CN210702296U - Mould structure for forming ultrathin step screw - Google Patents
Mould structure for forming ultrathin step screw Download PDFInfo
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- CN210702296U CN210702296U CN201921398974.4U CN201921398974U CN210702296U CN 210702296 U CN210702296 U CN 210702296U CN 201921398974 U CN201921398974 U CN 201921398974U CN 210702296 U CN210702296 U CN 210702296U
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Abstract
The utility model relates to a mould structure for forming ultra-thin step screw, which is a three-mould three-punching cold heading mould and comprises a first preforming mould for preforming a round platform shape and a screw rod on the head of a part, a second preforming mould for preforming a rudiment of the head of the part and forming a first step part and a second step part, and a third forming mould for forming the head of the part; the front side of the third main die core of the third forming die is provided with a sleeve sheet, the outer ring of the sleeve sheet is also sleeved with a reinforcing ring, and the front end face of the reinforcing ring is higher than the front end face of the sleeve sheet. The utility model discloses a mould structure of ultra-thin step screw of shaping for ultra-thin step screw can go out required size through the cold-heading shaping completely, and the shaping order is reasonable, guarantees the precision of shaping size, establishes the gusset ring at the outer lane cover of lagging during final shaping, effectively protects the lagging, makes the mould life-span improve, both reduces the processing cost, saves retooling time again, improves machining efficiency.
Description
Technical Field
The utility model relates to a screw processing field for car seat especially relates to a mould structure of ultra-thin step screw of shaping.
Background
The ultra-thin step screw as shown in fig. 4 is composed of a head a, a first step B, a second step C and a screw rod D; when the cold heading forming is adopted, when the head part A and the first step part B are formed, the sleeve sheet bundle type of the main die is adopted, the step thickness of the first step part B is only 3.2mm, the die is easy to damage during the cold heading, the service life of the die is short, and the step shape of the first step part B of the manufactured screw is not full, so that the existing mode is generally that after the screw with the allowance is subjected to cold heading, the step surface of the first step part B is machined, but the forming mode is high in cost.
Disclosure of Invention
The utility model provides a mould structure of ultra-thin step screw of shaping for ultra-thin step screw can go out required size through the cold-heading shaping completely, and the shaping order is reasonable, and guarantees the precision of shaping size, establishes the gusset ring at the outer lane cover of lagging during final shaping in the cold-heading module, and effectual protection lagging makes the mould life-span improve, has both reduced the processing cost, has saved retooling time again, improves machining efficiency.
A mould structure for forming ultrathin step screws is a three-mould three-punching cold heading mould and comprises a first preforming mould, a second preforming mould and a third forming mould; the three forming dies comprise a punching die and a main die, and a punching die cushion block, a punching die core and a punching die thimble are arranged in the punching die; the main die is internally provided with a main die inner die, a main die core and a main die thimble; the first stamping die core of the first pre-forming die is movable, a first spring is arranged on one side of the tail end of the first stamping die core, during forming, the front end of the first stamping die core is abutted against the front end of the first main die core under the action of the first spring to form a closed space, the tail section of a part is inserted into the first main die core, the front section of the part is placed in the first stamping die core, the main die abuts against the tail end of the ejector pin part, and the first stamping die drives the stamping ejector pin to perform first forming on the part; a second spring is arranged on the rear side of the die cushion block of the second preforming die, during forming, the die ejector pin is positioned at a front dead point under the action of the second spring, the front section of the part abuts against the die ejector pin, the tail section of the part is inserted into the second main die core, the main die ejector pin abuts against the tail end of the part, and the second die drives the second die core to perform secondary forming on the part; a sleeve sheet is arranged on the front side of a third main die core of the third forming die, a reinforcing ring is sleeved on the outer ring of the sleeve sheet, and the front end surface of the reinforcing ring is higher than the front end surface of the sleeve sheet; during forming, the tail section of the part is inserted into the third main die core, the first step section of the part is inserted into the sleeve piece, the part, close to the head, of the part is placed in the inner space, higher than the sleeve piece, of the reinforcing ring, and the third die integrally drives the third die core and the die top to perform final forming on the part.
The front end of a die ejector pin of the first preforming die is tapered and is used for preforming a tapered groove in the front end of the head of the part.
The front end of a die ejector pin of the second preforming die is arranged to be conical and used for positioning the head of the part.
The front end of a first die core of the first preforming die is in a circular truncated cone shape, and the first main die core is provided with a screw rod forming cavity for preforming a circular truncated cone shape and a screw rod on the head of the part.
The front end of a second die core of the second preforming die is provided with a spherical concave surface, and the second main die core is provided with a die cavity for forming a first step part, a second step part and an accommodating screw rod and is used for forming a prototype of the part preforming head part and forming the first step part and the second step part.
The front end of a third die core of the third forming die is provided with a concave cavity for forming the head of the part, the third main die core is a cavity for accommodating the second step part and the screw rod, and the front end of a die thimble of the third forming die is provided with a bulge part of a front end type groove of the head of the part for forming the head of the part.
The utility model has the advantages that: the utility model discloses a mould structure of ultra-thin step screw of shaping for ultra-thin step screw can go out required size through the cold-heading shaping completely, and the shaping order is reasonable, guarantees the precision of shaping size, establishes the gusset ring at the outer lane cover of lagging during final shaping, and effectual protection lagging makes the mould life-span improve, has both reduced the processing cost, has saved retooling time again, improves machining efficiency.
Drawings
FIG. 1 is a schematic view of a mold structure for molding an ultra-thin stepped screw according to an embodiment;
FIG. 2 is a partially enlarged schematic view of a dotted line portion of FIG. 1;
FIG. 3 is a schematic view of an ultra-thin stepped screw molding sequence of a mold structure for molding an ultra-thin stepped screw according to an embodiment;
FIG. 4 is a schematic diagram of the structure of an ultra-thin stepped screw and its dimensional requirements;
FIG. 5 is a schematic view of a first preform mold;
fig. 6 is a schematic structural view of the second preform mold.
Detailed Description
In order to deepen the understanding of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and embodiments, which are only used for explaining the present invention and are not limited to the protection scope of the present invention.
Examples
As shown in fig. 1, 2, 5 and 6, the present embodiment provides a mold structure for forming an ultra-thin step screw, which is a three-mold three-punch cold heading mold and includes a first preform mold, a second preform mold and a third molding mold; the three forming dies comprise a punching die 1 and a main die 2, and a punching die cushion block 3, a punching die core and a punching die thimble 5 are arranged in the punching die 1; the main die is internally provided with a main die inner die 6, a main die core and a main die thimble 8; the first stamping die core 12 of the first pre-forming die is movable, a first spring 11 is arranged on one side of the tail end of the first stamping die core 12, during forming, the front end of the first stamping die core is abutted against the front end of the first main die core 13 under the action of the first spring 11 to form a closed space, the tail section of a part is inserted into the first main die core 13, the front section of the part is placed in the first stamping die core 12, the main die thimble 8 is abutted against the tail end of the part, and the first stamping die drives the stamping die thimble 5 to form the part for the first time; a second spring 14 is arranged on the rear side of the die cushion block 3 of the second preforming die, during forming, the die ejector pin 5 is positioned at a front dead center under the action of the second spring 14, the front section of the part abuts against the die ejector pin 5, the tail section of the part is inserted into a second main die core 16, the main die ejector pin 8 abuts against the tail end of the part, and the second die drives the second die core 15 to perform secondary forming on the part; a sleeve piece 10 is arranged on the front side of a third main die core 7 of the third forming die, a reinforcing ring 9 is further sleeved on the outer ring of the sleeve piece 10, and the front end face of the reinforcing ring 9 is higher than that of the sleeve piece 10; during forming, the tail section of the part is inserted into the third main die core 7, the first step part B of the part is inserted into the sleeve piece 10, the part, close to the back, of the head part A of the part is placed in the inner space of the reinforcing ring 9, which is higher than the sleeve piece 10, and the third die integrally drives the third die core 4 and the die ejector pin 5 to finally form the part; the front end of a die ejector pin of the first preforming die is conical and is used for preforming a conical groove in the front end of the head of the part; the front end of a die ejector pin of the second preforming die is conical and used for positioning the head of the part; the front end of a first die core 12 of the first preforming die is in a circular truncated cone shape, and the first main die core is provided with a screw rod forming cavity for preforming a circular truncated cone shape and a screw rod D on the head of the part; the front end of a second die core 15 of the second preforming die is provided with a spherical concave surface, and a second main die core is provided with a die cavity for forming a first step part, a second step part and an accommodating screw rod and is used for preforming an embryonic form of the head of the part and forming a first step part B and a second step part C; the front end of a third die core 4 of the third forming die is set to be a concave cavity for forming the head A of the part, the third main die core is a cavity for accommodating the second step part C and the screw D, and the front end of a die thimble of the third forming die is set to be a convex part of a front-end groove of the head of the part for forming the head A of the part.
According to the die structure for forming the ultrathin stepped screw, the raw materials are prepared, and wires are cut off through scissors; performing primary preforming through a first preforming die, loading the rear section of the wire into a first main die core, enabling the tail end of the wire to abut against a main die ejector pin, enabling a first die core to abut against the front end of a rear die under a first spring to form a closed space, and driving the die ejector pin to move forwards by the first punching die during die assembly so as to deform the wire and form a circular truncated cone-shaped head and a screw rod; then, performing second preforming by using a second preforming die, wherein a die ejector pin of the second preforming die is positioned at a front dead point under the action of a second spring, the front end of the part abuts against the die ejector pin, the part is pushed into a cavity of a main die core by the die ejector pin, the tail end of the part abuts against the main die ejector pin, and when die assembly is carried out, the second die drives the second die core to move forwards so that the part is deformed to form a prototype of the head of the part, a first step part and a second step part; then, final forming is carried out through a third forming die, the front end of the part abuts against a stamping die thimble, when the die is closed, the third stamping die moves integrally, the stamping die thimble pushes the part to enter a cavity of a third main die core, and the third stamping die core, the sleeve sheet, the reinforcing ring and the third main die core are formed together to form the head of the part; finally, the procedures of thread rolling, surface treatment and falling resistance are carried out, and the ultrathin step screw is obtained; the shape of the screw in its various stages of processing is shown in figure 3.
The die structure for forming the ultrathin stepped screw is used for completing overmoulding through the clamp transmission mechanism.
The mould structure of ultra-thin step screw of shaping of this embodiment for ultra-thin step screw can go out required size through the cold-heading shaping completely, the shaping order is reasonable, and guarantee shaping size's precision, the back up ring is established to the outer lane cover at the lagging during final shaping in the cold-heading module, effectual protection lagging, back up ring and lagging position relation make the step shape of first step face plump moreover, make the mould life-span improve, the processing cost has both been reduced, the retooling time has been saved again, and the machining efficiency is improved.
In addition, it should be noted that the units of the dimensions in fig. 4 in the drawings of the specification are all millimeters.
The above-mentioned embodiments should not limit the present invention in any way, and all the technical solutions obtained by adopting equivalent replacement or equivalent conversion fall within the protection scope of the present invention.
Claims (6)
1. The utility model provides a mould structure of ultra-thin step screw of shaping which characterized in that: the three-die three-punching cold heading die comprises a first preforming die, a second preforming die and a third preforming die; the three forming dies comprise a punching die and a main die, and a punching die cushion block, a punching die core and a punching die thimble are arranged in the punching die; the main die is internally provided with a main die inner die, a main die core and a main die thimble; the first stamping die core of the first pre-forming die is movable, a first spring is arranged on one side of the tail end of the first stamping die core, during forming, the front end of the first stamping die core is abutted against the front end of the first main die core under the action of the first spring to form a closed space, the tail section of a part is inserted into the first main die core, the front section of the part is placed in the first stamping die core, the main die abuts against the tail end of the ejector pin part, and the first stamping die drives the stamping ejector pin to perform first forming on the part; a second spring is arranged on the rear side of the die cushion block of the second preforming die, during forming, the die ejector pin is positioned at a front dead point under the action of the second spring, the front section of the part abuts against the die ejector pin, the tail section of the part is inserted into the second main die core, the main die ejector pin abuts against the tail end of the part, and the second die drives the second die core to perform secondary forming on the part; a sleeve sheet is arranged on the front side of a third main die core of the third forming die, a reinforcing ring is sleeved on the outer ring of the sleeve sheet, and the front end surface of the reinforcing ring is higher than the front end surface of the sleeve sheet; during forming, the tail section of the part is inserted into the third main die core, the first step section of the part is inserted into the sleeve piece, the part, close to the head, of the part is placed in the inner space, higher than the sleeve piece, of the reinforcing ring, and the third die integrally drives the third die core and the die top to perform final forming on the part.
2. The mold structure for molding the ultra-thin stepped screw according to claim 1, wherein: the front end of a die ejector pin of the first preforming die is tapered and is used for preforming a tapered groove in the front end of the head of the part.
3. The mold structure for molding the ultra-thin stepped screw according to claim 2, wherein: the front end of a die ejector pin of the second preforming die is arranged to be conical and used for positioning the head of the part.
4. The mold structure for molding the ultra-thin stepped screw according to claim 1, wherein: the front end of a first die core of the first preforming die is in a circular truncated cone shape, and the first main die core is provided with a screw rod forming cavity for preforming a circular truncated cone shape and a screw rod on the head of the part.
5. The mold structure for molding the ultra-thin stepped screw according to claim 1, wherein: the front end of a second die core of the second preforming die is provided with a spherical concave surface, and the second main die core is provided with a die cavity for forming a first step part, a second step part and an accommodating screw rod and is used for forming a prototype of the part preforming head part and forming the first step part and the second step part.
6. The mold structure for molding the ultra-thin stepped screw according to claim 1, wherein: the front end of a third die core of the third forming die is provided with a concave cavity for forming the head of the part, the third main die core is a cavity for accommodating the second step part and the screw rod, and the front end of a die thimble of the third forming die is provided with a bulge part of a front end type groove of the head of the part for forming the head of the part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921398974.4U CN210702296U (en) | 2019-08-27 | 2019-08-27 | Mould structure for forming ultrathin step screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921398974.4U CN210702296U (en) | 2019-08-27 | 2019-08-27 | Mould structure for forming ultrathin step screw |
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| Publication Number | Publication Date |
|---|---|
| CN210702296U true CN210702296U (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921398974.4U Active CN210702296U (en) | 2019-08-27 | 2019-08-27 | Mould structure for forming ultrathin step screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210702296U (en) |
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2019
- 2019-08-27 CN CN201921398974.4U patent/CN210702296U/en active Active
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Address after: No.36, Jiasheng Road, Shengpu Town, Suzhou Industrial Park, Suzhou, Jiangsu Province, 215000 Patentee after: Suzhou Xinkai fastening system Co.,Ltd. Address before: No.36, Jiasheng Road, Shengpu Town, Suzhou Industrial Park, Suzhou, Jiangsu Province, 215000 Patentee before: SUZHOU INDUSTRIAL PARK XINKAI PRECISION FASTENER Co.,Ltd. |