CN112024674B - Clutch hub double-roller composite die - Google Patents
Clutch hub double-roller composite die Download PDFInfo
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- CN112024674B CN112024674B CN202010995402.5A CN202010995402A CN112024674B CN 112024674 B CN112024674 B CN 112024674B CN 202010995402 A CN202010995402 A CN 202010995402A CN 112024674 B CN112024674 B CN 112024674B
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- 239000002131 composite material Substances 0.000 title claims abstract description 20
- 230000000712 assembly Effects 0.000 claims abstract description 32
- 238000000429 assembly Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 28
- 230000002093 peripheral effect Effects 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 73
- 239000010959 steel Substances 0.000 claims description 73
- 230000009977 dual effect Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 230000003044 adaptive effect Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000033001 locomotion Effects 0.000 description 5
- 238000005096 rolling process Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000003698 laser cutting Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000006467 substitution reaction 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
- B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
- B21D17/04—Forming single grooves in sheet metal or tubular or hollow articles by rolling
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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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- 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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
- B21D37/12—Particular guiding equipment, e.g. pliers; Special arrangements for interconnection or cooperation of dies
-
- 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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- 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
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
The invention provides a clutch hub double-roller composite die which is used for a tooth-shaped forming process of a tooth-shaped clutch hub; forming a plurality of adaptive tooth-shaped forming grooves on the peripheral wall of the workpiece supporting table on the lower die holder according to the positions of the tooth-shaped grooves of the inner hub piece; the upper die holder, the upper die cushion plate and the fixed plate are fixedly connected, the roller assemblies are fixedly clamped between the upper die cushion plate and the fixed plate through a pair of roller clamping plates, an upper roller and a lower roller which are arranged between the pair of roller clamping plates at intervals are suspended below the fixed plate, a workpiece to be processed is sleeved on a workpiece supporting table during die assembly, a plurality of groups of roller assemblies depend on the lower roller and the upper roller to sequentially descend along the outer peripheral surface of the workpiece and roll on the forming position of the tooth-shaped groove, and the roller assemblies are matched with each tooth-shaped forming groove of the lower die to complete tooth-shaped forming; a pair of guide sleeve assemblies of the upper die holder are matched with a pair of guide posts of the lower die holder to provide guiding and supporting for die assembly. The invention simplifies the forming process, reduces the cost and ensures the processing precision.
Description
Technical Field
The invention relates to the field of dies, in particular to a clutch hub double-roller composite die.
Background
With the increase of the number of domestic automobiles, traffic jam becomes more and more serious, the driving experience of manual transmission automobile types is poor due to the complex traffic environment, and the automatic transmission requirements are improved year by year. In the existing automatic transmission, a toothed clutch hub is used for transmitting power (mainly a hydrodynamic automatic transmission and a dual clutch automatic transmission) in order to save space and reduce weight, and the automatic transmission is complex in shape, precise in size and one of the most difficult parts in manufacturing the transmission.
The early clutch is mainly formed by casting, cutting and other traditional machining modes, so that the material utilization rate is low, the machining time is long, and the overall manufacturing cost is high. With the development of automobiles towards light weight, high strength and low cost, various large automobile companies at home and abroad in recent years try to manufacture clutch hubs in a metal plate volume forming mode so as to improve the material utilization rate, shorten the production time and reduce the production cost. The forming process is mainly divided into four parts:
The first step is blanking, the size of a blank is determined according to the size of a final part, the blank is generally a round blank, the blanking process mainly comprises stamping or laser cutting, the process is simpler, and the blanking process is the most commonly used process in plate processing;
The second step is drawing, the drawing process is to determine whether edge pressing is needed according to the drawing ratio, the edge pressing force can be obtained through computer simulation or an empirical formula, and the proper edge pressing force is an important factor for ensuring drawing quality;
the third step is tooth-shaped forming, the procedure is tooth-shaped clutch hub forming technology, the proper tooth-shaped forming technology can improve the precision of the part, improve the strength and reduce the subsequent shaping process;
The fourth step is the precise shaping of the tooth form, and the procedure ensures the final shaping dimensional precision of the tooth form clutch hub and meets the product performance requirement;
And fifthly, punching, namely, distributing kidney-shaped through holes on the tooth shape, and generally processing through special punching equipment or punching through laser cutting.
The processing technology of the tooth-shaped clutch hub is more, especially the tooth-shaped forming technology commonly used at present comprises rolling, spinning, stamping and the like, a special die and special equipment are often required to be designed, and the manufacturing cost is high, so that the selection of a proper processing technology for tooth-shaped forming is a key for ensuring the high-quality and low-cost clutch hub.
Disclosure of Invention
The present invention aims to solve the above technical problems at least to some extent. Therefore, the invention provides a double-roller composite die for the clutch hub aiming at the third-step tooth-shaped forming process in the tooth-shaped clutch hub forming process, replaces the traditional two procedures of tooth-shaped forming and tooth-shaped precise shaping, simplifies the forming procedure, reduces equipment investment and secondary processing positioning errors, and is beneficial to guaranteeing precision.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the utility model provides a clutch hub double roller composite mold for processing tooth form clutch hub, tooth form clutch hub is formed with a plurality of tooth grooves that are circumference interval equipartition around the axis in the lateral wall, tooth form groove is radial indent, link up along the axial, characterized by:
the double-roller composite die is used for a tooth-shaped forming process of the clutch hub, a workpiece to be processed is a tooth-shaped clutch hub inner hub opening hollow piece formed after blanking and deep drawing processes, and the double-roller composite die consists of a lower die and an upper die;
The lower die comprises a lower die seat, a workpiece supporting table arranged on the upper end surface of the lower die seat and a pair of guide posts respectively arranged on the diagonal position of the upper end surface of the lower die seat, wherein the external dimension of the workpiece supporting table is adapted to the external dimension of an inner cavity of a workpiece to be processed, a plurality of tooth-shaped forming grooves which are concave in the radial direction and are adapted to the external dimension of each tooth-shaped groove are formed on the peripheral wall in a one-to-one correspondence manner according to the forming positions of each tooth-shaped groove of the workpiece to be processed, the workpiece to be processed can be sleeved on the workpiece supporting table with an opening facing downwards, and the pair of guide posts are vertically arranged on the periphery of the workpiece supporting table;
The upper die comprises an upper die seat, an upper die base plate, a fixed plate, a plurality of groups of roller assemblies and a pair of vertically arranged guide sleeve assemblies; the upper die holder, the upper die cushion plate and the fixed plate are sequentially stacked from top to bottom and are fixedly connected; the upper rollers and the lower rollers are arranged between the pair of roller clamping plates at intervals up and down and can respectively rotate around the central axis of the corresponding wheel body, the upper rollers and the lower rollers are suspended below the fixed plate, a plurality of groups of roller assemblies are correspondingly distributed along the circumferential direction according to the positions of tooth-shaped forming grooves on a lower die workpiece supporting table, and the roller assemblies can roll on tooth-shaped groove forming positions from top to bottom in sequence according to the outer circumferential surfaces of the lower rollers and the upper rollers on the outer sides of a workpiece to be processed when the upper die is closed, and are matched with tooth-shaped forming grooves on the corresponding positions of a lower die workpiece supporting table to form tooth-shaped grooves on the workpiece to be processed, wherein the radius of the upper rollers is larger than that of the lower rollers and is used for forming the finished product size of the tooth-shaped grooves; the guide sleeve assemblies are vertically opposite to the guide posts and are respectively arranged at the diagonal positions of the lower end face of the upper die base, the ball guide sleeves of the guide sleeve assemblies are fixedly arranged on the lower end face of the upper die, the lower end of each guide sleeve assembly is provided with an opening, the inner cavity is sleeved with a steel ball sleeve with a plurality of movable steel balls embedded in a peripheral wall and vertically penetrating, the lower end parts of the steel ball sleeves are exposed out of the ball guide sleeves, the top ends of the steel ball sleeves are vertically kept at intervals with the top wall of the inner cavity of the ball guide sleeve, the outline dimension of the inner cavity is adapted to the guide posts, the guide sleeve assemblies are matched with the guide posts to form a guiding and supporting structure when the upper die and the lower die are matched, the guide posts are inserted into the steel ball sleeves, the steel ball sleeves are pushed to move upwards by virtue of friction force between the steel balls and the outer walls of the guide posts and the side walls of the inner cavity of the ball guide sleeves, and gaps are reserved between the top ends of the steel ball sleeves and the top wall of the inner cavity of the ball guide sleeve when die matching is completed, and the space is vertically reserved between the whole upper die and a workpiece to be processed.
The invention is also characterized in that:
the radius of the upper roller is 0.1mm larger than that of the lower roller.
The peripheral wall of the steel ball sleeve is provided with a plurality of steel ball hole groups which are axially arranged, the steel ball hole groups are circumferentially and uniformly distributed at intervals, each steel ball hole group consists of a plurality of steel ball holes which are axially and uniformly distributed at intervals, the steel balls are embedded in each steel ball hole, the outer sides of the steel balls are exposed and contacted with the side wall of the inner cavity of the steel ball guide sleeve, the inner sides of the steel balls are exposed in the inner cavity of the steel ball sleeve, and the steel ball hole groups can be tightly contacted with the outer wall of a guide post inserted into the inner cavity of the steel ball sleeve during die assembly.
When the die assembly is completed, the clearance value reserved between the top end of the steel ball sleeve and the top wall of the inner cavity of the ball guide sleeve is smaller than the vertical clearance value reserved between the whole upper die and the workpiece to be processed.
The structure of the roller assembly is as follows:
The gap between the pair of roller clamping plates is right opposite to the thickness of the roller body, the upper roller and the lower roller are assembled between the pair of roller clamping plates in the same structural form at intervals up and down, and are coaxially sleeved on the corresponding roller shafts, supported in the shaft holes of the pair of roller clamping plates by the bearing bushes at the two shaft ends of the roller shafts, and can rotate between the pair of roller clamping plates around the central axis of the roller shafts under the action of external force, the roller clamping plates are of L-shaped structures, and the short plate sections of the pair of roller clamping plates are upwards and reversely arranged to jointly form the mounting end parts assembled with the upper die cushion plates.
The upper die base plate is of a circular plate-shaped structure, the fixing plates are of an annular plate-shaped structure, are coaxially stacked and assembled on the lower end face of the upper die base, are fastened with the upper die base through bolts, are respectively provided with corresponding bolt holes, and are positioned by means of positioning pins during assembly, and are respectively provided with corresponding positioning holes at the positioning pin positions;
rectangular grooves are formed in the upper die base plate at the positions where the upper die base plate and the roller assemblies are assembled, mounting holes are formed in the fixing plate, the upper ends of a pair of roller clamping plates of the roller assemblies are embedded in the rectangular grooves in a matched mode, and plate bodies penetrate through the mounting holes and respectively abut against the wall of the side hole where the plate bodies are located, so that the upper rollers and the lower rollers are suspended below the fixing plate.
The mounting hole is of a convex structure, the small end faces outwards along the radial direction of the fixing plate, the large end faces inwards along the radial direction and forms an opening along the inner edge of the fixing plate, the width of the large end hole is adapted to the width of the whole outline of a pair of roller clamping plates of the roller assembly, the width of the small end hole is adapted to the thickness of the roller, a single roller can be accommodated to pass through the small end hole, and the pair of roller clamping plates are respectively abutted to the hole walls on two sides of the large end of the mounting hole.
Compared with the prior art, the invention has the beneficial effects that:
The invention utilizes the cooperation of the upper roller and the lower roller of the upper die roller assembly and the tooth-shaped forming grooves on the workpiece supporting table of the lower die to respectively act on the outer side and the inner side of each tooth-shaped groove forming position of the workpiece to be processed in die assembly to finish tooth-shaped forming procedures. The die disclosed by the invention has the advantages of long service life, high production efficiency, high product reliability and simple installation and debugging of the roller, can complete the processing of the inner hub piece of the toothed clutch hub, and can be widely applied to the traditional outer hub piece processing technology.
Drawings
FIG. 1 is a schematic view of the structure of a workpiece to be machined;
FIG. 2 is a schematic view of the structure of a workpiece obtained after the tooth form forming process is completed by the present die;
FIG. 3 is an exploded view of the upper mold;
FIG. 4 is a schematic view of the structure of FIG. 3 from another perspective;
FIG. 5 is an exploded view of the scroll wheel assembly (only the lower scroll wheel is shown);
FIG. 6 is an exploded view of the guide sleeve assembly;
FIG. 7 is a schematic view of the structure of a die pad;
FIG. 8 is a schematic structural view of a fixing plate;
Fig. 9 is an exploded view of the lower die;
FIG. 10 is a schematic view of the structure of a workpiece to be processed placed on a lower die workpiece support table;
fig. 11 is a schematic view of the structure of the mold of the present invention when the mold is closed.
In the figure, 1a lower die holder; 2, a workpiece supporting table; 3 tooth-shaped forming grooves; 4, a guide post; 5, upper die holder; 6, upper die backing plate; 7 rectangular grooves; 8, fixing a plate; 9 mounting holes; 10 bolts; 11 bolt holes; 12 cylindrical pins; 13 diamond pins; 14 positioning holes; 15 roller assemblies; 16 roller clamping plates; 17 shaft holes; 18, a roller; 19 lower rollers; 20 roller shafts; a flange bearing bush 21; 22 ball guide sleeves; 23 steel ball sleeves; 24 steel balls; 25 a workpiece to be processed; 26 tooth grooves.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 11, the double roller composite mold for clutch hub of the present embodiment is used for processing a tooth-shaped clutch hub, wherein a plurality of tooth-shaped grooves 26 are formed on the side wall of the tooth-shaped clutch hub, and the tooth-shaped grooves 26 are circumferentially and alternately distributed around a central axis, and the tooth-shaped grooves 26 are radially concave inwards and axially through, and are characterized in that:
the double-roller composite die is used for the tooth-shaped forming process of the clutch hub, the workpiece 25 to be processed is a tooth-shaped clutch hub inner hub opening hollow piece (shown in figure 1) formed after the blanking and deep drawing processes, and the workpiece is formed by a lower die and an upper die;
The lower die comprises a lower die holder 1, a workpiece supporting table 2 arranged on the upper end surface of the lower die holder 1 and a pair of guide posts 4 respectively arranged on the diagonal position of the upper end surface of the lower die holder 1, wherein the external dimension of the workpiece supporting table 2 is adapted to the external dimension of the inner cavity of a workpiece 25 to be processed, a plurality of tooth-shaped forming grooves 3 which are concave in radial direction and are adapted to the external dimension of each tooth-shaped groove 26 are formed on the peripheral wall in a one-to-one correspondence manner according to the forming position of each tooth-shaped groove 26 of the workpiece 25 to be processed, the workpiece 25 to be processed can be sleeved on the workpiece supporting table 2 with an opening downwards, and the pair of guide posts 4 are vertically arranged and positioned at the periphery of the workpiece supporting table 2;
The upper die comprises an upper die seat 5, an upper die cushion plate 6, a fixed plate 8, a plurality of groups of roller assemblies 15 and a pair of vertically arranged guide sleeve assemblies; the upper die holder 5, the upper die cushion plate 6 and the fixed plate 8 are sequentially stacked from top to bottom and are fixedly connected; the roller assemblies 15 are fixedly clamped between the upper die cushion plate 6 and the fixed plate 8 through a pair of roller clamping plates 16, an upper roller 18 and a lower roller 19 which are arranged between the pair of roller clamping plates 16 at an upper-lower interval and can rotate around the central axis of the corresponding wheel body respectively are suspended below the fixed plate 8, a plurality of groups of roller assemblies 15 are correspondingly distributed along the circumferential direction according to the positions of the tooth-shaped forming grooves 3 on the lower die workpiece supporting table 2, and when the upper die and the lower die are clamped, the lower roller 19 and the upper roller 18 can be rolled in the tooth-shaped groove 26 forming positions from top to bottom in sequence according to the outer circumferential surface of the outer side of the workpiece 25 to be processed, and are matched with the tooth-shaped forming grooves 3 at the corresponding positions on the lower die workpiece supporting table 2 to form tooth-shaped grooves 26 on the workpiece 25, and the radius of the upper roller 18 is larger than the radius of the lower roller 19 so as to form the finished product size of the tooth-shaped grooves 26; the guide sleeve assemblies are opposite to the guide posts 4 vertically, the guide sleeve assemblies are respectively arranged at the diagonal positions of the lower end face of the upper die holder 5, the ball guide sleeves 22 of the guide sleeve assemblies are fixedly arranged on the lower end face of the upper die, the lower end of each guide sleeve assembly is provided with an opening, the inner cavity is sleeved with a steel ball sleeve 23 with a plurality of movable steel balls 24 embedded in a peripheral wall and vertically penetrated, the lower end parts of the steel ball sleeves 23 are exposed out of the ball guide sleeves 22, the top ends of the steel ball sleeves 23 are vertically spaced from the inner cavity top wall of the ball guide sleeves 22, the outer dimensions of the inner cavities are adapted to the guide posts 4, the guide sleeve assemblies are matched with the guide posts 4 to form a guide and support structure when the upper die and the lower die are matched, the steel ball sleeves 23 are inserted into the steel ball sleeves 4, the steel ball sleeves 23 are pushed to move upwards by virtue of friction force between the steel balls 24 and the outer walls of the guide posts 4 and the inner cavity side walls of the ball guide sleeves 22, a gap is reserved between the top ends of the steel ball sleeves 23 and the inner cavity top wall of the ball guide sleeves 22, and a space is reserved vertically between the upper die and a workpiece 25 to be processed.
In a specific implementation, the corresponding structure arrangement also includes:
the radius of the upper roller 18 is 0.1mm larger than the radius of the lower roller 19.
The peripheral wall of the steel ball sleeve 23 is provided with a plurality of steel ball 24 hole groups which are axially arranged, the steel ball 24 hole groups are circumferentially and alternately distributed, each steel ball 24 hole group consists of a plurality of steel ball 24 holes which are axially and equally spaced, steel balls 24 are embedded in each steel ball 24 hole, the outer sides of the steel balls 24 are exposed and contacted with the side wall of the inner cavity of the ball guide sleeve 22, the inner sides of the steel balls 24 are exposed in the inner cavity of the steel ball sleeve 23, and the steel balls can be tightly contacted with the outer wall of the guide post 4 inserted into the inner cavity of the steel ball sleeve 23 during die assembly. The guide post 4 and the guide sleeve component cooperate to accurately guide and stabilize the linear motion of the upper die during die assembly, and simultaneously play a certain supporting role on the upper die, thereby being beneficial to preventing the damage of the die or the workpiece caused by excessive downward movement of the upper die. The steel balls 24 on the steel ball sleeve 23 ensure that the steel ball sleeve 23 is in rolling contact with the ball guide sleeve 22 and the guide post 4 when being pushed upwards, so that direct friction is avoided, and lubricating grease is required to be added when the novel ball guide is used.
When the die assembly is completed, the clearance value reserved between the top end of the steel ball sleeve 23 and the top wall of the inner cavity of the ball guide sleeve 22 is smaller than the vertical clearance value reserved between the whole upper die and the workpiece 25 to be processed. When the die assembly is completed, a gap is reserved between the top end of the steel ball sleeve 23 and the top wall of the inner cavity of the ball guide sleeve 22, and the gap can be used as a buffer gap when the upper die moves down excessively, and when the guide post 4 is propped against the guide sleeve assembly, the limit for excessive downward movement of the upper die is achieved.
The structure of the roller assembly 15 is set as follows:
The gap between the pair of roller clamping plates 16 is right opposite to the thickness of the roller body, the upper roller 18 and the lower roller 19 are assembled between the pair of roller clamping plates 16 in the same structural form in an up-down interval manner, and are coaxially sleeved on the corresponding roller shafts 20, the roller shafts 20 are supported in the shaft holes 17 of the pair of roller clamping plates 16 through the flanging bearing bushes 21 by virtue of the two shaft ends of the roller shafts 20, and can rotate between the pair of roller clamping plates 16 around the central axis of the roller shafts 20 under the action of external force, the roller clamping plates 16 are of L-shaped structures, and the short plate sections of the pair of roller clamping plates 16 are upwards and reversely arranged to jointly form the mounting end parts assembled with the upper die cushion plate 6; the outer peripheral surface of the upper roller 18 and the outer peripheral surface of the lower roller 19 are correspondingly arranged according to the outer peripheral surface of the tooth-shaped groove 26.
The upper die cushion plate 6 is in a circular plate-shaped structure, the fixed plate 8 is in an annular plate-shaped structure, the upper die cushion plate and the fixed plate are coaxially stacked and assembled on the lower end surface of the upper die holder 5, are fastened with the upper die holder 5 through bolts 10 (six bolts are uniformly distributed along the circumferential direction in the embodiment), corresponding bolt holes 11 are respectively formed in the fastened parts of the bolts 10, and are positioned by means of positioning pins during assembly, and corresponding positioning holes 14 are respectively formed in the positioning pins; in the embodiment, the positioning pin adopts a cylindrical pin 12 and a diamond pin 13 for positioning;
Rectangular grooves 7 are formed in the upper die base plate 6 at the positions where the upper die base plate and the roller assemblies 15 are assembled, the groove depth is matched with the plate thickness of the short plate sections of the roller clamping plates 16, and the groove width and the groove length are matched with the outline dimensions of the mounting end parts of the pair of roller clamping plates 16; the fixing plate 8 is provided with a mounting hole 9, the upper ends of a pair of roller clamping plates 16 of the roller assembly 15 are embedded in the rectangular groove 7 in a matching way, the plate body passes through the mounting hole 9 and respectively abuts against the wall of the side hole, and the upper roller 18 and the lower roller 19 are suspended below the fixing plate 8.
The mounting hole 9 is of a convex structure, the small end faces outwards along the radial direction of the fixing plate 8, the large end faces inwards along the radial direction and forms an opening along the inner edge of the fixing plate 8, the width of the large end hole is adapted to the overall outline width of a pair of roller clamping plates 16 of the roller assembly 15, the width of the small end hole is adapted to the thickness of the roller, a single roller can be accommodated to pass through the small end hole, and the pair of roller clamping plates 16 respectively abut against the wall of two sides of the large end of the mounting hole 9.
The clutch hub double-roller composite die of the embodiment can be arranged on a hydraulic machine, the lower die is arranged on a workbench surface of the hydraulic machine as a fixing member, and the upper die is driven by the hydraulic machine to vertically displace.
In the tooth form forming process, the workpiece 25 to be machined is first placed on the workpiece support table 2 of the lower die holder 1. Under the drive of a hydraulic press, the upper die moves downwards, in the downward moving process, the lower roller 19 of the roller assembly 15 is firstly contacted with the forming position of the tooth-shaped groove 26 of the workpiece 25 to be processed, the tooth-shaped groove 26 of the workpiece 25 to be processed is rolled for the first time by virtue of the lower roller 19, a plurality of groups of roller assemblies 15 simultaneously act on the workpiece 25 to be processed during rolling, the horizontal movement of the workpiece 25 to be processed plays a limiting role, and meanwhile, the guide sleeve assembly of the upper die holder 5 is matched with the guide post 4 of the lower die holder 1 to play a role of accurate guiding, the stability of the linear movement of the upper die is guaranteed, the relative deviation of the upper die and the lower die is prevented, and the forming precision of the workpiece is improved;
When the upper die continues to move downwards, the upper roller 18 of the roller assembly 15 contacts the forming position of the tooth-shaped groove 26 of the workpiece 25 to be processed until the upper roller 18 is completely matched with the die, and the tooth-shaped groove 26 of the workpiece 25 to be processed is rolled for the second time, so that the tooth-shaped groove 26 matched with the tooth-shaped forming groove 3 on the workpiece support table 2 is formed on the workpiece 25 to be processed. Wherein the radius of the upper roller 18 is set to be 0.1mm larger than that of the lower roller 19 for ensuring the size of the finished product. After the tooth form is formed, the upper die moves upwards, the formed workpiece is taken out (as shown in figure 2), and all the working procedures are completed. The roller assembly 15 is clamped and fixed by the upper die cushion plate 6 and the fixed plate 8, and radial pressure can be counteracted in the forming process to stabilize the forming process. The die completes the tooth form forming process at one time by applying the rolling technology to stamping.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. The utility model provides a clutch hub double roller composite mold for processing tooth form clutch hub, tooth form clutch hub is formed with a plurality of tooth form grooves (26) that are circumference interval equipartition around the axis in the lateral wall, tooth form groove (26) are along radial indent, link up along the axial, characterized by:
The double-roller composite die is used for a tooth-shaped forming process of the clutch hub, a workpiece (25) to be processed is a tooth-shaped clutch hub inner hub opening hollow piece formed after blanking and deep drawing processes, and the double-roller composite die is composed of a lower die and an upper die;
the lower die comprises a lower die holder (1), a workpiece supporting table (2) arranged on the upper end surface of the lower die holder (1) and a pair of guide posts (4) respectively arranged on the diagonal position of the upper end surface of the lower die holder (1), wherein the external dimension of the workpiece supporting table (2) is adapted to the external dimension of an inner cavity of a workpiece (25) to be processed, a plurality of tooth-shaped forming grooves (3) which are concave in the radial direction and are adapted to the tooth-shaped grooves (26) in the external dimension are formed on the peripheral wall in a one-to-one correspondence manner according to the forming positions of the tooth-shaped grooves (26) of the workpiece (25), the workpiece (25) to be processed can be sleeved on the workpiece supporting table (2) downwards through an opening, and the pair of guide posts (4) are vertically arranged and are positioned on the periphery of the workpiece supporting table (2);
The upper die comprises an upper die seat (5), an upper die cushion plate (6), a fixed plate (8), a plurality of groups of roller assemblies (15) and a pair of vertically arranged guide sleeve assemblies; the upper die holder (5), the upper die cushion plate (6) and the fixed plate (8) are sequentially stacked from top to bottom and are fixedly connected; the roller assemblies (15) are fixedly clamped between the upper die cushion plate (6) and the fixed plate (8) through a pair of roller clamping plates (16), upper rollers (18) and lower rollers (19) which are arranged between the pair of roller clamping plates (16) at intervals up and down and can rotate around the central axis of the corresponding wheel body respectively are suspended below the fixed plate (8), a plurality of groups of roller assemblies (15) are correspondingly distributed along the circumferential direction according to the positions of tooth-shaped forming grooves (3) on a lower die workpiece supporting table (2), and when an upper die is clamped with a lower die, the lower rollers (19) and the upper rollers (18) can roll in the forming positions of tooth-shaped grooves (26) from top to bottom in sequence according to the outer peripheral surface of the workpiece (25) to be processed, and are matched with the tooth-shaped forming grooves (3) at the corresponding positions on the lower die workpiece supporting table (2), so that the radius of the upper rollers (18) is larger than the radius of the lower rollers (19) and is used for forming the size of the tooth-shaped grooves (26) of a finished product; the guide sleeve assemblies are vertically opposite to the guide posts (4) and are respectively arranged at the diagonal positions of the lower end face of the upper die holder (5), the ball guide sleeves (22) of the guide sleeve assemblies are fixedly arranged on the lower end face of the upper die, the lower end of each guide sleeve assembly is open, a plurality of steel ball sleeves (23) which can move through vertically are embedded in the peripheral wall of each inner cavity, a plurality of movable steel balls (24) are embedded in the inner cavities, the lower end parts of the steel ball sleeves (23) are exposed out of the ball guide sleeves (22), a vertical reserved space is reserved between the top ends of the steel ball sleeves and the top walls of the inner cavities of the ball guide sleeves (22), the outline dimension of each inner cavity is adapted to the guide post (4), the guide sleeve assemblies are matched with the guide posts (4) to form a guide and support structure when the upper die and the lower die are matched, the steel ball sleeves (23) are inserted into the steel ball sleeves (24), the steel ball sleeves (23) are pushed to move upwards by virtue of friction force between the outer walls of the steel balls (24) and the inner walls of the guide posts (22), and gaps are reserved between the top ends of the steel ball sleeves (23) and the top walls of the inner cavities of the ball guide sleeves (22), and spaces are reserved vertically between the upper die and a workpiece (25) to be processed.
2. The clutch hub dual roller composite mold according to claim 1, wherein: the radius of the upper roller (18) is 0.1mm larger than that of the lower roller (19).
3. The clutch hub dual roller composite mold according to claim 1, wherein:
The peripheral wall of the steel ball sleeve (23) is provided with a plurality of steel ball (24) hole groups which are axially arranged, the steel ball (24) hole groups are circumferentially and uniformly distributed at intervals, each steel ball (24) hole group is formed by a plurality of steel ball (24) holes which are axially and uniformly distributed at intervals, the steel balls (24) are embedded in each steel ball (24) hole, the outer sides of the steel balls (24) are exposed and contacted with the side wall of the inner cavity of the steel ball guide sleeve (22), the inner sides of the steel balls are exposed in the inner cavity of the steel ball sleeve (23), and the inner sides of the steel balls can be tightly contacted with the outer wall of a guide post (4) inserted into the inner cavity of the steel ball sleeve (23) during die assembly.
4. A clutch hub double roller composite mould according to claim 1 or 3, characterized in that: when the die assembly is completed, the clearance value reserved between the top end of the steel ball sleeve (23) and the top wall of the inner cavity of the ball guide sleeve (22) is smaller than the vertical clearance value reserved between the whole upper die and the workpiece (25) to be processed.
5. The clutch hub double-roller composite mold according to claim 1, characterized in that the roller assembly (15) is structured as follows:
The gap between the pair of roller clamping plates (16) is right opposite to the thickness of the roller body, the upper roller (18) and the lower roller (19) are assembled between the pair of roller clamping plates (16) in the same structural form in an up-down interval mode, the upper roller and the lower roller are coaxially sleeved on the corresponding roller shafts (20), the roller shafts (20) are supported in shaft holes (17) of the pair of roller clamping plates (16) through bearing bushes at two shaft ends, the roller shafts (20) can rotate between the pair of roller clamping plates (16) around the central axis of the roller shafts (20) under the action of external force, the roller clamping plates (16) are of L-shaped structures, and short plate sections of the pair of roller clamping plates (16) are upwards and reversely arranged to jointly form the mounting end parts assembled with the upper die cushion plate (6).
6. The clutch hub double-roller composite mold according to claim 1 or 5, characterized in that:
the upper die cushion plate (6) is of a circular plate-shaped structure, the fixing plate (8) is of an annular plate-shaped structure, the fixing plate and the upper die cushion plate are coaxially stacked and assembled on the lower end face of the upper die holder (5), the fixing plate and the upper die holder (5) are fastened through bolts (11), corresponding bolt holes (12) are formed in fastening positions of the bolts (11), and when the fixing plate and the upper die cushion plate are assembled, the fixing plate and the upper die cushion plate are positioned by means of positioning pins, and corresponding positioning holes (14) are formed in positioning positions of the positioning pins respectively;
Rectangular grooves (7) are formed in the upper die cushion plate (6) at the assembling positions of the upper die cushion plate and the lower die cushion plate, mounting holes (9) are formed in the fixing plate (8), the upper ends of a pair of roller clamping plates (16) of the roller assemblies (15) are embedded in the rectangular grooves (7) in a matched mode, the plate bodies penetrate through the mounting holes (9) and respectively abut against the wall of the side hole, and an upper roller (18) and a lower roller (19) are suspended below the fixing plate (8).
7. The clutch hub dual roller composite mold according to claim 6, wherein: the installation hole (9) is of a convex structure, the small end is outwards in the radial direction of the fixed plate (8), the large end is inwards in the radial direction and forms an opening in the inner edge of the fixed plate (8), the width of the large end hole is adapted to the overall outline width of a pair of roller clamping plates (16) of the roller assembly (15), the width of the small end hole is adapted to the thickness of the roller, a single roller can be accommodated to penetrate through the small end hole, and the pair of roller clamping plates (16) are respectively abutted against the wall of two sides of the large end of the installation hole (9).
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