1. A method for producing a switch fork with a fork transporter by a low-distortion welded connection comprising the steps of:
providing a receiver block having an outer shape;
placing a switch fork on the receiver block wherein the shift fork has an inner shape corresponding to the outer shape of the receiver block wherein a height from a top surface of the receiver block to a top surface of the switch fork is h1;
providing a bearing block of height h1;
locating a fork transporter on the bearing block and the top surface of the switch fork;
spot welding the switch fork and fork transporter to each other simultaneously while applying a pressure force to a top surface of the fork transporter at at least two spatially different locations to define joining spots so that the switch fork and fork transporter are prefixed at the joining spots; and
thereafter simultaneously producing welding seams at the joining spots.
2. A process according to claim 1, wherein the simultaneous welding processes are carried out by a process of laser welding or electron welding.
3. A process according to claim 2, wherein the simultaneous welding processes are carried out by metal-inert-gas (MIG) welding.
4. A process according to claim 2, wherein the welding processes carried out is one of laser and MPG tandem-welding.
5. A process according to claim 1, wherein the process of simultaneous welding of the components is carried out at joining spots lying opposite to each other.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method of boring a hole in a mold, comprising:
preparing a mold boring apparatus including a mold boring tool having a flow passage that is formed inside of the mold boring tool and allows a fluid to flow therethrough, a plurality of slits and a plurality of protruding portions that are formed on an outer peripheral portion of an outer body of a tool blade member of the mold boring tool in a circumferential direction thereof so as to extend from a leading end to a base end of the tool blade member, and a plurality of blades that are inclined inward and are respectively formed at leading ends of the protruding portions formed between the adjacent slits;
fitting the tool blade member to a leading end of a support pipe provided for a mount plate of the mold boring apparatus so as to support the tool blade member;
introducing the fluid from the support pipe into the flow passage of the tool blade member of the mold boring tool when the mold boring tool is moved in an axial direction thereof to be stuck into sand of the mold; and
boring the hole in the mold while the blades of the mold boring tool act to collapse the sand of the mold to an inner side of the tool blade member of the boring tool, and the sand collapsed by the blades is discharged to an outside of the mold through the slits by an action of the fluid flowing from the flow passage into the slits.
2. The method of boring a hole in a mold according to claim 1, wherein the hole of the mold is a degassing hole.
3. A mold boring tool, comprising:
a mount plate that is connected to a body of a mold boring apparatus;
a plurality of support pipes provided for the mount plate so as to extend downward; and
a plurality of tool blade members mounted to leading end portions of the support pipes, respectively,
each of the tool blade members comprising:
a body;
a flow passage formed inside the body to flow a fluid from an outside into an inside of the body;
a plurality of slits formed on an outer peripheral portion of the body so as to extend, in a circumferential direction thereof, from a leading end to a base end of the tool blade member;
a plurality of protruding portions formed between the adjacent slits so as to be inclined inward the tool body; and
a plurality of blades formed at leading ends of the protruding portions, respectively,
wherein the boring tool is moved downward in an axial direction thereof toward a mold, the blades act to collapse sand of the mold to an inner side of the tool blade member of the mold boring tool, and the slits allow the sand collapsed by the blades to be discharged to an outside of the mold by an action of the fluid flowing from the support pipes and then the flow passage into the slits.
4. The mold boring tool according to claim 3, wherein the protruding portions are formed so as to be each inclined by a predetermined angle with respect to the axial direction of the mold boring tool, and the protruding portions have side surfaces defining the slits, the side surfaces functioning as blades that collapse the sand of the mold to inner sides of the slits.
5. The mold boring tool according to claim 3, wherein the protruding portions have side surfaces defining the slits, the side surfaces being formed so as to be each inclined from a side edge of a leading end surface of the protruding portion to a base portion of the protruding portion.
6. The mold boring tool according to claim 3, wherein the fluid is air.
7. The mold boring tool according to claim 3, wherein the hole of the mold is a degassing hole.
8. A mold boring apparatus, comprising:
a molding board on which a mold is placed;
an elevating unit disposed above the molding board to be vertically movable;
a mold boring tool provided for the elevating unit to be vertically movable; and
a fluid supply source that supplies a fluid to the mold boring tool, the mold boring tool having a structure according to claim 3.