Upward pressing tool for stator lamination welding

Abstract

The utility model provides an upward pressing tool for stator lamination welding, the upward pressing tool comprises a top plate, a pressing plate and a copper block, the top plate is arranged at the top of the pressing plate, a vertically through first channel is arranged in the pressing plate, the copper block is arranged at the lower part of the first channel, and an elastic part is arranged between the copper block and the top plate. The copper block floats up and down along the first channel under the action of the elastic part. According to the utility model, the problem of how to avoid a gap between the copper block and the upper end face of the stator lamination in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of stator lamination welding, in particular to an upper pressing tool for stator lamination welding. Background Art

[0002] Silicon steel sheet, also called silicon steel sheet, is a silicon-iron soft magnetic alloy with extremely low carbon content and a silicon content of 2.8-3.6%. Adding silicon to silicon steel can increase the resistivity and maximum magnetic permeability of iron, reduce coercive force, core loss (iron loss) and magnetic aging. Silicon steel sheets are mainly used to make iron cores for various transformers, motors and generators. The world's silicon steel sheet production accounts for about 1% of the total steel production. Generally, as the silicon content of silicon steel sheets increases, iron loss, punchability and magnetic induction decrease, and hardness increases. The higher the operating frequency, the greater the eddy current loss, and the thinner the selected silicon steel sheet should be. Currently, it is Baosteel B27AV1400, with a general thickness of 0.27mm.

[0003] However, the pressure plate and the copper block in the upper pressure tooling used for the stator laminations are currently connected and fixed as one. Laser welding of the silicon steel laminations will generate welding heat input and welding stress, which will lead to welding deformation of the stator laminations, making the upper end surface of the stator laminations and the contact surface of the copper block uneven. The laser will penetrate the end loose sheet surface of the stator laminations, the contact surface of the copper block and the end sheet of the stator laminations, resulting in a gap, forming an outer circular gap of about 0.2, which will affect the welding effect.

[0004] Therefore, how to avoid the formation of a gap between the copper block and the upper end surface of the stator lamination becomes a technical problem that needs to be solved. Utility Model Content

[0005] The utility model aims to provide a pressing tool for welding stator laminations, mainly to solve the problem of how to avoid the generation of gaps between copper blocks and the upper end faces of stator laminations in the above-mentioned prior art, and to provide a pressing tool for welding stator laminations.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a pressing tool for welding stator laminations, characterized in that: the pressing tool comprises a top plate, a pressing plate and a copper block, the top plate is arranged on the top of the pressing plate, a first channel which runs through the pressing plate from top to bottom is arranged inside the pressing plate, the copper block is located at the lower part of the first channel, an elastic part is arranged between the copper block and the top plate, and the copper block floats up and down along the first channel under the action of the elastic part.

[0007] Furthermore, a clamp for limiting the elastic part is provided on the pressure plate, and the elastic part corresponds to the inner side surface of the clamp.

[0008] Furthermore, the copper block is provided with an elliptical slot or a strip hole, and the screw is connected to the pressure plate after penetrating the elliptical slot or the strip hole; the top of the copper block is connected or abutted against the bottom of the elastic part; and the top of the elastic part is connected to the top plate.

[0009] Furthermore, the first channel is open at a location corresponding to the circumferential outer side of the pressing plate to form a first channel opening, and the first channel includes an upper groove for accommodating the elastic part and a lower groove for accommodating the copper block.

[0010] Furthermore, the upper groove is a circular hole with a diameter of 3 mm, the dimensions of the lower groove are 15 mm in height, 8 mm in length, and 7.2 mm in depth, and the dimensions of the copper block match those of the lower groove.

[0011] Furthermore, a concave arc surface is provided on the outer side surface of the copper block facing the opening of the first channel, and the lowest point of the concave arc surface is connected to the elliptical slot hole or the strip hole; the screw is a hexagonal countersunk screw, the depth of the concave arc surface is greater than the thickness of the head of the hexagonal countersunk screw, and the head of the hexagonal countersunk screw corresponds to or offsets the concave arc surface.

[0012] Furthermore, the elastic part is a spring.

[0013] Furthermore, the pressing plate is provided with 20 first channels, and the 20 first channels are evenly distributed at the circumferential outer edge of the pressing plate.

[0014] In view of the above technical features, the utility model has the following beneficial effects:

[0015] 1. In a pressing tool for welding stator laminations of the utility model, the copper block of the pressing tool can adaptively float up and down under the action of an elastic part (such as a spring), so as to make up for the gap between the stator laminations during welding caused by stress deformation, and ensure that each copper block can always fit the upper end surface of the stator lamination (that is, the copper block of the pressing tool is adaptively leveled with the end of the stator lamination at all times under the action of the spring pressure), so as to avoid the generation of a gap between the copper block and the upper end surface of the stator lamination, ensure the welding quality of the stator lamination, and effectively avoid the risk of breakdown and end gap caused by the welding of the stator laminations.

[0016] 2. In the upper pressing tooling for stator lamination welding of the utility model, the whole device has a simple structure, ingenious design, convenient operation and low cost.

[0017] 3. In the upper pressing tooling for stator lamination welding of the utility model, the risk of the spring falling off during the downward pressing process is effectively avoided through the clamp design. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an upper pressing tool for welding stator laminations in Example 1.

[0019] Figure 2 It is a structural schematic diagram of a press tool for welding stator laminations in Example 1 (excluding the top plate).

[0020] Figure 3 It is a schematic diagram of the structure of the pressure plate in Example 1.

[0021] Figure 4 It is a schematic diagram of the structure of the copper block in Example 1.

[0022] Figure 5 It is a partial cross-sectional view of a stator lamination welding in Example 1.

[0023] In the figure: 1, top plate; 2, pressure plate; 21, first channel; 211, upper groove; 212, lower groove; 22, countersunk hole; 3, copper block; 31, inner concave arc surface; 32, elliptical slot hole; 4, outer ring clamp; 5, hexagon socket countersunk screw; 6, spring. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

[0025] See also Figures 1 to 5 , Specific embodiment 1, this embodiment 1 provides a press tool for welding stator laminations, the so-called "press tool" is used above the stator laminations to press the stator laminations from top to bottom, the press tool comprises a top plate 1, a pressing plate 2 and a copper block 3, the top plate 1 is arranged on the top of the pressing plate 2, a first channel 21 is arranged inside the pressing plate 2, and the copper block 3 is located at the lower part of the first channel 21, an elastic part is arranged between the copper block 3 and the top plate 1, and the copper block 3 floats up and down along the first channel 21 under the action of the elastic part. Preferably, the elastic part is a spring 6. The top of the copper block 3 is connected or abutted against the bottom of the elastic part; the top of the elastic part is connected to the top plate 1.

[0026] The top plate 1 presses the top of the elastic part. When the upper pressing tool is pressed on the upper end surface of the stator lamination, the copper block 3 and the top plate 1 press the elastic part tightly, and the elastic part is in a compressed state. When the gap between the stator laminations during welding is caused by stress deformation, the copper block 3 can float up and down adaptively under the pressure of the spring 6 (that is, float up and down in the first channel 21, and the first channel 21 defines the floating trajectory of the copper block 3 in the vertical direction, that is, the vertical direction). Figure 3 In the middle Z-axis direction), the gap between the stator laminations caused by stress deformation during welding is compensated, and each copper block 3 can always fit the upper end surface of the stator lamination (that is, the copper block 3 of the upper pressing tool is adaptively leveled with the end of the stator lamination under the pressure of the spring 6), avoiding the generation of a gap between the copper block 3 and the upper end surface of the stator lamination, ensuring the welding quality of the stator lamination, and effectively avoiding the risk of breakdown and end gaps caused by stator lamination welding.

[0027] Preferably, the first channel 21 is open at the circumferential outer side surface of the pressure plate 2 to form an opening of the first channel 21. The first channel 21 includes an upper groove 211 for accommodating the elastic part and a lower groove 212 for accommodating the copper block 3, which is convenient for replacing the spring 6 and / or the copper block 3, and is also convenient for observing or checking whether each copper block 3 is tightly attached to the upper end surface of the stator lamination. The entire device has a simple structure, ingenious design, easy operation and low cost.

[0028] The copper block 3 is provided with an elliptical slot hole 32 or a strip hole, and the screw is connected to the pressing plate 2 after penetrating the elliptical slot hole 32 or the strip hole; the elliptical slot hole 32 or the strip hole of the copper block 3 is designed to cooperate with the screw, so that the copper block 3 and the pressing plate 2 can be connected in the horizontal direction (i.e. Figure 3 The connection and limitation of the plane formed by the X-axis and the Y-axis in the middle) will not affect the up and down floating of the copper block 3 in the vertical direction in the first channel 21 (that is, it is convenient for the copper block 3 to float up and down freely, and it is convenient for the copper block 3 to have better freedom to fit the upper end surface of the stator lamination in real time during the pressing process of the upper pressing tool). At the same time, the floating range of the copper block 3 in the vertical direction is limited to prevent the copper block 3 from slipping out of the first channel 21.

[0029] The outer side surface of the copper block 3 facing the opening of the first channel 21 is provided with an inner concave arc surface 31, and the lowest point of the inner concave arc surface 31 is connected to the elliptical slot hole 32 or the strip hole; the screw is a hexagon socket countersunk screw 5, and the depth of the inner concave arc surface 31 is greater than the thickness of the head of the hexagon socket countersunk screw 5, and the head of the hexagon socket countersunk screw 5 corresponds to or abuts against the inner concave arc surface 31. The inner hexagon socket countersunk screw 5 is connected to the pressure plate 2 after passing through the elliptical slot hole 32 or the strip hole, for example, the inner hexagon socket countersunk screw 5 is connected to the countersunk hole 22 in the groove 212 under the pressure plate 2, so as to prevent the copper block 3 from falling off during the pressing process, and can fix the copper block 3 and the pressure plate 2 without affecting the up and down floating of the copper block 3. The head of the inner hexagon socket countersunk screw 5 will not protrude from the outer peripheral surface of the pressure plate 2, and the overall appearance is more beautiful.

[0030] The upper groove 211 is a round hole with a diameter of 3 mm, suitable for the spring 6, and the lower groove 212 has a size of 15 mm in height, 8 mm in length, and 7.2 mm in depth, suitable for the copper block 3. Since the diameter of the upper groove 211 is smaller than the length and depth of the lower groove 212, the size of the spring 6 corresponds to the upper groove 211, and the size of the copper block 3 fits the shape of the lower groove 212. At this time, the spring 6 can enter the lower groove 212 to press the copper block 3, while the size of the copper block 3 is larger than the round hole of the upper groove 211 and cannot enter the upper groove 211. The bottom of the upper groove 211 limits the copper block 3, preventing the copper block 3 from detaching from the upper groove 211, and also preventing the copper block 3 from excessively squeezing the spring 6, thereby avoiding damage to the spring 6.

[0031] The pressing plate 2 is provided with 20 first channels 21 , which are evenly distributed at the circumferential outer edge of the pressing plate 2 and evenly pressed on the upper end surface of the stator laminations.

[0032] See also Figure 1 and Figure 5 , Specific embodiment 2, this embodiment 2 is different from embodiment 1 in that: a clamp 4 for limiting the elastic part is also provided on the pressure plate 2, and the elastic part corresponds to the inner side of the clamp. For example, the clamp 4 is provided on the outer edge of the pressure plate 2, and the spring 6 is coiled inside the clamp. In the process of pressing the stator lamination by the upper pressing tool, the clamp 4 limits the spring 6, which effectively avoids the risk of the spring 6 falling off during the pressing process, realizes the free adjustment and fixation of the spring, and is very flexible and convenient during use.

[0033] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A press tool for stator lamination welding, characterized in that: The upper pressing tool comprises a top plate (1), a pressing plate (2) and a copper block (3); the top plate (1) is arranged on the top of the pressing plate (2); a first channel (21) is provided inside the pressing plate (2) and runs vertically through; the copper block (3) is located at the lower part of the first channel (21); an elastic part is provided between the copper block (3) and the top plate (1); and the copper block (3) floats up and down along the first channel (21) under the action of the elastic part.

2. The pressing tool for stator lamination welding according to claim 1, characterized in that: A clamp (4) for limiting the position of the elastic part is also provided on the pressure plate (2), and the elastic part corresponds to the inner side surface of the clamp.

3. The pressing tool for stator lamination welding according to claim 2, characterized in that: The copper block (3) is provided with an elliptical slot hole (32) or a strip hole, and is connected to the pressing plate (2) after a screw penetrates the elliptical slot hole (32) or the strip hole; the top of the copper block (3) is connected to or abuts against the bottom of the elastic part; and the top of the elastic part is connected to the top plate (1).

4. The pressing tool for stator lamination welding according to claim 3, characterized in that: The first channel (21) is open at a location corresponding to the circumferential outer side surface of the pressing plate (2), forming an opening of the first channel (21). The first channel (21) comprises an upper groove (211) for accommodating the elastic portion and a lower groove (212) for accommodating the copper block (3).

5. The pressing tool for stator lamination welding according to claim 4, characterized in that: The upper groove (211) is a circular hole with a diameter of 3 mm, the lower groove (212) has a height of 15 mm, a length of 8 mm, and a depth of 7.2 mm, and the size of the copper block (3) matches that of the lower groove (212).

6. The pressing tool for stator lamination welding according to claim 4, characterized in that: The outer side surface of the copper block (3) facing the opening of the first channel (21) is provided with an inner concave arc surface (31), and the lowest point of the inner concave arc surface (31) is connected to the elliptical slot hole (32) or the strip hole; the screw is a hexagon socket countersunk screw (5), the depth of the inner concave arc surface (31) is greater than the thickness of the head of the hexagon socket countersunk screw (5), and the head of the hexagon socket countersunk screw (5) corresponds to or abuts against the inner concave arc surface (31).

7. A press-on tool for welding stator laminations according to any one of claims 1 to 6, characterized in that: The elastic part is a spring (6).

8. The pressing tool for stator lamination welding according to claim 7, characterized in that: The pressing plate (2) is provided with 20 first channels (21), and the 20 first channels (21) are evenly distributed at the circumferential outer edge of the pressing plate (2).

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