Flow control device
Provided is a fuel injection device that can secure strength capable of withstanding high fuel pressure. In a fuel injection device in which a fuel boundary includes two or more components, two components are press-fitted with an inner diameter and an outer diameter and are brought into contact at a butting surface, abutting welding is performed from a direction nearly parallel to the butting surface, an inner diameter side corner portion of the butting surface of a component to be fitted and press-fitted on an inner diameter side is chamfered longer in a direction perpendicular to the butting surface to increase a welding coupling length than a butting length, welding coupling length is less than welding depth, weld penetration depth is not less than material thickness, and the center of the weld is on a base material side, the outer diameter of which is larger than a joining face.
1. A flow control device including a first component having a first surface and a second component having an opposing second surface facing the first surface of the first component, comprising:
an abutment at which the first surface of the first component and the opposing second surface of the second component mutually contact each other; and
a weld portion formed along the abutment,
an air gap formed by the weld portion, the first component, and the second component,
wherein a welding direction tip end portion of the weld portion is positioned on a welding direction side with respect to the welding direction tip end portion of the abutment; and
wherein a central portion in a direction orthogonal to a welding direction of the weld portion is positioned on an abutting direction side with respect to the abutment.
2. The flow control device according to claim 1 , wherein
the welding direction tip end portion of the weld portion is positioned on a welding direction side with respect to a welding direction tip end portion of the air gap.
3. The flow control device according to claim 1 , comprising
a press-fitting portion that fixes the first component and the second component on a side surface of the second component, the side surface being substantially orthogonal to the opposing first surface with the first component, wherein
the air gap is formed on a press-fitting direction side with respect to the press-fitting portion of the second component and the first component.
4. The flow control device according to claim 1 , comprising
a press-fitting portion that fixes the first component and the second component on a side surface of the second component, the side surface being substantially orthogonal to the opposing surface with the first component, wherein
a chamfered portion formed in a direction away from the press-fitting portion toward a press-fitting direction is formed at an end portion in a press-fitting direction of the first component.
5. The flow control device according to claim 1 , comprising
a press-fitting portion that fixes the first component and the second component on a side surface of the second component, the side surface being substantially orthogonal to the opposing surface with the first component, wherein
a chamfered portion formed in a direction away from the press-fitting portion toward a press-fitting direction is formed at an end portion in a press-fitting direction of the first component, and
the chamfered portion is formed such that a length in a press-fitting direction is longer than a length in a direction orthogonal to the press-fitting direction.
6. The flow control device according to claim 1 , wherein
the air gap is formed such that a length in an abutting direction is longer than a length in a direction orthogonal to the abutting direction.
7. The flow control device according to claim 1 , wherein
an angle made by a tangent to be drawn to a portion forming the air gap out of the abutting weld portion, and a tangent to be drawn to a surface forming the air gap with the abutting weld portion of the first component is set to 45 degrees or more.
8. The flow control device according to claim 1 , comprising
a press-fitting portion that fixes the first component and the second component on a side surface of the second component, the side surface being substantially orthogonal to the opposing surface with the first component, wherein
a chamfered portion formed in a direction away from the press-fitting portion toward a press-fitting direction is formed at an end portion in a press-fitting direction of the first component, and the chamfered portion is formed such that a length in a press-fitting direction is longer than a length in a direction orthogonal to the press-fitting direction, and the angle formed by the press-fitting portion and the chamfered portion is 20 degrees or more and 40 degrees or less.
9. The flow control device according to claim 1 , comprising a valve body that opens and closes a flow path, wherein
the second component is a magnetic core that generates a magnetic attraction force, and
the first component is a fixing member to which the magnetic core is fixed while being butted in a moving direction of the valve body.
10. The flow control device according to claim 1 , wherein a length of the weld portion is greater than a length of the abutment.
11. The flow control device according to claim 1 , wherein a penetration depth associated with the weld portion is based on a press-fit depth associated with the press-fit portion.
12. The flow control device according to claim 11 , wherein the penetration depth is greater than the press-fit depth.