Pre-pressing mechanism and workpiece positioning assembly of numerical control machining center

Abstract

The utility model relates to the technical field of workpiece positioning, in particular to a pre-pressing mechanism and a numerical control machining center workpiece positioning assembly, which comprise a positioning restraint plate, a pre-pressing assembly, a fixing assembly and a rotating assembly, a rotating restraint column is arranged on one side of the positioning restraint plate, and two rotating limiting blocks are arranged on the positioning restraint plate. One end of each rotating limiting block is connected to the corresponding rotating restraining column in a sleeving mode, restraining limiting grooves are formed in the inner sides of the rotating limiting blocks, inserting limiting grooves are formed in the inner sides of the rotating limiting blocks, each restraining limiting groove communicates with the corresponding inserting limiting groove, and rotating limiting grooves are formed in the inner sides of the rotating limiting blocks. And one end of the inserting restraining block is aligned with the inserting fixing groove, the abutting fixing plate extrudes and positions the workpiece in the process, then the rotating locking piece is rotated, the threaded sleeve drives the inserting restraining block to press downwards for restraining, pre-pressing can be conducted conveniently and rapidly, and the installation time of workers is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece positioning, in particular to a preloading mechanism and a workpiece positioning component of a numerical control machining center. Background Technique

[0002] The workpiece positioning components of a numerical control machining center are key factors to ensure machining accuracy and efficiency. These components include various fixtures and positioning elements for fixing, supporting and aligning workpieces. Fixtures are mainly used to guide the operation of tools, such as drilling fixtures, indexing fixtures, turning fixtures, milling fixtures and grinding fixtures, etc. Each fixture is customized for specific machining operations;

[0003] After some workpieces are positioned, a certain amount of force is applied to the workpieces for preloading, so that they can be locked smoothly to ensure the stability and accuracy of the workpieces during the machining process;

[0004] However, the preloading method for some workpieces is very cumbersome and requires a lot of time for workers to operate. Content of the Utility Model

[0005] The purpose of the utility model is to provide a preloading mechanism and a workpiece positioning component of a numerical control machining center to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A preloading mechanism, the preloading mechanism includes:

[0008] A positioning and restraining plate, one side of the positioning and restraining plate is provided with a rotating restraint column, the positioning and restraining plate is provided with two rotating limit blocks, one end of each rotating limit block is sleeved on the corresponding rotating restraint column, a restraint limit groove is opened inside the rotating limit block, a plugging limit groove is opened inside the rotating limit block, each restraint limit groove is communicated with the plugging limit groove, a rotating limit groove is opened inside each rotating limit block, and each rotating limit groove is communicated with the plugging limit groove;

[0009] A preloading component, the preloading component is arranged inside the restraint limit groove, and the preloading component includes a restraint connecting plate, a butting fixing plate and a return spring;

[0010] A fixing component, the fixing component is arranged inside the plugging limit groove, and the fixing component includes a plugging connecting plate, a plugging restraint block and a threaded sleeve;

[0011] A rotating component, one end of the rotating component is arranged inside the rotating limit groove, and the rotating component includes a rotating restraint block, a rotating stud and a rotating locking piece.

[0012] Preferably, a constraint connecting plate is provided inside each of the constraint limiting grooves, an abutting fixing plate is provided on one side of each constraint connecting plate, two guiding sleeves are provided on one side of each constraint connecting plate, and two guiding constraint columns are provided inside each constraint limiting groove.

[0013] Preferably, each of the guiding constraint columns is sleeved inside the corresponding guiding sleeve, a return spring is provided on one side of each constraint connecting plate, and each return spring is sleeved on the corresponding guiding sleeve.

[0014] Preferably, an insertion connecting plate is provided inside each of the insertion limiting grooves, an insertion constraint block is provided on one side of each insertion connecting plate, and one end of each insertion connecting plate abuts against the constraint connecting plate.

[0015] Preferably, a threaded sleeve is provided on one side of each insertion connecting plate, a rotation constraint block is provided inside each rotation limiting groove, a rotation stud is provided on one side of each rotation constraint block, and one end of each rotation stud is inserted inside the threaded sleeve.

[0016] Preferably, each threaded sleeve is threadedly connected to the rotation stud, a rotation locking member is provided on one side of each rotation constraint block, and one end of each rotation locking member penetrates through the rotation limiting block and is suspended.

[0017] Preferably, two insertion fixing grooves are formed on one side of the positioning constraint plate, one end of each insertion constraint block is inserted inside the insertion fixing groove, a positioning workpiece is provided between each positioning constraint plate and the two rotation limiting blocks, and one end of each abutting fixing plate penetrates through the rotation limiting block and abuts against the positioning workpiece.

[0018] A workpiece positioning component for a CNC machining center, the workpiece positioning component of the CNC machining center having the above-mentioned preloading mechanism.

[0019] Compared with the prior art, the beneficial effects of the present utility model are:

[0020] After placing the positioning workpiece at the designated position, one end of the insertion constraint block is aligned with the insertion fixing groove. During the process, the abutting fixing plate presses the positioning workpiece. Subsequently, rotate the rotation locking member to drive the threaded sleeve to press the insertion constraint block downward for constraint. This device can preload conveniently and quickly, improving the installation time of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0022] Figure 2 is a schematic diagram of a partial structure of the present utility model;

[0023] Figure 3 is a schematic diagram of the structure of the preloading component of the present utility model;

[0024] Figure 4 Structural schematic diagram of the fixing component of the present utility model;

[0025] Figure 5 Structural schematic diagram of the rotation limiting block of the present utility model;

[0026] Figure 6 Structural schematic diagram of the abutting fixing plate of the present utility model.

[0027] In the figure: positioning and restraining plate 1, rotation restraining column 2, rotation limiting block 3, restraining limiting groove 4, insertion limiting groove 5, rotation limiting groove 6, restraining connecting plate 7, abutting fixing plate 8, guiding sleeve 9, guiding restraining column 10, return spring 11, insertion connecting plate 12, insertion restraining block 13, threaded sleeve 14, rotation restraining block 15, rotation stud 16, rotation locking member 17, insertion fixing groove 18, positioning workpiece 19. Specific implementation manners

[0028] In order to clearly and completely describe the purpose, technical solution of the present utility model and make the advantages more clearly understood, the following further details the embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are some but not all of the embodiments of the present utility model, and are only used to explain the embodiments of the present utility model, not to limit the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0029] Embodiment 1: Please refer to Figures 1-6 , the present utility model provides three technical solutions:

[0030] A preloading mechanism includes:

[0031] One side of the positioning and restraining plate 1 is provided with a rotation restraining column 2. Two rotation limiting blocks 3 are provided on the positioning and restraining plate 1. One end of each rotation limiting block 3 is sleeved on the corresponding rotation restraining column 2. A restraining limiting groove 4 is opened inside the rotation limiting block 3. An insertion limiting groove 5 is opened inside the rotation limiting block 3. Each restraining limiting groove 4 communicates with the insertion limiting groove 5. A rotation limiting groove 6 is opened inside each rotation limiting block 3. Each rotation limiting groove 6 communicates with the insertion limiting groove 5. The preloading assembly is arranged inside the restraining limiting groove 4. The preloading assembly includes a restraining connecting plate 7, an abutting fixing plate 8, and a return spring 11. A restraining connecting plate 7 is provided inside each restraining limiting groove 4. An abutting fixing plate 8 is provided on one side of each restraining connecting plate 7. Two guiding sleeves 9 are provided on one side of each restraining connecting plate 7. Two guiding restraining columns 10 are provided inside each restraining limiting groove 4. A restraining block is welded on the rotation restraining column 2, which can prevent the rotation limiting block 3 from detaching from the restraint;

[0032] Each guiding restraint post 10 is sleeved inside the corresponding guiding sleeve 9. One side of each restraint connecting plate 7 is provided with a return spring 11, and each return spring 11 is sleeved on the corresponding guiding sleeve 9. The guiding sleeve 9 can prevent the return spring 11 from becoming disengaged and thus inoperable.

[0033] Embodiment 2: On the basis of Embodiment 1, the fixing assembly is arranged inside the plug-in limiting groove 5. The fixing assembly includes a plug-in connecting plate 12, a plug-in restraint block 13, and a threaded sleeve 14. A plug-in connecting plate 12 is arranged inside each plug-in limiting groove 5. A plug-in restraint block 13 is provided on one side of each plug-in connecting plate 12. One end of each plug-in connecting plate 12 abuts against the restraint connecting plate 7. The plug-in restraint block 13 can be inserted downward into the inner side of the plug-in fixing groove 18, thereby preventing the rotation limiting block 3 from rotating.

[0034] A threaded sleeve 14 is provided on one side of each plug-in connecting plate 12. A rotation restraint block 15 is arranged inside each rotation limiting groove 6. A rotation stud 16 is provided on one side of each rotation restraint block 15. One end of each rotation stud 16 is inserted inside the threaded sleeve 14. The threaded sleeve 14 can drive it to move up and down when the rotation stud 16 rotates.

[0035] Embodiment 3: On the basis of Embodiment 2, one end of the rotation assembly is arranged inside the rotation limiting groove 6. The rotation assembly includes a rotation restraint block 15, a rotation stud 16, and a rotation locking piece 17. Each threaded sleeve 14 is threadedly connected to the rotation stud 16. A rotation locking piece 17 is provided on one side of each rotation restraint block 15. One end of each rotation locking piece 17 penetrates through the rotation limiting block 3 and is suspended. Two plug-in fixing grooves 18 are formed on one side of the positioning restraint plate 1. One end of each plug-in restraint block 13 is inserted inside the plug-in fixing groove 18. A positioning workpiece 19 is arranged between each positioning restraint plate 1 and the two rotation limiting blocks 3. One end of each abutting and fixing plate 8 penetrates through the rotation limiting block 3 and abuts against the positioning workpiece 19. When in use, after placing the positioning workpiece 19 at the specified position, rotate the rotation limiting block 3 to align one end of the plug-in restraint block 13 with the plug-in fixing groove 18. During the process, the abutting and fixing plate 8 presses the positioning workpiece 19. Subsequently, rotate the rotation locking piece 17 to drive the threaded sleeve 14 to press the plug-in restraint block 13 downward for restraint. Among them, the plug-in connecting plate 12 can assist the return spring 11 to jointly restrain the abutting and fixing plate 8, improving the stability of the positioning workpiece 19.

[0036] 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 principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A preloading mechanism, characterized in that: The preloading mechanism includes: A positioning and constraining plate (1), on one side of which there is a rotation constraining column (2). There are two rotation limiting blocks (3) on the positioning and constraining plate (1). One end of each rotation limiting block (3) is sleeved on the corresponding rotation constraining column (2). A constraining limiting groove (4) is formed inside the rotation limiting block (3), and a plugging limiting groove (5) is formed inside the rotation limiting block (3). Each constraining limiting groove (4) communicates with the plugging limiting groove (5), and a rotation limiting groove (6) is formed inside each rotation limiting block (3). Each rotation limiting groove (6) communicates with the plugging limiting groove (5); A preloading component, which is arranged inside the constraining limiting groove (4). The preloading component includes a constraining connecting plate (7), an abutting fixing plate (8), and a return spring (11); A fixing component, which is arranged inside the plugging limiting groove (5). The fixing component includes a plugging connecting plate (12), a plugging constraining block (13), and a threaded sleeve (14); A rotation component, one end of which is arranged inside the rotation limiting groove (6). The rotation component includes a rotation constraining block (15), a rotation screw (16), and a rotation locking part (17).

2. The preloading mechanism according to claim 1, characterized in that: A constraining connecting plate (7) is arranged inside each constraining limiting groove (4). An abutting fixing plate (8) is arranged on one side of each constraining connecting plate (7). Two guiding sleeves (9) are arranged on one side of each constraining connecting plate (7). Two guiding constraining columns (10) are arranged inside each constraining limiting groove (4).

3. A preloading mechanism according to claim 2, characterized in that: Each guiding constraining column (10) is sleeved inside the corresponding guiding sleeve (9). A return spring (11) is arranged on one side of each constraining connecting plate (7). Each return spring (11) is sleeved on the corresponding guiding sleeve (9).

4. A preloading mechanism according to claim 3, characterized in that: A plugging connecting plate (12) is arranged inside each plugging limiting groove (5). A plugging constraining block (13) is arranged on one side of each plugging connecting plate (12). One end of each plugging connecting plate (12) abuts against the constraining connecting plate (7).

5. A preloading mechanism according to claim 4, characterized in that: A threaded sleeve (14) is arranged on one side of each plugging connecting plate (12). A rotation constraining block (15) is arranged inside each rotation limiting groove (6). A rotation screw (16) is arranged on one side of each rotation constraining block (15). One end of each rotation screw (16) is inserted inside the threaded sleeve (14).

6. The preloading mechanism according to claim 5, characterized in that: Each threaded sleeve (14) is threadedly connected to the rotation screw (16). A rotation locking part (17) is arranged on one side of each rotation constraining block (15). One end of each rotation locking part (17) penetrates through the rotation limiting block (3) and is suspended.

7. A preloading mechanism according to claim 6, characterized in that: Two plugging fixing grooves (18) are formed on one side of the positioning and constraining plate (1). One end of each plugging constraining block (13) is inserted inside the plugging fixing groove (18). A positioning workpiece (19) is arranged between each positioning and constraining plate (1) and the two rotation limiting blocks (3). One end of each abutting fixing plate (8) penetrates through the rotation limiting block (3) and abuts against the positioning workpiece (19).

8. A workpiece positioning component of a numerically controlled machining center, characterized in that: The workpiece positioning component of the CNC machining center has the preloading mechanism described in any one of claims 1-7 above.

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