A method and tooling for unifying turning and milling processing datums

Abstract

The present invention proposes a method and tooling for unifying turning and milling processing datums. The tooling includes a positioning flange and a fixed base. The positioning flange cooperates with the lathe spindle flange or the boss of the fixed base through the tapered groove at the large end; the large end of the positioning flange is connected to the lathe spindle flange or the fixed base through a plurality of semicircular built-in bolts with arc-shaped notches, and a stop bolt is installed next to each built-in bolt. The rotation angle of the semicircular locking bolts also having arc-shaped notches arranged inside the lathe spindle flange or the fixed base can be adjusted so that the locking bolts and the built-in bolts are locked at 90°; the small end of the positioning flange cooperates with the middle hole of the workpiece and is connected by a hexagonal bolt. When using this tooling for turning and milling processing, the fixture and the workpiece are designed to be integrated, the processing datum is transferred from the workpiece to the fixture, the processing datum of the turning and milling processes is unified, and rapid alignment and rapid clamping are achieved, which effectively improves processing efficiency, shortens auxiliary working hours, and ensures processing accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical manufacturing, and in particular relates to a method and a tool for unifying turning and milling processing datums. Background Art

[0002] As a precision component in the transmission system of special vehicles, the frame requires extremely high machining accuracy, and the machining process is divided into rough machining, semi-finishing, and finishing. In the finishing process, one of the steps is the fine boring process completed on the milling machine, which requires the outer cylindrical machining surface of the previous turning process as the machining reference, and the shape and position accuracy is extremely high. Usually, after turning, the workers remove the workpiece from the lathe and install it on the milling machine table. The clamping process is very cumbersome, and it takes a lot of time to re-calibrate the tool. The cumulative error caused by secondary clamping and alignment will have a great impact on the product processing accuracy. In order to improve the product processing accuracy and processing efficiency and shorten the machine tool auxiliary time, it is urgent to design a method and tooling that can unify the turning and milling processing reference to achieve rapid positioning and production change. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The present invention proposes a method and tooling for unifying turning and milling processing datums to solve the technical problem that high-precision products need to be re-clamped and re-tooled due to process flow, resulting in low processing efficiency and processing accuracy.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the present invention proposes a tooling for unified turning and milling processing datum, the tooling comprising a positioning flange and a fixed base; wherein,

[0007] The large end of the positioning flange is provided with a conical groove, which cooperates with the lathe spindle flange or the boss of the fixed base through the conical groove; the large end of the positioning flange is connected to the lathe spindle flange or the fixed base through a plurality of semicircular built-in bolts with arc-shaped notches, and a stop bolt is installed next to each built-in bolt. By adjusting the rotation angle of the semicircular locking bolts also having arc-shaped notches arranged inside the lathe spindle flange or the fixed base, the locking bolts and the built-in bolts can be locked at 90°; the small end of the positioning flange cooperates with the middle hole of the workpiece and is connected by a hexagonal bolt;

[0008] The fixed base is installed on the milling machine workbench. Its structure is the same as that of the lathe spindle flange. A conical boss is provided on the top for matching with the conical groove of the positioning flange. A locking bolt with an arc-shaped notch is also provided inside, which is used to engage and lock with the built-in bolt of the positioning flange at 90° to lock the positioning flange.

[0009] In addition, the present invention also proposes a method for unifying the turning and milling processing benchmark. When the above-mentioned tooling is used for turning processing, the built-in bolt is first installed in the threaded hole of the large end of the positioning flange, the anti-rotation bolt is installed, and then the positioning flange is installed on the spindle flange of the lathe, the locking bolt inside the lathe flange is rotated to lock with the built-in bolt, and then the workpiece is installed on the small end of the positioning flange, and the outer circle and inner hole of the workpiece are finely turned;

[0010] After the turning process is completed, the locating flange is removed from the lathe together with the workpiece, and the next step of fine boring process is carried out. The locating flange and the workpiece are not separated during the flow process; during the fine boring process, the fixed base is first installed on the milling machine workbench, and the conical boss of the fixed base is aligned and positioned by the tool, and then the locating flange and the workpiece are installed above the fixed base together, the locking bolt inside the fixed base is turned, and locked with the built-in bolt of the locating flange, and the milling process begins.

[0011] (III) Beneficial effects

[0012] The present invention proposes a method and tooling for unifying turning and milling processing datums. The tooling includes a positioning flange and a fixed base. The positioning flange cooperates with the lathe spindle flange or the boss of the fixed base through the tapered groove at the large end; the large end of the positioning flange is connected to the lathe spindle flange or the fixed base through a plurality of semicircular built-in bolts with arc-shaped notches, and a stop bolt is installed next to each built-in bolt. The rotation angle of the semicircular locking bolts also having arc-shaped notches arranged inside the lathe spindle flange or the fixed base can be adjusted so that the locking bolts and the built-in bolts are locked at 90°; the small end of the positioning flange cooperates with the middle hole of the workpiece and is connected by a hexagonal bolt. When using this tooling for turning and milling processing, the fixture and the workpiece are designed to be integrated, the processing datum is transferred from the workpiece to the fixture, the processing datum of the turning and milling processes is unified, and rapid alignment and rapid clamping are achieved, which effectively improves processing efficiency, shortens auxiliary working hours, and ensures processing accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the positioning flange structure in the embodiment of the present invention: (a) a view from the large end, (b) a view from the small end;

[0014] Figure 2 Schematic diagram of the relationship between the locking bolt and the built-in bolt in the embodiment of the present invention;

[0015] Figure 3 Schematic diagram of the tooling in use (milling processing) in an embodiment of the present invention: (a) a three-dimensional view, (b) a top view, and (c) an AA cross-sectional view of the top view;

[0016] Figure 4 Schematic diagram of the fixed base structure in an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples.

[0018] This embodiment provides a tooling for unified turning and milling processing datum, which is mainly composed of a positioning flange 1 and a fixed base 4 .

[0019] The structure of the positioning flange 1 is as follows Figure 1 As shown. The large end of the positioning flange 1 is provided with a conical groove, which can be matched with the lathe spindle flange or the boss of the fixed base 4 through the conical groove. The dimensional accuracy of the conical groove can ensure high-precision matching with the lathe spindle flange. The conical surface of the groove of the positioning flange 1 is a common reference surface for turning and milling. The conical surface design of the groove can automatically guide and align, and the positioning accuracy is higher.

[0020] The large end of the positioning flange 1 is connected to the lathe spindle flange or fixed base 4 through six semicircular built-in bolts 2 with arc-shaped notches, and a stop bolt 3 is installed next to each built-in bolt 2. By adjusting the rotation angle of the semicircular locking bolt 5 with an arc-shaped notch set inside the lathe spindle flange or fixed base 2, the locking bolt 5 and the built-in bolt 2 can be locked at 90 degrees. Figure 2 As shown, this connection method can achieve quick replacement. The small end of the positioning flange 1 is matched with the middle hole of the workpiece 6 with high precision and connected by a hexagonal bolt 7, as shown in FIG. Figure 3 shown.

[0021] The fixed base 4 is mounted on the milling machine workbench, such as Figure 3 As shown, the structure is the same as that of the spindle flange of the lathe, and a conical boss is arranged on the top for cooperating with the conical groove of the positioning flange 1, and a locking bolt 5 with an arc-shaped notch is also arranged inside, which is used to engage and lock with the built-in bolt 2 of the positioning flange 1 at 90 degrees, thereby locking the positioning flange 1.

[0022] When using this tooling for turning processing, first install the built-in bolt 2 into the threaded hole at the large end of the positioning flange 1, install the anti-rotation bolt 3, and then install the positioning flange 1 on the lathe spindle flange, turn the locking bolt 5 inside the lathe flange to lock it with the built-in bolt 2, and then install the workpiece 6 to the small end of the positioning flange 1, and start fine turning the outer circle and inner hole of the workpiece.

[0023] After the turning process is completed, the positioning flange 1 and the workpiece 6 are removed from the lathe together, and the next step of fine boring process is carried out. The positioning flange 1 and the workpiece 6 are not separated during the circulation process. During the fine boring process, the fixed base 4 is first installed on the milling machine table, and the conical boss of the fixed base 4 is aligned and positioned by a tool, and then the positioning flange 1 and the workpiece 6 are installed on the fixed base 4 together, and the locking bolts 5 inside the fixed base 4 are turned to lock with the built-in bolts 2 of the positioning flange 1, and the milling process begins.

[0024] The above method can keep the lathe processing benchmark consistent with the milling machine processing benchmark, avoiding the problem of increasing the shape and position error due to the change of benchmark. The tool can effectively unify the lathe and milling processing benchmarks, ensure the shape and position accuracy of the workpiece, and improve the processing efficiency. The fixed base 4 is used as the zero point positioning system of the milling machine. When fine boring, the tool only needs to align the fixed base 4 boss once, and there is no need to align the workpiece again. During batch processing, it can greatly improve the processing efficiency and save tool setting time. Using two semicircular studs 90° cross-locking can achieve quick disassembly and installation, shortening the clamping time.

[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for unifying turning and milling processing benchmarks, characterized in that: The tooling used in the method includes a positioning flange and a fixed base; wherein, the large end of the positioning flange is provided with a conical groove, which cooperates with the lathe spindle flange or the boss of the fixed base through the conical groove; the large end of the positioning flange is connected to the lathe spindle flange or the fixed base through a plurality of semicircular built-in bolts with arc-shaped notches, and a stop bolt is installed next to each built-in bolt. The rotation angle of the semicircular locking bolt which also has an arc-shaped notch and is arranged inside the lathe spindle flange or the fixed base can be adjusted so that the locking bolt and the built-in bolt are locked at 90°; the small end of the positioning flange cooperates with the middle hole of the workpiece and is connected by a hexagonal bolt; the fixed base is installed on the workbench of the milling machine, and its structure is the same as that of the lathe spindle flange. A conical boss for cooperating with the conical groove of the positioning flange is provided on the top, and a locking bolt with an arc-shaped notch is also provided inside for locking at 90° with the built-in bolt of the positioning flange to lock the positioning flange; When using the above-mentioned tooling for turning, first install the built-in bolt into the threaded hole at the large end of the positioning flange, install the anti-rotation bolt, then install the positioning flange onto the lathe spindle flange, turn the locking bolt inside the lathe flange and lock it with the built-in bolt, then install the workpiece onto the small end of the positioning flange, and start fine turning the outer circle and inner hole of the workpiece; After the turning process is completed, the locating flange is removed from the lathe together with the workpiece, and the next step of fine boring process is carried out. The locating flange and the workpiece are not separated during the flow process; during the fine boring process, the fixed base is first installed on the milling machine workbench, and the conical boss of the fixed base is aligned and positioned by the tool, and then the locating flange and the workpiece are installed above the fixed base together, the locking bolt inside the fixed base is turned, and locked with the built-in bolt of the locating flange, and the milling process begins.

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