CN201231299Y - Cold-heading roller punch die - Google Patents

Abstract

The utility model relates to a cold heading roller punching die which is provided with a bottom die, an internal sleeve, a middle sleeve, an external sleeve, a pushover bar, a screw pad and a bottom die casing, wherein the middle sleeve is sleeved on the front part of the external sleeve, the internal sleeve is sleeved in the middle sleeve, the bottom sleeve is sleeved in the bottom die casing, the bottom die casing is sleeved on the middle part of the external sleeve, the pushover bar is arranged at the middle part of the die, and the screw pad is arranged at the rear part of the external sleeve and is matched with the pushover bar. The internal sleeve, the middle sleeve and the external sleeve of the punching die are made of alloy die steel, and the bottom die is made of mosaic hard alloy. The utility model has the advantages that the integral structure is perfect and compact, the accuracy of the whole die is improved, the manufacture cost of the roller is lowered, and the labor intensity and the efficiency are improved.

Description

The diel of cold-heading roller

Technical field:

The utility model relates to a kind of cold-heading roller diel of cylindrical roller bearing roller shaping processing usefulness.

Background technology:

Bearing (bearing) is a kind of being applied on the rotating mechanism, is used for supporting the parts of reducing friction and bearing load.Roller is one group of requisite part of bearing inside, and this mould structure is that special production for short columnar roller designs.Roller bearing is because the cross section is little, and the bearing capacity height be out of shape for a short time, is suitable for high load capacity, high-speed cruising, low vibration and quiet occasion, and this products radial bearing capacity is big simultaneously, and the roller bus is linearity with raceway and contacts, and is applicable to the load that withstands shocks, and the life-span is long.And roller bearing is also because the appearance and size compactness, and intensity is big, and bearing capacity is stronger, the rated speed height, and the precision height, thereby be widely used in each high-end field.The shaping processing of the supporting roller of roller bearing institute at present has only small part producer to adopt the cold-heading impact style, and all still adopts traditional mould structure (see figure 1), and the shortcoming of this mould structure existence is:

1. traditional cold-heading diel structure is in the process of high speed cold-heading punching press, punch die 2 ' inner surface various piece is owing to bear high pressure and strong fretting wear, therefore axial crack appears in inner surface easily, chamfered part also occurs crackle easily and peels off, push-off pin 1 ' is fracture easily also, therefore the roller surface of being processed also is accompanied by in various degree crackle, scuffing, folding and burr, and the result causes: 1. major defect appears in roller surface, and mechanical property decreases; 2. the metallographic structure of metal inside is also not too even; 3. heat treatment quenching degree is poor.Below what time influence the intensity of roller itself, be not enough to guarantee the bearing capacity and the fatigue resistance of finished product bearing, be difficult to satisfy needed working strength in present high-end field and specified bearing capacity more.

2. what traditional cold-heading diel structure adopted is monolithic construction, so the size of mould inside, deviation, form and position tolerance, roughness, heat treated hardness and quenching degree are difficult to make the life-span of mould to improve, so in the cold-heading punching course of roller since the error that mould structure and dimensional tolerance are brought be difficult to eliminate, roughness is also low, the size scattered error of each batch is bigger, can not guarantee the fine finishining that roller is follow-up, also just can not guarantee the assembly precision and the running accuracy of finished product bearing.

3. traditional cold-heading diel structure, owing to be to adopt monolithic construction, service life is lower, and at every turn when changing specification, entire die all will redesign and make, and is not easy to realize seriation, do not reach the exchange requirement, therefore cause the unnecessary consumption in raw material and the die manufacture, cause material cost, technology cost and people, machine cost too high, be difficult for increasing economic efficiency.

Summary of the invention:

Technical problem to be solved in the utility model is to overcome existing above-mentioned deficiency in the prior art, and the cold-heading roller diel that provides a kind of cylindrical roller bearing roller to be shaped processing usefulness.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: this cold-heading roller diel, it is characterized in that being provided with bed die, interior cover, middle cover, overcoat, push-off pin, spiral shell pad, bed die cover, middle condom is in the overcoat front portion, in overlapping in interior being enclosed within, bed die is enclosed within the bed die cover, the bed die condom is at the overcoat middle part, and push-off pin places in the middle of the mould, and the spiral shell pad places the overcoat rear portion and mates with push-off pin.

Cover, middle cover, overcoat adopt alloy die steel to make in the utility model, and bed die adopts inserted carbide alloy to make.

The utlity model has following advantage and effect: optimized integral structure, compactness, the precision of entire die is improved, and the roller manufacturing cost reduces, and has improved labour intensity and efficient.

Description of drawings:

Fig. 1 is a prior art cold-heading roller diel structural representation;

Fig. 2 is the structural representation of the embodiment of the invention.

The specific embodiment:

Referring to Fig. 2, the diel of the utility model embodiment cold-heading roller is applicable to the processing of cylindrical roller bearing roller.Processed roller material adopts high-carbon-chromium bearing steel, present embodiment is provided with bed die 1, interior cover 2, middle cover 3, overcoat 4, push-off pin 5, spiral shell pad 6, bed die cover 7, middle cover 3 is enclosed within overcoat 4 front portions, cover was 3 li during interior cover 2 was enclosed within, bed die 1 is enclosed within 7 li in bed die cover, bed die cover 7 is enclosed within overcoat 4 middle parts, push-off pin 5 places in the middle of the mould, spiral shell pad 6 places overcoat 4 rear portions and mates with push-off pin 5, wimble fraction I (the inner surface of interior cover 2 in the mould, as shown in Figure 2) and the chamfered part II (as shown in Figure 2) on the bed die 1 separate interior cover 2 at intersection, middle cover 3 and overcoat 4 interference fit, interior cover 2 entity sizes are less, therefore obtain height and hardness uniformly during heat treatment easily, wear-resisting, good toughness, service life and intensity height; In cover 3 and overcoat 4 through the heat treatment vessel higher mechanical properties that is easy to get, through interference fit, cover 2 was both wear-resisting in making, do not crack again, working strength improves greatly, and interior cover 2, middle cover 3, overcoat 4 adopt alloy die steel to make, and bed die 1 adopts inserted carbide alloy, wearability is good, and die life improves greatly; Push-off pin 5 enlarged diameter, contraction in length, so bending strength strengthens greatly.Above characteristics make and the structure optimization of present embodiment mold integral, compactness have improved labour intensity and efficient.

The design feature of the utility model embodiment makes the precision of entire die improve greatly.Because: 1. the split part is than the easy processing of whole part; 2. mould parts is convenient to heat treatment, has reduced the distortion after quenching and the tempering; 3. the convenient follow-up fine finishining of part; 4. the set of molds dressing is easily implemented, and easily adjusts.Therefore the dimensional accuracy of mould key position has just had assurance.Consequently: 1. the appearance and size of roller is very even; 2. chamfering nature moulding; 3. the subsequent technique precision of roller (comprise position error in the processing, dimensional tolerance, end face run-out, convexity, logarithmic curve, roughness, heat treatment after deformation extent and metallographic structure) improves greatly.

The utility model embodiment is owing to adopted novel cold-heading diel structure, thereby make that current cost reduces stamping roller greatly making just, specific as follows: 1. material cost, owing to adopted novel cold-heading diel structure, so cover 2, middle cover 3 and bed die 1 in when changing specification, only need making and change at every turn, all the other all are general parts, can use for a long time, have saved great deal of raw materials; 2. the technology cost owing to adopted novel cold-heading diel structure, makes the cold-heading diel life-span improve more than 4 times, so roller is saved greatly at the technology cost at the initial stage of manufacturing; 3. human cost, owing to adopted novel cold-heading diel structure, make that the size phase mutual deviation between the roller is very little, be convenient to follow-up mill processing, significantly reduce roller and made the sorting work amount in later stage, and the raising of die life shortened the lead-time, and the cold-heading ram efficiency is promoted, and human cost is saved greatly.

The utility model has reached efficient nothing and has cut production, big gross appearance result of use.And utilize punch die that steel (bar) direct forming is become roller, appearance and size and form and position tolerance all can reach the buffing level, and the moulding of chamfering nature has changed traditional monoblock type mould structure.Why adopt this new and innovative design, be because roller is matched within the bearing, bear high rotating speed, top load, the height of roller quality will directly determine the life-span and the vibration and quiet of bearing, therefore, at present more and more higher to the requirement of the cylindrical roller bearing that is used in various rotating mechanisms, necessarily require high performance roller and lasso to assemble the requirement that could satisfy use occasion.The internal organizational structure of roller, metallographic structure, heat treatment hardness, quenching degree, the aspect such as put in order of metal inside crystal grain is all relevant with the bearing capacity and the compression strength of roller, also with the limit speed that finally makes complete bearing, bearing capacity and fatigue resistance all have relation, and the roller bearing product has entered into various high-end fields at present, such as Aero-Space, household electrical appliances, automobile etc., thereby requiring has high-precision roller to be matched in bearing, can guarantee the low vibration of bearing under high rotating speed like this, quiet and good smooth operation reaches the instructions for use of various occasions.

Claims (2)

1, a kind of cold-heading roller diel, it is characterized in that: be provided with bed die, interior cover, middle cover, overcoat, push-off pin, spiral shell pad, bed die cover, middle condom is in the overcoat front portion, in overlapping in interior being enclosed within, bed die is enclosed within the bed die cover, the bed die condom is at the overcoat middle part, and push-off pin places in the middle of the mould, and the spiral shell pad places the overcoat rear portion and mates with push-off pin.

2, cold-heading roller according to claim 1 diel is characterized in that: interior cover, middle cover, overcoat adopt alloy die steel to make, and bed die adopts inserted carbide alloy to make.

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