Device for controlling pressing process when making press joints in cylindrical objects

FIELD: machine building.

SUBSTANCE: present invention pertains to machine building, particularly to devices for controlling the pressing process when making press joints in cylindrical objects for automating control of assembling processes. The device for controlling the pressing process when making press joints in cylindrical objects has a hydraulic press, joined together four updrafts with an elevating beam, four measuring transducers, each of which is in form of a strain sensor, an analogue-to-digital converter and an evaluator. The strain sensors are made on a measuring bridge circuit with provision for registering forces arising in the four updrafts. The outputs of the strain sensors are connected to the inputs of the analogue-to-digital converter, and the outputs of the latter are connected to inputs of the evaluator.

EFFECT: simplification of the design and widening of technological capabilities of the invented device.

2 dwg

 

The present invention relates to a device control process of pressing, when receiving a press-fit connection object has a cylindrical shape by using a hydraulic press and can be used in mechanical engineering.

It is known device [Device for synchronizing the movement of the bar hydraulic press. USSR author's certificate No. 1648769, CL VV 15/24], containing the upper and lower synchronizing cylinders filled with liquid under pressure and connected cross between a highways. The cylinders rest on the bench press and connected with the movable head plate. The system also includes a hydraulic multipliers, electrohydraulically, pumping stations, related electrohydraulically, pressure sensors, four pieces attached to the mains, pumping station and to the main cylinder of the press unit electrohydropulse. When off-center loading beam occurs the moment which counteracts the torque of the load that causes one of the outputs Elektroprivreda device signal negative sign. This signal after the appropriate transformations in the system leads to the production control on the yoke, causing it to rotate in the opposite direction to correct the skew.

The disadvantage of this device is low the th accuracy, low performance.

The objective of the invention is to simplify the construction and expansion of technological capabilities device control process of pressing, when receiving a press-fit connection object has a cylindrical shape by using a hydraulic press.

The problem is solved as follows: the proposed device is a hydraulic press and connected with him four vertical rods movable yoke, four measuring transducer, each of which is made in the form of a load cell, the analog-to-digital conversion and computation, while the load cell made according to the measuring bridge circuit with registration efforts, resulting in four vertical rods, the outputs of the above-mentioned load cells are connected to the inputs of analog-to-digital conversion, and outputs the latter are connected with the inputs of the block.

The essence of the technical solutions is illustrated by drawings (figure 1, figure 2).

The proposed mechanism of the device contains a housing base part with a cylindrical bore 1, the upper plate 2, the lower movable plate (yoke) 3, rod 4, the load sensor 5, a strain, injected item 6, Gidropress 7, the stepping motor hydrosilicates 8, screw bearing 9, the bearing ball thrust bearings 10, the leading pole the nu 11, the driven gear 12, the block load cells 13, the analog-to-digital conversion 14 and block 15.

The device works in the following way (figure 1, figure 2). Top plate 2 is mounted on the base Cabinet parts 1, and the lower movable plate (traverse) 3 cups of Gidropress 7 is attached injected item 6. After the preliminary installation (does not require high accuracy, comparable with tolerances for press connection) in the hydraulic cylinder 7 is pressure. The load cells 5 in the process of pressing (at the initial moment connection details) form signals about the efforts that occur in vertical rods 4, the signals from which are processed in the CPU unit 14, and then the digital information is fed to the computing unit 15.

The operation of the device caused by the use of a bridge measuring circuit incorporating strain gages 16 for each of the four load cells 5 that generates signals proportional to the effort in rods 4, when the pressing part 6 in the base 1 (Fig 1, 2).

A computation 15 (2) generates the control signals for small displacements the vertical rods in two mutually perpendicular planes. During operation of the injected part 6 after the preliminary orientation is mounted and fixed on the bottom of the movable plate 3 and then zapressovyvajutsja in the base part 1 (Fi is .1). For position correction beam provided by the electric motors with power steering 8, which through the gears 11, 12 are set in motion by the screw mounts 9, rotating on bearings 10, thereby imparting axial movement tagum 4 which can be adjusted the position of the bar relative to the upper plate 2 and the base part 1.

The use of the device will increase the level of automation of the control process of the pressing bodies of cylindrical shape, to expand the technological capabilities of the device, to improve the accuracy and reliability of connection. Improving the efficiency of the control device of this type is based on the use of computer technology to control the process of pressing, which will reduce the cost of products and thereby to ensure the competitiveness of the proposed electro-mechanical device.

List of figures

Figure 1. The device control process of pressing, when receiving a press-fit connection of objects of cylindrical shape.

Figure 2. Schematic diagram of the device control process of pressing, when receiving a press-fit connection of objects of cylindrical shape.

The device control process of pressing, when receiving a press-fit connection object has a cylindrical shape by using a hydraulic press and connected to it by four vertical the social rods movable beam, contains four measuring transducer, each of which is made in the form of a load cell, the analog-to-digital conversion and computation, while the load cell made according to the measuring bridge circuit with registration efforts, resulting in four vertical rods, the outputs of the above-mentioned load cells are connected to the inputs of analog-to-digital conversion, and outputs the latter are connected with the inputs of the computing unit.



 

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