CN2460237Y

CN2460237Y - Cold-temp. extruding profiling die of internal-external circul helical gear

Info

Publication number: CN2460237Y
Application number: CN 00266599
Authority: CN
Inventors: 武金有
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-12-26
Filing date: 2000-12-26
Publication date: 2001-11-21
Anticipated expiration: 2010-12-26

Abstract

The utility model relates to a cold-temperature extruding profiling die of internal and external circular helical gears, which comprises an upper die and a lower die, wherein the upper die is composed of an upper die holder, a convex die, a fixing holder, and a bearing, and the lower die is composed of a lower die holder, a bearing, a supporting block, a concave die and a limiting rod. The utility model realizes the purpose that the compacting by extrusion method is adopted for processing the internal and external circular helical gears, and solves the motor coordination relationship between roughcasts and the convex die when helical gears are shaped by using a bearing structure skillfully. The utility model has the advantages of simple structure, reasonable design, low cost, and long service life, and is particularly suitable for the die manufacture of metal helical gears and plastic helical gears, and the rifling manufacture of cannon tubes and gun tubes.

Description

The helical gear cold warm-extrusion forming mould of inside and outside circle

The utility model belongs to extrusion molding apparatus, is specifically related to the helical gear mold for extruding and forming of a kind of inside and outside circle.

Gear is to form the most basic part of machine driving, and range of application is extremely wide.In machine driving, because helical gear meshing efficiency height, noise is low and used in a large number; The interior rifling processing of the gun tube of various weapons, gun barrel is also similar with internal helical gear in the national defense industry; The die of plastic beveled wheel also belongs to internal helical gear.Helical gear is processed as the master with machine cut at present, and it is many to expend man-hour, and using rate of metal is low, and the cost height needs following process processing etc., and the metal inside streamline is cut off after the machining in addition, and the mechanical performance of gear is reduced.If adopt cold warm-extrusion forming method processing helical gear, can improve the mechanical performance of part, improved the fatigue life of part greatly, but koldflo only is used for the processing of spur gear at present, because helical gear cold-extrusion technology complicated processing difficulty, domestic do not have successful experience as yet, existing still among exploratory development.

The purpose of this utility model provides the helical gear cold warm-extrusion forming mould of a kind of inside and outside circle, cold warm extrusion pressure technology is used for the rifling processing of the mould manufacturing of metal gear, plastic gear and gun tube, gun barrel.Its technology is simple, high efficiency, and processing cost is low, can significantly improve the service life of part.

Technical solution of the present utility model is: the helical gear cold warm-extrusion forming mould of inside and outside circle comprises upper die and lower die two parts, patrix is made up of upper bolster, punch, holder, bearing, bearing is contained in the lower end of holder, punch is arranged on holder and bearing centre, punch top is fixed in the upper bolster, back-moving spring and retainer spring are housed between upper bolster and holder, and upper bolster is connected by connecting rod with holder; Counterdie is made up of die shoe, bearing, back-up block, die, limit rod, and bearing is contained in the die shoe, and back-up block is contained in the bearing, and die case is contained on the back-up block, and limit rod is arranged in the endoporus of back-up block, and spring is equipped with in the limit rod lower end.

During work; blank is placed in the die; blank can be selected the various metal materials that plasticity is better, resistance of deformation is not high for use; in the forcing press course of exerting pressure, punch obtains the length feed motion, and self does not rotate punch; under the effect of deformation force; by the bearing under the back-up block, punch makes blank obtain rotation relatively, thereby makes the blank internal circular surfaces be squeezed into helical gear.In order to prevent that blank from clamp-oning the blank centre bore, the utility model adopts limit rod and punch lower end to be adjacent to all the time, piles up to prevent blank, and helical gear is shaped smoothly, ensures the quality of products.After the helical gear moulding; rely on the back-moving spring between upper bolster and the holder and the effect of retainer spring during backhaul, the relative punch of holder obtains rectilinear motion, be supported on the patrix bearing blank relatively punch rotate freely; punch withdraws from from formed gear, finishes a course of work.

Further describe the utility model below in conjunction with accompanying drawing:

Accompanying drawing is the helical gear cold warm-extrusion forming mould structure schematic diagram of inside and outside circle.

Wherein: 1, go up cushion block 2, upper bolster 3, punch 4, holder 5, bearing 6, blank 7, limit rod 8, die 9, back-up block 10, bearing 11, lower cushion block 12, spring 13, nut 14, fixed head 15, retainer spring 16, connecting rod 17, back-moving spring 18, die shoe

As shown in the figure, upper bolster 2 is fixed on the crossbeam of forcing press, and punch 3 is contained in the upper bolster 2, and cushion block 1 is equipped with on its top, and the working portion of punch 3 is according to required helical gear process parameters design; Bearing 5 is contained in holder 4 bottoms, and fixing by fixed head 14; Upper bolster 2 is connected by connecting rod 16 with holder 4, and connecting rod 16 lower ends are fixing with nut 13, and retainer spring 15 is housed on the connecting rod 16, between upper bolster 2 and holder 4 back-moving spring 17 are housed also.

Die shoe 18 is fixed on the workbench of forcing press, and bearing 10 is contained in the die shoe 18, and back-up block 9 is contained in the bearing 10, lower cushion block 11 is equipped with in back-up block 9 lower ends, die 8 is sleeved on the back-up block 9, and limit rod 7 is arranged in the centre bore of back-up block 9, and spring 12 is equipped with in limit rod 7 lower ends.

For mould structure is simplified more, above-mentioned limit rod and punch bottom can be connected as a single entity.

Above-mentioned bearing all adopts thrust ball bearing.

The utility model has been realized the method processing helical gear with extrusion molding, utilizes bearing arrangement dexterously, the motor coordination relation when having solved the helical gear shaping between blank and the punch, and it is simple in structure, and is reasonable in design, and processing cost is low, and service life of gear is long.Mould structure of the present utility model can be used for the inside and outside circle helical gear processing of various profiles of tooth such as involute, triangle, rectangle, the thickness of gear can be unrestricted, is particularly suitable for the rifling processing and manufacturing of the mould manufacturing of metal helical gear, plastic beveled wheel and gun tube, gun barrel.

Claims

1, the helical gear cold warm-extrusion forming mould of a kind of inside and outside circle, comprise upper die and lower die two parts, it is characterized in that patrix is made up of upper bolster, punch, holder, bearing, bearing is contained in the lower end of holder, punch is arranged on holder and bearing centre, punch top is fixed in the upper bolster, and back-moving spring and retainer spring are housed between upper bolster and holder, and upper bolster is connected by connecting rod with holder; Counterdie is made up of die shoe, bearing, back-up block, die, limit rod, and bearing is contained in the die shoe, and back-up block is contained in the bearing, and die case is contained on the back-up block, and limit rod is arranged in the endoporus of back-up block, and spring is equipped with in the limit rod lower end.

2, the helical gear cold warm-extrusion forming mould of inside and outside circle according to claim 1 is characterized in that above-mentioned limit rod and punch bottom are connected as a single entity.

3, the helical gear cold warm-extrusion forming mould of inside and outside circle according to claim 1 is characterized in that above-mentioned bearing all adopts thrust ball bearing.