CN219561273U - Upper stamping die for cold heading forming of roller - Google Patents

Abstract

The utility model provides a stamping die is used in roller cold heading shaping, includes shaping inner core and overcoat the up end of shaping inner core is equipped with the punching press groove that inwards caves in and forms, the bottom surface middle part of punching press groove is equipped with the shaping protruding structure that is used for forming the sunken shape of roller terminal surface, is equipped with along the axial setting on the punching press groove bottom surface between this shaping protruding structure and the punching press groove lateral wall and runs through the exhaust hole of shaping inner core. According to the scheme, through the innovative design, oil stains and tiny granular dust on the end faces of the rollers can flow along with the airflow formed by impact in the stamping process, the airflow carries the oil stains and the granular dust to be discharged through the exhaust holes, so that the vibration is small in the whole stamping process, the precision of the end faces of the rollers after the forming is effectively improved, and the service life of the upper stamping die can be prolonged.

Description

Upper stamping die for cold heading forming of roller

Technical Field

The utility model relates to the technical field of roller forming dies for bearings, in particular to an upper stamping die for cold heading forming of a roller.

Background

As is well known, when the rollers are mounted in the bearing retainer in a matched manner, lubricating oil is required to be filled between gaps so as to lubricate the bearing under high-speed rotation, the end surfaces of the two ends of the conventional rollers are plane, and when the lubricating oil lubricates the two end parts of the rollers, the lubricating oil is difficult to remain at the two end parts of the rollers due to the limitation of the shape of the rollers, so that the two end parts of the rollers are seriously worn, and the service life of the rollers is greatly reduced; because of the defects, when a roller processing enterprise processes the roller, the end face of the roller is processed into a concave conical groove, the lowest point of the conical groove is used as a center point, and when the roller with the structure rotates in a bearing, lubricating oil can be reserved in the conical groove of the roller, so that the service life of the roller is prolonged; when such roller is processed through the cold header, as the end face of the roller is provided with the concave conical groove, oil stains and tiny granular dust can flow along with impact air flow and are accumulated on the concave conical groove wall and cannot be discharged in time in the stamping process, so that vibration is large in the stamping forming process, the precision of the processed end face of the roller cannot be guaranteed, and the rejection rate is high.

Disclosure of Invention

In order to solve the technical problems, the utility model provides an upper die for cold heading forming of a roller, and the end face precision of the roller is improved by optimizing the structure of the upper die.

The technical scheme adopted by the utility model is as follows: the utility model provides a stamping die is used in roller cold heading shaping, includes shaping inner core and overcoat the up end of shaping inner core is equipped with the punching press groove that inwards caves in and forms, the bottom surface middle part of punching press groove is equipped with the shaping protruding structure that is used for forming the sunken shape of roller terminal surface, is equipped with along the axial setting on the punching press groove bottom surface between this shaping protruding structure and the punching press groove lateral wall and runs through the exhaust hole of shaping inner core.

Preferably, the exhaust hole is communicated with a diversion trench arranged on the outer sleeve.

Preferably, the diameter of the exhaust hole is 0.45-0.55 mm.

As a preferable scheme, a damping groove is also arranged between the inner surface of the outer sleeve and the molding inner core.

Preferably, a positioning groove is further formed in the outer peripheral surface of the outer sleeve.

As a preferable scheme, the coaxiality of the molding inner core and the outer sleeve is less than or equal to 0.01 mm.

The beneficial effects of the utility model are as follows:

according to the utility model, through the optimal design of the existing die, the service life of the upper die is prolonged while the end face precision of the processing roller is improved, and the specific effects are analyzed as follows:

this scheme is through innovative design, is located the punching press inslot of shaping inner core, is equipped with on the punching press groove bottom surface between shaping protruding structure and the punching press groove lateral wall along the axial setting and runs through the exhaust hole of shaping inner core, this exhaust hole is linked together with the guiding gutter on the overcoat, in the punching press process, greasy dirt and tiny particle dust on the roller terminal surface can flow along with the air current that the impact formed, this air current carries greasy dirt and particulate dust to discharge through the exhaust hole to guarantee that the vibration is less in the whole punching press process, effectively improve the precision of shaping back roller terminal surface, but also can prolong the life of going up the die.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a cold heading die according to the present utility model;

fig. 2 is an internal schematic view of the punch slot of fig. 1.

Reference numerals: 1. the device comprises a molding inner core, 11, a stamping groove, 12, a molding protruding structure, 121, spherical protrusions, 122, a conical surface, 13, an exhaust hole, 2, an outer sleeve, 21 and a damping groove.

Detailed Description

The present utility model will be specifically described below by way of exemplary embodiments. It is to be understood that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.

It should be noted that: unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. As used in the specification and claims of this application, the terms "a," "an," and "the" and similar referents are not to be construed to limit the scope of at least one. The word "comprising" or "comprises", and the like, indicates that elements or items listed thereafter or equivalents thereof may be substituted for elements or items thereof in addition to those listed thereafter or equivalents thereof without departing from the scope of the word "comprising" or "comprising".

As known, in order to obtain a perfect rolling body blank, a cold heading die with reasonable structure and excellent precision is required, and when the original cold heading die is used for stamping a roller with an end face concave conical surface, oil stains and tiny granular dust can flow along with impact air flow and are accumulated on the concave conical groove wall in the stamping process of an upper die and cannot be discharged in time due to the special structure of the roller, so that vibration is large in the stamping process, the precision of the end face of the processed roller cannot be guaranteed, and the rejection rate is high. According to the scheme, the structure of the upper stamping die is optimized through an innovative structural design, so that the technical problems are solved; the detailed structure of the die in specific combination with embodiment one and fig. 1-2 is described as follows:

embodiment 1,

As shown in fig. 1, an upper stamping die for cold heading forming of a roller consists of a forming inner core 1 and an outer sleeve 2, wherein the outer sleeve 2 is sleeved outside the forming inner core 1, and the coaxiality of the forming inner core and the outer sleeve is less than or equal to 0.01 mm; a pressing groove 11 formed to be recessed inward is provided in the upper end surface of the molding core 1, and a pressing means for press molding the roller end surface is provided in the pressing groove 11.

As shown in fig. 2, the middle part of the bottom surface of the punching groove 11 is provided with a forming protrusion structure 12, in the punching process, the forming protrusion structure 12 contacts with the roller end surface and forms a concave shape of the roller end surface, the bottom surface of the punching groove between the forming protrusion structure 12 and the side wall of the punching groove 11 is provided with an exhaust hole 13 axially arranged along the upper punching die and penetrating through the forming inner core, the exhaust hole 13 is communicated with a diversion groove arranged on the outer sleeve 2, in the punching process, greasy dirt and tiny granular dust on the roller end surface can flow along with the airflow formed by impact, and the airflow is discharged through the exhaust hole with the greasy dirt and the granular dust, so that the vibration is small in the whole punching process, the precision of the roller end surface after forming is effectively improved, and the service life of the upper punching die can be prolonged.

As shown in fig. 2, the forming protrusion structure 12 is formed by surrounding an upper top surface, an inclined side wall surface and a bottom surface of the punching groove 11, the side wall surface and the axis of the upper punching die form an included angle of 45 °, the upper top surface is composed of a spherical protrusion 121 at a central position and a conical surface 122 positioned at the periphery of the spherical protrusion, the conical surface 122 gradually rises from the outer side to the inner side, the structure can realize that the end surface shape of the roller after punching has a concave conical surface, the central part of the conical surface has a spherical groove, and the conical surface gradually sinks from the outer side to the central point, which is helpful for forming an oil film for lubrication, and the service life of the roller can be greatly prolonged.

In this embodiment, the diameter of the exhaust hole is not easy to be too large, the overall strength of the die is not easy to be affected by too large, too small is not convenient to discharge greasy dirt and granular dust, and the diameter of the exhaust hole can be 0.45-0.55 mm, preferably 0.5 mm.

In this embodiment, the diameter of the spherical protrusion is preferably 2.80±0.05 mm.

In this embodiment, a damping groove 21 is further provided between the inner surface of the outer sleeve 2 and the molding core 1.

In this scheme, in order to make this modular punch assembly install on the lathe conveniently, can also set up the constant head tank on the outer peripheral face of overcoat 2.

In addition, in this scheme, the materials of the molding inner core 1 and the outer sleeve 2 are not limited, and under the condition that the overall strength of the mold is ensured to be satisfied, a person skilled in the art can reasonably select the materials of the above components according to the understanding of the above technical scheme.

The details of this embodiment are not described in the prior art;

it should be noted that while the above describes the utility model in terms of embodiments, many other embodiments of the utility model are possible. Various modifications and variations of this utility model may be apparent to those skilled in the art without departing from the spirit and scope of this utility model, and it is intended to cover in the appended claims all such modifications and variations as fall within the true scope of this utility model.

Claims (6)

1. The utility model provides a last die is used in cold heading shaping of roller, includes shaping inner core and overcoat, its characterized in that: the upper end face of the forming inner core is provided with a stamping groove which is formed by recessing inwards, the middle part of the bottom face of the stamping groove is provided with a forming protruding structure which is used for forming the recessed shape of the end face of the roller, and the bottom face of the stamping groove between the forming protruding structure and the side wall of the stamping groove is provided with an exhaust hole which is axially arranged and penetrates through the forming inner core.

2. The upper die for cold heading forming of a roller according to claim 1, wherein: the exhaust hole is communicated with the diversion trench arranged on the outer sleeve.

3. An upper die for cold heading forming of a roller according to claim 1 or 2, characterized in that: the diameter of the exhaust hole is 0.45-0.55 mm.

4. The upper die for cold heading forming of a roller according to claim 1, wherein: a damping groove is also arranged between the inner surface of the outer sleeve and the molding inner core.

5. The upper die for cold heading forming of a roller according to claim 1, wherein: and a positioning groove is also formed in the outer peripheral surface of the outer sleeve.

6. The upper die for cold heading forming of a roller according to claim 1, wherein: the coaxiality of the molding inner core and the outer sleeve is less than or equal to 0.01 mm.