CN211588242U

CN211588242U - Embossing die of embossed steel pipe and embossing combined production die

Info

Publication number: CN211588242U
Application number: CN201922328315.XU
Authority: CN
Inventors: 高银胜; 施利彪; 邢颢文
Original assignee: Jiangsu Tonglian Technology Co ltd
Current assignee: Jiangsu Tonglian Technology Co ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-09-29
Anticipated expiration: 2029-12-23

Abstract

The utility model discloses an embossing die of knurling steel pipe, including die block and last mould, be equipped with the decorative pattern pit and the decorative pattern arch that are used for shaping steel pipe decorative pattern on die block and the last mould respectively, the decorative pattern pit corresponds the setting with the decorative pattern arch from top to bottom, decorative pattern pit and the bellied position of decorative pattern are the knurling district, lie in on die block and the last mould the both sides in knurling district set up respectively along the recess and the sand grip of length direction extension, corresponding setting is used for about recess and the sand grip the protruding muscle that the both sides shaping length direction of steel pipe decorative pattern extended. The utility model discloses can avoid steel band knurling forming process in the steel band side to extend the deformation problem, reduce follow-up process step, raise the efficiency, reduction in production cost.

Description

Embossing die of embossed steel pipe and embossing combined production die

Technical Field

The utility model relates to a steel pipe knurling mould and knurling combination production mould especially relate to a knurling mould and knurling combination production mould of knurling steel pipe.

Background

Fig. 1 shows a typical embossed steel pipe, in which a wall surface of the steel pipe is formed into a concavo-convex shape by extending the pipe wall by die pressing. The production process of the embossed steel pipe comprises the steps of molding a steel belt into a concave-convex shape, axially bending the steel belt, welding and forming in the length direction, and shaping and cutting in the subsequent process to obtain a product meeting the requirements. In the production process, the extension amount of the steel strip is different at different concave-convex shape positions in the process of forming the concave-convex shape by die pressing, so that the side edge of the steel strip after the embossing is difficult to keep a linear state, and the difficulty is caused in subsequent bending welding. Therefore, in the prior art, an edge milling process is required to be added after embossing is finished, the side edge of the steel strip is milled and shaped to form a straight edge and meet the size requirement, and then the steel strip is bent and welded. Therefore, on one hand, the process steps are increased, the production efficiency is influenced, on the other hand, after the embossing is finished, a common plane tool cannot be used for clamping the steel belt edge milling, a special clamping tool corresponding to the embossing pattern shape is needed, the edge milling process can form steel belt waste, the steel belt needed for producing the same steel pipe is widened, and the production cost of the product is difficult to reduce.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned prior art defect, the utility model aims to provide an embossing die of knurling steel pipe solves the steel band side extension deformation problem among the steel band knurling forming process. Another task of the utility model is to provide an embossing combination production mould of knurling steel pipe.

The utility model discloses technical scheme is such: the utility model provides an embossing mold utensil of knurling steel pipe, includes die block and last mould, be equipped with the decorative pattern pit and the decorative pattern arch that are used for forming steel pipe decorative pattern on die block and the last mould respectively, the decorative pattern pit corresponds the setting with the decorative pattern arch from top to bottom, the convex position of decorative pattern pit and decorative pattern is the knurling district, lie in on die block and the last mould the both sides in knurling district set up respectively along the recess and the sand grip of length direction extension, corresponding setting is used for from top to bottom recess and sand grip the protruding muscle that the both sides shaping length direction of steel pipe decorative pattern extends.

Further, the groove is an arc-shaped groove, and chamfers are arranged on two sides of the arc-shaped groove.

Preferably, the arc-shaped groove is a semicircular groove.

Further, the gap between the groove and the edge of the embossed area is 3% -5% of the width of the embossed area.

Further, the width of the groove is 6% -10% of the width of the embossing area.

The utility model provides a knurling combination production mould of knurling steel pipe, includes knurling mould and rolling die, rolling die includes rolling wheel and lower rolling wheel, it corresponds the setting and is located from top to bottom to go up rolling wheel and lower rolling wheel be used for flattening on the length extension line of recess and sand grip protruding muscle.

Compared with the prior art, the utility model the advantage lie in: through set up recess and sand grip in knurling district both sides, form protruding muscle in the decorative pattern both sides when the decorative pattern shaping, the steel band extension volume that the size that makes the decorative pattern position produce absorbs the elimination along protruding muscle length direction in protruding muscle position, block its stretching to the steel band both sides, make the steel band both sides along keeping the linear state, further cooperate the rolling die protruding muscle that flattens, this makes the steel band that the knurling was accomplished no longer need the edge milling can directly carry out the bending weld, the process steps raises the efficiency is reduced, the development of material loss and centre gripping mould has also been reduced, steel pipe manufacturing cost has been reduced.

Drawings

Fig. 1 is a schematic structural view of an embossed steel pipe.

FIG. 2 is a partial schematic view of the edge of a prior art steel strip after embossing the surface.

Fig. 3 is a schematic top view of a bottom die of an embossing die for embossing a steel pipe.

Fig. 4 is a schematic side sectional view of a bottom die of an embossing die for embossing a steel pipe.

FIG. 5 is a schematic side sectional view of the upper mold of the embossing die for embossing the steel pipe

Fig. 6 is a schematic view of an embossing combined production die for embossing a steel pipe.

Detailed Description

The present invention will be further described with reference to the following examples, which should not be construed as limiting the invention.

The embossing die for the embossed steel pipe comprises a bottom die 1 and an upper die 2, wherein the bottom die 1 is generally a fixed die, the upper die 2 is a movable die, and corresponding patterns are formed on the surface of a steel belt through concave-convex textures on the surface when the upper die 2 and the bottom die 1 are matched. Due to the lack of control over the sides of the strip 3, the strip extension formed by the embossing is directly reflected on the sides of the strip 3 after the surface embossing of the strip 3, as shown in fig. 2, so that the strip edges 3a cannot remain flush.

As shown in fig. 3 to 5, the bottom mold 1 and the upper mold 2 are respectively provided with pattern pits 4 and pattern protrusions 5 for forming the steel pipe pattern, in this embodiment, the pattern pits 4 are provided on the surface of the bottom mold 1, and the pattern protrusions 5 are provided on the surface of the upper mold 2. The pattern pits 4 and the pattern protrusions 5 are correspondingly arranged up and down, and the positions of the pattern pits 4 and the pattern protrusions 5 are an embossing area A. Since the patterns of the embossed regions A are different in the longitudinal direction of the steel strip, the extending amounts of the steel strip to both sides in the embossing process are also different in the longitudinal direction, in order to eliminate the uneven edge caused by the non-uniform extending amounts. In this embodiment, the bottom die 1 and the upper die 2 are respectively provided with a groove 6 and a protruding strip 7 extending along the length direction at two sides of the embossing area a, specifically, the bottom die 1 is provided with the groove 6, and the upper die 2 is provided with the protruding strip 7. The grooves 6 and the convex strips 7 are arranged correspondingly up and down, and when the upper die 2 and the bottom die 1 are closed, the steel strip forms patterns and simultaneously forms the convex strips extending in the length direction on two sides of the patterns. In order to ensure the surface quality of the finished steel pipe and facilitate the subsequent flattening step, the groove 6 is an arc-shaped groove 6, chamfers are arranged on two sides of the arc-shaped groove 6, and the shape of the convex strip 7 corresponds to that of the groove 6. The gap between the groove 6 and the edge of the embossed region a is set to 3% to 5%, preferably 3% of the width of the embossed region a, and the width of the groove 6 is 6% to 10%, preferably 7% of the width of the embossed region a. This width and clearance set up and have guaranteed that fashioned flower shape can not receive the protruding muscle influence and warp and can effectively prevent the irregular extension at steel band border again simultaneously, therefore accomplish the steel band edge of knurling and still can keep the straight line state of flushing.

As shown in fig. 6, in the whole process of manufacturing the embossed steel pipe, a rolling mold is needed to be disposed at the back of the embossing mold for embossing the steel pipe to flatten the ribs, and only the embossed shape is left for bending welding. The embossing die and the rolling die are combined to form an embossing combined production die for the embossed steel pipe. The rolling die comprises an upper rolling wheel 8 and a lower rolling wheel 9, the upper rolling wheel 8 and the lower rolling wheel 9 are arranged in a vertically corresponding mode, the surfaces of the upper rolling wheel 8 and the lower rolling wheel 9 are both planes, and the upper rolling wheel 8 and the lower rolling wheel 9 are located on the length extension lines of the grooves 6 and the convex strips 7 and are used for flattening the convex ribs. When the embossed steel strip enters between the upper rolling wheel 8 and the lower rolling wheel 9, the convex ribs are expanded and flattened through the rolling of the upper rolling wheel 8 and the lower rolling wheel 9, and the deformation of the convex ribs in the length direction of the steel strip is consistent all the time, so that the edge of the steel strip is still kept in a flush straight line state after being flattened.

Claims

1. The utility model provides an embossing mold utensil of knurling steel pipe, a serial communication port, includes die block and last mould, be equipped with the decorative pattern pit and the decorative pattern arch that are used for shaping steel pipe decorative pattern on die block and the last mould respectively, the decorative pattern pit corresponds the setting with the decorative pattern arch from top to bottom, the protruding position of decorative pattern pit and decorative pattern is the knurling district, lie in on die block and the last mould the both sides in knurling district set up respectively along the recess and the sand grip of length direction extension, corresponding setting is used for about recess and the sand grip the protruding muscle that the both sides shaping length direction of steel pipe decorative pattern extends.

2. The embossing die for embossing a steel pipe as claimed in claim 1, wherein the groove is an arc-shaped groove, and chamfers are provided at both sides of the arc-shaped groove.

3. The embossing die for embossing a steel pipe as set forth in claim 2, wherein said arc-shaped groove is a semicircular groove.

4. The embossing die for embossing a steel pipe as claimed in claim 1, wherein a gap between the groove and the edge of the embossed region is 3 to 5% of the width of the embossed region.

5. The embossing die for embossing a steel pipe as set forth in claim 1, wherein the width of the groove is 6 to 10% of the width of the embossed section.

6. An embossing combined production die for an embossed steel pipe, which is characterized by comprising the embossing die and the rolling die in any one of claims 1 to 5, wherein the rolling die comprises an upper rolling wheel and a lower rolling wheel, and the upper rolling wheel and the lower rolling wheel are correspondingly arranged up and down and are positioned on the length extension lines of the grooves and the convex strips for flattening the convex strips.