CN216540702U - Machining device for hexagonal flange face bolt and hexagonal flange face bolt - Google Patents
Machining device for hexagonal flange face bolt and hexagonal flange face bolt Download PDFInfo
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- CN216540702U CN216540702U CN202121980694.1U CN202121980694U CN216540702U CN 216540702 U CN216540702 U CN 216540702U CN 202121980694 U CN202121980694 U CN 202121980694U CN 216540702 U CN216540702 U CN 216540702U
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Abstract
The utility model is suitable for the technical field of machinery, provide a processing unit of the flange face bolt of angle and hexagonal flange face bolt, the processing unit also includes: the first station cold heading die comprises a first station upper die and a first station lower die; the first station upper die is provided with a first-order punch die cavity which extrudes one end of a prefabricated blank into a preformed head of the hexagon flange bolt; the first station lower die is provided with a first-order lower die cavity for extruding the other end of the cut material into a threaded blank diameter of the hexagon flange face bolt; the second station cold heading die comprises a second station upper die and a second station lower die; the second station upper die is provided with a second-order punch die cavity for extruding and expanding the preformed head of the hexagonal flange face bolt to form the hexagonal flange face head of the hexagonal flange face bolt; the second station lower die is provided with a second-order lower die cavity which is used for radially extruding the threaded blank into a chamfer angle at the tail end of the rod part of the bolt with the hexagonal flange surface. Therefore, the utility model realizes the lean production of the cold forming process of the hexagon flange bolt.
Description
Technical Field
The utility model relates to the technical field of machinery, in particular to a machining device for a hexagonal flange face bolt and the hexagonal flange face bolt.
Background
At present, the cold forming process of the hexagon flange bolt adopts four-step cold heading forming, such as fig. 1A-1G. Cutting; a first step of extruding and deforming the material 1 into a screw blank diameter 2; the second process is that the head of the bolt is upset and preformed into a preform 3; the third step is preforming upsetting hexagon, and is a preformed material 4; and a fourth step of upsetting a hexagonal head flange surface and chamfering the tail end of the bolt rod part to obtain a preformed material 5. The cold heading preforming of the head part through the second and third processes has serious cold work hardening phenomenon of the material, the strength of the material can be increased along with the increase of the deformation, the relative material flowability is poor, and the service life of a stamping die in the fourth process is adversely affected. And, the hexagonal head of bolt is planar structure, does not have the cave and subtracts heavy structure, and the material quantity is more. In mass production, the existing cold forming process is huge for the loss of the die and the loss of the material.
In summary, the existing technology for machining the hexagon flange bolt obviously has inconvenience and defects in practical use, so that improvement is needed.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects, the utility model aims to provide a processing device of an angle flange face bolt and a hexagon flange face bolt thereof so as to realize lean production of a cold forming process of the hexagon flange face bolt.
In order to achieve the purpose of the utility model, the utility model provides a machining device for a hexagon flange bolt, which comprises a cold header, and the machining device further comprises:
the first station cold heading die is arranged on the cold heading machine and used for executing first station cold heading machining, and comprises a first station upper die and a first station lower die; the first station upper die is provided with a first-order punch cavity which extrudes one end of a prefabricated blank into a preformed head of the hexagonal flange face bolt; the first station lower die is provided with a first-order lower die cavity for extruding the other end of the cut material into the diameter of a threaded blank of the hexagonal flange face bolt; after the cold heading processing of the first station is finished, a preformed die material of the hexagonal flange face bolt is manufactured;
the second station cold heading die is arranged on the cold heading machine and used for executing second station cold heading machining, and comprises a second station upper die and a second station lower die; the second station upper die is provided with a second-order punch die cavity for extruding and expanding the preformed head of the hexagonal flange face bolt to form the hexagonal flange face head of the hexagonal flange face bolt; the second station lower die is provided with a second-order lower die cavity which is used for radially extruding the threaded blank into a chamfer angle at the tail end of the rod part of the hexagonal flange face bolt; and after the cold heading processing of the second station is finished, manufacturing the hexagonal flange face bolt.
According to processingequipment, mould includes on the first station:
the first spring seat is fixed on the cold heading machine;
the first spring is sleeved on the first spring seat;
the first-order punch is arranged at the front end of the first spring seat, one end of the first-order punch is provided with a first upper die ejector rod cavity, and the other end of the first-order punch is provided with the first-order punch cavity;
the first upper die ejector rod is arranged at the front end of the first spring seat and is inserted into the first upper die ejector rod cavity;
the first-order punch sleeve is fixed on the cold heading machine and sleeved outside the first spring seat and the first-order punch; the first-sequence punch slides relative to the first-sequence punch sleeve;
according to processingequipment, first station lower mould includes:
the first lower die ejector rod seat is arranged at the rear end of the first station lower die and is fixed on the cold header;
the first lower die cushion block is arranged at the front end of the first lower die ejector rod seat, and a first channel cavity is formed in the first lower die cushion block;
the first-order lower die is arranged at the front end of the first station lower die, the front end of the first-order lower die is provided with the first-order lower die cavity, and the rear end of the first-order lower die is provided with the second channel cavity;
and the first lower die ejector rod extends out of the first lower die ejector rod seat, sequentially penetrates through the first channel cavity and the second channel cavity, and ejects the preformed die material after the first station cold heading processing is finished.
According to processingequipment, mould includes on the second station:
the second-order punch is fixed on the cold header; the rear end of the second-order punch head is provided with a cushion block die cavity, and the front end of the second-order punch head is provided with the second-order punch head die cavity;
the second spring is sleeved on the rear end of the second-order punch;
the second upper die cushion block is arranged in the cushion block die cavity and slides relative to the cushion block die cavity;
and the hexagonal push rod is arranged in the cushion block die cavity and is positioned at the front end of the second upper die cushion block.
According to processingequipment, the second station lower mould includes:
the second lower die ejector rod seat is arranged at the rear end of the second station lower die and is fixed on the cold header;
the second lower die cushion block is arranged at the front end of the second lower die ejector rod seat, and a third channel cavity is formed in the second lower die cushion block;
the second-sequence lower die is arranged at the front end of the second station lower die, the front end of the second-sequence lower die is provided with the second-sequence lower die cavity, and the rear end of the second-sequence lower die is provided with a fourth channel cavity;
and the second lower die ejector rod extends out of the second lower die ejector rod seat, sequentially penetrates through the third channel cavity and the fourth channel cavity, and ejects the preformed die material after the cold heading processing of the second station is completed.
According to the processing device, the preformed head of the hexagonal flange face bolt is of an inverted cone structure; the top circular arc of the inverted cone-shaped structure is formed in the first-order punch cavity, and the lower conical part of the inverted cone-shaped structure is formed in the first-order lower-mould cavity.
According to the processing device, the front end of the hexagonal push rod is provided with a cavity, and the cavity is formed into a weight-reducing cavity of the head of the hexagonal flange face bolt.
In order to realize the aim of the other utility model, the utility model also provides a hexagon flange bolt processed by the processing device;
according to the hexagonal flange face bolt, the weight reduction recess is arranged at the head of the hexagonal flange face bolt.
According to the utility model, a machining device for the hexagonal flange face bolt is arranged to comprise a first station cold-heading die, wherein the first station cold-heading die comprises a first station upper die and a first station lower die; the second station cold heading die comprises a second station upper die and a second station lower die; the first working procedure of the first station cold heading die is that the head of the hexagonal flange face bolt is preformed, the rod of the hexagonal flange face bolt is extruded and deformed to form a thread blank diameter, the head of the preformed hexagonal flange face bolt is of an inverted cone structure, the top arc of the preformed part of the hexagonal flange face bolt is formed in the upper die cavity, and the inverted cone part below is formed in the lower die cavity. The pre-forming structure is beneficial to material flowing in the upsetting process and is helpful for the next working procedure to carry out pressure deformation. The second working procedure of the second station cold heading die is to upset the flange face of the formed hexagonal head and the tail end chamfer of the bolt rod part, and the preformed structure of the first working procedure is extruded and upset into the size requirement of the bolt with the hexagonal flange face through the extrusion of the upper die and the lower die in the second working procedure. In addition, the head of the hexagon flange bolt has a weight-reducing recess. Therefore, the utility model realizes the lean production of the cold forming process of the hexagon flange bolt.
Drawings
FIG. 1A is a schematic diagram of a prior art blank for machining a hex flange face bolt;
FIG. 1B is a schematic view of a hexagonal flange-faced bolt machined in a first process according to the prior art;
FIG. 1C is a schematic view of a second process for manufacturing a hex flange face bolt of the prior art;
FIG. 1D is a schematic structural view of a hexagonal flange face bolt machined in a third process of the prior art;
FIG. 1E is a top view of a third prior art process for machining hex flange face bolts;
FIG. 1F is a schematic structural view of a hexagonal flange face bolt machined in a third process of the prior art;
FIG. 1G is a top view of a third prior art process for machining hex flange face bolts;
FIG. 2A is a schematic structural diagram of a blank for machining a hexagon flange bolt in an embodiment of the present invention;
FIG. 2B is a schematic structural diagram of a hexagon flange bolt machined in the first process in the embodiment of the utility model;
FIG. 2C is a schematic structural diagram of a hexagon flange bolt machined in the second process in the embodiment of the utility model;
FIG. 2D is a top view of a hex flange face bolt machined in a second process in accordance with an embodiment of the present invention;
FIG. 3A is a schematic structural view of a first station cold heading die in an embodiment of the utility model;
FIG. 3B is a schematic diagram of a first sequence of punches in an embodiment of the present invention;
FIG. 3C is an enlarged view at A in FIG. 3B;
FIG. 3D is a schematic diagram of a lower die of an embodiment of the present invention;
FIG. 3E is a schematic view of the structure of the first lower die pad in an embodiment of the present invention;
FIG. 4A is a schematic structural diagram of a second station cold heading die in an embodiment of the utility model;
FIG. 4B is a schematic diagram of a second sequence punch in an embodiment of the utility model;
FIG. 4C is an enlarged view at B in FIG. 4B;
FIG. 4D is a partial view of the superhard portion at B in FIG. 4B;
FIG. 4E is a schematic structural diagram of a second-order lower die in an embodiment of the present invention;
FIG. 4F is a schematic diagram of a second lower die pad configuration in an embodiment of the present invention;
fig. 5 is a flowchart of a method for machining hexagonal flange face bolts by the machining device in the embodiment of the utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 2A to 4F, in an embodiment of the present invention, there is provided a machining apparatus for a hexagon flange bolt, including a cold heading machine, the machining apparatus further including:
the first station cold heading die 10 is arranged on the cold heading machine and used for executing first station cold heading machining, and the first station cold heading die 10 comprises a first station upper die 11 and a first station lower die 12; the first station upper die 11 is provided with a first punch cavity 1131 for extruding one end of the prefabricated blank 30 into a preformed head 311 of the hexagonal flange bolt 33; the first station lower die 12 has a first-stage lower die cavity 1231 for extruding the other end of the cut material into a threaded billet diameter 312 of the hexagonal flange face bolt 33; after the first station cold heading processing is finished, a preformed die material 31 of the hexagonal flange face bolt 33 is manufactured;
the second station cold heading die 20 is arranged on the cold heading machine and used for executing second station cold heading processing, and the second station cold heading die 20 comprises a second station upper die 21 and a second station lower die 22; the second-station upper die 21 is provided with a second-order punch cavity 2112 for extruding, expanding and forming the preformed head 311 of the hexagonal flange bolt 33 into the hexagonal flange head 331 of the hexagonal flange bolt 33; the second station lower die 22 has a second-order lower die cavity 2231 for extruding the threaded billet diameter 312 to chamfer the trailing end of the shank 332 of the hex flange face bolt 33; after the first station cold heading process is completed, the hexagonal flange face bolt 33 is manufactured. In the drawings of the various embodiments of the present application, the cold header is not shown.
In this embodiment, a machining device for the hexagonal flange face bolt 33 is provided, which comprises a cold header, a first station cold heading die 10 and a second station cold heading die 20. The first station cold heading die 10 performs first station cold heading processing and comprises a first station upper die 11 and a first station lower die 12; the first-stage punch cavity 1131 of the first-station upper die 11 is used for extruding one end of the prefabricated blank 30 into the preformed head 311 of the hexagonal flange bolt 33; and the sequential lower die cavity 1231 of the first station lower die 12 is used to extrude the other end of the blank into the threaded billet diameter 312 of the hex flange face bolt 33. Preferably, the preformed head 311 of the hexagon flange bolt 33 is of an inverted cone structure; wherein the top arc of the inverted cone structure is formed in the first-order punch cavity 1131, and the lower tapered portion of the inverted cone structure is formed in the first-order lower mold cavity 1231; the preformed structure is beneficial to material flowing in the upsetting process and is helpful to the next working procedure for pressure deformation.
The second station cold heading die 20 performs second station cold heading processing, and the second station cold heading die 20 comprises a second station upper die 21 and a second station lower die 22; the second-order punch cavity 2112 of the second-station upper die 21 is used for extruding, expanding and molding the pre-molded head 311 of the hexagonal flange bolt 33 into the hexagonal flange head 331 of the hexagonal flange bolt 33; the second-stage lower mold cavity 2231 of the second-station lower mold 22 is used for extruding the threaded billet diameter 312 into a chamfer at the tail end of the rod 332 of the hexagon flange bolt 33; after the second station cold heading process is completed, the hexagonal flange face bolt 33 is manufactured.
Referring to fig. 2A to 4F, in an embodiment of the present invention, the first station upper mold 11 includes:
the first spring 111 is fixed on the cold heading machine;
a first spring 112, which is sleeved on the first spring 111; specifically, the first spring 112 is sleeved in the middle of the base of the first spring 112, and after the first spring 112 is compressed by the first-order punch 113, the first-order punch 113 is pushed forward.
A first-order punch 113 disposed at a front end of the first spring 111, wherein one end of the first-order punch 113 has a first upper die ejector rod cavity 1132, and the other end has the first-order punch cavity 1131; the first-order punch cavity 1131 extrudes one end of the prefabricated blank 30 into the preformed head 311 of the hexagonal flange bolt 33;
a first upper ejector pin 114 disposed at a front end of the first spring 111 and inserted into the first upper ejector pin cavity 1132; the first upper die ejector pin 114 can push the prefabricated cut material 30 in the first-order punch cavity 1131; the preformed blank 30 is typically cut to size to the size required for the hex flange face bolt 33.
A first-stage punch sleeve 115 fixed on the cold heading machine and sleeved outside the first spring 111 and the first-stage punch 113; the first-order punch 113 slides relative to the first-order punch holder 115; a punch sleeve 115 is optionally secured to the cold header by locking screws.
The first station lower die 12 includes:
a first lower die ejector rod seat 121, which is arranged at the rear end of the first station lower die 12 and fixed on the cold header;
a first lower die cushion block 122 disposed at a front end of the first lower die ejector rod seat 121, and a first passage cavity 1221 is opened on the first lower die cushion block 122;
the first-order lower die 123 is arranged at the front end of the first station lower die 12, the front end of the first-order lower die is provided with the first-order lower die cavity 1231, and the rear end of the first-order lower die is provided with the second channel cavity 1232;
and the first lower die ejector pin 124 extends out of the first lower die ejector pin seat 121, sequentially passes through the first channel cavity 1221 and the second channel cavity 1232, and ejects the preformed die material 31 after the first station cold heading process is completed.
In this embodiment, the first station cold heading process is the first process, which is the key forming process of the present invention. The head and the shaft 332 of the hexagonal flange-faced bolt 33 are preformed by this first process. The first-order punch sleeve 115 is fixed to the cold header through a locking screw, and the first-order lower die 123 is fixed to the cold header through a locking screw. The serial number 111-115 moulds form an integral first station upper mould 11 structure, a first station punch sleeve 115 and a first station punch 113 can slide mutually, the upper mould part does reciprocating motion, and metal materials (namely the prefabricated blank 30) are extruded and deformed between the first station upper mould 11 and the first station lower mould 12. Firstly, a cut metal material is conveyed between an upper die and a lower die through a mechanical clamp of a cold header, then the upper die 11 at the first station of 111-115 starts to move towards the direction close to the lower die 12 at the first station, the metal material is extruded and expanded and deformed in the first-stage punch die cavity 1131, and is extruded and contracted into the thread blank diameter 312 in the first-stage lower die cavity 1231. After the first station upper die 11 and the first station lower die 12 are attached to each other, the first-order bolt predeformation is completed, then the first station upper die 11 starts to move in the direction away from the first station lower die 12, the first lower die ejector rod 124 ejects the preformed die material 31 from the first-order lower die cavity 1231 of the first-order lower die 123, and the cold header mechanical clamp clamps the preformed die material 31 to prepare for being conveyed to the second station cold header die 20 for processing and deformation.
Referring to fig. 2A to 4F, in an embodiment of the present invention, the second station upper mold 21 includes:
a second punch 211 fixed to the cold header; the rear end of the die is provided with a cushion block die cavity 2111, and the front end of the die is provided with the second-order punch die cavity 2112;
a second spring 212 sleeved on the rear end of the second-order punch 211; specifically, the second spring 212 is sleeved at the rear end of the second-order punch 211, and after the second spring 212 is compressed by the second-order punch 211, the second spring acts to push the second-order punch 211 forward.
A second upper die pad 213 disposed in the pad cavity 2111 and sliding with respect to the pad cavity 2111;
a hexagonal push rod 214214 disposed in the block cavity 2111 and located at the front end of the second upper die block 213; in addition, the front end of the hexagonal pushrod 214 preferably has a cavity 2141, and the cavity 2141 forms a weight-reduction cavity of the head of the hexagonal flange bolt 33. The weight-reducing pocket can reduce the weight of the weight-reducing pocket and save processing materials.
The second station lower mold 22 includes:
a second lower die ejector rod seat 221, which is arranged at the rear end of the second station lower die 22 and fixed on the cold header;
a second lower die cushion block 222, which is arranged at the front end of the second lower die ejector rod seat 221, and a third channel cavity 2221 is formed on the second lower die cushion block 222;
the second-order lower die 223 is arranged at the front end of the second station lower die 22, the front end of the second-order lower die is provided with the second-order lower die cavity 2231, and the rear end of the second-order lower die is provided with the fourth channel cavity 2232;
and a second lower die ejector rod 224 extending from the second lower die ejector rod seat 221, sequentially penetrating through the third channel cavity 2221 and the fourth channel cavity 2232, and ejecting the preformed die material 31 after the second station cold heading process is completed.
In this embodiment, the second station cold heading process is the second process, which is the forming finishing process of the present invention. The second punch 211 is fixed on the cold header through a limit pin, and the second lower die 223 is fixed on the cold header through a locking screw. The serial number 211-214 moulds form an integral second station upper mould 21 structure, the second station upper mould 21 part does reciprocating motion, and the first-sequence pre-forming mould material 31 is extruded and deformed between the second station upper mould 21 and the second station lower mould 22. Firstly, a preformed die material 31 is conveyed between a second station upper die 21 and a second station lower die 22 through a cold header mechanical clamp, then the second station upper die 21 starts to move towards the direction close to the second station lower die 22 from 211 to 214, the preformed die material 31 is extruded and expanded in a second-order punch cavity 2112 to form a hexagonal flange face head 331, a hexagonal push rod 214 is formed into a bolt head weight-reducing cavity 333, and a tail end chamfer of a bolt rod 332 is extruded in a second-order lower die cavity 2231. After the second station upper die 21 and the second station lower die 22 are attached, the deformation of the second-order bolts is completed, and the size requirement of the hexagon flange face bolt 33 is met.
In one embodiment of the present invention, preferably, the preformed head 311 of the hexagon flange bolt 33 has an inverted cone structure; the top circular arc of the inverted cone-shaped structure is formed in the first-order punch cavity 1131, and the lower conical part of the inverted cone-shaped structure is formed in the first-order lower mold cavity 1231.
Referring to fig. 2A to 4F and fig. 5, in an embodiment of the present invention, there is further provided a method for machining the hexagon flange bolt 33 by using the machining apparatus according to any one of the above embodiments, including:
step S501, conveying the prefabricated blank 30 between a first station upper die 11 and a first station lower die 12 of a first station cold heading die 10; the first station upper die 11 moves towards the first station lower die 12, and the prefabricated blank 30 is extruded into a first-order punch cavity 1131 of the first station upper die 11 and a first-order lower die cavity 1231 of the first station lower die 12; after the first station upper die 11 and the first station lower die 12 are attached and then the dies are opened, the preformed die material 31 of the hexagonal flange face bolt 33 is manufactured; the step is a coarse upsetting step;
step S502, conveying the preformed die material 31 between the second station upper die 21 and the second station lower die 22 of the second station cold heading die 20; the second station upper die 21 moves towards the second station lower die 22, and the pre-forming die material 31 is extruded into the second-order punch cavity 2112 of the second station upper die 21 and the second-order lower die cavity 2231 of the second station lower die 22; after the second station upper die 21 and the second station lower die 22 are attached and then the dies are opened, the hexagonal flange face bolt 33 is manufactured; the step is a fine upsetting step.
In this embodiment, the corresponding volume of the cut material is cut according to the size of the hexagonal flange face bolt 33; the cutting material is made of metal material, such as copper or aluminum. The first station cold heading die 10 is used for performing first station cold heading, the first process of the processing method is to perform the head preforming of the hexagon flange face bolt 33, the rod part 332 of the angle flange face bolt is extruded and deformed into the thread blank diameter 312, the preformed head 311 of the hexagon flange face bolt 33 adopts an inverted cone structure, the top arc of the preformed part of the head of the hexagon flange face bolt 33 is formed in an upper die cavity, and the lower tapered part is formed in a lower die cavity. The pre-forming structure is beneficial to material flowing in the upsetting process and is helpful for the next working procedure to carry out pressure deformation. The second station cold heading die 20 is used for executing second station cold heading processing, the second process of the processing method is to upset the hexagon head flange face of the hexagon flange face bolt 33 and chamfer the tail end of the bolt rod part 332 of the hexagon flange face bolt 33, the second process extrudes and headers the preformed structure of the first process into the size requirement of the hexagon flange face bolt 33 through the composite extrusion of the second station upper die 21 and the second station lower die 22, and finally the hexagon flange face bolt 33 is manufactured.
In one embodiment of the present invention, the first station upper mold 11 moves towards the first station lower mold 12, and the prefabricated blank 30 is extruded into the first sequence punch cavity 1131 of the first station upper mold 11 and the first sequence lower mold cavity 1231 of the first station lower mold 12; after mould 11 and the laminating of first station lower mould 12 are opened the mould again in the first station, make hexagon flange face bolt 33's preforming mould material 31 includes:
the first station upper die 11 moves towards the first station lower die 12;
when the first-station upper die 11 is attached to the first-station lower die 12, the prefabricated blank 30 is extruded into the first-stage punch cavity 1131 of the first-stage punch 113 and the first-stage lower die cavity 1231 of the first-stage lower die 123, and the preformed head 311 of the hexagonal flange face bolt 33 and the threaded blank diameter 312 of the hexagonal flange face bolt 33 are respectively extruded;
when the first station upper die 11 and the first station lower die 12 are opened, the first station upper die 11 is far away from the first station lower die 12; the first lower die ejector rod 124 ejects the pre-formed mold material 31 of the hexagonal flange face bolt 33.
In this embodiment, the first station lower mold 12 is fixed, and the first station upper mold 11 moves towards the first station lower mold 12; when the first station upper die 11 is attached to the first station lower die 12, the preformed blank 30 is extruded into the first-order punch cavity 1131 of the first-order punch 113 and the first-order lower die cavity 1231 of the first-order lower die 123, and the preformed head 311 of the hexagon flange bolt 33 and the threaded blank diameter 312 of the hexagon flange bolt 33 are respectively extruded and deformed, so that the preformed die material 31 of the hexagon flange bolt 33 is manufactured. This preforming mould material 31 is because preforming head 311 is the back taper type structure, is favorable to the material of next process to flow, has avoided prior art four-process processing in-process from this, through two, three-process head cold-heading preforming, and metal material cold work hardening phenomenon is serious, and metal material's intensity can increase along with the increase of deflection, and relative metal material mobility worsens, produces the problem of harmful effects to fourth process press die life-span.
In one embodiment of the present invention, the second station upper mold 21 moves towards the second station lower mold 22, and the pre-forming mold material 31 is extruded into the second-order punch cavity 2112 of the second station upper mold 21 and the second-order lower mold cavity 2231 of the second station lower mold 22; after mould 21 and second station lower mould 22 laminating die sinking again on the second station, make hexagon flange face bolt 33 includes:
the second station upper die 21 moves towards the second station lower die 22;
when the second-station upper die 21 is attached to the second-station lower die 22, the pre-formed die material 31 of the hexagonal flange face bolt 33 is extruded into the second-order punch cavity 2112 of the second-order punch 211 and the second-order lower die cavity 2231 of the second-order lower die 223, and the hexagonal flange face head 331 of the hexagonal flange face bolt 33 and the tail end chamfer of the rod 332 of the hexagonal flange face bolt 33 are respectively extruded and formed;
when the second station upper die 21 and the second station lower die 22 are opened, the second station upper die 21 is far away from the second station lower die 22; the second lower die ejector rod 224 ejects the hexagonal flange face bolt 33.
In one embodiment of the present invention, the second station lower mold 22 is fixed, and the second station upper mold 21 moves towards the second station lower mold 22; when the second-station upper die 21 is attached to the second-station lower die 22, the pre-formed die material 31 is respectively extruded into the second-order punch cavity 2112 of the second-order punch 211 and the second-order lower die cavity 2231 of the second-order lower die 223, that is, the pre-formed head 311 of the hexagon flange bolt 33 extrudes the hexagon flange head 331 of the hexagon flange bolt 33; the thread blank diameter 312 of the hexagonal flange face bolt 33 is used for extruding and forming a tail end chamfer of the rod part 332 of the hexagonal flange face bolt 33; and finally, after the second station upper die 21 and the second station lower die 22 are opened, ejecting the hexagonal flange face bolt 33 by a second lower die ejector rod 224 to complete the processing of the hexagonal flange face bolt 33. Preferably, the front end of the hexagonal pushrod 214 has a cavity 2141, and the cavity 2141 forms a weight-reduction cavity of the head of the hexagon flange bolt 33. The heads of the hexagon head bolts 33 thus machined have weight-reducing recesses.
In addition, in an embodiment of the present invention, there is further provided a hexagon flange bolt 33 processed by the processing device according to any one of the above embodiments, and the head of the hexagon flange bolt 33 has a weight-reduction recess 333.
Therefore, the processing device and the processing method according to the embodiments of the present invention adopt the hexagonal flange bolt 33 produced by the lean cold heading forming process, and the processing steps only need two steps, which are two less than those of the existing processing method, thereby avoiding the problems that the cold hardening phenomenon of the metal material is serious, the strength of the metal material increases with the increase of the deformation amount, the relative material flowability becomes poor, and the service life of the stamping die in the fourth step is adversely affected by the cold heading preforming of the head in the four steps in the prior art, and the processing efficiency is improved. In addition, due to the structural design of the head of the hexagon flange bolt 33 with the weight reduction recess, the weight of the hexagon flange bolt 33 is reduced by 5% compared with the weight of the hexagon flange bolt 33 manufactured by the existing molding process, and the material is saved. In addition, the deformation process of the first and second station cold heading dies is reduced from four to two, so that the cost of the cold heading die is reduced by 50%, the die cost is saved, and the lean production of the cold forming process of the hexagon flange face bolt 33 is realized.
According to the utility model, a machining device for the hexagonal flange face bolt is arranged to comprise a first station cold-heading die, wherein the first station cold-heading die comprises a first station upper die and a first station lower die; the second station cold heading die comprises a second station upper die and a second station lower die; the first working procedure of the first station cold heading die is that the head of the hexagonal flange face bolt is preformed, the rod of the hexagonal flange face bolt is extruded and deformed to form a thread blank diameter, the head of the preformed hexagonal flange face bolt is of an inverted cone structure, the top arc of the preformed part of the hexagonal flange face bolt is formed in the upper die cavity, and the inverted cone part below is formed in the lower die cavity. The pre-forming structure is beneficial to material flowing in the upsetting process and is helpful for the next working procedure to carry out pressure deformation. The second working procedure of the second station cold heading die is to upset the flange face of the formed hexagonal head and the tail end chamfer of the bolt rod part, and the preformed structure of the first working procedure is extruded and upset into the size requirement of the bolt with the hexagonal flange face through the extrusion of the upper die and the lower die in the second working procedure. In addition, the head of the hexagon flange bolt has a weight-reducing recess. Therefore, the utility model realizes the lean production of the cold forming process of the hexagon flange bolt.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (9)
1. The utility model provides a processingequipment of hexagonal flange face bolt, includes the cold heading machine, its characterized in that, processingequipment still includes:
the first station cold heading die is arranged on the cold heading machine and used for executing first station cold heading machining, and comprises a first station upper die and a first station lower die; the first station upper die is provided with a first-order punch die cavity which extrudes one end of a prefabricated blank into a preformed head of the hexagonal flange face bolt; the first station lower die is provided with a first-order lower die cavity for extruding the other end of the cut material into the diameter of a threaded blank of the hexagonal flange face bolt; after the cold heading processing of the first station is finished, a preformed die material of the hexagonal flange face bolt is manufactured;
the second station cold heading die is arranged on the cold heading machine and used for executing second station cold heading machining, and comprises a second station upper die and a second station lower die; the second station upper die is provided with a second-order punch die cavity for extruding and expanding the preformed head of the hexagonal flange face bolt to form the hexagonal flange face head of the hexagonal flange face bolt; the second station lower die is provided with a second-order lower die cavity which is used for radially extruding the threaded blank into a chamfer angle at the tail end of the rod part of the hexagonal flange face bolt; and after the cold heading processing of the second station is finished, manufacturing the hexagonal flange face bolt.
2. The processing apparatus as claimed in claim 1, wherein the first station upper die comprises:
the first spring seat is fixed on the cold heading machine;
the first spring is sleeved on the first spring seat;
the first-order punch is arranged at the front end of the first spring seat, one end of the first-order punch is provided with a first upper die ejector rod cavity, and the other end of the first-order punch is provided with the first-order punch cavity;
the first upper die ejector rod is arranged at the front end of the first spring seat and inserted into the first upper die ejector rod cavity;
the first-order punch sleeve is fixed on the cold heading machine and sleeved outside the first spring seat and the first-order punch; the progressive punch slides relative to the progressive punch sleeve.
3. The tooling apparatus of claim 2 wherein said first station lower die comprises:
the first lower die ejector rod seat is arranged at the rear end of the first station lower die and is fixed on the cold header;
the first lower die cushion block is arranged at the front end of the first lower die ejector rod seat, and a first channel cavity is formed in the first lower die cushion block;
the first-order lower die is arranged at the front end of the first station lower die, the front end of the first-order lower die is provided with the first-order lower die cavity, and the rear end of the first-order lower die is provided with the second channel cavity;
and the first lower die ejector rod extends out of the first lower die ejector rod seat, sequentially penetrates through the first channel cavity and the second channel cavity, and ejects the preformed die material after the first station cold heading processing is finished.
4. The processing apparatus as claimed in claim 1, wherein the second station upper mold comprises:
the second-order punch is fixed on the cold header; the rear end of the second-order punch head is provided with a cushion block die cavity, and the front end of the second-order punch head is provided with the second-order punch head die cavity;
the second spring is sleeved on the rear end of the second-order punch;
the second upper die cushion block is arranged in the cushion block die cavity and slides relative to the cushion block die cavity;
and the hexagonal push rod is arranged in the cushion block die cavity and is positioned at the front end of the second upper die cushion block.
5. The tooling apparatus of claim 4 wherein said second station lower die comprises:
the second lower die ejector rod seat is arranged at the rear end of the second station lower die and is fixed on the cold header;
the second lower die cushion block is arranged at the front end of the second lower die ejector rod seat, and a third channel cavity is formed in the second lower die cushion block;
the second-order lower die is arranged at the front end of the second station lower die, the front end of the second-order lower die is provided with the second-order lower die cavity, and the rear end of the second-order lower die is provided with a fourth channel cavity;
and the second lower die ejector rod extends out of the second lower die ejector rod seat, sequentially penetrates through the third channel cavity and the fourth channel cavity, and ejects the preformed die material after the cold heading processing of the second station is completed.
6. The machining device as claimed in claim 2, wherein the preformed head of the hexagonal flange face bolt is of an inverted cone structure; the top circular arc of the inverted cone-shaped structure is formed in the first-order punch cavity, and the lower conical part of the inverted cone-shaped structure is formed in the first-order lower-mould cavity.
7. The tooling device of claim 4 wherein the forward end of the hexagonal push rod has a pocket cavity that forms a weight-reducing pocket of the hexagonal flange face bolt head.
8. A hexagon flange bolt processed by the processing device of any one of claims 1 to 7.
9. The hex flange bolt of claim 6, wherein the weight reduction pocket of the hex flange bolt head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121980694.1U CN216540702U (en) | 2021-08-20 | 2021-08-20 | Machining device for hexagonal flange face bolt and hexagonal flange face bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121980694.1U CN216540702U (en) | 2021-08-20 | 2021-08-20 | Machining device for hexagonal flange face bolt and hexagonal flange face bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216540702U true CN216540702U (en) | 2022-05-17 |
Family
ID=81563697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121980694.1U Active CN216540702U (en) | 2021-08-20 | 2021-08-20 | Machining device for hexagonal flange face bolt and hexagonal flange face bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216540702U (en) |
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2021
- 2021-08-20 CN CN202121980694.1U patent/CN216540702U/en active Active
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