CN115990640A - 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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- CN115990640A CN115990640A CN202210148777.7A CN202210148777A CN115990640A CN 115990640 A CN115990640 A CN 115990640A CN 202210148777 A CN202210148777 A CN 202210148777A CN 115990640 A CN115990640 A CN 115990640A
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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 preforming wheel. The height Ht of the forming teeth of the preforming wheel is 9-13 mm greater than the width Hg of the notch of the product, and the length Lt is 1-3 mm smaller than the depth Dg of the notch of the product; dg is greater than 25mm. The cross section of the working surface of the forming tooth is composed 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 where the adjacent two circular arcs are located are tangent. The five sections of arcs comprise two sections of arcs I R1, two sections of arcs II R2 and arcs III R3; the arc R1 is tangent with the upper bevel edge or the lower bevel edge connected with the arc R1; the radius of the circle where the arc I R1 is positioned is smaller than the radius of the circle where the arc II R2 is positioned; the radius of the circle where the arc II R2 is located is smaller than the radius of the circle where the arc III R3 is located. The included angle theta between the upper oblique side and the lower oblique side is 1-5 degrees larger than the included angle alpha between the upper edge and the lower edge of the groove type product. The invention solves the problem that the large V-shaped spinning belt pulley with the groove depth larger 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 invention 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-type spinning belt pulley.
Background
At present, spinning pulleys with large V-shaped structures in automobiles, agricultural machinery and engineering machinery are widely applied, and compared with the spinning pulleys with large V-shaped structures, the spinning pulleys with large V-shaped structures have the advantages of low material consumption, less working procedures and simple dies. The groove depth of the large V-shaped spinning belt pulley widely used at present is generally lower than 20mm, along with the technical development, the market puts forward higher requirements on products, the groove depth of the large V-shaped spinning belt pulley required at present is more than 25mm, the existing forming equipment and process can be used for forming products with the groove depth of 25mm, breakage does not occur in the forming process, breakage occurs frequently in the use process of the formed products, and the use safety is poor.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the spinning tool for manufacturing the large-groove-depth multi-groove large-V-type spinning belt pulley, which effectively improves the strength of the large-V-type spinning belt pulley and ensures the safety of the large-V-type spinning belt pulley in the use process.
The technical scheme of the invention is as follows: the spinning tool for manufacturing the large-groove-depth multi-groove large-V-shaped spinning belt pulley comprises a core mold clamp for compacting a product blank, wherein the core mold clamp comprises an upper core mold in transmission connection with an upper connecting disk of spinning equipment and a lower core mold in transmission connection with a lower connecting disk of the spinning equipment; the lower core mould is internally provided with a mould core; the upper end of the mold core is provided with an ejector which is matched with the shape of the product; an inner core mould is arranged between the lower core mould and the mould core; the inner core die consists of a plurality of split dies; 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 also includes a preform wheel.
The preformed wheel is provided with N forming teeth; and N is the number of grooves to be formed of the product. .
The height Ht of the forming teeth is 9-13 mm greater than the width Hg of the notch of the product.
The length Lt of the formed teeth is 1-3 mm smaller than the groove depth Dg of the product; the groove depth Dg of the product is greater than 25mm.
The cross-sectional shape of the working surface of each forming tooth is the same.
The cross section of the working surface of the forming tooth is composed 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 where the adjacent two circular arcs are located are tangent.
The five sections of arcs comprise two sections of arc I R1 connected with the upper oblique side and the lower oblique side respectively, two sections of arc II R2 connected with the two sections of arc I R1 respectively, and arc III R3 with two ends connected with the two sections of arc II R2 respectively; the arc I R1 is tangent with an upper oblique side or a lower oblique side connected with the arc I R1; the radius of the circle where the first arc R1 is located is smaller than the radius of the circle where the second arc R2 is located; the radius of the circle where the arc II R2 is located is smaller than the radius of the circle where the arc III R3 is located.
And the included angle theta between the upper inclined edge and the lower inclined edge is 1-5 degrees larger than the included angle alpha between the upper edge and the lower edge of the groove type product.
The radius of the arc R1 is 8-12mm; the radius of the arc II R2 is 14-18mm; the radius of the arc tri-R3 is 20-24mm.
The radius of the arc R1 is 9-11mm; the radius of the arc II R2 is 15-17mm; the radius of the arc tri-R3 is 21-23mm.
And the included angle theta between the upper inclined edge and the lower inclined edge is 1-3 degrees larger than the included angle alpha between the upper edge and the lower edge of the groove type product.
And N is 2.
The invention is characterized in that in the spinning forming process of the large V-shaped spinning belt pulley, the material has bending deformation and plastic deformation, the groove bottom part of the large V-shaped spinning belt pulley is the part with the largest stress in the forming process, the plastic deformation is the largest part, and the thickness of the groove bottom is necessarily smaller than the thickness of a plate. The inventor researches and discovers that the groove depth of the large V-shaped spinning belt pulley widely used at present is generally lower than 20mm, the plastic deformation amount of the groove depth is small 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 greater than that of the large V-shaped spinning belt pulley with the groove depth of lower than 20 mm. The thickness of the groove bottom of the large groove depth multi-groove large V-shaped spinning belt pulley manufactured by the prior related technology is only 50% of the thickness of a plate material, and the insufficient thickness of the groove bottom part 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 service condition analysis, the thickness of the groove bottom is required to reach at least 70% of the thickness of the original plate material after plastic deformation, and the groove bottom cannot break during the use process.
The invention has the technical effects that: the invention solves the problem that the large V-shaped spinning belt pulley with the groove depth larger than 25mm is easy to break in the use process, and the pre-forming wheel with the brand new design ensures that the thickness of the groove bottom part of the spun product is larger than 70% of the thickness of the plate, improves the strength of the large-groove-depth multi-groove large V-shaped spinning belt pulley and ensures the safety of the large-groove-depth multi-groove 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 structural view of the preform wheel.
Fig. 3 is a schematic structural view of a large V-spinning 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 core mould, 6, an ejector, 7, an upper core mould, 8, an upper connecting disc, 9, a preformed wheel, 10, a forming wheel, 11, a rotating wheel fixing seat, 12 and a product.
Detailed Description
In fig. 1, a lower coupling disc 1 of the spinning device is coupled with a lower core die 2 through a screw, and a spigot is tightly matched between the lower coupling disc and the lower core die. The lower core mould 2 is internally provided with a forming block 3, and the forming block are in sliding fit. The mold core 5 is arranged in the molding block 3, and a spigot sliding fit is adopted between the molding block and the mold core. An inner core mould 4 is arranged between the forming block 3 and the mould core 5, and the inner core mould 4, the forming block 3 and the mould core 5 are in sliding fit. The lower core mould 2 and the mould core 5 are tightly matched; the accuracy and rigidity of the support of the inner core mold 4 are increased while the inner core mold 4 is ensured not to be scattered when being put in. The ejector 6 is arranged in the mold core 5, and a spigot sliding fit is adopted between the ejector and the mold core. Under the driving of the lower connecting disc 1 of the spinning equipment, the lower core mould 2, the forming block 3, the inner core mould 4, the mould core 5 and the ejector 6 can be driven to rotate. The upper connecting disc 8 of the spinning device is connected with the upper core mould 7 through a screw, and the two are tightly matched through a spigot. The upper coupling disk 8 can drive the upper core mold 7 to realize up and down reciprocating motion, and can synchronously rotate with the lower coupling disk 1. The preformed wheel 9 is fixed on a spinning roller fixing seat 11 of spinning equipment, left and right reciprocating motion can be realized under the driving of the spinning equipment, a bearing is arranged between the preformed wheel 9 and the spinning roller fixing seat 11, and the preformed wheel 9 can realize reverse rotation with the product 12 in the process of extruding the product 12. The forming wheel 10 is fixed on a spinning roller fixing seat 11 of spinning equipment, left and right reciprocating motion can be realized under the driving of the spinning equipment, a bearing is arranged between the forming wheel 10 and the spinning roller fixing seat 11, and the forming wheel 10 can realize reverse rotation with the product 12 in the process of extruding the product 12.
The preform wheel 9 has 2 shaped teeth. The cross-sectional shape of the working surface of each forming tooth is the same. The cross-sectional shape of the formed tooth face is composed of an upper bevel 901, a lower bevel 902, and five circular arcs connecting the upper bevel 901 and the lower bevel 902. The circles where the adjacent two circular arcs are located are tangent. The arc gradually increases from the upper bevel edge part of one side to the central part and then gradually decreases to the lower bevel edge part of the other side, and the two sides are symmetrical structures. The five sections of arcs comprise two sections of arc I R1 connected with the upper bevel edge and the lower bevel edge respectively, two sections of arc II R2 connected with the two sections of arc I R1 respectively, and arc III R3 with two ends connected with the two sections of arc II R2 respectively. The arc R1 is tangent with the upper bevel or the lower bevel connected with the arc R1. The radius of the circle where the arc I is located is smaller than that of the circle where the arc II 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, firstly, the blank of the product 12 is placed into the clamping groove between the lower core mould 2 and the forming block 3. The upper core die 7 is driven to descend by the upper connecting disc 8, and after the upper core die 7 is attached to the product 12, the upper connecting disc 8 and the lower connecting disc 1 start to synchronously rotate and drive the product 12 to rotate. The preformed wheel 9 moves under the drive of the rotary wheel fixing seat 11 until the preformed wheel is close to the product 12, the preformed wheel 9 reversely rotates relative to the product 12 and continuously feeds the extruded product 12, meanwhile, the upper core die 7 downwards presses the product 12, the inner cavity of the product 12 is supported by the inner core die 4, the product 12 is bent and folded, and when the product straight edge height is two-thirds of the blank height, the preformed wheel 9 is withdrawn. The forming wheel 10 is driven by the rotary wheel fixing seat 11 to move, the forming wheel 10 is close to the product 12 until the forming wheel is contacted, the forming wheel 10 reversely rotates relative to the product 12 and continuously feeds the extruded product 12, meanwhile, the upper core die 7 continuously descends to press the product 12, the inner cavity of the product 12 is supported by the inner core die 4, and the product 12 continuously generates bending and folding until the product 12 and the forming block 3, the upper core die 7, the forming wheel 10 and the inner core die 4 are completely adhered to the die. 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 mold core 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 preform wheel 9 provided by the present invention has 2 molded teeth thereon. The forming tooth height Ht is 11.5mm greater than the product slot width Hg. The formed tooth length Lt is 1.2mm less than the product groove depth Dg. The cross-sectional shape of the working surface of each forming tooth is the same. The cross-sectional shape of the formed tooth face is composed of an upper bevel 901, a lower bevel 902, and five circular arcs connecting the upper bevel 901 and the lower bevel 902. The circles where the adjacent two circular arcs are located are tangent. The angle θ of the upper and lower hypotenuses is 1.5 ° greater than the angle α of the upper 1201 and lower 1202 sides of the product slot. The five sections of arcs comprise two sections of arc I R1 connected with the upper bevel edge and the lower bevel edge respectively, two sections of arc II R2 connected with the two sections of arc I R1 respectively, and arc III R3 with two ends connected with the two sections of arc II R2 respectively. The arc R1 is tangent with the upper bevel or the lower bevel connected with the arc R1. The radius of the circle where the arc I is located is smaller than that of the circle where the arc II 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 the arc R1 is 9mm. The radius of the arc II R2 is 17mm. The radius of the arc tri-R3 is 21mm.
Claims (5)
1. A spinning frock for manufacturing big groove depth multislot big V formula spinning belt pulley, its characterized in that: the mandrel clamp comprises an upper mandrel (7) in transmission connection with an upper connecting disc of spinning equipment and a lower mandrel (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) which is matched with the shape of the product; an inner core mould (4) is arranged between the lower core mould (2) and the mould core (5); the inner core die (4) consists of a plurality of split dies; the rotary wheel is arranged on the 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 spinning wheel also comprises a preformed wheel (9);
the preformed wheel (9) is provided with N forming teeth; the N is the number of grooves to be formed of the product;
the height Ht of the forming teeth is 9-13 mm greater than the width Hg of the notch of the product;
the length Lt of the formed teeth is 1-3 mm smaller than the groove depth Dg of the product; the groove depth Dg of the product is more than 25mm;
the cross section shape of the working surface of each forming tooth is the same;
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 circular arcs connecting the upper bevel edge (901) and the lower bevel edge (902); the circles of two adjacent circular arcs are tangent;
the five sections of arcs comprise two sections of first arcs R1 connected with an upper bevel edge (901) and a lower bevel edge (902) respectively, two sections of second arcs R2 connected with the two sections of first arcs R1 respectively, and three arcs R3 with two ends connected with the two sections of second arcs R2 respectively; the arc I R1 is tangent with an upper oblique side or a lower oblique side connected with the arc I R1; the radius of the circle where the first arc R1 is located is smaller than the radius of the circle where the second arc R2 is located; the radius of the circle where the second arc R2 is located is smaller than the radius of the circle where the third arc R3 is located;
the included angle theta between the upper inclined edge (901) and the lower inclined 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.
2. The spinning tool for manufacturing the large-groove-depth multi-groove large-V-shaped spinning belt pulley according to claim 1, wherein: the radius of the arc R1 is 8-12mm;
the radius of the arc II R2 is 14-18mm;
the radius of the arc tri-R3 is 20-24mm.
3. The spinning tool for manufacturing the large-groove-depth multi-groove large-V-shaped spinning pulley according to claim 2, wherein: the radius of the arc R1 is 9-11mm;
the radius of the arc II R2 is 15-17mm;
the radius of the arc tri-R3 is 21-23mm.
4. The spinning tool for manufacturing the large-groove-depth multi-groove large-V-shaped spinning belt pulley according to claim 1, wherein: the included angle theta between the upper inclined edge (901) and the lower inclined 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.
5. The spinning tool for manufacturing the large-groove-depth multi-groove large-V-shaped spinning belt pulley according to claim 1, wherein: and N is 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210148777.7A CN115990640A (en) | 2022-02-14 | 2022-02-14 | Spinning tool for manufacturing large-groove-depth multi-groove large-V-shaped spinning belt pulley |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210148777.7A CN115990640A (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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| Publication Number | Publication Date |
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| CN115990640A true CN115990640A (en) | 2023-04-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210148777.7A Pending CN115990640A (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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| CN (1) | CN115990640A (en) |
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- 2022-02-14 CN CN202210148777.7A patent/CN115990640A/en active Pending
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