High-precision positioning device for gantry machining center

Abstract

The utility model relates to the technical field of high-precision positioning devices, and discloses a high-precision positioning device for a gantry machining center. According to the high-precision positioning device for the gantry machining center, through the arrangement of a driving mechanism, a linkage clamping mechanism and a positioning block B, a workpiece is placed on the surfaces of a first connecting plate and a second connecting plate, then a servo motor in a motor box is started, the servo motor drives a positive and negative lead screw on one side to rotate, and the workpiece is positioned; two threaded cylinders on the surface of the positive and negative lead screw move relatively on the surface of the positive and negative lead screw, connecting rods rotationally connected to the two sides of the top can be driven in the moving process to pull positioning blocks A at the tail ends and move relatively under limiting of limiting plates, and the positioning blocks A and positioning blocks B can move relatively at the same time in cooperation with the positioning blocks B on the tops of the threaded cylinders; therefore, the stability of the workpiece in the machining process is improved, and the situation that the workpiece is deviated due to infirm fixing, and the machining accuracy of the workpiece is affected is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of high-precision positioning devices, in particular to a high-precision positioning device for a gantry machining center. Background Technique

[0002] A gantry machining center is an efficient and high-precision machining device, which is widely used in fields such as aerospace, automobile manufacturing, and mold machining. In order to meet the high requirements for machining accuracy in these fields, a gantry machining center is usually equipped with a high-precision positioning device. The high-precision positioning device usually adopts an advanced control system, a high-precision workbench and spindle system, and a multi-axis linkage function to achieve the machining of complex curved surfaces and improve the machining accuracy and surface quality of parts.

[0003] The existing high-precision positioning device for a gantry machining center only clamps and positions both sides of the workpiece. There is still a problem that the position of the workpiece shifts due to insecure fixation, which in turn affects the machining accuracy of the workpiece. Therefore, a high-precision positioning device for a gantry machining center is proposed.

[0004] At present, the high-precision positioning device for a gantry machining center has the following disadvantages in the market: 1. When in use, it is not easy to position multiple surfaces of the workpiece to improve the stability of the workpiece during machining and avoid the shift of the workpiece, which affects the machining accuracy; 2. When fixing the workpiece, it is not easy to clamp and position special-shaped workpieces, and the practical performance is low.

[0005] Therefore, it is very necessary to invent a high-precision positioning device for a gantry machining center to solve the above problems. Content of the Utility Model

[0006] (1) Technical Problems to be Solved

[0007] The technical problem solved by the utility model is to provide a high-precision positioning device for a gantry machining center with high practicality, which can be operated simply and has a relatively simple structure, and solves the problems of multi-faceted positioning of the workpiece and positioning of special-shaped workpieces mentioned in the above background technique.

[0008] (2) Technical Solution

[0009] To achieve the above object, the utility model is realized through the following technical solutions: A high-precision positioning device for a gantry machining center, including a first connecting plate, a connecting block is fixedly connected to the back of the first connecting plate, a second connecting plate is fixedly connected to the back of the connecting block, an extension block is fixedly connected to the bottom of the first connecting plate, a motor box is fixedly connected to one side of the extension block, a driving mechanism is fixedly connected inside the motor box, the driving mechanism includes a servo motor and a positive and negative lead screw, two threaded cylinders are threadedly connected to the surface of the positive and negative lead screw, a linkage clamping mechanism is fixedly connected to the top of the threaded cylinder, the linkage clamping mechanism includes a fixed block, a rotating shaft, a connecting rod and a positioning block A, a plurality of fixing columns are fixedly connected to the surface of the positioning block A, a positioning mechanism is fixedly connected inside the fixing column, the positioning mechanism includes a supporting spring and a telescopic column, a positioning block B is fixedly connected to the edge of one side of the top of the threaded cylinder, and limiting plates are fixedly connected to both sides of the surfaces of the first connecting plate and the second connecting plate.

[0010] As a further scheme of the utility model, the servo motor is fixedly connected inside the motor box, the output end of the servo motor is fixedly connected with a positive and negative lead screw, and the servo motor facilitates the rotation of the positive and negative lead screw.

[0011] As a further scheme of the utility model, the fixed block is fixedly connected to the top of the threaded cylinder, two rotating shafts are fixedly connected to the top of the fixed block, the connecting rod is rotatably connected to the surface of the rotating shaft, one end of the connecting rod is rotatably connected to the positioning block A, and the positioning block A is slidably connected to the surface of the limiting plate, and the positioning block A facilitates fixing the workpiece.

[0012] As a further scheme of the utility model, the supporting spring is fixedly connected inside the fixing column, one end of the supporting spring is fixedly connected with a telescopic column, and the telescopic column is slidably connected inside the fixing column, and the supporting spring facilitates providing a supporting force.

[0013] As a further scheme of the utility model, four supporting columns are fixedly connected to the bottom surfaces of the first connecting plate and the second connecting plate, and a bottom plate is fixedly connected to the bottom of the supporting column, and the supporting column facilitates supporting the first connecting plate and the second connecting plate.

[0014] As a further scheme of the utility model, chutes are opened on the surfaces of the first connecting plate and the second connecting plate, and the positioning block B is slidably connected inside the chute, and the chute facilitates positioning the positioning block B.

[0015] As a further scheme of the utility model, the end of the positive and negative lead screw is rotatably connected with a supporting block, and the supporting block is fixedly connected to the bottom surface of the second connecting plate, and the supporting block facilitates supporting the positive and negative lead screw.

[0016] (III) Beneficial effects

[0017] The utility model provides a high-precision positioning device for a gantry machining center, which has the following beneficial effects:

[0018] 1. For the high-precision positioning device for the gantry machining center, through the setting of the driving mechanism, the linkage clamping mechanism and the positioning block B, the workpiece is placed on the surfaces of the first connecting plate and the second connecting plate, and then the servo motor inside the motor box is started. The servo motor drives the lead screw on one side to rotate. The two thread cylinders on the surface of the lead screw move relatively on the surface of the lead screw. During the movement, the connecting rods rotatably connected to both sides at the top will pull the positioning block A at the end and move relatively under the limitation of the limiting plate. Cooperating with the positioning block B at the top of the thread cylinder, the positioning block A and the positioning block B can move relatively at the same time and move closer to the workpiece position in the middle, improving the stability of the workpiece during processing and preventing the workpiece from shifting due to insecure fixation, which affects the machining accuracy of the workpiece.

[0019] 2. For the high-precision positioning device for the gantry machining center, through the setting of the positioning mechanism and the fixing column, when clamping a special-shaped workpiece, a plurality of fixing columns are arranged on the surface of the positioning block A, and a supporting spring is also arranged inside the fixing column. The supporting spring deforms under force and provides a reverse force to support the telescopic column on one side to press against the surface of the workpiece. Due to the plasticity of the supporting spring, the telescopic column can closely fit the workpiece with uneven surface, thus achieving the effect of clamping the special-shaped workpiece and improving the practicability of the equipment. Description of the Drawings

[0020] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 is a schematic diagram of the driving mechanism of the utility model;

[0022] Figure 3 is a schematic diagram of the first connecting plate of the utility model;

[0023] Figure 4 is a schematic diagram of the positioning mechanism of the utility model.

[0024] In the figure: 1. First connecting plate; 2. Connecting block; 3. Second connecting plate; 4. Extension block; 5. Motor box; 6. Driving mechanism; 601. Servo motor; 602. Lead screw; 7. Thread cylinder; 8. Linkage clamping mechanism; 801. Fixed block; 802. Rotating shaft; 803. Connecting rod; 804. Positioning block A; 9. Positioning mechanism; 901. Supporting spring; 902. Telescopic column; 10. Positioning block B; 11. Limiting plate; 12. Fixed column; 13. Supporting column; 14. Bottom plate; 15. Supporting block. Detailed Embodiment

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] Please refer to Figures 1 to 4 , the present utility model provides a technical solution: a high-precision positioning device for a gantry machining center, including a first connecting plate 1. A connecting block 2 is fixedly connected to the back of the first connecting plate 1. A second connecting plate 3 is fixedly connected to the back of the connecting block 2. An extension block 4 is fixedly connected to the bottom of the first connecting plate 1. A motor box 5 is fixedly connected to one side of the extension block 4. A driving mechanism 6 is fixedly connected to the inside of the motor box 5. Through the settings of the driving mechanism 6, the linkage clamping mechanism 8, and the positioning block B 10, it is avoided that the workpiece is offset due to insecure fixation, affecting the machining accuracy of the workpiece. The driving mechanism 6 includes a servo motor 601 and a forward and reverse lead screw 602. Two threaded barrels 7 are threadedly connected to the surface of the forward and reverse lead screw 602. A linkage clamping mechanism 8 is fixedly connected to the top of the threaded barrel 7. The linkage clamping mechanism 8 includes a fixed block 801, a rotating shaft 802, a connecting rod 803, and a positioning block A 804. A plurality of fixing columns 12 are fixedly connected to the surface of the positioning block A 804. A positioning mechanism 9 is fixedly connected to the inside of the fixing column 12. Through the settings of the positioning mechanism 9 and the fixing columns 12, the effect of clamping the special-shaped workpiece is achieved, improving the practicability of the device. The positioning mechanism 9 includes a support spring 901 and a telescopic column 902. A positioning block B 10 is fixedly connected to the edge of one side of the top of the threaded barrel 7. Limit plates 11 are fixedly connected to both sides of the surfaces of the first connecting plate 1 and the second connecting plate 3;

[0027] Please refer to Figure 2 , the servo motor 601 is fixedly connected to the inside of the motor box 5. The output end of the servo motor 601 is fixedly connected to the forward and reverse lead screw 602. The servo motor 601 facilitates the rotation of the forward and reverse lead screw 602;

[0028] Please refer to Figure 2 , the fixed block 801 is fixedly connected to the top of the threaded barrel 7. Two rotating shafts 802 are fixedly connected to the top of the fixed block 801. A connecting rod 803 is rotatably connected to the surface of the rotating shaft 802. One end of the connecting rod 803 is rotatably connected to the positioning block A 804. The positioning block A 804 is slidably connected to the surface of the limit plate 11. The positioning block A 804 facilitates fixing the workpiece;

[0029] Please refer to Figure 4 , the support spring 901 is fixedly connected to the inside of the fixing column 12. One end of the support spring 901 is fixedly connected to the telescopic column 902. The telescopic column 902 is slidably connected to the inside of the fixing column 12. The support spring 901 facilitates providing a supporting force;

[0030] Please refer to Figure 1 , four support columns 13 are fixedly connected to the bottom surfaces of the first connecting plate 1 and the second connecting plate 3, and a bottom plate 14 is fixedly connected to the bottom of the support columns 13. The support columns 13 facilitate the support of the first connecting plate 1 and the second connecting plate 3;

[0031] Please refer to Figure 3 , sliding grooves are provided on the surfaces of the first connecting plate 1 and the second connecting plate 3, and the positioning block B10 is slidably connected to the inside of the sliding groove. The sliding groove facilitates the positioning of the positioning block B10;

[0032] Please refer to Figure 3 , the end of the forward and reverse lead screw 602 is rotatably connected to a support block 15, and the support block 15 is fixedly connected to the bottom surface of the second connecting plate 3. The support block 15 facilitates the support of the forward and reverse lead screw 602.

[0033] In the present utility model, the working steps of the device are as follows:

[0034] The first step: Place the workpiece on the surfaces of the first connecting plate 1 and the second connecting plate 3, and then start the servo motor 601 inside the motor box 5. The servo motor 601 drives the forward and reverse lead screw 602 on one side to rotate. The two threaded barrels 7 on the surface of the forward and reverse lead screw 602 move relative to each other on the surface of the forward and reverse lead screw 602. During the movement, the connecting rods 803 rotatably connected to both sides of the top will pull the positioning block A804 at the end and move relative to each other under the limitation of the limiting plate 11. Cooperating with the positioning block B10 on the top of the threaded barrel 7, the positioning block A804 and the positioning block B10 can move relative to each other simultaneously and move closer to the workpiece position in the middle, improving the stability of the workpiece during processing;

[0035] The second step: When clamping a special-shaped workpiece, a plurality of fixing columns 12 are provided on the surface of the positioning block A804, and a support spring 901 is further provided inside the fixing column 12. The support spring 901 deforms under force and provides a reverse force to support the telescopic column 902 on one side to press against the surface of the workpiece. Due to the plasticity of the support spring 901, the telescopic column 902 can closely fit the workpiece with uneven surface.

[0036] It should be noted that the device structure and drawings of the present utility model mainly describe the principle of the present utility model. Based on the technical principle of this design, the settings of the power mechanism, power supply system and control system of the device are not fully described. Under the premise that those skilled in the art understand the principle of the above utility model, the specific power mechanism, power supply system and control system can be clearly obtained. The control method of the application document is automatically controlled by a controller, and the control circuit of the controller can be realized by simple programming by those skilled in the art;

[0037] The standard parts used can all be purchased from the market, and can also be customized according to the descriptions in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. The machines, parts and equipment all adopt conventional models in the prior art, and the components known to those skilled in the art, their structures and principles can all be learned by those skilled in the art through technical manuals or through conventional experimental methods.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision positioning device for a gantry machining center, comprising a first connecting plate (1), characterized in that: The back of the first connecting plate (1) is fixedly connected to a connecting block (2), the back of the connecting block (2) is fixedly connected to a second connecting plate (3), the bottom of the first connecting plate (1) is fixedly connected to an extension block (4), one side of the extension block (4) is fixedly connected to a motor box (5), the interior of the motor box (5) is fixedly connected to a driving mechanism (6), the driving mechanism (6) comprises a servo motor (601) and a forward and reverse screw rod (602), the surface of the forward and reverse screw rod (602) is threadedly connected to two threaded barrels (7), the top of the threaded barrel (7) is fixedly connected to a linkage clamping mechanism ( 8), the linkage clamping mechanism (8) comprises a fixed block (801), a rotating shaft (802), a connecting rod (803) and a positioning block A (804), the surface of the positioning block A (804) is fixedly connected with a plurality of fixed columns (12), the interior of the fixed column (12) is fixedly connected with a positioning mechanism (9), the positioning mechanism (9) comprises a supporting spring (901) and a telescopic column (902), the edge of one side of the top of the threaded cylinder (7) is fixedly connected with a positioning block B (10), and both sides of the surface of the first connecting plate (1) and the second connecting plate (3) are fixedly connected with a limiting plate (11).

2. A high-precision positioning device for a gantry machining center according to claim 1, characterized in that: The servo motor (601) is fixedly connected to the inside of the motor box (5), and the output end of the servo motor (601) is fixedly connected to a forward and reverse screw rod (602).

3. The high-precision positioning device for a gantry machining center according to claim 1, characterized in that: The fixed block (801) is fixedly connected to the top of the threaded cylinder (7), and the top of the fixed block (801) is fixedly connected to two rotating shafts (802). The surface of the rotating shaft (802) is rotatably connected to a connecting rod (803), and one end of the connecting rod (803) is rotatably connected to a positioning block A (804), and the positioning block A (804) is slidably connected to the surface of the limiting plate (11).

4. The high-precision positioning device for a gantry machining center according to claim 1, characterized in that: The support spring (901) is fixedly connected to the interior of the fixed column (12); one end of the support spring (901) is fixedly connected to a telescopic column (902); and the telescopic column (902) is slidably connected to the interior of the fixed column (12).

5. The high-precision positioning device for a gantry machining center according to claim 1, characterized in that: Four support columns (13) are fixedly connected to the bottom surfaces of the first connecting plate (1) and the second connecting plate (3), and a bottom plate (14) is fixedly connected to the bottom of the support columns (13).

6. The high-precision positioning device for a gantry machining center according to claim 1, characterized in that: The surfaces of the first connecting plate (1) and the second connecting plate (3) are both provided with sliding grooves, and the positioning block B (10) is slidably connected to the inside of the sliding grooves.

7. The high-precision positioning device for a gantry machining center according to claim 1, characterized in that: The ends of the forward and reverse screw rods (602) are rotatably connected to support blocks (15), and the support blocks (15) are fixedly connected to the bottom surface of the second connecting plate (3).

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