CN213702391U - Magnet assembly fixture - Google Patents

Abstract

The utility model relates to a magnet assembly fixture, which comprises a bottom plate and a pressure rod positioned above the bottom plate, wherein the middle part of the bottom plate is provided with a first positioning pin, and the lateral part of the bottom plate is provided with two second positioning pins; the compression bar comprises a rod part and a positioning disc on the rod part, wherein the middle part of the positioning disc is provided with a positioning block, and the side part of the positioning disc is provided with two third positioning pins; and a magnet is arranged at the upper end of the pressure lever. The utility model relates to a rationally, simple structure, manufacturing cost is lower, and is easy and simple to handle, uses the application of this type of frock and liquid nitrogen cold assembly, makes part assembly efficiency high, and the size is stable, has consequently improved machining efficiency greatly and then has improved production efficiency.

Description

Magnet assembly fixture

Technical Field

The utility model relates to a magnet assembly fixture belongs to tool equipment technical field.

Background

For a steel bearing sleeve with a special structure, the bearing sleeve cannot be fixed on an assembly tool due to the fact that the bearing sleeve is influenced by gravity. The traditional assembly method cannot realize and solve the problem of the assembly rotation relation between the bearing sleeve and the seat body. In addition, for the seat body with large interference of the bearing sleeve, the interference required by the seat body made of a softer material is cut by the seat body made of a harder material in a normal state through press fitting, so that the pressing force is lost. Through a traditional hard pressing method, on one hand, a seat body is damaged to a great extent, and on the other hand, a series of problems that pressing force is large due to large interference of a bearing sleeve, the bearing sleeve cannot be assembled to the bottom, assembling speed is low and the like exist.

Disclosure of Invention

The utility model aims to overcome the not enough of existence among the prior art, provide a magnet assembly fixture, its processing is stable, improves part assembly qualification rate and production efficiency greatly.

According to the utility model provides a technical scheme: a magnet assembling tool comprises a bottom plate and a pressure lever positioned above the bottom plate, wherein a first positioning pin is arranged in the middle of the bottom plate, and two second positioning pins are arranged on the side part of the bottom plate; the compression bar comprises a rod part and a positioning disc on the rod part, wherein the middle part of the positioning disc is provided with a positioning block, and the side part of the positioning disc is provided with two third positioning pins; and a magnet is arranged at the upper end of the pressure lever.

Further, the first positioning pin is a disk type.

Further, the magnet is a neodymium iron boron magnet.

Compared with the prior art, the utility model, have following advantage:

1. reasonable in design, simple structure, manufacturing cost is lower, and is easy and simple to handle, uses the application of this type of frock and liquid nitrogen cooling assembly, makes the part assembly efficiency high, and the size is stable.

2. The processing is stable, and the assembly qualification rate of parts is greatly improved.

Drawings

Fig. 1 is a schematic view of the usage state of the present invention.

Fig. 2 is a top view of fig. 1.

Fig. 3 is a schematic view of the pressure lever and the bearing housing.

Fig. 4 is a schematic view of the base plate and the base body.

Description of reference numerals: 1-bottom plate, 2-second positioning pin, 3-pressure rod, 4-rod part, 5-positioning plate, 6-positioning block, 7-third positioning pin, 8-magnet, 9-first positioning pin, 10-bearing sleeve and 11-seat body.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 3 to 4, the magnet assembling tool comprises a bottom plate 1 and a pressure lever 3 located above the bottom plate 1, wherein a disc-shaped first positioning pin 9 is arranged in the middle of the bottom plate 1, and two second positioning pins 2 are arranged on the side parts of the bottom plate 1; the compression bar 3 comprises a rod part 4 and a positioning disc 5 on the rod part, wherein a positioning block 6 is arranged in the middle of the positioning disc 5, and two third positioning pins 7 are arranged on the side part of the positioning disc; and a neodymium iron boron magnet 8 is arranged at the upper end of the pressure lever 3.

Will frock and liquid nitrogen cold-packed technology cooperation assembly process who uses, including following step:

the method comprises the following steps:

step 1: before installation, the seat body 11 and the bearing sleeve 10 are blown clean by an air gun, and scrap iron and dirt are not allowed to remain.

Step 2: and (3) putting the seat body 11 into a stress relief furnace for heating at the temperature of 149-160 ℃, and keeping the temperature for 45-75 minutes, wherein the temperature is kept all the time before assembly.

Step two:

step 1: the bearing housing 10 is placed into a heat-insulating basin.

Step 2: opening the liquid nitrogen tank, pouring a proper amount of liquid nitrogen into the heat preservation basin, ensuring that the liquid level of the liquid nitrogen is always at least 3cm higher than the bearing sleeve 10, allowing the liquid nitrogen to be supplemented at any time in the process, keeping the basin body static, and covering a glass cover. The bearing housing 10 is held at-168 ℃ to-212 ℃ for at least 5 minutes.

Step three:

step 1: the seat body 11 is taken out by using heat insulation gloves and is arranged on the tool.

Step 2: the third positioning pin 7 of the pressing rod 3 is pressed into the threaded hole of the seat body 11 quickly, and the direction of the seat body 11 is aligned.

And step 3: the bearing sleeve 10 in the liquid nitrogen basin is taken out by an iron hook, the bearing sleeve 10 is quickly arranged on the pressure lever 3 by using the heat insulation gloves, the bearing sleeve 10 is quickly pressed into the seat body 11 until the seat body 11 is completely attached, if the seat body 11 and the bearing sleeve 10 can not be easily pressed, the seat body 11 and the bearing sleeve 10 are placed back again for heat preservation, and the bearing sleeve 10 can not be forcibly pressed into. Each assembly was completed in 30 seconds.

Step four:

whether the surfaces of the assembly parts are completely attached or not is visually detected, and only the completely attached parts can be continuously circulated.

Step five:

and placing the assembled parts in a room temperature environment until the parts recover to the normal temperature.

The press rod 3 is arranged on a drilling machine of Z5125A, the tool is placed on a worktable, the base body 11 is limited by the first positioning pin 9 and the second positioning pin 2, and the base body 11 is arranged on the tool. After the bearing sleeve 10 is placed in liquid nitrogen for cooling, the position of the bearing sleeve is limited by the two third positioning pins 7 and the end part of the pressure rod, then the seat body 11 is fixed on the pressure rod 3 through the neodymium iron boron magnet 8, after the hole positions of the bearing sleeve 10 and the seat body 11 are aligned, the tool is fixed on a working table through screws, and then the seat body 11 can be assembled in batches. The processing is stable and the efficiency is high.

The working principle is as follows:

(1) as shown in fig. 1 to 2, according to the requirement of the hole site of the seat body 11, the position of the corresponding positioning pin is designed on the pressure lever to limit the position of the bearing sleeve 10, so that the position of the bearing sleeve is consistent with the requirement of the hole site of the seat body 11.

(2) The liquefied nitrogen is a special industrial product, is widely applied to manufacturing, industrial and agricultural production such as medicines and foods, and daily life, and is mainly a freezing storage medium. The liquid nitrogen is from air, can be recycled and has no pollution. We use the property of the metal housing 11 material that linear expansion under cryogenic conditions causes dimensional shrinkage, and for bearing sleeves 10 with large interference fits we refer to liquid nitrogen in the interference fit.

It is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims (3)

1. The magnet assembling tool is characterized by comprising a bottom plate (1) and a pressure lever (3) positioned above the bottom plate (1), wherein the middle part of the bottom plate (1) is provided with a first positioning pin (9), and the side part of the bottom plate is provided with two second positioning pins (2); the compression bar (3) comprises a rod part (4) and a positioning disc (5) on the rod part, wherein the middle part of the positioning disc (5) is provided with a positioning block (6), and the side part of the positioning disc is provided with two third positioning pins (7); and a magnet (8) is arranged at the upper end of the pressure lever (3).

2. The magnet assembling tool according to claim 1, wherein the first positioning pin (9) is disc-shaped.

3. The magnet assembly tool according to claim 1, characterized in that the magnet (8) is a neodymium iron boron magnet.

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