CN201361668Y - Ring-type axial-fed thread rolling die for double-circular-arc progressive thread form - Google Patents

Abstract

The utility model relates to a ring-type axial-fed thread rolling die for a double-circular-arc progressive thread form, which is characterized in that starting from the leading-in angle, the groove between the threads of the thread rolling die is a circular-arc-shaped groove and the spaces between the threads are equal. The thread rolling die is characterized in that since the leading-in angle of the thread rolling die is progressive, the strength of the leading-in part is enhanced; in the process of use, all the threads of the thread rolling die take part in rolling, consequently, the stress is uniform, the defect in the operation of certain of the threads is avoided, and the service life of the whole thread rolling die is prolonged.

Description

The ring-like string of the gradual tooth form of two circular arcs rolls cylindrical die roll

Technical field

The utility model relates to ring-like string and rolls cylindrical die roll, particularly be that the ring-like string of a kind of pair of gradual tooth form of circular arc rolls cylindrical die roll.

Background technology

Ring-like string roll cylindrical die roll be production speciality full thread bar must use cutter, can be by adjusting that lead angle be produced different size but tooth apart from identical screw rod.The billowing silk wheel of existing ring-like string tooth form importing angle is divided two kinds on the market: as shown in Figure 1, a kind of is after the whole tooth of cylindrical die roll processes, the grinding machine chamfering, and this kind tooth form is owing to be flat-top, and it is stressed bigger to rub in process of production, and heating causes initial failure easily; As shown in Figure 2 second kind to be cylindrical die roll having full tooth processing under the situation that imports the angle, the lead-in portion depth of threat is identical with normal depth of threat, lead-in portion is because tooth is deep in process of production for this kind tooth form, easy snaggletooth influences the bulk life time of cylindrical die roll.Design so how that a kind of stressed less, lead-in portion that rubs can increase the intensity of tooth portion again in long-time use and the cylindrical die roll of durability seems particularly important.

The utility model content

In order to overcome above-mentioned technical defective, the utility model provides the ring-like string of a kind of pair of gradual tooth form of circular arc to roll cylindrical die roll.

To achieve these goals, the utility model adopts following technical scheme:

The ring-like string of the gradual tooth form of two circular arcs rolls cylindrical die roll, it is characterized in that: cylindrical die roll is that arc groove and tooth spacing are identical between the silk tooth that imports the angle and begin.

Utility model has following characteristics:

1, the ring-like string of the gradual tooth form of two circular arcs rolls cylindrical die roll, and the importing angle is adopted gradual, has increased the intensity of lead-in portion.

2, the whole teeth of cylindrical die roll participate in roll extrusion in the use, and are stressed even, avoided the drawback of part tooth work, increased the cylindrical die roll bulk life time.

Description of drawings

Fig. 1 is this existing structural representation;

Fig. 2 is that existing a kind of ring-like string rolls cylindrical die roll;

Fig. 3 is that the ring-like string of existing another kind rolls cylindrical die roll;

Fig. 4 is a structural representation of the present utility model.

Specific embodiments

Further specify with reference to the accompanying drawings.

As shown in Figure 4, the ring-like string of the gradual tooth form of two circular arcs rolls cylindrical die roll, it is characterized in that: 2 of front end teeth that begin cylindrical die roll 1 from the importing angle are that arc groove 3 and tooth spacing are identical.

At last, should be pointed out that above embodiment only is the more representational example of the utility model.Obviously, the technical solution of the utility model is not limited to the foregoing description, and many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model all should be thought protection domain of the present utility model.

Claims (1)

1, the ring-like string of the gradual tooth form of two circular arcs rolls cylindrical die roll, it is characterized in that: cylindrical die roll is that an arc groove and a silk tooth spacing are identical between the silk tooth that imports the angle and begin.

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