Anti-loosening insert installation structure for machining center

Abstract

The utility model provides a mounting structure for anti-loosening inserts of a machining center, comprising: a natural marble base, an expandable nut insert, a screw, and a guide rail, wherein the expandable nut insert is pre-buried in a mounting hole on the natural marble base, the screw passes through the guide rail and is connected to the expandable nut insert, and the expandable nut insert expands outwards through the screw and is interference-fitted with the mounting hole. The utility model reduces or improves the problem of loosening and falling off of nut inserts of natural marble due to long glue time, increases the service life of natural marble nut inserts, and reduces a series of adverse effects on machining center machine tools caused by loosening or falling off of nut inserts.

Description

Technical Field

[0001] The utility model relates to the field of machining centers, in particular to an anti-loosening insert installation structure of a machining center. Background Art

[0002] The base and crossbeam of the machining center are made of natural marble because of its good stability and higher strength. However, due to the material of natural marble, it is impossible to process the holes like steel, so the nut inserts can only be embedded in the natural marble by drilling holes in advance with glue. However, if the glue time is too long, the mutual tension and matching relationship between the screw and the nut insert will cause the natural marble nut insert to loosen or fall off, affecting the stability of the CNC machine tool. Utility Model Content

[0003] The utility model provides an anti-loosening insert installation structure for a machining center to solve at least one of the above technical problems.

[0004] To solve the above-mentioned problem, as one aspect of the utility model, a machining center anti-loosening insert installation structure is provided, comprising: a natural marble base, an expandable nut insert, a screw, and a guide rail. The expandable nut insert is pre-embedded in a mounting hole on the natural marble base. The screw passes through the guide rail and is connected to the expandable nut insert. The expandable nut insert expands outward through the screw and has an interference fit with the mounting hole.

[0005] Preferably, the expandable nut insert comprises a threaded hole, and an expansion dividing groove extending along the axial direction of the threaded hole is formed on the circumferential side wall at the lower end of the threaded hole, and the inner wall diameter of the threaded hole corresponding to the expansion dividing groove gradually decreases.

[0006] Preferably, the lower end of the threaded hole is formed into a cone, and the expansion dividing groove extends to the location of the cone.

[0007] Preferably, at least a portion of the outer surface of the expandable nut insert is bonded to the mounting hole by glue.

[0008] Due to the adoption of the above technical scheme, the utility model installs the guide rail on the natural marble base through the expandable nut insert. After the screws are installed, the natural marble base and the expandable nut insert are transitioned from a clearance fit to an interference fit, thereby making the expandable nut insert more firm, reducing or improving the problem of loosening and falling off of the nut insert of the natural marble due to too long glue time, increasing the service life of the natural marble nut insert, and reducing a series of adverse effects on the machining center machine tool caused by the loosening or falling off of the nut insert. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 The schematic diagram of the exploded structure of the utility model is schematically shown;

[0010] Figure 2 schematically shows a cross-sectional view of an expandable nut insert;

[0011] Figure 3 The cross-sectional structure diagram of the utility model is schematically shown.

[0012] Reference numerals in the figure: natural marble base 1; expandable nut insert 2; screw 3; guide rail 4; threaded hole 5; expansion dividing groove 6; cone 7. DETAILED DESCRIPTION

[0013] The following is a detailed description of the embodiments of the present invention, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0014] As one aspect of the utility model, a machining center anti-loosening insert installation structure is provided, which is used for parts of a machining center machine tool made of natural marble, including: a natural marble base 1, an expandable nut insert 2, a screw 3, and a guide rail 4. The expandable nut insert 2 is pre-embedded in a mounting hole on the natural marble base 1, and the screw 3 passes through the guide rail 4 and is connected to the expandable nut insert 2. The expandable nut insert 2 expands outward through the screw 3 and has an interference fit with the mounting hole.

[0015] Preferably, the expandable nut insert 2 includes a threaded hole 5, and an expansion dividing groove 6 extending along the axial direction of the threaded hole 5 is formed on the circumferential side wall at the lower end of the threaded hole 5, and the inner wall diameter of the threaded hole 5 corresponding to the expansion dividing groove 6 gradually decreases. For example, the thread in the threaded hole 5 may extend downward to the top of the expansion dividing groove 6, or continue to extend downward to at least a part of the expansion dividing groove 6.

[0016] Preferably, the lower end of the threaded hole 5 is formed into a cone 7 , and the expansion dividing groove 6 extends to the location of the cone 7 .

[0017] Preferably, at least a portion of the outer surface of the expandable nut insert 2 is bonded to the mounting hole by glue.

[0018] In the above technical scheme, a threaded hole 5 is formed on the expandable nut insert 2 in the utility model, and an expansion dividing groove 6 is arranged on the circumferential side wall at the bottom 1 / 4 of the lower end of the threaded hole 5. Therefore, the strength of the expandable nut insert 2 will not be affected by the addition of the expansion dividing groove 6, thereby causing the phenomenon of screw thread damage.

[0019] During installation, a mounting hole of a predetermined size is drilled in advance on the natural marble base 1, and the expandable nut insert 2 is embedded in the mounting hole of the natural marble base 1 with glue. After the glue dries, use a tap to clean the glue that has seeped into the thread of the expandable nut insert 2 to avoid affecting the locking of the screw 3 during subsequent installation. Place the guide rail 4 on the guide rail mounting surface of the natural marble base 1, and lock it with the screw 3 connected to the expandable nut insert 2. When the screw 3 rotates to the bottom position of the expandable nut insert 2 and contacts it, the inner wall diameter of the expansion dividing groove 6 gradually decreases. The position of the expansion dividing groove 6 of the expandable nut insert 2 can be expanded to the surroundings through the tensioning principle, and the natural marble base 1 and the expandable nut insert 2 are transitioned from a clearance fit to an interference fit, thereby making the expandable nut insert 2 more secure.

[0020] Due to the adoption of the above-mentioned technical scheme, the utility model installs the guide rail 4 on the natural marble base 1 through the expandable nut insert 2. After the screw 3 is installed, the natural marble base 1 and the expandable nut insert 2 are transitioned from a clearance fit to an interference fit, thereby making the expandable nut insert 2 more firm, reducing or improving the problem of loosening and falling off of the nut insert of natural marble due to too long glue time, increasing the service life of the natural marble nut insert, and reducing a series of adverse effects on the machining center machine tool caused by the loosening or falling off of the nut insert.

[0021] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A structure for preventing loosening of inserts in a machining center, characterized in that: include: A natural marble base (1), an expandable nut insert (2), a screw (3), and a guide rail (4); the expandable nut insert (2) is pre-buried in a mounting hole on the natural marble base (1); the screw (3) passes through the guide rail (4) and is connected to the expandable nut insert (2); the expandable nut insert (2) expands outwards through the screw (3) and is interference-fitted with the mounting hole.

2. The anti-loosening insert installation structure of the machining center according to claim 1, characterized in that: The expandable nut insert (2) comprises a threaded hole (5), and an expansion dividing groove (6) extending along the axial direction of the threaded hole (5) is provided on the circumferential side wall at the lower end of the threaded hole (5), and the inner wall diameter of the threaded hole (5) corresponding to the expansion dividing groove (6) gradually decreases.

3. The anti-loosening insert installation structure of the machining center according to claim 2, characterized in that: The lower end of the threaded hole (5) is formed into a cone (7), and the expansion dividing groove (6) extends to the position where the cone (7) is located.

4. The anti-loosening insert installation structure of a machining center according to claim 1, characterized in that: At least a portion of the outer surface of the expandable nut insert (2) is bonded to the mounting hole by glue.

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