A device for sizing the inner and outer diameters of the ends of seamless steel pipes
A seamless steel pipe, inner and outer diameter technology, applied in the seamless steel pipe end inner and outer diameter sizing device, seamless steel pipe end finishing and sizing field, can solve the problems of waste, end inner diameter and outer diameter with low dimensional accuracy, etc. Achieve the effect of improving ellipse precision
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Embodiment 1
[0026] In order to solve the problems of low dimensional accuracy of the inner diameter and outer diameter of the end in the production and use of seamless steel pipes at home and abroad, and when the end is sized, only the end with a size out of tolerance can only be cut off, resulting in great waste. The present invention provides a figure 1 The device for sizing the inner and outer diameters of the ends of seamless steel pipes is mainly suitable for finishing and sizing the ends of seamless steel pipes with an outer diameter of 1000 mm to 1500 mm.
[0027] The sizing device includes a base 5; a front beam 6 and a rear beam 12 that are slidably arranged on the base 5, and the front beam 6 and the rear beam 12 are connected by a guide tension rod 7; the front beam 6 is connected with a A radially movable outer sizing mold 1, the outer sizing mold 1 is provided with a radially movable inner sizing mold 2, the outer circle 19 of the inner sizing mold 2 A sizing cavity 20 for i...
Embodiment 2
[0033] On the basis of Example 1, such as figure 1 with Figure 4 As shown, the inside of the front beam 6 is provided with a first slope 13, and the outside of the outer sizing mold 1 is provided with a second slope 14, and the first slope 13 and the second slope 14 are in oblique contact with each other. , so that the front beam 6 and the outer sizing section mold 1 cooperate with each other through inclined surfaces. The reason why an inclined surface instead of a conical surface is provided on the outside of the outer sizing segmented mold 1 is that the inclined surface is more convenient to process.
[0034] Such as Figure 4 with Figure 5As shown, the front beam 6 is connected to the outer sizing segmented mold 1 through a first dovetail guiding structure in the radial direction. The first dovetail guide structure includes a first dovetail arranged on the first slope 13, a first dovetail groove 16 arranged on the second slope 14, and the first dovetail is located in...
Embodiment 3
[0038] On the basis of Example 1, such as figure 1 As shown, the end of the inner piston rod 4 is conical as a whole, and the inside of the inner fixed-diameter segmented mold 2 is provided with a conical hole, and the conical end is located in the conical hole. The tapered holes are matched so that the axial movement of the inner piston rod 4 is transformed into the radial movement of the inner sizing segmented mold 2 .
[0039] Such as Figures 6 to 7 As shown, the conical surface of the end of the inner piston rod 4 is radially connected to the inner tapered hole surface of the inner sizing segment mold 2 through the third dovetail structure; the third dovetail structure includes the third Dovetail and the 3rd dovetail groove 24, described 3rd dovetail groove 24 is arranged on the inner taper hole surface of described inner sizing section mold 2, and described the 3rd dovetail is arranged on the cone of the end of described inner piston rod 4 On the surface, the third dov...
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