RU2028843C1 - Device for the blank supply - Google Patents

Abstract

FIELD: tube rolling industry. SUBSTANCE: device has mechanisms of axial displacement of the mandrel rod and of the blank disposed on frame 1. The former is made in the form of power cylinder 2 placed on platform 11, cartridge 3 connected with it and shifted in the platform guides and chain 5 whose ends are fastened on cartridge 3 with bearing members for the mandrel. The second mechanism is made in the form of additional power cylinder 14 connected with platform 11 and chain 16 whose ends are fastened on the front face end of platform 11 with bearing members 21 and prop 22 of the blank. The fact that the mechanisms of the mandrel rod and the blank displacement not connected between themselves have individual displacement drives allows to regulate the speeds of displacement of the mandrel rod, of the blank with the mandrel rod and the speeds of displacement of the blank relative to the mandrel rod. EFFECT: improved conditions of the grip of blanks having different size and mass. 7 dwg

Description

 The invention relates to the processing of metals by pressure and relates to the design of the supply devices of the rental. Most effectively, the invention can be used in cross helical rolling mills when rolling pipes on a held movable mandrel.

 A device is known for the task of procuring a tube rolling mandrel [1], comprising a wire mechanism for axial displacement of the mandrel, a mechanism for moving a sleeve with a mandrel in the form of a trolley with rollers and a trough, rotary hooks connected to each other with the ability to engage and disengage by means of a profile stop.

 The task of the sleeve in the rolls is carried out due to the friction forces of the sleeve along the movable groove and mandrel. However, their value may not always be sufficient to create the necessary effort for the task of shells of various masses and sizes, which worsens the conditions of capture and leads to its instability.

 The closest in technical essence to the invention is a device for feeding blanks [2], containing a mechanism for axial movement of the mandrel in the form of a hollow carriage mounted on the stationary guides and a drive pusher rigidly connected to the mandrel, and a mechanism for moving the workpiece, consisting of an endless thread with the fixed along its perimeter supporting elements. The thread of the mechanism is installed parallel to the axis of rolling and is connected to the carriage.

 A disadvantage of the known design of the device for feeding blanks is that the presence of one drive connected to the pusher and the mandrel ensures the movement of the workpiece with the charging speed of the mandrel. This when changing the size and mass of the workpieces leads to instability of the capture conditions due to the inability to control relative to each other the speeds of movement of the mandrel and the workpiece.

 The aim of the invention is to improve the capture conditions of the workpiece.

 This is achieved by the fact that the device for supplying a workpiece containing a mechanism for axial movement of the mandrel placed on the frame, the mechanism for moving the workpiece in the form of a chain with support elements for the workpiece, according to the invention is equipped with a platform movable in the provided frame guides with guides made in it, the mechanism of axial movement of the mandrel made in the form of a power cylinder mounted on the platform, on the rod of which a cartridge is connected connected to the mandrel, and the cartridge is installed in the guide plates forms with the possibility of movement along them and the ends fixed on the cartridge chuck with support elements under the mandrel, while the workpiece movement mechanism has an additional power cylinder, the rod of which is connected to the platform, and an emphasis rigidly fixed to the chain of this mechanism, the ends of which are fixed at the front end platforms.

 Such a structural embodiment of the device for feeding blanks will provide the ability to control the speeds of movement of the mandrel, the workpiece with the mandrel and the speed of movement of the mandrel, the workpiece with the mandrel and the speed of movement of the workpiece relative to the mandrel, which will improve the gripping conditions of the workpieces of various sizes and weights.

 This is achieved by performing mechanisms for moving the mandrel and the workpiece that are not interconnected, according to the claims, with individual drives for moving them.

 In FIG. 1 shows a device for feeding blanks, plan; figure 2 is the same in the charging position of the mandrel; figure 3 is the same in the rolling position; figure 4 is a section aa in figure 1; figure 5 is a section bB in figure 4; in FIG. 6 is a section bb in FIG. 4; in Fig.7 is a section GG in Fig.4.

 The device for supplying the workpiece contains placed on the frame 1 parallel to the axis of the rolling mechanism of the axial movement of the mandrel and the movement of the workpiece.

 The axial movement of the mandrel is made in the form of a power cylinder 2 connected to the cylinder rod of the cartridge 3, in the spindle 4 of which the mandrel is fixed, and chains 5, the ends of which are fixed on the cartridge 3, and the branches are thrown through sprockets 6 and 7 mounted on the uprights 8 and 9.

 The cylinder 2 is placed on the platform 11 installed in the guides 10 of the frame, in the guides 12 of which the cartridge 3 moves. Along the perimeter of the chain 5, support elements 13 are fixedly mounted under the mandrel, resting their ends on the guides 12 of the platform.

 The mechanism for moving the workpiece is made in the form of an additional power cylinder 14 mounted on the frame 1 and connected by an axis 15 to the platform 11, and a chain 16, the ends of which are fixed on the front end of the platform, and the branches are thrown through asterisks 17 and 18 installed in racks 19 and 20 moreover, one of them 20 is placed directly at the working stand. Along the perimeter of the chain 16, support elements 21 are rigidly mounted, resting at their ends on the guides 10 of the frame. In addition, on the chain 16 is fixedly fixed stop 22 for the workpiece on the line of the front dimension of the workpiece.

 The device operates as follows.

 In the initial position, the chuck 3 with the mandrel is in the extreme rear position, the supporting elements 21 of the workpiece moving mechanism are located under the rolling axis over the entire length of the workpiece, and the workpiece stop 22 is in the raised position.

 After loading the workpiece onto the support elements 21 of the workpiece moving mechanism, the cylinder 2 of the mandrel moving mechanism is turned on. Associated with it, the cartridge 3 with the mandrel moves along the guides 12 of the platform 11 to the workpiece and the mandrel is introduced into the inner hole of the workpiece. The emphasis 22 of the workpiece holds it from possible movement along the supporting elements 21.

 The mandrel is introduced into the workpiece at increased speeds (V ≈1 m / s). As the mandrel is inserted into the workpiece, the mandrel support elements 13 located on the chain 5 of the mandrel moving mechanism are lowered alternately, making it possible to move the cartridge with the mandrel to the working stand.

 At the moment of exit of the nose of the mandrel from the workpiece, the cylinder 14 of the workpiece moving mechanism is turned on. The platform 11 connected to it and the chain 16 fixed to it with the supporting elements 21 and the workpiece stop 22 begin to move. In this case, the stop 22 is lowered, and the mandrel with the workpiece at an increased speed (V = 1 m / s) is brought to the deformation zone. Then, 200-300 mm from the deformation zone, the mechanisms switch to a reduced speed (V = 0.1-0.3 m / s), providing small dynamic loads on the working stand and stable workpiece capture by rolls.

 At the moment of capture of the workpiece by the rolls, the mechanisms switch to the operating modes of rolling, while the speeds of movement of the mandrel and the workpiece are determined by the specified technological modes of rolling. All necessary speed modes are carried out by adjusting the speeds of the cylinder rods of the mandrel moving mechanism and the workpiece moving mechanism.

 At the end of the rolling process, the mechanisms for moving the mandrel and moving the workpiece with a reverse stroke of 2.14 cylinders return to their original position.

 This device for feeding blanks in comparison with the known allows to improve the conditions for the capture of blanks of various sizes and weights.

Claims (1)

 DEVICE FOR SUBMISSION OF PREPARATIONS, comprising a mechanism for axial movement of the mandrel located on the frame, a mechanism for moving the workpiece in the form of a chain with support elements, characterized in that it is equipped with a platform with guides made therein, installed in the respective frame guides, the mechanism of axial movement of the mandrel is made in the form a power cylinder, on the rod of which a cartridge is connected connected to the mandrel, the cylinder mounted on the platform, and the cartridge in the guides of the platform with the ability to move along m, and chains with supporting elements, the ends of which are fixed on the cartridge, while the workpiece movement mechanism has an additional power cylinder, the rod of which is connected to the platform, and an emphasis rigidly fixed to the chain of this mechanism, the ends of which are fixed on the front end of the platform.

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