CN202498342U - Tool for riveting bearing - Google Patents

Abstract

The utility model proposes a tooling for bearing riveting, which includes a positioning sleeve, a pressing die, a push rod, a disc spring and a discharge plate; the pressing die is a circular plate structure with a guiding and positioning shaft head at the center; There are riveting ribs arranged around the positioning shaft head; the unloading plate is a circular plate structure with the same diameter as the die, and a through hole is opened in the center of the unloading plate; there are multiple discs on the plate structure of the unloading plate and the die Spring placement slots, a ejector rod is installed in the center of each disc spring placement slot, disc springs are strung on the ejector rods, one end of the ejector rod is fixedly connected with the die, and the other end of the ejector rod has a flange to limit the unloading plate, and The unloading plate can move axially along the ejector rod. The bearing riveting tool proposed by the utility model includes the functions of guiding and positioning, riveting, and unloading. Compared with the existing bearing riveting method, it has simple structure, convenient operation for workers, easy and timely and accurate unloading, and can be greatly improved. Improve work efficiency.

Description

A tooling for bearing riveting

technical field

The utility model relates to the technical field of mechanical processing, in particular to a tooling for bearing riveting.

Background technique

The bearing assembly is an important supporting component of various equipment connections. After the bearing is riveted, it must meet the positioning accuracy requirements and rotate flexibly. In the existing riveting process, the workpiece is put into the positioning sleeve on the workbench after being loaded into the bearing, and the upper die is riveted around to complete the riveting work of the bearing. There are two ways of riveting the upper die: the first In order to use the split upper die method for riveting, the upper die is composed of an upper template, a positioning shaft (material 45 steel, quenched and tempered) and four riveting pins (material T10A, quenched). The disadvantage of die riveting is that the riveting pin is very small, and the material is brittle after quenching, and the service life is low, and the workpiece and the upper die are squeezed together after riveting, making it difficult to unload; the second is the application Integral upper die method is used for riveting. In this method, the upper die is designed as a whole, and an elastic rubber pad for unloading is added. The material of the integral upper die is 45 steel that has been quenched. The disadvantages of this upper die When riveting, due to the small elasticity of the elastic rubber pad, the product and the upper mold are easily squeezed together, making it difficult to unload, and the elastic rubber pad has a short service life.

Contents of the invention

technical problem to be solved

In order to solve the problems existing in the prior art, the utility model proposes a tooling for bearing riveting, which is used to solve the short service life of the upper die assembly in the existing bearing riveting process, and the unloading efficiency is not high Shortcomings.

Technical solutions

The technical scheme of the utility model is:

The tooling for bearing riveting is characterized in that it includes a positioning sleeve, a die, a ejector rod, a disc spring and a stripping plate; there is a positioning through hole in the middle of the positioning sleeve; The circular plate structure of the shaft head, the diameter of the guiding and positioning shaft head matches the inner diameter of the bearing to be riveted, and the gap between the guiding and positioning shaft head and the bearing to be riveted is matched during processing; The outer contour size of the die matches the size of the outer ring of the bearing to be riveted, and the riveting ribs are used to press the bearing to be riveted into the workpiece; there are connecting holes on the back of the die for connecting with the press; The diameter of the circular plate structure, there is a through hole in the center of the stripper plate, which is used to pass through the guide and position the shaft head. There are multiple disc spring placement slots on the plate structure, and a ejector rod is installed in the center of each disc spring placement slot. Disc springs are strung on the ejector rod. One end of the ejector rod is fixedly connected with the die, and the other end of the ejector rod has a flange. The unloading plate is limited, and the unloading plate can move axially along the ejector rod.

Beneficial effect

The bearing riveting tooling proposed by the utility model includes functions such as guiding and positioning, riveting, and unloading. Compared with the existing bearing riveting method, it has simple structure, convenient operation for workers, easy and timely and accurate unloading, and can be greatly improved. Improve work efficiency. The disc spring in the unloading part is easy to replace and reliable in operation; the die parts are made of 45 steel, which has been quenched and has a long service life.

Description of drawings

Fig. 1: structural representation of the utility model;

Figure 2: Schematic diagram of the structure of the stamper;

Figure 3: A-A sectional view of the die;

Among them: 1. Positioning sleeve; 2. Work piece; 3. Die; 4. Ejector; 5. Disc spring; 6. Stripping plate; 7. Bearing to be riveted.

Detailed ways

Describe the utility model below in conjunction with specific embodiment:

The product to be processed in this embodiment requires the set pressure of the press to be 2KN, the contact area of each riveting press to be about 3mm ² , and the radial indentation depth to be about 3.5mm.

With reference to accompanying drawing 1, the bearing riveting tooling that present embodiment adopts comprises positioning sleeve 1, die 3, ejector pin 4, disc spring 5 and stripping plate 6.

The positioning sleeve is fixed on the processing base, and the middle part has a positioning through hole for placing the workpiece 2 to be processed and the bearing 7 to be riveted.

With reference to accompanying drawing 2 and accompanying drawing 3, press die is the circular plate structure with guiding and positioning shaft head at the central position, and the diameter of guiding and positioning shaft head matches the inner diameter of bearing 7 to be riveted. Riveted bearing clearance fit. There are riveting ribs arranged around the guide positioning shaft head, the outer contour size of the riveting ribs matches the size of the outer ring of the bearing to be riveted, and the riveting ribs are used to press the bearing to be riveted into the workpiece. In this embodiment, four riveting ribs are evenly distributed on the guide and positioning shaft head. There are connecting holes on the back of the die for connecting with the press.

The unloading plate is a circular plate structure with the same diameter as the die. There is a through hole in the center of the unloading plate, which is used to pass through the guide and position the shaft head. In order to facilitate the riveting process, the riveting ribs pass through the stripper plate. There are four disc spring placement grooves evenly distributed on the plate structure of the unloading plate and the die, and a ejector rod is installed in the center of each disc spring placement groove, and a disc spring is strung on the ejector rod, and one end of the ejector rod is fixed with the thread of the die There is a flange at the other end of the ejector rod to limit the position of the unloading plate, and the unloading plate can move axially along the ejector rod. For example, the unloading plate can move along the ejector rod under the action of an external workpiece to compress the disc spring, or it can be affected by The disc spring moves along the ejector rod to unload the workpiece from the die.

In this embodiment, the pressure of the press is 2KN, the working stroke F _of the die is 3.5mm, four pairs of disc springs are used, and the diameter of the outer circle is D = 32mm. The inner hole Diameter d=10mm, thickness δ=2.0mm, free height h ₀ =2.9mm, limit stroke f _m =0.9mm.

The maximum allowable load of the disc spring at the maximum allowable deformation of 0.65f _m can meet the use requirements.

The number of disc springs in each group is n=F _work /0.5f _m =7.7, and 8 are used for rounding.

The total compression amount f _total of each set of disc springs = 0.65nf _m = 0.65 x 8 x 0.9 = 4.68mm.

_The free height Hfree of each set of disc springs=nh ₀ =8×2.9=23.2mm.

The pre-compression amount _fpre =(0.15～0.2)f _m n=(0.15～0.2)×8×0.9=1.08～1.44mm of each disc spring.

The spring height _Hpre = _Hfree - _fpre =23.2-(1.08～1.44)=21.76～22.12mm of the spring height Hpre=Hfree after the precompression of each group of disc springs, is designed according to 22mm. Get the specific design and use parameters of the disc spring.

When this embodiment is working, first put the bearing to be riveted into the workpiece, put it into the positioning through hole of the positioning sleeve, guide the guide shaft head in the center of the die to guide and position, and rive the bearing through the riveting rib. At this time, the workpiece Drive the unloading plate to compress the disc spring. After the riveting is completed, the die will return upwards, and the disc spring pushes the unloading plate to automatically eject the workpiece, thereby realizing the unloading of the riveting press.

Claims (1)

1. A tooling for bearing riveting, which is characterized in that: it includes a positioning sleeve, a die, a ejector rod, a disc spring and a stripping plate; there is a positioning through hole in the middle of the positioning sleeve; the die is a central position with a guide positioning The circular plate structure of the shaft head, the diameter of the guiding and positioning shaft head matches the inner diameter of the bearing to be riveted, and the gap between the guiding and positioning shaft head and the bearing to be riveted is matched during processing; The outer contour size of the die matches the size of the outer ring of the bearing to be riveted, and the riveting ribs are used to press the bearing to be riveted into the workpiece; there are connecting holes on the back of the die for connecting with the press; The diameter of the circular plate structure, there is a through hole in the center of the stripper plate, which is used to pass through the guide and position the shaft head. There are multiple disc spring placement slots on the plate structure, and a ejector rod is installed in the center of each disc spring placement slot. Disc springs are strung on the ejector rod. One end of the ejector rod is fixedly connected with the die, and the other end of the ejector rod has a flange. The unloading plate is limited, and the unloading plate can move axially along the ejector rod.

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