TAILIEUCHUNG - Making Pistons Part 2

Tham khảo tài liệu 'making pistons part 2', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 3. Make Drawings Using a dial caliper to accurately measure a cleaned piston make a full sized drawing of your existing part. You must accurately record and sketch all of the information. Because you will constantly refer back to your drawing during both the pattern making and machining processes you might want to make a few photo copies. I find myself writing notes all over them as I calculate machining distances and thicknesses. 32 A typical piston drawing seen on previous page. By making a good scale drawing you will observe the difference in diameter between the pin side of the piston and the thrust side. You will also notice the extra clearance at the top of the piston required for expansion as the piston reaches operating You should probably make the complete drawing of your first piston. After that you may choose to skip the detail drawing and move directly to the piston blank drawing as seen on the next page. Note that if you make the ring groove cutter you can skip the ring spacing information in your drawings because it is predetermined by the cutter or the radial thickness of the rings page 13 . After the part drawing is made make drawings of the core and piston blank pattern. This can be a tedious process. You must add machining allowances and draft to all the sides while maintaining the proper thickness of the head and ring belt. Because sand-cast pistons will have lower mechanical properties than permanent mold cast pistons remember to add .050 to 1-inch to the wall thickness smaller inside diameter of the piston . Placement of the pin bosses is also important. Finally add a rib that runs around the inside bottom of the piston. When machining all of the lengthwise dimensions are located relative to the bottom surface of this rib. If you locate it the same distance relative to the pin bosses on different core molds you can use the same mandrel for turning several different types of pistons. Machining allowance The piston is finished .

TÀI LIỆU LIÊN QUAN
69    272    11
TỪ KHÓA LIÊN QUAN
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.