our operational headquarters
Grugliasco (TO) Italy

Via Libertà 47/49
10095 Grugliasco TO

Working hours:

Mon-Fri
8:00am - 6:00pm (GMT +1)

our contact details:

Boccetti S.r.l.
Via della Libertà 47/49
10095 Grugliasco TO

Do you need information?

info@boccetti.com

phone:

+39 011 789 598

PRECISION MECHANICAL CONSTRUCTION AND EQUIPMENT INDUSTRIAL AUTOMATION

GRINDING MACHINE FOR ENGINE VALVES PROFILE

The grinding machine RPB has been designed to process the underhead and undercut profile of internal combustion engine valves (Fig. 2.1). All motors of the machine are digital servo motors.

The RPB great flexibility allows to machine a wide range of engine valves with different length, head diameter, stem diameter and seat angles. The setup time is very fast. The grinding wheel has a Ø 610 mm.

 

The RPB great flexibility allows to machine a wide range of engine valves with different length, head diameter, stem diameter and seat angles

OPERATIONAL DESCRIPTION

After loading the valve is held by a rotating collet of the workpiece spindle. This unit moves on the loading and unloading slide (T axis).
The grinding wheel and dressing assembly are mounted on the grinding wheel translation slide which allows, by a small movement parallel to the piece , to adjust and optimize the position “grinding wheel/valve.
LThe grinding wheel is put in rotation by an electric spindle mounted on a carriage running on the grinding wheel increment slide. The grinding wheel slide axis is at 60° compared to the valve axis. The grinding wheel dressing is obtained by a diamond roller assembled on two slides with orthogonal and independent motions in order to create the requested profile. The dresser crossed slides assembly is mounted on the grinding wheel increment slide.
The loader picks up the valve coming from a rubber string conveyor, it lifts that to the level of the workpiece head. Here the valve is clamped by the collet of a rotating shuttle to align it with the workpiece head axis. During the unloading the valve is clamped by the open collet, remained standby, and placed on the outlet rubber string conveyor.
The valve head, during the grinding operation, is pushed against the grinding wheel by two hard metal plates to counteract the grinding wheel thrust. This device is called Head Reaction Group.

GRINDING WHEEL UNIT

The grinding wheel unit is assembled on the increment slide which grants the approaching motion to the valve and the increment motion to grind.
On the same slide are also mounted the dressing increment slides and the dressing spindle.

TECHNICAL FEATURES
. unit of measure value
Valve size: head diameter
stem diameter
length
mm. 20 - 60
4,5 - 12
70 - 200
Cycle time pz/h 400
Grinding wheel sizes mm. 610 x 44 x 203,4
Grinding wheel max speed. mt./sec. 100
Grinding wheel spindle power kW 30
Power supply V/Hz 400V 50Hz 3pH
Air supply bar 5 - 6
Floor space (x height 2100 mm.) mm. 2200 x 1860
Machine weight kg. 6500

Information in accordance with Article 13-14 of EU Regulation 2016/679. This website uses cookies to ensure a better user experience. By clicking OK you agree to the use of cookies on your device. Read more