阅读说明：本技术 一种链条空心铆钉墩头模具 (Chain hollow rivet pier head mould ) 是由 金玉谟 朱汉恩 蒋晓林 孙克杰 张孙鹏 于 2021-06-08 设计创作，主要内容包括：一种链条空心铆钉墩头模具,涉及级进模技术领域,包括括相互配合的上模和下模,上模包括上模座,下模包括下模座,在上模座和下模座之间通过上垫板A、上固定板A、墩头钉A、产品定位钉A、下固定块A、下固定板A、下垫板A共同构成第一工位；并通过上垫板B、上固定板B、墩头钉B、产品定位钉B、下固定块B、下固定板B、下垫板B共同构成第二工位。本发明提供了一种链条空心铆钉墩头模具,该模具将初步墩头和后续压平两道工序经过精确的结构设计全部在一套模具中完成,即提高了工作效率,又保证了产品质量。(A chain hollow rivet pier head die relates to the technical field of progressive dies and comprises an upper die and a lower die which are matched with each other, wherein the upper die comprises an upper die holder, the lower die comprises a lower die holder, and a first station is formed between the upper die holder and the lower die holder through an upper base plate A, an upper fixing plate A, a pier head nail A, a product positioning nail A, a lower fixing block A, a lower fixing plate A and a lower base plate A; and the upper base plate B, the upper fixing plate B, the pier stud B, the product positioning nail B, the lower fixing block B, the lower fixing plate B and the lower base plate B jointly form a second station. The invention provides a chain hollow rivet pier head die, which is characterized in that a primary pier head procedure and a subsequent flattening procedure are completed in one set of die through precise structural design, so that the working efficiency is improved, and the product quality is ensured.)

1. The utility model provides a chain hollow rivet pier nose mould which characterized in that: the device comprises an upper die and a lower die which are matched with each other, wherein the upper die comprises an upper die holder, the lower die comprises a lower die holder, and a first station is formed between the upper die holder and the lower die holder through an upper base plate A, an upper fixing plate A, a pier stud A, a product positioning stud A, a lower fixing block A, a lower fixing plate A and a lower base plate A; a second station is formed by the upper padding plate B, the upper fixing plate B, the pier stud B, the product positioning nail B, the lower fixing block B, the lower fixing plate B and the lower padding plate B;

the upper fixing plate A and the upper padding plate A, and the upper fixing plate B and the upper padding plate B are respectively and fixedly connected with the upper die base through upper die fixing bolts, and the upper parts of the pier stud A and the pier stud B are respectively embedded and fixed in the upper fixing plate A and the upper fixing plate B; the lower cushion plate A and the lower fixing plate A as well as the lower cushion plate B and the lower fixing plate B are respectively and fixedly connected with the lower die base through lower die fixing bolts, the lower parts of the lower fixing block A and the lower fixing block B are respectively embedded and fixed in the lower fixing plate A and the lower fixing plate B, and the lower parts of the product positioning nail A and the product positioning nail B are respectively embedded and fixed in the corresponding lower fixing block A and the lower fixing block B;

the pier stud A and the product positioning stud A; and the pier head nail B and the product positioning nail B are arranged oppositely along the longitudinal direction respectively, and the chain hollow rivet of the pier head is processed and molded through the first station and the second station.

2. The chain blind rivet pier head die of claim 1, wherein: the lower end of the pier stud A comprises a first positioning part which is positioned at the center of the lower end and protrudes downwards and a first annular inclined plane which surrounds the outer side of the first positioning part, the height of the outer edge of the first annular inclined plane is higher than that of the inner edge, the shape and the size of the first positioning part are matched with the diameter of an opening at the upper end of the hollow chain rivet, and the first annular inclined plane is used for extruding the side wall of the opening at the upper end of the hollow chain rivet and enabling the first annular inclined plane to be overturned to an angle matched with the first annular inclined plane.

3. The chain blind rivet pier head die of claim 2, wherein: the included angle between the first annular inclined plane and the horizontal plane is 2 degrees.

4. The chain blind rivet pier head die of claim 1, wherein: the lower end of the pier stud B comprises a second positioning part which is positioned in the center of the lower end and protrudes downwards and a second annular inclined surface which surrounds the second positioning part, the height of the outer edge of the second annular inclined surface is lower than that of the inner edge, the shape and the size of the second positioning part are matched with the diameter of an opening at the upper end of the hollow chain rivet, and the second annular inclined surface is used for extruding the everting side wall of the hollow chain rivet and flattening the everting side wall at a designated position matched with the second annular inclined surface.

5. The chain blind rivet pier head die of claim 4, wherein: the included angle between the second annular inclined plane and the horizontal plane is 2.5 degrees.

Technical Field

The invention relates to the technical field of progressive dies, in particular to a die for a hollow rivet pier head of a chain.

Background

Many chains are equipped with at present and attach the board, can set up hollow rivet in attaching the board structure, and when the assembly, hollow rivet needs the pier nose, and current pier nose technology is through the preliminary pier nose of mould after, and rethread manual beating makes the port lower surface that hollow rivet turned up and attaches the laminating of the washer upper surface on the board. The production mode has the advantages of complex operation, large workload and low efficiency, and the main reasons of the production mode are that the existing die only has a single station and lacks of accurate process design, the preliminary pier head and the subsequent flattening of the hollow rivet can not be completed in the die, and the hollow rivet flattened by hand can inevitably cause the defect of poor consistency.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides the die for the hollow rivet head of the chain, which completely completes the primary head upsetting procedure and the subsequent flattening procedure in one set of die through precise structural design, thereby improving the working efficiency and ensuring the product quality.

In order to solve the problems, the technical scheme of the invention is as follows:

a chain hollow rivet pier head die comprises an upper die and a lower die which are matched with each other, wherein the upper die comprises an upper die base, the lower die comprises a lower die base, and a first station is formed between the upper die base and the lower die base through an upper base plate A, an upper fixing plate A, a pier head nail A, a product positioning nail A, a lower fixing block A, a lower fixing plate A and a lower base plate A; a second station is formed by the upper padding plate B, the upper fixing plate B, the pier stud B, the product positioning nail B, the lower fixing block B, the lower fixing plate B and the lower padding plate B;

the upper fixing plate A and the upper padding plate A, and the upper fixing plate B and the upper padding plate B are respectively and fixedly connected with the upper die base through upper die fixing bolts, and the upper parts of the pier stud A and the pier stud B are respectively embedded and fixed in the upper fixing plate A and the upper fixing plate B; the lower cushion plate A and the lower fixing plate A as well as the lower cushion plate B and the lower fixing plate B are respectively and fixedly connected with the lower die base through lower die fixing bolts, the lower parts of the lower fixing block A and the lower fixing block B are respectively embedded and fixed in the lower fixing plate A and the lower fixing plate B, and the lower parts of the product positioning nail A and the product positioning nail B are respectively embedded and fixed in the corresponding lower fixing block A and the lower fixing block B;

the pier stud A and the product positioning stud A; and the pier head nail B and the product positioning nail B are arranged oppositely along the longitudinal direction respectively, and the chain hollow rivet of the pier head is processed and molded through the first station and the second station.

Preferably, the lower end of the pier stud A comprises a first positioning part which is located at the center of the lower end and protrudes downwards, and a first annular inclined surface which surrounds the outer side of the first positioning part, the height of the outer edge of the first annular inclined surface is higher than that of the inner edge of the first annular inclined surface, the shape and the size of the first positioning part are matched with the diameter of the upper end opening of the chain hollow rivet, and the first annular inclined surface is used for extruding the side wall of the upper end opening of the chain hollow rivet and enabling the outer edge of the first positioning part to be turned to an angle matched with the first annular inclined surface.

Preferably, the included angle between the first annular inclined plane and the horizontal plane is 2 degrees.

Preferably, the lower end of the pier stud B comprises a second positioning part which is positioned in the center of the lower end and protrudes downwards, and a second annular inclined surface which surrounds the second positioning part, the height of the outer edge of the second annular inclined surface is lower than that of the inner edge, the shape and the size of the second positioning part are matched with the diameter of the upper end opening of the chain hollow rivet, and the second annular inclined surface is used for extruding the everted side wall of the chain hollow rivet and flattening the everted side wall at a designated position matched with the second annular inclined surface.

Preferably, the included angle between the second annular inclined surface and the horizontal plane is 2.5 degrees.

The chain hollow rivet pier head die has the following beneficial effects: the die provided by the invention has the advantages that the two procedures of preliminary upsetting of the chain hollow rivet and subsequent flattening are completely finished in one set of die through precise structural design, so that the working efficiency is improved, and the product quality is ensured.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is a plan layout view of the present invention;

FIG. 3 is a schematic illustration of a side structure of the present invention;

FIG. 4: the process principle of the invention is shown schematically;

FIG. 5 is a schematic view showing a structural change of a chain blind rivet before and after processing in the embodiment;

01: first station, 02: second station, 03: chain blind rivet, 1: upper die holder, 2: upper cushion plate a, 3: upper fixing plate a, 4: lower fixing plate a, 5: lower bolster a, 6: lower die holder, 7: upper cushion plate B, 8: upper fixing plate B, 9: lower fixing plate B, 10: a lower base plate B; 11: lower fixed block B, 12: chain, 13: pier stud a, 14: pier stud B, 15: spacing post, 16: a guide pillar and a guide sleeve; 17: fixing pin, 18: upper die fixing bolt, 19: lower die fixing bolt, 20: product positioning pin B, 21: chain attachment plate, 22: gasket, 23: product positioning pin a, 24: lower fixed block a, 25: first positioning portion, 26: first annular ramp, 27: second positioning portion, 28: a second annular chamfer.

Detailed Description

In the following, embodiments of the present invention are described in detail in a stepwise manner, which is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are only used for describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation and a specific orientation configuration and operation, and thus, the present invention is not to be construed as being limited thereto.

A chain hollow rivet pier head mould is shown in figures 1-3 and comprises an upper mould and a lower mould which are matched with each other, wherein the upper mould comprises an upper mould base 1, the lower mould comprises a lower mould base 6, and a first station 01 is formed between the upper mould base 1 and the lower mould base 2 through an upper padding plate A2, an upper fixing plate A3, a pier head nail A13, a product positioning nail A23, a lower fixing block A24, a lower fixing plate A4 and a lower padding plate A5; a second station 02 is formed by an upper padding plate B7, an upper fixing plate B8, a pier stud B14, a product positioning stud B20, a lower fixing block B11, a lower fixing plate B9 and a lower padding plate B10;

the upper fixing plate A3 and the upper cushion plate A2, and the upper fixing plate B8 and the upper cushion plate B7 are respectively fixedly connected with the upper die holder 1 through an upper die fixing bolt 18, and the upper parts of the pier stud A13 and the pier stud B14 are respectively embedded and fixed in the upper fixing plate A3 and the upper fixing plate B8; the lower cushion plate A5 and the lower fixing plate A4, the lower cushion plate B10 and the lower fixing plate B9 are fixedly connected with the lower die base 6 through lower die fixing bolts 19 respectively, the lower parts of the lower fixing block A24 and the lower fixing block B11 are embedded and fixed in the lower fixing plate A4 and the lower fixing plate B9 respectively, and the lower parts of the product positioning nail A23 and the product positioning nail B20 are embedded and fixed in the corresponding lower fixing block A24 and the lower fixing block B11 respectively;

the pier stud A13 and the product positioning stud A23; the pier head nail B14 and the product positioning nail B20 are oppositely arranged along the longitudinal direction respectively, and the chain hollow rivet 03 to be processed and formed at the pier head is processed and formed at the first station 01 and the second station 02;

as shown in fig. 4, the lower end of the pier stud a13 includes a first positioning portion 25 located at the center of the lower end and protruding downward, and a first annular inclined surface 26 surrounding the first positioning portion 25, the height of the outer edge of the first annular inclined surface 26 is higher than the height of the inner edge, the shape and size of the first positioning portion match the diameter of the upper end opening of the chain pop rivet 03, and the first annular inclined surface 26 is used for pressing the side wall of the upper end opening of the chain pop rivet 03 and turning the side wall outward to an angle matching the first annular inclined surface 26;

as shown in fig. 4, the included angle between the first annular inclined surface 26 and the horizontal plane is 2 °;

as shown in fig. 4, the lower end of the pier stud B14 comprises a second positioning portion 27 located at the center of the lower end and protruding downward, and a second annular inclined surface 28 surrounding the second positioning portion 27, the height of the outer edge of the second annular inclined surface 28 is lower than that of the inner edge, the shape and size of the second positioning portion 27 match the diameter of the upper end opening of the chain blind rivet 03, and the second annular inclined surface 28 is used for pressing the everted side wall of the chain blind rivet 03 and flattening the everted side wall at a designated position matching the second annular inclined surface 28;

as shown in fig. 4, the angle between the second annular inclined surface 28 and the horizontal plane is 2.5 °.

The working principle of the invention is as follows:

as shown in fig. 1 and 5, the chain 12 is provided with a chain attachment plate 21, a chain hollow rivet 03 is inserted from the lower end of the attachment plate hole, the upper end of the chain hollow rivet 03 is positioned above the attachment plate hole, and a gasket 22 is surrounded around the attachment plate hole; as shown in fig. 2 and 4, at the first station 01, preliminary heading is performed by heading nail a13, and at the second station 02, subsequent flattening is performed by heading nail B14. During preliminary heading, the first positioning part 25 of the heading nail A13 positions the chain blind rivet 03 from the upper end, the product positioning nail A23 positions the chain blind rivet 03 from the lower end, and after positioning, the first annular inclined surface 26 extrudes the side wall of the upper opening of the chain blind rivet 03 and enables the side wall to be turned outwards to an angle matched with the first annular inclined surface 26; as shown in fig. 4, the outward turning angle is 2 degrees between the surface of the side wall of the chain hollow rivet 03 and the horizontal plane; the chain hollow rivet 03 behind the preliminary pier head moves to the second station 02, the second positioning portion 27 positions the chain hollow rivet 03 from the upper end, the product positioning nail B20 positions the chain hollow rivet 03 from the lower end, after positioning, as shown in FIGS. 4 and 5, the second annular inclined surface 28 extrudes the flanging edge of the upper end opening of the chain hollow rivet 03, so that the lower surface of the flanging edge is attached to the upper surface of the gasket 22, and at the moment, all the procedures of the preliminary pier head and subsequent flattening of the chain hollow rivet 03 are completed.