CN207735539U - A kind of shaping dies of helical gear profile - Google Patents

Abstract

The utility model discloses a kind of shaping dies of helical gear profile, the mold includes hydraulic mechanism, upper die mechanism and lower die mechanism, upper die mechanism includes upper die holder, upper mold and pressure lever mechanism, the center of upper mold is equipped with first through hole, pressure lever mechanism includes compression bar and the second power plant, lower die mechanism includes lower die holder, lower mold and post rod mechanism, the center of lower mold is equipped with accommodating chamber, accommodating chamber is for placing workpiece to be formed, the inner wall of accommodating chamber is equipped with spiral alveolar, the bottom centre of accommodating chamber is equipped with the second through-hole, post rod mechanism includes mandril and third power plant, mandril runs through the second through-hole.In the utility model in such a way that spiral alveolar is located in lower mold, workpiece to be formed is set to form tooth form during cold-press moulding, and it forms metal charge extra in tooth form and is moved to the middle part of workpiece to be formed, it avoids and spiral alveolar is set to the problem of causing clout to be assembled to workpiece end face in upper mold in the prior art, improve forming effect.

Description

A kind of shaping dies of helical gear profile

Technical field

The utility model is related to cold extruding technique fields, more particularly to a kind of shaping dies of helical gear profile.

Background technology

Cold extrusion is that metal blank is placed in cold extrusion die cavity (generally cavity plate), at room temperature, by forcing press Fixed punch-pin applies pressure to blank, and metal blank is made to generate plastic deformation and the processing method of obtained part.Cold extrusion is One of chipless, few chip parts machining process, are a kind of advanced technologies methods in Metal Forming.Spiral bevel gear is Important part in machinery.Such part shape is complicated, is produced using milling method always, this traditional processing side Method process is more, and low production efficiency, spillage of material is big, and cost is higher, it is difficult to meet the needs of mass production.Cold extruding technique has There is the advantages that production efficiency is high, and material consumption is low, and product mechanical performance is high.The production for being applied to spiral bevel gear not only may be used To greatly reduce production cost, moreover it is possible to which the mechanical performance for improving part obtains higher dimensional precision and smaller surface roughness High-quality product.When the reference cone angle of spiral bevel gear is more than 45 °, only need to squeeze when ejecting after cold extrusion tooth forming Part pushes up from the bottom up.But when the reference cone angle of spiral bevel gear is less than 45 °, ejected from cavity plate after cold extrusion tooth forming Shi Bixu is rotated extrusion while pushing up from the bottom up by gear helical angle, can just make extrusion intact de- from cavity plate Mould.

Utility model content

The purpose of this utility model be to provide it is a kind of it is simple for process, forming effect is good, the convenient helical gear profile of pickup Shaping dies so that the problem of complex process existing in the prior art, forming effect difference and pickup difficulty is addressed.

To achieve the above object, the utility model provides following scheme：The utility model provides a kind of spiral grear teeth The shaping dies of shape, including hydraulic mechanism, upper die mechanism and lower die mechanism, the hydraulic mechanism include upper table, lower work Platform and the first power plant being arranged above the upper table, the upper die mechanism includes upper die holder, upper mold and compression bar Mechanism, the upper die holder are connected with the upper table, and the upper mold is arranged in the upper die holder, the upper mold It is provided centrally with first through hole, the pressure lever mechanism includes the compression bar being connected and the second power plant, and the compression bar runs through institute State first through hole, second power plant is arranged in the upper die holder, the lower die mechanism include lower die holder, lower mold and Post rod mechanism, the lower die holder are connected with the lower table, and the lower mold is arranged in the lower die holder, the lower die Tool is provided centrally with accommodating chamber, and the accommodating chamber is provided with spiral shell for placing workpiece to be formed on the inner wall of the accommodating chamber Tooth socket is revolved, the bottom centre of the accommodating chamber is provided with the second through-hole, and the post rod mechanism includes the mandril being connected and third Power plant, the mandril run through second through-hole, and the third power plant is arranged in the lower die holder.

Preferably, first power plant, second power plant and the third power plant are hydraulic press Structure, first power plant are two cylinder hydraulic press of vertical four column, and second power plant and the third power plant are equal For single-column hydraulic cylinder.

Preferably, upper shoulder hole and downstairs hole, institute are respectively arranged on the workpiece surface to be formed and lower surface It states and is not connected between upper shoulder hole and the downstairs hole, the bottom cascaded surface of the upper shoulder hole contacts company with the compression bar It connects, the bottom cascaded surface in the downstairs hole is connect with the ejector pin contact.

Preferably, setting jacks up convex block, the top cascaded surface for jacking up convex block and the downstairs hole on the mandril It connects, setting supercharging convex block, the supercharging convex block contact company with the top cascaded surface of the upper shoulder hole on the compression bar It connects.

Preferably, the thickness for jacking up convex block not less than the downstairs hole top cascaded surface and the lower surface it Between vertical range, it is described supercharging convex block thickness not less than the upper shoulder hole top cascaded surface and the upper surface between Vertical range.

Preferably, the diameter of the first through hole be not more than the upper shoulder hole top cascaded surface diameter, described second The diameter of through-hole is not more than the top basal diameter in the downstairs hole, the first through hole of second through-hole and described the The central axis of two through-holes overlaps.

A kind of manufacturing process of the helical gear profile using above-mentioned shaping dies is also provided in the utility model, including such as Lower step：

By blank heating to 1100-1200 DEG C, the blank after heating is put into jumping-up under forcing press, forms round pie jumping-up Jumping-up part is put on Preform Die and carries out blocking by part, forms shape and the close pre- forging of product design, pre- forging is put into It is punched out on punching die, forms the work to be formed for being respectively arranged with upper shoulder hole and downstairs hole in upper and lower surface Part；

The workpiece to be formed is put into the accommodating chamber of lower mold, starts the first power plant, first power plant Control upper table moves downward, while upper die mechanism is moved downwardly together with the upper table, in the upper die mechanism Upper mold be in contact with the upper surface of the workpiece to be formed, while starting the second power plant and third power plant, institute It states the second power plant and the third power plant controls compression bar and mandril movement, the compression bar and mandril difference respectively It is connected with the bottom cascaded surface in the upper shoulder hole and downstairs hole；

First power plant controls the upper table and the upper die mechanism continues to move downward, the upper mold machine Upper mold described in structure squeezes the workpiece to be formed, forms helical gear profile work and completes.

Preferably, after the completion of forming helical gear profile work, the third power plant controls the mandril and continues It moves, the workpiece that the jack-up convex block on the mandril will form helical gear profile ejects.

The utility model achieves following advantageous effect compared with the existing technology：

1, it is arranged in lower mold using by spiral alveolar in the shaping dies of helical gear profile provided by the utility model In mode so that workpiece to be formed directly forms tooth form during cold-press moulding, and forms metal charge extra in tooth form To the movement of the middle part of workpiece to be formed (since workpiece to be formed is completed to wrap up by the accommodating chamber of lower mold so that workpiece it is circumferential by Power is uniform), avoiding that spiral alveolar is arranged in upper mold in the prior art causes excess metal material to gather to workpiece end face The problem of collection, improves forming effect, and cold moudling decreases processing step so that simple for process；And it uses and is waiting for It is respectively arranged with upper shoulder hole and downstairs hole in shaping workpiece upper and lower surface, and is provided with and upper shoulder hole and lower rank The mode of mandril and compression bar that terraced hole is in contact so that extra metal charge is easier into workpiece to be formed after formation tooth form Portion moves, and avoids in existing cold moudling that entity causes excess metal material to be assembled to workpiece end face centered on workpiece to be formed The problem of, while mandril and compression bar are in contact with upper shoulder hole and downstairs hole, but also squeezing the stream of formation in forming process Dynamic metal charge is evenly distributed in inside workpiece, avoids flowing metal charge and is unevenly distributed and flows out asking for workpiece body Topic.

2, using setting jack-up convex block, top on mandril in the shaping dies of helical gear profile provided by the utility model It plays convex block and the top cascaded surface in downstairs hole connects, and the mode that mandril is connected with third power plant so that work It after part forming, can be ejected, avoid gear taper is smaller from causing workpiece to be not easily taken out and take out to easily lead to workpiece damage Problem.

Description of the drawings

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model Some embodiments for those of ordinary skill in the art without having to pay creative labor, can also basis These attached drawings obtain other attached drawings.

Fig. 1 is the overall structure diagram of the shaping dies of the utility model helical gear profile；

Fig. 2 be the utility model helical gear profile shaping dies in pressure lever mechanism attachment structure schematic diagram；

Fig. 3 be the utility model helical gear profile shaping dies in post rod mechanism attachment structure schematic diagram；

Fig. 4 be the utility model helical gear profile shaping dies in workpiece to be formed cross-sectional view；

Wherein, 1- upper tables, 2- lower tables, the first power plants of 3-, 4- upper die holders, 5- upper molds, 6- compression bars, 7- Mold, 10- mandrils, 11- thirds power plant, 12- workpiece to be formed, the upper ranks of 13- under second power plant, 8- lower die holders, 9- Terraced hole, 14- downstairs hole, the bottoms 15- cascaded surface, the tops 16- cascaded surface, 17- jack up convex block, 18- superchargings convex block, 19- upper tables Face, the lower surfaces 20-.

Specific implementation mode

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work The every other embodiment obtained, shall fall within the protection scope of the present invention.

The purpose of this utility model be to provide it is a kind of it is simple for process, forming effect is good, the convenient helical gear profile of pickup Shaping dies so that the problem of complex process existing in the prior art, forming effect difference and pickup difficulty is addressed.

To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, below in conjunction with the accompanying drawings and have Body embodiment is described in further detail the utility model.

As shown in Figs 1-4, the utility model provides a kind of shaping dies of helical gear profile, including hydraulic mechanism, on Mold mechanism and lower die mechanism, hydraulic mechanism include upper table 1, lower table 2 and are arranged above upper table 1 first dynamic Power apparatus 3, upper die mechanism include 6 mechanism of upper die holder 4, upper mold 5 and compression bar, and upper die holder 4 is connected with upper table 1, upper mold Tool 5 is arranged in upper die holder 4, and upper mold 5 is provided centrally with first through hole, and 6 mechanism of compression bar includes the compression bar 6 being connected and the Two power plants 7, compression bar 6 run through first through hole, and the second power plant 7 is arranged in upper die holder 4, and lower die mechanism includes lower die holder 8,10 mechanism of lower mold 9 and mandril, lower die holder 8 are connected with lower table 2, and lower mold 9 is arranged in lower die holder 8, lower mold 9 Be provided centrally with accommodating chamber, accommodating chamber is provided with spiral alveolar on the inner wall of accommodating chamber, holds for placing workpiece 12 to be formed Receiving the bottom centre of chamber is provided with the second through-hole, and 10 mechanism of mandril includes the mandril 10 being connected and third power plant 11, top Bar 10 runs through the second through-hole, and third power plant 11 is arranged in lower die holder 8.

When carrying out tooth forming work, first, mold is in die opening state, i.e., so that upper table 1, upper die mechanism Certain safe distance is moved upwards, lower table 2, lower die mechanism remain stationary as, wherein upper table 1 is relative to lower work The movement of platform 2 can be that guide post is arranged between upper table 1 and lower table 2, can also be by upper table 1 and one Guideway is connected, and upper table 1 moves up and down along guide rail；Secondly, workpiece 12 to be formed is placed on lower mold 9 In accommodating chamber, then upper table 1 is controlled, upper die mechanism moves downward so that upper die mechanism and lower die mechanism are combined, shape At mold closing state, at this point, mandril 10 in upper mold 5, compression bar 6 and lower die mechanism in upper die mechanism with workpiece to be formed 12 are in contact, and upper mold 5 squeezes workpiece 12 to be formed so that metal charge flows to the spiral alveolar of 9 accommodating chamber of lower mold Interior, workpiece 12 to be formed forms tooth form immediately, completes tooth form and forms work；It can be seen that being used spiral in the utility model The mode in lower mold 9 is arranged in tooth socket so that workpiece 12 to be formed directly forms tooth form during cold-press moulding, and is formed After tooth form extra metal charge to the movement of the middle part of workpiece 12 to be formed (since the accommodating chamber of lower mold 9 is by workpiece 12 to be formed Complete package so that workpiece circumferential direction uniform force), avoiding that spiral alveolar is arranged in upper mold 5 in the prior art causes The problem of excess metal material is assembled to workpiece end face, forming effect is improved, and cold moudling decreases processing step, made It obtains simple for process.

The first power plant 3, the second power plant 7 and third power plant 11 are hydraulic mechanism in the utility model, First power plant 3 is two cylinder hydraulic press of vertical four column, and the second power plant 7 and third power plant 11 are single-column hydraulic air Cylinder.

Form effect to improve tooth form, avoid the problem that clout accumulation occurs in forming process, in the utility model It is respectively arranged with upper shoulder hole 13 and downstairs hole 14,13 He of upper shoulder hole on 12 upper surface 19 of workpiece and lower surface 20 to be formed It is not connected between downstairs hole 14, bottom cascaded surface 15 and the compression bar 6 of upper shoulder hole 13 connect, the bottom in downstairs hole 14 Cascaded surface 15 is connected with mandril 10 so that extra metal charge is easier to the middle part of workpiece 12 to be formed after formation tooth form It is mobile, avoid in existing cold moudling that entity causes excess metal material to be assembled to workpiece end face centered on workpiece 12 to be formed The problem of, while mandril 10 and compression bar 6 are in contact with upper shoulder hole 13 and downstairs hole 14, but also squeezing shape in forming process At flowing metal charge be evenly distributed in inside workpiece, avoid flowing metal charge be unevenly distributed and flow out workpiece body The problem of.

In order to improve tooth forming effect, while pickup convenience is improved, is arranged on mandril 10 in the utility model and jacks up Convex block 17, jacks up convex block 17 and the top cascaded surface 16 in downstairs hole 14 connects, and setting supercharging convex block 18, increases on compression bar 6 Belling block 18 and the top cascaded surface 16 of upper shoulder hole 13 connect；It uses the upper of downstairs hole 14 and upper shoulder hole 13 The mode that portion's cascaded surface 16 is in contact with the supercharging convex block 18 on the jack-up convex block 17 and compression bar 6 on mandril 10 respectively so that at The flowing metal charge formed is squeezed during shape and is evenly distributed in inside workpiece, avoids flowing metal charge in downstairs hole 14 The problem of assembling with the top cascaded surface 16 of upper shoulder hole 13；Simultaneously using the setting jack-up convex block 17 on mandril 10, jack up convex Block 17 and the top cascaded surface 16 in downstairs hole 14 connect, and the mode that mandril 10 is connected with third power plant 11, It so that after component shaping, can be ejected, avoid gear taper is smaller from causing workpiece to be not easily taken out and take out to easily lead to workpiece The problem of damage.

Likewise, in order to avoid flowing metal charge is assembled in the top cascaded surface 16 of downstairs hole 14 and upper shoulder hole 13 The problem of, jack up in the utility model the thickness of convex block 17 not less than downstairs hole 14 top cascaded surface 16 and lower surface 20 it Between vertical range, supercharging convex block 18 thickness not less than upper shoulder hole 13 top cascaded surface 16 and upper surface 19 between hang down Straight distance jacks up convex block 17 by guarantee, supercharging convex block 18 comes into full contact with respective top cascaded surface 16 so that shaped The flowing metal charge that formation is squeezed in journey is evenly distributed in inside workpiece.

The diameter of first through hole is not more than 16 diameter of top cascaded surface of upper shoulder hole 13 in the utility model, it is preferred that The diameter of first through hole is equal to 16 diameter of top cascaded surface of upper shoulder hole 13, and the diameter of the second through-hole is not more than downstairs hole 14 Top basal diameter, it is preferred that the diameter of the second through-hole be equal to downstairs hole 14 top basal diameter, in order to ensure to squeeze Power be uniformly distributed and forming effect, the central axis of the first through hole of the second through-hole and the second through-hole overlap.

A kind of manufacturing process of the helical gear profile using above-mentioned shaping dies is also provided, is included the following steps：

By blank heating to 1100-1200 DEG C, the blank after heating is put into jumping-up under forcing press, forms round pie jumping-up Jumping-up part is put on Preform Die and carries out blocking by part, forms shape and the close pre- forging of product design, pre- forging is put into It is punched out on punching die, is formed and be respectively arranged with upper shoulder hole 13 and downstairs hole 14 on upper surface 19 and lower surface 20 Workpiece 12 to be formed；

Workpiece 12 to be formed is put into the accommodating chamber of lower mold 9, starts the first power plant 3, the control of the first power plant 3 Upper table 1 moves downward, while upper die mechanism is moved downwardly together with upper table 1, the upper mold 5 in upper die mechanism with The upper surface 19 of workpiece 12 to be formed is in contact, while starting the second power plant 7 and third power plant 11, the second power dress Set 7 and third power plant 11 control compression bar 6 and mandril 10 respectively and move, compression bar 6 and mandril 10 respectively with upper shoulder hole 13 and The bottom cascaded surface 15 in downstairs hole 14 connects；

First power plant 3 controls upper table 1 and upper die mechanism continues to move downward, and upper mold 5 squeezes in upper die mechanism Workpiece 12 to be formed is pressed, helical gear profile work is formed and completes.

Wherein, after the completion of helical gear profile work, passing through machine tooling upper shoulder hole 13 and downstairs hole 14 so that The endoporus of workpiece meets related request.

In the utility model after the completion of forming helical gear profile work, third power plant 11 controls mandril 10 and continues It moves, the workpiece that the jack-up convex block 17 on mandril 10 will form helical gear profile ejects.

Specific case is applied in the utility model to be expounded the principles of the present invention and embodiment, it is above The explanation of embodiment is merely used to help understand the method and its core concept of the utility model；Meanwhile for the one of this field As technical staff, according to the utility model thought, there will be changes in the specific implementation manner and application range.To sum up Described, the content of the present specification should not be construed as a limitation of the present invention.

Claims (6)

1. a kind of shaping dies of helical gear profile, which is characterized in that including hydraulic mechanism, upper die mechanism and lower die mechanism, The hydraulic mechanism includes upper table, lower table and the first power plant being arranged above the upper table, described Upper die mechanism includes upper die holder, upper mold and pressure lever mechanism, and the upper die holder is connected with the upper table, the upper mold It is arranged in the upper die holder, the upper mold is provided centrally with first through hole, and the pressure lever mechanism includes the pressure being connected Bar and the second power plant, the compression bar run through the first through hole, and second power plant is arranged in the upper die holder, The lower die mechanism includes lower die holder, lower mold and post rod mechanism, and the lower die holder is connected with the lower table, under described Mold is arranged in the lower die holder, and the lower mold is provided centrally with accommodating chamber, and the accommodating chamber is to be formed for placing Workpiece is provided with spiral alveolar on the inner wall of the accommodating chamber, and the bottom centre of the accommodating chamber is provided with the second through-hole, described Post rod mechanism includes the mandril being connected and third power plant, and the mandril runs through second through-hole, the third power Device is arranged in the lower die holder.

2. the shaping dies of helical gear profile according to claim 1, which is characterized in that first power plant, Second power plant and the third power plant are hydraulic mechanism, and first power plant is vertical four columns, two cylinder Hydraulic press, second power plant and the third power plant are single-column hydraulic cylinder.

3. the shaping dies of helical gear profile according to claim 1, which is characterized in that the workpiece upper table to be formed It is respectively arranged with upper shoulder hole and downstairs hole on face and lower surface, does not connect between the upper shoulder hole and the downstairs hole Logical, bottom cascaded surface and the compression bar of the upper shoulder hole connect, the bottom cascaded surface in the downstairs hole with it is described Ejector pin contact connects.

4. the shaping dies of helical gear profile according to claim 3, which is characterized in that be arranged on the mandril and jack up Convex block, it is described to jack up top cascaded surface contact connectio of the convex block with the downstairs hole, supercharging convex block, institute are set on the compression bar It states supercharging convex block and the top cascaded surface of the upper shoulder hole connects.

5. the shaping dies of helical gear profile according to claim 4, which is characterized in that the thickness for jacking up convex block Not less than the vertical range between the top cascaded surface and the lower surface in the downstairs hole, the thickness of the supercharging convex block is not Less than the vertical range between the top cascaded surface and the upper surface of the upper shoulder hole.

6. the shaping dies of helical gear profile according to claim 5, which is characterized in that the diameter of the first through hole No more than the top cascaded surface diameter of the upper shoulder hole, the diameter of second through-hole is not more than the top in the downstairs hole The central axis of basal diameter, the first through hole of second through-hole and second through-hole overlaps.