Card sleeve press-fitting device and press-fitting method for zinc oxide resistor disc

Abstract

The invention relates to a clamping sleeve press-fitting device for a zinc oxide resistor disc and a press-fitting method.The press-fitting device comprises a mounting frame and a press-fitting mechanism, the mounting frame provides a mounting position and support for the press-fitting mechanism, the press-fitting mechanism comprises a lower pressing block, an upper pressing block and a press-fitting driving device, the lower pressing block is arranged on the mounting frame, and the upper pressing block is arranged on the mounting frame; the upper pressing block is arranged on the mounting frame through a press-fitting driving device, the upper pressing block is located above the lower pressing block, the lower surface of the upper pressing block is parallel and opposite to the upper surface of the lower pressing block, and the press-fitting driving device is used for driving the upper pressing block to move up and down so that the upper pressing block can be close to or away from the lower pressing block. Therefore, the press-fitting device can replace manual work to achieve press-fitting operation of the clamping sleeve, the production efficiency can be improved, the upper pressing block and the lower pressing block can be matched to evenly apply pressure to the resistor disc and the clamping sleeve, compared with manual sleeving, the clamping sleeve is stressed more evenly in the circumferential direction, and therefore even protection on the edge of the resistor disc is achieved, and the service life of the resistor disc is prolonged. And the generation of aluminum deviation of the resistor disc is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of arrester resistor production, and in particular to a ferrule press-fitting device and a press-fitting method for a zinc oxide resistor. Background Art

[0002] Lightning strike is one of the main causes of power system failures. As an important lightning protection device, the arrester is responsible for absorbing and releasing lightning impact energy. The zinc oxide varistor is the core component of the arrester. The electrical properties of the resistor determine the performance of the arrester. During the use of the zinc oxide arrester, when the current caused by overvoltage passes through the arrester, there will be a relatively serious skin effect, which will cause the arrester to have multiple local breakdowns at the edge during normal operation. To address this problem, a relatively stable and reliable solution is to leave margins on the end faces of the resistors during the preparation of the zinc oxide resistors. That is, in the process of spraying aluminum electrodes on the zinc oxide varistor, margins need to be left to ensure the insulation performance of the resistor edges. The quality of the margins has a more obvious impact on the performance of the resistors.

[0003] The current conventional method is to manually set a ferrule on the resistor before spraying the aluminum electrode on the resistor. For products with a diameter less than 85mm, taking the D45 resistor as an example, about 1,000 ferrules need to be set per shift. Due to the full manual operation, the production efficiency is low, and there is still 8% aluminum bias, which needs to be reworked and scraped. The aluminum spray eccentricity of the resistor product depends to a large extent on the parallelism of the ferrule. For small-sized resistors, due to their small product area and small protection area involved, the traditional manual ferrule method is difficult to ensure that the ferrule uniformly protects the product edge by 0.3~0.5mm; sometimes on the surface, the protection is uniform, but because it is a manual ring, it will still cause aluminum bias in the resistor during the aluminum spraying process. Summary of the invention

[0004] The first object of the present invention is to provide a ferrule pressing device for zinc oxide resistors, so as to replace manual ferrule operation, improve production efficiency, improve the ferrule effect, achieve uniform protection of the edge of the resistor, and reduce the generation of aluminum bias in the resistor.

[0005] The second object of the present invention is to provide a pressing method based on the above-mentioned zinc oxide resistor ferrule pressing device.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A ferrule pressing device for zinc oxide resistor, comprising:

[0008] Mounting frame;

[0009] The pressing mechanism includes a lower pressing block, an upper pressing block and a pressing drive device, wherein the lower pressing block is arranged on the mounting frame, the upper pressing block is arranged on the mounting frame through the pressing drive device, and the upper pressing block is located above the lower pressing block, and the pressing drive device is used to drive the upper pressing block to move up and down so that the upper pressing block is close to or away from the lower pressing block.

[0010] In one embodiment of the present application, the lower pressure block is adjustably disposed on the mounting frame, and / or the press-fitting drive device is adjustably disposed on the mounting frame, so that the gap between the upper pressure block and the lower pressure block is adjustable.

[0011] In one embodiment of the present application, the lower pressure block is arranged on the mounting frame by a first adjusting bolt, the first adjusting bolt passes through a first threaded hole on the mounting frame and is rotatably connected to the lower pressure block, and / or the press-fitting drive device is arranged on the mounting frame by a second adjusting bolt, the second adjusting bolt passes through a second threaded hole on the mounting frame and is rotatably connected to the press-fitting drive device.

[0012] In one embodiment of the present application, the mounting frame is provided with a horizontal adjustment device, and the horizontal adjustment device is used to adjust the working surface of the lower pressing block to be horizontal.

[0013] In one embodiment of the present application, the horizontal adjustment device includes an adjustment support foot and a spirit level, a plurality of the adjustment support feet are circumferentially spaced at the bottom of the mounting frame, the spirit level is disposed on the mounting frame, an adjustment stud is disposed between the adjustment support foot and one of the mounting frames, a third threaded hole is disposed between the adjustment support foot and another of the mounting frames, and the adjustment stud is threadedly engaged with the third threaded hole.

[0014] In one embodiment of the present application, the press-fitting drive device is a piston cylinder, or the press-fitting drive device is a linear motor, or the press-fitting drive device includes a rotary motor and a transmission mechanism.

[0015] In one embodiment of the present application, the press-fitting drive device includes:

[0016] A cylinder, a piston rod of which is connected to the upper pressing block;

[0017] An air supply device is connected with the air cylinder to form a pneumatic circuit.

[0018] In one embodiment of the present application, the gas supply device includes:

[0019] an air source connected to the air cylinder;

[0020] An air pressure regulating valve, the air pressure regulating valve being arranged on a connecting pipeline between the air source and the air cylinder;

[0021] A pneumatic switch is connected to the air pressure regulating valve to control the switch of the air pressure regulating valve.

[0022] In one embodiment of the present application, a first limiting groove for limiting the resistor is provided on the working surface of the lower pressing block, and a second limiting groove for limiting the sleeve is provided on the working surface of the upper pressing block.

[0023] A press-fitting method of a ferrule press-fitting device for a zinc oxide resistor according to any one of the above, comprising the steps of:

[0024] Placing the resistor sheet on the working surface of the lower pressing block, and placing the first ferrule coaxially with the resistor sheet on the resistor sheet;

[0025] The press-fitting driving device is started, and the press-fitting driving device drives the upper pressing block to press downward at a preset speed to insert the first ferrule into the resistor sheet;

[0026] Turn over the resistor sheet, and place the second ferrule coaxially with the resistor sheet on the resistor sheet;

[0027] The press-fitting driving device is started, and the press-fitting driving device drives the upper pressing block to press downward at a preset speed to insert the second ferrule into the resistor sheet;

[0028] Adjust the position of the resistor, start the press-fit drive device, and press the unpressed first ferrule or the second ferrule again;

[0029] Repeat the above steps until the first ferrule and the second ferrule are pressed into place.

[0030] In one embodiment of the present application, the first ferrule and the second ferrule are heated to a preset temperature before press-fitting.

[0031] It can be seen from the above technical scheme that the present invention discloses a ferrule pressing device for zinc oxide resistors, which comprises a mounting frame and a pressing mechanism, wherein the mounting frame provides a mounting position and support for the pressing mechanism, and the pressing mechanism comprises a lower pressing block, an upper pressing block and a pressing drive device, the lower pressing block is arranged on the mounting frame, the upper pressing block is arranged on the mounting frame through the pressing drive device, and the upper pressing block is located above the lower pressing block, the lower surface of the upper pressing block is parallel to the upper surface of the lower pressing block, that is, the working surface of the upper pressing block is parallel to the working surface of the lower pressing block, and the pressing drive device is used to drive the upper pressing block to move up and down so that the upper pressing block is close to or away from the lower pressing block.

[0032] When in use, the resistor is placed on the working surface of the lower pressing block, and the first ferrule is placed on the resistor coaxially with the resistor, the pressing driving device is started, the pressing driving device drives the upper pressing block to press down at a preset speed, the first ferrule is inserted into the resistor, the resistor is turned over, and the second ferrule is placed on the resistor coaxially with the resistor, the pressing driving device is started again, the pressing driving device drives the upper pressing block to press down at a preset speed, the second ferrule is inserted into the resistor, and then the position of the resistor is repeatedly adjusted. After each adjustment, the pressing driving device is started to press the first ferrule or the second ferrule that has not been pressed again until the first ferrule and the second ferrule are pressed into place. It can be seen that the above-mentioned ferrule pressing device for zinc oxide resistors can replace manual work to realize the pressing operation of the ferrule, and can Improve production efficiency, and the upper and lower pressure blocks can cooperate to apply uniform pressure to the resistor and the ferrule. Compared with manual assembly, the ferrule is more evenly stressed in the circumferential direction, thereby achieving uniform protection of the edge of the resistor and reducing the generation of aluminum bias in the resistor. It can effectively reduce the grinding rework rate of the resistor. Taking small-sized resistors as an example, the eccentricity of small-sized resistors is reduced from 8% to below 0.5%, and the square wave screening edge breakdown rate is reduced from about 5% before application to about 0.5% after application. It can effectively reduce production energy consumption, which is in line with the energy-saving and emission reduction concept advocated by the current society. The improvement of the qualified rate increases the output of resistors per shift. Taking small-sized resistors as an example, the shift output can be increased from 1,000 pieces to 2,500 pieces, which reduces the manufacturing cost of resistors. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 A schematic diagram of the structure of a ferrule press-fitting device for a zinc oxide resistor provided in an embodiment of the present invention;

[0035] Figure 2 A flow chart of a press-fitting method provided by an embodiment of the present invention;

[0036] Figure 3 A flow chart of a press-fitting method provided in another embodiment of the present invention.

[0037] In the figure:

[0038] 1 is a mounting frame; 2 is an upper pressing block; 3 is a lower pressing block; 4 is a second adjusting bolt; 5 is a cylinder; 6 is a piston rod; 7 is an adjusting support foot; 8 is a resistor; and 9 is a ferrule. DETAILED DESCRIPTION

[0039] One of the core points of the present invention is to provide a ferrule pressing device for zinc oxide resistors. The structural design of the ferrule pressing device for zinc oxide resistors enables it to replace manual ferrule operation, improve production efficiency, and improve the ferrule effect, achieve uniform protection of the edge of the resistor, and reduce the generation of aluminum bias in the resistor.

[0040] Another core of the present invention is to provide a pressing method based on the above-mentioned ferrule pressing device for zinc oxide resistor.

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figure 1 , Figure 1 A schematic structural diagram of a ferrule press-fitting device for a zinc oxide resistor provided in an embodiment of the present invention.

[0043] The embodiment of the present invention discloses a ferrule press-fitting device for a zinc oxide resistor. The ferrule press-fitting device for a zinc oxide resistor comprises a mounting frame 1 and a press-fitting mechanism.

[0044] The mounting frame 1 provides a mounting position and support for the press-fitting mechanism. The mounting frame 1 should have sufficient strength to provide effective support. In this case, the mounting frame 1 can be made of steel, aluminum alloy and other materials.

[0045] The pressing mechanism includes a lower pressing block 3, an upper pressing block 2 and a pressing drive device. The lower pressing block 3 is arranged on the mounting frame 1, and the upper pressing block 2 is arranged on the mounting frame 1 through the pressing drive device, and the upper pressing block 2 is located above the lower pressing block 3. The lower surface of the upper pressing block 2 is parallel to the upper surface of the lower pressing block 3, that is, the working surface of the upper pressing block 2 is parallel to the working surface of the lower pressing block 3. The pressing drive device is used to drive the upper pressing block 2 to move up and down so that the upper pressing block 2 is close to or away from the lower pressing block 3.

[0046] When in use, the resistor 8 is placed on the working surface of the lower pressing block 3, and the first ferrule 9 is placed on the resistor 8 coaxially with the resistor 8, the press-fitting drive device is started, the press-fitting drive device drives the upper pressing block 2 to press down at a preset speed, the first ferrule 9 is inserted into the resistor 8, the resistor 8 is turned over, and the second ferrule 9 is placed on the resistor 8 coaxially with the resistor 8, the press-fitting drive device is started again, the press-fitting drive device drives the upper pressing block 2 to press down at a preset speed, the second ferrule 9 is inserted into the resistor 8, and then the position of the resistor 8 is repeatedly adjusted. After each adjustment, the press-fitting drive device is started to tighten the unpressed first ferrule 9 or the second ferrule 9 again until the first ferrule 9 and the second ferrule 9 are pressed into place.

[0047] Compared with the prior art, the ferrule pressing device for zinc oxide resistor provided by the embodiment of the present invention can replace manual pressing of the ferrule 9, thereby improving production efficiency, and the upper pressing block 2 and the lower pressing block 3 can cooperate to uniformly press the resistor 8 and the ferrule 9. Compared with manual assembly, the ferrule 9 is more evenly stressed in the circumferential direction, thereby achieving uniform protection of the edge of the resistor 8, reducing the generation of aluminum bias in the resistor 8, and effectively reducing the grinding rework rate of the resistor 8. Taking a small-sized resistor 8 as an example, the eccentricity of the small-sized resistor 8 is reduced from 8% to below 0.5%, and the square wave screening edge breakdown rate is reduced from about 5% before application to about 0.5% after application, which can effectively reduce production energy consumption, conform to the energy conservation and emission reduction concept advocated by the current society, and the improvement of the qualified rate increases the output of the resistor 8 per shift. Taking a small-sized resistor 8 as an example, its shift output can be increased from 1,000 pieces to 2,500 pieces, thereby reducing the manufacturing cost of the resistor 8.

[0048] Since resistor sheets 8 of different specifications need to be press-fitted, the initial gap between the lower pressing block 3 and the upper pressing block 2 needs to be adjustable. In one embodiment of the present application, in order to make the initial gap between the lower pressing block 3 and the upper pressing block 2 adjustable, the lower pressing block 3 is adjustably arranged on the mounting frame 1 in an upper and lower position, and / or the pressing drive device is adjustably arranged on the mounting frame 1 in an upper and lower position, so that the gap between the upper pressing block 2 and the lower pressing block 3 is adjustable, that is, the initial gap between the upper pressing block 2 and the lower pressing block 3 can be adjusted only by adjusting the upper and lower positions of the lower pressing block 3, or the upper and lower positions of the upper pressing block 2 can be adjusted only by adjusting the upper and lower positions of the pressing drive device, thereby adjusting the initial gap between the upper pressing block 2 and the lower pressing block 3. Of course, the upper and lower positions of the lower pressing block 3 and the pressing drive device can also be adjusted at the same time to achieve the purpose of adjusting the initial gap between the upper pressing block 2 and the lower pressing block 3.

[0049] Specifically, in one embodiment of the present application, in order to adjust the position of the lower pressing block 3, the lower pressing block 3 is set on the mounting frame 1 through a first adjusting bolt, the first adjusting bolt passes through the first threaded hole on the mounting frame 1, and is rotatably connected with the lower pressing block 3. One or more first adjusting bolts can be set. When only one first adjusting bolt is set, the first adjusting bolt is preferably set at the center of the lower pressing block 3, and a plurality of support rods are arranged around the first adjusting bolt at intervals. The support rods are rotatably matched with the lower pressing block 3 to guide and support the lower pressing block 3. Of course, a plurality of first adjusting bolts can also be set, and each first adjusting bolt The bolts are arranged at intervals along the circumference of the lower pressure block 3. When in use, the upper and lower position adjustment of the lower pressure block 3 is achieved by rotating the first adjusting bolt, and / or the press-fitting drive device is set on the mounting frame 1 through the second adjusting bolt 4, the second adjusting bolt 4 passes through the second threaded hole on the mounting frame 1, and is rotatably connected to the press-fitting drive device, the second adjusting bolt 4 passes through the outer shell of the press-fitting drive device, and is threadedly matched with the second threaded hole on the mounting frame 1. It is best to arrange multiple second adjusting bolts 4 around the circumference of the press-fitting drive device. When it is necessary to adjust the position of the upper pressure block 2, just rotate each second adjusting bolt 4.

[0050] In order to ensure that the working surfaces of the upper pressing block 2 and the lower pressing block 3 are level, in one embodiment of the present application, the mounting frame 1 is provided with a level adjustment device, which is used to adjust the working surface of the lower pressing block 3 to be level. Specifically, the level adjustment device includes an adjustment support foot 7 and a level meter, a plurality of adjustment support feet 7 are arranged at intervals along the circumferential direction at the bottom of the mounting frame 1, the level meter is arranged on the mounting frame 1, an adjustment stud is arranged between the adjustment support foot 7 and one of the mounting frame 1, a third threaded hole is arranged between the adjustment support foot 7 and another of the mounting frame 1, and the adjustment stud is threadedly matched with the third threaded hole.

[0051] The press-fitting drive device is used to drive the upper pressure block 2 to move back and forth up and down in a straight line. In some embodiments of the present application, the press-fitting drive device is a piston cylinder, which includes a pneumatic cylinder 5 or a hydraulic cylinder, or the press-fitting drive device is a linear motor, or the press-fitting drive device includes a rotary motor and a transmission mechanism, and the transmission mechanism is used to convert the rotation of the rotary motor into linear motion. The transmission mechanism includes but is not limited to a rack and pinion mechanism, a cam-connecting rod mechanism, and a screw slider mechanism.

[0052] Specifically, in a specific embodiment of the present application, the press-fitting drive device includes a cylinder 5 and an air supply device, the piston rod 6 of the cylinder 5 is connected to the upper pressing block 2, and the air supply device is connected to the cylinder 5 to form a pneumatic circuit.

[0053] Furthermore, in the above embodiment, the air supply device includes an air source, an air pressure regulating valve and a pneumatic switch, wherein the air source is connected to the cylinder 5, and the air pressure regulating valve is arranged on the connecting pipeline between the air source and the cylinder 5. The air pressure regulating valve can serve as a pneumatic circuit switch and can adjust the air pressure in the connecting pipeline at the same time, thereby adjusting the air pressure output to the cylinder 5. The pneumatic switch is connected to the air pressure regulating valve to control the switch of the air pressure regulating valve.

[0054] To further optimize the above technical solution, the pneumatic switch is a foot-operated pneumatic switch, which can free the hands of production personnel to operate the resistor 8 and the ferrule 9.

[0055] In order to prevent the resistor 8 from moving relative to the lower pressing block 3 during the pressing process, and to facilitate the production personnel to place the resistor 8, in one embodiment of the present application, a first limiting groove for limiting the resistor 8 is provided on the working surface of the lower pressing block 3, and a second limiting groove for limiting the sleeve 9 is provided on the working surface of the upper pressing block 2. During the pressing process, the first limiting groove limits the resistor 8, and the second limiting groove limits the sleeve 9.

[0056] Since after the ferrule 9 on one side is pressed and installed, the resistor 8 needs to be turned over and then the ferrule 9 on the other side needs to be pressed and installed, the above-mentioned first limiting groove is a step groove, and the groove portion with a smaller diameter in the lower layer is used to cooperate with the resistor 8 without the ferrule 9, and the groove portion with a larger diameter in the upper layer is used to cooperate with the resistor 8 with the ferrule 9, and the two groove portions of the upper and lower layers are coaxially arranged.

[0057] An embodiment of the present application also provides a press-fitting method based on the clamping sleeve press-fitting device for zinc oxide resistors as described in the above embodiment, such as Figure 2 As shown, the press-fitting method comprises the steps of:

[0058] The resistor sheet 8 is placed on the working surface of the lower pressing block 3 , and the first clamping sleeve 9 is placed on the resistor sheet 8 coaxially with the resistor sheet 8 .

[0059] The press-fitting driving device is started, and the press-fitting driving device drives the upper pressing block 2 to press downward at a preset speed, so that the first clamping sleeve 9 is inserted into the resistor sheet 8 .

[0060] The resistor sheet 8 is turned over, and the second ferrule 9 is placed on the resistor sheet 8 coaxially with the resistor sheet 8 .

[0061] The press-fitting driving device is started, and the press-fitting driving device drives the upper pressing block 2 to press downward at a preset speed, so that the second clamping sleeve 9 is inserted into the resistor sheet 8 .

[0062] The position of the resistor 8 is adjusted, and the pressing drive device is started to press the unpressed first clamping sleeve 9 or the second clamping sleeve 9 again.

[0063] Repeat the above steps, that is, adjust the position of the resistor 8 for multiple times, and start the press-fitting drive device after each adjustment, until the first clamping sleeve 9 and the second clamping sleeve 9 are press-fitted into place.

[0064] To facilitate press-fitting, before the above press-fitting step, the first ferrule 9 and the second ferrule 9 are heated to a preset temperature to utilize the thermal expansion and contraction effect to expand the first ferrule 9 and the second ferrule 9 for easy insertion. The preset temperature may be 100°C.

[0065] It should be noted that the ferrule press-fitting device and press-fitting method for zinc oxide resistor provided in the embodiment of the present application are not only applicable to the production process of zinc oxide resistor 8, but also applicable to other process that requires the ferrule 9. The ferrule press-fitting device for zinc oxide resistor of the technical solution is simple to operate, can significantly improve the efficiency of the ferrule 9, reduce labor consumption, improve production efficiency, and reduce production costs.

[0066] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0067] It should be understood that the use of "system", "device", "unit" and / or "module" in this application is only a method for distinguishing different components, elements, parts, parts or assemblies at different levels. However, if other words can achieve the same purpose, the word can be replaced by other expressions.

[0068] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "a kind" and / or "the" do not refer to the singular, but also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of clearly identified steps and elements, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements. The elements defined by the sentence "includes a..." do not exclude the existence of other identical elements in the process, method, commodity or device that includes the elements.

[0069] In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" means two or more than two.

[0070] If a flow chart is used in the present application, the flow chart is used to illustrate the operations performed by the system according to the embodiment of the present application. It should be understood that the preceding or following operations are not necessarily performed accurately in order. On the contrary, each step can be processed in reverse order or simultaneously. At the same time, other operations can also be added to these processes, or a certain step or several steps of operations can be removed from these processes.

[0071] It should also be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such articles or devices. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the article or device including the above elements.

[0072] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A ferrule pressing device for zinc oxide resistor, characterized in that: include: Mounting frame; The pressing mechanism includes a lower pressing block, an upper pressing block and a pressing drive device, wherein the lower pressing block is arranged on the mounting frame, the upper pressing block is arranged on the mounting frame through the pressing drive device, and the upper pressing block is located above the lower pressing block, and the pressing drive device is used to drive the upper pressing block to move up and down so that the upper pressing block is close to or away from the lower pressing block.

2. The ferrule press-fitting device for zinc oxide resistor according to claim 1, characterized in that: The lower pressing block is adjustably disposed on the mounting frame, and / or the press-fitting driving device is adjustably disposed on the mounting frame, so that the gap between the upper pressing block and the lower pressing block is adjustable.

3. The ferrule press-fitting device for zinc oxide resistor according to claim 2, characterized in that: The lower pressing block is arranged on the mounting frame by a first adjusting bolt, the first adjusting bolt passes through a first threaded hole on the mounting frame and is rotatably connected to the lower pressing block, and / or the press-fitting driving device is arranged on the mounting frame by a second adjusting bolt, the second adjusting bolt passes through a second threaded hole on the mounting frame and is rotatably connected to the press-fitting driving device.

4. The ferrule press-fitting device for zinc oxide resistor according to any one of claims 1 to 3, characterized in that: The mounting frame is provided with a horizontal adjustment device, and the horizontal adjustment device is used to adjust the working surface of the lower pressing block to be horizontal.

5. The ferrule press-fitting device for zinc oxide resistor according to claim 4, characterized in that: The horizontal adjustment device includes an adjustment support foot and a spirit level. A plurality of the adjustment support feet are circumferentially spaced at the bottom of the mounting frame. The spirit level is disposed on the mounting frame. An adjustment stud is disposed between the adjustment support foot and one of the mounting frames. A third threaded hole is disposed between the adjustment support foot and another of the mounting frames. The adjustment stud is threadedly engaged with the third threaded hole.

6. The ferrule press-fitting device for zinc oxide resistor according to any one of claims 1 to 3, characterized in that: The press-fitting drive device is a piston cylinder, or the press-fitting drive device is a linear motor, or the press-fitting drive device includes a rotary motor and a transmission mechanism.

7. The ferrule press-fitting device for zinc oxide resistor according to claim 6, characterized in that: The press-fitting drive device comprises: A cylinder, a piston rod of which is connected to the upper pressing block; An air supply device is connected with the air cylinder to form a pneumatic circuit.

8. The ferrule press-fitting device for zinc oxide resistor according to claim 7, characterized in that: The gas supply device comprises: an air source connected to the air cylinder; An air pressure regulating valve, the air pressure regulating valve being arranged on a connecting pipeline between the air source and the air cylinder; A pneumatic switch is connected to the air pressure regulating valve to control the switch of the air pressure regulating valve.

9. The ferrule press-fitting device for zinc oxide resistor according to any one of claims 1 to 3, characterized in that: A first limiting groove for limiting the position of the resistor sheet is arranged on the working surface of the lower pressing block, and a second limiting groove for limiting the position of the ferrule is arranged on the working surface of the upper pressing block.

10. A pressing method based on the ferrule pressing device for zinc oxide resistor according to any one of claims 1 to 9, characterized in that: Includes steps: Placing the resistor sheet on the working surface of the lower pressing block, and placing the first ferrule coaxially with the resistor sheet on the resistor sheet; The press-fitting driving device is started, and the press-fitting driving device drives the upper pressing block to press downward at a preset speed to insert the first ferrule into the resistor sheet; Turn over the resistor sheet, and place the second ferrule coaxially with the resistor sheet on the resistor sheet; The press-fitting driving device is started, and the press-fitting driving device drives the upper pressing block to press downward at a preset speed to insert the second ferrule into the resistor sheet; Adjust the position of the resistor, start the press-fit drive device, and press the unpressed first ferrule or the second ferrule again; Repeat the above steps until the first ferrule and the second ferrule are pressed into place.

11. The press-fitting method according to claim 10, characterized in that: Before press-fitting, the first ferrule and the second ferrule are heated to a preset temperature.

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