Precision centerless grinding machine

1. Equipment name & model

1) Name: Precision Centerless Grinding Machine

2) Centerless grinding machine loading and unloading schematic diagram.

3) Technical Specifications:

Item Unit Model KSFX-18S

Standard processing range(diameter) mm Φ 1-60

Grinding wheel sizes(OD*W*ID) mm Φ455*205*Φ228.6

Adjusting wheel sizes(OD*W*ID) mm Φ255*205*Φ111.2

Grinding wheel speed RPM 1520

Adjusting wheel speed RPM 0-250

Grinding wheel drive motor KW 15kw

Adjusting wheel servo motor KW 3.0 kw

Hydraulic pump drive motor KW 0.75 kw

Cooling pump drive motor KW 0.25 kw

Adjusting wheel feed handwheel mm 3.5/rotation  0.05/scale

Adjusting wheel fine-tuning handwheel mm 0.1/rotation  0.001/scale

Worktable feed hand wheel mm 9.0/rotation  0.10/scale

Worktable micro adjustment hand wheel mm 0.2/rotation  0.001/scale

Dressing feed handwheel mm 2.0/rotation  0.01/scale

Adjusting wheel tilt angle Degree +6°~-5°

Adjusting wheel rotation angle Degree ±6°

Machine dimensions mm 2350*1960*1550

Packing sizes mm 2900*2400*1850

Machine weight KG 2850

Packing weight KG 3000

4) Machine precision:

01 Machine Tool Accuracy Checklist (Attached with Machine)

02 After grinding, following accuracy must achieve: (different grinding wheels are chosen for  different workpieces)

2. Equipment descriptions

(1) Body

The body and main components are cast in one time using Meehan high grade cast iron FC-30. Artificial normalization heat treatment and then natural aging treatment.

The main components are processed by YASDA, MITSUI SEIKI, TOSHIBA, ELB and other world-class equipment. Precision size up to micron level, ensure that the equipment foundation components of high precision.

(2) Spindle system

Spindle, Taiwan Jianchang brand, is SNCM-21H alloy steel. After hardening and tempering, carburizing heat treatment, and then computer controlled cryogenic treatment, its surface layer hardness is above HRC-62, and single side effective hardening layer reaches 1.5mm or more. The spindle adopts dynamic oil film spindle, runout is less than 0.001 mm.

(3) Adjusting wheel drive system

Adjusting wheel spindle drive motor is Delta servo motor. Speed control of 0-250rpm (digital control) can set speed arbitrarily and adjust to optimal linear speed. When adjusting wheel outer diameter changes, the same linear speed can be maintained to grind out best products.

Well designed servo motor is installed on adjusting wheel box and directly driven by synchronous belt. It can be tilted at the same time as adjusting wheel during grinding to ensure that the two pulleys are always parallel.

 It overcomes many adverse effects caused by inertia loss and chain angle (caused by chain multi-link transmission) on old type centerless grinding machines. And avoid frequent replacement of chain and zipper springs.

(4) Spindle circulating oil system

The spindle auto-lubricating circulating oil (advanced spindle oil 10 #) and oil pressure dressing device are same oil pump. External oil tank, easy to clean and change oil.

Spindle circulating oil is filtered by two oil filters and equipped with pressure controller to ensure spindle life. Double-loop cooling system ensures constant temperature of spindle oil.

(5) Circuit System

Japanese Fuji Circuit System, is beautiful, durable and easy to operate. Heightened and enlarged electric box make it easy to operate, and is more conducive to heat dissipation of the circuit system.