one end of the lever handle. Connected between the tilt axis of the frame and the driven wheel ;
When the other end portion of the lever handle is lowered, the lever handle is rotated about the handle shaft and the one end portion of the lever handle is raised so that the grinding frame moves the tilt shaft. When the other end of the lever handle is raised by tilting about the center and the driven wheel side is raised, the lever handle is rotated about the handle shaft to rotate one of the lever handles. When the end portion is lowered, the grinding frame is tilted about the tilt axis, and the driven wheel side is lowered.

(2) In the above (1), biasing means for biasing the driven wheel side downward to suppress tilting toward the grinding motor side is provided between the grinding frame and the elevating substrate. It is characterized by that.

( 3 ) In the above ( 1) or (2) , a grip portion is provided at the other end of the lever handle, and the distance between the grip portion and the handle shaft is the distance between the handle shaft and the connection portion. It is characterized by being larger than.

  According to the weld bead grinding apparatus of the present invention, the following effects can be obtained.

  (I) Since the belt-on cleaning part is tiltably supported on the lifting substrate, it is not necessary to lift the belt-on cleaning part manually, and the belt of the belt-on cleaning part is formed on the lower surface of the steel structure by a simple operation. Therefore, the surplus can be easily ground in an upward posture.

  (Ii) Moreover, since the grinding frame is tilted and the driven wheel side is raised or lowered simply by lowering or raising the other end of the lever handle, the abrasive belt can be attached to the steel structure only by operating the lever handle. Since it can be pressed against the surplus of the weld bead formed on the lower surface and the pressing state can be visually confirmed, the surplus can be ground easily and accurately in the upward posture.

  (Iii) Furthermore, the grinding frame is urged by the urging means in the direction in which the driven wheel is lowered, and the urging means functions as a spring for compensating for its own weight. Because it requires only the force required to move and the force required to move the traveling carriage (because it is not necessary to apply extra force to maintain the attitude of the belt-on sharpening section), welding The work of grinding the extra bead is light.

  (Iv) Furthermore, since the force acting on the grip portion of the lever handle is reduced by the leverage effect (principle principle), the work of grinding the weld bead is further lightened.

The perspective view explaining the weld bead grinding device concerning Embodiment 1 of the present invention. The side view of the weld bead grinding apparatus shown in FIG. The front view of the weld bead grinding apparatus shown in FIG. The rear view of the weld bead grinding apparatus shown in FIG. The top view of the weld bead grinding apparatus shown in FIG. The flowchart which shows the operating method of the weld bead grinding apparatus shown in FIG. The side view of the weld bead grinding apparatus which concerns on Embodiment 2 of this invention. The front view of the weld bead grinding apparatus shown in FIG.

[Embodiment 1]
1 to 6 illustrate a weld bead grinding apparatus according to Embodiment 1 of the present invention. FIG. 1 is a perspective view, FIG. 2 is a side view, FIG. 3 is a front view, and FIG. 5 is a plan view, and FIG. 6 is a flowchart showing an operation method. Each drawing is schematically drawn, and the present invention is not limited to such a form.

  (Weld bead grinding machine)

  1 to 5, a weld bead grinding apparatus 100 is tiltable to a traveling carriage 10, an elevating mechanism 20 installed on the traveling carriage 10, an elevating board 30 installed on the elevating mechanism 20, and the elevating board 30. The beltton cleaning unit 40 is installed, and the tilting mechanism 50 includes a lever handle 51 that tilts the belton cleaning unit 40.

(Travel cart)
In the traveling carriage 10, large wheels 12 and casters 13 are installed on the back surface of the carriage substrate 11, and a lower end portion of the lifting mechanism 20 is installed.

  Therefore, the steel structure 90 to be ground on the surplus of the welding beat can be placed and moved freely on the floor surface (hereinafter collectively referred to as “the surface plate”) 98. A predetermined distance can be moved as the grinding progresses. In addition, although the above shows the push-type traveling carriage 10, the present invention is not limited to this, and a rotational drive device may be installed on the wheel 12 to make it self-propelled.

(Elevating mechanism)
The lifting device 20 includes a link mechanism (pantograph) 21 and a link upper plate 22 installed at the upper end of the link mechanism 21, and the link upper plate 22 is lifted and lowered while maintaining a posture parallel to the carriage substrate 11. . The link mechanism 21 is expanded and contracted by a hydraulic device (not shown) mounted on the traveling carriage 10. The present invention is not limited to the hydraulic device, and the screw shaft may be rotated by a motor or manually.

(Elevating board)
The elevating board 30 is installed on the link upper plate 22 and is provided with a belt support part 34 for tiltably supporting the belt cleaning unit 40 and a handle support part 35 for tiltingly supporting the lever handle 51 of the tilt mechanism 50. It has been.

(Belton Research Department)
The Belton polishing unit 40 includes a grinding frame 41, a grinding motor 42 installed at one end of the grinding frame 41, a drive wheel 43 fixed to the rotating shaft of the grinding motor 42, and the other end of the grinding frame 41. A driven wheel 44 that is rotatably installed in the section, a polishing belt 45 wound around the drive wheel 43 and the driven wheel 44, a belt cover 46 that faces the polishing belt 45 with a predetermined gap therebetween, and a grinding frame And a tilting shaft 47 formed on 41.

(Tilt mechanism)
The tilting mechanism 50 is installed on the elevating substrate 30, and a belt-on support part 34 that rotatably supports the tilting shaft 47 of the belt-on cleaning part 40 and a grinding part of the belt-on cleaning part 40 at a connection part 52 formed at one end. A lever handle 51 connected to the frame 41, a handle support portion 35 that is installed on the elevating board 30 and rotatably supports a handle shaft 53 formed on the lever handle 51, and is provided at the other end of the lever handle 51. The grip part 54 is provided.

  Further, since the grinding motor 42 side is heavy with respect to the tilting shaft 47, the Berton polishing unit 40 tilts so that the driven wheel 44 side is lifted as it is. For this reason, the driven wheel 44 side is urged downward with respect to the tilting shaft 47 to suppress tilting to one side (to repair its own weight), so that it is pulled across the grinding frame 41 and the lifting substrate 30. Means (spring etc.) 33 are provided.

  Therefore, when the operator pushes the grip portion 54 downward, the lever handle 51 rotates about the handle shaft 53 (same as the handle support portion 35), and the connection portion 52 rises. If it does so, the Berton sharpening part 40 will tilt about the tilting shaft 47 (same as the Belton support part 34), and the driven wheel 44 side will raise.

  That is, the polishing belt 45 can be pressed against the lower surface 99 of the steel structure 90 by the operator pressing the grip portion 54 downward. Conversely, when the operator lifts the grip 54 upward, the polishing belt 45 can be pulled away from the lower surface 99 of the steel structure 90.

  Then, when the operator pushes the grip part 54 toward the weld bead grinding apparatus 100, the weld bead grinding apparatus 100 advances, and conversely, when the operator pulls the grip part 54 back toward the front, the weld bead grinding apparatus 100. Will retreat.

(Method of operation)
Hereinafter, an operation method of the weld bead grinding apparatus 100 and an operation state associated with the operation will be described with reference to FIG. The operation method is roughly classified into “step 1 for positioning the weld bead grinding device 100”, “step 2 for grinding the surplus of the weld bead”, and “step 3 for retracting the grinding device”.

(Welding bead grinding machine positioning process 1)
Since the welding bead grinding apparatus 100 is based on the traveling carriage 10 with the large wheels 12 and the casters 13, the welding bead grinding apparatus 100 can travel (move) freely on the surface plate 98. For this reason, the weld bead grinding apparatus 100 is disposed immediately below the position where the weld bead is to be ground (S1-1).

  Then, the elevating mechanism 20 is extended, and the elevating substrate 30 is raised roughly until the polishing belt 45 comes close to the lower surface 99 (2 in S1).

(Surface grinding process 2 for weld beads)
After positioning of the weld bead grinding apparatus 100, extra grinding of the weld bead is started.

  First, the grinding motor 42 is activated to rotate the polishing belt 45 (S2-1). That is, preparations are made to cut off the excess weld bead.

  Thereafter, the operator presses down the grip portion 54 of the lever handle 51 and presses the polishing belt 45 against the surplus of the weld bead to grind the surplus, while the weld bead grinding apparatus 100 (same as the abrasive belt 45). Is moved forward or backward (2 in S2).

  At this time, the rotation direction of the polishing belt 45 is set so that sparks generated by polishing fly in the opposite direction of the operator (in FIG. 2, the driven wheel 44 rotates clockwise).

  Therefore, the operator can perform grinding of the surplus while easily confirming the degree of shaving (reduction) of the surplus of the weld bead with a force that only operates the lever handle 51 (grip part 54). Therefore, workability is improved. The extra grinding may be in the direction in which the weld bead grinding apparatus 100 is pushed out, or in the direction in which it is pulled back.

(Grinding device retracting step 3)
When the grinding of the target weld bead is completed, the operator lifts the lever handle 51 (grip 54) and pulls the polishing belt 45 away from the lower surface 99 of the steel structure 90 (S3-1).
Then, the lifting mechanism 20 is contracted (operating the hydraulic device, S3-2).
This is because the center of gravity of the weld bead grinding apparatus 100 is lowered and moved stably when moving to another position (position where there is a new weld bead to be ground) next.

(Function and effect)
Since the weld bead grinding apparatus 100 is as described above, the following operational effects can be obtained.
(I) Since it is not necessary to support the belt-on sharpening part 40 by hand, the surplus of the weld bead can be simply ground in an upward posture only by operating the lever handle 51, so that workability is improved.
(Ii) Since the work can be executed while confirming the surplus grinding state of the weld bead, the grinding accuracy is improved and the quality is improved.
(Iii) By using the elevating mechanism 20 for a high place (extending longer), it is possible to grind the surplus of the weld bead at a position higher than the height of the operator, and by lowering the elevating mechanism 20, the lower position Therefore, it is possible to grind the surplus of the weld bead.

[Embodiment 2]
7 and 8 illustrate a weld bead grinding apparatus according to Embodiment 2 of the present invention. FIG. 7 is a side view and FIG. 8 is a front view. In addition, the same code | symbol is attached | subjected to the part which is the same as that of Embodiment 1, or an equivalent part, and one part description is abbreviate | omitted. Each drawing is schematically drawn, and the present invention is not limited to such a form.

7 and 8, the weld bead grinding apparatus 200 corresponds to an apparatus in which a carriage handle 60 is installed on the traveling carriage 10 of the weld bead grinding apparatus 100.
That is, a pair of stand leg portions 61 are erected on the grip portion 54 side (left side in FIG. 7) of the lever handle 51 of the traveling carriage 10, and the ends of the stand leg portions 61 are connected by the stand arm portions 62. A carriage handle 60 is formed by the portion 61 and the stand arm portion 62.

Therefore, the operator operates the lever handle 51 for pressing the polishing belt 45 against the lower surface 99 and pulling it away from the lower surface 99, while moving the grinding position in the horizontal direction, that is, the traveling carriage 10. For movement, the carriage handle 60 can be operated (pushed or pulled back). For this reason, even when the surface plate 98 has irregularities and it is necessary to push out (or pull back) the traveling carriage 10 strongly, grinding can be performed without increasing the pressing of the polishing belt 45 against the lower surface 99. it can.
The form of the carriage handle 60 is not limited to that shown in the figure, and the stand leg 61 may be detachably installed on the carriage 10 or the lift base 30.

  According to the present invention, it can be widely used not only as a grinding device that simply grinds the build-up of weld beads of various steel structures in an upward posture but also as a polishing device that polishes the lower surface of a general structure.

DESCRIPTION OF SYMBOLS 10 Traveling carriage 11 Carriage board | substrate 12 Wheel 13 Caster 20 Lifting mechanism 21 Link mechanism 22 Link upper board 30 Lifting board 34 Belton support part 35 Handle support part 40 Belton cleaning part 41 Grinding frame 42 Grinding motor 43 Drive wheel 44 Drive wheel 45 Polishing belt 46 Belt cover 47 Tilt shaft 50 Tilt mechanism 51 Lever handle 52 Connection portion 53 Handle shaft 54 Grip portion 60 Bogie handle 61 Stand leg portion 62 Stand arm portion 90 Steel structure 98 Surface plate 99 Bottom surface 100 Weld bead grinding device (embodiment) 1)
200 Weld Bead Grinding Device (Embodiment 2)

Claims (3)

A traveling carriage; a lifting board installed on the traveling carriage so as to be movable up and down; a belton cleaning part installed on the lifting board so as to be tiltable; and a tilting mechanism including a lever handle that tilts the belton cleaning part. ,
The Belton blasting unit is rotated at the other end of the grinding frame, a grinding motor installed at one end of the grinding frame, a drive wheel fixed to the rotating shaft of the grinding motor, and the grinding frame. A freely installed driven wheel; a polishing belt wound around the drive wheel and the driven wheel; and a tilting shaft formed between the drive wheel and the driven wheel of the grinding frame. And
The tilting shaft is rotatably supported in a belt-on support portion installed on the lifting substrate,
A handle shaft is provided at an intermediate portion of the lever handle, a handle support portion for rotatably supporting the handle shaft is provided on the elevating substrate, and the grinding is performed at a connection portion formed at one end of the lever handle. Connected between the tilt axis of the frame and the driven wheel ;
When the other end portion of the lever handle is lowered, the lever handle is rotated about the handle shaft and the one end portion of the lever handle is raised so that the grinding frame moves the tilt shaft. When the other end of the lever handle is raised by tilting about the center and the driven wheel side is raised, the lever handle is rotated about the handle shaft to rotate one of the lever handles. The weld bead grinding apparatus according to claim 1, wherein when the end portion is lowered, the grinding frame is tilted about the tilting axis and the driven wheel side is lowered. 2. The biasing means for biasing the driven wheel side downward to suppress tilting toward the grinding motor side is provided between the grinding frame and the lifting substrate. Welding bead grinding equipment.   The grip portion is provided at the other end portion of the lever handle, and the distance between the grip portion and the handle shaft is larger than the distance between the handle shaft and the connection portion. The welding bead grinding apparatus as described.

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