Four-axis machining clamp for middle connecting plate

Abstract

The utility model discloses a four-axis machining fixture for a middle connecting plate, which is characterized by comprising two fixture bases which are oppositely arranged, a first rotary table and a second rotary table are respectively arranged on the two fixture bases, and rotary shafts of the first rotary table and the second rotary table are connected with a fixture bottom plate. A plurality of clamping stations are arranged on the clamp bottom plate in the length direction, hollowed-out holes corresponding to the clamping stations are formed in the clamp bottom plate, each clamping station comprises a set of cylindrical positioning pins, three supporting columns and three pressing devices, the cylindrical positioning pins are symmetrically distributed along the center of the hollowed-out holes, and the supporting columns are arranged on the supporting columns. The three pressing devices are correspondingly arranged above the three supporting columns respectively. The multi-station clamp has the advantages that three procedures are combined into one procedure, and the multi-station clamp is designed, so that the design and manufacturing process of the clamp and the product precision requirement are guaranteed, the product rhythm is accelerated, and the design and manufacturing cost of the clamp is greatly reduced.

Description

A four-axis machining fixture for a connecting plate Technical Field

[0001] This utility model relates to the field of machining fixtures, specifically to a four-axis machining fixture for a connecting plate. Background Technology

[0002] The development and production of the new product, the connecting plate assembly, involves machining four sides. According to conventional design, four sets of machining fixtures need to be designed. This not only results in high fixture design and manufacturing costs but also requires multiple machines. Furthermore, due to the high coaxiality requirements of the bearing holes on the front and back sides of the product, multiple clamping errors during the product's multi-process machining will lead to poor product accuracy consistency, making it impossible to guarantee the relative positional accuracy of each machined part. This cannot meet the cost and development schedule requirements for the product development and production. Summary of the Invention

[0003] To address the shortcomings of the existing technology, this utility model provides a four-axis machining fixture for a connecting plate, which combines the three processes of machining the front and back bearing holes and the holes on the sides of the product into one process. This not only ensures the design and manufacturing process of the fixture and the product accuracy requirements, but also speeds up the product cycle.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A four-axis machining fixture for a connecting plate is characterized by comprising two fixture bases arranged opposite to each other, a first rotary table and a second rotary table respectively provided on the two fixture bases, a fixture base plate connected to the rotary shaft of the first rotary table and the second rotary table, a plurality of clamping stations arranged along the length direction on the fixture base plate, and a hollow hole corresponding to each clamping station on the fixture base plate, each clamping station comprising a set of cylindrical positioning pins, three support columns, and three clamping devices, wherein the cylindrical positioning pins are symmetrically distributed along the center of the hollow hole, the three support columns are triangularly distributed along the outer side of the hollow hole, and the three clamping devices are respectively disposed above the three support columns.

[0006] Furthermore, the first rotary table is driven by a servo motor to achieve precise rotation control of the fixture base plate. An oil distribution bushing is connected to the first rotary table, and the oil distribution bushing is connected to the oil circuit inside the fixture base plate. An anti-rotation limit block is provided on the fixture base to limit the rotation of the oil distribution bushing.

[0007] Furthermore, a floating support cylinder is provided between any two of the support columns.

[0008] Furthermore, the clamping device is a lever clamping cylinder or a rotary clamping cylinder, both of which are connected to the oil circuit in the fixture base plate.

[0009] Furthermore, each clamping station is equipped with two pre-positioning posts.

[0010] The beneficial effects of this utility model include: combining the three processes of machining the front and back bearing holes and the holes on the sides of the product into one process, and designing and manufacturing the machining fixture as a set of fixtures as a dual-station fixture. This not only ensures the design and manufacturing process of the fixture and the product accuracy requirements, but also speeds up the product cycle and significantly reduces the design and manufacturing cost of the fixture, thus better meeting the user's development and production needs for this new product. Attached Figure Description

[0011] Figure 1 is a structural schematic diagram of this utility model. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0013] A four-axis machining fixture for a connecting plate, as shown in Figure 1, includes two oppositely arranged fixture bases 1 for mounting on a machine tool base. A first rotary table 2 and a second rotary table 3 are respectively mounted on the two fixture bases 1, and fixture base plates 4 are connected to the rotation axes of the first rotary table 2 and the second rotary table 3. The fixture base plates 4 have two clamping stations along their length, and each clamping station has a corresponding perforated hole 5, which allows the workpiece to be machined in four directions after clamping. Each clamping station on the front of the fixture base plate 4 includes a set of cylindrical positioning pins 6, three support columns 7, and three clamping devices 8. The cylindrical positioning pins 6 are symmetrically distributed along the center of the hollow hole 5 and are used to position the middle connecting plate. The three support columns 7 are distributed in a triangle along the outside of the hollow hole 5 and are used to support and position the end face of the middle connecting plate, and the support stability is high, thus completing the two-pin positioning of one side of the middle connecting plate. The three clamping devices 8 are respectively set above the three support columns 7 and are used to clamp the other end face of the middle connecting plate.

[0014] To achieve four-sided automatic indexing machining, the first rotary table 2 in this embodiment is driven by a servo motor, while the second rotary table 3 is not powered but rotates along with the first rotary table 2. This is used to achieve precise flipping control of the fixture base plate 4 and avoid positioning errors caused by repeated clamping of the workpiece. An oil distribution sleeve 9 is connected to the first rotary table 2, and the oil distribution sleeve 9 is connected to the oil circuit inside the fixture base plate 4. The clamping device 8 is a lever clamping cylinder or a rotary clamping cylinder, both of which are connected to the oil circuit inside the fixture base plate 4. An anti-rotation limit block 10 is provided on the fixture base 1 to limit the rotation of the oil distribution sleeve 9.

[0015] To prevent product deformation during the processing of the connecting plate edge, a floating support cylinder 11 is provided on the fixture base plate 4 of this embodiment between any two support columns 7.

[0016] To facilitate quick clamping and alignment of the workpiece to be processed, each clamping station in this embodiment is provided with two pre-positioning posts 12.

[0017] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used in this document to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only intended to help understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A fixture for machining a web with four shafts, characterized in that: The fixture includes two oppositely arranged fixture bases (1), on which a first rotary table (2) and a second rotary table (3) are respectively provided. A fixture base plate (4) is connected to the rotation axis of the first rotary table (2) and the second rotary table (3). Multiple clamping stations are provided on the fixture base plate (4) along the length direction. The fixture base plate (4) has a hollow hole (5) corresponding to each clamping station. Each clamping station includes a set of cylindrical positioning pins (6), three support columns (7), and three clamping devices (8). The cylindrical positioning pins (6) are symmetrically distributed along the center of the hollow hole (5), the three support columns (7) are triangularly distributed along the outside of the hollow hole (5), and the three clamping devices (8) are respectively arranged above the three support columns (7).

2. The four-axis machining fixture for a connecting plate according to claim 1, characterized in that: The first rotary table (2) is driven by a servo motor to achieve precise rotation control of the fixture base plate (4). An oil distribution bushing (9) is connected to the first rotary table (2). The oil distribution bushing (9) is connected to the oil circuit inside the fixture base plate (4). An anti-rotation limit block (10) is provided on the fixture base (1) to limit the rotation of the oil distribution bushing (9).

3. The four-axis machining fixture for a connecting plate according to claim 1, characterized in that: A floating support cylinder (11) is provided between any two of the support columns (7).

4. A four-axis machining fixture for a connecting plate according to claim 2, characterized in that: The clamping device (8) is a lever clamping cylinder or a rotary clamping cylinder, and the lever clamping cylinder or the rotary clamping cylinder is connected to the oil circuit in the fixture base plate (4).

5. A four-axis machining fixture for a connecting plate according to claim 1, characterized in that: Two pre-positioning posts (12) are provided at each clamping station.

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