CN103624148A - Cold extrusion die for intermediate gear of one-way clutch - Google Patents

Abstract

The invention discloses a cold extrusion die for an intermediate gear of a one-way clutch, and belongs to the technical field of cold extrusion dies. The cold extrusion die for the intermediate gear of the one-way clutch comprises an upper die portion, a lower die portion and an ejection portion, wherein the upper die portion comprises an upper ejector plate (1), a base plate (2), a male die (3), an upper base plate (4), a fixing plate (5), guide pillars (6) and adjusting nuts (7), the lower die portion comprises a female die (8), an outer reinforcing ring (9), an ejector rod (10), a lower die base (11), an ejector rod base sleeve (15), a cushion type die (16), an outer reinforcing ring (17), threaded rods (18) and a pressing ring (19), and the ejection portion comprises lower guide sleeves (12), a bottom plate (13) and an ejector rod (14). According to the cold extrusion die for the intermediate gear of the one-way clutch, the production technology is simple, the manufacturing cost of the cold extrusion die is low, production efficiency of parts is high, the surfaces of the parts are highly polished, low-strength materials can be used for replacing high-strength materials, and cold extrusion is used for replacing the cutting technology, the forging technology, the casting technology and the drawing technology.

Description

A kind of one-way clutch idler gear cold extrusion die

Technical field

The invention belongs to cold extrusion die technical field, be specifically related to a kind of one-way clutch idler gear cold extrusion die.

Background technology

Cold extrusion is placed on metal blank in cold extrusion die cavity exactly, at room temperature, by punch fixing on forcing press, to blank, exerts pressure, and makes metal blank produce plastic deformation and makes the processing method of part.At present, China can be to plumbous, tin, the metals such as aluminium, copper, zinc and alloy thereof, mild steel, medium carbon steel, tool steel, low-alloy steel and stainless steel carry out cold extrusion, even to bearing steel, high-carbon high-aluminium alloy tool steel, high-speed steel etc., also can carry out the cold extrusion of certain deflection.Aspect extrusion equipment, China has possessed the ability of Design and manufacture tonnage squeezing presses at different levels.Except adopting universal machine forcing press, hydraulic press, cold extrusion press, also successfully adopt friction press and high speed high energy equipment to carry out cold extrusion production.Cold-stamped fundamental type has forward extrusion, backward extrusion, Compound Extrusion, radial compression, forging and stamping, is more than several basic cold-pressing deformation modes, along with the development of cold extruding technique, sometimes also cold volume die forging etc. is attributed to cold extrusion.No matter cold extrusion manufactures automobile, tractor, bearing, telecommunication apparatus, instrument etc. are dynamo-electric, or in the light industry such as bicycle, sewing machine, and be all widely used in national defense industry system.

The reach of science, has produced significant impact to cold extruding technique, is exactly specifically the impact that the application of computer in industrial analysis, Design of Dies, manufacture and technical process are controlled produces cold extruding technique.China will further develop this new technology of application, and development cold extruding technique mainly should be set about from following several respects;

Along with being on the rise of energy crisis, people will pay close attention to more to environmental quality, and market competition is increasingly sharpened in addition, impel forging produce to efficient, high-quality, refine, energy-saving material-saving future development.The output of the forging of refining of therefore producing with process meanses such as extrusion moldings will obtain larger development in market competition.Automobile, to lightness, high-speed, stationarity future development, has all proposed higher requirement to the dimensional accuracy of forging, weight precision and mechanical property etc.As motorcar engine with connecting rod forging except the error between concentric reducer has requirement, the weight error of every is also required to be not more than eight grams.The high request of new product, by the development of the production technology that promotes to refine.

Along with applying of refine production development and the cold extrusion of middle-size and small-size forging, warm extrusion technology, multistation cold extrusion forcing press, smoothing press and the special plane manufacturing and designing for certain forging can be greatly developed.

The current existing processing method of gear mainly contains following several, and gear-hobbing machine gear hobbing can be processed the helical teeth below 8 moduluses; Milling machine mill teeth can be processed spur rack; Slotting machine gear shaping can be processed internal tooth; Cold beat machine beat tooth can ELEMENTARY INTRODUCTION TO NON; Gear shaper gear-shaping can be processed 16 modulus gear wheels; Accurate casting tooth can be processed expensive pinion in enormous quantities; The gear die casting machine casting tooth majority of gear grinding machines roll flute on can processing precise machine tool is processed with non-ferrous metal gear; Gear shaving machine is the Metal Cutting Machine Tool that a kind of gear fine finishining is used, and because production efficiency is not high, during for typical products in mass production, cannot produce according to quantity, and product quality is difficult to guarantee on time.

Summary of the invention

The object of this invention is to provide a kind of one-way clutch idler gear cold extrusion die, production technology is simple, and die manufacturing cost is low, and part production efficiency is high, and piece surface is highly polished.

The present invention is achieved through the following technical solutions:

An one-way clutch idler gear cold extrusion die, by patrix part, counterdie part, eject part and form, its patrix partly comprises upper plate 1,backing plate 2, punch 3,upper padding plate 4,fixed head 5,guide pillar 6, adjustingnut 7; Counterdie partly comprises that die 8, outerstiffening ring 9, knock-pin 10, dieshoe 11, knock-pin cover forseat 15,pad mould 16, outerstiffening ring 17,screw rod 18,trim ring 19 form; Eject part and comprise lowerguide pin bushing 12,base plate 13,push rod 14; It is characterized in that: the below of upper plate 1 is disposed withbacking plate 2,upper padding plate 4 and fixedhead 5 by hex screw, in the cavity thatupper padding plate 4 and fixedhead 5 form, be provided with punch 3;

Dieshoe 11 tops are provided withpad mould 16, die 8, outerstiffening ring 9,pad mould 16 and the peripheral outerstiffening ring 17 arranging, and abovepad mould 16 and outer stiffeningring 17, are also provided withtrim ring 19, andtrim ring 19 links together by interior hexagonal screw rod and outer stiffeningring 17;

Base plate 13 middle parts are provided withpush rod 14, be provided withguide pillar 6 upper plate 1, dieshoe 11 andbase plate 13 are linked together atbase plate 13 four corners positions.

On described upper plate 1upper guide post 6, be also provided with adjustingnut 7, upper plate 1 four corners position is provided with guide pin bushing 12.

Described dieshoe 11 middle parts are provided with knock-pin cover forseat 15, and dieshoe 11 four corners positions are provided with guide pin bushing 12.

On describedbase plate 13upper guide posts 6, be also provided with adjustingnut 7,base plate 13 four corners positions are provided with guide pin bushing 12.

Beneficial effect of the present invention:

The accurate surface smoothness of accessory size after extruding is high, stock size precision can reach IT8～9 grade, be only second to finishing polish surface, save material, productivity ratio is high, be particularly suitable for the part that production lot is large, part that can machining shape complexity is as odd-shaped cross section, internal tooth, external tooth, irregularly-shaped hole and blind hole etc., cold-extruded part intensity is high, after extruding, metal blank is in three-dimensional compressive stress state, after distortion, material structure is fine and close, and there is continuous fiber flow direction, thereby the intensity of product improves a lot, available low-intensity material replaces high-strength material, cold extrusion replaces machining, forge, casting and deep-drawing technique.

Accompanying drawing explanation

Fig. 1 is cold extrusion front gear raw material figure of the present invention.

Fig. 2 is cold extrusion backgear blank side view of the present invention.

Fig. 3 is cold extrusion backgear blank front view of the present invention.

Fig. 4 is die figure of the present invention.

Fig. 5 is mould of the present invention overall structure schematic diagram on board.

In figure, top board 1,backing plate 2, punch 3,upper padding plate 4,fixed head 5,guide pillar 6, adjustingnut 7, profile of tooth die 8,outer stiffening ring 9, knock-pin 10, dieshoe 11,guide pin bushing 12,base plate 13,push rod 14, knock-pin cover forseat 15,pad mould 16,outer stiffening ring 17,screw rod 18,trim ring 19.

The specific embodiment

Below in conjunction with accompanying drawing, the present invention is described further:

The idler gear of one-way clutch shown in accompanying drawing of take is example, and mould of the present invention is elaborated.

1, gear annual production is 50000, and material is 20CrMnTi, and accuracy class requires to reach IT8-9 level.

2, the cost control of single-piece gear is in RMB5.00 and guarantee by drawing size and hardness.

According to above two Parameter Conditions, ad hocly to count the cold extrusion shaped machining mode that adds and produce, design cold extrusion die is as follows:

A kind of one-way clutch idler gear cold extrusion die, a kind of one-way clutch idler gear cold extrusion die, by patrix part, counterdie part, eject part and form, its patrix partly comprises upper plate 1,backing plate 2, punch 3,upper padding plate 4,fixed head 5,guide pillar 6, adjustingnut 7; Counterdie partly comprises that profile of tooth die 8, outerstiffening ring 9, knock-pin 10,die shoe 11, knock-pin cover forseat 15,pad mould 16, outerstiffening ring 17,screw rod 18,trim ring 19 form; Eject part and comprise lowerguide pin bushing 12,base plate 13,push rod 14; The below of upper plate 1 is disposed withbacking plate 2,upper padding plate 4 and fixedhead 5 by hex screw, in the cavity thatupper padding plate 4 and fixedhead 5 form, is provided with punch 3; On described upper plate 1upper guide post 6, be also provided with adjustingnut 7, upper plate 1 four corners position is provided with guide pin bushing 12.

Dieshoe 11 tops are provided withpad mould 16, profile of tooth die 8, outerstiffening ring 9,pad mould 16 and the peripheralouter stiffening ring 17 arranging, abovepad mould 16 and outerstiffening ring 17, be also provided withtrim ring 19,trim ring 19 links together by interior hexagonal screw rod and outer stiffeningring 17; Described dieshoe 11 middle parts are provided with knock-pin cover forseat 15, and dieshoe 11 four corners positions are provided with guide pin bushing 12.

Base plate 13 middle parts are provided withpush rod 14, be provided withguide pillar 6 upper plate 1, dieshoe 11 andbase plate 13 are linked together atbase plate 13 four corners positions; Onbase plate 13upper guide posts 6 of stating, be also provided with adjustingnut 7,base plate 13 four corners positions are provided with guide pin bushing 12.

The accurate surface smoothness of accessory size after extruding is high, stock size precision can reach IT8～9 grade, be only second to finishing polish surface, save material, productivity ratio is high, be particularly suitable for the part that production lot is large, part that can machining shape complexity is as odd-shaped cross section, internal tooth, external tooth, irregularly-shaped hole and blind hole etc., cold-extruded part intensity is high, after extruding, metal blank is in three-dimensional compressive stress state, after distortion, material structure is fine and close, and there is continuous fiber flow direction, thereby the intensity of product improves a lot, available low-intensity material replaces high-strength material, cold extrusion replaces machining, forge, casting and deep-drawing technique.

Mould start principle: after upper and lower mould opens, the blank of processing through phosphatization is placed on profile of tooth die 8, punch 3 presses down with upper plate 1, compressing blank is shaped in profile of tooth die 8, upper plate 1 is depressed into after the certain altitude that stopping means arranges, and return promotes rapidly, now pushrod 14 upwards start the forming workblank in profile of tooth die 8 is ejected, through operating personnel, take out, carry out the next action of repetition.

During die change, hex screw on fixedhead 5 is unclamped, just can easily take off punch 3,trim ring 19 is unloaded, conveniently replaced profile of tooth die 8; Mould is dismantled and changes convenient and swift, Design of Dies and low cost of manufacture.

Claims (4)

1. an one-way clutch idler gear cold extrusion die, by patrix part, counterdie part, eject part and form, its patrix partly comprises upper plate (1), backing plate (2), punch (3), upper padding plate (4), fixed head (5), guide pillar (6), adjusting nut (7); Counterdie partly comprises that die (8), outer stiffening ring (9), knock-pin (10), die shoe (11), knock-pin cover for seat (15), pad mould (16), outer stiffening ring (17), screw rod (18), trim ring (19) form; Eject part and comprise lower guide pin bushing (12), base plate (13), push rod (14); It is characterized in that: the below of upper plate (1) is disposed with backing plate (2), upper padding plate (4) and fixed head (5) by hex screw, in the cavity that upper padding plate (4) and fixed head (5) form, be provided with punch (3);

Die shoe (11) top is provided with pad mould (16), die (8), outer stiffening ring (9), pad mould (16) and the peripheral outer stiffening ring (17) arranging, top at pad mould (16) and outer stiffening ring (17) is also provided with trim ring (19), and trim ring (19) links together by interior hexagonal screw rod and outer stiffening ring (17);

Base plate (13) middle part is provided with push rod (14), is provided with guide pillar (6) upper plate (1), die shoe (11) and base plate (13) are linked together at base plate (13) four corners position.

2. a kind of one-way clutch idler gear cold extrusion die according to claim 1, it is characterized in that: on described upper plate (1) upper guide post (6), be also provided with adjusting nut (7), upper plate (1) four corners position is provided with guide pin bushing (12).

3. a kind of one-way clutch idler gear cold extrusion die according to claim 1, it is characterized in that: described die shoe (11) middle part is provided with knock-pin cover for seat (15), and die shoe (11) four corners position is provided with guide pin bushing (12).

4. a kind of one-way clutch idler gear cold extrusion die according to claim 1, it is characterized in that: on described base plate (13) upper guide post (6), be also provided with adjusting nut (7), base plate (13) four corners position is provided with guide pin bushing (12).

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