RU2207928C2 - Device for spatial bending of rod-type blanks - Google Patents

Abstract

FIELD: pressure shaping; bending rod-type blanks in two planes; manufacture of automobile stabilizers. SUBSTANCE: proposed device is provided with units for bending blank in first plane which are made in form of templates and bending tools mounted on drive supports installed on bed frame for motion along axis of blank. Device is provided with die for bending the blank in second plane located at angle relative to first one. Press is provided with die having female member consisting of fixed middle part and extreme movable parts. They are secured on supports resting against bed frame of press. Templates are used for pressing the ends of blank to movable parts of female die. Press is mounted for turn around axis of blank, thus ensuring bending of blank without thinning of sections being bent and with no change in angle between planes of bending. EFFECT: enhanced efficiency. 2 cl, 7 dwg

Description

 The invention relates to the processing of metals by pressure and can be used for bending in two planes of various rod blanks, for example in the manufacture of automobile stabilizer rods.

 A device for bending core blanks in two planes according to ed. testimonial. USSR 860908 (published 07.09.81), containing bending nodes in the first plane, made in the form of templates and bending tools, as well as bending nodes in the second plane. The device first bends the workpiece in one plane around the templates, and then bends are turned on in another plane around the mandrels. This device is the closest to the offer.

 The known device does not provide bending of the middle part of the workpieces, but produces only bending of its ends, in which with one tool only one bend can be obtained in one stroke, with the inevitable stretching and, consequently, thinning of the bent section. In addition, it does not allow changing the angle between the bending planes.

 The present invention solves the problem of providing the possibility of bending the middle part of the workpieces without thinning the bending sections, as well as the possibility of changing the angle between the bending planes.

 To achieve this technical result, in a device for spatial bending of core blanks, comprising bending units mounted on the bed in the first plane, made in the form of templates and bending tools, and a bending unit in the second plane, the latter is made in the form of a press equipped with a die, the matrix of which is made integral with two movable parts, and the bending nodes in the first plane are mounted on drive calipers mounted on the bed with the ability to move along the axis of the workpiece and equipped with media by means of clamping the workpiece to the movable parts of the matrix, which are fixed on the said supports with support on the bed of the press. The press is mounted to rotate around the axis of the workpiece.

 Distinctive features of the proposed device for spatial bending of core blanks from the above known, closest to it, is the implementation of the bending unit in the second plane in the form of a press, the stamp of which contains a composite matrix with two movable parts. The bending nodes in the first plane are mounted on drive calipers mounted with the possibility of movement along the axis of the workpiece. The moving parts of the matrix are also fixed on these calipers, which are equipped with means for clamping the workpiece to the moving parts of the matrix. In addition, the press is mounted to rotate around the axis of the workpiece.

 Due to the presence of these signs, when operating the device for spatial bending of core blanks, the press bends the middle part, while the drive supports, on which the ends of the workpiece are fixed, move towards each other together with the moving parts of the matrix. Due to this, stretching, and consequently, thinning of the workpiece in bent sections, is prevented. By changing the angle of the press, you can adjust the angle between the bending planes.

 The proposed device for spatial bending of rod blanks is illustrated by the drawings shown in figures 1-7.

 Figure 1 shows a General view of a device for the spatial bending of the stabilizer bar of a car.

 Figure 2 is a section aa in figure 1.

 Figure 3 is a view B of figure 2 (part of the rear view of the device).

 Figure 4 - stabilizer bar.

 Figure 5 - schematically the movement of the clamps-templates, clamp the rod.

 Figure 6 - schematically flexible the ends of the rod.

 Figure 7 - schematically bending the middle part of the rod.

 A device for spatial bending of core blanks contains a frame 1 with pedestals 2, on the guides of which are mounted calipers 3 (Fig. 1). A press is mounted in the frame 1, the casing 4 of which is mounted on the circular guides 5 of the frame 1, while the axis of the circular guides 5 coincides with the axis of the direct workpiece. A power cylinder 6 is fixed to the press body 4, the rod of which moves the slider 7 with a bending tool 8, which is a punch of the bending stamp of the middle part of the rod. The matrix (lower part of the stamp) is made of three elements. The middle element 9 is fixedly mounted on the housing 4, and two extreme elements 10 with streams corresponding to the shape of the middle part of the rod are fixed on the calipers 3 and the supporting surfaces of their cantilever parts 11 are supported on the supporting surfaces 12 of the fixed element 9. The angular position of the press body 4 can be adjusted to obtain the required angle between the bending plane of the middle part and the bending plane of the ends of the rod using the lead screw 13, nut 14 and cable 15, connected at one end to nut 14, and the other to the housing 4. Housing 4 fix is screwed 16, inserted into the grooves 17 of the frame 1, which are made along the radius with the center aligned with the axis of the circular guides 5 (figure 2).

 The calipers 3 having a mirror design are mounted on the guides 18 of the curbstones 2 with the possibility of reciprocating movement from the cylinders 19. The working position of the calipers 3 is determined by the emphasis of the ends 20 of the consoles 11 of the movable elements 10 against the ends 21 of the fixed element 9. The gap between the ends 20 and 21 depends on the magnitude of the bend of the middle part of the rod and is regulated by thrust screws 22, which determine the initial position of the calipers 3 (Fig.3, 5). On the calipers 3 in the rails 23 vertically installed sliders (not shown) with clamps 24 mounted to them driven by cylinders 25. On the calipers 3 are also installed mechanisms for bending the ends of the rod in a vertical plane, consisting of rotary shafts 26 with fixed to them bending tools 27 and with rack drive from cylinders 28, and stops 29 for orienting the direct workpiece.

 The device operates as follows.

 Before starting work, the device is adjusted to the required part, for example, according to special standards. The heated direct billet is placed in the streams of the extreme elements 10 of the stamp matrix with centering on the stops 29, after which the drive cylinders 25 of the sliders with clamps-templates 24 are turned on, which press the workpiece to the movable elements 10 of the matrix (Fig. 5). The cylinders 28 rotate the shafts 26 with bending tools 27, bending the ends of the workpiece around the clamps-templates 24 at a given angle in the vertical plane (Fig.6). Then the cylinders 6 and 19 are simultaneously turned on, and the pressure in the cylinders 19 is adjusted to a value capable of developing a force on the rods of these cylinders that is sufficient to overcome the frictional forces when the calipers move to the center of the device, but less than the critical stability force of the rectilinear section of the workpiece located between the clamps -patterns 24. With the movement of the bending tool 8, until the start of bending the middle part of the rod, the calipers 3 are stationary, but as soon as the tool 8 begins to bend the middle second part preform slides 3 together with the movable elements 10 of the matrix and the die are located on mechanisms begin to move toward the center of the device, producing bending the middle portion of rod before the closure stamp (7). Bending is done without stretching, and therefore without thinning of the bent sections.

 After bending, all mechanisms, with the exception of calipers 3, return to their original position. The finished part is removed, and only after that the calipers move apart to their original position.

 The proposed device allows you to make the stabilizer bar of the car without changing the cross section in the bending areas, and by changing the tool and changing the angle of the press to produce rods of various designs on one bending machine, which is especially effective on production lines with serial production of various nomenclature.

Claims (2)

 1. A device for spatial bending of core blanks, comprising bending units mounted on a bed in the first plane, made in the form of templates and bending tools, and a bending unit in the second plane, characterized in that the bending unit in the second plane is made in the form of a press equipped with a stamp the matrix of which is made integral with two movable parts, and the bending nodes in the first plane are mounted on drive calipers mounted on the bed with the ability to move along the axis of the workpiece and equipped with E blank holder to the moving parts of the matrix, which are fixed on said support with a support on the machine frame of the press.  2. The device according to claim 1, characterized in that the press is mounted to rotate around the axis of the workpiece.

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