Sand core structure for cylinder cover casting tappet hole precasting and precasting method

A technology of tappet hole and sand core, which is applied in the field of cylinder head manufacturing, can solve the problems of high manufacturing cost, achieve the effects of reducing molten iron consumption, reducing porosity waste products, and reducing porosity tendency

Pending Publication Date: 2022-07-15
CHINA FIRST AUTOMOBILE +1
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the purpose of one or more embodiments of this specification is to propose a sand core structure and a pre-casting method for pre-casting tappet holes of cylinder head castings to solve the problem of high manufacturing costs

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  • Sand core structure for cylinder cover casting tappet hole precasting and precasting method
  • Sand core structure for cylinder cover casting tappet hole precasting and precasting method
  • Sand core structure for cylinder cover casting tappet hole precasting and precasting method

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Embodiment Construction

[0030] In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below with reference to the specific embodiments and the accompanying drawings.

[0031] It should be noted that, unless otherwise defined, the technical or scientific terms used in one or more embodiments of the present specification shall have the usual meanings understood by those with ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and similar terms used in one or more embodiments of this specification do not denote any order, quantity, or importance, but are merely used to distinguish the various components. "Comprises" or "comprising" and similar words mean that the elements or things appearing before the word encompass the elements or things recited after the word and their equivalents, but do not exclude other elements or things. Words like "connected" or "connec...

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Abstract

The invention provides a sand core structure for cylinder cover casting tappet hole precasting and a precasting method. The sand core structure comprises a tappet hole sand core used for forming a casting tappet hole and a supporting sand core used for supporting the tappet hole sand core. The supporting sand cores are distributed and connected to the base core at intervals, the supporting sand cores are arranged on the base core in an embedded mode, and the upper surfaces of the supporting sand cores and the base core are located on the same horizontal plane; at least two tappet hole sand cores are obliquely arranged on the supporting sand core, and a set included angle is formed between the inclination angle of the at least two tappet hole sand cores and the ground plane. The tappet hole sand core is additionally arranged, the tappet hole structure is achieved in a pre-casting mode, and the problem of high cost caused by machining is solved; in addition, the invention further provides a precasting method, the tappet hole position machining allowance is omitted, and molten iron consumption is reduced.

Description

technical field [0001] One or more embodiments of this specification relate to the technical field of cylinder head manufacturing, and in particular, to a sand core structure and a pre-casting method for pre-casting tappet holes of a cylinder head casting. Background technique [0002] As we all know, the tappet is mainly an auxiliary device to control the opening and closing of the engine valve. figure 1 and figure 2 It can be seen from the 9L cylinder head that the tappet holes of the 9L cylinder head are all solid cast, and then the process of 12 tappet holes is completed by machining. The tappet holes of the cylinder head are realized by machining, and the manufacturing cost is high. By pre-casting the tappet hole, the machining allowance of the tappet hole can be eliminated and the consumption of molten iron can be reduced. [0003] However, the difficulty of tappet hole pre-casting is: 1. The dimensional accuracy requirements are high, reaching CT7 or above, and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/10B22C1/00B22C9/02B22C9/22
CPCB22C9/103B22C1/00B22C9/02B22C9/22
Inventor 杨磊李连杰杨敏
Owner CHINA FIRST AUTOMOBILE
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