Manufacturing method and manufacturing device of annular member
A ring-shaped component and manufacturing device technology, applied in the direction of metal rolling, bearing components, shafts and bearings, etc., can solve the problems of high internal stress of metal raw materials, poor roundness of ring-shaped components, and mandrel damage, etc., to achieve Effects of reducing internal stress, reducing stress, and improving accuracy
Active Publication Date: 2019-03-29
NSK LTD
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AI Technical Summary
Problems solved by technology
However, in this technique, when the volume of the metal raw material used is larger than the specified value, the forming space of the metal die is filled with the metal raw material at the stage earlier than the forming rollers complete the extrusion, which may cause the metal raw material to be damaged. Internal stress becomes too high, prone to damage to the mandrel
Even if the mandrel is not damaged, the metal raw material that has nowhere to go in the forming space of the metal mold may be deformed, deteriorating the roundness of the processed annular part
Method used
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[0060] (First example of implementation)
[0061] figure 1 and figure 2 The first example of the embodiment of the present invention is shown. The features of the manufacturing method and manufacturing apparatus of the ring-shaped component of this example are the provision of a structure that restricts the outer diameter of the ring-shaped component 35 after processing, and that it is used to make the metal material 26 during the processing of the metal material 26 The burr avoids the burr along the axial direction. The composition and function of other parts and Figure 23 and Figure 24 The conventional manufacturing method and manufacturing apparatus shown are the same. In addition, this example shows a manufacturing method and a manufacturing apparatus for manufacturing a ring-shaped member for an outer ring by applying a rolling and rolling forming process to the metal raw material 26. However, the manufacturing method and manufacturing apparatus of the annular componen...
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The present invention seeks to realize a structure capable of preventing damage to the mandrel and improving the accuracy of the shape of the processed annular member. The mandrel (23a) is formed by a pair of supporting shaft parts (37a, 37b) arranged concentrically with each other in a state spaced apart in the axial direction, and a roll forming machine concentrically arranged between the pair of supporting shaft parts in the axial direction. Shaft portion (38) constitutes. One support shaft portion (37a) is provided in a state where axial displacement with respect to the roll-forming shaft portion is restricted. The other support shaft portion (37b) is provided in a displaceable state in a direction away from the roll forming shaft portion when a pressing force is applied from the metal material (26).
Description
Technical field [0001] The present invention relates to a method of manufacturing a ring-shaped component such as a race ring for a radial rolling bearing, and a manufacturing device of the ring-shaped component that can be directly used in the implementation of the manufacturing method. Background technique [0002] Assembled in the rotating support part of various rotating machines Figure 21 A radial ball bearing 1 as shown. As the radial ball bearing 1, a single row deep groove type radial ball bearing in which a plurality of balls 4 are rollably provided between an outer ring 2 and an inner ring 3 arranged concentrically with each other is used. In the axial middle part of the inner circumferential surface of the outer ring 2, a deep groove-shaped outer ring rail 5 is formed along the entire circumference, and a deep groove-shaped inner raceway is formed along the entire circumference in the axial middle part of the outer circumferential surface of the inner ring 3 Circle tr...
Claims
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IPC IPC(8): B21H1/12
CPCB21H1/12B21B5/00F16C33/00Y10T29/49668Y10T29/49671Y10T29/49689
Inventor 小林一登安田裕
Owner NSK LTD