Magnetic powder core bonding device for electromagnet

Abstract

The utility model provides a magnetic powder core bonding device for an electromagnet, which belongs to the field of electromagnets and comprises an outer frame, a side plate, a push plate and an elastic piece. The spliced square large magnetic core is accommodated in an inner cavity defined by the outer frame; at least two adjacent side surfaces of the outer frame are detachably and fixedly connected with the side plates, and when the side plates are fixedly connected with the outer frame, the side plates are parallel to the side surfaces of the spliced square large magnetic core; the push plate is positioned between the side plate and the spliced square large magnetic core and is parallel to the side plate; the elastic piece is arranged between the side plate and the push plate, and when the side plate is fixedly connected with the outer frame, the elastic piece is in a compressed state and pushes the push plate to extrude the spliced square large magnetic core. The magnetic core bonding device solves at least one technical problem existing in magnetic core bonding, and has the advantages that continuous pressure can be provided, it is guaranteed that air gaps between blocks are kept to be the minimum value, and the bonding effect is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of electromagnets, and particularly relates to an adhesive device for magnetic powder cores used in electromagnets. Background Art

[0002] Traditional magnetic core materials for electromagnets use soft magnetic materials such as silicon steel. In special scenarios, metal powders need to be selected as the magnetic conductive cores. After the metal powders are coated and pressed into shape, they are heat-treated to enhance hardness and made into blocks. The electromagnet cores need to use multiple small cores for splicing, and epoxy glue is used to bond the individual small cores into a large core to meet the size requirements.

[0003] The electromagnet core is limited by hydraulic equipment and cannot be made into large sizes. It is necessary to bond multiple small cores to form a large core. In addition, there are several important technical concerns in core bonding: after the core is coated with glue, it needs to be baked and heated for a period of time. During the baking process, continuous pressure needs to be applied to the glue seam position to reduce the air gap between blocks and ensure tight bonding without cracking; the large core formed after bonding is a cuboid, and it is necessary to ensure the flatness of six surfaces and the parallelism of two opposite surfaces; during the bonding process, it is necessary to avoid core bumping and damage as much as possible; the bonded core is heavy, and the tooling needs to be convenient for manual operation; the bonding tooling needs to prevent the tooling from sticking to the core and facilitate disassembly. Therefore, there is no special adhesive forming tooling for magnetic powder cores used in electromagnets on the market currently. Summary of the Utility Model

[0004] The details of one or more embodiments of the utility model are set forth in the following drawings and description to make other features, objects, and advantages of the present application more concise and understandable.

[0005] The utility model provides an adhesive device for magnetic powder cores used in electromagnets, which solves at least one of the technical problems existing in the above-mentioned core bonding, and has the characteristics of being able to provide continuous pressure, ensuring that the air gap between blocks remains at the minimum value, and guaranteeing the bonding effect.

[0006] The utility model discloses an adhesive device for magnetic powder cores used in electromagnets, including an outer frame, side plates, a push plate, and elastic members; the inner cavity surrounded by the outer frame accommodates the spliced square large core; at least two adjacent sides of the outer frame are detachably and fixedly connected to the side plates, and when the side plates are fixedly connected to the outer frame, the side plates are arranged parallel to the side surface of the spliced square large core; the push plate is located between the side plates and the spliced square large core and is arranged parallel to the side plates; the elastic members are arranged between the side plates and the push plate, and when the side plates are fixedly connected to the outer frame, the elastic members are in a compressed state and push the push plate to squeeze towards the spliced square large core.

[0007] In some of these embodiments, two adjacent sides of the outer frame are detachably and fixedly connected to the side plates, and the other two adjacent sides of the outer frame are fixedly connected with fixing plates, and the fixing plates are in contact with the sides of the spliced large square magnetic core.

[0008] In some of these embodiments, the elastic member is a spring.

[0009] In some of these embodiments, it further includes a guide post fixedly connected to the push plate. The guide post passes through the side plate through a pin hole formed in the side plate, and the spring is sleeved on the guide post.

[0010] In some of these embodiments, the side plate is detachably and fixedly connected to the outer frame by an internal hexagon screw.

[0011] In some of these embodiments, it further includes a bottom plate provided at the bottom of the outer frame.

[0012] In some of these embodiments, the electromagnetic magnet powder core bonding device is provided with a slot at a position in contact with the glue seam of the spliced large square magnetic core.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] The present utility model provides an electromagnetic magnet powder core bonding device. Each magnetic core has three bonding contact surfaces. The bonding contact surface at the top of the magnetic core relies on gravity and a pressing block to maintain the pressure during bonding. The other two bonding contact surfaces perpendicular to the horizontal plane rely on an elastic member to transmit to the push plate to give continuous pressure to the bonding contact surface of the magnetic core. The inter-block glue layer will become thinner during the heating and curing process. The amount of expansion and contraction of the spring is used to control the pressure size and provide continuous pressure to ensure that the inter-block air gap remains at the minimum value, guaranteeing the bonding effect and the parallelism of the opposite two surfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0016] Figure 1 is a schematic structural diagram of the electromagnetic magnet powder core bonding device provided by the embodiment of the present utility model;

[0017] Figure 2 is another angle structural diagram of the electromagnetic magnet powder core bonding device provided by the embodiment of the present utility model;

[0018] Figure 3 is a three-dimensional view of the electromagnetic magnet powder core bonding device provided by the embodiment of the present utility model;

[0019] In the above figures: 1. Outer frame; 2. Side plate; 3. Pushing plate; 4. Elastic member; 5. Allen screw; 6. Guide post. Detailed implementation mode

[0020] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be described and explained below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. Based on the embodiments provided by the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present utility model.

[0021] The embodiment of the present utility model provides an adhesive device for magnetic powder cores of electromagnets. Figures 1-3 It is a schematic structural diagram of an adhesive device for magnetic powder cores of electromagnets according to an embodiment of the present utility model. Refer to Figures 1-3 As shown, the device at least includes an outer frame 1, a side plate 2, a pushing plate 3, and an elastic member 4; the inner cavity surrounded by the outer frame 1 accommodates the spliced large square magnetic core; at least two adjacent sides of the outer frame 1 are detachably and fixedly connected to the side plate 2, and when the side plate 2 is fixedly connected to the outer frame 1, the side plate 2 is arranged parallel to the side of the spliced large square magnetic core; the pushing plate 3 is located between the side plate 2 and the spliced large square magnetic core and is arranged parallel to the side plate 2; the elastic member 4 is arranged between the side plate 2 and the pushing plate 3. When the side plate 2 is fixedly connected to the outer frame 1, the elastic member 4 is in a compressed state and pushes the pushing plate 3 to squeeze towards the spliced large square magnetic core. The adhesive device for magnetic powder cores of electromagnets makes the two adhesive contact surfaces perpendicular to the horizontal plane transmit to the pushing plate 3 through the elastic member 4 to give continuous pressure to the magnetic core adhesive contact surface. The inter-block adhesive layer will become thinner during the heating and curing process. The pressure size is controlled by the telescopic amount of the spring, and continuous pressure is provided to ensure that the inter-block air gap remains at the minimum value, ensuring the bonding effect and the parallelism of the two opposite surfaces. The adhesive contact surface at the top of the magnetic core relies on gravity and the pressing block to maintain the pressure during bonding, ensuring the bonding effect of the adhesive contact surfaces of the three surfaces.

[0022] In order to ensure the bonding effect and simplify the structure at the same time, two adjacent sides of the outer frame 1 are detachably and fixedly connected to the side plate 2, and fixed plates are fixedly connected to the other two adjacent sides of the outer frame 1, and the fixed plates are in contact with the sides of the spliced large square magnetic core.

[0023] In some of the embodiments, the elastic member 4 is a spring. The spring length can be adjusted and replaced to bond magnetic cores of different sizes, so that the device is applicable to bonding magnetic cores of various specifications.

[0024] Further, it also includes a guide post 6 fixedly connected to the push plate 3. The guide post 6 passes through the side plate 2 through a pin hole opened on the side plate 2, and a spring is sleeved on the guide post 6. Further, both ends of the spring are in contact with the side plate 2 and the push plate 3. Six guide shafts (guide posts) are fixed on the push plate 3, and a rectangular spring is sleeved on each guide shaft. Its function is that the magnetic core squeezes the push plate 3, the displacement of the push plate 3 is converted into the deformation of the spring, and after the spring shrinks, it generates an elastic force, and the elastic force is transmitted to the push 3 to apply a continuous thrust to the magnetic core, so that the glue joint fits. It should be noted that the length of the guide post 6 is greater than the natural length of the spring in the non-extruded state, so as to better ensure the guiding effect for the telescopic movement of the spring.

[0025] To improve the assembly efficiency and ensure the simplicity of disassembly and installation, the side plate 2 is detachably and fixedly connected to the outer frame 1 through an internal hexagon screw 5.

[0026] In some embodiments, it also includes a bottom plate provided at the bottom of the outer frame 1.

[0027] In order to prevent the overflowing glue from contacting the tooling and ensure that the tooling cannot be bonded to the magnetic core, the electromagnetic iron magnetic powder core bonding device is provided with a slot at the position where it contacts the glue joint of the spliced large square magnetic core.

[0028] Further, the above-mentioned electromagnetic iron magnetic powder core bonding device is made of carbon steel, which is convenient for transporting by lifting magnets, reducing the risk of manual transportation; the bonded and baked product obtained by using the above-mentioned device provided by the present utility model has a uniform glue joint, high bonding strength, good flatness of the magnetic core, reducing the internal stress of the magnetic core; the air gap between the magnetic core blocks is small, reducing the change in the magnetic permeability of the electromagnetic iron and lowering the excitation power of the electromagnetic iron.

[0029] The working process of the above-mentioned electromagnetic iron magnetic powder core bonding device is as follows:

[0030] Place the spliced large square magnetic core in the inner cavity surrounded by the outer frame 1, and fix the side plates 2 on two adjacent sides of the outer frame 1. At this time, the push plates 3 on these two sides apply a continuous pressure to the bonding contact surface of the magnetic core under the action of the elastic member 4. The glue layer between the blocks will become thinner during the heating and curing process. The size of the pressure is controlled by the telescopic amount of the spring, and a continuous pressure is provided to ensure that the air gap between the blocks remains at the minimum value, ensuring the bonding effect and the parallelism of the opposite two surfaces. The bonding contact surface at the top of the magnetic core relies on gravity and the pressing block to maintain the pressure during bonding, ensuring the bonding effect of the bonding contact surfaces of the three surfaces.

[0031] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0032] The above embodiments only illustrate several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A magnetic powder core bonding device for an electromagnet, characterized in that Comprising an outer frame, the inner cavity surrounded by the outer frame accommodating the spliced large square magnetic core; side plates, at least two adjacent sides of the outer frame being detachably and fixedly connected to the side plates, and when the side plates are fixedly connected to the outer frame, the side plates are arranged parallel to the sides of the spliced large square magnetic core; a push plate, the push plate being located between the side plates and the spliced large square magnetic core and arranged parallel to the side plates; an elastic member, the elastic member being arranged between the side plates and the push plate, and when the side plates are fixedly connected to the outer frame, the elastic member is in a compressed state and pushes the push plate to squeeze against the spliced large square magnetic core.

2. The magnetic powder core bonding device for an electromagnet according to claim 1, characterized in that, Two adjacent sides of the outer frame are detachably and fixedly connected to the side plates, and the other two adjacent sides of the outer frame are fixedly connected with fixing plates, and the fixing plates are in contact with the sides of the spliced large square magnetic core.

3. The magnetic powder core bonding device for an electromagnet according to claim 1, wherein The elastic member is a spring.

4. The magnetic powder core bonding device for an electromagnet according to claim 3, wherein, It further includes a guide post fixedly connected to the push plate, the guide post passing through the side plates through pin holes formed in the side plates, and the spring being sleeved on the guide post.

5. The magnetic powder core bonding device for an electromagnet according to claim 1, characterized in that, The side plates are detachably and fixedly connected to the outer frame by internal hexagonal screws.

6. The magnetic powder core bonding device for an electromagnet according to claim 1, characterized in that, It further includes a bottom plate arranged at the bottom of the outer frame.

7. The magnetic powder core bonding device for an electromagnet according to claim 1, characterized in that, The magnetic powder core bonding device for the electromagnet is provided with a slot at a position in contact with the glue seam of the spliced large square magnetic core.

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