Butterfly-shaped movable single-ear pallet self-locking nut support machining and assembling method

Abstract

This invention provides a processing and assembly method for a butterfly-shaped movable single-ear support plate self-locking nut bracket, comprising the following steps: S1: cutting the bracket plate; S2: using a bending die to bend both sides of the bracket plate, pressing out a curved arc on both sides of the bracket plate; S3: fixing the bracket plate on a first bending die for a first bending process; S4: assembling the self-locking nut on a second bending die, then fitting the bracket plate onto the self-locking nut for a second bending process. The bending die, the first bending die, and the second bending die have corresponding upper dies. The processing and assembly method for the butterfly-shaped movable single-ear support plate self-locking nut bracket provided by this invention can process multiple butterfly-shaped movable single-ear support plate self-locking nuts simultaneously, achieving high processing accuracy and speed, and solving the assembly problem of the self-locking nut and the bracket, greatly improving the speed of production and manufacturing.

Description

Technical Field

[0001] This invention belongs to the technical field of manufacturing of butterfly-shaped movable single-ear support plate self-locking nut brackets, specifically relating to a processing and assembly method for butterfly-shaped movable single-ear support plate self-locking nut brackets. Background Technology

[0002] In the field of aerospace equipment manufacturing, butterfly-shaped movable single-ear self-locking nuts are widely used to provide a fastening effect. Their structure consists of two parts: a nut and a bracket, which need to be assembled together. For example, the utility model patent with patent application number CN201420795557.4 discloses a single-ear movable bracket double-thread self-locking nut. The nut has a lug that locks into an opening on the bracket to fix the nut in position. This assembly method makes the manufacturing process relatively cumbersome and complex, requiring one-to-one processing. Due to the large quantity used in aerospace equipment, the complex operating environment, especially the high temperature environment of 300°C to 400°C, and the fact that it is a part with a high failure rate, the need to ensure processing quality further reduces the processing speed, resulting in a long production preparation cycle and the inability to deliver batch products to users on time. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a processing and assembly method for a butterfly-shaped movable single-ear support plate with a self-locking nut. The method employs a multi-part mold manufacturing process, which is divided into four steps. During processing, the bending of the support and the assembly of the nut with the support are simultaneously completed. Specifically, the method includes the following steps:

[0004] A method for processing and assembling a butterfly-shaped movable single-ear support plate with a self-locking nut includes the following steps:

[0005] S1: Cut the bracket plate. Place the plate on the cutting equipment and cut the bracket plate according to the stamping development diagram of the bracket.

[0006] S2: Use a bending die to bend both sides of the bracket plate, and bend the two sides of the bracket plate into a bending arc. The bending arc is determined according to the shape of the self-locking nut, basically ensuring that it is concentric with the outer circumference of the self-locking nut, so that the self-locking nut can have a certain range of movement when it is assembled on the bracket.

[0007] S3: After bending the two sides of the bracket plate, fix it on the first bending die and perform the first bending process on both sides, bending it inward at a certain angle so that the self-locking nut can be smoothly inserted into the opening on the bracket plate.

[0008] S4: First, assemble and fix the self-locking nut on the second bending die. After defining its position, put the bracket plate on the self-locking nut and fix it to form a preliminary combination. Then, use the second bending die to perform a second bend to shape the bracket plate into the final required shape.

[0009] As someone skilled in the art, one can imagine that the bending die, the first bending die, and the second bending die have corresponding upper dies to achieve the effect of stamping.

[0010] When bending the support plate, the upper surface of the bending die has fixing protrusions that engage with two holes on the bent plate to fix the support plate in position and prevent displacement. Correspondingly, grooves with an arc shape are provided on the upper surface of the bending die, the arc being determined according to the bending arc, to press the arc shape onto both sides of the support plate during the stamping process. To allow for bending multiple support plates simultaneously, multiple fixing protrusions and grooves are evenly distributed on the upper surface of the bending die.

[0011] In step S3, the first bending of the support plate is performed using a first bending die. The support plate is fixed to the first bending die, and then both sides are bent inward at a 60° angle. To achieve the bending of the support plate, a sloping boss is provided on the first bending die. The included angle between the two inclined surfaces of the sloping boss is 60°. According to geometric angle conversion, the angle between the two inclined surfaces and the top surface of the boss is 120°. This allows the two sides of the support plate to be bent inward at a 60° angle. To prevent displacement of the support plate during processing, a fixing pin is provided on the sloping boss to pass through the hole in the support plate for fixation. During processing, multiple sloping bosses can be provided on the first bending die and connected in a row, allowing multiple support plates to be bent simultaneously.

[0012] In step S4, the second bending die is equipped with a rectangular boss. Compared to the inclined boss on the first bending die, the two sides of the rectangular boss are perpendicular to the top surface, allowing the sides of the support plate to be bent to 90°. The surface of the rectangular boss has nut fixing holes and locating pins. The nut fixing holes are used to insert self-locking nuts, and the locating pins are used to pass through holes in the support plate for fixing. During processing, multiple rectangular bosses can be set on the second bending die and connected in a row, allowing multiple support plates to be bent simultaneously.

[0013] The processing and assembly method of the butterfly-shaped movable single-ear support plate self-locking nut bracket provided by the present invention can process multiple butterfly-shaped movable single-ear support plate self-locking nuts at the same time. It has high processing accuracy and fast speed, and can solve the assembly problem of self-locking nuts and brackets, greatly improving the speed of production and manufacturing. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings.

[0015] Figure 1 A schematic diagram of the combined structure of the self-locking nut and the bracket plate;

[0016] Figure 2 This is a schematic diagram of the unfolded structure of the support plate.

[0017] Figure 3 This is a schematic diagram of a single-unit bending die structure.

[0018] Figure 4 A schematic diagram of the bending die in use;

[0019] Figure 5 This is a schematic diagram of the structure after the support plate is bent.

[0020] Figure 6 This is a schematic diagram of the first bending die structure;

[0021] Figure 7 This is a schematic diagram of the first bending die in use.

[0022] Figure 8 This is a schematic diagram of the structure of the support plate after the first bend;

[0023] Figure 9 This is a schematic diagram of the second bending die structure;

[0024] Figure 10 This is a side view of the second bending die in use.

[0025] Figure 11 A three-dimensional structural diagram of the second bending die in use.

[0026] The figure shows: 1-bending die; 2-first bending die; 3-second bending die; 4-support plate; 5-fixing protrusion; 6-groove; 7-sloping boss; 8-fixing pin; 9-rectangular boss; 10-nut fixing hole; 11-positioning pin; 12-self-locking nut. Detailed Implementation

[0027] To further illustrate the concept of the present invention, the specific embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0028] A method for processing and assembling a butterfly-shaped movable single-ear support plate with a self-locking nut, wherein the self-locking nut 12 and the support plate 4 are joined as follows: Figure 1As shown, before processing, the bending die 1, the first bending die 2, and the second bending die 3 are prepared. The bending die 1, the first bending die 2, and the second bending die 3 have corresponding upper dies.

[0029] Bending die 1 Figure 3 As shown, the surface is provided with fixing protrusions 5, which correspond to the holes on the support plate 4. An arc-shaped groove 6 is formed on the side of the support plate 4 that needs to be bent. The arc of the groove 6 is determined according to the required bending arc. Ten sets of fixing protrusions 5 and grooves 6 are evenly distributed on the surface of the bending die 1, arranged in two rows, as shown. Figure 4 As shown.

[0030] The first bending die 2 has a sloping boss 7, such as Figure 6 As shown, the included angle between the two inclined surfaces of the inclined boss 7 is 60°. Six sets of fixing pins 8 are equidistantly arranged on the inclined boss 7. The fixing pins 8 match the holes on the bracket plate 4 and are used to pass through the holes on the bracket plate 4 for fixing.

[0031] The second bending die 3 is provided with a rectangular boss 9, such as Figure 9 As shown, the two sides of the rectangular boss 9 are perpendicular to the top surface. Six sets of nut fixing holes 10 and positioning pins 11 are provided on the surface of the rectangular boss 9. The nut fixing holes 10 are used to insert self-locking nuts 12, and the positioning pins 11 are used to pass through the holes on the bracket plate 4 for fixing.

[0032] After preparing the mold, the processing steps are as follows:

[0033] S1: Place the sheet metal on the cutting equipment and cut out the bracket plate 4 according to the stamping development diagram of the bracket, such as... Figure 2 As shown;

[0034] S2: The cut support plate 4 is fixed to the mold using the fixing protrusion 5. Each bending die 1 can hold 10 support plates 4 at the same time. Figure 4 As shown, the sides are then bent using the groove 6 through the bending die 1, forming a curved arc on both sides of the bracket plate 4, as shown. Figure 5 As shown;

[0035] S3: After bending both sides of the bracket plate 4, fix it to the first bending die 2 using fixing pins 8. Six bracket plates 4 are fixed to each die. Figure 7 As shown, the two sides of the bracket plate 4 are then bent inwards by 60° using the two sides of the inclined boss 7. Figure 8 As shown;

[0036] S4: First, assemble and fix the self-locking nut 12 onto the second bending die 3 through the nut fixing hole 10, and then fix its position by fitting the bracket plate 4 onto the self-locking nut 12, and let the positioning pin 11 pass through the hole on the bracket plate 4, such as... Figure 10 As shown, six bracket plates 4 can be processed at once, such as... Figure 11 As shown, the two sides of the bracket plate 4 are further bent to 90° by the rectangular boss 9, thus completing all the processing.

[0037] This invention divides the processing into four steps. The bending of both sides of the bracket plate 4 is carried out in two steps. The first bend is 60°, which makes it easy to put the lug of the self-locking nut 12 into the bracket plate 4. Then the second bend is carried out. Through the two bends, the self-locking nut 12 and the bracket plate 4 are assembled together, and the processing of the entire device is completed, which solves the problem of slow processing speed.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Various modifications and variations can be made by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made using the present invention should be included within the protection scope of the present invention.

Claims

1. A method for processing and assembling a butterfly-shaped movable single-ear support plate self-locking nut bracket, characterized in that, Includes the following steps: S1: Cut the bracket plate (4); S2: Use the bending die (1) to bend both sides of the bracket plate (4) to press out the bending arc on both sides of the bracket plate (4); The upper surface of the bending die (1) is provided with a fixed protrusion (5) and a groove (6) is provided in the part corresponding to both sides of the support plate (4). The groove (6) has an arc. Multiple fixed protrusions (5) and grooves (6) are uniformly provided on the upper surface of the bending die (1). S3: Fix the bracket plate (4) on the first bending die (2) for the first bending process; the first bending die (2) is provided with multiple inclined bosses (7) in a row, the included angle between the two inclined surfaces is 60°, and the inclined bosses (7) have fixing pins (8). S4: Assemble the self-locking nut (12) onto the second bending die (3), and then put the bracket plate (4) onto the self-locking nut (12) and fix it for the second bending; the second bending die (3) is provided with multiple rectangular bosses (9) arranged in a row, and the surface of the rectangular bosses (9) is provided with nut fixing holes (10) and positioning pins (11). The bending die (1), the first bending die (2), and the second bending die (3) have corresponding upper dies.

2. The processing and assembly method of the butterfly-shaped movable single-ear support plate self-locking nut bracket according to claim 1, characterized in that: In step S3, the bracket plate (4) is fixed on the first bending mold (2) and bent inward by 60° on both sides.

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