Centerless grinding machine processing

1. Body

Exploring the high-grade cast iron FC-30 through normalized heat treatment, exploring the low-wave furnace, furan resin sand mold casting, ensuring the stability, solidification and wear resistance of the body

2. Spindle

2.1 Static pressure spindle

High-precision hydrostatic bearing, using hydrostatic design with precision grinding, can greatly reduce the temperature difference and the shape of the traditional dynamic pressure bearing due to friction. After the precision design of the static pressure point, the pressure difference can be effectively controlled. Balance, which in turn increases the cutting force to the advantages of heavy cutting, high precision and long life. The high-rigidity spindle utilizes the design of a hydrostatic bearing to carry heavy loads and heavy cutting with a high-pressure oil film, which can effectively reduce the wear and keep the spindle in a true circle. The precision spindle is probed with SNCM-210H and heat treated by niobium carbon. The surface hardness can reach above HRC60, which can strengthen the torque.

2.2 dynamic pressure type main pomelo

Centerless grinding machine processing SNCM-220H is treated with latent carbon, computer controlled cryogenic treatment, surface hardness HRC62 or above, heart conditioning HRC25-30, spindle with strong torque, high precision, high life, using KJ-4 alloy bearing The three-point dynamic pressure oil film system uses a semi-hydraulic floating spindle. The spindle has few contact surfaces and low temperature, which makes the machine run stably and accurately at any time. The cooling cycle has good effect, high precision and long life.

3. Centerless grinding machine processing vertical wheel drive system

The adjustment wheel spindle motor is probed by the Japanese split servo. The speed control is 10~250rpm without the digit setting. It can be adjusted to the optimal full speed. When the outer diameter of the adjustment wheel changes, the same green speed can be maintained. With the transmission of the timing gauge belt, it can reduce vibration and reduce noise. The motor base and the main shaft base are integrally connected, and the motor also follows the trouble when the adjusting wheel is tilted, completely eliminating the problem that the pulley and the belt are not parallel and twisted.

4. Spindle circulating oil system 4.1 dynamic pressure type

The main shaft automatic lubrication and oil pressure dressing are suitable for the same oil pump. The external oil tank is convenient for cleaning and oil change. The circulating oil is filtered by two oil filter nets and equipped with a pressure controller to ensure the life of the main shaft.

4.2 static pressure type

The grinding wheel head hydraulic pump and the grinding wheel spindle drive motor are interlocked. When the grinding wheel start switch is pressed, the lubricating oil must be tested by the pressure switch before reaching the bearing. If the pressure is insufficient, the pressure switch cannot be pushed, the spindle motor will not start, so when the pressure When the valve is insufficient or the oil circuit is blocked, the pressure switch automatically stops the spindle operation and protects the spindle and the bearing. (Quiet soil and hydraulic pump products, Ma Yun 12 type 1HP, 8 type, 20 type, 24 type, 2HP)

 5. Pressure regulating valve

The grinding wheel spindle maintains a high hydrostatic pressure device, and the high pressure oil is used as a radial bearing to support the oil inlet with a pressure regulating valve, and the working pressure is set to 20 Kglcmr.

6. Slide table

The sliding platform probes the V-shaped slide rails and the wedge-shaped guard rails to make the sliding slides stable and stable. At the same time, it can avoid the intrusion of mud liquid. The upper slide slides the structure of the trough and has the function of rotating around 5". At the same time, the upper and lower feeds are equipped with a fine-tuning feed, and the fine adjustment of the feed can reach 0.001mm, which is convenient to use and fully improves the operation precision.

7. Dressing device

It is made of high-grade cast iron FC-30, heat treated, precision ground and shovel. Hydraulically driven, stepless speed change, smooth and smooth, and has a rushed handle for urgent needs. When doing the grinding, according to the nature of the work and needs, adjust and adjust the whole seat (the seat can be rotated by 5°), so that the working object and the adjusting wheel have better contact surface, so that the finished product is straight and rough. The degree is relatively improved.