RU2038926C1 - Device for machining intricate surfaces of parts - Google Patents

Abstract

FIELD: metal working. SUBSTANCE: device for machining intricate surfaces of parts has two toothed mechanisms which are kinematically linked; spindle of tool is mounted on satellite gear of first mechanism which is linked with sun gear and carrier. Both mechanisms are differential; carriers of both mechanisms have rigid coupling, input link of second differential mechanism is connected with cam mechanism and output link is connected with sun gear of first differential mechanism. EFFECT: machining of surfaces outlined with ellipses and ovals. 1 dwg

Description

 The invention relates to metalworking and can be used for surface treatment of parts and cutting welds of complex configuration (such as an ellipse and oval).

 A device for processing complex surfaces of parts is known, on the basis of which a planetary mechanism is installed, including a carrier with a satellite and a table connected to the mechanism for attaching the workpiece. The device is also equipped with a gear-lever mechanism made in the form of a central wheel and a lead with a satellite engaged with the central wheel and bearing a table eccentrically fixed relative to its axis of rotation, the central wheel being rigidly connected to the carrier and the lead with a satellite of the planetary mechanism. (See AS USSR N 961869, class B 23 C 3/00, BI N 36 of 09.30.82).

 Devices of a similar purpose are known with a tool associated with a planetary mechanism, for example, a device including a carrier and satellite mounted with rotation capability (see Turner I.E. Reiniker gear milling machine for processing chevron wheels according to the Butcher method. M. Mashgiz, 1933). However, the known devices do not provide optimal cutting conditions when processing parts, which adversely affects the quality of the manufactured product and does not allow to give the necessary performance.

 Known selected as a prototype is a "Device for processing parts outlined by epi- and hypocycloids and their equidistant", containing a tool associated with a planetary mechanism, including a carrier and satellite mounted for rotation. The device is also equipped with an additional planetary mechanism with a removable central wheel and a satellite carrying the tool, the central wheel and the carrier of the additional planetary mechanism are rigidly connected respectively with the carrier and satellite of the first planetary mechanism.

 However, the known device does not provide processing surfaces outlined by ellipses and ovals.

 The aim of the invention is the provision of surface treatment, outlined by ellipses and ovals.

 This goal is achieved in that the device contains two gear mechanisms kinematically connected to each other, while the tool spindle is mounted on the satellite of the first mechanism connected to the central wheel and the carrier, both mechanisms are differential, while the carrier of both mechanisms have a rigid connection, input link the second differential mechanism is connected to the cam mechanism introduced into the device, and the output to the central wheel of the first differential mechanism.

 In FIG. 1 shows a kinematic diagram of a device.

 The device comprises a drive located on the housing 1 and including a motor 2, a gear 3.

 A differential mechanism 4 with a carrier 5 is located inside the housing 1. The carrier 5 of the differential mechanism 4 is mounted rotatably in the housing 1. On the carrier 5 there is a gear ring 6 engaged with a gear 7 connected by a shaft with a gear 3. On the satellite 8 of the differential mechanism 4 at a given distance from the satellite is a spindle unit 9 with a cutting tool 10. The Central wheel 11 is kinematically connected with the output link (gear 12) of the additional differential mechanism 13.

 The carrier 14 of the additional differential mechanism 13 with the gears 15 located on it is rigidly connected to the carrier 5 of the differential mechanism 18.

 The cam 19 is connected to the shaft 20 with a gear wheel 21, which is engaged with the ring gear 6.

 The device also contains elements of a kinematic chain of rotation of the tool and vertical feed (not shown).

 A device for processing complex surfaces of parts according to the invention works as follows.

The cutting tool 10 has the ability to rotate around the axis, the vertical axial movement from the corresponding kinematic chains (not shown) and movement along the contour of the corresponding part. Movement along the contour of a part is carried out by adding two movements:
rotation of the carrier 5 of the differential mechanism 4 around the axis along the chain: engine 2 gearbox 3 gear wheel 7 - ring gear 6, mounted on carrier 5;
the rotation of the spindle unit 9 together with the satellite 8 is carried out by rolling around the central wheel 11 as a result of rotation of the carrier 5.

 The rotation of the cam 19 of the cam mechanism 18 is carried out by the gear wheel 21 through the shaft 20 during rotation of the carrier 5 with the gear wheel 6. The angular speed of the central wheel 11, which is connected with the gear wheel 12 of the additional differential mechanism 13, depends on the angular speed of the gear wheel 16 associated with the beam 17 of the cam mechanism 18, and the angular velocity of the carrier 14 associated with the carrier 5 of the differential mechanism 4.

1

+

где ω₁ угловая скорость сателлита 8;
ω₂ угловая скорость коромысла 17 кулачкового механизма;
ω_h угловая скорость водила 14;
Z₁₁ число зубьев центрального колеса 11;
Z₈ число зубьев сателлита 8;
Z₁₆ число зубьев зубчатого колеса 16;
Z₁₂ число зубьев зубчатого колеса 12;
при

ω₂ 0 ω₁ ω_h, что соответствует движению центра инструмента по эллипсу с параметрическим уравнением:
Х (R + r) cos φ, где 2 (R + r) большая ось эллипса,
Y (R r) sin φ 2 (R r) малая ось эллипса,
φ угол поворота водила первого дифференциального механизма;
R расстояние между осями сателлита и центрального колеса;
r расстояние между осью шпинделя в сателлите.The relationship between the angular velocities of the satellites 8 with the spindle units 9 located on them, the carrier 5, the rocker arm 17 of the cam mechanism 18 can be found from the following equation:
ω ₁ =

1

+

where ω _{1 the} angular velocity of the satellite 8;
ω _{2 the} angular velocity of the rocker arm 17 of the cam mechanism;
ω _{h the} angular velocity drove 14;
Z _{11 the} number of teeth of the Central wheel 11;
Z _{8 the} number of teeth of the satellite 8;
Z _{16 the} number of gear teeth 16;
Z _{12 the} number of gear teeth 12;
at

ω ₂ 0 ω ₁ ω _h , which corresponds to the movement of the center of the tool in an ellipse with the parametric equation:
X (R + r) cos φ, where 2 (R + r) is the major axis of the ellipse,
Y (R r) sin φ 2 (R r) the small axis of the ellipse,
φ angle of rotation of the carrier of the first differential mechanism;
R is the distance between the axles of the satellite and the central wheel;
r distance between the spindle axis in the satellite.

When ω ₂ ≠ 0, the center of the tool moves along the path defined by the cam profile of the cam mechanism (along the oval).

Claims (1)

 DEVICE FOR PROCESSING COMPLEX SURFACES OF PARTS, containing two gear mechanisms kinematically connected to each other, while the spindle of the tool is mounted on the satellite of the first mechanism connected to the central wheel and the carrier, characterized in that both mechanisms are differential, the carrier is rigidly interconnected, and the input link of the second differential mechanism is connected to the cam mechanism introduced into the device, and the output link to the central wheel of the first differential mechanism.

Images