Core making machine clamping jaw for clamping sand core

Abstract

The utility model relates to the technical field of core-making machines, in particular to a core-making machine claw for clamping a sand core, which comprises two claw bodies fixed on a manipulator, inclined V-shaped grooves are arranged on the inner sides of the claw bodies, at least three groups of V-shaped bulges distributed along the inclined direction are parallelly and integrally arranged on the surfaces of the V-shaped grooves, and the V-shaped bulges are arranged on the surfaces of the V-shaped grooves. The cross section of the V-shaped protrusion is in a symmetrical arc shape, the V-shaped protrusion is used for clamping the core head, the core head is clamped through the V-shaped protrusion, curved surface contact is changed into point contact, grabbing force is increased, the phenomenon that a sand core slips due to the fact that the sand core is not firmly grabbed can be effectively prevented, and damage caused by falling of the sand core is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of core-making machines, and particularly relates to a core-making machine jaw for clamping sand cores. Background Art

[0002] As Figure 1 Shown in the figure is a brake disc sand core processed by an existing core-making machine, the top of the middle part of which is a frustum-shaped core head and is clamped and transported by a manipulator on the core-making machine. Two block-shaped jaw bodies are fixed on the manipulator, and a concave curved surface is arranged inside the jaw body, and the curved surface is matched with the curved surface of the core head. When the two jaw bodies clamp the core head, the contact part between the existing jaw body and the core head is a curved surface structure, and it is easy to slip during core gripping, resulting in the sand core falling and breaking, increasing the production cost and reducing the production efficiency.

[0003] Therefore, it is urgent to improve the structure of the jaw body to enhance the clamping force of the jaw body on the brake disc sand core. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the defects and deficiencies existing in the prior art. Therefore, the utility model provides a core-making machine jaw for clamping sand cores, which can improve the gripping force and effectively prevent the problem of the sand core slipping and breaking.

[0005] To achieve the above purpose, the utility model provides a core-making machine jaw for clamping sand cores, including two jaw bodies fixed on a manipulator. An inclined V-shaped groove is arranged inside the jaw body, and at least three groups of V-shaped protrusions distributed along the inclined direction are integrally arranged on the surface of the V-shaped groove. The cross-section of the V-shaped protrusion is a symmetric arc, and the V-shaped protrusion is used for clamping the core head.

[0006] Further, the included angle between the horizontal plane of the V-shaped groove is β, and β = 130° ± 0.5°.

[0007] Further, the height of the V-shaped protrusion is 1mm ± 0.1mm.

[0008] Further, the jaw body is a rectangular block.

[0009] Further, the bottom line of the V-shaped groove is close to the front end of the jaw body; a chamfering part is arranged inside the rear end of the jaw body.

[0010] Further, the number of the V-shaped protrusions is three groups.

[0011] Further, the three groups of V-shaped protrusions are located in the 3 / 4 area at the top of the core head.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: The V-shaped protrusions on the V-shaped groove can quickly position the core head. At the same time, the V-shaped protrusions are in point contact with the core head, increasing the clamping force and enabling stable clamping of the brake disc core. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic cross-sectional structure diagram of the existing brake disc core.

[0014] Figure 2 It is a schematic structure diagram of the present utility model.

[0015] Figure 3 It is a top view of the present utility model in the use state.

[0016] Figure 4 It is a schematic cross-sectional view of the present utility model in the use state.

[0017] Wherein: 1. Claw body; 2. V-shaped groove; 3. V-shaped protrusion; 4. Chamfered part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. Embodiment

[0020] Please refer to Figures 2 to 4 , the present utility model provides a friction winch, including two claw bodies 1 fixed on the manipulator. Among them, an inclined V-shaped groove 2 is provided inside the claw body 1, and at least three groups of V-shaped protrusions 3 distributed along the inclined direction are integrally provided on the surface of the V-shaped groove 2. The cross-section of the V-shaped protrusion 3 is a symmetric arc. When in use, the core head is clamped by the V-shaped protrusion 3, changing from surface contact to point contact, increasing the grasping force, effectively preventing the slippage phenomenon caused by the sand core not being firmly grasped, and reducing the breakage caused by the sand core falling.

[0021] The horizontal plane included angle of the above V-shaped groove 2 is β, and β is preferably 130° ± 0.5°. Secondly, the height of the V-shaped protrusion 3 is preferably 1 mm ± 0.1 mm.

[0022] As an embodiment of the present utility model, the jaw body 1 is a rectangular block.

[0023] The bottom line of the V-shaped groove 2 here can be close to the front end of the jaw body 1; correspondingly, a chamfered portion 4 is provided on the inner side of the rear end of the jaw body 1 to ensure the stability of the grasping force.

[0024] The number of the V-shaped protrusions 3 here is preferably three groups. As Figure 4 shown, the three groups of V-shaped protrusions 3 are located in the 3 / 4 area at the top of the core head, that is, there is a spacing between the jaw body 1 and the brake disc sand core, which can avoid knocking the brake disc sand core while ensuring stable clamping of the brake disc sand core.

[0025] As Figure 3 shown, the manipulator on the existing core making machine uses a finger cylinder, and the finger cylinder moves through the linkage mechanism on the core making machine, while the present utility model is bolted and fixed on the existing finger cylinder to realize the clamping of the brake disc sand core by the two jaw bodies 1. The finger cylinder here can also be replaced by other forms of two-finger manipulators, which will not be elaborated herein.

[0026] The present utility model can be outlined in other specific forms that do not violate the spirit or main features of the present utility model. Therefore, from any point of view, the above embodiments of the present utility model can only be considered as an explanation of the present utility model and cannot limit the present utility model. The claims point out the scope of the present utility model, while the above description does not point out the scope of the present utility model. Therefore, any change within the meaning and scope equivalent to the claims of the present utility model should be considered as being included within the scope of the claims of the present utility model.

Claims

1. A core making machine clamp for clamping sand cores, comprising two clamp bodies (1) fixed on a manipulator, characterized in that: An inclined V-shaped groove (2) is provided on the inner side of the clamping claw body (1); at least three groups of V-shaped protrusions (3) distributed along the inclined direction are provided in parallel on the surface of the V-shaped groove (2); the cross section of the V-shaped protrusion (3) is a symmetrical arc; and the V-shaped protrusion (3) is used to clamp a core head.

2. The core making machine clamping jaw for clamping sand cores according to claim 1, characterized in that: The horizontal plane included angle of the V-shaped groove (2) is β, β=130°±0.5°.

3. The core making machine clamping jaw for clamping sand cores according to claim 2, characterized in that: The height of the V-shaped protrusion (3) is 1 mm±0.1 mm.

4. The core making machine clamping jaw for clamping sand cores according to claim 3, characterized in that: The claw body (1) is a rectangular block.

5. The core making machine clamping jaw for clamping sand cores according to claim 4, characterized in that: The bottom line of the V-shaped groove (2) is close to the front end of the claw body (1); and a chamfered portion (4) is provided on the inner side of the rear end of the claw body (1).

6. The core making machine clamping jaw for clamping sand cores according to claim 5, characterized in that: The number of the V-shaped protrusions (3) is three groups.

7. The core making machine clamping jaw for clamping sand cores according to claim 6, characterized in that: The three groups of V-shaped protrusions (3) are located in the 3 / 4 area of ​​the top of the core head.

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