CN114247803B - Sprocket stamping processing technology and sprocket blanking die - Google Patents
Sprocket stamping processing technology and sprocket blanking die Download PDFInfo
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- CN114247803B CN114247803B CN202111462344.0A CN202111462344A CN114247803B CN 114247803 B CN114247803 B CN 114247803B CN 202111462344 A CN202111462344 A CN 202111462344A CN 114247803 B CN114247803 B CN 114247803B
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- 238000005516 engineering process Methods 0.000 title abstract description 7
- 238000005520 cutting process Methods 0.000 claims abstract description 92
- 238000004080 punching Methods 0.000 claims abstract description 45
- 238000000034 method Methods 0.000 claims abstract description 40
- 239000000463 material Substances 0.000 claims abstract description 39
- 239000002994 raw material Substances 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims description 30
- 230000000149 penetrating effect Effects 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000003754 machining Methods 0.000 description 9
- 238000007493 shaping process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009954 braiding Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D28/00—Shaping by press-cutting; Perforating
- B21D28/24—Perforating, i.e. punching holes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/26—Making other particular articles wheels or the like
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Punching Or Piercing (AREA)
Abstract
The application relates to a sprocket stamping processing technology, which relates to the field of automobile part processing and comprises the following steps of firstly, preparing a raw material, and preparing a plate raw material; blanking, namely punching a first chain wheel rough blank with the required chain wheel outline from a plate raw material by using a stamping die, wherein chain teeth are stamped on the peripheral side of the first chain wheel rough blank, and a central hole is coaxially and penetratingly formed in the first chain wheel rough blank; step three, punching a first sprocket rough blank by using a punching die to obtain a second sprocket rough blank, wherein the second sprocket rough blank is provided with a mounting hole and a positioning hole in a punching mode; step four, semi-fine stamping, namely cutting off part of the remainder on the sprocket rough blank II by using a stamping die to obtain a sprocket rough blank III; and fifthly, finely stamping, namely cutting off the residual materials on the rough blank of the chain wheel by using a stamping die to obtain a primary finished product. The manufacturing efficiency of the chain wheel is effectively improved by using a stamping process. The application also discloses a blanking mould for carrying out sprocket blanking, has effectively reduced the required stamping force of blanking process, has reduced technology cost.
Description
Technical Field
The application relates to the field of automobile part machining, in particular to a sprocket stamping processing technology and a sprocket blanking die.
Background
The sprocket is a cog sprocket wheel for meshing with precisely pitched blocks on links or cables. The timing chain wheel is one kind of chain wheel, and its function is equivalent to timing belt, and is an important component of engine gas distribution system, and can ensure accuracy of gas inlet and exhaust time by means of connection with crankshaft and matching with a certain transmission ratio.
In the related art, a timing sprocket generally adopts a thread rolling process to process the sprocket on the peripheral side, and the sprocket on the peripheral side of the sprocket needs to be cut out little by little, so that the processing efficiency is low.
In view of the above related art, the inventors provide a new sprocket manufacturing process.
Disclosure of Invention
In a first aspect, the present application provides a sprocket stamping process, which adopts the following technical scheme:
a sprocket stamping process comprising:
step one, preparing a raw material, namely preparing a plate raw material;
blanking, namely punching a first chain wheel rough blank with a required chain wheel outline from a plate raw material by using a punching die, wherein chain teeth are punched on the peripheral side of the first chain wheel rough blank, and a central hole is coaxially and penetratingly formed in the first chain wheel rough blank;
punching a first sprocket rough blank by using a punching die to obtain a second sprocket rough blank, wherein the second sprocket rough blank is provided with a mounting hole and a positioning hole in a punching mode;
step four, semi-fine stamping, namely cutting off part of the remainder on the sprocket rough blank II by using a stamping die to obtain a sprocket rough blank III;
and fifthly, finely stamping, namely cutting off the residual materials on the rough blank of the chain wheel by using a stamping die to obtain a primary finished product.
By adopting the technical scheme, the chain wheel is punched by using the stamping process, the processing efficiency of the chain teeth on the periphery of the chain wheel can be greatly improved, and the production efficiency of the chain wheel can be effectively improved. The primary finished product of the chain wheel is obtained through blanking, punching, semi-fine punching and fine punching, the chain wheel with required specification is obtained through step-by-step punching, the cutting force required by single punching is reduced, the equipment requirement is reduced, and the cost is controlled; meanwhile, the punching is carried out for multiple times in multiple times of punching, so that the single cutting amount can be reduced, the loss of a die is reduced, and the precision of a finished product is improved. The process gives consideration to the efficiency and cost of chain wheel production, and can better ensure the quality of products.
Optionally, a round boss is formed by punching and stretching the center of the first sprocket rough blank, and the center hole is formed in the boss;
the second step comprises: s21, starting to punch the outline of the sprocket; s22, starting to punch the boss when the sprocket punches the rest two-thirds to one-third of the thickness; s23, when the sprocket punches the thickness of the remaining two-fifths to one-fifth, punching the center hole is started.
Through adopting above-mentioned technical scheme, when sprocket punching sprocket's in-process, blanking to panel middle part, the cutting force that cuts the panel needs can increase suddenly, under this circumstances, carries out the punching of boss in step, can reduce the required cutting force of blanking sprocket. The stamping die begins to punch the boss on the middle part of the plate, shearing of edges and stamping in the middle can produce a pulling effect on the plate between the boss and the sprocket, and cutting force required by blanking the sprocket is reduced. When the chain teeth are ready to be punched, namely, the plate surplus materials are ready to be separated from the chain tooth structure, strong vibration can be generated at the moment of separation, and the quality of the chain wheel is easy to influence; when the plate surplus material is about to be separated from the sprocket structure, the stamping die starts to punch the central hole, the stamping die can punch the right central part of the first rough blank of the sprocket, the center of the plate is pressed and stabilized, and the influence of vibration is reduced. Meanwhile, due to the fact that vibration influence is reduced and cutting force is reduced, noise generated in the blanking stamping process can be effectively reduced.
Optionally, the protruding direction of the boss is the same as the cutting direction of the sprocket.
Through adopting above-mentioned technical scheme, the protruding direction of boss is the same with the cutting direction of sprocket, and the panel both sides atress direction between boss and the sprocket is the same promptly, and the panel can receive apparent pulling near the blanking mould's of sprocket one side, and under this atress condition, the sprocket is more apparent with the pulling effect that panel separation position received, and the required cutting force of sprocket blanking can more effectively reduce.
Optionally, S22, when the sprocket is punched to have half the thickness, starting to punch the boss; s23, when the sprocket is punched to the remaining quarter thickness, the central hole is punched.
Optionally, in the fourth step, cutting off the mounting holes and the remainder on the sprocket to obtain the mounting holes with accurate size and the sprocket with a small amount of remainder; and fifthly, cutting off the remainder at the sprocket part to obtain the sprocket with accurate size.
Through adopting above-mentioned technical scheme, each structure on the step-by-step finish machining sprocket, the sprocket carries out finish machining alone at last again, and cutting force, cutting volume are all lower, and the mould wear can be lower, and the precision is guaranteed more easily, can effectively ensure sprocket quality of sprocket week side.
Optionally, step four includes, S41, starting to punch the mounting hole; s42, when the mounting hole is punched to a thickness of one third to two thirds, the sprocket is punched.
By adopting the technical scheme, the stamping flow is optimized, the mounting hole with smaller cutting quantity is firstly cut, the initial load is smaller, the die can be stably pressed down, when the mounting hole is cut to the thickness of one third to two thirds, the die and the second rough blank of the chain wheel are already stable, then the chain tooth is punched, and the stamping of the chain tooth is optimized; meanwhile, when the mounting hole is successfully blanked, the position of the mounting hole is not stressed due to the fact that materials are separated, the whole workpiece can generate larger vibration, half of the procedure of blanking the sprocket can ensure that the die presses and stabilizes the whole workpiece, vibration of the workpiece is reduced, and the precision of the final mounting hole is guaranteed.
In a second aspect, the present application provides a sprocket blanking die for the above sprocket stamping process, which adopts the following technical scheme:
the sprocket blanking die comprises an upper die holder and a lower die holder, wherein a lower female die is arranged on the lower die holder, the lower female die is a cylinder with a gear-shaped end surface outline, the center of the lower female die is coaxially penetrated and provided with a central blanking hole, the central blanking hole penetrates through the lower die holder, and a boss forming groove is coaxially arranged on the end surface, far away from the lower die holder, of the lower female die;
a sprocket cutting die, a boss forming press block and a center Kong Caiqie die are arranged on one side, close to the lower female die, of the upper die base, a gear-shaped avoidance through hole is formed in the center of the sprocket cutting die, corresponding to the outer contour of the lower female die, the boss forming press block is positioned in the avoidance through hole on the sprocket cutting die, and the center Kong Caiqie die is a male die coaxially arranged on one side, close to the lower female die, of the boss forming press block;
and the thickness of the raw material plate to be processed is x, the lower end faces of the sprocket cutting die and the central hole cutting die are both positioned below the boss forming pressing block, the distance between the lower end face of the central hole cutting die and the lower end face of the boss forming pressing block is greater than x, and the distance between the lower end face of the sprocket cutting die and the lower end face of the boss forming pressing block is one third x to two thirds x.
By adopting the technical scheme, the sprocket cutting die is matched with the lower female die to cut the plate, the sprocket profile on the periphery of the plate is punched out, and the sprocket rough blank I is separated from the plate main body; the boss forming pressing block is matched with the boss forming groove to punch a boss on the first rough blank of the chain wheel; the center Kong Caiqie die is matched with the center blanking hole to punch out a center hole structure. Through reasonably setting the position relation among the sprocket cutting die, the boss forming pressing block and the central hole cutting die, the sprocket cutting die, the boss forming pressing block and the central Kong Caiqie die are matched with the lower female die and the boss forming groove and the central blanking hole structure on the lower female die step by step, so that the step stamping of the sprocket rough blank I is realized.
Optionally, the distance between the lower end face of the sprocket cutting die and the lower end face of the boss forming press block is 12, and the distance between the lower end face of the sprocket cutting die and the lower end face of the center hole cutting die is greater than-34.
By adopting the technical scheme, when the sprocket cutting die cuts the sprocket to the half position of the plate, the boss forming press block contacts the plate, and the boss is punched and the plate is stretched; when the sprocket cutting die cuts the sprocket to about one third of the position, the central hole cutting die abuts against the plate, the position of the plate corresponding to the central hole cutting die is tightly attached to the boss forming groove on the lower female die, and the central Kong Caiqie die starts to punch the central hole. The distance between the lower end face of the sprocket cutting die and the lower end face of the central hole cutting die is larger than-34, so that the central hole can be thoroughly opened.
Optionally, the die further comprises a material supporting plate arranged on the lower die holder, a supporting spring is arranged between the material supporting plate and the lower die holder, a lower equal-height bolt is arranged between the material supporting plate and the lower die holder, and the upper plane of the material supporting plate is flush with the upper end face of the lower die.
Through adopting above-mentioned technical scheme, panel can place in the material backup pad before the punching press, under the effect of supporting spring at the in-process material backup pad of punching sprocket rough blank one, supports tight panel all the time, helps the smooth punching press of sprocket.
Optionally, the boss shaping briquetting slides and is arranged in dodging the through-hole on the sprocket cutting die, the center of boss shaping briquetting corresponds the center Kong Caiqie mould is run through and is seted up dodging the through-hole, boss shaping briquetting slides and is arranged in dodging the through-hole on the boss shaping briquetting, the upper die holder includes upper base, first cope match-plate pattern and second cope match-plate pattern are installed in proper order the upper base is close to one side of boss shaping briquetting, boss shaping briquetting is close to one side of second cope match-plate pattern is fixed with the high bolt of upper contour and hangs on the second cope match-plate pattern through the high bolt of upper contour, the guide through-hole has been seted up in the first cope match-plate pattern is run through corresponding the head of high bolt of upper contour, the last through and is seted up the sliding hole, the high bolt of upper base all is located in the sliding hole, the downthehole sliding of sliding is inserted and is equipped with the clamp plate; when the pressing plate is abutted to the first upper template, the pressing plate is abutted to the head of the upper contour bolt, and the upper end face of the pressing plate is flush with the upper end face of the upper base.
By adopting the technical scheme, in the process of completing stamping reset of the upper die part, the pressing plate can be pressed into sliding, the pressing plate can press down the contour bolt, the boss forming pressing block moves downwards to prop out the sprocket rough blank in the first avoiding hole, and the automatic material returning function is realized; the upper contour bolts are arranged in a plurality, the upper contour bolts can be synchronously pressed by sliding the pressing plate arranged in the sliding hole, so that the boss forming pressing block can be ensured to stably move downwards, and smooth material returning is ensured; and because boss shaping briquetting is laminated with sprocket rough blank's up end, sprocket rough blank can be stable along the axial withdrawal first hole of dodging, sprocket rough blank is difficult for taking place the damage at the material in-process of returning, and the mould is also difficult for receiving the damage.
In summary, the present application includes at least one of the following beneficial technical effects:
the sprocket on the peripheral side of the sprocket can be efficiently machined by utilizing a stamping process, and because the sprocket has high machining precision requirements on the sprocket, after a rough blank of the sprocket is stamped, the sprocket, the mounting holes and other structures are machined for multiple times, so that the machining precision of the sprocket can be effectively ensured, the circumferential positions of the sprocket in each process can be ensured not to deviate by stamping the locating holes and the mounting holes, and the machining precision of the sprocket on the peripheral side of the sprocket is further ensured;
through setting the blanking process as multistage punching, the sprocket is cut in advance, and the punching of boss and the punching of centre bore are carried out in proper order in the sprocket blanking process, have effectively reduced the stamping force that blanking in-process needs, have still reduced the vibration that takes place when sprocket rough blank and the clout separation simultaneously, both can control the cost of improvement technology, can ensure the quality of sprocket again.
Drawings
FIG. 1 is a schematic view of the overall construction of a timing sprocket according to the present application;
FIG. 2 is a schematic cross-sectional view of a timing sprocket according to the present application;
FIG. 3 is a process flow diagram of a sprocket stamping process disclosed in an embodiment of the present application;
fig. 4 is a schematic diagram of the overall structure of a blanking die for a sprocket according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram II of the overall structure of a blanking die for a sprocket disclosed in the embodiment of the present application;
FIG. 6 is a schematic diagram showing a stamping state of a sprocket blanking die according to an embodiment of the present disclosure;
fig. 7 is a second schematic diagram of a stamping state of a sprocket blanking die according to an embodiment of the present disclosure;
fig. 8 is a third schematic drawing of a stamping state of a sprocket blanking die disclosed in an embodiment of the present application;
fig. 9 is a schematic diagram four of a stamping state of a sprocket blanking die according to an embodiment of the present disclosure.
Reference numerals: 01. a boss; 02. sprocket teeth; 03. a central bore; 04. a mounting hole; 05. positioning holes; 1. an upper die holder; 11. an upper base; 111. a slip hole; 12. a first upper template; 13. a second upper template; 14. a third upper template; 15. a guide hole; 16. a pressing plate; 17. an upper contour bolt; 2. a lower die holder; 21. a lower base; 22. a first lower template; 23. a second lower die plate; 231. a spring groove; 24. a material support plate; 25. a guide post; 26. a lower contour bolt; 27. a support spring; 3. a lower female die; 31. a central blanking hole; 32. a boss forming groove; 4. a sprocket cutting die; 5. forming a pressing block by a boss; 6. a center Kong Caiqie die.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-9.
Referring to fig. 1 and 2, a timing sprocket related to the present application is coaxially provided with a boss 01, and a mounting hole 04 and a positioning hole 05 are provided through the boss 01, and a plurality of sprockets 02 are integrally provided on the circumference side of the main sprocket along the circumferential direction thereof.
In one aspect, an embodiment of the present application discloses a sprocket stamping process, referring to fig. 3, comprising:
step one, preparing a raw material, namely preparing a rectangular long strip plate-shaped raw material.
And secondly, blanking, namely punching a first chain wheel rough blank with the required chain wheel outline from the plate raw material by using a punching die, wherein the chain teeth 02 are punched on the peripheral side of the first chain wheel rough blank, a boss 01 with a circular outline is formed by punching and stretching the center of the first chain wheel rough blank, and a center hole 03 is coaxially formed in the center of the boss 01 in a penetrating mode.
And thirdly, punching, namely punching a mounting hole 04 and a positioning hole 05 on the first sprocket rough blank by using a punching die to obtain the second sprocket rough blank.
And fourthly, semi-fine stamping, namely cutting off the mounting hole 04 and the surplus material on the sprocket 02 by using a stamping die to obtain the mounting hole 04 with accurate size and the sprocket 02 with a small amount of surplus material, and obtaining a sprocket rough blank III.
And fifthly, finely stamping, namely cutting off the remainder of the sprocket 02 part by using a stamping die to obtain the sprocket 02 with accurate size, and obtaining a primary finished product.
Step six, deburring the primary finished product;
step seven, heat treatment is carried out, and the preliminary finished product is subjected to heat treatment, so that a finished sprocket product is obtained;
step eight, centrifugally polishing a finished product of the chain wheel;
step nine, cleaning and rust-preventing finished sprocket products;
and step ten, packaging and warehousing finished chain wheel products.
The sprocket 02 on the periphery of the sprocket can be rapidly machined by stamping, and the machining efficiency of the sprocket is greatly improved compared with the traditional thread rolling process for machining the sprocket; meanwhile, the sprocket 02 structure with accurate size is obtained through three steps of blanking, semi-fine blanking and fine blanking, on one hand, the material cutting amount of each step can be effectively reduced, the die loss is reduced, the accuracy of the sprocket 02 is improved, on the other hand, the requirement on the stamping force of equipment is reduced, the replacement frequency of the die is reduced, the equipment cost generated by a conversion process can be controlled, and the feasibility is improved.
In the second step, the punching direction of the sprocket 02 is the same as the protruding direction of the boss 01. The second step specifically comprises the following steps: s21, starting to punch the outline of the sprocket 02; s22, starting to punch the boss 01 when the sprocket 02 is punched to have the thickness of the rest two thirds to one third; s23, when the sprocket 02 is blanked to a thickness of the remaining two-fifths to one-fifth, the blanking of the center hole 03 is started. In this embodiment, S22, when the sprocket 02 is blanked to a half thickness, the boss 01 is started to be punched; s23, when the sprocket 02 is blanked to a remaining quarter thickness, the center hole 03 is blanked.
The fourth step specifically comprises the following steps: s41, starting to punch the mounting holes 04; s42, when the mounting hole 04 is punched to a thickness of one third to two thirds, starting to punch the sprocket 02; in this embodiment, when the mounting hole 04 is punched to half the plate thickness, the sprocket 02 starts to be punched.
The working principle of the sprocket stamping processing technology disclosed by the embodiment of the application is as follows: the stamping process can directly recharge all the chain teeth 02 on the periphery of the chain teeth 02, and the chain wheel processing efficiency can be effectively improved; the sprocket with the finished structure is prepared through blanking and perforating two-step procedures, the stamping force and the material cutting amount of single stamping are effectively reduced, the quality of the sprocket is improved, and the requirement on the stamping force of stamping equipment is reduced; mounting holes 04 and sprocket 02 with accurate sizes are respectively finished through two procedures of semi-fine punching and fine punching, and the sprocket 02 is processed into accurate sizes through two procedures of semi-fine punching and fine punching, so that the machining precision of the sprocket is effectively guaranteed. In the process of cutting the plate by using the stamping tool, the required stamping force is greatly increased when the plate is cut to the middle part of the plate, on one hand, the requirement on the stamping force of equipment is extremely high, on the other hand, the requirement on a die is relatively high, the die wear is more serious, and the process cost is greatly increased; in the blanking process, the cutting range of the sprocket 02 part is maximum, the structure is most complex, the influence of the change of cutting force is also maximum, the boss 01 is punched after the sprocket 02 is punched in advance, and when the sprocket 02 part is punched to the middle position of a plate, the plate is stretched through the boss 01, so that the strength of the plate is reduced, and the blanking of the sprocket 02 is facilitated.
On the other hand, the embodiment of the application also discloses a sprocket blanking die for a complaining process, and referring to fig. 4, the sprocket blanking die comprises an upper die holder 1 and a lower die holder 2, wherein a lower female die 3 is arranged on the lower die holder 2, and a sprocket cutting die 4, a boss forming press block 5 and a central hole cutting die 6 are arranged on the upper die holder 1.
The lower die holder 2 comprises a lower base 21, a first lower die plate 22 arranged on the lower base 21 and a second lower die plate 23 arranged on the first lower die plate 22, and the lower base 21, the first lower die plate 22 and the second lower die plate 23 are connected and fixed through bolts; the lower base 21 is provided with a guide post 25, and the guide post 25 penetrates through the first lower template 22 and the second lower template 23; the lower female die 3 is fixed on the first lower die plate 22 through screws, and an avoidance through hole is formed in the second lower die plate 23 corresponding to the outline of the lower female die 3 in a penetrating manner; the upper side of the second lower template 23 is also provided with a material supporting plate 24, the outline of the corresponding lower die 3 on the material supporting plate 24 is provided with a through hole in a penetrating way, a supporting spring 27 is arranged between the material supporting plate 24 and the first lower template 22, the corresponding supporting spring 27 on the second lower template 23 is provided with a spring groove 231 in a penetrating way, the center of the supporting spring 27 is provided with a lower equal-height bolt 26 to limit the height of the material supporting plate 24, and the upper end face of the material supporting plate 24 is flush with the upper end face of the lower die 3 in a non-stressed state.
The lower die 3 is a chain-shaped cylinder die with an end surface outline, a center blanking hole 31 is coaxially and penetratingly arranged in the center of the lower die 3, and a boss forming groove 32 is coaxially arranged at one end, far away from the lower die holder 2, of the lower die 3.
The upper die holder 1 comprises an upper base 11, a first upper die plate 12 arranged on the lower side of a lower base 21, a second upper die plate 13 arranged on the first upper die plate 12 and a third upper die plate 14 arranged on the second upper die plate 13, wherein the upper base 11, the first upper die plate 12, the second upper die plate 13 and the third upper die plate 14 are fixedly connected through bolts, and guide holes 15 are formed in the first upper die plate 12, the second upper die plate 13 and the third upper die plate 14 in a penetrating manner through corresponding guide columns 25.
A sprocket cutting die 4, a boss forming press block 5 and a central hole cutting die 6 are arranged on one side of the second upper die plate 13 close to the lower die 3; the sprocket cutting die 4 is fixed on the second upper die plate 13 through bolts, and the outer contour of the third upper die plate 14 corresponding to the sprocket cutting die 4 is provided with an avoidance through hole in a penetrating way; the upper end of the center hole cutting die 6 is integrally provided with a T-shaped boss 01 structure and is tightly pressed and fixed between the second upper die plate 13 and the first upper die plate 12; the boss forming press block 5 is hung on the second upper template 13 through the upper equal-height bolts 17, the heads and rod bodies of the upper equal-height bolts 17 corresponding to the first upper template 12 and the second upper template 13 respectively penetrate through and are provided with sliding holes 111, and the lower ends of the upper equal-height bolts 17 are connected to the boss forming press block 5 in a threaded mode. The center of the upper base 11 is provided with a sliding hole 111 in a penetrating way, the upper contour bolts 17 are all positioned in the range of the sliding hole 111, and the sliding hole 111 is internally provided with a pressing plate 16 in a sliding way; when the pressing plate 16 is abutted against the first upper die plate 12, the pressing plate 16 is abutted against the upper end of the upper contour bolt 17, and the upper end face of the pressing plate 16 is flush with the upper end face of the upper base 11.
The center of the sprocket cutting die 4 is provided with a gear-shaped avoidance through hole corresponding to the outer contour of the lower female die 3 in a penetrating way, and the sprocket cutting die 4 is matched with the outer contour of the lower female die 3 to cut the plate into a gear shape in a braiding way; the boss forming press block 5 slides in the avoidance through hole on the sprocket cutting die 4, the edge profile of the boss forming press block 5 is also gear-shaped, the lower end surface of the boss forming press block 5 is arranged corresponding to the concave profile of the sprocket to be processed, and the boss forming press block 5 is matched with the boss forming groove 32 on the lower female die 3 to press a boss 01 structure on the plate body; the center hole cutting die 6 is a cylindrical male die coaxially arranged at the center of the boss forming press block 5, and the center of the boss forming press block 5 is penetrated and provided with an avoidance through hole which is in sliding fit with the center hole cutting die 6.
The thickness of the raw material plate to be processed is x, and the depth of the boss forming groove 32 on the lower concave die 3 is y, namely the boss 01 high position on the chain wheel is y. Referring to fig. 4 and 5, when the boss forming press block 5 abuts against the second upper die plate 13, the positional relationship between the dies satisfies: the lower end face of the sprocket cutting die 4 is positioned below the boss forming press block 5, and the distance between the lower end face of the sprocket cutting die 4 and the lower end face of the boss forming press block 5 is one third x to two thirds x; the lower end face of the center hole cutting die 6 is positioned below the lower end face of the boss forming press block 5, and the distance between the lower end face of the center hole cutting die 6 and the lower end face of the boss forming press block 5 is larger than x; the lower end face of the center hole cutting die 6 is located below the sprocket cutting die 4, and the distance between the lower end face of the center hole cutting die 6 and the lower end face of the sprocket cutting die 4 is- (45-35). In this embodiment, the thickness x=5.2 mm of the raw material plate, the depth y=4.6 mm of the boss forming groove 32, the distance between the lower end face of the sprocket cutting die 4 and the lower end face of the boss forming press block 5 is 12=2.6 mm, the distance between the lower end face of the sprocket cutting die 4 and the lower end face of the center hole cutting die 6 is greater than-34=0.7 mm, and the distance between the lower end face of the sprocket cutting die 4 and the lower end face of the center hole cutting die 6 in this embodiment is 2mm.
Blanking process of the chain wheel:
referring to fig. 5 and 6, the upper die portion is depressed, the center hole cutting die 6 is first brought into contact with the plate material, the plate material is pressed down toward the boss forming groove 32, and then the sprocket cutting die 4 presses the edge of the plate material; the boss 01 molding bump does not abut against the second upper die plate 13.
Referring to fig. 6 and 7, the upper die portion continues to be pressed down, when the sprocket cutting die 4 is deep into the half position of the plate material, the upper end of the boss 01 forming projection abuts against the second upper die plate 13, the lower end of the boss 01 forming projection abuts against the plate material, and the boss 01 forming projection contacts the plate material to start pressing the boss 01, at which time the plate material does not contact the bottom of the boss forming groove 32.
Referring to fig. 7 and 8, the upper die portion continues to be pushed down, and when the sprocket cutting die 4 is deep into one third of the plate, the plate contacts the bottom of the boss forming groove 32, and the center hole cutting die 6 starts to punch the center hole 03.
Referring to fig. 8 and 9, the upper die is partially fully pressed, the first rough sprocket blank is cut, the boss 01 is pressed and formed, and the center hole 03 is punched.
The implementation principle of the sprocket blanking die disclosed in the embodiment of the application is as follows: by setting the relative positions of the dies, different structures are punched step by step in the punching process so as to meet the step punching requirement of the process; by suspending the boss forming press 5 with the upper contour bolt 17 and abutting with the pressing plate 16, after the press is completed, the pressing plate 16 is pressed into the sliding hole 111 due to the reset of the upper die, and the boss forming press 5 moves down, so that automatic material returning can be realized.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (9)
1. A sprocket stamping process is characterized in that: comprising the following steps:
step one, preparing a raw material, namely preparing a plate raw material;
blanking, namely punching a first chain wheel rough blank with a required chain wheel outline from a plate raw material by using a punching die, wherein chain teeth (02) are punched on the peripheral side of the first chain wheel rough blank, a central hole (03) is coaxially formed in the first chain wheel rough blank in a penetrating mode, a circular boss (01) is formed in the center of the first chain wheel rough blank in a punching and stretching mode, and the central hole (03) is formed in the boss (01);
punching a first sprocket rough blank by using a punching die to obtain a second sprocket rough blank, wherein a mounting hole (04) and a positioning hole (05) are punched in the second sprocket rough blank;
step four, semi-fine stamping, namely cutting off part of the remainder on the sprocket rough blank II by using a stamping die to obtain a sprocket rough blank III;
fifthly, finely stamping, namely cutting off the residual materials on the rough blank of the chain wheel by using a stamping die to obtain a primary finished product;
the second step comprises: s21, starting to punch the outline of the sprocket (02); s22, starting to punch the boss (01) when the sprocket (02) punches the rest two thirds to one third of the thickness; s23, when the sprocket (02) is punched out to have a thickness of two-fifths to one-fifth of the remaining thickness, the punching out of the center hole (03) is started.
2. A sprocket stamping process according to claim 1, wherein the protruding direction of the boss (01) is the same as the cutting direction of the sprocket (02).
3. A sprocket press working process according to claim 1 or 2, wherein: s22, starting to punch the boss (01) when the sprocket (02) is punched to have half of the thickness; s23, when the sprocket (02) is punched out to have the remaining quarter thickness, the central hole (03) is punched out.
4. The sprocket stamping process as set forth in claim 1, wherein: cutting off the surplus materials on the mounting holes (04) and the chain teeth (02) to obtain the mounting holes (04) with accurate size and the chain teeth (02) with a small amount of surplus materials; and fifthly, cutting off the remainder of the sprocket (02) to obtain the sprocket (02) with accurate size.
5. A sprocket press working process as set forth in claim 1 or 4, wherein: s41, starting to punch the mounting hole (04); s42, when the mounting hole (04) is punched to a thickness of one third to two thirds, the sprocket (02) is punched.
6. The utility model provides a sprocket blanking mould, includes upper die base (1) and die holder (2), its characterized in that: the sprocket stamping process is used for any one of claims 1-5, a lower female die (3) is mounted on a lower die holder (2), the lower female die (3) is a cylinder with a gear-shaped end surface outline, a central blanking hole (31) is coaxially formed in the center of the lower female die (3) in a penetrating manner, the central blanking hole (31) penetrates through the lower die holder (2), and a boss forming groove (32) is coaxially formed in the end surface, far away from the lower die holder (2), of the lower female die (3);
a sprocket cutting die (4), a boss forming press block (5) and a center Kong Caiqie die (6) are arranged on one side, close to the lower die (3), of the upper die holder (1), a gear-shaped avoidance through hole is formed in the center of the sprocket cutting die (4) corresponding to the outer contour of the lower die (3), the boss forming press block (5) is positioned in the avoidance through hole on the sprocket cutting die (4), and the center Kong Caiqie die (6) is a male die coaxially arranged on one side, close to the lower die (3), of the boss forming press block (5);
with the thickness of the raw material plate to be processed being x, the depth of a boss forming groove (32) on a lower female die (3) is y, a sprocket cutting die (4) and the lower end face of a center Kong Caiqie die (6) are both located below a boss forming pressing block (5), the distance between the lower end face of the center Kong Caiqie die (6) and the lower end face of the boss forming pressing block (5) is greater than x, the distance between the lower end face of the sprocket cutting die (4) and the lower end face of the boss forming pressing block (5) is 13 x-23 x, the lower end face of the center Kong Caiqie die (6) is located below the sprocket cutting die (4), and the distance between the lower end face of the center Kong Caiqie die (6) and the lower end face of the sprocket cutting die (4) is greater than y- (45-35) x.
7. The sprocket blanking die of claim 6, wherein: the distance between the lower end face of the sprocket cutting die (4) and the lower end face of the boss forming pressing block (5) is 12x, and the distance between the lower end face of the sprocket cutting die (4) and the lower end face of the center Kong Caiqie die (6) is larger than y-34x.
8. The sprocket blanking die of claim 6, wherein: still including installing material backup pad (24) on die holder (2), material backup pad (24) with be provided with between die holder (2) supporting spring (27), material backup pad (24) with be provided with between die holder (2) lower contour bolt (26), the upper plane of material backup pad (24) with the up end parallel and level of lower die (3).
9. The sprocket blanking die of claim 6, wherein: the boss forming press block (5) is slidably arranged in an avoidance through hole on the sprocket cutting die (4), the center of the boss forming press block (5) corresponds to the center Kong Caiqie die (6) and is provided with an avoidance through hole in a penetrating mode, the center Kong Caiqie die (6) is slidably matched with the avoidance through hole on the boss forming press block (5), the upper die holder (1) comprises an upper base (11), a first upper die plate (12) and a second upper die plate (13), the first upper die plate (12) and the second upper die plate (13) are sequentially arranged on one side, close to the boss forming press block (5), of the boss forming press block (5), an upper contour bolt (17) is fixed on one side, close to the second upper die plate (13) and hung on the second upper die plate (13), a guide through hole is formed in the penetrating mode of the head of the upper die plate (12) corresponding to the upper contour bolt (17), the upper base (11) is provided with a sliding through hole (111), and the sliding bolt (17) is provided with an inner sliding hole (111); when the pressing plate (16) abuts against the first upper die plate (12), the pressing plate (16) abuts against the head of the upper contour bolt (17), and the upper end face of the pressing plate (16) is flush with the upper end face of the upper base (11).
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| CN202111462344.0A CN114247803B (en) | 2021-12-02 | 2021-12-02 | Sprocket stamping processing technology and sprocket blanking die |
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| CN114951414B (en) * | 2022-04-19 | 2023-03-31 | 聊城市博源节能科技有限公司 | Forming method of clutch support plate and stamping and shearing equipment |
| CN116213547A (en) * | 2023-01-16 | 2023-06-06 | 武汉泛洲精冲有限公司 | Stamping process for machining parking gear |
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