Cold heading die structure of stainless steel bearing surface projection welding bolt

Abstract

The utility model relates to the field of cold heading dies, in particular to a cold heading die structure of a stainless steel bearing surface projection welding bolt, which comprises a first-order strong beam die, a second-order pre-forming die and a third-order forming die which are arranged in sequence, and the third-order forming die comprises a third-order stamping die and a third-order main die. The third-sequence main mold comprises a third-sequence main mold shell, a third-sequence main mold bolt, a third-sequence main mold ejector pin and a third-sequence main mold core, the third-sequence main mold core is arranged in the third-sequence main mold shell, the third-sequence main mold bolt is arranged at the lower end of the third-sequence main mold shell, and the third-sequence main mold core comprises a main mold core upper section, a main mold core middle section and a main mold core lower section which are sequentially arranged downwards; a first bolt upper section machining channel is formed in the main mold core upper section, a second bolt middle section machining channel is formed in the main mold core middle section, and a third bolt lower section machining channel is formed in the main mold core lower section. The third-sequence main die ejector pin sequentially penetrates through the third-sequence main die bolt, the third bolt lower section machining channel, the second bolt middle section machining channel and the first bolt upper section machining channel upwards.

Description

TECHNICAL FIELD

[0001] The utility model relates to cold header die field relates to a kind of cold header die structure of stainless steel bearing face projection welding bolt. BACKGROUND

[0002] SUS304 stainless steel, as a kind of widely used austenitic stainless steel material, is known for its good corrosion resistance, heat resistance, low temperature strength and mechanical characteristics. However, there are indeed some challenges in manufacturing stainless steel bearing face projection welding bolt, mainly including forming difficulty and easy cracking problem.

[0003] Therefore, in order to solve the deficiency in the prior art, a cold header die structure of stainless steel bearing face projection welding bolt with simple structure needs to be designed. SUMMARY

[0004] The utility model discloses to solve the prior art problem, provide a kind of cold header die structure of stainless steel bearing face projection welding bolt.

[0005] The utility model discloses a kind of cold header die structure of stainless steel bearing face projection welding bolt, including sequentially arranged one sequence strong beam die, two sequence preforming die and three sequence forming die, the three sequence forming die includes three sequence punch and three sequence main mode, the three sequence main mode includes three sequence main mode shell, three sequence main mode bolt, three sequence main mode needle and three sequence main mode core, the three sequence main mode core is arranged in three sequence main mode shell interior, the three sequence main mode bolt is arranged in three sequence main mode shell lower end, the three sequence main mode core includes sequentially downwardly arranged main mode core upper section, main mode core middle section and main mode core lower section, the main mode core upper section interior is equipped with bolt upper section processing channel one, the main mode core middle section interior is equipped with bolt middle section processing channel two, the main mode core lower section interior is equipped with bolt lower section processing channel three, the three sequence main mode needle sequentially passes three sequence main mode bolt, bolt lower section processing channel three, bolt middle section processing channel two and bolt upper section processing channel one upwards.

[0006] Further improvement, the two sequence preforming die includes two sequence punch and two sequence main mode, the two sequence punch lower end is equipped with two sequence punch piece, the two sequence main mode includes two sequence main mode shell, two sequence main mode bolt, two sequence main mode needle, two sequence main mode core and two sequence main mode piece, the two sequence main mode piece is arranged in two sequence main mode shell interior, the two sequence main mode core is arranged in two sequence main mode shell interior, the two sequence main mode bolt is arranged in two sequence main mode shell lower end, the two sequence main mode needle sequentially passes two sequence main mode bolt, two sequence main mode core and two sequence main mode piece upwards.

[0007] Further improvement, the one sequence strong beam die includes one sequence punch and one sequence main die, the one sequence punch is provided with punch one at the lower end, the one sequence main die is internally provided with processing channel one, the punch one extends into the processing channel one, the one sequence main die is internally provided with one sequence main die ejector pin, the one sequence main die ejector pin extends into the processing channel one.

[0008] Compared with the prior art, the cold heading die structure of the stainless steel face projection welded bolt has the beneficial effects that:

[0009] The three sequence main die core is split into three sections of upper, middle and lower main die core from the traditional whole section structure; under this new structure, the head welding point and the bolt tail are in different parts, and at the two sequence head pre-upset forming stage, the size selection will affect whether the three sequence forming bolt head welding point edge will crack, successfully solving the problems of SUS304 stainless steel material forming difficulty, easy cracking and high die machining difficulty, ensuring the product size precision and appearance without cracks and other defects; the three sequence main die core is changed from the traditional whole section structure to the upper, middle and lower three section structure, if the welding point part is damaged, it can be purchased alone, thereby greatly reducing the cost caused by die wear and tear, and reducing the cost. BRIEF DESCRIPTION OF DRAWINGS

[0010] Fig. 1 It is a structure schematic view of the one sequence strong beam die in the utility model

[0011] Fig. 2 It is a structure schematic view of the two sequence strong beam die in the utility model

[0012] Fig. 3 It is a structure schematic view of the three sequence strong beam die in the utility model

[0013] Fig. 4 It is a structure schematic view of the three sequence main die core in the utility model

[0014] In the drawing, 1 is one sequence strong beam die, 11 is one sequence punch, 111 is punch one, 12 is one sequence main die, 121 is processing channel one, 13 is one sequence main die ejector pin, 2 is two sequence pre-forming die, 21 is two sequence punch, 211 is two sequence punch sheet, 22 is two sequence main die, 23 is two sequence main die shell, 24 is two sequence main die bolt, 25 is two sequence main die ejector pin, 26 is two sequence main die core, 27 is two sequence main die sheet, 3 is three sequence forming die, 31 is three sequence punch, 32 is three sequence main die, 33 is three sequence main die shell, 34 is three sequence main die bolt, 35 is three sequence main die ejector pin, 36 is three sequence main die core, 361 is upper main die core, 3611 is upper bolt processing channel one, 362 is middle main die core, 3621 is middle bolt processing channel two, 363 is lower main die core, 3631 is lower bolt processing channel three. DETAILED DESCRIPTION

[0015] In the description of the utility model, it is explained that, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0016] In the description of the utility model, it is explained that, the terms "installation", "connection", "connection" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected.

[0017] The following will be described in combination with the embodiments and drawings Figs. 1-4 The technical scheme of the utility model will be further described.

[0018] Example 1

[0019] A cold heading die structure of a stainless steel surface convex welding bolt, comprising a first sequence strong beam die 1, a second sequence preforming die 2 and a third sequence forming die 3 arranged in sequence, the third sequence forming die 3 comprises a third sequence punch 31 and a third sequence main die 32, the third sequence main die 32 comprises a third sequence main die shell 33, a third sequence main die bolt 34, a third sequence main die ejector pin 35 and a third sequence main die core 36, the third sequence main die core 36 is arranged inside the third sequence main die shell 33, the third sequence main die bolt 34 is arranged at the lower end of the third sequence main die shell 33, the third sequence main die core 36 comprises a main die core upper section 361, a main die core middle section 362 and a main die core lower section 363 arranged in sequence downward, the main die core upper section 361 is internally provided with a bolt upper section machining channel one 3611, the main die core middle section 362 is internally provided with a bolt middle section machining channel two 3621, the main die core lower section 363 is internally provided with a bolt lower section machining channel three 3631, the third sequence main die ejector pin 35 passes through the third sequence main die bolt 34, the bolt lower section machining channel three 3631, the bolt middle section machining channel two 3621 and the bolt upper section machining channel one 3611 in sequence upward.

[0020] As a further preferred embodiment, the two-order preforming die 2 comprises a two-order punch die 21 and a two-order main die 22, the two-order punch die 21 is provided with a two-order punch die sheet 211 at the lower end, the two-order main die 22 comprises a two-order main die shell 23, a two-order main die bolt 24, a two-order main die ejector pin 25, a two-order main die core 26 and a two-order main die sheet 27, the two-order main die sheet 27 is arranged inside the two-order main die shell 23, the two-order main die core 26 is arranged inside the two-order main die shell 23, the two-order main die bolt 24 is arranged at the lower end of the two-order main die shell 22, and the two-order main die ejector pin 25 passes through the two-order main die bolt 24, the two-order main die core 26 and the two-order main die sheet 27 in sequence upwards.

[0021] As a further preferred embodiment, the one-order strong beam die 1 comprises a one-order punch die 11 and a one-order main die 12, the one-order punch die 11 is provided with a punch one 111 at the lower end, the one-order main die 12 is internally provided with a machining channel one 121, the punch one 111 extends into the machining channel one 121, and the one-order main die 12 is internally provided with a one-order main die ejector pin 13, which extends into the machining channel one 121.

[0022] As Figs. 1-4 shown, the use principle of the utility model is as follows: first, the one-order strong beam die 1 is used for strong beam of the stainless steel bearing surface projection welding bolt; the two-order preforming die 2 is used for preheading operation of the head of the stainless steel bearing surface projection welding bolt, and the two-order main die sheet 27 and the two-order punch die sheet 211 are used for forming the heading step; then, the three-order forming die 3 is used for three-order forming, and the heading forming of the head and the welding point is completed in the three-order, the three-order main die core 36 is split into a main die core upper segment 361, a main die core middle segment 362 and a main die core lower segment 363 from the traditional whole segment structure; under the new structure, the head welding point and the bolt tail are in different parts, and at the same time, in the two-order head preheading forming stage, the size selection will affect whether the bolt head welding point edge appears cracking during the three-order forming, successfully solving the problems of SUS304 stainless steel material forming difficulty, easy cracking and high die machining difficulty, ensuring that the product size is accurate and the appearance is free of cracks and other defects; the three-order main die core is changed from the traditional whole segment structure into an upper, middle and lower three-segment structure, if the welding point part is damaged, it can be purchased separately, thereby greatly reducing the cost caused by die wear and tear, and reducing the cost.

[0023] The preferred embodiments of the utility model are described in detail above. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the utility model. Therefore, any technical scheme obtained by logical analysis, reasoning or limited experiment on the basis of the prior art according to the concept of the utility model shall be within the protection scope determined by the claims.

Claims

1. A cold heading die structure for a stainless steel face upset bolt, characterized by, The first-order strong beam die, the second-order preforming die and the third-order forming die are sequentially arranged, the third-order forming die comprises a third-order punch and a third-order main die, the third-order main die comprises a third-order main die shell, a third-order main die bolt, a third-order main die ejector pin and a third-order main die core, the third-order main die core is arranged inside the third-order main die shell, the third-order main die bolt is arranged at the lower end of the third-order main die shell, the third-order main die core comprises a main die core upper section, a main die core middle section and a main die core lower section arranged sequentially downwards, the main die core upper section is internally provided with a bolt upper section machining channel one, the main die core middle section is internally provided with a bolt middle section machining channel two, and the main die core lower section is internally provided with a bolt lower section machining channel three, and the third-order main die ejector pin sequentially passes through the third-order main die bolt, the bolt lower section machining channel three, the bolt middle section machining channel two and the bolt upper section machining channel one upwards.

2. A cold heading die structure for a stainless steel face projection bolt according to claim 1, characterized in that, The second-order preforming die comprises a second-order punch and a second-order main die, the second-order punch is provided with a second-order punch sheet at the lower end, and the second-order main die comprises a second-order main die shell, a second-order main die bolt, a second-order main die ejector pin, a second-order main die core and a second-order main die sheet, the second-order main die sheet is arranged inside the second-order main die shell, the second-order main die core is arranged inside the second-order main die shell, the second-order main die bolt is arranged at the lower end of the second-order main die shell, and the second-order main die ejector pin sequentially passes through the second-order main die bolt, the second-order main die core and the second-order main die sheet upwards.

3. A cold heading die structure for a stainless steel face projection bolt according to claim 1, characterized in that, The first-order strong beam die comprises a first-order punch and a first-order main die, the first-order punch is provided with a punch one at the lower end, the first-order main die is internally provided with a machining channel one, the punch one extends into the machining channel one, the first-order main die is internally provided with a first-order main die ejector pin, and the first-order main die ejector pin extends into the machining channel one.

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