CN209935792U - One-step forming die for long-specification bolt head height - Google Patents
One-step forming die for long-specification bolt head height Download PDFInfo
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- CN209935792U CN209935792U CN201920437440.1U CN201920437440U CN209935792U CN 209935792 U CN209935792 U CN 209935792U CN 201920437440 U CN201920437440 U CN 201920437440U CN 209935792 U CN209935792 U CN 209935792U
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Abstract
The utility model discloses a high one shot forming mould of long specification bolt head, including preliminary forming die, preforming mould and bolt head forming die, wherein: the cover half of preforming mould and bolt head forming die all can be dismantled in mould shell one end set up piece die package steel, install the piece mould in piece die package steel, locate the mould shell with the centre form in and lead to piece die package steel and sealing end face support tight location, preforming mould and bolt head forming die's movable mould all includes movable mould board and drift, bolt head forming die's movable mould still sets up the excellent towards that stretches out the drift outside in the drift and is used for forming bolt head spanner groove, the utility model discloses reduce manufacturing cost and human cost, improved change efficiency, improved the product quality greatly, guaranteed bolt head height stable, avoid the product to scrap.
Description
Technical Field
The utility model relates to a technical field of screw processing especially indicates a high one shot forming mould of long specification bolt head.
Background
When the traditional slender bolt is formed by multi-station automatic cold heading, due to the hardness, the thickness and the ellipse of the outer diameter of the wire, when the common die is used for continuous production due to the addition of multiple overmoldings and the like, the head height can be controlled within a specified range, however, once the length is more than 150mm, the above factors of the wire rods are superposed, the height of the bolt head is extremely unstable, the height is suddenly lowered, the bolt head is difficult to control, customer complaints are frequent, the product scrappage is high, and the traditional bolt forming die has the advantages that the sheet die is directly arranged on the die shell, the sheet die is a quick-wear part and is pressed, the die shell is easy to crack, the die is not smoothly exhausted, the thickness of the sheet die in one specification is equal to that of the die shell, the whole die shell needs to be replaced when the sheet die is damaged, and bolts in different specifications need to be replaced together with the die shell during forming, so that the die material and labor are consumed, the replacement is inconvenient, and the production efficiency is influenced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects, the utility model provides a high one shot forming mould of long specification bolt head, this high one shot forming mould of long specification bolt head's simple structure, the commonality is high, practices thrift manufacturing cost, can successfully be greater than the high effective control of long and thin bolt head of 150mm in tolerance range with length, and product quality is stable, and mechanical properties is good.
The utility model discloses a solve the technical scheme that its technical problem adopted: the utility model provides a high one shot forming die of long specification bolt head, includes preliminary forming die, preforming mould and bolt head forming die, wherein:
the preforming die comprises a preforming fixed die and a preforming movable die, wherein the preforming fixed die comprises a first die shell, a first inner die, a first sheet die, first sheet die package steel and a first seal head, the first die-coated steel sheet can be detachably and fixedly inserted into the inner side of one end of a first die shell, the first die is fixedly inserted into the inner side of the first die-coated steel sheet, a bolt head preforming cavity is formed in the inner side of the first die, a first inner die is inserted into the first die shell, a stud part preforming cavity of a bolt is formed in the inner side of the first inner die, a first seal head can be detachably and fixedly inserted into the other end of the first die shell, two ends of the first inner die are respectively and tightly abutted against the first die-coated steel sheet and the end face of the first seal head, a preforming movable die comprises a first movable die plate and a first punch head, the first punch head can be detachably and fixedly inserted into the inner side of one end of the first movable die plate, and the first punch head is;
the bolt forming die comprises a bolt forming fixed die and a bolt forming movable die, wherein the bolt forming fixed die comprises a second die shell, a second inner die, a second sheet die steel and a second seal head, the second sheet die steel can be detachably and fixedly inserted into the inner side of one end of the second die shell, the second sheet die can be detachably and fixedly inserted into the inner side of the second sheet die steel, the inner side of the second sheet die forms a bolt head forming cavity, the second inner die is inserted into the second die shell, the inner side of the second inner die forms a stud part forming cavity of the bolt, the second seal head can be detachably and fixedly inserted into the other end of the second die shell, two ends of the second inner die are respectively and tightly abutted against the end surfaces of the second sheet die steel and the second seal head, the bolt forming movable die comprises a second movable die plate, a second punch head and a punching rod, the second punch head can be detachably and fixedly inserted into the inner side of one end of the second movable die plate, and the second punch head is just opposite to the, the punch rod can be detached and fixedly inserted into the second punch head, the punch rod extends out of the second punch head and faces one side of the second sheet die for a set distance, and the part of the punch rod extending out of the second punch head forms a wrench groove forming head matched with the shape of a wrench groove at the head of the bolt.
As a further improvement of the present invention, the first punch forms an inner concave ring structure with a round both sides wall as an inclined plane on the surface toward the first sheet die.
As the utility model discloses a further improvement, first drift is located inner notch ring structure inside part towards first section mould one end and forms central boss, and this central boss exceeds the first movable mould board outside and sets for the distance.
As the utility model discloses a further improvement, the one end of second movable mould board dorsad second drift is formed with the step hole, this step hole dorsad second drift one end diameter is greater than and is close to drift one end diameter, towards excellent one end and be formed with the outer stair structure who expands of diameter, this stair structure just can insert in the big one end of step hole diameter who locates the second movable mould board, and towards the stair structure stop of excellent on the step face in second movable mould step hole, still be equipped with a cushion, fixed the inserting that the cushion can be dismantled is located in the big one end of second movable mould board step hole diameter, and the cushion tightly supports on the excellent stair structure terminal surface that dashes.
As a further improvement of the utility model, the diameter of the punch rod is close to the diagonal size of the forming head of the wrench groove.
As a further improvement of the utility model, the height of the second sheet die is less than the height of the bolt head by 1.5-2.0 mm.
As a further improvement, the first piece die and the first piece die steel are fixedly spliced through the conical surface, and the second piece die steel are also fixedly spliced through the conical surface.
As a further improvement of the utility model, first mould shell and second mould shell one end form the stair structure that the diameter contracts in respectively, first slice die package steel and second piece die package steel circumference outside form the step face that one end diameter is less than the other end diameter, step face between first slice die package steel and the second piece die package steel both ends just backstop on the stair structure of first mould shell and second mould shell one end, first centre form and second centre form one end form the step tip that the external diameter contracts respectively, first centre form and second centre form one end just insert locate first slice die package steel and second piece die package steel in, the step face that first centre form and second centre form one end formed just tightly supports on first slice die package steel and the second piece die package steel other end terminal surface.
As a further improvement of the utility model, a flower tooth structure or a smooth surface structure is formed in the second sheet die.
As a further improvement, first head and second head are T shape structure respectively, and the mode that threaded connection was passed through to the little one end of first head and second head diameter is connected with the first mould shell and the second mould shell other end, and on the big one end of first head and second head diameter tightly supported first mould shell and second mould shell other end terminal surface respectively, still be formed with the through-hole that communicates with the centre form inboard on first head and the second head.
The utility model has the advantages that: the utility model realizes the common use of the mould shell by arranging the piece mould steel in the mould shell in a detachable way and installing the piece mould on the piece mould steel, when the sheet die is damaged and the bolt type is replaced, the die shell does not need to be replaced, the production cost and the labor cost are reduced, the replacement efficiency is improved, meanwhile, the punch of the preforming die is designed into a central convex structure, so that the bolt forms a positioning groove in the preforming stage, the centering and positioning are facilitated during forming, the bolt forming precision is greatly improved, the punch of the bolt forming die is designed into a thin rod structure with steps, the chamfer in the head wrench groove is smooth and has no step when the surface bolt is formed, the product quality is greatly improved, a sheet die of the bolt forming die is designed into a structure thinner than the height of a bolt head, the effective control on the height of the bolt forming head is realized, the height stability of the bolt head is ensured, and the product scrapping is avoided.
Drawings
FIG. 1 is a front view of an elongated bolt;
FIG. 2 is a left side view of the elongated bolt;
FIG. 3 is a schematic diagram of a prior art preform mold configuration;
FIG. 4 is an enlarged view of portion A of FIG. 3;
FIG. 5 is a schematic diagram of a bolt forming mold in the prior art;
FIG. 6 is a schematic diagram of the structure of the preforming mold of the present invention;
FIG. 7 is an enlarged view of portion B of FIG. 6;
fig. 8 is the structural schematic diagram of the bolt forming mold of the utility model.
Detailed Description
Example (b): the utility model provides a high one shot forming die of long specification bolt head, includes preliminary forming die, preforming mould and bolt head forming die, wherein:
the preforming die comprises a preforming fixed die and a preforming moving die, wherein the preforming fixed die comprises a first die shell 1, a first inner die 2, a first sheet die 3, first sheet die steel 4 and a first seal head 5, the first sheet die steel 4 can be detachably and fixedly inserted into the inner side of one end of the first die shell 1, the first sheet die 3 is fixedly inserted into the inner side of the first sheet die steel 4, a bolt head preforming cavity is formed in the inner side of the first sheet die 3, the first inner die 2 is inserted into the first die shell 1, a stud part preforming cavity of a bolt is formed in the inner side of the first inner die 2, the first seal head 5 can be detachably and fixedly inserted into the other end of the first die shell 1, two ends of the first inner die 2 respectively tightly abut against the end faces of the first sheet die steel 4 and the first seal head 5, the preforming moving die comprises a first moving die plate 6 and a first punch 7, the first punch 7 can be detachably and fixedly inserted into one end of the first, the first punch 7 is just coaxially opposite to the first sheet die 3;
the bolt forming die comprises a bolt forming fixed die and a bolt forming movable die, wherein the bolt forming fixed die comprises a second die shell 8, a second inner die 9, a second sheet of die steel 10, a second sheet of die steel 11 and a second seal head 12, the second sheet of die steel 11 can be detachably and fixedly inserted into the inner side of one end of the second die shell 8, the second sheet of die steel 10 can be detachably and fixedly inserted into the inner side of the second sheet of die steel 11, the inner side of the second sheet of die 10 forms a bolt head forming cavity, the second inner die 9 is inserted into the second die shell 8, the inner side of the second inner die 9 forms a stud part forming cavity of a bolt, the second seal head 12 can be detachably and fixedly inserted into the other end of the second die shell 8, two ends of the second inner die 9 respectively tightly abut against the end surfaces of the second sheet of die steel 11 and the second seal head 12, the bolt forming movable die comprises a second movable die plate 13, a second punch head 14 and a punch rod 15, the second punch head 14 can be detachably and fixedly inserted into the inner side of one, the second punch 14 is just coaxially opposite to the second sheet die 10, the punch rod 15 can be detachably and fixedly inserted into the second punch 14, the punch rod 15 extends out of the second punch 14 and faces one side of the second sheet die 10 for a set distance, and the part of the punch rod 15 extending out of the second punch 14 forms a wrench groove forming head 16 matched with the shape of a bolt head wrench groove.
When a long-specification bolt is formed, a three-die three-punching mode is adopted, firstly, a sheared wire is placed into a primary forming die for primary forming, the processes mainly comprise head primary heading, over-die and the like, the primary forming die adopted in the processes is the same as the conventional die structure for primary forming of the bolt, the description is omitted, the primarily formed bolt is placed into a pre-forming fixed die of the pre-forming die, a pre-forming movable die of the pre-forming die drives a first punch 7 to move to realize pre-forming of the stud part and the head part of the bolt, then, a pre-formed blank is placed into a bolt forming fixed die of the bolt forming die, a bolt forming movable die drives a second punch 14 and a punch rod 15 in the second punch 14 to move, so that the bolt forms a stud structure in the bolt forming fixed die, and a wrench groove of the bolt head part is formed through the punch rod 15, wherein the punch rod 15 can be a hexagon, Quadrangle, quincunx, dodecagon and so on, the second punch 14 slaps the bolt head face to form the control of the bolt head height, one end of the mould shell of the preforming mould and the bolt forming mould is designed into an open enlarged structure, sheet mould steel is arranged in one end of the mould shell, a sheet mould is arranged in the sheet mould steel, the outside diameter of the sheet mould steel is matched with the mould shell, the inside of the sheet mould is arranged according to the sheet moulds with different specifications, when the sheet mould is worn due to long-time use, the sheet mould and the sheet mould steel outside the sheet mould can be replaced without replacing the whole mould shell, the replacement difficulty is reduced, the replacement efficiency is improved, when producing bolts with different specifications, only the inner mould, the sheet mould steel and the sheet mould inside the sheet mould need to be replaced without replacing the mould shell, the structure is convenient to detach and replace, has wide applicability, can effectively save manpower and cost, the exhaust is convenient when the sheet mould steel is arranged in the mould shell, the expansion forming difficulty of the rod part caused by the slender bolt is avoided, and the bolt rod diameter is ensured to expand to the specified size range in the forming process.
The first punch 7 forms a ring of inner concave ring structure 17 with two side walls as inclined surfaces on the surface facing to one end of the first sheet die 3. When the bolt is preformed, the center positioning mark is formed on the head of the bolt in advance, so that the subsequent wrench groove is formed on the head of the bolt conveniently, and meanwhile, the chamfer structure is formed on the outer edge of the head of the bolt by the structure.
The end of the first punch 7 facing the first die 3, which is positioned at the inner part of the inner concave ring structure 17, forms a central boss 18, and the central boss 18 is higher than the outer side of the first movable die plate 6 by a set distance 23. The central boss 18 is higher than the outer side of the first movable mould plate 6, the height of an inclined plane of the inner concave ring structure 17 facing one side of the central boss 18 is effectively improved, namely, the area of a supporting surface is improved, meanwhile, the central boss 18 is higher than the first movable mould plate 6, when a bolt is preformed, a positioning groove is formed at the head of the bolt, the positioning groove can position and guide a punching rod 15 for bolt forming, a good foundation is laid for bolt head forming during subsequent bolt forming, and the bolt head forming precision in the bolt forming step is improved.
The end, back to the second punch 14, of the second movable die plate 13 is provided with a step hole, the diameter of the end, back to the second punch 14, of the step hole is larger than that of the end, close to the punch, of the step hole, the diameter of the end, back to the second punch 14, of the step hole is larger than that of the end, with the diameter expanded outwards, of the punch rod 15 is provided with a step structure 19, the step structure 19 of the punch rod 15 can be just inserted into the end, with the diameter larger than that of the step hole, of the second movable die plate 13, the step structure 19 of the punch rod 15 is stopped on the step surface of the step hole of the second movable die, the movable die plate is further provided with a cushion block 20, the cushion block. The punch rod 15 is made into a structure with a back step, the fixing precision of the punch rod and the second punch 14 is high, the concentricity with the die is good, the assembly and disassembly are convenient, and the labor is saved.
The punch pin 15 has a diameter close to the diagonal dimension of the key slot forming head 16. The punching rod 15 is designed into a thin rod structure with a rear step, the diameter of the punching rod 15 is close to the diagonal size of the wrench groove forming head 16, so that when the bolt forming punch head is in a head beating shape, the step cannot occur on the chamfer in the bolt wrench groove, and the chamfer is smooth.
The height 21 of the second sheet die is 1.5-2.0mm smaller than the height of the bolt head. The second die 10 is designed to be thinner than the bolt head, the second punch 14 is punched on the wrench groove to flap the head surface during production, and when the head height of the bolt is flapped, the bolt head height can be effectively controlled within a specified range, chamfer smoothness of the wrench groove is guaranteed, and product quality is stable.
The first sheet die 3 and the first sheet die steel 4 are fixedly spliced through a conical surface, and the second sheet die 10 and the second sheet die steel 11 are also fixedly spliced through a conical surface. Through the grafting of toper face, the toper face is close to centre form one side diameter greatly, receives centre form top tension effect like this to have realized the stable connection of piece mould and piece mould package steel, avoids the piece mould to break away from in the piece mould package steel, except adopting above-mentioned structure to realize the fixed positioning of piece mould package steel and piece mould, the piece mould also can be through spiro union, riveting, welding etc. formation and piece mould package steel fixed positioning, this for the equal alternative structure that this technical personnel in the field think very easily according to this patent.
One end of each of the first formwork 1 and the second formwork 8 forms a stepped structure with the diameter shrinking inwards, the outer sides of the circumferences of the first piece of formwork steel 4 and the second piece of formwork steel 11 form a stepped surface with the diameter smaller than that of the other end, the stepped surface between the two ends of the first piece of formwork steel 4 and the second piece of formwork steel 11 just stops on the stepped structure at one end of each of the first formwork 1 and the second formwork 8, one end of each of the first inner die 2 and the second inner die 9 forms a stepped end part with the contracted outer diameter, one end of each of the first inner die 2 and the second inner die 9 is just inserted into the corresponding one end of each of the first piece of formwork steel 4 and the second piece of formwork steel 11, and the stepped surface formed at one end of each of the first inner die 2 and the second inner die 9 just tightly abuts on the end surface at the other end of each of the first piece of formwork. The outer side surface of the piece die steel wrap forms a step structure, the step surface of the piece die steel wrap is clamped between the die shell and the inner die, the fixed connection of the steel wrap and the die shell is formed, the axial stop positioning of the inner die is realized, the inner side of the piece die steel wrap forms an inner hole for the inner die to be inserted, the butt joint of the inner die and the piece die is ensured, the positioning of the inner die is realized, the inner die and the piece die are communicated, except for adopting the structure to realize the fixed positioning of the piece die steel wrap and the die shell, the piece die steel wrap can also form the fixed positioning with the die shell through screw joint or riveting and the like, and the structure is an equivalent replacement structure which can be easily thought by the technical personnel in.
A flower tooth structure 22 or a smooth surface structure is formed in the second sheet die 10.
The first seal head 5 and the second seal head 12 are of T-shaped structures respectively, one end of the first seal head 5 with a small diameter and the second seal head 12 with a small diameter is connected with the other ends of the first formwork shell 1 and the second formwork shell 8 in a threaded connection mode, one end of the first seal head 5 with a large diameter and one end of the second seal head 12 with a large diameter are tightly abutted to the end faces of the other ends of the first formwork shell 1 and the second formwork shell 8 respectively, and through holes communicated with the inner side of the inner formwork are formed in the first seal head 5 and the second seal head 12. The positioning of the inner die is realized through the threaded connection of the end socket and the die shell, and the threaded connection structure is convenient to install, disassemble and adjust.
Claims (10)
1. The utility model provides a high one shot forming mould of long specification bolt head which characterized in that: including preliminary forming die, preforming mould and bolt head forming die, wherein:
the preforming die comprises a preforming fixed die and a preforming movable die, wherein the preforming fixed die comprises a first die shell (1), a first inner die (2), a first sheet die (3), first sheet die steel (4) and a first seal head (5), the first sheet die steel can be disassembled and fixedly inserted into one end inner side of the first die shell, the first sheet die is fixedly inserted into the inner side of the first sheet die steel, a bolt head preforming cavity is formed in the inner side of the first sheet die, the first inner die is inserted into the first die shell, a stud part preforming cavity of a bolt is formed in the inner side of the first inner die, the first seal head can be disassembled and fixedly inserted into the other end of the first die shell, two ends of the first inner die are respectively and tightly abutted against the end faces of the first sheet die steel and the first seal head, the preforming movable die comprises a first movable die plate (6) and a first punch head (7), the first punch head can be disassembled and fixedly inserted into one end inner side of, the first punch is just coaxially opposite to the first sheet die;
the bolt forming die comprises a bolt forming fixed die and a bolt forming movable die, wherein the bolt forming fixed die comprises a second die shell (8), a second inner die (9), a second sheet die (10), a second sheet of die-coated steel (11) and a second seal head (12), the second sheet of die-coated steel can be detachably and fixedly inserted into one end inner side of the second die shell, the second sheet die can be detachably and fixedly inserted into the inner side of the second sheet of die-coated steel, a bolt head forming cavity is formed in the inner side of the second sheet die, the second inner die is inserted into the second die shell, a stud part forming cavity of a bolt is formed in the inner side of the second inner die, the second seal head can be detachably and fixedly inserted into the other end of the second die shell, two ends of the second inner die respectively tightly abut against the second sheet of die-coated steel and the end face of the second seal head, the bolt forming movable die comprises a second movable die plate (13), a second punch head (14) and a punch rod (15), the second punch head can be detachably and fixedly inserted, the second punch is just coaxially opposite to the second sheet die, the punch rod can be detachably fixed and inserted into the second punch, the punch rod extends out of the second punch and faces one side of the second sheet die for a set distance, and the part of the punch rod extending out of the second punch forms a wrench groove forming head (16) matched with the shape of the wrench groove at the head of the bolt.
2. The long gauge bolt head height one shot forming die of claim 1, characterized in that: the surface of one end, facing the first sheet die, of the first punch forms a circle of inner concave ring structure (17) with two side walls as inclined surfaces.
3. The long gauge bolt head height one shot forming die of claim 2, characterized in that: one end of the first punch towards the first sheet die is positioned at the inner side part of the inner concave ring structure to form a central boss (18), and the central boss is higher than the outer side of the first movable die plate by a set distance (23).
4. The long gauge bolt head height one shot forming die of claim 1, characterized in that: one end of the second movable template, which is back to the second punch, is provided with a step hole, the diameter of one end of the step hole, which is back to the second punch, is larger than the diameter of one end of the punch, one end of the punch rod is provided with a step structure (19) with an outward expanded diameter, the step structure can be inserted into the end with the large diameter of the step hole of the second movable template, the step structure of the punch rod is stopped on the step surface of the step hole of the second movable template, the punch rod is further provided with a cushion block (20), the cushion block can be detached and fixedly inserted into the end with the large diameter of the step hole of the second movable template, and the cushion block tightly abuts against the end surface of the step.
5. The long gauge bolt head height one shot forming die of claim 4, characterized in that: the diameter of the punch rod is close to the diagonal size of the forming head of the wrench groove.
6. The long gauge bolt head height one shot forming die of claim 1, characterized in that: the height (21) of the second sheet die is 1.5-2.0mm smaller than the height of the bolt head.
7. The long gauge bolt head height one shot forming die of claim 1, characterized in that: the first piece die and the first piece die steel wrap are fixedly spliced through the conical surface, and the second piece die steel wrap are also fixedly spliced through the conical surface.
8. The long gauge bolt head height one shot forming die of claim 1, characterized in that: one end of the first formwork and one end of the second formwork form a step structure with the diameter contracting inwards respectively, the outer sides of the circumferences of the first piece of formwork steel and the second piece of formwork steel form step surfaces with the diameter of one end smaller than that of the other end, the step surfaces between the two ends of the first piece of formwork steel and the second piece of formwork steel are just stopped on the step structures at one end of the first formwork and one end of the second formwork, the step end parts with the contracted outer diameters are respectively formed at one end of the first inner formwork and one end of the second inner formwork, one end of the first inner formwork and one end of the second inner formwork are just inserted into the first piece of formwork steel and the second piece of formwork steel, and the step surfaces formed at one end of the first inner formwork and one end of the second inner formwork just tightly abut against the end surface of the other end.
9. The long gauge bolt head height one shot forming die of claim 1, characterized in that: and a flower tooth structure (22) or a smooth surface structure is formed in the second sheet die.
10. The long gauge bolt head height one shot forming die of claim 1, characterized in that: the first end socket and the second end socket are of T-shaped structures respectively, one end of the first end socket, which is small in diameter, of the second end socket is connected with the other ends of the first formwork shell and the second formwork shell in a threaded connection mode, one end of the first end socket, which is large in diameter, of the second end socket is tightly abutted to the end faces of the other ends of the first formwork shell and the second formwork shell respectively, and through holes communicated with the inner side of the inner die are formed in the first end socket and the second end socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920437440.1U CN209935792U (en) | 2019-04-02 | 2019-04-02 | One-step forming die for long-specification bolt head height |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920437440.1U CN209935792U (en) | 2019-04-02 | 2019-04-02 | One-step forming die for long-specification bolt head height |
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| CN209935792U true CN209935792U (en) | 2020-01-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109848353A (en) * | 2019-04-02 | 2019-06-07 | 宏茂五金(昆山)有限公司 | Long size bolt head height one-time-shaped mould |
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- 2019-04-02 CN CN201920437440.1U patent/CN209935792U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109848353A (en) * | 2019-04-02 | 2019-06-07 | 宏茂五金(昆山)有限公司 | Long size bolt head height one-time-shaped mould |
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