摘要:
A metallic ingot for impact pressing includes a contact surface of the metallic ingot to contact a male mold in impact pressing having a maximum height roughness Rz of 20 μm to 50 μm and an average length of a roughness curve element RSm of 150 μm to 400 μm, the male mold being to be used in combination with a female mold in the impact pressing.
摘要:
The invention relates to a construction method for improved tracer ammunition production.There is provided a method of forming a component for a round, said method comprising the step of causing said component to be drawn through at least one floating die.
摘要:
A method for producing a metal cylinder includes preparing a metal slug having a surface adjusted so that the crystal grain diameter at a depth of 10 μm from the surface is smaller than that at a depth of 100 μm from the surface, and the crystal grain diameter at a depth of 10 μm from the surface is 30 μm or more and 120 μm or less; and forming a cylinder by impact pressing of the metal slug having the surface as a bottom.
摘要:
A method for producing a cylinder tube (2), which is closed at the end so as to be fluid-tight, from a tubular blank (30). The blank (30) is formed into the cylinder tube (2) with the aid of a cold forming method in such a way that on an end region (6) of the cylinder tube (2) an opening (8) remains in the cylinder tube (30), a mounting region (12) is produced in the radially outer edge region (10) of the end region (6) and the cylinder tube (2) is closed by fluid-tight attachment on the mounting region (12) of an end piece (14) which closes the opening (8). A cylinder tube (2) comprises the cylinder tube (2) cold formed from the blank (30) having an opening (8) at the end, the mounting region (12) and an end piece (14) attached to the mounting region (12) so as to be fluid-tight.
摘要:
In the metal billet to be used for hot dilation forming, a forward side with respect to the pressing direction has a quadrate section and its diagonal length is not more than an inner diameter of a container. Moreover, a backward side with respect to the pressing direction has a circular section and its diameter is substantially same as the inner diameter of the container. The metal billet is heated to a temperature suitable for press working and is set into a container for press forming. While a center of a workpiece of the metal billet is being bored by a boring punch to be operated by a pressing machine, the metal billet is hot-dilated so that a bottomed container for a cask is formed.
摘要:
In the metal billet to be used for hot dilation forming, a forward side with respect to the pressing direction has a quadrate section and its diagonal length is not more than an inner diameter of a container. Moreover, a backward side with respect to the pressing direction has a circular section and its diameter is substantially same as the inner diameter of the container. The metal billet is heated to a temperature suitable for press working and is set into a container for press forming. While a center of a workpiece of the metal billet is being bored by a boring punch to be operated by a pressing machine, the metal billet is hot-dilated so that a bottomed container for a cask is formed.
摘要:
A method and apparatus in a hot multi-stand tube mill for producing a thin metallic tube having end portions which corresponds to the wall thickness and diameter of the rest of the rolled tube or alternately, tapered ends. Each stand is provided with a set of three cooperating rolls arranged to form a roll pass opening. According to the tube's positioning in the mill, an appropriate additional adjustment of the rolls to decrease or enlarge the roll pass diameter is made in one or all of the last three stands. Both an initial roll setting varying means and an additional roll setting varying means cause movement of wedges abutting the roll chocks thereby causing movement of the rolls.