CN219335620U

CN219335620U - Camshaft mould

Info

Publication number: CN219335620U
Application number: CN202320347229.7U
Authority: CN
Inventors: 凌应战; 凌宏权
Original assignee: Bengbu Hongbao Construction Machinery Co ltd
Current assignee: Bengbu Hongbao Construction Machinery Co ltd
Priority date: 2023-03-01
Filing date: 2023-03-01
Publication date: 2023-07-14
Anticipated expiration: 2033-03-01

Abstract

The utility model discloses a cam shaft die, and relates to the technical field of dies. The utility model comprises a lower die holder and an upper die holder; the top of the lower die holder is provided with a round groove and a lower shaft groove for cam shaft die-casting forming, the lower shaft groove is arranged at the center of the bottom wall of the round groove, the bottom of the upper die holder is provided with an upper shaft groove for cam shaft die-casting forming, and the upper shaft groove and the lower shaft groove are positioned on the same axis; an arc chute is formed in the edge of the inner wall of the bottom of the circular groove, an arc slide plate is connected in a sliding manner in the arc chute, and the top of the arc slide plate is in limit sliding connection with the bottom of the upper die holder; and a demoulding mechanism for demoulding is arranged in the arc-shaped sliding plate. According to the utility model, the arc-shaped sliding plate moves up and down along with the upper die holder, so that the normal die casting of the cam shaft can be ensured through the horizontal butt joint of the supporting ring and the bottom ring, the automatic stripping effect can be realized through the rising of the supporting ring, the taking out is convenient, the operation is simple, and the processing efficiency is higher.

Description

Camshaft mould

Technical Field

The utility model belongs to the technical field of dies, and particularly relates to a cam shaft die.

Background

The camshaft is a component in a piston engine. Its function is to control the opening and closing actions of the valve. Although the rotational speed of the camshaft is half that of the crankshaft in a four-stroke engine (the rotational speed of the camshaft is the same as that of the crankshaft in a two-stroke engine), the rotational speed is still high and a large torque is required to be born, so that the requirements on strength and support of the camshaft in design are high, the camshaft is made of special cast iron generally, and forgings are adopted occasionally. Since the law of valve motion is related to the power and operating characteristics of an engine, camshaft design plays a very important role in the design process of the engine.

At present, a die of a camshaft is usually combined with an upper die holder and a lower die holder as shown in fig. 8, a calcined steel column is inserted into a hole of the lower die holder, and then the upper die holder is used for pressing and forming to obtain a camshaft blank. After the cam shaft is die-cast, the cam shaft is ejected upwards from the bottom of the lower die holder through the ejector rod on the right side of fig. 9, and then the cam shaft is taken out, so that the cam shaft die not only needs to adopt additional lifting power, but also needs to be opened for demoulding after the upper die holder is lifted, and the processing efficiency is low.

Disclosure of Invention

The utility model aims to provide a cam shaft die for reducing extra power output, reducing energy consumption and improving processing efficiency.

In order to solve the technical problems, the utility model is realized by the following technical scheme:

a camshaft mold, comprising:

a lower die holder and an upper die holder;

the top of the lower die holder is provided with a round groove and a lower shaft groove for cam shaft die-casting forming, the lower shaft groove is arranged at the center of the bottom wall of the round groove, the bottom of the upper die holder is provided with an upper shaft groove for cam shaft die-casting forming, and the upper shaft groove and the lower shaft groove are positioned on the same axis;

an arc chute is formed in the edge of the inner wall of the bottom of the circular groove, an arc slide plate is connected in a sliding manner in the arc chute, and the top of the arc slide plate is in limit sliding connection with the bottom of the upper die holder;

and a demoulding mechanism for demoulding is arranged in the arc-shaped sliding plate.

Optionally, a plurality of guide arms of top fixedly connected with of arc slide, the inside of upper die base is equipped with a plurality of guide slots, and the top of a plurality of guide arms extends in a plurality of guide slots respectively and all fixedly connected with stopper.

Optionally, the arc slide is last to be equipped with outer opening, and the one side inner wall of circular slot is equipped with the arc lug with outer opening looks adaptation.

Optionally, demoulding mechanism includes the die-supporting ring of fixed connection at arc slide inner wall, and the inner opening corresponding with outer opening has been seted up to one side of die-supporting ring, and the bottom inner wall centre of a circle position fixedly connected with end ring of circular slot, and the aperture of end ring is unanimous with the aperture of lower axle groove, and the thickness of end ring is unanimous with the thickness of die-supporting ring, and the top edge of end ring is equipped with the arc notch with die-supporting ring looks adaptation.

Optionally, a plurality of recesses have been seted up to the bottom of arc slide, and the equal fixedly connected with extension spring of the top inner wall of a plurality of recesses, and extension spring's bottom and the bottom inner wall fixed connection of arc spout.

Optionally, the top wall of the groove is lower than the setting height of the supporting ring.

Optionally, the outer wall top of die holder is the annular and has seted up multiunit through-hole, and the quantity of every through-hole of group has at least two, and a plurality of ventilative breach that correspond the complex with the through-hole have been seted up to the bottom of arc slide.

The embodiment of the utility model has the following beneficial effects:

1. through the 20Cr steel that runs through the bottom ring after heating inserts in lower axial groove, then starts hydraulic means and promotes the upper die base and move downwards, and arc slide simultaneously moves downwards through self gravity and extension spring's elasticity this moment to can play the effect of direction to the upper die base through the cooperation of guide arm and guide slot, improve the accuracy of die casting.

2. When moving down to the bottommost end through the arc slide, the backing ring can fall into the arc notch to keep flush with the bottom ring, the top forms a circular shape plane, can accomplish the die casting shaping of camshaft, and the upper die base continues to move down, at this in-process, the copper post atress warp, is finally by the die casting camshaft.

3. The upper die holder is pulled to move upwards through the hydraulic device, when the upper die holder moves to a certain height, the arc-shaped sliding plate can be pulled to move upwards through the limit fit of the limit block and the guide rod, and meanwhile the supporting ring is driven to move upwards, so that the cam shaft is automatically taken out of the lower die holder, and then the cam shaft is directly clamped out through the inner opening and the outer opening by the clamping device, so that the cam shaft is convenient to take out.

4. Through the upward movement of the arc-shaped sliding plate, the ventilation notch can be lifted to be correspondingly communicated with the through hole, the heat dissipation effect of the lower die holder is improved by utilizing the flow of air, and the service life of the device can be prolonged.

According to the utility model, the arc-shaped sliding plate moves up and down along with the upper die holder, so that the normal die casting of the cam shaft can be ensured through the horizontal butt joint of the supporting ring and the bottom ring, the automatic die-casting effect can be realized through the lifting of the supporting ring, the die-casting die is convenient to take out, the operation is simple, and the processing efficiency is higher.

Of course, it is not necessary for any one product to practice the utility model to achieve all of the advantages set forth above at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of an overall structure of a first embodiment of the present utility model;

FIG. 2 is a front cross-sectional view of the overall structure of a first embodiment of the present utility model;

FIG. 3 is a further cross-sectional view of the overall structure of FIG. 2 in accordance with one embodiment of the present utility model;

FIG. 4 is a perspective view of a lower die holder according to a first embodiment of the present utility model;

FIG. 5 is a top view of a lower die holder according to a first embodiment of the present utility model;

FIG. 6 is a bottom view of an upper die holder according to a first embodiment of the present utility model;

FIG. 7 is a perspective view of an arc-shaped skateboard connection structure according to a first embodiment of the present utility model;

FIG. 8 is a schematic view of a cam shaft molding and demolding state structure according to a second embodiment of the present utility model;

FIG. 9 is a physical diagram of a prior camshaft mold;

fig. 10 is a physical view of a conventional camshaft.

In the figure: 1. a lower die holder; 2. a circular groove; 3. a lower shaft groove; 4. an upper die holder; 5. an upper shaft groove; 6. arc-shaped protruding blocks; 7. an arc chute; 8. an arc-shaped sliding plate; 9. a guide rod; 10. a guide groove; 11. a limiting block; 12. an outer opening; 13. a backing ring; 14. an inner opening; 15. a bottom ring; 16. an arc-shaped notch; 17. a groove; 18. a tension spring; 19. a through hole; 20. and a ventilation notch.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "open," "upper," "middle," "length," "inner," and the like indicate an orientation or a positional relationship, and are merely for convenience of describing the present utility model and simplifying the description, but do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In order to keep the following description of the embodiments of the present utility model clear and concise, the detailed description of known functions and known components thereof have been omitted.

Example 1

Referring to fig. 1 to 7, in this embodiment, a camshaft mold is provided, which includes a lower die holder 1 and an upper die holder 4; the top of the lower die holder 1 is provided with a round groove 2 and a lower shaft groove 3 for cam shaft die casting, the lower shaft groove 3 is arranged at the center of the bottom wall of the round groove 2, the bottom of the upper die holder 4 is provided with an upper shaft groove 5 for cam shaft die casting, and the upper shaft groove 5 and the lower shaft groove 3 are positioned on the same axis; an arc chute 7 is formed in the edge of the inner wall of the bottom of the circular groove 2, an arc slide plate 8 is connected to the inside of the arc chute 7 in a sliding manner, and the top of the arc slide plate 8 is in limiting sliding connection with the bottom of the upper die holder 4.

In one aspect of the present embodiment, as shown in fig. 3 and 7, the top of the arc-shaped sliding plate 8 is fixedly connected with a plurality of guide rods 9, a plurality of guide grooves 10 are provided in the upper die holder 4, and the top ends of the plurality of guide rods 9 respectively extend into the plurality of guide grooves 10 and are fixedly connected with limiting blocks 11. Through the cooperation of guide arm 9 and guide slot 10, can play the effect of direction compound die to upper die base 4 to can drive arc slide 8 synchronous upward movement through guide arm 9 when upper die base 4 upwards moves through stopper 11.

In one aspect of this embodiment, as shown in fig. 4 and 7, the arc-shaped sliding plate 8 is provided with an outer opening 12, and an inner wall of one side of the circular groove 2 is provided with an arc-shaped protruding block 6 adapted to the outer opening 12. In the up-and-down movement process of the arc-shaped sliding plate 8, the arc-shaped sliding plate 8 can slide along the arc-shaped protruding block 6 through the outer opening 12, and a whole circle can be formed by the contact of the arc-shaped sliding plate 8 and the arc-shaped protruding block 6, and the die-casting forming of the cam shaft can be facilitated through the whole circle.

In another aspect of the present embodiment, as shown in fig. 3 and 7, a plurality of grooves 17 are formed at the bottom of the arc-shaped sliding plate 8, extension springs 18 are fixedly connected to the top inner walls of the plurality of grooves 17, and the bottom ends of the extension springs 18 are fixedly connected to the bottom inner walls of the arc-shaped sliding grooves 7. When the arc-shaped sliding plate 8 moves upwards, the extension spring 18 can be pulled, so that the arc-shaped sliding plate 8 can play a better reset effect by matching with the gravity of the arc-shaped sliding plate 8 in the downward movement process, and the supporting ring 13 and the bottom ring 15 can be effectively abutted conveniently.

In other aspects of this embodiment, as shown in FIG. 3, the top wall of the groove 17 is lower than the mounting height of the ring 13. The arrangement can ensure the stress thickness of the arc-shaped sliding plate 8 when the cam shaft is die-cast, so that the arc-shaped sliding plate 8 is not easy to deform and has strong bearing capacity.

Example two

Improvement on the basis of the first embodiment: as shown in fig. 1-7, the camshaft mold further comprises a demolding mechanism which is arranged in the arc-shaped sliding plate 8 and used for demolding, the demolding mechanism comprises a supporting ring 13 fixedly connected to the inner wall of the arc-shaped sliding plate 8, an inner opening 14 corresponding to the outer opening 12 is formed in one side of the supporting ring 13, a bottom ring 15 is fixedly connected to the center of the circle of the inner wall of the bottom of the circular groove 2, the aperture of the bottom ring 15 is consistent with the aperture of the lower shaft groove 3, the thickness of the bottom ring 15 is consistent with the thickness of the supporting ring 13, and an arc-shaped notch 16 matched with the supporting ring 13 is formed in the top edge of the bottom ring 15.

After the arc slide 8 moves down, the supporting ring 13 can be just positioned in the arc notch 16, horizontally abutted with the bottom ring 15, a round flat surface is formed at the top, die casting of the cam shaft can be completed, after the cam shaft is die casting, the upper die holder 4 moves up, the arc slide 8 is driven to move up through the guide rod 9, meanwhile, the supporting ring 13 is driven to move up, the die-cast cam shaft can be taken out of the lower die holder 1, and then the cam shaft is directly taken out from the inner opening 14 and the outer opening 12.

Example III

Improvement on the basis of the first embodiment: as shown in fig. 3, 4 and 7, a plurality of groups of through holes 19 are annularly formed above the outer wall of the lower die holder 1, and at least two groups of through holes 19 are provided, and a plurality of ventilation gaps 20 corresponding to the through holes 19 are formed in the bottom of the arc-shaped sliding plate 8.

When the arc-shaped sliding plate 8 moves upwards to perform demoulding operation, the ventilation notch 20 can be correspondingly communicated with the through hole 19, and the heat dissipation effect of the space in the circular groove 2 can be improved through ventilation of air; when the arc-shaped sliding plate 8 moves downwards to perform die casting operation, the ventilation notch 20 moves downwards into the arc-shaped sliding groove 7, and the through hole 19 is plugged through the arc-shaped sliding plate 8, so that the die casting of the cam shaft is facilitated.

The technical scheme of the utility model comprises the following use flows and working principles:

firstly, the heated 20Cr steel penetrates through the bottom ring 15 and is inserted into the lower shaft groove 3, then the hydraulic device is started to push the upper die holder 4 to move downwards, at the moment, the arc-shaped sliding plate 8 synchronously moves downwards through the gravity of the arc-shaped sliding plate and the elasticity of the stretching spring 18, the upper die holder 4 can be guided through the cooperation of the guide rod 9 and the guide groove 10, and in the process, the top end of the copper column can extend into the upper shaft groove 5. When the arc slide plate 8 moves to the bottommost end, the supporting ring 13 falls into the arc notch 16 and keeps flush with the bottom ring 15, and the upper die holder 4 continues to move downwards, and in the process, the copper column is stressed to deform and finally is die-cast into a cam shaft. After die casting is completed, when the die is lifted, the hydraulic device pulls the upper die holder 4 to move upwards, when the upper die holder 4 moves to a certain height, the arc-shaped sliding plate 8 can be pulled to move upwards through the limit fit of the limit block 11 and the guide rod 9, and meanwhile, the supporting ring 13 is driven to move upwards, so that the cam shaft is automatically taken out of the lower die holder 1, and then the cam shaft is directly clamped out through the inner opening 14 and the outer opening 12 by using the clamping device. After the arc-shaped sliding plate 8 moves upwards, the ventilation notch 20 can be lifted to be correspondingly communicated with the through hole 19, and the heat dissipation effect of the lower die holder 1 is improved by utilizing the flow of air.

It should be noted that in the description of the present specification, descriptions such as "first", "second", etc. are merely for distinguishing features, and there is no actual order or sense of orientation, and the present application is not limited thereto.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the utility model disclosed above are intended only to assist in the explanation of the utility model. The preferred embodiments are not exhaustive or to limit the utility model to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, to thereby enable others skilled in the art to best understand and utilize the utility model. The utility model is limited only by the claims and the full scope and equivalents thereof.

Claims

1. A camshaft mold, comprising:

a lower die holder (1) and an upper die holder (4);

the top of the lower die holder (1) is provided with a round groove (2) and a lower shaft groove (3) for cam shaft die casting, the lower shaft groove (3) is arranged at the center of the bottom wall of the round groove (2), the bottom of the upper die holder (4) is provided with an upper shaft groove (5) for cam shaft die casting, and the upper shaft groove (5) and the lower shaft groove (3) are positioned on the same axis;

an arc chute (7) is formed in the edge of the inner wall of the bottom of the circular groove (2), an arc slide plate (8) is connected inside the arc chute (7) in a sliding manner, and the top of the arc slide plate (8) is in limiting sliding connection with the bottom of the upper die holder (4);

and a demoulding mechanism for demoulding is arranged in the arc-shaped sliding plate (8).

2. A camshaft die as claimed in claim 1, wherein the top of the arc-shaped slide plate (8) is fixedly connected with a plurality of guide rods (9), a plurality of guide grooves (10) are formed in the upper die holder (4), and the top ends of the guide rods (9) respectively extend into the guide grooves (10) and are fixedly connected with limiting blocks (11).

3. A camshaft mould according to claim 1 or 2, characterized in that the arc-shaped slide plate (8) is provided with an outer opening (12), and the inner wall of one side of the circular groove (2) is provided with an arc-shaped protruding block (6) which is matched with the outer opening (12).

4. A camshaft die as claimed in claim 3, characterized in that the demoulding mechanism comprises a supporting ring (13) fixedly connected to the inner wall of the arc-shaped sliding plate (8), an inner opening (14) corresponding to the outer opening (12) is formed in one side of the supporting ring (13), a bottom ring (15) is fixedly connected to the center of the circle of the inner wall of the bottom of the circular groove (2), the aperture of the bottom ring (15) is consistent with the aperture of the lower shaft groove (3), the thickness of the bottom ring (15) is consistent with the thickness of the supporting ring (13), and an arc-shaped notch (16) matched with the supporting ring (13) is formed in the top edge of the bottom ring (15).

5. The camshaft die of claim 4, wherein a plurality of grooves (17) are formed in the bottom of the arc-shaped sliding plate (8), extension springs (18) are fixedly connected to the inner walls of the tops of the grooves (17), and the bottom ends of the extension springs (18) are fixedly connected with the inner walls of the bottoms of the arc-shaped sliding grooves (7).

6. A camshaft mould according to claim 5, characterized in that the top wall of the recess (17) is lower than the setting height of the carrier ring (13).

7. The camshaft die of claim 1, wherein a plurality of groups of through holes (19) are annularly formed above the outer wall of the lower die holder (1), at least two groups of through holes (19) are formed, and a plurality of ventilation notches (20) which are correspondingly matched with the through holes (19) are formed in the bottom of the arc-shaped sliding plate (8).