RU2772527C1 - Machine for joint automated lapping of ball joint parts - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: invention relates to a machine for joint automated lapping of parts in the form of ball joints. The machine contains a frame with a vertical column mounted on it, a system of main movements, a system of coordinated control of all machine organs, adjustment links for processing ball joints with different hole arrangements and a table. The table is designed with the possibility of installing a ball joint, and a laser sensor is mounted on it to measure the compliance of the connection of the ball joint links, as well as a software-controlled pressure system in the lapping area and a system for feeding and collecting technical liquids and abrasive suspensions. The system of main movements is made with the possibility of moving along the vertical column using a software-controlled adjustment drive and consists of a software-controlled precession drive, a nutation drive with a compensating link and a self-rotation drive with a translational kinematic pair with a spring-loaded base.

EFFECT: possibility to implement the process of joint automated lapping of ball joint parts with a different location of the hole in the lid for a movable finger.

1 cl, 3 dwg

Description

The invention relates to abrasive processing and can be used for joint grinding of spherical surfaces of parts of a product of the "ball joint" type, consisting of three main parts: a thrust bearing (base), a cover and a movable pin (ball pin).

A device for processing spherical surfaces is known (see patent SU 1324828 A1), containing a frame, a spindle with a drive, a power head with a leash mounted on a swing arm, as well as an emphasis and a copier that correct the position of the power head for processing spherical surfaces of different radii. However, on this device it is impossible to carry out joint automated grinding of parts of the ball joint due to the lack of independent software-controlled systems of movement, pressure, supply and collection of technical fluids and abrasive suspensions and control.

It is also known a device for abrasive processing (see patent SU 1092033 A) of spherical surfaces, selected as a prototype, containing a part holder, a drive connected through a carrier and a leash to the tool spindle, a pressure mechanism made in the form of a lever and connected to a carrier, a device supply of abrasive slurry.

However, in this device it is impossible to provide joint automated grinding of parts of the ball joint, since it lacks: the ability to implement all types of joint movements with rigid links, the necessary adjustment elements and devices for monitoring product quality parameters. Also, the disadvantages of this device are: the lower location of the drive, which increases the risk of abrasive slurry on the contact surfaces of the drive elements; dependence of the allowable pressure in the lapping zone on the lapping speed; the presence of a minimum allowable lapping speed, determined through the required amount of lifting force and pressing force of the lapping, which makes it impossible to process at low speeds; lack of a device for collecting waste abrasive slurry.

The purpose of the invention is to enable the implementation of the process of joint automated grinding of parts of ball joints with different locations of the holes in the cover for the movable pin.

This goal is achieved by the fact that the equipment contains a system of drives of the main movements, a system for supplying and collecting technical fluids and abrasive suspensions, a product quality control system, adjusting elements and a centralized control system for the equipment.

Figure 1 shows the kinematic diagram of the machine; figure 2 - system for supplying and collecting technical fluids and abrasive slurry; figure 3 - product quality control system.

A vertical column 2 is installed on the machine bed 1, along which a system of main movements moves with the help of a program-controlled setup drive 3. The system of main movements consists of a program-controlled precession drive 4, a nutation drive 5 and a natural rotation drive 6, which make it possible to implement all types of spherical movement for the joint grinding of parts of the ball joint 7. Electricity is transmitted to the nutation and natural rotation drives through a pair of sliding electrical contacts 8, and the transmission and reception of the control signal - by means of a radio-modular unit 9. To prevent excessive negative oscillations of the system of main movements caused by the displacement of the center of mass of the drive of its own rotation relative to the axis of the drive of precession, a compensating link 10 is provided. Transfer of movement from the drive of its own rotation to the hinge ball joint is carried out through a translational kinematic pair with a spring-loaded base 11, which is connected to the ball joint by means of a coupling 12. The pressure in the grinding zone is created by a program-controlled pressure system 13, which Paradise together with the ball joint is rigidly fixed on the table 14. Due to the adjusting elements 15, the position of the drive and the table is adjusted to obtain the coaxiality of the precession drive and the axis of the hole in the hinge cover. The control system 16 is responsible for ensuring the consistency of the operation of all program-controlled organs of the machine. The system for supplying and collecting technical fluids and abrasive suspensions consists of an upper and lower part. The upper part is presented in the form of two nozzles 17 mirrored relative to the plane of symmetry of the machine, supplied by a controlled drive. An abrasive slurry is supplied through one branch pipe, and waste technical fluids are collected through the second. The lower part is presented in the form of a sealed mechanized connection with a through hole 18, to which the necessary nozzles are connected to supply the necessary technical liquids to the processing zone for washing and cleaning the contact spherical surfaces of the hinge parts. The quality control system of the product monitors the quality requirements of the hinge for the compliance of the connection of the hinge parts by means of a laser sensor 19 supplied by the drive and controls the requirements for the moment of forces of rotation of the part, the movable finger by means of data on the electricity consumed from the drives of the main movement system.

The machine works as follows.

The pre-assembled ball joint 7 is installed on the machine table 14. Next, the joint is connected to the self-rotation drive 6 by means of the coupling 12 and the pressure application system 13 is attached. nutation 5, a self-rotation drive 6 with a pressure application system 13 and a system for supplying and collecting technical fluids and abrasive suspensions. Processing goes on until the required requirement for the moment of frictional forces of rotation of the part is reached, the pin is movable in the ball joint 7, calculated by the following formula:

- момент сил, создаваемый приводом собственного вращения 6;where

- the moment of forces created by the drive of its own rotation 6;

- момент инерции всех звеньев, вращаемых приводом собственного вращения 6;

- the moment of inertia of all links rotated by the drive of its own rotation 6;

- угловое ускорение, создаваемое приводом собственного вращения 6.

- angular acceleration created by the drive of its own rotation 6.

The moment of forces created by the engine is determined by the following formula:

- мощность, потребляемая приводом собственного вращения 6;where

- power consumed by the drive of its own rotation 6;

- частота вращения привода собственного вращения 6.

- frequency of rotation of the self-rotation drive 6.

Upon reaching the requirement for the moment of friction forces of spinning, the machine switches to the hinge cleaning mode, while a cleaner is supplied through the hole in the connection 18, and the second pipe 17 connected collects the waste technical fluids. Further, if necessary, the control program controls the flexibility of the connection of the hinge parts. To do this, the self-rotation drive 6 is moved by means of the nutation drive 5 to a coaxial position with the precession drive 4, and the laser sensor 19 is brought into working position, then the setup drive 3 moves down the system of main movements by the amount of free play and compression of the spring-loaded base of the translational pair 11. On Based on the obtained measurements of the moment of friction and compliance of the connection of the hinge parts, the control program gives a conclusion about the suitability of the product.

Claims (1)

A machine for joint automated grinding of parts in the form of ball joints, containing a frame with a vertical column mounted on it, characterized in that it is equipped with a system of main movements, a system for coordinated control of all parts of the machine, adjusting links for processing ball joints with different arrangement of holes and a table, made with the possibility of installing a ball joint and on which a laser sensor is mounted to measure the compliance of the connection of the links of the ball joint, and a software-controlled system for applying pressure in the lapping zone, and a system for supplying and collecting technical fluids and abrasive suspensions, while the system of main movements is made with the possibility movement along the vertical column using a program-controlled setup drive and consists of a program-controlled precession drive, a nutation drive with a compensating link and a natural rotation drive with a translational kinematic pair with a spring-loaded main ovation, which is made with the possibility of attaching by means of a coupling to the ball joint.

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