CN216757788U - Spinning tool for manufacturing large-groove-depth multi-groove large-V-shaped spinning belt pulley - Google Patents
Spinning tool for manufacturing large-groove-depth multi-groove large-V-shaped spinning belt pulley Download PDFInfo
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- CN216757788U CN216757788U CN202220326368.7U CN202220326368U CN216757788U CN 216757788 U CN216757788 U CN 216757788U CN 202220326368 U CN202220326368 U CN 202220326368U CN 216757788 U CN216757788 U CN 216757788U
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Abstract
A spinning tool for manufacturing a large-groove-depth multi-groove large-V-shaped spinning belt pulley comprises a core mold clamp, a forming wheel and a performing wheel. The height Ht of a forming tooth of the pre-forming wheel is 9-13 mm larger than the width Hg of a notch of a product, and the length Lt of the forming tooth is 1-3 mm smaller than the depth Dg of the groove of the product; dg greater than 25 mm. The cross section shape of the working surface of the forming tooth consists of an upper bevel edge, a lower bevel edge and five sections of circular arcs connecting the upper bevel edge and the lower bevel edge; the circles of the two adjacent circular arcs are tangent. The five sections of circular arcs comprise two sections of circular arcs I R1, two sections of circular arcs II R2 and circular arcs III R3; the first circular arc R1 is tangent with the upper bevel edge or the lower bevel edge connected with the first circular arc R1; the radius of the circle where the first circular arc R1 is located is smaller than that of the circle where the second circular arc R2 is located; the radius of the circle where the second circular arc R2 is located is smaller than that of the circle where the third circular arc R3 is located. The included angle theta between the upper bevel edge and the lower bevel edge is 1-5 degrees larger than the included angle alpha between the upper edge and the lower edge of the product groove type. The utility model solves the problem that the large V-shaped spinning belt pulley with the groove depth of more than 25mm is easy to break in the use process, effectively improves the strength of the belt pulley and ensures the safety of the belt pulley in use.
Description
Technical Field
The utility model belongs to the technical field of plate spinning belt pulley processing, and particularly relates to a spinning tool for manufacturing a large-groove-depth multi-groove large V-shaped spinning belt pulley.
Background
At present, the spinning belt pulley with the large V-shaped structure is widely applied to automobiles, agricultural machinery and engineering machinery, and relatively speaking, the structure has the advantages of less material consumption, less working procedures and simple mold. The groove depth of the large V-shaped spinning belt pulley which is widely used at present is generally lower than 20mm, along with the technical development, the market puts higher requirements on products, the groove depth of the large V-shaped spinning belt pulley which is required at present reaches more than 25mm, the existing forming equipment and the process can be used for forming the products with the groove depth reaching 25mm, the products cannot be broken in the forming process, but the formed products are broken frequently in the using process, and the use safety is poor.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provide the spinning tool for manufacturing the large-groove-depth multi-groove large V-shaped spinning belt pulley, so that the strength of the large V-shaped spinning belt pulley is effectively improved, and the safety of the large V-shaped spinning belt pulley in the using process is ensured.
The technical scheme of the utility model is as follows: a spinning tool for manufacturing a large-groove-depth multi-groove large V-shaped spinning belt pulley comprises a core mold clamp for pressing a product blank, wherein the core mold clamp comprises an upper core mold in transmission connection with an upper connecting disc of spinning equipment and a lower core mold in transmission connection with a lower connecting disc of the spinning equipment; the lower core die is internally provided with a die core; the upper end of the mold core is provided with an ejector matched with the shape of the product; an inner core mold is arranged between the lower core mold and the mold core; the inner core mold consists of a plurality of split molds; the rotary wheel is arranged on the rotary wheel fixing seat; the rotary wheel is arranged corresponding to the product blank clamped by the core mold clamp; the spinning wheel comprises a forming wheel.
The spinning wheel further comprises a pre-forming wheel.
The pre-forming wheel is provided with N forming teeth; and N is the number of grooves required to be formed in the product. .
The height Ht of the forming teeth is 9-13 mm larger than the width Hg of the product notch.
The length Lt of the forming teeth is 1-3 mm smaller than the depth Dg of the product groove; the product groove depth Dg is greater than 25 mm.
The cross sections of the working surfaces of the forming teeth are the same.
The cross section of the working surface of the forming tooth is formed by an upper bevel edge, a lower bevel edge and five sections of circular arcs connecting the upper bevel edge and the lower bevel edge; the circles of the two adjacent circular arcs are tangent.
The five sections of circular arcs comprise two sections of circular arcs I R1 respectively connected with the upper bevel edge and the lower bevel edge, two sections of circular arcs II R2 respectively connected with the two sections of circular arcs I R1, and circular arcs III R3 with two ends respectively connected with the two sections of circular arcs II R2; the first arc R1 is tangent with the upper bevel edge or the lower bevel edge connected with the first arc R1; the radius of the circle where the first circular arc R1 is located is smaller than that of the circle where the second circular arc R2 is located; the radius of the circle where the second circular arc R2 is located is smaller than that of the circle where the third circular arc R3 is located.
The included angle theta between the upper bevel edge and the lower bevel edge is 1-5 degrees larger than the included angle alpha between the upper edge and the lower edge of the product groove type.
The radius of the first circular arc R1 is 8-12 mm; the radius of the second circular arc R2 is 14-18 mm; the radius of the circular arc three R3 is 20-24 mm.
The radius of the first circular arc R1 is 9-11 mm; the radius of the second circular arc R2 is 15-17 mm; the radius of the circular arc three R3 is 21-23 mm.
And the included angle theta between the upper bevel edge and the lower bevel edge is 1-3 degrees larger than the included angle alpha between the upper edge and the lower edge of the product groove type.
And the N is 2.
The utility model has the conception that the material of the large V-shaped spinning belt pulley has bending deformation and plastic deformation in the spinning forming process, the groove bottom part of the large V-shaped spinning belt pulley is the most stressed part in the forming process, the plastic deformation is also the most stressed part, and the thickness of the groove bottom is necessarily smaller than that of the plate material. The inventor researches and discovers that the groove depth of the large V-shaped spinning belt pulley which is widely used at present is generally lower than 20mm, the groove depth is small in plastic deformation amount in the spinning forming process, and the plastic deformation amount of the large V-shaped spinning belt pulley with the groove depth of 25mm is far larger than that of the large V-shaped spinning belt pulley with the groove depth of lower than 20 mm. The thickness of the bottom of the large-groove-depth multi-groove large V-shaped spinning belt pulley manufactured by the prior art is only 50% of the thickness of a plate, and the insufficient thickness of the bottom part of the large-groove-depth multi-groove large V-shaped spinning belt pulley is the root cause of the fracture of the large-groove-depth multi-groove large V-shaped spinning belt pulley. From fatigue durability verification and long-term use condition analysis, the thickness of the groove bottom at least needs to reach 70% of the thickness of the original plate after plastic deformation, and the groove bottom can not be broken in the use process.
The utility model has the technical effects that: the utility model solves the problem that the large V-shaped spinning belt pulley with the groove depth of more than 25mm is easy to break in the use process, and the newly designed preforming wheel ensures that the thickness of the bottom part of the product after spinning is more than 70% of the thickness of a plate, improves the strength of the large V-shaped spinning belt pulley with multiple grooves with the large groove depth and ensures the safety of the large V-shaped spinning belt pulley in the use process.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of the structure of the preform wheel.
FIG. 3 is a schematic structural view of a large V-pattern spun pulley product.
In the figure, 1, a lower connecting disc, 2, a lower core mould, 3, a forming block, 4, an inner core mould, 5, a mould core, 6, an ejector, 7, an upper core mould, 8, an upper connecting disc, 9, a preforming wheel, 10, a forming wheel, 11, a rotary wheel fixing seat, 12 and a product.
Detailed Description
In fig. 1, a lower coupling disc 1 of the spinning device is connected with a lower core mold 2 through a screw, and the lower core mold are in tight fit through a spigot. The lower core mould 2 is internally provided with a forming block 3 which adopts sliding fit. The forming block 3 is internally provided with a mold core 5, and a spigot is adopted for sliding fit between the mold core and the mold core. An inner core mold 4 is arranged between the forming block 3 and the core mold 5, and the inner core mold 4, the forming block 3 and the core mold 5 are matched in a sliding mode. The lower core mold 2 and the mold core 5 are in tight fit; the supporting precision and rigidity of the inner core mould 4 are increased while the inner core mould 4 is prevented from being scattered when being placed. An ejector 6 is arranged in the mold core 5, and a spigot is adopted for sliding fit between the mold core and the ejector. The lower core die 2, the forming block 3, the inner core die 4, the die core 5 and the ejector 6 can be driven to rotate by the driving of the lower connecting disc 1 of the spinning device. The upper connecting disc 8 of the spinning device is connected with the upper core mould 7 through a screw, and the upper connecting disc and the upper core mould are in tight fit through a spigot. The upper coupling plate 8 can drive the upper core mould 7 to realize the up-and-down reciprocating motion and can synchronously rotate with the lower coupling plate 1. The preforming wheel 9 is fixed on a spinning device spinning wheel fixing seat 11 and can reciprocate left and right under the driving of the spinning device, a bearing is arranged between the preforming wheel 9 and the spinning wheel fixing seat 11, and the preforming wheel 9 can rotate in the opposite direction to the product 12 in the process of extruding the product 12. The forming wheel 10 is fixed on a spinning device spinning wheel fixing seat 11 and can reciprocate left and right under the driving of the spinning device, a bearing is arranged between the forming wheel 10 and the spinning wheel fixing seat 11, and the forming wheel 10 can rotate reversely with a product 12 in the process of extruding the product 12.
The preforming wheel 9 has 2 forming teeth. The cross sections of the working surfaces of the forming teeth are the same. The cross-sectional shape of the working face of the forming tooth is formed by an upper inclined edge 901, a lower inclined edge 902, and five arcs connecting the upper inclined edge 901 and the lower inclined edge 902. The circles of the two adjacent circular arcs are tangent. The arc starts to gradually increase from the upper bevel edge part on one side to the central part and then gradually decreases to the lower bevel edge part on the other side, and the two sides are of symmetrical structures. The five sections of circular arcs comprise two sections of circular arcs I R1 respectively connected with the upper bevel edge and the lower bevel edge, two sections of circular arcs II R2 respectively connected with the two sections of circular arcs I R1, and circular arcs III R3 with two ends respectively connected with the two sections of circular arcs II R2. Arc one, R1, is tangent to the upper or lower beveled edge to which it is attached. The radius of the circle where the first arc is located is smaller than that of the circle where the second arc is located. The radius of the circle where the second arc is located is smaller than that of the circle where the third arc is located.
In operation, a blank of the product 12 is first placed into the channel between the lower core mold 2 and the forming block 3. The upper core mould 7 is driven by the upper connecting disc 8 to move downwards, and after the upper core mould 7 is attached to the product 12, the upper connecting disc 8 and the lower connecting disc 1 are started to synchronously rotate and drive the product 12 to rotate. The preforming wheel 9 is driven by the rotary wheel fixing seat 11 to move until the preforming wheel 9 is close to the product 12 until the preforming wheel is contacted with the product 12, the preforming wheel 9 rotates reversely relative to the product 12 and continuously feeds and extrudes the product 12, meanwhile, the upper core die 7 moves downwards to press the product 12, an inner cavity of the product 12 is supported by the inner core die 4, the product 12 is bent and folded, and when the height of a straight edge of the product is two thirds of the height of a blank, the preforming wheel 9 is withdrawn. The forming wheel 10 is driven by the spinning wheel fixing seat 11 to move to approach until contacting the product 12, the forming wheel 10 rotates reversely relative to the product 12 and continuously feeds and extrudes the product 12, meanwhile, the upper core mold 7 continuously presses the product 12 downwards, the inner cavity of the product 12 is supported by the inner core mold 4, and the product 12 is continuously bent and folded until the product 12 is completely attached to the forming block 3, the upper core mold 7, the forming wheel 10 and the inner core mold 4. After the spinning process is completed, the upper core mold 7 and the forming wheel 10 are retracted, the product 12 can be taken out of the forming block 3, and then the core mold 5, the inner core mold 4 and the ejector 6 in the inner cavity of the product 12 are taken out.
In fig. 2 and 3, the utility model provides a preforming wheel 9 with 2 forming teeth. The forming tooth height Ht is 11.5mm greater than the product slot width Hg. The length Lt of the forming teeth is 1.2mm less than the depth Dg of the product groove. The cross sections of the working surfaces of the forming teeth are the same. The cross-sectional shape of the working face of the forming tooth is formed by an upper inclined edge 901, a lower inclined edge 902, and five arcs connecting the upper inclined edge 901 and the lower inclined edge 902. The circles of the two adjacent circular arcs are tangent. The included angle theta between the upper bevel edge and the lower bevel edge is 1.5 degrees larger than the included angle alpha between the upper edge 1201 and the lower edge 1202 of the product groove type. The five sections of circular arcs comprise two sections of circular arcs I R1 respectively connected with the upper bevel edge and the lower bevel edge, two sections of circular arcs II R2 respectively connected with the two sections of circular arcs I R1, and circular arcs III R3 with two ends respectively connected with the two sections of circular arcs II R2. Arc one, R1, is tangent to the upper or lower beveled edge to which it is attached. The radius of the circle where the first arc is located is smaller than that of the circle where the second arc is located. The radius of the circle where the second arc is located is smaller than that of the circle where the third arc is located. The radius of arc one R1 is 9 mm. The radius of the second circular arc R2 is 17 mm. The radius of the circular arc three R3 is 21 mm.
Claims (5)
1. The utility model provides a make big V formula spinning frock for belt pulley of big groove depth multislot which characterized in that: the device comprises a core mold clamp for pressing a product blank, wherein the core mold clamp comprises an upper core mold (7) in transmission connection with an upper connecting disc of spinning equipment and a lower core mold (2) in transmission connection with a lower connecting disc of the spinning equipment; a mold core (5) is arranged in the lower core mold (2); the upper end of the mold core (5) is provided with an ejector (6) matched with the shape of the product; an inner core mold (4) is arranged between the lower core mold (2) and the core mold (5); the inner core mold (4) consists of a plurality of split molds; the rotary wheel is arranged on a rotary wheel fixing seat (11); the rotary wheel is arranged corresponding to the product blank clamped by the core mold clamp; the spinning wheel comprises a forming wheel (10);
the rotary wheel also comprises a pre-forming wheel (9);
the pre-forming wheel (9) is provided with N forming teeth; n is the number of grooves required to be formed in the product;
the height Ht of the forming teeth is 9-13 mm larger than the width Hg of the product notch;
the length Lt of the forming teeth is 1-3 mm smaller than the depth Dg of the product groove; the product groove depth Dg is more than 25 mm;
the cross sections of the working surfaces of the forming teeth are the same in shape;
the cross section of the working surface of the forming tooth is formed by an upper bevel edge (901), a lower bevel edge (902) and five sections of circular arcs connecting the upper bevel edge (901) and the lower bevel edge (902); the circles of the two adjacent circular arcs are tangent;
the five sections of circular arcs comprise two sections of circular arcs I R1 respectively connected with the upper bevel edge (901) and the lower bevel edge (902), two sections of circular arcs II R2 respectively connected with the two sections of circular arcs I R1, and circular arcs III R3 with two ends respectively connected with the two sections of circular arcs II R2; the first arc R1 is tangent with the upper bevel edge or the lower bevel edge connected with the first arc R1; the radius of the circle where the first circular arc R1 is located is smaller than that of the circle where the second circular arc R2 is located; the radius of the circle where the second arc R2 is located is smaller than that of the circle where the third arc R3 is located;
the included angle theta between the upper bevel edge (901) and the lower bevel edge (902) is 1-5 degrees larger than the included angle alpha between the upper edge (1201) and the lower edge (1202) of the product groove type.
2. The spinning tool for manufacturing the large-groove-depth multi-groove large-V-shaped spinning belt pulley according to claim 1, is characterized in that: the radius of the first circular arc R1 is 8-12 mm;
the radius of the second circular arc R2 is 14-18 mm;
the radius of the circular arc three R3 is 20-24 mm.
3. The spinning tool for manufacturing the large-groove-depth multi-groove large-V-shaped spinning belt pulley according to claim 2, is characterized in that: the radius of the first circular arc R1 is 9-11 mm;
the radius of the second circular arc R2 is 15-17 mm;
the radius of the circular arc three R3 is 21-23 mm.
4. The spinning tool for manufacturing the large-groove-depth multi-groove large-V-shaped spinning belt pulley according to claim 1, is characterized in that: the included angle theta between the upper bevel edge (901) and the lower bevel edge (902) is 1-3 degrees larger than the included angle alpha between the upper edge (1201) and the lower edge (1202) of the product groove type.
5. The spinning tool for manufacturing the large-groove-depth multi-groove large-V-shaped spinning belt pulley according to claim 1, is characterized in that: and the N is 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220326368.7U CN216757788U (en) | 2022-02-14 | 2022-02-14 | Spinning tool for manufacturing large-groove-depth multi-groove large-V-shaped spinning belt pulley |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220326368.7U CN216757788U (en) | 2022-02-14 | 2022-02-14 | Spinning tool for manufacturing large-groove-depth multi-groove large-V-shaped spinning belt pulley |
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| CN216757788U true CN216757788U (en) | 2022-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220326368.7U Active CN216757788U (en) | 2022-02-14 | 2022-02-14 | Spinning tool for manufacturing large-groove-depth multi-groove large-V-shaped spinning belt pulley |
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