Scroll disk and new energy vehicle steering oil pump - bushing parts machining program

Case 1:

Compressor within the dynamic disk and static disk collectively known as the scroll disk, is the new energy air conditioning electric scroll compressor in the core part, static disk for the fixed involute, the dynamic disk is eccentric gyration flat moving involute type, in the compressor two double function equation line dynamic and static scroll disk occludes each other, due to the characteristics of the scroll occlusion makes the dynamic and static disk of the precision requirements are very high, generally in the 0.02mm, the industry generally use high-precision CNC machining centers are commonly used to ensure the size. This issue focuses on scroll disk machining solutions.

Parts Analysis

Vortex profile belongs to the shape of deep groove and thin wall, the profile processing of the contour, verticality of the side wall and the bottom surface and surface roughness are required to be high, the specific requirements are as follows: contour 0.02mm, verticality 0.01mm, straightness 0.005mm, roughness Ra0.6μm, parallelism 0.02mm, flatness 0.01mm.

processing difficulty

In addition to the machine tool itself, the environmental conditions and the semi-finished product of the scroll disk are also very important. Generally, in order to maintain the stability of the machining quality, the scroll disk needs to be machined in a constant temperature workshop, and the machine tool should be equipped with a cutting fluid temperature controller. The front process is the basis for finishing, and the positioning datums related to finishing need to be tightly controlled. Tooling is also an important factor to ensure the contour of the scroll. Try to use fixtures with automatic centering function, and at the same time need to set a reasonable clamping force to control the clamping deformation. Cutting tools are generally used non-standard design to achieve the purpose of suitable to ensure the contour, recommended the use of welded PCD or welded CBN structure to improve efficiency and roughness. In addition, the spindle center water pressure and cutting fluid composition and concentration will also have an adverse effect on the use of tools and contour accuracy.

Perfectly solves the problem of vibrating knife lines on the side of the profile

Case 2:

New energy vehicle steering oil pump - bushing parts, this part needs mass production, interchangeable assembly. High precision and finish are required. This issue focuses on bushing processing solutions. The bushing parts embryo from casting, vertical machining center V8 milling, drilling, boring processing. The parts require concentricity, roundness, perpendicularity, position and so on. Machine tools and cutting tools to meet the high efficiency, high precision, high finish processing needs.

Fixture program

Machining video with PCD tool chart