Workbench positioning and locking mechanism

Abstract

The utility model discloses a workbench positioning and locking mechanism which is applied to an exchange workbench of a turning plate machining center, a wedge-shaped guide rail is installed on the upper portion of a working trolley, electric permanent magnetic chucks are symmetrically installed in the middle of the working trolley, a V-shaped eccentric wheel is installed on the lower portion of the working trolley, the workbench is installed on the working trolley in a buckled mode, and a displacement sensor is installed between the workbench and the working trolley. The utility model relates to the technical field of turning plate machining center exchange workbenches, the wedge-shaped guide rail is adopted for positioning, the positioning of an inclined plane and a vertical plane is completed by using gravity, and then the electric permanent magnetic chuck is used for locking, so that the work efficiency is improved, and the work efficiency is improved. The positioning process is stable and reliable, the workbench is free of displacement in the locking process, the locking process is stable, and the positioning precision and the repeated precision are high.

Description

Technical Field

[0001] The utility model relates to the technical field of exchange workbenches of a flap machining center, in particular to a workbench positioning and locking mechanism. Background Art

[0002] With the rapid development of my country's aviation manufacturing industry, the demand for flap machining centers is also increasing; the worktable of the flap machining center is arranged vertically, and the vertical worktable has excellent chip removal performance. Its machining accuracy, finish, dynamic performance, and machining efficiency are far superior to those of the horizontally arranged worktable; however, the vertical worktable cannot use gravity to stick to the horizontal positioning surface to achieve positioning like the horizontal worktable, and its locking process requires horizontal displacement, the locking process is not stable, and high positioning accuracy cannot be maintained. Positioning and locking accuracy is one of the most important precisions for the exchange worktable. At present, most of the exchange worktables of flap machining centers at home and abroad use horizontal plane positioning and hydraulic locking, which have the problems of low positioning accuracy, poor repeatability, slow locking speed, and poor reliability. In view of this, in-depth research on the above-mentioned problems has led to the creation of this case. Utility Model Content

[0003] The utility model aims at solving the above problems and provides a workbench positioning and locking mechanism with compact structure, high precision, high efficiency and good stability, which is suitable for the positioning and locking mechanism of the exchange workbench of the flap machining center in the vertical arrangement state.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: the workbench positioning and locking mechanism is mainly used for the exchange workbench of the flap machining center, adopts wedge-shaped guide rails for positioning, and uses gravity to complete the positioning of the inclined surface and the vertical surface. A wedge-shaped guide rail is installed on the upper part of the work trolley, an electric permanent magnetic suction cup is symmetrically installed in the middle part, and a V-shaped eccentric wheel is installed at the lower part. The workbench is buckled on the work trolley, and a displacement sensor is arranged between the work trolley and the workbench. A hydraulic locking piece is installed at one end of the work trolley, and the hydraulic locking piece is engaged with the wedge-shaped clamping block at one end of the workbench.

[0005] The workbench is provided with rollers and wedge-shaped hooks on the upper part and circular guide rails on the lower part. The rollers and wedge-shaped hooks cooperate with the wedge-shaped guide rails, and the circular guide rails cooperate with the V-shaped eccentric wheels.

[0006] The above-mentioned hydraulic locking member includes a locking seat installed at one end of the working trolley, on which a hydraulic cylinder is installed for pushing the wedge-shaped pressure plate, a positioning block is arranged on one side of the locking seat, and a longitudinal displacement sensor is installed at one end of the positioning block for realizing the longitudinal positioning of the workbench.

[0007] When the workbench is exchanged: the workbench moves longitudinally on the V-shaped eccentric wheel through the circular guide rail, and the upper roller of the workbench contacts and guides the vertical surface of the wedge-shaped guide rail; when it moves close to the position, the hydraulic cylinder on the work trolley pulls the wedge-shaped pressure plate to press the wedge-shaped pressure block, and drags the workbench longitudinally into position to achieve the longitudinal positioning of the workbench; after the longitudinal displacement sensor detects that the workbench is in place, the hydraulic cylinder is released, and the V-shaped eccentric wheel is lowered and separated from the workbench; the workbench descends a small distance under the action of gravity, and the wedge-shaped hook contacts the inclined surface of the wedge-shaped guide rail, and then moves downward along the inclined surface to make the side of the workbench contact with the electric permanent magnetic suction cup, so as to achieve the positioning of the inclined surface and vertical surface of the workbench; after the displacement sensor detects that the workbench is in contact with the electric permanent magnetic suction cup, the hydraulic cylinder and the electric permanent magnetic suction cup are started to lock the workbench.

[0008] The utility model provides a workbench positioning and locking mechanism, which has the following beneficial effects:

[0009] 1. The wedge-shaped guide rail is used for positioning, and gravity is used to complete the positioning of the inclined surface and the vertical surface. Then the electric permanent magnetic chuck is used for locking, so that the positioning process is smooth and reliable. In addition, there is no displacement of the workbench during the locking process, the locking process is smooth, and the positioning accuracy and repeatability are high.

[0010] 2. It adopts electric permanent magnetic chuck for locking, which has strong locking force, stable and reliable. The electric permanent magnetic chuck is energized only at the moment of magnetization and demagnetization, and does not consume electricity, generate heat, or deform due to heat at other times, and does not affect the accuracy of the workbench.

[0011] 3. It is easy to use, low cost and high efficiency. Compared with the existing actuators, it effectively solves the problems of slow workbench exchange speed, low positioning accuracy and poor repeatability accuracy. At the same time, the utility model has a simple structure and has obvious advantages in cost performance compared with the existing actuators. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the main structure of a workbench positioning and locking mechanism described in the utility model.

[0013] Figure 2 For this utility model Figure 1 Schematic diagram of the cross-sectional structure of the BB position.

[0014] Figure 3 For this utility model Figure 1 Schematic diagram of the partial cross-sectional structure of the CC position.

[0015] In the figure: 1 is a working trolley, 2 is a wedge-shaped guide rail, 3 is a V-shaped eccentric wheel, 4 is an electric permanent magnetic suction cup, 5 is a displacement sensor, 6 is a locking seat, 7 is a hydraulic cylinder, 8 is a wedge-shaped pressure plate, 9 is a positioning block, 10 is a longitudinal displacement sensor, 11 is a workbench, 12 is a roller, 13 is a wedge-shaped hook, 14 is a circular guide rail, and 15 is a wedge-shaped clamping block. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] Embodiment: In conjunction with the specification Figure 1-3 It can be seen that this solution is mainly used for the exchange workbench of the flap machining center, adopts a wedge-shaped guide rail 2 for positioning, and uses gravity to complete the positioning of the inclined surface and the vertical surface. It specifically includes a working trolley 1, a wedge-shaped guide rail 2, a V-shaped eccentric wheel 3, an electric permanent magnetic suction cup 4, a displacement sensor 5, a locking seat 6, a hydraulic cylinder 7, a wedge-shaped pressure plate 8, a positioning block 9, a longitudinal displacement sensor 10, a workbench 11, a roller 12, a wedge-shaped hook 13, a round guide rail 14, and a wedge-shaped clamping block 15; the above-mentioned working trolley 1 can be understood as a flap The slide of the machining center machine tool, the wedge-shaped guide rail 2 is installed on the upper part of the working trolley 1, the V-shaped eccentric wheel 3 is installed on the lower part, and the electric permanent magnetic suction cup 4 is installed in the middle of the working trolley 1; a displacement sensor 5 is installed between the working trolley 1 and the workbench 11, and a locking seat 6, a hydraulic cylinder 7, a wedge-shaped pressure plate 8, a positioning block 9 and a longitudinal displacement sensor 10 are installed at one end of the working trolley 1; a roller 12 and a wedge-shaped hook 13 are installed on the upper part of the workbench 11, and a circular guide rail 14 is installed on the lower part; a wedge-shaped clamping block 15 is installed at one end of the workbench 11.

[0018] When the workbench is exchanged during the specific implementation process: Figure 1-2 , as shown, the workbench 11 moves longitudinally through the circular guide rail 14 under the driving action of the V-shaped eccentric wheel 3, and the roller 12 on the upper part of the workbench 11 is in contact with the vertical surface of the wedge-shaped guide rail 2; Figure 3 When the workbench 11 moves close to the position, the hydraulic cylinder 7 on the work trolley 1 pulls the wedge-shaped pressure plate 8 to press the wedge-shaped pressing block 15, and drags the workbench 11 longitudinally into position to achieve the longitudinal positioning of the workbench 11; when the longitudinal displacement sensor 10 detects that the workbench 11 is in place, the hydraulic cylinder 7 is released, and the V-shaped eccentric wheel 3 is lowered and separated from the workbench 11; at this time, the workbench 11 drops a slight distance under the action of gravity, and the wedge-shaped hook 13 contacts the inclined surface of the wedge-shaped guide rail 2, and then moves downward along the inclined surface to make the side of the workbench 11 contact with the electric permanent magnetic suction cup 4, so as to achieve the positioning of the inclined surface and the vertical surface of the workbench 11; when the displacement sensor 5 detects that the workbench 11 is in contact with the electric permanent magnetic suction cup 4, the hydraulic cylinder 7 and the electric permanent magnetic suction cup 4 are started to lock the workbench 11, and the workbench exchange and locking positioning work is completed.

[0019] The workbench positioning and locking mechanism adopts a wedge-shaped guide rail for positioning, utilizes gravity to complete the positioning of the inclined surface and the vertical surface, and then utilizes an electro-permanent magnetic suction cup for locking, so that the positioning process is smooth and reliable, and the workbench does not displace during the locking process, the locking process is smooth, and the positioning accuracy and repeatability accuracy are high; in addition, the electro-permanent magnetic suction cup is locked, the locking force is large, and it is stable and reliable; the electro-permanent magnetic suction cup is energized only at the moment of magnetization and demagnetization, and does not consume electricity, generate heat, or have thermal deformation at other times, and does not affect the accuracy of the workbench; the device is easy to use, low in cost, and high in efficiency, and compared with the existing actuators, it effectively solves the problems of slow workbench exchange speed, low positioning accuracy, and poor repeatability accuracy; at the same time, the utility model has a simple structure and has obvious advantages in cost performance compared with the existing actuators.

[0020] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A workbench positioning and locking mechanism, used for the exchange workbench of a flap machining center, characterized in that: The working trolley (1) is provided with a wedge-shaped guide rail (2) on the upper part, an electric permanent magnetic suction cup (4) is symmetrically provided in the middle part, and a V-shaped eccentric wheel (3) is provided at the lower part. The working table (11) is buckled on the working trolley (1). A displacement sensor (5) is provided between the working trolley (1) and the working table (11). A hydraulic locking member is provided at one end of the working trolley (1), and the hydraulic locking member is engaged with a wedge-shaped pressing block (15) at one end of the working table (11).

2. A workbench positioning and locking mechanism according to claim 1, characterized in that: The workbench (11) is provided with a roller (12) and a wedge-shaped hook (13) on the upper portion, and a circular guide rail (14) on the lower portion. The roller (12) and the wedge-shaped hook (13) cooperate with the wedge-shaped guide rail (2), and the circular guide rail (14) cooperates with the V-shaped eccentric wheel (3).

3. A workbench positioning and locking mechanism according to claim 1, characterized in that: The hydraulic locking member comprises a locking seat (6) mounted at one end of the work trolley (1), a hydraulic cylinder (7) mounted on the locking seat (6) for pushing the wedge-shaped pressure plate (8), a positioning block (9) arranged on one side of the locking seat (6), and a longitudinal displacement sensor (10) mounted at one end of the positioning block (9) for achieving longitudinal positioning of the workbench (11).

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