Quenching inductor for concave spherical surface of scraper knife connecting seat and determination method of matched size

Abstract

The invention belongs to the technical field of induction heat treatment, and relates to a quenching inductor for a concave spherical surface of a scraper knife connecting seat and a determination method of matched size. The quenching inductor for concave spherical surface of a scraper knife connecting seat comprises a sensor matrix component (3) and an induction coil assembly (4) capable of spraying water, and the two are welded into a whole at a joint (gamma)of the two components; and the induction coil assembly (4) capable of spraying water is provided with a plurality of quenching water holes (Zeta). The invention solves the problem of improvement of induction heating efficiency and influence of ring effect, not only ensures cooling water for the quenching inductor, but also solves the problem of cooling medium required for induction quenching of the concave spherical surface; besides, the invention solves the problem of determining matched sizes required by the quenching inductor, such as effective induction arc end width, effective induction arc radius, a distance between the two round pipe joints and round pipe diameter. The invention realizes easy manufacture and convenient use of the quenching inductor, and more effective control on quality of the induction quenching.

Description

technical field [0001] The invention belongs to the technical field of induction heat treatment, and relates to a quenching inductor used for a concave spherical surface of a connecting seat of a shovel blade and a matching size determination method. Background technique [0002] Known, the bulldozer blade is driven by the power of the oil cylinder on the bulldozer through the blade connecting seat and cooperates to realize the required universal rotation function of the blade. The blade connection seat is a general term for a combination, including an upper cover "with a concave spherical surface" and a lower seat "with a concave spherical surface", and the two are connected as a whole with connecting bolts. [0003] The following is an example of a blade connecting seat used in a bulldozer, and a brief description of its structure, as follows: [0004] 1. The upper cover 1 of the blade connecting seat. Depend on figure 1 , figure 2 It is known that on the shovel conne...

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Problems solved by technology

[0010]The disadvantage of this method is that the hardness of parts that do not need to be hardened other than the concave spherical surface is too high after quenching, which is difficult to meet the actual use requirements

[0012] The disadvantage of this method is that the flame heating time, heating distance, moving speed and distance are manually operated according to the operator's experience, and the heating temperature, heating speed and precise heating position are difficult to control, which makes the quenching hardness and hardened layer of the concave spherical surface The depth and uniformity of quenching are difficult to meet the requirements of use, and improper operation may even cause concave spherical cracks, resulting in the scrapping of the blade connection seat

[0014] 1. Sharp corner effect is unavoidable

Depend on figure 1 , figure 2 , image 3 , Figure 4 It is known that when induction hardening is carried out, α1 at the front sharp corner of the upper cover, α2 at the rear sharp corner of the upper cover, β1 at the front sharp corner of the lower seat, and β2 at the rear sharp corner of the lower seat of the blade connection seat are prone to sharp corner effects , that is, the current at the sharp corners tends to be dense, resulting in overheating or overburning, and even quenching cracks

[0015]2. The sensing distance is difficult to control

[0016]3. Low-speed rotation is difficult to achieve

[0020] 2. When the inner space of the concave spherical surface of the blade connection seat is narrow, how to implement induction quenching cooling by means of a quenching sensor, that is, to provide a quenching cooling medium for cooling;

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