RU2190490C2 - Shape bending machine - Google Patents

Abstract

FIELD: plastic metal working, possibly manufacture of shapes of wide range of materials in machine engineering. SUBSTANCE: machine includes mounted according to technological successive procedures: stand for preliminarily shaping and driven profiling stands. Shafts are mounted in all stands by cantilever fashion and they may be separately moved in vertical plane at holding their rotation drives. Free ends of shafts are closed by means of removable stirrups. Roller pairs have closed profiling gap; they are based along vertical and horizontal mounting surfaces of rollers. EFFECT: enlarged manufacturing possibilities, improved quality of ready shapes, reduced time period for readjustment. 4 dwg

Description

 The invention relates to the processing of metals by pressure, in particular to the manufacture of profiles from sheet blanks by profiling in rolls, and can be used in mechanical engineering in the manufacture of profiles from a wide range of materials.

 The claimed invention is aimed at solving the national economic problem, which consists in expanding technological capabilities in the manufacture of profiles from sheet blanks of various materials.

 A device according to A.S. 1207557 USSR IPC B 21 D 5/06 for the manufacture of bent sheet profiles, comprising non-driven forming and drive pulling stands installed on a bed in an alternating order with shaped rollers placed on shafts one above the other to form a closed gauge in which the drive gears have an unequal number teeth, there is a bending-calibration unit, located behind the last pulling stand, equipped with profiled rollers, the shafts of which are placed with the possibility of movement in arcuate concentric located Zech formed in the housing, the lower roller is driven, and the interaxial distance pulling stands unequal.

The disadvantages of this analog can be considered:
- the inability to adjust the center-to-center distance between the upper and lower shafts, which limits the technological capabilities of the device;
- profiled rollers are located on the cantilever ends of the shafts, while reducing the rigidity of the shafts, which affects the quality of the profiles;
- the great complexity of establishing the necessary clearance between the profiled rollers due to the lack of basing of the surfaces of the rollers.

 Also known roll forming mill according to A.S. 1172627 USSR IPC B 21 D 5/06 for profiling sheet blanks, containing working stands connected to the drive with work rolls, the upper of which are mounted with the possibility of vertical movement, a series of worm gearboxes, each low-speed shaft of which is connected to the work rolls by means of a gear transmission, each gearbox is equipped with a removable shaft. One of the gears of the cylindrical gear is mounted on this shaft, the shaft being connected to the upper work roll of the mill stand. In addition, the mill is equipped with an arm pivotally connected to the shaft, mounted on the gear case with the possibility of its adjustment in height.

The above analogue has the following disadvantages:
- the inability to move the lower working shaft;
- the upper shaft moves only to a certain height equal to the thickness of the gasket, which reduces the range of regulation, because step adjustment;
- when changing the height of the upper shaft, it is necessary to replace the gears of the cylindrical gear.

 All of the above makes the changeover of the mill time-consuming, requiring a long time.

 A roll forming machine according to the patent of the Russian Federation 2028847 IPC B 21 D 5/06 is also known, containing drive forming stands installed in the technological sequence for preliminary and final shaping with roller pairs having a closed profiling gap. The pre-forming stand is equipped with an overrunning clutch. The minimum distance between the forming stands is set by a mathematical dependence. This machine is accepted by us as a prototype.

The prototype and the claimed invention have the following similar essential features:
- drive forming stands for preliminary and final shaping are installed in the technological sequence;
- roller pairs are mounted on shafts and have a closed profiling clearance.

The disadvantages of the prototype is the following:
- a long changeover time of the machine due to the need to tightly control the center distance;
- the inability to set a high-precision gap between the pairs of forming rollers and its stable preservation during operation.

 All of the above significantly reduces the technological capabilities of the prototype.

 The technical problem solved by this invention is to expand the technological capabilities of the machine, increasing convenience and reducing the time of its readjustment.

This problem is solved by a combination of existing and new significant features. New significant features:
- the shafts on which the roller pairs are located are mounted with the possibility of moving in a vertical plane independently from each other while maintaining the rotation drive on them;
- the shafts of all stands are fixed cantilever, and their free ends are closed by a removable earring;
- the base of the roller pairs is made on the vertical and horizontal mounting surfaces of the rollers.

The following technical result is obtained:
- the ability to offset the axis of the profiling in the vertical plane allows you to create tension or compression stress in the elements of the profile between the stands, which increases the degree of deformation;
- the earring provides power closure of the roller pairs for guaranteed installation of a closed profiling clearance and its preservation during operation;
- quick change of the tool while ensuring a high-precision setting of the gap between the pairs of forming rollers significantly reduces the time of readjustment of the machine.

 All this allows you to significantly expand the technological capabilities of the machine.

 Figure 1 shows a roll forming machine; figure 2 is the same plan; in FIG. 3 - section AA - the location of the forming rollers on the shafts; figure 4 - section bB - section of the profile stand 3.

 The roll forming machine contains a bed 1, to the guide rails which can be moved left-right and up-down, a preliminary forming crate 2 is attached. On the bed 1, profiling stands 3 are installed in the technological sequence 3. Work shafts - upper 4 and lower 5 - in each profiling stand fixed cantilever and can move in a vertical plane independently of each other while maintaining the rotation drive on them. The free ends of the working shafts 4 and 5 are closed by a removable earring 6. The drive 7 provides the rotation of the shafts 4 and 5. Forming rollers are installed on the working shafts 4 and 5: upper 8 and lower 9, forming a roller pair having a closed profiling clearance. The roller pairs are based on the vertical and horizontal mounting surfaces of the rollers 8 and 9.

 Behind the profiling stands 3, a receiving device 10 is installed.

 The machine operates as follows.

 Corresponding rollers are mounted on the shafts of the preliminary forming stand 2 and the profiling stand 3.

 Before starting work, the machine is configured to produce a specific profile.

 The cage of preliminary shaping 2 with the help of adjusting screws is set to a predetermined position of the axis of profiling in horizontal and vertical planes, and its shafts at the required center-to-center distance between the rollers.

 The upper working shaft 4 and the lower working shaft 5 in each profiling stand 3 are also set along the axis of profiling, as they have the ability to move in a vertical plane. Moreover, the movement of the upper working shaft 4 is carried out by rotating the control shaft (not indicated) through a system of gears and a screw, which is possible without turning off the drive. Moving the lower working shaft 5 is carried out by a wedge driven from another control shaft (not indicated) through a bevel gear with a threaded connection, and the drive is not required to be disconnected. Torque to the working shafts 4 and 5 is transmitted from the drive 7 through a V-belt drive, a gearbox and a system of gears. The upper working shaft 4 is lowered until the seats of the upper 8 and lower 9 rollers touch. Thus, the basement of roller pairs on vertical and horizontal surfaces is ensured. After that, the free ends of the working shafts 4 and 5 are closed with a removable earring 6.

 Forming is carried out as follows.

 The workpiece is fed into the preliminary forming crate 2, then into the roller pairs of the profiling stands 3. The roller pairs of each stand have a guaranteed closed profiling gap and the calculated bending angles in each pair. Moreover, due to the basing of the roller pairs, the guaranteed closed profiling clearance and the calculated bending angles are stably maintained during the entire operation and do not require adjustment. Next, the finished profile is fed to the receiving device 10.

 Thus, the possibility of moving the working shafts in a vertical plane while maintaining the rotation drive on them allows the use of roller pairs with different interaxal distances and to produce profiles of various configurations from a wide range of metals and alloys. The cantilever fastening of the working shafts increases the convenience of servicing the machine and reduces the complexity and time for changing the machine to another profile size. The closure of the free ends of the working shafts with an earring provides rigidity and parallelism of the shafts during operation.

 The base of the rollers among themselves on their mounting surfaces provides a guaranteed closed profiling clearance, allows you to get high quality profiles, eliminates errors caused by the setup of the machine.

 At our enterprise, a series of roll forming machines GPS-300M6, GPS-400M6, GPS-500M6, on which high-quality profiles are manufactured, was developed, manufactured and put into operation at the enterprises of the industry.

 The inventive roll forming machine does not adversely affect the environment.

Claims (1)

 Profile bending machine for the manufacture of bent profiles, comprising a cage for pre-shaping and drive profiling cages with roller pairs mounted on working shafts with a closed profiling gap, characterized in that each cage is equipped with a removable earring, roller pair rollers have vertical and horizontal mounting surfaces, working shafts are fixed cantilever with the ability to move in a vertical plane independently of each other uga without disconnecting drive their rotation and force closure of the free ends of the removable lug after the basing roller pairs at their mounting surfaces.

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