Positioning and clamping mechanism for aluminum alloy die casting machining

Abstract

The utility model relates to the technical field of aluminum alloy die casting machining, in particular to a positioning and clamping mechanism for aluminum alloy die casting machining, which comprises a first support plate, a second support plate and a clamping component, the second support plate is mounted on the side surface of the first support plate, and a table top is mounted on the upper surface of the first support plate and the upper surface of the second support plate. The clamping assembly is arranged on the upper surface of the table board; and the clamping assembly comprises an assisting unit, the assisting unit comprises a first driving frame, a mounting cavity is formed in the surface of the table top, the first driving frame is slidably connected with the inner wall of the mounting cavity, and the inner wall, located in the mounting cavity, of the table top is slidably connected with a second driving frame shaft. According to the clamping mechanism, the clamping assembly is arranged, so that the clamping mechanism does not need to be driven by energy in the clamping state while the clamping stability is ensured, the problem that the use cost of the clamping mechanism is increased due to the fact that the energy needs to be used for keeping the state when the clamping mechanism is in the clamping state is solved, and the environmental protection property of the clamping mechanism is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aluminum alloy die-casting part processing, in particular to a positioning and clamping mechanism for aluminum alloy die-casting part processing. Background Art

[0002] The processing of aluminum alloy die-casting parts is an important industrial manufacturing process. First, molten aluminum alloy is injected into a mold through a die-casting process to quickly form die-casting parts with specific shapes and sizes. During the processing, a variety of advanced processing equipment and technologies are required, such as cutting processing, grinding processing, polishing treatment, etc., to remove defects such as burrs and flash on the surface of the die-casting parts, and improve their surface quality and dimensional accuracy. Aluminum alloy die-casting parts have the advantages of light weight, high strength, corrosion resistance, etc., and are widely used in many fields such as automobiles, aerospace, and electronics.

[0003] The prior art such as the utility model with the publication number of CN213530513U discloses a clamping mechanism for the shaping processing of aluminum alloy die-casting parts. The patent adopts a table, a cylinder, a runner, a stretching wire and a motor. First chutes are respectively arranged on the left and right sides in the middle of the table, and first clamping blocks penetrate through the first chutes. The bottom of the first clamping block is connected to one end of a rotating rod through a rotating shaft. A motor is fixedly connected to the center position at the top of the table. Second chutes are respectively arranged on the upper and lower sides in the middle of the table, and second clamping blocks penetrate through the second chutes. The upper part of the second chute is connected to one end of a threaded rod through a rotating shaft. Anti-slip rubbers are laid on the surfaces of the first clamping block and the second clamping block facing each other. The clamping mechanism for the shaping processing of aluminum alloy die-casting parts clamps the four front, back, left and right faces of the aluminum alloy die-casting part simultaneously, and will not cause position deviation during the shaping processing, and will not cause secondary damage and wear to the aluminum alloy die-casting part, solving the problems of the existing clamping mechanism for the shaping processing of aluminum alloy die-casting parts, which usually only uses a lead screw nut for clamping. The lead screw nut operation is time-consuming, affects the work efficiency, and provides a small clamping force, resulting in poor clamping effect, inconvenient for fixing and limiting, or poor clamping effect, resulting in unnecessary error wear during the processing and shaping.

[0004] During the process of clamping an aluminum alloy workpiece with the aid of a positioning and clamping mechanism, there is an existing aluminum alloy casting clamping mechanism as described above. During clamping, the cylinder drives a linkage structure and cooperates with the clamping block to achieve the clamping effect on the workpiece. When the clamping mechanism is in use, the cylinder needs to be in a working state all the time. Since the cylinder needs to continuously consume energy in the working state, the power consumption of the clamping mechanism increases, and the use cost of the mechanism is increased. Summary of the Utility Model

[0005] The purpose of the present utility model is to solve the disadvantages existing in the prior art that when the clamping mechanism is in use, the air cylinder needs to be in a working state all the time. Since the air cylinder needs to continuously consume energy in the working state, the power consumption of the clamping mechanism increases, and the use cost of the mechanism is improved. A positioning and clamping mechanism for processing aluminum alloy die-castings is proposed.

[0006] To achieve the above purpose, the present utility model adopts the following technical scheme: A positioning and clamping mechanism for processing aluminum alloy die-castings, including a first support plate, a second support plate and a clamping assembly. The second support plate is installed on the side surface of the first support plate. A tabletop is installed on the upper surfaces of the first support plate and the second support plate. The clamping assembly is arranged on the upper surface of the tabletop;

[0007] The clamping assembly includes an assisting unit. The assisting unit includes a first driving frame. An installation cavity is formed on the surface of the tabletop. The first driving frame is slidably connected to the inner wall of the installation cavity. A second driving frame is slidably connected to the inner wall of the installation cavity of the tabletop. Positioning shafts are fixedly connected to the surfaces of the first driving frame and the second driving frame. Connecting arms are rotatably connected to the surfaces of the positioning shafts. Rubber clamping blocks are fixedly connected to the surfaces of the connecting arms. A guiding frame is fixedly connected to the upper surface of the tabletop. A support is slidably connected to the inner wall of the guiding frame. The connecting arm is rotatably connected to the inner wall of the support. A limiting post is fixedly connected to the inner wall of the guiding frame. The limiting post is slidably connected to the inner wall of the support. Guiding columns are fixedly connected to both sides of the support. The guiding columns are slidably connected to the inner wall of the guiding frame;

[0008] The clamping assembly further includes a driving unit. The driving unit includes a first bidirectional lead screw. A circular hole is formed on the surface of the first support plate. The first bidirectional lead screw is rotatably connected to the inner wall of the circular hole. The first driving frame is threadedly connected to the surface of the first bidirectional lead screw. A servo motor is fixedly connected to the side surface of the first support plate. The first bidirectional lead screw is bolted to the driving end of the servo motor. A turbine is fixedly connected to the surface of the first bidirectional lead screw. A rotating hole is formed on the surface of the second support plate. A second bidirectional lead screw is rotatably connected to the inner wall of the rotating hole of the second support plate. The second driving frame is threadedly connected to the surface of the second bidirectional lead screw. A worm is fixedly connected to the surface of the second bidirectional lead screw. The worm is engaged with the tooth groove of the turbine.

[0009] Preferably, the number of the first driving frames is two. The two first driving frames are symmetrically arranged about the tabletop from left to right. Through the cooperation of the first driving frame and the first bidirectional lead screw, the connecting arms on both lateral sides can be driven to move, so as to clamp the workpiece transversely.

[0010] Preferably, the number of the second driving frames is two. The two second driving frames are symmetrically arranged about the tabletop from front to back. Through the cooperation of the second driving frame and the second bidirectional lead screw, the connecting arms on both longitudinal sides can be driven to move, so as to clamp the workpiece longitudinally.

[0011] Preferably, the connecting arm is in contact with the inner wall of the installation cavity. One end of the connecting arm close to the positioning shaft is arc-shaped. The position of the connecting arm can be restricted by the positioning shaft to ensure that one end of the connecting arm is always connected to the first driving frame and the second driving frame.

[0012] Preferably, the clamping groove of the rubber clamping block is V-shaped. The rubber clamping block can be used to contact the workpiece instead of the connecting arm to reduce the damage to the workpiece when the clamping mechanism clamps the workpiece.

[0013] Preferably, the number of the guiding frames is two. The two guiding frames are symmetrically arranged about the connecting arm. The number of the brackets matches that of the guiding frames. The moving direction of the connecting arm can be guided by the cooperation of the guiding frames and the brackets.

[0014] Preferably, the number of the limiting columns is two. The two limiting columns are mirror-symmetrically arranged about the axis of the guiding frame. The moving distance of the bracket can be restricted by the cooperation of the limiting columns and the guiding columns.

[0015] Preferably, the length of the first bidirectional lead screw is equal to the length of the tabletop, and the length of the second bidirectional lead screw is equal to the width of the tabletop. The second bidirectional lead screw is located below the first bidirectional lead screw. The first bidirectional lead screw can be driven by a servo motor to cooperate with the worm and the turbine to drive the second bidirectional lead screw to rotate.

[0016] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0017] In the present utility model, when the clamping mechanism is used to clamp and position the workpiece by setting the clamping assembly, the workpiece is placed in the clamping area above the table. The switch of the servo motor is turned on, and the servo motor is energized to drive the first bidirectional lead screw. The first bidirectional lead screw rotates the turbine, and the turbine meshes with the worm and drives the second bidirectional lead screw. When the first bidirectional lead screw and the second bidirectional lead screw rotate synchronously, the first bidirectional lead screw and the second bidirectional lead screw respectively mesh with the first driving frame and the second driving frame. Under the action of the positioning shaft, the first driving frame and the second driving frame push the connecting arm. During the movement of the connecting arm, the connecting arm pushes the support upward. The support moves under the guidance of the limiting column and the guiding column. At the same time, the connecting arm rotates under the guidance of the support and pushes the rubber clamping block towards the workpiece. During the movement of the rubber clamping block, it abuts against the surface of the workpiece and changes according to the shape of the workpiece surface, so that it can stably fit on the workpiece surface to cooperate with the connecting arm to clamp the workpiece. When the tool is clamped, the servo motor is turned off, and at the same time, the first bidirectional lead screw and the second bidirectional lead screw stop rotating, and the positions of the first driving frame and the second driving frame are locked. Therefore, the clamping mechanism does not require energy during the clamping state. By setting the clamping assembly, the clamping mechanism ensures stable clamping and does not require energy drive during the clamping state, thereby reducing the problem that the use cost of the clamping mechanism increases due to the need to use energy to maintain the state during the clamping state, and further improving the environmental protection of the clamping structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. is a schematic three-dimensional structure diagram of a positioning and clamping mechanism for processing aluminum alloy die-castings proposed by the present utility model;

[0019] Figure 2 FIG. is a schematic bottom view structure diagram of a positioning and clamping mechanism for processing aluminum alloy die-castings proposed by the present utility model;

[0020] Figure 3 FIG. is a schematic structure diagram of a clamping assembly of a positioning and clamping mechanism for processing aluminum alloy die-castings proposed by the present utility model;

[0021] Figure 4 FIG. is a positioning and clamping mechanism for processing aluminum alloy die-castings proposed by the present utility model Figure 3 FIG. of the structure at A in;

[0022] Figure 5 FIG. is a positioning and clamping mechanism for processing aluminum alloy die-castings proposed by the present utility model Figure 3 FIG. of the structure at B in.

[0023] LEGEND DESCRIPTION:

[0024] 1. First support plate; 2. Second support plate; 3. Tabletop; 4. Clamping assembly; 41. Assistance unit; 411. Installation cavity; 412. First driving frame; 413. Second driving frame; 414. Positioning shaft; 415. Connecting arm; 416. Rubber clamping block; 417. Guide frame; 418. Bracket; 419. Limit post; 4110. Guide post; 42. Driving unit; 421. First bidirectional lead screw; 422. Servo motor; 423. Turbine; 424. Second bidirectional lead screw; 425. Worm Detailed implementation method

[0025] Please refer to Figures 1 - 5 , the present utility model provides a technical solution: a positioning and clamping mechanism for processing aluminum alloy die-castings, including a first support plate 1, a second support plate 2 and a clamping assembly 4. The second support plate 2 is installed on the side surface of the first support plate 1, the upper surfaces of the first support plate 1 and the second support plate 2 are provided with a tabletop 3, and the clamping assembly 4 is arranged on the upper surface of the tabletop 3.

[0026] In this implementation: The clamping assembly 4 includes an assistance unit 41. The assistance unit 41 includes a first driving frame 412. An installation cavity 411 is provided on the surface of the tabletop 3. The first driving frame 412 is slidably connected to the inner wall of the installation cavity 411. A second driving frame 413 is slidably connected to the inner wall of the installation cavity 411 on the tabletop 3. Positioning shafts 414 are fixedly connected to the surfaces of the first driving frame 412 and the second driving frame 413. A connecting arm 415 is rotatably connected to the surface of the positioning shaft 414. A rubber clamping block 416 is fixedly connected to the surface of the connecting arm 415. A guide frame 417 is fixedly connected to the upper surface of the tabletop 3. A bracket 418 is slidably connected to the inner wall of the guide frame 417. The connecting arm 415 is rotatably connected to the inner wall of the bracket 418. A limit post 419 is fixedly connected to the inner wall of the guide frame 417. The limit post 419 is slidably connected to the inner wall of the bracket 418. Guide posts 4110 are fixedly connected to both sides of the bracket 418. The guide posts 4110 are slidably connected to the inner wall of the guide frame 417;

[0027] The clamping assembly 4 further includes a driving unit 42. The driving unit 42 includes a first bidirectional lead screw 421. A circular hole is provided on the surface of the first support plate 1. The first bidirectional lead screw 421 is rotatably connected to the inner wall of the circular hole. The first driving frame 412 is threadedly connected to the surface of the first bidirectional lead screw 421. A servo motor 422 is fixedly connected to the side surface of the first support plate 1. The first bidirectional lead screw 421 is bolted to the driving end of the servo motor 422. A turbine 423 is fixedly connected to the surface of the first bidirectional lead screw 421. A rotating hole is provided on the surface of the second support plate 2. A second bidirectional lead screw 424 is rotatably connected to the inner wall of the rotating hole on the second support plate 2. The second driving frame 413 is threadedly connected to the surface of the second bidirectional lead screw 424. A worm 425 is fixedly connected to the surface of the second bidirectional lead screw 424. The worm 425 is engaged with the tooth groove of the turbine 423.

[0028] Specifically, the number of the first driving frames 412 is two, and the two first driving frames 412 are symmetrically arranged left and right with respect to the tabletop 3. Through the cooperation of the first driving frames 412 and the first bidirectional lead screw 421, the connecting arms 415 on both lateral sides can be driven to move, so as to clamp the workpiece laterally.

[0029] Specifically, the number of the second driving frames 413 is two, and the two second driving frames 413 are symmetrically arranged front and back with respect to the tabletop 3.

[0030] In this embodiment: Through the cooperation of the second driving frames 413 and the second bidirectional lead screw 424, the connecting arms 415 on both longitudinal sides can be driven to move, so as to clamp the workpiece longitudinally.

[0031] Specifically, the connecting arm 415 is in contact with the inner wall of the installation cavity 411. One end of the connecting arm 415 close to the positioning shaft 414 is arc-shaped. The position of the connecting arm 415 can be restricted by the positioning shaft 414 to ensure that one end of the connecting arm 415 is always connected to the first driving frame 412 and the second driving frame 413.

[0032] In this embodiment: The clamping notch of the rubber clamping block 416 is V-shaped.

[0033] In this embodiment: The rubber clamping block 416 can be used to contact the workpiece instead of the connecting arm 415, so as to reduce the damage to the workpiece when the clamping mechanism clamps the workpiece.

[0034] Specifically, the number of the guiding frames 417 is two, and the two guiding frames 417 are symmetrically arranged left and right with respect to the connecting arm 415. The number of the brackets 418 matches that of the guiding frames 417. Through the cooperation of the guiding frames 417 and the brackets 418, the moving direction of the connecting arm 415 can be guided.

[0035] Specifically, the number of the limiting columns 419 is two, and the two limiting columns 419 are arranged in mirror image with respect to the axis of the guiding frame 417.

[0036] In this embodiment: Through the cooperation of the limiting columns 419 and the guiding columns 4110, the moving distance between the brackets 418 can be restricted.

[0037] Specifically, the length of the first bidirectional lead screw 421 is equal to the length of the tabletop 3, and the length of the second bidirectional lead screw 424 is equal to the width of the tabletop 3. The second bidirectional lead screw 424 is located below the first bidirectional lead screw 421. Through the first bidirectional lead screw 421, under the drive of the servo motor 422, it can cooperate with the worm 425 and the turbine 423 to drive the second bidirectional lead screw 424 to rotate.

[0038] Working principle: When using the clamping mechanism to clamp and position the workpiece, place the workpiece in the clamping area above the table. Turn on the switch of the servo motor 422. The servo motor 422 is energized to drive the first bidirectional lead screw 421. The first bidirectional lead screw 421 rotates the turbine 423. The turbine 423 meshes with the worm 425 and drives the second bidirectional lead screw 424. When the first bidirectional lead screw 421 and the second bidirectional lead screw 424 rotate synchronously, the first bidirectional lead screw 421 and the second bidirectional lead screw 424 respectively mesh with the first drive frame 412 and the second drive frame 413. Under the action of the positioning shaft 414, the first drive frame 412 and the second drive frame 413 push the connecting arm 415. During the movement of the connecting arm 415, it pushes the bracket 418 upward. The bracket 418 moves under the guidance of the limit post 419 and the guiding post 4110. At the same time, the connecting arm 415 rotates under the guidance of the bracket 418 and pushes the rubber clamping block 416 towards the workpiece. During the movement of the rubber clamping block 416, it abuts against the surface of the workpiece and changes according to the shape of the workpiece surface, so that it can stably fit on the workpiece surface to cooperate with the connecting arm 415 to clamp the workpiece. When the tool is clamped, turn off the servo motor 422. At the same time, the first bidirectional lead screw 421 and the second bidirectional lead screw 424 stop rotating, and the positions of the first drive frame 412 and the second drive frame 413 are locked. As a result, the clamping mechanism does not require energy when in the clamping state. By setting the clamping assembly 4, the clamping mechanism ensures stable clamping and does not require energy drive when in the clamping state. Subsequently, it reduces the problem that the use cost of the clamping mechanism increases due to the need to use energy to maintain the state when the clamping mechanism is in the clamping state, and further improves the environmental protection of the clamping structure.

Claims

1. A positioning and clamping mechanism for processing aluminum alloy die-castings, comprising a first support plate (1), a second support plate (2) and a clamping assembly (4), characterized in that: The second support plate (2) is installed on the side surface of the first support plate (1). The upper surfaces of the first support plate (1) and the second support plate (2) are installed with a tabletop (3). The clamping assembly (4) is arranged on the upper surface of the tabletop (3). The clamping assembly (4) includes an assisting unit (41). The assisting unit (41) includes a first driving frame (412). An installation cavity (411) is formed on the surface of the tabletop (3). The first driving frame (412) is slidably connected to the inner wall of the installation cavity (411). A second driving frame (413) is slidably connected to the inner wall of the tabletop (3) where the installation cavity (411) is located. Positioning shafts (414) are fixedly connected to the surfaces of the first driving frame (412) and the second driving frame (413). A connecting arm (415) is rotatably connected to the surface of the positioning shaft (414). A rubber clamping block (416) is fixedly connected to the surface of the connecting arm (415). A guiding frame (417) is fixedly connected to the upper surface of the tabletop (3). A support (418) is slidably connected to the inner wall of the guiding frame (417). The connecting arm (415) is rotatably connected to the inner wall of the support (418). A limiting column (419) is fixedly connected to the inner wall of the guiding frame (417). The limiting column (419) is slidably connected to the inner wall of the support (418). Guiding columns (4110) are fixedly connected to both sides of the support (418). The guiding columns (4110) are slidably connected to the inner wall of the guiding frame (417). The clamping assembly (4) further includes a driving unit (42). The driving unit (42) includes a first bidirectional lead screw (421). A circular hole is formed on the surface of the first support plate (1). The first bidirectional lead screw (421) is rotatably connected to the inner wall of the circular hole. The first driving frame (412) is threadedly connected to the surface of the first bidirectional lead screw (421). A servo motor (422) is fixedly connected to the side surface of the first support plate (1). The first bidirectional lead screw (421) is bolted to the driving end of the servo motor (422). A turbine (423) is fixedly connected to the surface of the first bidirectional lead screw (421). A rotating hole is formed on the surface of the second support plate (2). A second bidirectional lead screw (424) is rotatably connected to the inner wall of the second support plate (2) where the rotating hole is located. The second driving frame (413) is threadedly connected to the surface of the second bidirectional lead screw (424). A worm (425) is fixedly connected to the surface of the second bidirectional lead screw (424). The worm (425) is engaged with the tooth groove of the turbine (423).

2. The positioning and clamping mechanism for processing aluminum alloy die-castings according to claim 1, wherein: The number of the first driving frames (412) is two, and the two first driving frames (412) are symmetrically arranged about the tabletop (3) in the left-right direction.

3. The positioning and clamping mechanism for processing aluminum alloy die-castings according to claim 1, characterized in that: The number of the second driving frames (413) is two, and the two second driving frames (413) are symmetrically arranged about the tabletop (3) in the front-back direction.

4. The positioning and clamping mechanism for processing aluminum alloy die-castings according to claim 1, wherein: The connecting arm (415) is in contact with the inner wall of the installation cavity (411), and one end of the connecting arm (415) close to the positioning shaft (414) is arc-shaped.

5. The positioning and clamping mechanism for processing aluminum alloy die-castings according to claim 1, characterized in that: The clamping notch of the rubber clamping block (416) is V-shaped.

6. The positioning and clamping mechanism for processing aluminum alloy die-castings according to claim 1, characterized in that: The number of the guiding frames (417) is two, and the two guiding frames (417) are symmetrically arranged left and right with respect to the connecting arm (415). The number of the brackets (418) matches that of the guiding frames (417).

7. A positioning and clamping mechanism for processing aluminum alloy die-castings according to claim 1, characterized in that: The number of the limiting columns (419) is two, and the two limiting columns (419) are arranged in a mirror image with respect to the axis of the guiding frame (417).

8. The positioning and clamping mechanism for processing aluminum alloy die-castings according to claim 1, wherein: The length of the first bidirectional lead screw (421) is equal to the length of the tabletop (3), and the length of the second bidirectional lead screw (424) is equal to the width of the tabletop (3). The second bidirectional lead screw (424) is located below the first bidirectional lead screw (421).

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