RU2697282C1 - Screw auger forming machine - Google Patents

Abstract

FIELD: machine building.SUBSTANCE: screw auger forming machine comprises a base supporting a workpiece support in the form of an open ring, an oil station with a control unit, comprising a control console connected through the hydraulic cylinder to the moving part of the press, which, through a supporting support and a matrix support plate, compresses the workpiece between the forming plates of the matrix and forms a screw spiral by acting on the fixed part of the press with a hydraulic cylinder. Supporting support is made in the form of a height-adjustable bracket, and the matrix is in the form of a set of hardened plates made in the form of rectangular trapezoids. Matrix support plate is made in the form of a steel hardened plate in the form of an isosceles triangle. Molding plates are installed in slots of matrix support plate, which is installed on press.EFFECT: enlarging technological capabilities of the machine due to possibility of calibration of manufactured products depending on properties and composition of steel, as well as increased accuracy of their shape.1 cl, 5 dwg

Description

The claimed invention relates to mechanical engineering, more specifically to industrial metalworking plants, namely to hydraulic presses and can be used to form a screw spiral from blanks in the form of rings with a radial section.

At the moment, there are several technologies for the production of screw spirals, such as:

- cold or hot forming of a spiral from a continuous straight strip;

- forming a spiral from blanks in the form of split rings on a hydraulic press with a matrix that accurately repeats the necessary turn;

- manufacturing of a spiral by preliminary welding of blanks in the form of split rings to each other and subsequent stretching of the spiral along the axis;

- stretching the split ring in special grippers to obtain the necessary step.

A press for manufacturing auger blades is known from the technical field (Patent for invention RU 2 320 485, IPC B30B 1/32, B21D 11/06, Publ. March 27, 2008 Bull. No. 9) containing a bed, a hydraulic cylinder kinematically connected to one of workpiece attachment points. The bed is made in the form of a closed power circuit, inside of which there is a hydraulic cylinder. One end of the hydraulic cylinder is connected to the power circuit, and the other end to the central shaft. The central shaft is mounted inside the fixed attachment unit of the workpiece with the possibility of longitudinal movement along it and is fixed from rotation relative to it. A fixed workpiece attachment unit is mounted in the power circuit from the side opposite the hydraulic cylinder, and is made in the form of a sleeve with a L-shaped notch. The movable workpiece attachment unit is made in the form of a sleeve mounted on the central shaft from the side opposite to the hydraulic cylinder. The attachment points of the workpiece in the area of the L-shaped cuts are made with U-shaped grippers for installing the workpiece of the auger blades in them. The result is the operational reliability of the press, reducing its size and weight.

Also known from the prior art is a method and apparatus for forming a screw type screw (Application WO2017156587 from 2017-09-21, IPC B21D11 / 14). A device for use in forming a helical screw auger, the device comprising: a first and second support head of the drive, designed for relative axial movement relative to each other in the direction of the main axis in response to the movement of the first, and the second support head is configured so as to have the ability to provide many position adjustments, including lateral adjustment, whereby the first and second support heads can be offset or moved in the transverse direction relative to the main axis in the direction of the respective lateral axes and adjusting the rotation position in which at least one of the first and second working heads can rotate around a rotation axis, which extends in a direction generally parallel to the coaxial main axis. The apparatus includes a base and an auxiliary tool. The auxiliary means is movably mounted to the base and forms using the blank to form a rotation in at least a portion of the correspondence of the flight form to the predetermined flight feed.

A disadvantage of the known technical solutions is the rather low range of manufactured turns, as well as a significant dependence on the compliance of the ratios of internal and external diameters to the thickness of the workpiece.

Closest to the claimed invention in technical essence is a device and method for forming a screw-type screw, described in patent US 20140196515 (application 201214130837 from 20120705, IPC B21D11 / 14). The device includes: a base; and engaging means arranged to move toward the base, the engaging means being configured to engage with the workpiece so as to form a swirl in at least a portion of the workpiece substantially corresponding to a predetermined pitch of the screw.

The disadvantages of the known technical solutions include:

- the complexity and duration of the equipment settings, which includes special measuring devices that are pre-installed on the central forming plate. This method of adjustment is not very convenient, since in case of receiving a defective output, it is not always possible to immediately detect an error, but you will have to reinstall or adjust the matrix knives;

- a large number of interchangeable plates, which is required by the technology, since, in addition to the difference in the value of the angle β, the plates have different heights, since the technology requires adjustment of the matrix depending on the height of the flange. To cover the production of the basic sizes of screw turns, 50-60 plates are required;

- reducing the versatility of the use of the matrix depending on the diameters due to the fastening of the supporting supports of the workpiece, carried out directly on the forming plate in special holes located in the lower part of the plate;

- the requirement of mandatory installation of the workpiece perpendicular to the axis of movement of the movable part of the press to ensure the implementation of the technology, which requires fine-tuning and a large number of plates;

- more expensive performance and low reliability of the device, due to the fact that the central forming plate has the ability to change the installation angle for the release of turns of the screw with a flange that is not perpendicular to the axis.

The tasks to which the invention is directed are to facilitate and simplify the production of a screw spiral, reduce the cost of production of a screw spiral, expand the range of manufactured screw spirals.

These tasks are solved due to the fact that the claimed invention:

- It is completed with sets of plates, with various configuration of sharpening and a tilt angle;

- the device is equipped with a logical controller and a feedback sensor, which allows you to form spirals with specified parameters, excluding the human factor;

- In addition, the use of automatic systems allows you to speed up production.

The auger spiral forming machine comprising a base supporting a support configured to form a support for the workpiece so as to form a turbulence also includes an oil station with a control unit comprising a control console connected through the hydraulic cylinder to the central node of the machine, the central part of the machine being the movable part of the press which, through the supporting support and the base plate of the matrix, interacts with the workpiece, compressing it between the forming plates and forming a spiral of the screw in the middle By acting on the stationary part of the press with a hydraulic cylinder, the supporting support is a height-adjustable bracket, the matrix is a set of hardened plates made in the form of rectangular trapeziums, the oblique side having a sharpening angle depending on the angle α, each plate has at least one response plate made in mirror reflection, the height of the plates is the same and equal to the height of the landing groove on the matrix support, while the machine contains paired plates with an angle step of 2 degrees, where scrap α is the angle of separation of the forming plates; the matrix support plate is a hardened steel plate made in the form of an isosceles triangle, the angle between the sides of the triangle can vary from 40 to 80 degrees, and along the sides of the triangle there is a groove with a width equal to the thickness of the plates and a depth of 25 - 35 mm, in which plates are installed, supports with plates are mounted on the press, the angle of the plates is selected depending on the required curvature of the screw turn.

The technical result provided by the given set of features is to simplify the method of manufacturing a screw, increase the accuracy and repeatability of products, the ability to calibrate the manufactured turns depending on the properties and composition of the steel.

The inventive device can be used in industries producing products that include auger spirals, such as drilling equipment, screw conveyors, screw feeders and batchers, screw mixers and crushers. In addition, the invention can find application in enterprises using various screw equipment in their work, for equipping repair shops.

At the heart of the machine is a hydraulic press. The hydraulic drive is electrically controlled. The movement of the press slider is in the horizontal plane and is ensured by the operation of the hydraulic cylinder. The manufacture of a screw spiral is due to the presence of a matrix, which consists of two parts, one part is mounted on a fixed support of the press, the second is mounted on a slider. When compressing the workpiece between the matrices, the workpiece is deformed.

The auger spiral forming machine consists of an oil station with a control unit, where are located: a control console connected via a hydraulic cylinder to the central node of the machine.

The invention is illustrated by graphic material, where

figure 1 shows the appearance of the machine forming the spiral of the screw,

in FIG. 2 shows a forming plate in the central part,

in FIG. 3 shows a set of hardened paired plates,

figure 4 shows a fragment of a machine with support legs,

figure 5 shows the support matrix

where the positions indicated:

1 - the central forming plate;

2 - side forming plate;

3 - supporting support;

4 - matrix support plate;

5 - movable part of the press;

6 - fixed part of the press;

7 - blank;

8. - hydraulic cylinder;

9 - oil station with a control unit;

10 - management console;

11 - pressure gauge;

12 - Start / Stop buttons;

angle α is the angle of divorce of the forming plates;

angle β is the angle of inclination of the forming plate;

A - Height of the forming plate;

B is the average width of the forming plate.

The central node of the machine is the movable part of the press 5, which through the supporting support 3 and the support of the matrix 4 interacts with the workpiece 7, compressing it between the forming plates 2 and forming a screw spiral by acting on the stationary part of the press 6 with a hydraulic cylinder.

The support support is a height-adjustable bracket designed to hold the workpiece in position. The base plate of the matrix is necessary for fixing the forming plates. The moving part of the press is the slider. The fixed part of the press is the bed.

The matrix is a set of hardened plates made in the form of rectangular trapeziums, the oblique side having a sharpening angle depending on the angle α, each plate has at least one counter plate made in mirror image. The machine is equipped with paired plates with an angle pitch of 2 degrees. The height of the plates is the same and equal to the height of the landing groove on the matrix support.

The matrix supports are hardened steel plates made in the form of isosceles triangles. The angle between the sides of the triangle can vary from 40 to 80 degrees. There is a groove along the sides of the triangle with a width equal to the thickness of the plates and a depth of 25 - 35 mm. Plates are installed in these slots.

The supports with the plates are mounted on the press, the angle of the plates is selected depending on the required curvature of the screw turn.

The invention is based on the sequential compression of the radial part of the workpiece in the matrix. The workpiece is a ring with a radial cut. The matrix includes a set of hardened paired plates in the form of rectangular trapeziums having an angle β with a step of two degrees, with an oblique side sharpened at a certain angle, mounted on supports in such a way that the oblique sections create the necessary deformation in that part of the workpiece to which they affect. The central forming plate is set as a bisector and has side B equal to the width of the oblique forming plate in the central part. In addition, the matrix is equipped with support legs for mounting the workpiece.

This invention allows the formation of high quality screw turns with maximum deviations in increments of not more than 1 mm and deviations of the perpendicularity of the flanges to the axis of not more than 1 degree. The equipment is equipped with software that allows you to calculate the exact settings.

During the operation of the press, the workpiece, made in the form of a split ring, is repeatedly compressed and rotated between the dies, thus, the curvature specified by the plates is gradually transferred to the entire workpiece. Due to the precisely repeated movements of the press, the workpiece throughout, acquires the same curvature.

Thus, the advantages of the inventive machine are:

1. The absence of special measuring devices for setting up the equipment, the setting consists in installing pre-calculated forming plates on the matrix support in their seats, their further adjustment is not required. Next, support legs are installed depending on the required diameter.

2. To cover the production of all basic sizes, no more than sixteen hardened plates with the same value of side A are required, with an angle pitch β of two degrees. Such a small amount is associated with the absence of the need to install the workpiece perpendicular to the axis of movement of the moving part of the press. The calculation of the installation is to pre-calculate the installation angle of the workpiece relative to the axis of movement and further calculate the distance of the required shift.

3. Supporting supports 3 are mounted directly on the matrix support 4 and have the ability to adjust the outer diameter, regardless of the installed forming plates 2.

4. The central forming plate 1 is mounted rigidly on the support and is not regulated, obtaining turns with a flange non-perpendicular to the axis is achieved by adjusting the supporting supports 3.

Claims (1)

A machine for forming a coil of a spiral auger from an open-ring-shaped billet containing a base, a hydraulic press mounted thereon, having a hydraulic cylinder movable in the form of a slider and stationary parts of the press, characterized in that it is equipped with an oil station with a control unit comprising a control console connected through a hydraulic drive with a movable part of the hydraulic press to ensure movement of the press slider in the horizontal plane, matrix support plates mounted on the press are made in the form steel hardened plates in the form of isosceles triangles, with an angle between the sides of 40 to 80 degrees, selected depending on the required curvature of the screw auger, and landing grooves located along the sides of the triangle, a matrix made in the form of a set mirrored paired hardened side forming plates in the form of rectangular trapezoid, the oblique side of each of which is made with a sharpening angle that provides the necessary deformation of the part of the workpiece on which they act, and a central forming plate having a side B equal to the width of the central part of the side forming plate, and the height of the forming plates of the matrix is the same and equal to the height of the seating groove on the base plate of the matrix, support supports are installed on the supporting plates of the matrix to hold the workpiece in the desired position, made in the form height-adjustable brackets.

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