RU235303U1 - MANUALLY OPERATED METAL BENDING MACHINE - Google Patents

Abstract

The utility model relates to mechanical engineering. A device for bending metal blanks comprises a frame, a support plate secured to the frame with bolts, a support column mounted on the support plate, with a base for installing the main and auxiliary templates secured with bolts and pins, a bending element mounted on a lever with the ability to rotate around the support column. A radial-thrust bearing is mounted on the support column. A lever made with a removable extension is secured to the outer race of the radial-thrust bearing. The bending element is made in the form of three radial bearings that ensure smooth interaction with the blank, and a spacer sleeve. The technical result of the utility model is the ability to bend metal blanks at an angle greater than 810° while simplifying the design of the device. 5 fig.

Description

The utility model relates to the field of mechanical engineering, in particular to metal pressure processing, and can be used for bending square and round cross-section pipes, including for making curls, monograms, or blanks for a loop pulse tube for control and measuring instruments.

A device for bending profile pipes is known (RU 104102 U1, class B21D 7/02, published 10.05.2011), which includes a working template fixed on a faceplate having holes for installing auxiliary templates. The device also has a bending element, which is fixed relative to the axis from rotation and installed above the faceplate. The bending element has the ability to be adjusted in the longitudinal direction through a guide fixed on the frame.

The disadvantage of this device is that the faceplate is driven by an external drive, which makes the design more complex and less mobile.

A device for bending profile pipes is known (RU 2365450 C1, class B21D 7/02, published 27.08.2009), which includes a template with a working surface, a groove and a punch for fixing the workpiece, a bending element installed on an axis, and a lock preventing the bending element from turning during operation. The template is fixed on a faceplate equipped with holes for installing auxiliary templates that allow bending various workpieces. The bending element is adjusted along a guide, which provides the ability to move longitudinally and adjust the process.

The disadvantages of the device include the need for an external drive, the need for preliminary processing of the workpiece, as well as deformation of the end of the workpiece by the punch, which leads to an increase in material consumption during trimming.

The closest analogue - prototype in relation to the claimed utility model is a device for bending strips and pipes (USSR Author's Certificate No. 940915, class B21D 7/02, published in 1980) containing a rotary axis, a template installed on it, and copiers equidistant from the working surface of the template. The bending roller interacts with the copiers, providing bending of metal at an angle of more than 450°, which expands the technological capabilities of the device. The design includes a movable part of the template installed in a curvilinear groove, which allows for spiral bending and other complex operations with metal blanks.

The disadvantage of this device is the bending angle, limited to 450°, and the precision of manufacturing the working grooves and the sliding template, complicates the manufacturing process of the device.

The task that the utility model is aimed at solving is the creation of a mobile and universal device that provides bending of metal blanks at an angle of more than 810°, the design of which allows its manufacture in conditions of small production capacities.

The technical result is the ability to bend metal blanks at an angle greater than 810° while simplifying the design of the device.

The specified technical result is achieved due to the design of the device, including a frame, on which a support plate in the form of a disk is fixed with bolts. In the center of the support plate, a support post is welded, on which a radial-thrust bearing is also installed by welding. On the outer race of the bearing, using electric arc welding, a lever with a bracket is fixed, on which a bending element in the form of three rolling bearings is installed. On the upper part of the support post, a base for a template is welded, equipped with holes for installing the main and auxiliary templates.

Fig. 1 - general view of the device;

Fig. 2 – top view;

in fig. 3 – top view without templates;

Fig. 4 – top view during the bending process of the workpiece;

Fig. 5 – section A-A of Fig. 2.

A device for bending metal blanks with a manual drive contains a frame 1, on which a support plate 3 in the form of a round metal disk is secured with bolts 2. In the center of the support plate 3, a support column 4 is welded. A radial thrust bearing 5 is installed on the support column 4, to the outer race of which a lever 6 is welded. A removable extension 7 is provided to increase the length of the lever 6. A bracket 9 is secured to the lever 6 using a clamp 8, on which a bending element 12 is installed using an axis 10 and a nut 11. A template base 13 with holes 14 for fastening the main template 15 and auxiliary templates 16 and 17 is welded to the upper part of the support column 4. Auxiliary templates 16 and 17 are held in holes 14 using pins 18. Template 15 is secured to the base of template 13 with bolts 19. Template 15 has a groove 20 for fixing the workpiece 21. Bending element 12 consists of three radial bearings. 22, 23, 24 and spacer sleeve 25. On bracket 9 there is a groove 26 for adjusting the extension of bending element 12.

The device works as follows.

One end of the workpiece 21 is fixed in the groove 20 of the template 15. The lever 6, equipped with a removable extension 7 for increasing the leverage, rotates around the support post 4 due to the bearing 5. The bending element 12, mounted on the bracket 9, interacts with the workpiece 21, gradually bending it at the desired angle. To perform more complex bending shapes, auxiliary templates 16 and 17 can be used, which are installed on the base of the template 13 in specially provided holes 14.

As a result of the proposed utility model, it is possible to bend metal blanks using a manual drive without an external power source, which increases the mobility and autonomy of the device. The presence of a removable lever extension increases the leverage, which allows applying sufficient force for bending, and due to its removable design, the overall dimensions of the device are reduced, which facilitates its transportation and storage. A radial thrust bearing mounted on a support post ensures smooth rotation of the lever, reducing resistance and increasing bending accuracy. A template with a groove securely fixes the blank, preventing its displacement during operation, and additional auxiliary templates expand the functionality of the device. The simplicity of the design allows the device to be manufactured under conditions of limited production capacity, which confirms the achievement of the declared technical result.

Claims (1)

A device for bending metal blanks, comprising a frame, a support plate secured to the frame with bolts, a support post mounted on the support plate, with a base for installing the main and auxiliary templates secured with bolts and pins, a bending element mounted on a lever with the ability to rotate around the support post, characterized in that a radial thrust bearing is mounted on the support post, on the outer race of which a lever is secured, made with a removable extension, and the bending element is made in the form of three radial bearings, ensuring smooth interaction with the blank, and a spacer sleeve.