A precision milling jig for precision hardware

Abstract

The utility model relates to the field of milling fixture, especially precise milling fixture of precision hardware spare, the upper portion of base is equipped with the supporting plate, is equipped with a plurality of limit slot no.

Description

Technical Field

[0001] This utility model relates to the field of milling fixture technology, and in particular to a precision milling fixture for precision hardware parts. Background Technology

[0002] Fixtures typically serve both positioning and guiding functions. For example, a drill jig is equipped with a precise drill bushing, which can directly guide the drill bit to perform machining in a preset position.

[0003] In the milling process of precision hardware parts, the fixture needs to meet the requirements of extremely high positioning and repeatability accuracy of the workpiece in order to ensure the stability of the milling process. In the existing production process, for each specific precision hardware part, a contour jig that closely matches its shape is usually specially designed and manufactured.

[0004] However, in practical applications, the development cycle of such precision milling fixtures for traditional precision hardware parts is long, the cost is high, and the flexibility is poor, which urgently needs to be addressed. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a precision milling fixture for precision hardware parts.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A precision milling fixture for precision hardware parts includes a base, on which a support plate is mounted. The support plate has multiple limiting grooves, and limiting rods are installed in the grooves. The bottom of the limiting rods is screwed to an adjusting screw. Each limiting rod is cylindrical and has a rectangular plane on one side. A rectangular block is pressed against the upper part of the limiting rod by a locking nut. The rectangular block is locked and engaged in the rectangular groove on the upper part of the limiting rod.

[0008] In addition, a preferred structure is that a pair of limiting plates are installed between the base and the support plate, and each limiting plate has multiple through slots that penetrate the plate body and are connected to the outside.

[0009] In addition, a preferred structure is that multiple limiting grooves are provided on both sides of the bottom of the base, and an adjusting screw is rotatably installed in the limiting groove. The adjusting screw has a threaded section in the middle and is screwed to a base plate. The base plate covers the upper wall of the limiting groove.

[0010] Furthermore, in a preferred configuration, one end of the adjusting screw is a smooth section and has an internal hexagonal hole.

[0011] Furthermore, in a preferred configuration, the bottom of the base plate is positioned within a limiting groove.

[0012] In addition, a preferred structure is that an installation column is fixedly installed on one side of the upper part of the base plate, a limit rod is rotatably installed on the upper part of the installation column, and the top of the installation column is threaded and screwed with a locking nut. A rectangular block is pressed between the locking nut and the limit rod, and the rectangular block is engaged in a rectangular groove opened on the top of the limit rod.

[0013] The beneficial effects of this utility model are as follows:

[0014] In this utility model, the base is provided with multiple individually adjustable limiting rods to limit the side of the workpiece. The limiting rods can be rotated to achieve surface-to-surface contact with the side wall of the workpiece by utilizing their flat contact surfaces. A stable positioning structure is formed through point and surface constraints, which ensures clamping rigidity and has good shape adaptability. The structure is simple and reliable, which significantly improves the positioning accuracy and clamping stability of the fixture for workpieces of different specifications. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the external structure of a precision milling fixture for precision hardware parts proposed in this utility model.

[0016] Figure 2 This is an exploded structural diagram of a precision milling fixture for precision hardware parts proposed in this utility model.

[0017] Figure 3 This is a schematic diagram of the adjusting screw structure proposed in this utility model;

[0018] Figure 4 This is a schematic diagram of the installation structure of the limiting rod proposed in this utility model;

[0019] Figure 5 This is an exploded view of the limiting rod connection structure proposed in this utility model;

[0020] Figure 6 This is a schematic diagram of the rectangular block installation structure proposed in this utility model.

[0021] In the diagram: 1. Base; 2. Chip removal groove; 3. Adjusting screw; 31. Limiting groove one; 4. Support plate; 41. Limiting groove two; 5. Limiting rod; 51. Locking nut; 52. Base plate; 53. Rectangular groove; 6. Limiting plate; 7. Mounting column; 8. Rectangular block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figure 1-6A precision milling fixture for precision hardware parts includes a base 1, a support plate 4 mounted on the upper part of the base 1, the support plate 4 having multiple limiting grooves 41 and limiting rods 5 installed in the grooves, the bottom of the limiting rods 5 being screwed to the adjusting screw 3, and each limiting rod 5 being cylindrical with one side being a rectangular plane, and a rectangular block 8 being pressed against the upper part of the limiting rod 5 by a locking nut 51, the rectangular block 8 being locked and engaged in the rectangular groove 53 opened on the upper part of the limiting rod 5.

[0024] Multiple chip removal grooves 2 are provided in the middle of the base 1.

[0025] A pair of limiting plates 6 are installed between the base 1 and the support plate 4. Each limiting plate 6 has multiple through slots that penetrate the plate and are connected to the outside.

[0026] Multiple limiting grooves 31 are provided on both sides of the bottom of the base 1. An adjusting screw 3 is rotatably installed in the limiting groove 31. The middle part of the adjusting screw 3 is provided with a threaded section and is screwed to a base plate 52. The base plate 52 covers the upper wall of the limiting groove 31.

[0027] One end of the adjusting screw 3 is a smooth section with an internal hexagonal hole, so that the adjusting screw 3 can be rotated by a wrench of the corresponding specification. This is a conventional technical means in the field. The specific specifications, opening process and technology of the internal hexagonal hole are common knowledge to those skilled in the art and will not be explained further.

[0028] The bottom limit of the base plate 52 is installed in the limit groove 31, and horizontal displacement is achieved through the limit groove 31.

[0029] A mounting post 7 is fixedly installed on one side of the upper part of the base plate 52. A limit rod 5 is rotatably installed on the upper part of the mounting post 7. The top of the mounting post 7 is threaded and screwed with a locking nut 51. A rectangular block 8 is pressed between the locking nut 51 and the limit rod 5. The rectangular block 8 is engaged in the rectangular groove 53 opened on the top of the limit rod 5.

[0030] In this embodiment, the workpiece is placed on the support plate 4, and the adjusting screws 3 on both sides are adjusted synchronously, which drives the corresponding base plate 52 to move. The base plate 52 moves synchronously with the limiting rods 5 until it contacts the outer wall of the workpiece, until all the limiting rods 5 press the outer wall of the workpiece to complete the fastening.

[0031] For the flat side surface of the workpiece, the locking nut 51 on the upper part of the limiting rod 5 is loosened, and the rectangular block 8 is pulled up and down to disengage it from the rectangular groove 53 at the top of the bottom limiting rod 5. Then, the limiting rod 5 is rotated so that its flat side surface faces the workpiece. Then, the rectangular block 8 is pressed back on, and the locking nut 51 is tightened simultaneously to complete the rotation locking operation of the limiting rod 5. The flat side surface of the limiting rod 5 fits and presses against the flat side surface of the workpiece, and the cylindrical structure of the limiting rod 5 provides point constraint for non-planar surfaces of the workpiece. In this way, multiple limiting rods 5 form a constraint structure that fits the shape of the workpiece. There is no need to change the fixture, and different workpieces can be constrained.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A precision milling fixture for precision hardware parts, comprising a base (1), characterized in that, The base (1) is equipped with a support plate (4) on its upper part. The support plate (4) has multiple limiting grooves (41) and a limiting rod (5) is installed in the groove. The bottom of the limiting rod (5) is screwed to the adjusting screw (3). Each limiting rod (5) is cylindrical and has a rectangular plane on one side. A rectangular block (8) is pressed on the upper part of the limiting rod (5) by a locking nut (51). The rectangular block (8) is locked and snapped into the rectangular groove (53) opened on the upper part of the limiting rod (5).

2. The precision milling fixture for precision hardware parts according to claim 1, characterized in that, A pair of limiting plates (6) are installed between the base (1) and the support plate (4). Each limiting plate (6) has multiple through slots that penetrate the plate body and are connected to the outside.

3. The precision milling fixture for precision hardware parts according to claim 1, characterized in that, The base (1) has multiple limiting grooves (31) on both sides of its bottom. An adjusting screw (3) is rotatably installed in the limiting groove (31). The adjusting screw (3) has a threaded section in the middle and is screwed with a base plate (52). The base plate (52) covers the upper wall of the limiting groove (31).

4. A precision milling fixture for precision hardware parts according to claim 3, characterized in that, One end of the adjusting screw (3) is a smooth section and has an internal hexagonal hole.

5. A precision milling fixture for precision hardware parts according to claim 3, characterized in that, The bottom plate (52) is installed in the limiting groove (31) at the bottom.

6. A precision milling fixture for precision hardware parts according to claim 3, characterized in that, A mounting column (7) is fixedly installed on one side of the upper part of the base plate (52). A limit rod (5) is rotatably installed on the upper part of the mounting column (7). The top of the mounting column (7) is threaded and screwed with a locking nut (51). A rectangular block (8) is pressed between the locking nut (51) and the limit rod (5). The rectangular block (8) is snapped into the rectangular groove (53) opened on the top of the limit rod (5).

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