CN114289536A - Cold extrusion male die for star wheel roller chamber of isolator and manufacturing method thereof - Google Patents
Cold extrusion male die for star wheel roller chamber of isolator and manufacturing method thereof Download PDFInfo
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- CN114289536A CN114289536A CN202111673107.9A CN202111673107A CN114289536A CN 114289536 A CN114289536 A CN 114289536A CN 202111673107 A CN202111673107 A CN 202111673107A CN 114289536 A CN114289536 A CN 114289536A
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- 238000000641 cold extrusion Methods 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 238000005260 corrosion Methods 0.000 claims description 6
- 230000007797 corrosion Effects 0.000 claims description 6
- 238000006056 electrooxidation reaction Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000003792 electrolyte Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 11
- 238000009434 installation Methods 0.000 abstract description 9
- 238000001125 extrusion Methods 0.000 description 10
- 230000000994 depressogenic effect Effects 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 239000007858 starting material Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/02—Dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C25/00—Profiling tools for metal extruding
- B21C25/10—Making tools by operations not covered by a single other subclass
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Abstract
The invention provides a cold extrusion male die of a star wheel roller chamber of a one-way device and a manufacturing method thereof, belonging to the technical field of stamping dies. The problem that the male die is smoothly inserted into the die on the basis of ensuring the normal installation of the roller in the roller chamber of the cold extruded isolator is solved. The male die comprises a columnar body, wherein a plurality of convex parts used for extruding a roller chamber are arranged in the circumferential direction of the body, the outer sides of the convex parts are respectively provided with a cambered surface, the end face of a die entering end is a first plane perpendicular to the axis of the body, the convex parts are positioned on the end face of one side of the die entering end and are provided with inclined die entering guide faces, and each die entering guide face is provided with a concave part. The male die of the design can leave a boss at the bottom of the inner cavity of the isolator after cold extrusion, the end face of the boss is a plane and can enable the roller placed on the boss to normally work, the roller can not fall out of the boss due to the fact that the roller rolls under the guidance of the eccentric cambered surface, and the whole male die is enabled to be very smooth in die entering on the basis of guaranteeing the normal installation work of the roller in the roller chamber.
Description
Technical Field
The invention belongs to the technical field of stamping dies, relates to a male die, and particularly relates to a cold extrusion male die of a star wheel roller chamber of a one-way device and a manufacturing method thereof.
Background
The isolator is a key part on the starting motor and comprises a shell and a starting gear arranged in the shell, wherein a plurality of rollers are arranged on the outer side of the starting gear in a surrounding mode, an eccentric arc surface is arranged on the side surface of an inner cavity of the shell at each roller, and the rollers can roll in the range where the eccentric arc surfaces are located. The working principle of the isolator is as follows: when the shell rotates forwards, the roller rolls towards one side of the eccentric cambered surface with the radius gradually reduced, and the guide roller subjected to the eccentric cambered surface gradually approaches the starting gear and finally is in close fit with the starting gear so that the shell and the starting gear rotate synchronously; when the shell rotates reversely, the roller rolls towards one side with the radius of the eccentric cambered surface gradually increased, so that a gap is generated between the roller and the starting gear, and the shell cannot drive the starting gear to rotate synchronously when rotating. When the automobile is started, the rotating speed of the engine at the brake where the starter does not stop working is higher than that of the starter, so that the starter is damaged when the engine drives the starter to rotate, and the isolator is used for playing a role of reverse slipping to protect a starting motor.
The inner cavity of the existing isolator shell is generally formed in one step by cold extrusion, and the side surface of the inner cavity is provided with an eccentric cambered surface and a protrusion for limiting a roller, so that the used male die is also manufactured according to the shape of the inner cavity of the isolator in particular, the peripheral surface of the male die can be provided with a plurality of convex parts and concave parts according to design, and when the male die is subjected to cold extrusion, the male die is very difficult to enter the die due to overlarge circumferential contact area, great resistance caused by factors such as the circumferential contact area and the like. Generally, the thrust of the punch is increased to extrude the inner cavity of the isolator hard, but the outer edge of the circumferential projection of the punch is easily worn or broken by stress.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a cold extrusion male die of a star wheel roller chamber of a isolator. The technical problem that the male die is smoothly inserted into the die on the basis of ensuring the normal installation of the roller in the roller chamber of the cold extruded isolator is solved.
The purpose of the invention can be realized by the following technical scheme:
the utility model provides an isolator star gear roller room cold extrusion terrace die, is including having the end of drawing in the patterns and drawing of patterns end and being cylindrical body, the circumference of body has a plurality of convex parts that are used for extruding the roller room, the outside of convex part all has the cambered surface, the terminal surface of end of drawing in the patterns is for the plane one with body axis looks vertically, its characterized in that, the convex part is located to have the mould spigot surface of going into on the terminal surface of mould end one side, go into the slope of mould spigot surface relative plane orientation one towards drawing of patterns end orientation, lie in cambered surface place one side on every income mould spigot surface and all be equipped with the depressed part, the bottom surface of depressed part is two planes and plane one and plane two are parallel to each other.
The end face of each convex part of the design is provided with a die-entering guide surface, the die-entering guide surfaces which are protruded on each convex part on the periphery of the body when entering the die are respectively the die-entering guide surfaces which are directly in rigid contact with the shell of the one-way valve and inclined from inside to outside, so that the convex parts can be guided to move forward, the resistance of the convex parts can be greatly reduced, the resistance of the whole male die is reduced, and the male die can move forward very smoothly.
The cambered surface on the convex part is used for extruding the eccentric cambered surface in the roller chamber, and the roller arranged in the roller chamber at the eccentric cambered surface can roll along the eccentric cambered surface and can not be separated from the eccentric cambered surface. Set up into mould spigot surface on the terminal surface of convex part, it is unfavorable for the installation of roller that the inclined plane leaves the inclined plane at the roller room bottom of isolator after the extrusion to go into the mould spigot surface, so this design sets up the depressed part in the inboard department of the cambered surface on income mould spigot surface, the bottom surface of depressed part is the plane, can leave the boss in the inner chamber bottom of isolator after cold extrusion like this, the boss correspond lie in eccentric cambered surface department we only need place the roller on the boss can, the terminal surface of boss can let the roller normally work for the plane, the roller can not fall out outside the boss owing to receive eccentric cambered surface direction roll, on the normal installation work's of roller in having guaranteed the roller room basis, make whole terrace die go into the mould very smoothly.
In foretell isolator star gear roller room cold extrusion terrace die, every convex part all includes eccentric arc portion and spacing portion, the cambered surface is the lateral surface of eccentric arc portion, the lateral surface of spacing portion has inside sunken cambered surface with the crossing department of cambered surface, the depressed part is seted up on the tip of eccentric arc portion.
The cambered surface is the outer side surface of the eccentric arc part, the eccentric arc part forms a roller chamber used in roller movement on the isolator shell, the limiting part forms a protrusion on one side of the roller chamber to limit the roller to roll out of the roller chamber, the concave part keeps the bottom surface of the extruded roller chamber flat, and the end surface of the limiting part is an inclined die-entering guide surface, so that the male die can enter the die more smoothly on the basis of ensuring the normal installation of the roller in the extruded roller chamber.
In foretell isolator star gear roller room cold extrusion terrace die, the body can divide into drawing of patterns section and working section along its length direction, the radial cross sectional area that the body is located on the drawing of patterns section is by being close to working section one side to deviating from working section one side and diminishing gradually and the body is located drawing of patterns section everywhere radial cross sectional shape homogeneous phase is the same, income mould spigot surface and depressed part all are located the body of working section.
The body can divide into drawing of patterns section and working section on its length direction, the shape homogeneous phase and the drawing of patterns section by being close to working section one side to the radial cross sectional area who deviates from working section one side dwindles gradually along its length direction ascending radial cross section's everywhere on the body of drawing of patterns section, the drawing of patterns section is equivalent to by being close to working section one side to the opposite side equal proportion dwindles gradually, the body is working section and one-way case body contact extrusion when using, drawing of patterns section equal proportion dwindles can let the outer peripheral face of terrace die can diminish with the area of contact of the inner chamber wall of one-way case body when the extrusion, area of contact diminishes then frictional force also can diminish, make when going into the mould more smooth and easy. And after the inner cavity of the isolator is extruded and molded, a certain gap is formed between the outline surface of the demolding section and the wall of the inner cavity of the isolator, so that demolding of the male die is facilitated, and demolding of the male die is very smooth.
In the cold extrusion male die of the star wheel roller chamber of the isolator, the length of the demoulding section is far longer than that of the working section.
The inner cavity of the shell of the isolator is extruded by the working section when the male die enters the die actually, the demolding section does not participate in extrusion, and the length of the working section is far smaller than that of the demolding section, so that the working section and the shell of the isolator are in less contact, the resistance is smaller, and the male die enters the die more smoothly.
In the star wheel roller chamber cold extrusion male die for the isolator, all the die-entering guide surfaces are arranged around the central line of the body.
All the die-entering guide surfaces on the convex parts are arranged in an outward inclined mode by taking the axis of the body as the center, and all the die-entering guide surfaces are combined to look like an annular inclined surface. The end part of the male die is made to have a certain taper, so that the resistance of the end part of the male die, which is relative to the end surface of the plane, is greatly reduced when the male die advances, and the male die can be smoothly inserted.
In the star wheel roller chamber cold extrusion male die for the isolator, the end face of the working section is provided with an annular inclined surface along the circumferential direction of the working section, and each die-entering guide surface is flush with the inclined surface.
The annular inclined plane on the end face of the working section also plays a role in guiding when entering the die, so that resistance can be effectively reduced, the die entering guide surface on the convex part is connected with the inclined plane and flushed, and the complete guide surface is formed by combination so that resistance received by the upper working section when entering the die is greatly reduced, and the die entering of the male die is very smooth.
A manufacturing method of a cold extrusion male die of a star wheel roller chamber of a one-way device is characterized by comprising the following steps:
step one, preparing a blank male die: firstly, turning the periphery of a blank, and then carrying out heat treatment on the blank to obtain a blank male die;
step two, finish turning: turning the outer edge of the end face of the blank male die by using a lathe to form an annular guide surface;
step three, wire cutting: the method comprises the following steps that a wire cutting machine is used for carrying out slow-speed wire cutting on a blank male die, convex parts are formed on the periphery of the blank male die through wire cutting, concave parts are formed on the end parts of the convex parts through wire cutting, cambered surfaces are formed on the outer side surfaces of the convex parts through wire cutting, and guide surfaces are formed at the convex parts through wire cutting to form die-entering guide surfaces;
fourthly, electrochemical corrosion: putting a blank male die into electrolyte, sleeving an annular electrode plate at one end of the blank male die, carrying out electrolytic corrosion on one end of the blank male die positioned on the inner side of the electrode plate to obtain a demoulding section with a gradually reduced sectional area, and forming a working section at one end of the blank male die positioned outside the electrode plate;
step five, polishing: and polishing the blank male die to obtain a finished product male die.
The processing of the income mould spigot surface of this design needs to follow its circumference on the terminal surface of blank terrace die now and surely go out whole annular spigot surface, then directly cuts apart into the income mould spigot surface one by one with the spigot surface when cutting out the convex part on line, and such processing is very convenient makes this terrace die very smooth and easy of moulding in the time of cold extrusion isolator casing. The inclined surface on the end face of the male die is actually a part with a smaller inner diameter of the guide surface, and can provide a good guide effect during extrusion, so that the male die can enter the die very smoothly.
The demoulding section is processed through electrochemical corrosion, put into electrolyte with whole blank terrace die, overlap annular electrode slice on the tip of blank terrace die, the electrode slice circular telegram then can have the one end of electrode slice to blank terrace die cover, and the part that the blank terrace die exposes outside the electrode slice then can not participate in electrolytic corrosion and remain original size and form the working section, the working section diameter will be greater than the diameter of demoulding section, the working section is direct when the income mould extrudes its inner chamber with the one-way clutch housing, design effectual reduction terrace die and the contact area between the one-way clutch housing like this and make the income mould more smooth and easy, and the demoulding section that the equal proportion reduces makes this terrace die can very convenient taking off when the drawing of patterns.
In the manufacturing method of the cold extrusion male die of the star wheel roller chamber of the isolator, the minimum diameter of the guide surface in the second step is the diameter of the starting gear in the isolator plus 1.5 times of the diameter of the roller, and the maximum diameter of the guide surface is the maximum diameter of the blank male die.
In the manufacturing method of the cold extrusion male die of the star wheel roller chamber of the isolator, the length of the working section in the fifth step is 2mm-2.5 mm.
In the manufacturing method of the cold extrusion male die of the star wheel roller chamber of the isolator, the cross section of the electrode plate in the fifth step is the same as that of the blank male die after linear cutting, the cross section of the electrode plate is gradually reduced from one end to the other end in an equal proportion, and the blank male die extends into the electrode plate from the end with the larger opening.
Compared with the prior art, the product has the advantages that:
1. the end face of each convex part of the design is provided with a die-entering guide surface, and the die-entering guide surfaces which are protruded on each convex part on the periphery of the body when entering the die are inclined die-entering guide surfaces which are in direct rigid contact with the shell of the one-way valve, so that the resistance of the convex parts when entering the die is greatly reduced, the resistance of the whole male die is reduced, and the male die enters the die very smoothly.
2. When the male die enters the die, the inner cavity of the shell of the isolator is extruded by the working section, and the demoulding section does not participate in extrusion, so that the length of the working section is far smaller than that of the demoulding section, the working section is in less contact with the shell of the isolator, the resistance is smaller, and the male die can enter the die more smoothly.
3. The inner side of the cambered surface on the die entering guide surface is provided with the sunken part, the bottom surface of the sunken part is a plane, a boss can be left at the bottom of the inner cavity of the isolator after the male die is used for cold extrusion, the roller can normally work due to the fact that the roller is placed on the boss through the plane, the roller can not fall out of the boss due to the fact that the roller rolls under the guide of the cambered surface in the roller chamber, and the male die entering guide surface is very smooth on the basis of guaranteeing normal installation work of the roller in the roller chamber.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a schematic view of the invention in half section in the direction A-A of FIG. 2;
fig. 4 is a half sectional view of the present invention in the direction B-B of fig. 2.
In the figure, 1, a body; 11. a working section; 12. a demolding section; 13. a first plane; 14. an inclined surface; 15. a mould entering end; 16. a demoulding end; 17. a central bore; 2. a convex portion; 21. an eccentric arc portion; 211. a cambered surface; 22. a limiting part; 23. a die-entering guide surface; 24. a recessed portion; 241. a second plane; 25. and (4) cambered surface.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
The cold extrusion male die for the star wheel roller chamber of the isolator as shown in the figures 1-4 comprises a columnar body 1, wherein the center position of the body 1 is provided with a central hole 17 for fixing with a bearing, the circumferential direction of the body 1 is provided with six convex parts 2 which are uniformly distributed and used for extruding the roller chamber, so that the appearance of the whole body 1 looks like a six-flower shape, the outer sides of the convex parts 2 are provided with cambered surfaces 211, the end surface of the body 1 is a plane I13 which is vertical to the axis of the body 1, the end surface of a die entering end 15 of the body 1 at each convex part 2 is provided with an inclined die entering guide surface 23, and the die entering guide surfaces 23 incline towards a die releasing end 16 from one side close to the center line of the body to the outer side. Each die entering guide surface 23 is provided with a concave part 24 at one side of the cambered surface 211, the bottom surface of the concave part 24 is a plane two 241, and the plane one 13 is parallel to the plane two 241. The end face of each convex part 2 of the design is provided with a die entering guide surface 23, and the die entering guide surfaces 23 of each convex part 2 which are protruded on the periphery of the body 1 when entering the die are inclined die entering guide surfaces 23 which are directly in rigid contact with the shell of the one-way valve, so that the resistance of the convex parts 2 when entering the die is greatly reduced, the resistance of the whole male die is reduced, and the male die enters the die very smoothly. The end face of the convex part 2 is provided with a die entering guide surface 23, the die entering guide surface 23 is formed by an inclined surface 14 which is extruded and then an inclined surface is left at the bottom of a roller chamber of the isolator to be unfavorable for the installation of a roller, so the design is that the concave part 24 is arranged at the inner side of the cambered surface 211 on the die entering guide surface 23, the bottom surface of the concave part 24 is a plane, a boss can be left at the bottom of an inner cavity of the isolator after cold extrusion, only the roller needs to be placed on the boss, the end face of the boss can enable the roller to normally work as the plane, the cambered surface 211 can also form the cambered surface 211 with the same radian in the inner cavity of the isolator, the roller is guided by the cambered surface 211 to roll and can not fall out of the boss, and the normal installation work of the roller in the roller chamber is guaranteed, so that the whole male die entering is very smooth. All the die-entering guide surfaces 23 of the convex parts 2 are arranged obliquely outwards by taking the axis of the body 1 as the center, and all the die-entering guide surfaces 23 are combined to look like an annular inclined surface 14. The end part of the male die is made to have a certain taper, so that the resistance of the end part of the male die, which is relative to the end surface of the plane, is greatly reduced when the male die advances, and the male die can be smoothly inserted.
The body 1 can be divided into a working section 11 and a demoulding section 12 along the length direction, the die entering guide surface 23 and the concave part 24 are both positioned on the convex part 2 on the working section 11, the peripheral diameter of the convex part 2 on the working section 11 is kept unchanged, and the cross section of the demoulding section 12 along the length direction is the same in shape but the size of the cross section is reduced in an equal proportion from the part close to the working section 11 to the part far from the working section 11. The body 1 is that the working section 11 extrudees with the isolator casing direct contact when using, and drawing of patterns section 12 equal proportional reduction can let the area of contact that the outer peripheral face of terrace die can and the inner chamber wall of isolator casing diminish when the extrusion, and area of contact diminishes then frictional force also can diminish for it is more smooth and easy when going into the mould. And a certain gap is formed between the outer side surface of the demoulding section 12 and the inner cavity wall of the isolator after the isolator is extruded and formed, so that demoulding of the male die is facilitated, and demoulding of the male die is very smooth. The length of the stripping section 12 is much greater than the length of the working section 11. The length of the working section 11 is 2mm-2.5mm, the working section 11 is equivalent to the function of a working belt, the working section 11 is used for extruding the inner cavity of the shell of the isolator when the male die is inserted into the die actually, the demolding section 12 does not participate in extrusion, and thus the length of the working section 11 is far smaller than that of the demolding section 12, so that the working section 11 and the shell of the isolator are in less contact, the received resistance is smaller, and the male die is inserted more smoothly. The end face of the working section 11 is provided with annular inclined faces 14 along the circumferential direction thereof, and each die-entering guide face 23 is flush with the inclined face 14. The annular inclined plane 14 on the end face of the working section 11 also plays a role in guiding when entering the die, so that the resistance can be effectively reduced, the die entering guide surface 23 on the convex part 2 is connected with the inclined plane 14 and is flush with the inclined plane, and the complete guide surface is formed by combination in such a way, so that the resistance of the working section 11 when entering the die can be greatly reduced, and the die entering of the male die can be very smooth. Every convex part 2 all includes that two parts are constituteed respectively for eccentric arc 21 and spacing portion 22 about, cambered surface 211 is the lateral surface of eccentric arc 21, and eccentric arc 21 mainly can extrude the roller room, and the side of roller room is the same with cambered surface 211, and spacing portion 22 then can extrude the restriction roller and roll out the outer lateral surface of the spacing portion 22 of protrusion outside the roller room and cambered surface 211 crossing department and have inside sunken cambered surface 25, and depressed part 24 is seted up on the tip of eccentric arc 21. The concave part 24 is only arranged on the eccentric arc part 21 to keep the bottom surface of the extruded roller chamber flat, and the end surface of the limiting part 22 is an inclined die-entering guide surface 23 to make the male die enter the die more smoothly.
The male die of the design can be produced and processed by the following method: step one, preparing a blank male die: firstly, turning the periphery of a blank, and then carrying out heat treatment on the blank to obtain a blank male die; step two, finish turning: turning the outer edge of the end face of the blank male die by using a lathe to form an annular guide surface, wherein the inclination angle of the guide surface is almost 4 degrees; step three, wire cutting: the method comprises the following steps of performing slow-speed wire cutting on a blank male die by using a wire cutting machine, forming convex parts 2 on the periphery of the blank male die by wire cutting, forming a concave part 24 on the end part of each convex part 2 by wire cutting, forming a cambered surface 211 on the outer side surface of each convex part 2 by wire cutting, and forming a die-entering guide surface 23 on each convex part 2 by wire cutting of a guide surface; fourthly, electrochemical corrosion: putting a blank punch into electrolyte, sleeving an annular electrode plate at one end of the blank punch, carrying out electrolytic corrosion on one end of the blank punch positioned on the inner side of the electrode plate to obtain a demoulding section 12 with a gradually reduced sectional area, and forming a working section 11 at one end of the blank punch positioned outside the electrode plate; fifthly, heat treatment: and carrying out heat treatment on the blank male die to obtain a finished male die. The processing of the income mould spigot surface 23 of this design needs to cut out whole annular spigot surface along its circumference on the terminal surface of blank terrace die now, then directly cuts apart into the income mould spigot surface 23 of one by one with the spigot surface when cutting out convex part 2 on line, and such processing is very convenient makes this terrace die very smooth and easy of moulding in the time of cold extrusion isolator casing. The inclined surface 14 on the end surface of the male die is actually a part with a smaller inner diameter of the guide surface, and can provide good guide function during extrusion, so that the male die can be smoothly inserted into the die. The demoulding section 12 is processed by electrochemical corrosion, the whole blank male die is placed into electrolyte, an annular electrode plate is sleeved at one end of the blank male die, the electrode plate is electrified to carry out electrolytic corrosion on the end, sleeved with the electrode plate, of the blank male die, the part, exposed outside the electrode plate, of the blank male die can not participate in the electrolytic corrosion to keep an original size to form a working section 11, the diameter of the working section 11 is far smaller than that of the demoulding section 12, the working section 11 is directly extruded with the one-way case to form an inner cavity in an extrusion mode when the blank male die enters the die, the contact area between the male die and the one-way case is effectively reduced, so that the die entering is smoother, and the demoulding section 12 reduced in equal proportion enables the male die to be conveniently taken down when the die is demoulded. The minimum diameter of the guide surface in the second step is the diameter of the starting gear in the one-way device plus 1.5 times of the diameter of the roller, and the maximum diameter of the guide surface is the maximum diameter of the blank male die. And the cross section of the electrode plate used in the fifth step is also in a six-flower shape, the minimum inner diameter of the electrode plate is slightly larger than the maximum outer diameter of the blank male die, the electrode plate is gradually reduced, the cross section area of the electrode plate is gradually reduced in an equal proportion from one end to the other end, the blank male die extends into the electrode plate from the larger end of the opening of the electrode plate, and one end of the blank male die has a demoulding angle of 7 degrees after electrochemical corrosion.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. A cold extrusion male die of a star wheel roller chamber of a isolator comprises a columnar body (1) with a die inlet end (15) and a die release end (16), the periphery of the body (1) is provided with a plurality of convex parts (2) for extruding a roller chamber, the outer sides of the convex parts (2) are provided with cambered surfaces (211), the end surface of the die-in end (15) is a first plane (13) vertical to the axis of the body (1), it is characterized in that the end surface of the convex part (2) at one side of the die-in end (15) is provided with a die-in guide surface (23), the die-entering guide surfaces (23) are inclined towards the direction of the demoulding end (16) relative to the first plane (13), a concave part (24) is arranged on one side of each die-entering guide surface (23) where the cambered surface (211) is located, the bottom surface of the concave part (24) is a plane II (241), and the plane I (13) and the plane II (241) are parallel to each other.
2. The cold extrusion male die of the star wheel roller chamber of the isolator is characterized in that the convex parts (2) comprise eccentric arc parts (21) and limiting parts (22), the arc surfaces (211) are the outer side surfaces of the eccentric arc parts (21), the intersection parts of the outer side surfaces of the limiting parts (22) and the arc surfaces (211) are provided with inwards concave arc surfaces (25), and the concave parts (24) are located at the ends of the eccentric arc parts (21).
3. A cold extrusion punch of a star wheel roller chamber of an isolator as claimed in claim 2, characterized in that the body (1) is divided into a stripping section (12) and a working section (11) along the length direction thereof, the radial cross-sectional area of the body (1) on the stripping section (12) is gradually reduced from the side close to the working section (11) to the side away from the working section (11), the radial cross-sections of the body (1) on the stripping section (12) are the same, and the die-entering guide surface (23) and the recess (24) are both located on the body (1) of the working section (11).
4. A cold extrusion punch for a roller chamber of a star wheel of a one-way clutch according to claim 3, characterized in that the length of said stripping section (12) is much greater than the length of said working section (11).
5. A cold extrusion punch for a star wheel roller chamber of an isolator as claimed in claim 4, characterised in that all the die-entering guide surfaces (23) are arranged around the centre line of the body (1).
6. A cold extrusion punch according to claim 3, 4 or 5, characterised in that the end face of the working segment (11) is provided with an annular inclined surface (14) along its circumference, and each die-entering guide surface (23) is flush with the inclined surface (14).
7. A manufacturing method of a cold extrusion male die of a star wheel roller chamber of a one-way device is characterized by comprising the following steps:
step one, preparing a blank male die: firstly, turning the periphery of a blank, and then carrying out heat treatment on the blank to obtain a blank male die;
step two, finish turning: turning the outer edge of the end face of the blank male die by using a lathe to form an annular guide surface;
step three, wire cutting: the method comprises the following steps that a wire cutting machine is used for carrying out slow-speed wire cutting on a blank male die, convex parts (2) are formed on the periphery of the blank male die through wire cutting, concave parts (24) are formed on the end parts of the convex parts (2) through wire cutting, cambered surfaces (211) are formed on the outer side surfaces of the convex parts (2) through wire cutting, and guide surfaces are formed at the positions of the convex parts (2) through wire cutting to form die-entering guide surfaces (23);
fourthly, electrochemical corrosion: putting a blank punch into electrolyte, sleeving an annular electrode plate at one end of the blank punch, carrying out electrolytic corrosion on one end of the blank punch positioned on the inner side of the electrode plate to obtain a demoulding section (12) with a gradually reduced sectional area, and forming a working section (11) at one end of the blank punch positioned outside the electrode plate;
step five, polishing: and polishing the blank male die to obtain a finished product male die.
8. The method for manufacturing the cold extrusion punch of the star wheel roller chamber of the isolator as claimed in claim 7, wherein the minimum diameter of the guide surface in the second step is +1.5 times the diameter of the roller of the starting gear in the isolator, and the maximum diameter of the guide surface is the maximum diameter of the blank punch.
9. A method for manufacturing a cold extrusion punch for a star wheel roller chamber of an isolator as claimed in claim 8, characterized in that the length of the working segment (11) in the fifth step is 2mm-2.5 mm.
10. The manufacturing method of the cold extrusion punch of the star wheel roller chamber of the isolator as claimed in claim 9, wherein the cross-sectional shape of the electrode sheet in the fifth step is the same as that of the blank punch after the wire cutting, the cross-sectional area of the electrode sheet is gradually reduced from one end to the other end in an equal proportion, and the blank punch is inserted from the end with the larger opening of the electrode sheet.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111673107.9A CN114289536A (en) | 2021-12-31 | 2021-12-31 | Cold extrusion male die for star wheel roller chamber of isolator and manufacturing method thereof |
| PCT/CN2022/094598 WO2023123833A1 (en) | 2021-12-31 | 2022-05-24 | Starter drive star wheel roller chamber cold extrusion male mold and manufacturing method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111673107.9A CN114289536A (en) | 2021-12-31 | 2021-12-31 | Cold extrusion male die for star wheel roller chamber of isolator and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114289536A true CN114289536A (en) | 2022-04-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111673107.9A Pending CN114289536A (en) | 2021-12-31 | 2021-12-31 | Cold extrusion male die for star wheel roller chamber of isolator and manufacturing method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN114289536A (en) |
| WO (1) | WO2023123833A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023123833A1 (en) * | 2021-12-31 | 2023-07-06 | 玉环普天单向器有限公司 | Starter drive star wheel roller chamber cold extrusion male mold and manufacturing method therefor |
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- 2021-12-31 CN CN202111673107.9A patent/CN114289536A/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2023123833A1 (en) | 2023-07-06 |
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