Mold locking mechanism for low-pressure casting and forging composite casting machine and casting machine

Abstract

The utility model discloses a mold locking mechanism for a low-pressure casting and forging composite casting machine and the casting machine. The mold locking mechanism for the low-pressure casting and forging composite casting machine comprises a mold locking oil cylinder system and a band-type brake locking system, the left band-type brake block, the connecting rod, the connecting plate and the oil cylinder body assembly are connected together, the right band-type brake block is connected with the piston rod assembly, and the band-type brake block guide plate is connected with the band-type brake block seat plate; inner tooth grooves are evenly distributed in inner holes of the left band-type brake block and the right band-type brake block, and outer tooth grooves capable of being meshed with the inner tooth grooves are distributed in the outer circle of the guide column. The band-type brake locking system is fixed on a mold locking piston rod assembly of the mold locking oil cylinder system through a band-type brake block seat plate; the mold locking oil cylinder system is fixed to the movable mold plate through a mold locking cylinder body assembly, and a guide column penetrates through the middle of a mold locking piston rod. The mechanism is simple in structure, a more stable using effect can be achieved, the abrasion rate of all parts is low, and stronger mold locking force can be provided through a mold locking oil cylinder system.

Description

Technical Field

[0001] The utility model belongs to the technical field of low-pressure casting, and particularly relates to a mold clamping mechanism and a casting machine for a low-pressure casting and forging composite casting machine. Background Art

[0002] The mold clamping mechanism of a traditional low-pressure casting machine is generally a mechanical structure of a machine hinge type. A hydraulic cylinder drives a double-crank elbow hinge system to push a moving template to move, which is a three-plate structure. Its disadvantages are: the mechanical structure is complex, the system rigidity is poor due to the long dimension chain, and the mechanical parts are easy to wear and difficult to repair, etc. Content of the Utility Model

[0003] Aiming at the above technical problems, the utility model discloses a mold clamping mechanism and a casting machine for a low-pressure casting and forging composite casting machine, which achieve a stable effect through a simpler structure.

[0004] To solve the above problems, the present invention provides the following solutions: A mold clamping mechanism for a low-pressure casting and forging composite casting machine, which mainly includes the following parts: a mold clamping oil cylinder system; a brake locking system; the brake locking system includes a left brake block 1, a right brake block 2, a connecting rod 3, a connecting plate 4, a piston rod assembly 5, an oil cylinder body assembly 6, a brake block guide plate 9, a brake block seat plate 14; the mold clamping oil cylinder system includes a mold clamping cylinder body assembly 15, a mold clamping piston rod assembly 16.

[0005] The left brake block 1, the connecting rod 3, and the connecting plate 4 are connected to the oil cylinder body assembly 6 together, the right brake block 2 is connected to the piston rod assembly 5 together, and the brake block guide plate 9 is connected to the brake block seat plate 14 together. Uniform internal tooth grooves are distributed in the inner holes of the left brake block 1 and the right brake block 2, and external tooth grooves capable of meshing with the internal tooth grooves are distributed on the outer circle of the guide post 17; the brake locking system is fixed on the mold clamping piston rod assembly 16 of the mold clamping oil cylinder system through the brake block seat plate 14.

[0006] The mold clamping oil cylinder system is fixed on the moving template 18 through the mold clamping cylinder body assembly 15, and the guide post 17 passes through the middle of the mold clamping piston rod.

[0007] Further, the contact surface of the internal tooth groove and the external tooth groove is perpendicular to the axis of the guide post, and the non-contact surface forms an angle of 30 - 60° with the axis of the guide post. Preferably, the non-contact surface forms an angle of 45° with the axis of the guide post. Adopting such a structure can ensure the strength of the tooth groove.

[0008] Further, a limiting block 8 is fixed on the brake block guide plate 9, which plays a role in protecting the guide post 17. When the internal tooth groove and the external tooth groove are meshed, the left brake block 1 and the right brake block 2 are in contact with the limiting block 8.

[0009] Furthermore, the piston rod assembly 5 is provided with a front end step, and the inside of the oil cylinder body assembly 6 is provided with a groove that cooperates with the front end step. The front end step serves as a buffer to prevent the brake block from hitting the limit block 8.

[0010] Furthermore, the brake locking system further includes a right end plate 7 and a left end plate 10. The right end plate 7, the brake block guide plate 9, and the left end plate 10 are connected together to form a brake block seat. When the piston rod assembly is in the retracted state, the left brake block 1 abuts against the left end plate 10, and the right brake block 2 abuts against the right end plate 7.

[0011] Furthermore, the piston rod assembly 5 is provided with a rear end step, and the inside of the oil cylinder body assembly 6 is provided with a groove that cooperates with the rear end step. The rear end step also serves as a buffer to prevent the brake block from hitting the right end plate 7 and the left end plate 10 of the limit.

[0012] Furthermore, the mold clamping limit switch 12 and the mold opening limit switch 13 are fixed on the oil cylinder body assembly 6; the limit switch rod 11 is connected to the right brake block 2; when the mold clamping piston rod assembly 16 is in the extended state, the limit switch rod 11 contacts the mold clamping limit switch 12; when the mold clamping piston rod assembly 16 is in the contracted state, the limit switch rod 11 contacts the mold clamping limit switch 12.

[0013] Furthermore, a locking cavity A and a releasing cavity B are formed between the oil cylinder body assembly 6 and the piston rod assembly 5.

[0014] Furthermore, a mold clamping cavity C and a mold opening cavity D are formed between the mold clamping cylinder body assembly 15 and the mold clamping piston rod assembly 16.

[0015] The present utility model also discloses a low-pressure casting and forging composite casting machine using the above-mentioned mold clamping mechanism. A casting and forging module is provided on the moving template 18. Below the moving template 18 is a mold 19. The casting and forging module includes a casting and forging oil cylinder, a casting and forging piston rod, and a casting and forging punch. The casting and forging punch includes a sealing section that isolates the mold liquid inlet, and an extrusion section located above the sealing section and having a diameter larger than that of the sealing section. Below the mold 19 is a stationary template.

[0016] The present utility model has the following beneficial effects: The mechanism has a simple structure, can achieve a more stable use effect, the wear rate of each component is low, and a stronger mold clamping force can be provided through the mold clamping oil cylinder system. The low-pressure casting and forging composite casting machine using the above-mentioned mold clamping mechanism is a two-plate structure, and the cost of the casting machine is reduced by simplifying the structure of the casting machine. Description of the Drawings

[0017] Figure 1 It is a sectional view of the mold clamping state of the mold clamping mechanism for a low-pressure casting and forging composite casting machine according to an embodiment of the present utility model.

[0018] Figure 2Partial schematic view of the mold clamping mechanism I for a low-pressure casting and forging compound casting machine according to an embodiment of the present utility model.

[0019] Figure 3 Cross-sectional view A-A of the mold clamping state of the mold clamping mechanism for a low-pressure casting and forging compound casting machine according to an embodiment of the present utility model.

[0020] Figure 4 Cross-sectional view of the mold opening state of the mold clamping mechanism for a low-pressure casting and forging compound casting machine according to an embodiment of the present utility model.

[0021] Figure 5 Cross-sectional view B-B of the mold opening state of the mold clamping mechanism for a low-pressure casting and forging compound casting machine according to an embodiment of the present utility model.

[0022] Figure 6 Overall schematic view of a low-pressure casting and forging compound casting machine using the mold clamping mechanism according to an embodiment of the present utility model.

[0023] In the figure: 1 is the left brake block, 2 is the right brake block, 3 is the connecting rod, 4 is the connecting plate, 5 is the piston rod assembly, 6 is the oil cylinder body assembly, 7 is the right end plate, 8 is the limit block, 9 is the brake block guide plate, 10 is the left end plate, 11 is the limit switch rod, 12 is the mold clamping limit switch, 13 is the mold opening limit switch, 14 is the brake block seat plate, 15 is the mold clamping cylinder body assembly, 16 is the mold clamping piston rod assembly, 17 is the guide post, 18 is the moving template, and 19 is the mold. Specific embodiments

[0024] For the convenience of those skilled in the art, the present utility model will be further described below in conjunction with embodiments and the accompanying drawings.

[0025] Embodiment 1: The mold clamping mechanism for a low-pressure casting and forging compound casting machine in this embodiment mainly includes the following parts: a mold clamping oil cylinder system; a brake locking system.

[0026] As Figures 1 - 5 shown, the left brake block 1, the connecting rod 3, the connecting plate 4 and the oil cylinder body assembly 6 are connected together by screws, and the mold clamping limit switch 12 and the mold opening limit switch 13 are fixed on the oil cylinder body assembly 6. The right brake block 2 is connected to the piston rod assembly 5, and the limit switch rod 11 is connected to the right brake block 2. When the mold clamping piston rod assembly 16 is in the extended state, the limit switch rod 11 contacts the mold clamping limit switch 12; when the mold clamping piston rod assembly 16 is in the contracted state, the limit switch rod 11 contacts the mold clamping limit switch 12.

[0027] The right end plate 7, the brake block guide plate 9, the left end plate 10 and the brake block seat plate 14 are connected together by screws to form a brake block seat. The limit block 8 is fixed on the brake block guide plate 9 to protect the guide post 17. When the internal tooth grooves are engaged with the external tooth grooves, the left brake block 1 and the right brake block 2 abut against the limit block 8. When the piston rod assembly is in the retracted state, the left brake block 1 abuts against the left end plate 10, and the right brake block 2 abuts against the right end plate 7.

[0028] Uniform annular tooth grooves are distributed on the inner holes of the left brake block 1 and the right brake block 2 and the outer circle of the guide post 17, as Figure 2 shown. The contact surface of the tooth groove is perpendicular to the axis of the guide post, and the non-contact surface forms a 45° angle with the axis of the guide post. Such a structure can ensure the strength of the tooth groove.

[0029] The brake locking system is fixed on the clamping die piston rod assembly 16 of the die clamping oil cylinder system through the brake block seat plate 14.

[0030] The die clamping oil cylinder system is fixed on the moving template 18 through the die clamping cylinder body assembly 15, and the guide post 17 passes through the middle of the clamping die piston rod.

[0031] The piston rod assembly 5 is provided with a front end step, and the inner part of the oil cylinder body assembly 6 is provided with a groove matching with the front end step. The front end step is for buffering to prevent the brake block from hitting the limit block 8.

[0032] The piston rod assembly 5 is provided with a rear end step, and the inner part of the oil cylinder body assembly 6 is provided with a groove matching with the rear end step. The rear end step is also for buffering to prevent the brake block from hitting the right end plate 7 and the left end plate 10 of the limit.

[0033] A locking cavity A and a releasing cavity B are formed between the oil cylinder body assembly 6 and the piston rod assembly 5; a die clamping cavity C and a mold opening cavity D are formed between the die clamping cylinder body assembly 15 and the die clamping piston rod assembly 16.

[0034] The operating principle of the die clamping mechanism for a low-pressure casting and forging composite casting machine:

[0035] 1. The hydraulic oil enters from the brake locking cavity A, pushes the piston rod assembly 5 and drives the right brake block 2 to move leftward. At the same time, it pushes the oil cylinder body assembly 6 to drive the left brake block 1 to move rightward. When it touches the limit block 8, the die clamping limit switch 12 sends a signal to the die clamping valve, and at the same time, the oil supply to the locking cavity stops, and the braking ends. At this time, the tooth grooves of the brake block are completely engaged with the tooth grooves of the guide post, making the die clamping piston rod assembly 16 and the guide post 17 become an integral body.

[0036] 2. After receiving the signal sent by the die clamping limit switch 12, the die clamping valve opens the die clamping oil circuit to make the die clamping cavity C enter oil and the mold opening cavity D return oil. Since the mold 19 on the moving template 18 has been closed and cannot move downward, the die clamping piston rod assembly 16 can only move upward, driving the brake block to move upward at the same time, resulting in a die clamping force on the guide post 17.

[0037] 3. When the casting time is up, the control system sends a signal to the mold opening valve, the mold opening oil circuit is opened to allow oil to enter the mold opening cavity D and the mold clamping cavity C to return oil, the pressure in the mold clamping cavity C is relieved, the guide posts 17 release the mold clamping force, and at the same time, the mold clamping piston rod assembly 16 drives the brake block to move down to the original position, creating a gap of 0.5 - 1 mm between the tooth grooves of the brake block and the guide posts, and sending a signal through the position switch on the mold clamping piston rod assembly 16.

[0038] 4. After the brake hydraulic valve receives the signal from the mold opening position switch, the brake release oil circuit is opened to allow oil to enter the release cavity B and the locking cavity A to return oil, pushing the piston rod assembly 5 and driving the right brake block 2 to move to the right, and at the same time driving the oil cylinder body assembly 6 to drive the left brake block 1 to move to the left; when the right brake block 2 touches the right end cover 7 and the left brake block 1 touches the left end cover 10, the mold opening limit switch 13 sends a signal, the oil supply to the release cavity stops, and the brake release ends. At this time, the tooth grooves of the brake block are completely disengaged from the tooth grooves of the guide posts, and at the same time, the mold opening limit switch 13 sends a signal to the mold moving valve for the next action.

[0039] Embodiment 2: As Figure 6 shown, a low-pressure casting and forging composite casting machine using the above mold clamping mechanism in this embodiment has a two-plate structure. A casting and forging module is provided on the moving template, and below the moving template is the mold 19. The casting and forging module includes a casting and forging oil cylinder, a casting and forging piston rod, and a casting and forging punch. The casting and forging punch includes a sealing section that isolates the mold liquid inlet and a pressing section located above the sealing section with a diameter larger than that of the sealing section. Below the mold 19 is the static template.

[0040] The above embodiments are only for illustrating the technical idea of the present invention and cannot be used to limit the protection scope of the present invention. Any modification made on the basis of the technical solution according to the technical idea proposed by the present invention falls within the protection scope of the present invention.

Claims

1. A die-locking mechanism for a low-pressure casting and forging compound casting machine, characterized in that: The brake locking system includes a left brake block, a right brake block, a connecting rod, a connecting plate, a piston rod assembly, an oil cylinder body assembly, a brake block guide plate, and a brake block seat plate; the die locking oil cylinder system includes a die locking cylinder body assembly and a die locking piston rod assembly; The left brake block, the connecting rod, and the connecting plate are connected to the oil cylinder body assembly, the right brake block is connected to the piston rod assembly, and the brake block guide plate is connected to the brake block seat plate; Uniform internal tooth grooves are distributed in the inner holes of the left brake block and the right brake block, and external tooth grooves capable of meshing with the internal tooth grooves are distributed on the outer circle of the guide post; The brake locking system is fixed to the die locking piston rod assembly of the die locking oil cylinder system through the brake block seat plate; The die locking oil cylinder system is fixed to the moving template through the die locking cylinder body assembly, and the guide post passes through the middle of the die locking piston rod.

2. The die locking mechanism for a low-pressure casting and forging compound casting machine according to claim 1, wherein: The contact surface between the internal tooth groove and the external tooth groove is perpendicular to the axis of the guide post, and the non-contact surface forms an angle of 30 - 60° with the axis of the guide post.

3. The die locking mechanism for a low-pressure casting and forging compound casting machine according to claim 1, wherein: A limiting block is fixed on the brake block guide plate. When the internal tooth groove meshes with the external tooth groove, the left brake block and the right brake block abut against the limiting block.

4. The die locking mechanism for a low-pressure casting and forging compound casting machine according to claim 3, wherein: The piston rod assembly is provided with a front-end step, and a groove matching with the front-end step is arranged inside the oil cylinder body assembly.

5. The die locking mechanism for a low-pressure casting and forging compound casting machine according to any one of claims 1, 3, and 4, wherein: The brake locking system further includes a right end plate and a left end plate; the right end plate, the brake block guide plate, and the left end plate are connected to the brake block seat plate to form a brake block seat; when the piston rod assembly is in the retracted state, the left brake block abuts against the left end plate, and the right brake block abuts against the right end plate.

6. The die locking mechanism for a low-pressure casting and forging compound casting machine according to claim 5, wherein: The piston rod assembly (5) is provided with a rear-end step, and a groove matching with the rear-end step is arranged inside the oil cylinder body assembly (6).

7. The die locking mechanism for a low-pressure casting and forging compound casting machine according to claim 1, wherein: The die locking limit switch (12) and the mold opening limit switch (13) are fixed on the oil cylinder body assembly (6); the limit switch rod (11) is connected to the right brake block (2); when the die locking piston rod assembly (16) is in the extended state, the limit switch rod (11) contacts the die locking limit switch (12); when the die locking piston rod assembly (16) is in the contracted state, the limit switch rod (11) contacts the die locking limit switch (12).

8. The die locking mechanism for a low-pressure casting and forging compound casting machine according to claim 1, wherein: A locking cavity A and a release cavity B are formed between the oil cylinder body assembly (6) and the piston rod assembly (5).

9. The die locking mechanism for a low-pressure casting and forging compound casting machine according to claim 1, wherein: A die locking cavity C and a mold opening cavity D are formed between the die locking cylinder body assembly (15) and the die locking piston rod assembly (16).

10. A low-pressure casting and forging composite casting machine using the mode-locking mechanism according to any one of claims 1-9, characterized in that: The moving template is provided with a forging module. Below the moving template is a mold. The forging module includes a forging oil cylinder, a forging piston rod and a forging punch. The forging punch includes a sealing section that isolates the mold liquid inlet, and a pressing section located above the sealing section and having a diameter larger than that of the sealing section. Below the mold is a stationary template.

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