SU1495020A1 - Method of milling in n/c machines - Google Patents

Abstract

The invention relates to metal cutting and can be used for milling on machine tools with software control. The purpose of the invention is to increase productivity by eliminating deceleration and acceleration of the relative movement of the part and tool. Cutting tool 1 when moving from section 2 of the trajectory to section 3 is moved along an arc of a circle tangential to these areas. The radius of the circle is determined from the ratio R≥V ² : 2A, where V is the speed of the relative movement of the cutting tool

A is the value of the allowable acceleration of the relative tool movement along the machine coordinate axes. The radius of the arc of a circle and the distance L from the junction points of the sections with the arc to the point of intersection of the trajectory sections are determined from the relation L = R TG (β: 2), where β is the angle of change of the direction of relative movement in the sections. 1 il.

Description

one

(21) 4162223 / 23-08

(22) 12/15/86

(46) 07.23.89. By11, N / 27 (72) G.I. Rozenblyum, E., V. Busygin and V. V. Kirillov (53) 621.914.1 (088.8) (56) USSR Author's Certificate N 1420770, cl. B 23 C 3/00, 1986.

(54) MILLING METHOD. PROGRAM CONTROL ELEMENT MACHINES (57) The invention relates to metal cutting and can be used for milling on machine tools with programmed control. The purpose of the invention is increased productivity due to elimination of braking and acceleration of relative

displacement;, eTajn and nns grums nta. When using tool 1, when moving from section 2 of the trajectory to section 3, it is moved along an arc of a circle tangent to these sections. The radius of the circle is determined from the ratio 2a, where v is the speed of relative cutting of the cutting tool; a - the magnitude of the allowable acceleration of relative tool life along the axes of the machine coordinates. The radius of the arc of a circle and the distance 1 from the junction points of the sections from the arc 11 to the point of intersection of the trajectory sections are determined from the relation (.2), where p is the angle of change in the direction of the relative movement in the sections. 1 il.

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The invention relates to the processing of metals by cutting and can be used for milling on machine tools with programmed control in two or more coordinates.

The purpose of the invention is to increase productivity by eliminating deceleration and acceleration with relative movement of the tool and part.

The drawing shows a diagram of the relative movement of the tool and the part.

The cutting tool (milling cutter) I is moved relative to the part along one of the sections 2 of the trajectory located at an angle ci to the other section 3 of the trajectory. Changing the direction of movement during the transition from section 2 to section 3 of the trajectory is carried out without braking and accelerating along the arc of a circle 4 tangent to these areas. The radius of the arc R is chosen from the ratio

v

where V is the speed of the relative movement of the cutting tool on the associated trajectory sections;

a is the value of the allowable acceleration of the relative displacement of the tool along the axes of the machine coordinates. The conjugation point on the trajectory sites is determined from the ratio

R tg 2

where 1 is the distance from

points 5 of intersection of matching trajectory sections to points 6 and 7 of conjugation with a circular arc; f) - angle of change of direction of relative movement in areas I

Claims (1)

Invention Formula The method of milling on machines with. software, in which a transition from one trajectory section to another, located at an angle to the first, is carried out along an arc of a circle tangent to the sections, characterized in that, in order to improve performance by eliminating deceleration and acceleration, a circular arc radius is chosen from the ratio Ha where V is the speed of the relative movement of the cutting tool on the associated trajectory sections; a is the value of the allowable acceleration of the relative tool movement along the machine coordinate axes, the distance from the junction points of the sections with the arc to the point of intersection of the sections of the trajectory 1 is determined from the ratio / 3 1 R-tg 2. where ft is the angle of change of direction relative movement in areas.