CN218927026U - A Fixture for Improving Machining Accuracy of Dovetail Groove - Google Patents

Abstract

The utility model discloses a fixture for improving the machining accuracy of a dovetail groove, which comprises a workpiece fixing frame; a workpiece fixing screw, and several workpiece fixing screws are evenly distributed on the left end surface and the right end surface of the workpiece fixing frame through threads; Angle rotation rod, two angle rotation rods are respectively fixed on the front end surface and rear end surface of the workpiece fixing frame; angle plate, the angle plate is fixed on the angle rotation rod through bearings; fixture base, the The angle rotation rod is fixed on the clamp base through a vertical plate, and the vertical plate is connected to the angle rotation rod through a bearing, and the angle rotation rod fixing device is provided on the clamp base; the workpiece fixing frame passes through the The angle swivel rod fixing device realizes the angle fixing. The device of the present application is provided with an angle plate to make the rotation angle of the fixed frame of the workpiece precise, so that the machining angle between the milling cutter for machining the dovetail groove and the workpiece is precise, thereby improving the machining accuracy of the dovetail groove.

Description

A Fixture for Improving Machining Accuracy of Dovetail Groove

technical field

The utility model relates to the technical field of fixtures for machining dovetail grooves of workpieces, in particular to a fixture for improving the machining accuracy of dovetail grooves.

Background technique

The dovetail groove is a mechanical structure, the shape of the groove is ∠, and its function is usually for mechanical relative movement. It has the characteristics of high motion precision and stability. Dovetail grooves are often used in conjunction with trapezoidal guide rails for guiding and supporting functions, and are often used in scenarios such as machine tool carriages. The unique structure of the dovetail groove makes it can only be processed with a special form milling cutter, namely the dovetail groove milling cutter. Dovetail grooves with different angles need to be processed with milling cutters with different angles, and if the workpiece needs to be processed with symmetrical dovetail grooves on both sides, it is necessary to do one clamping and mill out the dovetail grooves at both ends successively. However, due to the characteristics of the dovetail groove, it can only be cut in one pass and formed in one pass. If the levelness of both ends cannot meet the requirements due to uneven clamping or other conditions cause the workpiece to fail to meet the standard, it cannot be repaired like other ordinary milling processes. Workpieces can only be voided. Therefore, the above-mentioned characteristics of dovetail groove processing make the clamping of workpieces for processing dovetail grooves very important. Especially when processing the inclination angle of the dovetail groove, if there is an angle deviation, it will affect the processing quality of the dovetail groove.

Contents of the invention

In view of the above defects or deficiencies in the prior art, it is desired to provide a jig that improves the machining accuracy of dovetail grooves.

According to the technical solution provided by the embodiment of the present application, a fixture for improving the machining accuracy of dovetail grooves, the left end surface and the right end surface of the workpiece fixing frame of the rectangular frame are threaded to connect several workpiece fixing screws, and the workpiece fixing screws pass through the workpiece fixing frame , a horizontally placed angle rotation rod is fixed on the front and rear ends of the workpiece fixing frame, and an angle plate is fixed on the angle rotation rod through a bearing, and the bearing connected with the angle plate passes through a vertically placed vertical plate The fixture base is fixedly connected, and an angle rotating rod fixing device is provided on the fixture base. The angle rotating rod fixing device can fix the rotation of the angle rotating rod, that is, the workpiece fixing frame realizes angle fixing through the angle rotating rod fixing device.

Further, a pointer is provided on the angle rotating rod.

Further, the rotating motor on the angle rotating rod fixing device is fixedly connected to the horizontal screw through the motor shaft, and the two ends of the horizontal screw are fixedly connected to the screw fixing base through bearings, and left helical and right helical patterns are arranged at both ends of the horizontal screw. The two arc-shaped fixing clips on both sides of the angle rotation rod are connected to the horizontal screw through the connecting plate, and the two connecting plates are respectively connected to the left helix and the right helix through threads, and the angle rotation rod fixing device is fixed to the base of the fixture through the screw fixing base .

Further, an anti-slip protrusion is provided on the inner surface of the arc-shaped fixing clip.

Further, scales are arranged on the angle plate.

Further, the fixture base is provided with installation through holes.

In summary, the beneficial effects of the application: the device of the application has the following advantages:

1. Several workpiece fixing screws are provided on both sides of the workpiece fixing frame of the device of this application, which can fix workpieces of different shapes to process dovetail grooves;

2. The device of this application is equipped with an angle plate, which can make the rotation angle of the fixed frame of the workpiece precise, so that the processing angle between the milling cutter for dovetail groove processing and the workpiece can be precise, and then the processing accuracy of the dovetail groove can be improved.

Description of drawings

Other characteristics, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

Fig. 1 is the structural representation of the overall device of the present utility model;

Fig. 2 is a structural schematic diagram of the angle rotation rod fixing device of the present invention.

Symbols in the figure: workpiece fixing frame-1; workpiece fixing screw rod-2; angle rotating rod-3; angle plate-4; fixture base-5; vertical plate-6; angle rotating rod fixing device-7; rotating motor-71 ; Horizontal screw-72; screw fixing base-73; arc-shaped clamp-74; pointer-8; connecting plate-9.

Detailed ways

The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain related inventions, rather than to limit the invention. It should also be noted that, for ease of description, only parts related to the invention are shown in the drawings.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

A fixture for improving the machining accuracy of dovetail grooves, as shown in Figure 1, a plurality of workpiece fixing screws 2 are arranged on the left and right end surfaces of a workpiece fixing frame 1 of a cuboid frame, and the workpiece fixing screws 2 pass through the workpiece through threads Fixed frame 1, two angle rotating rods 3 are horizontally fixed on the front end face and the rear end face of workpiece fixing frame 1, on the two angle rotating rods 3, the angle disc 4 is fixedly sleeved through bearings, and on the workpiece fixing frame 1 There is a fixture base 5 below, and the workpiece fixing frame 1 is fixedly connected to the fixture base 5 through the angle rotation rod 3, and the angle rotation rod 3 is connected to the fixture base 5 through the vertical plate 6 placed vertically, and the vertical plate 6 is connected to the angle plate 4 through the angle plate 4. The bearing between the rotating rods 3 is connected to the angle rotating rod 3, and a pointer 8 is fixed on the angle rotating rod 3, and the pointer 8 is located not far from the end face of the angle disc 4;

As shown in Figures 1 and 2, an angle rotation rod fixing device 7 is fixed on the clamp base 5, and two arc-shaped fixing clips 74 on the angle rotation rod fixing device 7 are respectively located on the left and right sides of the angle rotation rod 3. side, two arc-shaped fixing clips 74 are respectively set on the horizontal screw rod 72 through the connecting plate 9, and the two connecting plates 9 are respectively threaded with the left helical thread and the right helical thread on the horizontal screw rod 72, and the two ends of the horizontal screw rod 72 The motor shaft of the rotary motor 71 fixed on the fixture base 5 is fixedly connected with the horizontal screw 72 through the bearing connection screw fixing base 73 .

Before use, it is first fixed through the installation through hole on the fixture base 5, and then the workpiece to be processed is fixed in the workpiece fixing frame 1 through the workpiece fixing screw 2. Because there are several workpiece fixing screws 2, when fixing a special-shaped workpiece, Since the workpiece fixing screw rod 2 is point-fixed, so when several workpiece fixing screw rods 2 are provided, a special-shaped workpiece can be fixed.

Then manually rotate the workpiece fixing frame 1, so that after the pointer 8 points to the angle that needs to be milled on the workpiece, start the rotating motor 71 on the angle rotating rod fixing device 7, so that the horizontal screw 72 rotates, so that the two arc fixing clips 74 are facing the angle Rotating rod 3 moves, and then clamps angle rotating rod 3, prevents angle rotating rod 3 from rotating, because angle rotating rod 3 is fixedly connected with workpiece fixing frame 1, so simultaneously, the angle of workpiece fixing frame 1 is fixed, at this moment can use milling The knife processes the dovetail groove at a specific angle to the workpiece.

Since the horizontal screw 72 is provided with a left helical thread and a right helical thread, so when the horizontal screw rod 72 rotates in one direction, the two connecting plates 9 connected with the left helical thread and the right helical thread through threads will face different directions. move.

There are two types of threads: left-handed and right-handed. The thread that is screwed in when it is turned counterclockwise is called a left-handed thread.

The horizontal screw 72 is a screw, a cylinder with spiral grooves cut on the outer surface or a cone cut with spiral grooves on the conical surface. The screws have different heads, such as large flat screws, hexagon socket screws, and so on. The screw rod in this scheme is a cylinder with helical grooves cut on the outer surface.

The angle disc 4 mentioned in this solution is a circular disc with a scale on the end face.

The above description is only a description of the preferred embodiments of the present application and the technical principles used. At the same time, the scope of the invention involved in this application is not limited to the technical solution formed by the specific combination of the above-mentioned technical features, but also covers the technical solutions made by the above-mentioned technical features or their equivalent features without departing from the inventive concept. Other technical solutions formed by any combination. For example, a technical solution formed by replacing the above-mentioned features with technical features with similar functions disclosed in (but not limited to) this application.

Claims (6)

1. A fixture for improving the machining accuracy of dovetail grooves, characterized in that: comprising, Workpiece fixing frame (1); A workpiece fixing screw (2), a plurality of workpiece fixing screws (2) are evenly distributed on the left end surface and the right end surface of the workpiece fixing frame (1) through threads; Angle rotation rods (3), the two angle rotation rods (3) are respectively fixed on the front end surface and the rear end surface of the workpiece fixing frame (1); An angle plate (4), the angle plate (4) is fixed on the angle rotating rod (3) through a bearing; Clamp base (5), the angle rotation rod (3) is fixed on the clamp base (5) by a vertical plate (6), and the vertical plate (6) is connected to the angle rotation rod (3) by a bearing ), the fixture base (5) is provided with an angle rotation rod fixing device (7); The workpiece fixing frame (1) realizes angle fixing through the angle rotation rod fixing device (7). 2. A jig for improving machining accuracy of dovetail grooves according to claim 1, characterized in that: a pointer (8) is fixed on the angle rotation rod (3). 3. A fixture for improving machining accuracy of dovetail slots according to claim 1, characterized in that: said angle rotation rod fixing device (7) includes a rotating motor (71), a horizontal screw (72), a screw fixing base ( 73) and an arc-shaped clamp (74), the two ends of the horizontal screw (72) are fixedly connected to the screw fixing base (73) by bearings, and the horizontal screw (72) is provided with a left helical thread and a right helical The left helical pattern and the right helical pattern are respectively located at both ends of the horizontal screw (72), and the two arc-shaped fixing clips (74) located at both ends of the angle rotation rod (3) The two ends of the horizontal screw (72) are encased by connecting plates (9) respectively, and the two connecting plates (9) are respectively connected with the left helical thread and the right helical thread, and the rotating motor ( 71) the motor shaft is fixedly connected with the horizontal screw (72). 4. A jig for improving machining accuracy of dovetail grooves according to claim 3, characterized in that: said arc-shaped fixing clamp (74) is provided with anti-slip protrusions. 5. A jig for improving machining accuracy of dovetail grooves according to claim 1, characterized in that: the angle plate (4) is provided with a scale. 6. A jig for improving machining accuracy of dovetail grooves according to claim 1, characterized in that: said jig base (5) is provided with a through hole for installation.

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