Stretching device

Abstract

The utility model discloses a stretching device which solves the technical problem that in the using process of a silicon steel stretching device in the prior art, the cooling efficiency of silicon steel is low. Comprising a clamping unit, a stretching unit, a heating piece and a cooling unit, the clamping unit comprises a first clamping assembly and a second clamping assembly; the stretching unit is provided with a stretching end connected to the first clamping assembly. The cooling unit is located between the first clamping assembly and the second clamping assembly and comprises a first cooling assembly and a second cooling assembly which are oppositely arranged. The first cooling assembly and the second cooling assembly each comprise a cooling block, the two cooling blocks are each provided with a first cooling channel and an inlet communicating with the first cooling channel, the two cooling blocks define a second cooling channel for silicon steel to pass through, and the second cooling channel communicates with the first cooling channel. The cooling unit plays a role in wrapping the silicon steel, the cooling efficiency of the silicon steel is improved through wrapping type cooling, and energy waste is reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of silicon steel production and processing, and specifically relates to a stretching device. Background Art

[0002] Silicon steel, also known as electrical steel, is a Fe-Si soft magnetic alloy. The mass percentage of Si in silicon steel is 0.4% to 6.5%. It has excellent magnetic properties with high magnetic permeability and low iron loss value, low core loss, high magnetic induction intensity, good punching properties, good steel plate surface quality, and good insulation film performance. Silicon steel is mainly used to prepare iron cores for various power equipment such as motors, generators and transformers. It is an indispensable metal functional material in the power, electronics and military industries, and is also a key material for improving the efficiency and reducing energy consumption of power equipment. As the soft magnetic alloy with the largest consumption, electrical steel is widely used in various aspects of the real economy. Improving its overall performance and manufacturing level plays a very important role and significance in the development of the national economy.

[0003] During the production process, silicon steel needs to be stretched to make it flat so as to adjust the shape. During the stretching process of silicon steel, it is necessary to heat and soften the silicon steel before stretching to enhance its plasticity, and then cool the silicon steel after stretching to stabilize its shape and achieve the effect of shaping after stretching. In the prior art, for example, a silicon steel stretching device with publication number CN217095052U is provided with a cold air generating mechanism to emit cold air. The cold air reaches the upper discharge port from the connecting channel and cools the silicon steel above. The upper discharge port is an open end with a large area, which will cause a large amount of cold air to be lost, and the cooling efficiency is low. Summary of the invention

[0004] In order to solve the technical problem of low cooling efficiency of silicon steel during the use of the current silicon steel stretching device, the present application provides a stretching device.

[0005] The present application provides a stretching device, comprising a clamping unit, a stretching unit, a heating element and a cooling unit;

[0006] The clamping unit comprises a first clamping assembly and a second clamping assembly for clamping two ends of the silicon steel respectively;

[0007] The stretching unit is provided with a stretching end connected to the first clamping assembly so that the first clamping assembly can reciprocate along the extension direction of the silicon steel;

[0008] The heating element is used to heat the silicon steel;

[0009] The cooling unit is located between the first clamping assembly and the second clamping assembly, and includes a first cooling assembly and a second cooling assembly arranged opposite to each other; the first cooling assembly and the second cooling assembly both include cooling blocks, and the two cooling blocks are both provided with a first cooling channel for the circulation of cooling medium and an inlet connected to the first cooling channel, and the two cooling blocks are butted to enclose a second cooling channel for the silicon steel gap to pass through, and the second cooling channel is connected to the first cooling channel.

[0010] In some embodiments, each of the cooling blocks is provided with an arc-shaped groove penetrating along the extension direction of the silicon steel, and the two arc-shaped grooves are arranged opposite to each other in a direction perpendicular to the extension direction of the silicon steel to enclose the second cylindrical cooling channel.

[0011] In some embodiments, the first cooling assembly and the second cooling assembly each include an arc-shaped plate, which is slidably connected to an arc-shaped groove of a corresponding cooling block, and one end of the arc-shaped plate may extend out of the cooling block or be located in the arc-shaped groove.

[0012] In some embodiments, the first cooling assembly and the second cooling assembly each include a first telescopic cylinder having a telescopic end connected to the arc plate; the telescopic end of the first telescopic cylinder reciprocates along an extension direction of the silicon steel and is connected to a cooling block or a clamping unit.

[0013] In some embodiments, the first cooling assembly and the second cooling assembly each include a power component and an air cooler that are sequentially connected to an inlet.

[0014] In some embodiments, the first cooling assembly and the second cooling assembly each include a driving unit, and the driving unit is connected to the cooling block.

[0015] In some embodiments, the first cooling assembly and the second cooling assembly both include a driving motor connected to the cooling block via a driving screw; the cooling block encloses a second cooling channel for passing the silicon steel; forward and reverse rotation of the screw causes the cooling block to move closer to or farther away from the driving motor.

[0016] In some embodiments, the drive motor is fixedly connected to the first support plate; a guide column is provided on a side of the cooling block close to the drive motor; and a guide groove matching the guide column is provided on a side of the first support plate close to the cooling block.

[0017] In some embodiments, it includes a base, the second clamping assembly is fixedly connected to the base, the first clamping assembly is slidably connected to the base, the stretching unit includes a plurality of second telescopic cylinders connected to the first clamping assembly, the fixed end of the second telescopic cylinder is connected to the base, and the telescopic end of the second telescopic cylinder constitutes the stretching end.

[0018] In some embodiments, the first clamping assembly and the second clamping assembly both include a clamping block and a third telescopic cylinder; the clamping block is provided with a first clamping channel for the silicon steel to pass through; the clamping block is provided with a second clamping channel connected to the first clamping channel and the outside of the clamping block; the telescopic end of the third telescopic cylinder penetrates into the second clamping channel to act on the silicon steel.

[0019] According to the stretching device provided in the embodiment of the present application, it includes a clamping unit, a stretching unit, a heating element and a cooling unit; the clamping unit includes a first clamping assembly and a second clamping assembly for clamping the two ends of the silicon steel respectively; the stretching unit is provided with a stretching end connected to the first clamping assembly so that the first clamping assembly can reciprocate along the extension direction of the silicon steel; the heating element is used to heat the silicon steel; the cooling unit is located between the first clamping assembly and the second clamping assembly, and includes a first cooling assembly and a second cooling assembly arranged oppositely; the first cooling assembly and the second cooling assembly both include cooling blocks, the two cooling blocks are provided with a first cooling channel for the circulation of cooling medium and an inlet connected to the first cooling channel, the two cooling blocks are butted to enclose a second cooling channel for the silicon steel gap to pass through, and the second cooling channel is connected to the first cooling channel;

[0020] The present application includes a first cooling component and a second cooling component that are relatively arranged, and the first cooling component and the second cooling component both include cooling blocks. The two cooling blocks are butted together to enclose a second cooling channel for the silicon steel gap to pass through, and the second cooling channel is for the silicon steel to pass through. The two cooling blocks are both provided with a first cooling channel for the circulation of a cooling medium and an inlet connected to the first cooling channel. The second cooling channel is connected to the first cooling channel, and the cooling medium supplied by an external cooling device can enter the second cooling channel from the first cooling channel, act on the silicon steel in the second cooling channel, and have a cooling effect on the silicon steel. At the same time, the two cooling blocks are butted together to enclose the second cooling channel, which has a wrapping effect on the silicon steel. Compared with the prior art, the cooling structure is an open end with a large area. The wrapping cooling of the present application increases the cooling efficiency of the silicon steel and reduces energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic structural diagram of a stretching device in an embodiment of the present application is shown.

[0022] Figure 2A schematic structural diagram is shown in which the stretching device in an embodiment of the present application omits the first cooling assembly and the driving unit corresponding to the first cooling assembly.

[0023] Figure 3 A schematic structural diagram of a second clamping assembly in an embodiment of the present application is shown.

[0024] Description of reference numerals:

[0025] 100. Clamping unit;

[0026] 110, first clamping assembly; 120, second clamping assembly;

[0027] 111. Clamping block; 112. Third telescopic cylinder; 113. Third supporting plate;

[0028] 200, stretching unit;

[0029] 210, second telescopic cylinder; 220, second supporting plate;

[0030] 300, heating element;

[0031] 400. Cooling unit;

[0032] 410, a first cooling assembly; 420, a second cooling assembly;

[0033] 411, cooling block; 412, arc plate; 413, first telescopic cylinder; 414, power member; 415, guide column;

[0034] 500, drive unit;

[0035] 510, driving screw; 520, driving motor; 530, first supporting plate; 540, guide groove;

[0036] 600, base;

[0037] 700. Silicon steel. DETAILED DESCRIPTION

[0038] In order to make the technical personnel in the technical field to which the present application belongs to understand the present application more clearly, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0039] An embodiment of the present application provides a stretching device to improve the cooling effect of silicon steel.

[0040] See also Figure 1as well as Figure 2 The stretching device provided in the embodiment of the present application includes a clamping unit 100, a stretching unit 200, a heating element 300 and a cooling assembly.

[0041] The clamping unit 100 includes a first clamping assembly 110 and a second clamping assembly 120 for clamping two ends of the silicon steel 700 respectively; in some embodiments, one end of the silicon steel 700 is clamped by the first clamping assembly 110 and the other end is clamped by the second clamping assembly 120.

[0042] The stretching unit 200 is provided with a stretching end connected to the first clamping assembly 110, so that the first clamping assembly 110 can reciprocate along the extension direction of the silicon steel 700; in some embodiments, the stretching unit 200 includes a telescopic cylinder, and the telescopic end of the telescopic cylinder is fixedly connected to the first clamping assembly 110, so that the first clamping assembly 110 can reciprocate along the telescopic direction of the telescopic cylinder.

[0043] The heating element 300 is used to heat the silicon steel 700 . In some embodiments, a heating wire is provided inside the heating element 300 , and a heating channel is provided for the silicon steel 700 to pass through. In some embodiments, the heating element 300 is close to the second clamping assembly 120 .

[0044] The cooling unit 400 is located between the first clamping assembly 110 and the second clamping assembly 120, and includes a first cooling assembly 410 and a second cooling assembly 420 that are arranged opposite to each other; the first cooling assembly 410 and the second cooling assembly 420 both include a cooling block 411, and the two cooling blocks 411 are both provided with a first cooling channel for the circulation of a cooling medium and an inlet connected to the first cooling channel, and the two cooling blocks 411 are butted together to enclose a second cooling channel for the silicon steel 700 to pass through the gap, and the second cooling channel is connected to the first cooling channel; in some embodiments, the cooling unit 400 includes two first cooling assemblies 410 and a second cooling assembly 420 that are identical in shape and size and are arranged opposite to each other; in some embodiments, the cooling medium is cold air.

[0045] In some embodiments, each cooling block 411 is provided with an arc groove extending along the extension direction of the silicon steel 700, and the two arc grooves are arranged opposite to each other in a direction perpendicular to the extension direction of the silicon steel 700 to enclose a cylindrical second cooling channel to provide an extension basis for the second cooling channel; in some embodiments, the cooling block 411 is a rectangular parallelepiped with a groove, and the groove extends along the length direction of the silicon steel 700; in some embodiments, the tops of the two cooling blocks 411 are provided with openings, and the openings lead to the grooves; in some embodiments, the grooves are semicircular grooves, and the two cooling blocks 411 enclose a cylindrical channel;

[0046] In some embodiments, the first cooling component 410 and the second cooling component 420 both include an arc plate 412, which is slidably connected to the arc groove of the corresponding cooling block 411, and one end of the arc plate 412 can extend out of the cooling block 411 or be located in the arc groove; in some embodiments, the arc plate 412 is a semicircular plate, and the two arc plates 412 are surrounded to form a column to form an extension channel of the second cooling channel.

[0047] In some embodiments, the first cooling component 410 and the second cooling component 420 both include a first telescopic cylinder 413 whose telescopic end is connected to the arc plate 412, and the telescopic end of the first telescopic cylinder 413 reciprocates along the extension direction of the silicon steel 700 and is connected to the cooling block 411 or the clamping unit 100 so that the arc plate 412 extends out or is located on the cooling block 411; in some embodiments, the first cooling component 410 or the second cooling component 420 includes a first telescopic cylinder 413 whose telescopic end is connected to the arc plate 412; in some embodiments, the telescopic cylinder of the first telescopic cylinder 413 is connected to the arc plate 412 via a connecting plate.

[0048] In some embodiments, the first cooling component 410 and the second cooling component 420 both include a power component 414 and an air conditioner connected to the inlet in sequence to provide cold air to the second cooling channel; in some embodiments, the first cooling component 410 and the second cooling component 420 are both connected to an air pump, and the air pump is connected to the air conditioner.

[0049] In some embodiments, the first cooling component 410 and the second cooling component 420 respectively include a driving unit 500, and the driving unit 500 is connected to the cooling block 411 so that the first cooling component 410 and the second cooling component 420 are closer to or farther away from each other; in some embodiments, the first cooling component 410 and the second cooling component 420 are respectively threadedly connected to the driving unit 500.

[0050] In some embodiments, the first cooling component 410 and the second cooling component 420 both include a driving motor 520 connected to a cooling block 411 via a driving screw 510; the cooling block 411 encloses a second cooling channel for passing through the silicon steel 700; the forward and reverse rotation of the driving screw 510 causes the cooling block 411 to approach or move away from the driving motor 520; in some embodiments, the first cooling component 410 and the second cooling component 420 are both provided with a connecting screw seat on the side away from the groove, the connecting screw seat is threadedly connected to the driving screw 510, and the driving screw 510 is connected to the driving motor 520; in some embodiments, the driving motor 520 is fixed on a first fixing seat, and the first fixing seat supports the driving motor 520; in some embodiments, the first cooling component 410 and the second cooling component 420 are respectively provided with two connecting screw seats.

[0051] In some embodiments, the driving motor 520 is fixedly connected to the first support plate 530; a guide column 415 is provided on the side of the cooling block 411 close to the driving motor 520; a guide groove 540 matching the guide column 415 is provided on the side of the first support plate 530 close to the cooling block 411 to provide a guiding function for the movement of the cooling block 411; in some embodiments, the guide column 415 is slidably connected to the guide groove 540.

[0052] In some embodiments, it includes a base 600, the second clamping assembly 120 is fixedly connected to the base 600, the first clamping assembly 110 is slidably connected to the base 600, the stretching unit 200 includes a plurality of second telescopic cylinders 210 connected to the first clamping assembly 110, the fixed ends of the second telescopic cylinders 210 are connected to the base 600, and the telescopic ends of the second telescopic cylinders 210 constitute the stretching ends to provide a fixed basis for each device; in some embodiments, the second clamping assembly 120 is spaced apart from the base 600.

[0053] See also Figure 3 In some embodiments, the first clamping assembly 110 and the second clamping assembly 120 both include a clamping block 111 and a third telescopic cylinder 112; the clamping block 111 is provided with a first clamping channel for the silicon steel 700 to pass through; the clamping block 111 is provided with a second clamping channel connected to the first clamping channel and the outer side of the clamping block 111; the telescopic end of the third telescopic cylinder 112 penetrates into the second clamping channel to act on the silicon steel 700 to clamp the silicon steel 700; in some embodiments, the second clamping channel connected to the first clamping channel and the outer side of the clamping block 111 is provided on both sides of the clamping block 111; in some embodiments, the fixed end of the third telescopic cylinder 112 is fixed to the outer side of the clamping block 111, and the telescopic rod of the third telescopic cylinder 112 extends into the second clamping channel to act on the silicon steel 700.

[0054] In some embodiments, the stretching unit 200 includes a second support plate 220 , and the second telescopic cylinder 210 includes a second fixing member and a second telescopic member; the second fixing member is connected to the second support plate 220 ; the second telescopic member passes through the second support plate 220 and acts on the first clamping assembly 110 .

[0055] In some embodiments, a plurality of second telescopic cylinders 210 are provided and are spaced apart along a direction perpendicular to the stretching direction of the silicon steel 700 so that the first clamping assembly 110 can move smoothly.

[0056] In some embodiments, the first clamping assembly 110 is fixedly connected to the third support plate 113, and the third support plate 113 is slidably connected to the base 600; in some embodiments, the second telescopic cylinder 210 of the stretching unit 200 acts on the third support plate 113; in some embodiments, the top end of the second telescopic member of the second telescopic cylinder 210 is fixedly connected to the third support plate 113.

[0057] In some embodiments, the first telescopic cylinder 413, the second telescopic cylinder 210, and the third telescopic cylinder 112 are all hydraulic cylinders.

[0058] The stretching process of the stretching device of the present application is described in detail below:

[0059] The silicon steel 700 moves from the heating channel of the heating block to the second clamping assembly 120, and then passes through the cooling unit 400 and abuts against the first clamping assembly 110. The silicon steel 700 is located in the second cooling channel, and the four third telescopic cylinders 112 are controlled to work to clamp the silicon steel 700 in the first clamping assembly 110 and the second clamping assembly 120. After the clamping is completed, the second telescopic cylinder 210 is controlled to operate to pull the first clamping assembly 110 to move, thereby pulling the silicon steel 700 clamped in the first clamping assembly 110 and the second clamping assembly 120. After the stretching is completed or during the stretching process, The air conditioner continuously supplies cold air to the first cooling channel through the cold air pump to cool the silicon steel 700 located in the second cooling channel. At the same time, the first telescopic cylinder 413 can be adjusted to drive the arc plate 412 to extend and retract, thereby increasing the length of the second cooling channel, so as to completely wrap the silicon steel 700 and thoroughly cool the silicon steel 700. After the cooling operation is completed, the drive motor 520 is controlled to drive the drive screw 510 to rotate. The rotation of the drive screw 510 drives the threadedly connected cooling block 411 to move toward the drive motor 520. The two cooling blocks 411 are separated, and the silicon steel 700 is taken out to complete the stretching.

[0060] The stretching device of the present application has at least the following advantages:

[0061] (1) The present application includes a first cooling component and a second cooling component that are arranged relative to each other, and the first cooling component and the second cooling component both include cooling blocks. The two cooling blocks are butted together to enclose a second cooling channel for the silicon steel gap to pass through, and the second cooling channel is for the silicon steel to pass through. The two cooling blocks are both provided with a first cooling channel for the circulation of a cooling medium and an inlet connected to the first cooling channel. The second cooling channel is connected to the first cooling channel, so that the cooling medium supplied by an external cooling device can enter the second cooling channel from the first cooling channel, act on the silicon steel in the second cooling channel, and have a cooling effect on the silicon steel. At the same time, the two cooling blocks are butted together to enclose the second cooling channel, which has a wrapping effect on the silicon steel. Compared with the prior art, the cooling structure is an open end with a large area. The wrapping cooling of the present application increases the cooling efficiency of the silicon steel and reduces energy waste.

[0062] (2) The present application includes a cooling block, a driving screw connected to the cooling block, and a driving motor connected to the driving screw. When the motor is in operation, it can drive the driving screw to rotate. The forward and reverse rotation of the screw causes the cooling block to move closer to or farther away from the driving motor, so that the second cooling channel enclosed by the cooling block can be opened and closed, thereby facilitating the removal of the silicon steel.

[0063] (3) The present application is provided with a plurality of second telescopic cylinders, which are arranged at intervals along a direction perpendicular to the stretching direction of the silicon steel, and the plurality of second telescopic cylinders work together to enable the first clamping assembly to move smoothly.

[0064] (4) In the present application, each cooling block is provided with an arc-shaped groove extending along the extension direction of the silicon steel. The two arc-shaped grooves are arranged opposite to each other in a direction perpendicular to the extension direction of the silicon steel to enclose a cylindrical second cooling channel. The first cooling component and the second cooling component both include an arc-shaped plate, which is slidably connected to the arc-shaped groove of the corresponding cooling block. One end of the arc-shaped plate can extend out of the cooling block or be located in the arc-shaped groove. The arc-shaped plate can be an extension of the cooling block, that is, the second cooling channel can extend along the stretching direction of the silicon steel. It can not only match silicon steels of various different lengths, but also adjust the length of the cooling channel based on the different lengths of the silicon steel before and after stretching, which has good practicality.

[0065] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0066] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0067] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0068] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0069] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A stretching device for stretching silicon steel, characterized in that: The stretching device comprises: A clamping unit, comprising a first clamping assembly and a second clamping assembly for respectively clamping two ends of the silicon steel; A stretching unit, provided with a stretching end connected to the first clamping assembly, so that the first clamping assembly can reciprocate along the extension direction of the silicon steel; A heating element, used for heating the silicon steel; A cooling unit is located between the first clamping assembly and the second clamping assembly, and includes a first cooling assembly and a second cooling assembly arranged opposite to each other; the first cooling assembly and the second cooling assembly both include cooling blocks, both cooling blocks are provided with a first cooling channel for the circulation of cooling medium and an inlet connected to the first cooling channel, the two cooling blocks are butt-jointed to enclose a second cooling channel for the silicon steel gap to pass through, and the second cooling channel is connected to the first cooling channel.

2. The stretching device according to claim 1, characterized in that Each of the cooling blocks is provided with an arc-shaped groove penetrating along the extension direction of the silicon steel, and the two arc-shaped grooves are arranged opposite to each other in a direction perpendicular to the extension direction of the silicon steel to enclose the second cooling channel in a cylindrical shape.

3. The stretching device according to claim 1, characterized in that: The first cooling assembly and the second cooling assembly both include an arc-shaped plate, which is slidably connected to the arc-shaped groove of the corresponding cooling block, and one end of the arc-shaped plate can extend out of the cooling block or be located in the arc-shaped groove.

4. The stretching device according to claim 3, characterized in that The first cooling assembly and the second cooling assembly both include a first telescopic cylinder whose telescopic end is connected to the arc plate; the telescopic end of the first telescopic cylinder reciprocates along the extension direction of the silicon steel and is connected to a cooling block or a clamping unit.

5. The stretching device according to any one of claims 1 to 4, characterized in that: The first cooling assembly and the second cooling assembly both include a power component and an air conditioner which are sequentially connected to an inlet.

6. The stretching device according to any one of claims 1 to 4, characterized in that: The first cooling assembly and the second cooling assembly respectively include a driving unit, and the driving unit is connected to the cooling block.

7. The stretching device according to claim 6, characterized in that The first cooling assembly and the second cooling assembly both include a driving motor connected to the cooling block via a driving screw; the cooling block encloses a second cooling channel for passing the silicon steel; the forward and reverse rotation of the screw causes the cooling block to approach or move away from the driving motor.

8. The stretching device according to claim 7, characterized in that The driving motor is fixedly connected to the first supporting plate; a guide column is provided on a side of the cooling block close to the driving motor; and a guide groove matching the guide column is provided on a side of the first supporting plate close to the cooling block.

9. The stretching device according to any one of claims 1 to 3, characterized in that: It includes a base, the second clamping assembly is fixedly connected to the base, the first clamping assembly is slidably connected to the base, the stretching unit includes a plurality of second telescopic cylinders connected to the first clamping assembly, the fixed end of the second telescopic cylinder is connected to the base, and the telescopic end of the second telescopic cylinder constitutes the stretching end.

10. The stretching device according to any one of claims 1 to 3, characterized in that: The first clamping assembly and the second clamping assembly both include a clamping block and a third telescopic cylinder; the clamping block is provided with a first clamping channel for the silicon steel to pass through; the clamping block is provided with a second clamping channel connected to the first clamping channel and the outside of the clamping block; the telescopic end of the third telescopic cylinder penetrates into the second clamping channel to act on the silicon steel.

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