SU1560586A1 - Bending-hardening unit for manufacturing coil springs - Google Patents

Abstract

The invention relates to installations for the production of leaf springs from steels with regulated hardenability. The goal is to improve the quality of processing by ensuring uniform quenching along the length of the product and correcting the rib curvature. The installation includes a forming mechanism, which represents a bending and quenching press and consists of a bottom 1, top 2 dies, covered with a can. The upper die 2, the cover, the traverse are moved along the guides. The casing has sidewalls 14, in the lower part of which cuts are made for grippers 15, 16 and bevels 17 for placing the sheet in the center of the stamp 1, as well as for correcting (correcting) its rib curvature (crescent). The sides 14 have channels (grooves) 18, made against the spring sheet with the stamp closed. Channels 18 from the center of the can (refrigerant supply point) are narrowed in width and depth as they approach the drain holes (the periphery of the casing). The grippers 15 are designed to transfer a straight sheet (blank) 20 to the stamp 1 and are arranged in a straight line, and the grippers 16 are designed to remove the finished sheet 21 from the stamp 1 and are arranged in an arc with the curvature of the working surface of the stamps. The installation provides uniform hardness on the surface of the sheet along its entire length, as well as simultaneously with the flexible elimination of the rib curvature of the spring leaves. 6 Il.

Description

The invention relates to mechanical engineering, in particular, to devices for the production of spring sheets from steels with regulated hardenability.

The aim of the invention is to improve the quality of processing by ensuring uniform quenching along the length of the product and correcting the rib curvature.

Figure 1 presents the section on the mechanism of forming; 2 is a section A-A in FIG. with open stamp; on fig.Z - view B in figure 2; figure 4 - section aa in figure 1 with a partially lowered stamp before the departure of the grippers; figure 5 is the same, with a partially lowered stamp after leaving the grips; figure 6 - the same, with a fully closed stamp.

The bending and quenching machine includes a forming mechanism, to which sheets are fed from a conveyor using a sheet feeding mechanism. After punching by the same mechanism, with the help of grabs, the finished sheet is fed to the discharge conveyor.

The forming mechanism is a press bending and hardening and consists of a lower 1 and upper 2 dies and is closed by a casing 3.

The upper stamp 2 and the casing 3, as well as the yoke 4, are moved along the guides 5 having drain holes in the lower part. Traverse 4 is connected to the upper die 2 with the help of t g 6 and spacer springs 7 installed in the cups 8.

To regulate the degree of compression of the springs 7 and the pressing force of the upper

2 shtampa to the bottom 1 in the yoke 4 screwed bushings are screwed 9. casing

3 is connected to the crosspiece 4 through the gears 10 and the gears 11, the slats 12, made in conjunction with the guides

5 and casing rails 13 3. Casing 3 has

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five

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five

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sidewalls 14, in the lower part of which slots for grippers 15 and 16 are made and bevels 17 for placing the sheet in the center of the stamp 1, as well as for correcting (correcting) its rib curvature (crescent). The sidewalls 14 have channels (grooves) 18, as well as one of the sidewalls 14 — fitting 19 for supplying a refrigerant. Channels 1.8 are designed in such a way that they are against the spring sheet with the stamp closed. The channels from the center of the casing (refrigerant supply points) narrow in width and depth as they approach the drain holes (the periphery of the casing).

So with a spring sheet length of 1500 mm, a water flow rate of 12-15 m / s and a quenching temperature of 800-850 ° C, the total cross section of the channels 18 in the middle of the casing (water supply) is 1/3 of the total cross section of the chamber formed by dies 1 and 2 above and below sheet 21.

The heated workpiece 20 is fed to the bending press by grippers 15, and the molded and hardened spring sheet

21 is removed from the lower die 1 by the grippers 16.

There are clamps above the grippers 15

22 procurement 20. After processing, the finished sheet 21 from the stamp 1 is transferred to the conveyor 23 with stops 24. The grippers 15 are designed to be transferred to the stamp 1 of the straight sheet (blank) and are arranged in a straight line, and the grippers 16 are for removal from the stamp 1 finished sheet 21 and arranged in an arc (fig.Z). Grips 15 and 16 are rigidly connected to a U-shaped guide 25, inside of which a rail 26 is placed, connected through a link 27 with a clip 22, Clip 22 is attached to the guide 25 with a pin 28. A rail 26 is connected to a spring 25 29. Rails 26 move from rail 30

through the gears 31 mounted on the shaft 32f, the guide 25 rests against its end 33 with its end face. The heated blanks are supplied from the induction heating line, using rollers 34.

The installation works as follows.

From the line of induction heating

and therefore marriage. As you move away from the point of supply to the sheet area, fresh water is additionally supplied from channels 18, as a result of which

V

15 is ensured, the hardness on the surface of the sheet along the entire length is the same.

In addition, the curvature of the spring leaves is eliminated simultaneously with the flexible installation.

20

Claims (1)

Invention Formula The rollers 34 receive a set of stumps on the surface of the quenched sheet, wok 20, laid in one row of each other. The guide 25 rests with its end against the stop 33 of the rail 26, compressing the spring 29, lifting the clips 22 through the link 27; In order to feed the blanks into the die, the rail 30 moves downward and through the gears 31 with the shaft 32, the slats 26 are fed forward. Under the influence of the friction forces and the springs 29, the movement of the guides 25 is delayed for some time, and at this time the slats 26 clamp the workpieces 22 on the grippers 15. After clamping, the workpiece 20 is fed to the stamp zone, and the finished sheet 21 by the grippers 16 arranged in an arc is transferred to the conveyor 23, where the dogs 24 are removed from the grippers 16 and fed forward. In order to remove the workpiece 20, the traverse part 4 and the stamp 2 are lowered by a certain amount (in this case, 35 mm). Through the rods 10, the gears 11 and the laths 12 and 13, the casing 3 is lowered by a double value (70 mm). The grippers 15 are in the slots of the sidewalls 14 (Fig.4), then the grips 15 go back to their original position when the rail 30 moves upwards (Fig.5). Traverse 4, stamp 2 and cover 3 are lowered to the end (Fig. 6). When moving, the bevels 17 of the sidewalls 14 shift the workpiece to the middle of the stamp 1. Upon further movement, the workpiece is clamped between the sidewalls 14 and A bending and quenching unit for the manufacture of sheet springs, containing a forming mechanism with upper and lower dies, a device for correcting the rib curvature of spring sheets, conveyors, a sheet feeding and dispensing mechanism, which, in order to improve the quality of processing by uniform hardening along the length of the product and the correction of the rib curvature, the molding mechanism is made in the form of a side 35 wines with slots in their lower parts and refrigerant supply channels located in the middle of the sides, tapering to the periphery, rib-curvature correction devices 40 are made in the form of bevels in the lower part of the sidewalls, and the sheet feed and dispensing mechanism is made in the form of grippers; 45 the curvature of the working surface of the dies As a result, the rib curvature is edited with simultaneous flexible upper 2 and lower dies. At the end of the bending, water is supplied through the nozzle 19 under pressure so that the flow rate is not lower than 12 m / s, which makes it possible to eliminate the formation of a steam jacket and therefore marriage. As you move away from the point of supply to the sheet area, fresh water is additionally supplied from the channels 18, as a result of which V ensured, the hardness on the surface of the sheet along the entire length is the same. In addition, the curvature of the spring leaves is eliminated simultaneously with the flexible installation. on the surface of the hardened sheet, 20 zo Invention Formula A bending and quenching unit for the manufacture of sheet springs, comprising a molding mechanism with upper and lower dies, a device for correcting the rib curvature of spring sheets, conveyors, a sheet feeding and dispensing mechanism, characterized in that, with the aim of improving the quality of processing by uniform hardening along the length product and correcting the rib curvature, the molding mechanism is made in the form of sidewalls with slots in their lower parts and in the middle of the sidewalls channels for coolant supply, tapering to the periphery, VA to correct the rib curvature made in the form of bevels in the lower part of the sidewalls, and the mechanism for feeding and issuing sheets is made in the form of grippers, while the grippers of the issuance of sheets are arranged along an arc with a curvature equal to the curvature of the working surface of the stamps. Type B I Lini ras for l about we- Lini is located ... fe neither the grips of W nor the grips of 5 W Fig. 3 25 but 25 4Sh "ZhGSh 0 7 ////////////////////////////////////////// 7771 FAL AiA  /////////////// AS ////////////////. FIG. 6 Editor T. Lazorenko Compiled K). Ushaty Tehred M. Didyk Order 953 Circulation 509 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101 Proofreader S. Shekmar Subscription