Bending die for tray self-locking nut

Abstract

The utility model discloses a tray self-locking nut bending die, and belongs to the technical field of fastener machining. The die comprises a lower die body and an upper die body, an arc-shaped forming groove is formed in the top of the lower die body, a process groove is formed in the bottom of the arc-shaped forming groove, tray positioning grooves are formed in the positions, at the two arc-shaped ends of the arc-shaped forming groove, of the lower die body, and the upper die body is located on the upper side of the lower die body. An arc-shaped forming boss is arranged at the position, corresponding to the arc-shaped forming groove, of the bottom of the upper die. The lower die is fixedly installed on a working platform of a hydraulic machine, the upper die is fixedly installed on an execution part of the hydraulic machine, the tray self-locking nut before bending forming is placed on the lower die, and after the tray self-locking nut is positioned, the upper die is driven by the hydraulic machine to move downwards; the tray self-locking nut is bent and formed through cooperation of the arc-shaped forming boss and the arc-shaped forming groove, and the size precision of the bent and formed tray self-locking nut meets the requirement.

Description

Technical Field

[0001] The utility model relates to a pallet self-locking nut bending die and belongs to the technical field of fastener processing. Background Art

[0002] In the field of aero-engines, some important parts are equipped with self-locking nuts, angle washers, slotted nuts and other parts. Self-locking nuts and other parts are fasteners with self-locking function. The principle is mainly to use the design structure of the nut itself and the relevant material properties. When subjected to high temperature, external force vibration or other influences, it can still ensure the automatic locking effect to prevent the nut from loosening. For pallet self-locking nuts, their shape must be highly consistent with the shape of the finished parts, but the process performance of pallet self-locking nuts requires that their outer dimensions should not be obtained by cutting as much as possible, so the bending forming processing method is adopted to ensure the continuity of the part material fiber, so that the relevant mechanical properties of the pallet self-locking nuts can be guaranteed.

[0003] The structure of the pallet self-locking nut obtained after CNC milling, chamfering of the threaded hole, tapping and wire cutting is as follows: Figure 1 As shown, the tray self-locking nut needs to be bent into Figure 2 The structure shown, the dimensional accuracy of the bending will directly affect the assembly quality, and affect the stability of the engine connector and its operating safety. Therefore, how to achieve the bending forming of the pallet self-locking nut is a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a pallet self-locking nut bending die.

[0005] The utility model is realized through the following technical solutions:

[0006] A pallet self-locking nut bending mold comprises a lower mold and an upper mold, wherein the top of the lower mold is provided with an arc-shaped molding groove, the bottom of the arc-shaped molding groove is provided with a process groove, and the lower mold is provided with pallet positioning grooves at both arc-shaped ends of the arc-shaped molding groove. The upper mold is located on the upper side of the lower mold, and the bottom of the upper mold is provided with an arc-shaped molding boss at a position corresponding to the arc-shaped molding groove.

[0007] The process groove extends along the axial direction of the arc-shaped molding groove until it is connected to one of the side surfaces of the lower mold.

[0008] The upper die is also movably connected to the lower die through a plurality of positioning pins arranged side by side.

[0009] A blind hole is provided on the lower die at a position corresponding to the positioning pin, and the blind hole is tightly matched with the positioning pin.

[0010] A through hole is provided on the upper die at a position corresponding to the positioning pin, and the through hole is in clearance fit with the positioning pin.

[0011] The beneficial effects of the utility model are as follows: the lower die is fixedly mounted on the working platform of the hydraulic press, the upper die is fixedly mounted on the actuator of the hydraulic press, the self-locking nut of the pallet before bending and forming is placed on the lower die, and the side surfaces of the two pallet positioning grooves are used to position the end faces of both ends of the pallet, and then the front side surface of the pallet is made coplanar with the front side surface of the lower die to realize the positioning of the self-locking nut of the pallet, and then the upper die is driven downward by the hydraulic press, and the self-locking nut of the pallet is bent and formed by cooperating with the arc-shaped forming boss and the arc-shaped forming groove, and the dimensional accuracy of the self-locking nut of the pallet after bending and forming meets the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the structure of the pallet self-locking nut before bending and forming;

[0013] Figure 2 This is a schematic diagram of the structure of the pallet self-locking nut after bending and forming;

[0014] Figure 3 It is a structural schematic diagram of the utility model;

[0015] Figure 4 It is a schematic diagram of the top view of the lower mold of the utility model;

[0016] Figure 5 for Figure 4 Sectional view along CC;

[0017] Figure 6 It is a schematic diagram of the top structure of the upper mold of the utility model;

[0018] Figure 7 for Figure 6 Section view along AA.

[0019] In the figure: 1-tray self-locking nut, 10-tray, 11-nut closing platform, 2-lower die, 3-upper die, 4-locating pin, 20-blind hole, 21-process groove, 22-arc forming groove, 23-tray positioning groove, 30-through hole, 31-arc forming boss. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0021] like Figures 1 to 7As shown, a pallet self-locking nut bending mold described in the utility model includes a lower mold 2 and an upper mold 3, the top of the lower mold 2 is provided with an arc-shaped molding groove 22, the bottom of the arc-shaped molding groove 22 is provided with a process groove 21, and the lower mold 2 is provided with a pallet positioning groove 23 at both arc ends of the arc-shaped molding groove 22, the upper mold 3 is located on the upper side of the lower mold 2, and the bottom of the upper mold 3 is provided with an arc-shaped molding boss 31 at a position corresponding to the arc-shaped molding groove 22. When in use, the widths of the lower mold 2 and the upper mold 3 are consistent with the width of the pallet 10. The lower mold 2 is fixed to the working platform of the hydraulic press, and the upper mold 3 is fixed to the actuator of the hydraulic press. Figure 1 The pallet self-locking nut 1 before bending is placed on the lower die 2, and the two end faces of the pallet 10 are positioned by using the sides of the two pallet positioning grooves 23, and then the front side of the pallet 10 is made coplanar with the front side of the lower die 2 to achieve the positioning of the pallet self-locking nut 1. Next, the upper die 3 is driven downward by the hydraulic press, and the pallet self-locking nut 1 is bent and formed by the arc-shaped forming boss 31 and the arc-shaped forming groove 22. After bending and forming, the dimensional accuracy of the pallet self-locking nut 1 meets the requirements, and its structure is as shown in FIG. Figure 2 shown.

[0022] The process groove 21 extends along the axial direction of the arc-shaped forming groove 22 until it is connected to one of the side surfaces of the lower die 2. The process groove 21 is used to avoid the nut closing platform 11 during the bending process of the pallet self-locking nut 1; the process groove 21 extends along the axial direction of the arc-shaped forming groove 22 and is connected to one of the side surfaces of the lower die 2, so as to facilitate the removal of the bent pallet self-locking nut 1 from the lower die 2 along the width direction of the lower die 2.

[0023] The upper die 3 is also movably connected to the lower die 2 via a plurality of positioning pins 4 arranged side by side.

[0024] The lower die 2 is provided with a blind hole 20 at a position corresponding to the positioning pin 4, and the blind hole 20 is tightly matched with the positioning pin 4. The positioning pin 4 is tightly matched with the blind hole 20 and fixedly installed on the lower die 2.

[0025] The upper die 3 is provided with a through hole 30 at a position corresponding to the positioning pin 4, and the through hole 30 is clearance-matched with the positioning pin 4. The positioning pin 4 is clearance-matched with the through hole 30, that is, the positioning pin 4 is slidably connected with the through hole 30. The relative position of the lower die 2 and the upper die 3 is positioned by the positioning pin 4, which helps to improve the bending accuracy and bending quality of the pallet self-locking nut 1.

Claims

1. A pallet self-locking nut bending die, characterized in that: The invention comprises a lower die (2) and an upper die (3), wherein the top of the lower die (2) is provided with an arc-shaped molding groove (22), the bottom of the arc-shaped molding groove (22) is provided with a process groove (21), the lower die (2) is provided with tray positioning grooves (23) at both arc-shaped ends of the arc-shaped molding groove (22), the upper die (3) is located on the upper side of the lower die (2), and the bottom of the upper die (3) is provided with an arc-shaped molding boss (31) at a position corresponding to the arc-shaped molding groove (22).

2. The pallet self-locking nut bending mold according to claim 1, characterized in that: The process groove (21) extends along the axial direction of the arc-shaped molding groove (22) until it is connected to one of the side surfaces of the lower mold (2).

3. The pallet self-locking nut bending mold according to claim 1, characterized in that: The upper die (3) is also movably connected to the lower die (2) via a plurality of positioning pins (4) arranged side by side.

4. The pallet self-locking nut bending die according to claim 3, characterized in that: A blind hole (20) is provided on the lower die (2) at a position corresponding to the positioning pin (4), and the blind hole (20) is tightly matched with the positioning pin (4).

5. The pallet self-locking nut bending mold according to claim 3, characterized in that: A through hole (30) is provided on the upper die (3) at a position corresponding to the positioning pin (4), and the through hole (30) is clearance-matched with the positioning pin (4).

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