A whole type core rod quick change adjusting mechanism

Abstract

The utility model discloses a kind of whole profile core rod quick-change adjusting mechanism in powder metallurgy field, including core rod support plate and core rod connecting rod, vertical through-hole is set on core rod support plate, the lower portion of core rod connecting rod is equipped with threaded section, threaded section of core rod connecting rod is set through through-hole axially, threaded section of core rod connecting rod is successively respectively equipped with upper nut, shaft sleeve and lower nut from top to bottom, lower nut is pressed to the downside of core rod support plate, shaft sleeve is filled with between core rod connecting rod threaded section and through-hole inner wall correspondingly, shaft sleeve upper end is equipped with the outer step of supporting on the upper surface of core rod support plate, upper nut is pressed to shaft sleeve upper end face, the outer diameter of upper nut, lower nut is all less than through-hole inner diameter. The utility model can satisfy the demand of quick loading and taking, realize that core rod connecting rod is quickly taken out from pit, while ensure that each nut is not loose when core rod connecting rod is stressed, axial positioning is stable and reliable.

Description

Technical Field

[0001] This utility model belongs to the field of powder metallurgy, and specifically relates to a quick-change adjustment mechanism for shaping mandrels. Background Technology

[0002] Powder metallurgy shaping mandrels are a key high-precision mold on powder metallurgy production lines. They are specifically used to refine and calibrate the internal dimensions and shapes of metal powder parts (such as gears, connecting rods, and structural components) to ensure that the final products meet stringent tolerance requirements.

[0003] Quickly removing the mandrel connector from the pit is of great practical significance for improving mold changing efficiency, reducing the labor intensity of mold changing personnel, increasing machine uptime, and effectively utilizing mold changing space.

[0004] In the prior art, in order to facilitate the quick removal of the mandrel connector from the pit, the mandrel connector is fixed to the mandrel support plate with two separate nuts and the axial position is adjusted. The disadvantage is that when the mandrel connector is under force, the locking screws of the separate nuts are easy to loosen under the action of external force, resulting in the failure of the separate nut locking. Utility Model Content

[0005] The purpose of this utility model is to provide a quick-change adjustment mechanism for the mandrel, which can meet the needs of rapid loading and unloading, realize the quick removal of the mandrel connector from the pit, and at the same time ensure that the nuts of the mandrel connector do not loosen when under force, and that the axial positioning is stable and reliable.

[0006] The purpose of this utility model is achieved as follows: A quick-change adjustment mechanism for a shaped mandrel includes a mandrel support plate and a mandrel connecting rod. The mandrel support plate has a vertically oriented through hole, and the lower part of the mandrel connecting rod has a threaded section. The threaded section of the mandrel connecting rod passes axially through the through hole. From top to bottom, the threaded section of the mandrel connecting rod is fitted with an upper nut, a bushing, and a lower nut. The lower nut presses against the lower side of the mandrel support plate. The bushing is correspondingly filled between the threaded section of the mandrel connecting rod and the inner wall of the through hole. The upper end of the bushing has an outer step that supports the upper surface of the mandrel support plate. The upper nut presses against the upper end face of the bushing. The outer diameters of both the upper and lower nuts are smaller than the inner diameter of the through hole.

[0007] The mandrel connector of this invention is fixed to the mandrel support plate by three integral nuts, which can be loosened for axial position adjustment. Double nuts are used above the mandrel support plate to prevent loosening. The opening diameter of the mandrel support plate is larger than the rotation diameter of the nuts, allowing the mandrel connector to be quickly removed from the pit after loosening the nuts. A split-type bushing is inserted between the inner wall of the mounting hole and the mandrel connector to bear axial load and provide axial positioning, ensuring reliable positioning and stable force balance. This structural design meets the need for rapid installation and removal of the mandrel connector while ensuring that the nuts do not loosen under load, maintaining a stable and reliable axial position. Compared with the prior art, the advantages of this invention are: it meets the need for rapid installation and removal, enabling the mandrel connector to be quickly removed from the pit, while ensuring that the nuts do not loosen under load, maintaining stable and reliable axial positioning.

[0008] As a further improvement of this utility model, the mandrel connecting rod is perpendicular to the mandrel support plate.

[0009] As a further improvement of this utility model, a thin nut is also fitted on the threaded section of the mandrel connector to tighten the upper nut. The thin nut, upper nut, and lower nut are all integral nuts. The mandrel connector is locked and fixed to the mandrel support plate by the three nuts, ensuring stable and reliable force distribution and preventing the mandrel connector from loosening.

[0010] As a further improvement of this utility model, a washer is fitted onto the threaded section of the mandrel connecting rod, located between the mandrel support plate and the lower nut. The washer securely connects the lower nut to the mandrel support plate, preventing the lower nut from dislodging from the opening in the mandrel support plate.

[0011] As a further improvement of this utility model, the bushing is a split bushing, comprising two symmetrical half-bodies. The bushing composed of the two half-bodies is more convenient to install between the inner wall of the through hole of the mandrel connecting rod and the mandrel support plate, and the assembled bushing positions the mandrel connecting rod.

[0012] As a further improvement of this utility model, the mandrel connecting rod is connected to the middle of the mandrel support plate, and four rectangular machine base connecting columns are vertically installed on the mandrel support plate around the mandrel connecting rod. The machine base is connected to the powder metallurgy equipment via these connecting columns. Attached Figure Description

[0013] Figure 1 This is a top view of the present invention.

[0014] Figure 2 for Figure 1 CC-direction sectional view.

[0015] Figure 3 This is a three-dimensional structural diagram of the present invention.

[0016] Among them, 1 is the mandrel support plate, 2 is the mandrel connecting rod, 2a is the threaded section, 3 is the through hole, 4 is the upper nut, 5 is the bushing, 5a is the outer step, 501 is the half body, 6 is the lower nut, 7 is the thin nut, 8 is the washer, and 9 is the machine base connecting column. Detailed Implementation

[0017] like Figure 1-3 As shown, a quick-change adjustment mechanism for a mandrel includes a mandrel support plate 1 and a mandrel connecting rod 2, which is perpendicular to the mandrel support plate 1. A through hole 3 is vertically formed on the mandrel support plate 1. A threaded section 2a is provided at the lower part of the mandrel connecting rod 2, which axially passes through the through hole 3. From top to bottom, an upper nut 4, a bushing 5, and a lower nut 6 are sequentially fitted onto the threaded section 2a of the mandrel connecting rod 2. The lower nut 6 presses against the lower side of the mandrel support plate 1, and the bushing 5 is correspondingly filled into the mandrel connecting rod. Between the threaded section 2a and the inner wall of the through hole 3, the upper end of the bushing 5 is provided with an outer step 5a that supports the upper surface of the mandrel support plate 1. The bushing 5 is a split bushing 5, which includes two left and right symmetrical half-bodies 501. The bushing 5 composed of the two half-bodies 501 is more convenient to install between the mandrel connecting rod 2 and the inner wall of the through hole 3 of the mandrel support plate 1. The combined bushing 5 positions the mandrel connecting rod 2. The upper nut 4 presses the upper end face of the bushing 5. The outer diameters of the upper nut 4 and the lower nut 6 are both smaller than the inner diameter of the through hole 3.

[0018] A thin nut 7, which presses against the upper nut 4, is also fitted onto the threaded section 2a of the mandrel connector 2. The thin nut 7, upper nut 4, and lower nut 6 are all integral nuts. These three nuts lock the mandrel connector 2 to the mandrel support plate 1 securely, ensuring stable and reliable force distribution and preventing the mandrel connector 2 from loosening. A washer 8 is fitted onto the threaded section 2a of the mandrel connector 2, located between the mandrel support plate 1 and the lower nut 6. The washer 8 secures the lower nut 6 to the mandrel support plate 1, preventing it from coming out of the opening in the mandrel support plate 1.

[0019] The mandrel connector 2 is connected to the middle of the mandrel support plate 1. Four rectangular machine base connecting columns 9 are vertically installed on the mandrel support plate 1 around the mandrel connector 2. The machine base is connected to the powder metallurgy equipment through the connecting columns.

[0020] The mandrel connector 2 of this invention is fixed to the mandrel support plate 1 by three integral nuts, which can be loosened for axial position adjustment. Double nuts are used above the mandrel support plate 1 to prevent loosening. The opening diameter of the mandrel support plate 1 is larger than the rotation diameter of the nuts. After loosening the nuts, the mandrel connector 2 can be quickly removed from the pit by leaving the through hole 3. A split bushing 5 is filled between the inner wall of the mounting hole and the mandrel connector 2 to bear the axial load and provide axial positioning, ensuring reliable positioning and stable force balance. This structural design meets the need for quick installation and removal of the mandrel connector 2, while ensuring that the nuts do not loosen when the mandrel connector 2 is under load, and maintaining a stable and reliable axial position. The advantages of this invention are: it can meet the need for quick installation and removal, enabling the mandrel connector 2 to be quickly removed from the pit, while ensuring that the nuts do not loosen when the mandrel connector 2 is under load, and maintaining a stable and reliable axial positioning.

[0021] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. A quick-change adjustment mechanism for shaping mandrels, comprising a mandrel support plate and a mandrel connecting rod, wherein the mandrel support plate has a vertically through hole, and the lower part of the mandrel connecting rod has a threaded section, the threaded section of the mandrel connecting rod being axially disposed through the through hole, characterized in that, The threaded section of the mandrel connector is fitted with an upper nut, a bushing, and a lower nut from top to bottom. The lower nut presses against the lower side of the mandrel support plate. The bushing is correspondingly filled between the threaded section of the mandrel connector and the inner wall of the through hole. The upper end of the bushing is provided with an outer step that supports the upper surface of the mandrel support plate. The upper nut presses against the upper end face of the bushing. The outer diameters of both the upper and lower nuts are smaller than the inner diameter of the through hole.

2. The mandrel quick-change adjustment mechanism of claim 1, wherein The mandrel connector is perpendicular to the mandrel support plate.

3. A mandrel quick-change adjustment mechanism according to claim 1 or 2, characterized in that The threaded section of the mandrel connector is also fitted with a thin nut that presses against the upper nut. The thin nut, the upper nut, and the lower nut are all integral nuts.

4. The mandrel quick-change adjustment mechanism of claim 1 or 2, wherein A washer is fitted on the threaded section of the mandrel connector between the mandrel support plate and the lower nut.

5. The mandrel quick-change adjustment mechanism of claim 1 or 2, wherein The bushing is a split bushing, which consists of two symmetrical half-bodies.

6. A mandrel quick-change adjustment mechanism according to claim 1 or 2, wherein The mandrel connector is connected to the middle of the mandrel support plate, and four machine base connecting columns forming a rectangle are vertically installed around the mandrel connector on the mandrel support plate.

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