A junction box housing and its five-axis CNC machining method

Abstract

The present invention relates to a junction box housing and a five-axis linkage machine tool CNC machining method thereof, wherein the housing comprises a main body (1) with openings at both ends, a fixing portion (2) being provided at one end of the main body (1), and a wiring portion (3) being provided at the other end of the main body (1), wherein the wiring portion (3) comprises an inlet (31) and an outlet (32), a limiting hole (33) being provided on the outside of the inlet (32), and an annular boss (34) being provided on the outside of the outlet (32), and a keyway (21) being provided in an annular manner on the fixing portion (2). Compared with the prior art, the present invention has the advantages of a strong ability to fix the wires, and the machining method of the present invention only requires disassembly, reversal and clamping once during machining, which effectively avoids the errors generated during machining by the traditional machining method, and solves the problems of improper machining surface selection, confusing steps, complicated machining procedures, and multiple disassembly and assembly affecting the precision encountered in the machining and production of housing parts.

Description

Technical Field

[0001] The invention relates to the technical field of electrical equipment, and in particular to a junction box housing and a five-axis linkage machine tool numerical control machining method thereof. Background Art

[0002] In home decoration, the junction box is one of the electrical auxiliary materials, because the wires used for decoration pass through the wire tube, and the junction box is used as a transition at the joint of the wires (for example, the line is long, or the wire tube needs to turn). The wire tube is connected to the junction box, and the wires in the wire tube are connected in the junction box, which plays a role in protecting and connecting the wires.

[0003] Invention patent CN201210087408.8 discloses a junction box housing, including a square housing with an open upper side, a first wiring hole is provided on the bottom plate and two opposite side walls of the square housing, and symmetrically provided with protrusions along the direction of the side walls and perpendicular to the bottom plate on the inner side of the other two opposite side walls of the square housing, the protrusions extend to the bottom plate of the square housing, and grooves are provided on the outer side surfaces of the other two opposite side walls and at the corresponding lower ends of the protrusions, the center lines of the grooves and the protrusions coincide, and a connecting hole parallel to the side wall is provided in the center of the protrusion along the direction perpendicular to the bottom plate, and threads are provided in the connecting hole, and the upper end of the connecting hole opens to the upper side of the protrusion, and the lower end opens to the groove. The junction box housing has a simple structure, and is very convenient and quick to install and use. However, the fixing ability of the junction box housing to the wiring to be connected is weak, and the wiring to be connected is prone to displacement. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a junction box housing and a five-axis linkage machine tool CNC machining method thereof, which has a strong ability to fix the wires.

[0005] The object of the present invention can be achieved through the following technical scheme: a junction box shell, including a main body with openings at both ends, a fixing part is provided at one end of the main body, and a wiring part is provided at the other end of the main body, the wiring part includes an inlet and an outlet, a limiting hole is provided on the outside of the inlet, an annular boss is provided on the outside of the outlet, and a key groove is provided in an annular manner on the fixing part.

[0006] Preferably, the wire inlet and the wire outlet are arranged in parallel, the wire inlet is opened in the middle of the end of the main body, and the wire outlet is opened on a boss with two ends opened and one end communicating with the inner cavity of the main body.

[0007] Preferably, a circular hole and a square boss are respectively provided on two opposite side walls of the main body.

[0008] Further preferably, the square boss is hollow inside and communicates with the inner cavity of the main body.

[0009] Preferably, a snap-fitting portion is provided on the inner side wall of the main body.

[0010] Preferably, the cross-section of the main body is a regular octagon, and the portion of the fixing portion where the key slot is provided protrudes from the side wall of the main body.

[0011] Further preferably, four key grooves are arranged in an annular shape.

[0012] Preferably, the annular boss is provided with a plurality of threaded holes in an annular shape.

[0013] Preferably, three limiting holes are arranged at equal intervals and each limiting hole is at the same distance from the line inlet.

[0014] Preferably, an auxiliary hole is provided on the side wall of the main body in a direction parallel to the axis of the main body.

[0015] A five-axis linkage machine tool CNC machining method for the above-mentioned junction box housing comprises the following steps:

[0016] A five-axis linkage machine tool CNC machining method for the above-mentioned junction box housing comprises the following steps:

[0017] S1: Clamp one end of the blank with a fixture, and use a flat cutter to mill out the contours of the fixing part and the main body, with an allowance of 0.5mm;

[0018] S2: Use a flat cutter to mill out the four keyways on the fixed part, with a margin of 0.5mm;

[0019] S3: Turn around and clamp the other end, and use a flat-bottomed cutter to mill the contour of the connection part and the annular boss;

[0020] S4: Replace the flat bottom cutter to mill the inlet and outlet;

[0021] S5: Use a flat cutter to mill auxiliary holes with a margin of 0.5mm;

[0022] S6: Mill the side surface, use a flat cutter to mill the boss and square boss, with an allowance of 0.5mm;

[0023] S7: milling the slot in the square boss with a flat-bottom cutter;

[0024] S8: through slot on milling boss;

[0025] S9: Change the flat bottom cutter to mill the round hole;

[0026] S10: Finishing, set the allowance to 0 and repeat the milling according to S1 to S9;

[0027] S11: Drill the threaded hole on the annular boss, use a center drill to center it, then use a drill to drill a through hole, and then use a tap to tap to complete the threaded hole;

[0028] S12: Drill the limit hole, use the center drill to center, then use the drill to drill the through hole, and then use the tap to complete the thread processing.

[0029] The present invention adopts two levels of rough machining and fine machining. In the process of cutting, the advantage of five-axis linkage is utilized to effectively use milling and drilling to process parts according to the tool path requirements of the parts. During processing, it only needs to be disassembled, turned around and clamped once, which effectively avoids the errors generated by traditional processing methods, solves the problems of improper processing surface selection, confusing steps, complicated processing procedures, and multiple disassembly and assembly affecting the accuracy encountered in the processing and production of shell parts, and improves the dimensional accuracy of shell parts. The method of the present invention can process such shell parts in a simpler and more standardized manner. During the CNC machining process, the cutting load is balanced, the tool wear is reduced, the error is reduced, and the outer surface process is beautiful.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] 1. The present invention arranges the wire inlet and the wire outlet on the same side and the matching design of the limiting hole, the annular boss and the fixing part, so that the wire inlet and the wire connection are on the same side and the limiting component is used for radial limiting, thereby improving the fixing ability of the wires and occupying a small volume. The fixing part at the other end can set the housing on the support or connect the sealing cover, thereby improving the stability of the housing;

[0032] 2. The present invention can limit the electric wires in the housing in the axial and radial directions through the matching design of the circular hole and the square boss, thereby improving the stability of the connection of the electric wires in the housing;

[0033] 3. The present invention reduces the volume of the housing to the maximum extent and reduces the weight of the housing by designing the shape of the main body and opening the outlet on the boss;

[0034] 4. The present invention can assist in fixing or connecting the housing through the provision of the auxiliary hole, thereby improving the applicability of the housing;

[0035] 5. The method of the present invention has the advantages of being simple and easy to implement, and having stable processing quality, and can simplify the cumbersome programming problems in the processing process;

[0036] 6. The method of the present invention is applicable to most shell parts, which can effectively reduce labor costs and improve process requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 The structure of the junction box housing of the present invention is shown in FIG. Figure 1 ;

[0038] Figure 2 The structure of the junction box housing of the present invention is shown in FIG. Figure 2 ;

[0039] In the figure: 1-main body, 2-fixing part, 21-keyway, 3-wiring part, 31-inlet, 32-outlet, 33-limiting hole, 34-annular boss, 341-threaded hole, 4-boss, 5-round hole, 6-square boss, 7-auxiliary hole. DETAILED DESCRIPTION

[0040] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The following embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes, but the protection scope of the present invention is not limited to the following embodiments.

[0041] Example 1

[0042] A junction box housing, such as Figures 1-2 As shown, it includes a main body 1, a fixing portion 2, a wiring portion 3, a boss 4, a round hole 5, a square boss 6 and an auxiliary hole 7.

[0043] The main body 1 is a hollow prism with a regular octagonal cross-section, with two openings at both ends. A fixing part 2 is provided at one end, and a wiring part 3 is provided at the other end. The wiring part 3 includes an inlet 31 and an outlet 32 ​​arranged in parallel with each other. Three limiting holes 33 are provided beside the inlet 31, which are used to connect the limiting device to limit the inlet. The outlet 32 ​​is arranged in an annular boss 34, which can limit the outlet, and a plurality of threaded holes 341 are arranged in an annular manner on the annular boss 34, which can be used to connect external devices. The boss 4 is open at both ends, hollow inside and communicated with the inner cavity of the main body 1. An outlet 32 ​​is provided above it, which is communicated with the inner cavity of the boss 4. A fixing part 2 is provided at the other end of the main body 1, and four key slots 21 are arranged in an annular shape on the fixing part 2, which can be used to connect the sealing cover or fix the position. A circular hole 5 and a square boss 6 are respectively provided on the two opposite side walls of the main body 1, and a through groove is provided on the square boss 6. The main body 1 is further provided with an auxiliary hole 7 on the same side as the square boss 6 to assist in fixing or connecting the shell.

[0044] A five-axis linkage machine tool CNC machining method for the above-mentioned junction box housing comprises the following steps:

[0045] S1: Clamp one end of the blank with a fixture, and use a Φ30mm flat-bottomed cutter to mill out the contours of the fixing part 2 and the main body 1, with a margin of 0.5mm;

[0046] S2: Use a Φ10mm flat bottom cutter to mill out four Φ7.525mm, 25.4mm long keyways 21 on the fixing part 2, with a margin of 0.5mm;

[0047] S3: Turn around and clamp the other end. First, use a Φ50mm flat-bottomed cutter to mill the plane so that the part height meets the requirement. Then use a Φ30mm flat-bottomed cutter to mill out the outline of the connection part 3, leaving a cylindrical allowance.

[0048] S4: Use a Φ30mm flat-bottom cutter to mill a Φ290mm cylinder with a margin of 0.5mm, and then use a T-type cutter with a diameter of 75mm and a blade length of 13mm to mill a small cylinder of Φ236.06mm below the cylinder with a margin of 0.5mm to obtain an annular boss 34;

[0049] S5: Replace the Φ30mm flat bottom cutter to mill the Φ209mm inlet 31 and the Φ200mm outlet 32 ​​at the center of the cylinder;

[0050] S6: Use a Φ10mm flat bottom cutter to mill an auxiliary hole 7 of Φ25.72mm and a depth of 86.5, with a margin of 0.5mm;

[0051] S7: Mill the side surface, use a Φ30mm flat-bottom cutter to mill the boss 4 and the square boss 6, with a margin of 0.5mm;

[0052] S8: Use a Φ5mm flat-bottom cutter to mill the groove in the square boss 6;

[0053] S9: Use a Φ30mm flat bottom cutter to mill a Φ57.12mm, 256.29mm long through groove on the boss 4, and then use a Φ12mm ball cutter to mill a Φ226.466mm, 120.06mm long arc groove;

[0054] S10: Replace the Φ15mm flat bottom knife with a Φ52mm round hole 5;

[0055] S11: Finishing, set the allowance to 0 and repeat the milling according to S1 to S10;

[0056] S12: Drill 12 M8 threaded holes 341 on the annular boss 34, use a Φ8mm center drill for centering, use a Φ7mm drill to drill through holes, and then use an M8 tap to tap to complete the threaded holes;

[0057] S13: Drill three M16 limit holes 33, use a Φ16mm center drill for centering, use a Φ15mm drill to drill through holes, and then use an M16 tap to complete the thread processing.

[0058] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A junction box housing, characterized in that: The invention comprises a main body (1) with openings at both ends, a fixing portion (2) being provided at one end of the main body (1), and a wiring portion (3) being provided at the other end of the main body (1), the wiring portion (3) comprising an inlet (31) and an outlet (32), a limiting hole (33) being provided on the outside of the inlet (31), and an annular boss (34) being provided on the outside of the outlet (32), and a key groove (21) being provided in an annular manner on the fixing portion (2); The wire inlet (31) and the wire outlet (32) are arranged in parallel, the wire inlet (31) is opened in the middle of the end of the main body (1), and the wire outlet (32) is opened on a boss (4) with two ends open and one end communicating with the inner cavity of the main body (1); A snap-fitting portion is provided on the inner side wall of the main body (1); The cross-sectional shape of the main body (1) is a regular octagon, and the portion of the fixing portion (2) provided with the key slot (21) protrudes from the side wall of the main body (1).

2. The junction box housing according to claim 1, characterized in that: A circular hole (5) and a square boss (6) are respectively provided on two opposite side walls of the main body (1).

3. The junction box housing according to claim 2, characterized in that: The square boss (6) is hollow inside and communicates with the inner cavity of the main body (1).

4. The junction box housing according to claim 1, characterized in that: There are four key grooves (21) arranged in an annular shape.

5. The junction box housing according to claim 1, characterized in that: The annular boss (34) is provided with a plurality of threaded holes (341) in an annular shape.

6. The junction box housing according to claim 1, characterized in that: The limiting holes (33) are arranged in three equal intervals and each limiting hole is at the same distance from the line inlet (31); An auxiliary hole (7) is provided on the side wall of the main body (1) in a direction parallel to the axis of the main body (1).

7. A junction box housing according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: Clamp one end of the blank with a fixture and use a flat cutter to mill out the contours of the fixing part (2) and the main body (1), with an allowance of 0.5 mm; S2: Use a flat cutter to mill out the keyway (21) on the fixing part (2) with a margin of 0.5 mm; S3: Turn around and clamp the other end, and use a flat-bottomed cutter to mill the contour of the connection part (3) and the annular boss (34); S4: Replace the flat bottom cutter to mill the line inlet (31) and the line outlet (32); S5: Use a flat cutter to mill the auxiliary hole (7) with a margin of 0.5 mm; S6: Mill the side surface, use a flat cutter to mill the boss (4) and the square boss (6), with a margin of 0.5 mm; S7: milling the groove in the square boss (6) with a flat bottom cutter; S8: a through groove on the milling boss (4); S9: Replace the flat bottom cutter to mill the circular hole (5); S10: Finishing, set the allowance to 0 and repeat the milling according to S1 to S9; S11: Drill the threaded hole (341) on the annular boss (34), use a center drill to center it, then use a drill to drill a through hole, and then use a tap to tap to complete the threaded hole; S12: Drill the limit hole (33), use a center drill to center it, then use a drill to drill a through hole, and then use a tap to tap to complete the thread processing.

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