Precise machine manufacturing clamp

Abstract

The utility model belongs to the technical field of precision machining, and particularly relates to a precision machine manufacturing clamp which comprises an installation shell, a plurality of exhaust fans are arranged at one end of the installation shell, a plurality of air holes are evenly formed in the top end of the installation shell, and two sets of fixing plates are symmetrically arranged at the two ends of the installation shell. An electric push rod is arranged on one side of the fixed plate, a fixed clamping plate is arranged at the output end of the electric push rod, a telescopic clamping plate is arranged on one side of the fixed clamping plate, and a plurality of compression springs are connected between the fixed clamping plate and the telescopic clamping plate. The interior of the mounting shell can be pumped into negative pressure through the exhaust fan, so that the workpieces are adsorbed through the air holes, and the adsorption mode has low requirements on the contact surfaces of the workpieces and is high in universality; and meanwhile, the telescopic clamping plate and the compression spring are arranged at the front end of the fixed clamping plate, the clamping force controllability can be achieved by controlling the shrinkage amount of the compression spring, and therefore it is guaranteed that workpieces with different strengths are effectively clamped.

Description

Technical Field

[0001] The utility model belongs to the technical field of precision machining, and particularly relates to a fixture for precision machinery manufacturing. Background Art

[0002] In recent years, the mechanical manufacturing technology has developed rapidly, and the production efficiency and technical precision have been continuously improved. In the process of precision part machining, it is often necessary to fix the precision parts with a fixture before subsequent processes can be carried out. Moreover, the mechanical parts to be processed are often small in size, complex in structure and irregular in shape. When machining these parts, special fixtures are often required, and fixtures with corresponding clamping grooves are designed according to the shape of the parts. In the process of clamping the workpiece with the existing fixture, the clamping plate lacks a positioning and guiding structure during movement, resulting in poor stability of the clamping plate movement and poor clamping effect on the workpiece.

[0003] After investigation, the patent number CN217776247U discloses a fixture for precision machining and manufacturing, which discloses "including a base, two sides of the bottom of the base are welded with support plates, and two sides of the top of the base are welded with fixing plates. The inner side of the fixing plate is connected with an electric push rod, and the end of the electric push rod is connected with a clamping plate. A rubber pad is bonded to the inner side of the clamping plate, and square grooves are formed in the front and rear sides of the inside of the base. A smooth rod is installed in the square groove, and a collar is sleeved on the outside of the smooth rod" and other technical features, and has technical effects such as high smoothness during the movement of the clamping plate, resulting in a better clamping effect.

[0004] However, when the fixture is actually used, the clamping force of the clamping plate cannot be controlled. If the clamping force is small, the workpiece is likely to loosen; if the clamping force is large, it is easy to damage the fragile workpiece. At the same time, the fixture uses a sealing ring to adsorb and fix the workpiece. This fixing method requires the contact surface of the workpiece to be flat and the contact surface to be larger than the diameter of the sealing ring. Therefore, it is not universal and needs to be improved.

[0005] To solve the above problems, a fixture for precision machinery manufacturing is proposed in this application. Summary of the Utility Model

[0006] To solve the problems raised in the above background art, the utility model provides a fixture for precision machinery manufacturing, which has the characteristics of intuitive and controllable clamping force and strong versatility.

[0007] To achieve the above object, the present utility model provides the following technical solutions: a precision machinery manufacturing fixture, including an installation housing, one end of the installation housing is provided with a plurality of exhaust fans, the top end of the installation housing is evenly provided with a plurality of air holes, and two groups of fixing plates are symmetrically arranged at both ends of the installation housing; one side of the fixing plate is provided with an electric push rod, the output end of the electric push rod is provided with a fixed clamping plate, one side of the fixed clamping plate is provided with a telescopic clamping plate, and a plurality of compression springs are connected between the fixed clamping plate and the telescopic clamping plate.

[0008] Preferably, the whole installation housing of the precision machinery manufacturing fixture of the present utility model is a sealed structure, and the air flow direction of the exhaust fan is towards the outside of the installation housing.

[0009] Preferably, a sliding groove is provided in the middle of the fixed clamping plate of the precision machinery manufacturing fixture of the present utility model, and a guiding plate matched with the sliding groove is provided on the telescopic clamping plate.

[0010] Preferably, the sliding groove and the guiding plate are in clearance fit, and a locking bolt abutted against the sliding groove is rotatably connected in the middle of the guiding plate.

[0011] Preferably, a cylindrical groove for accommodating the compression spring is provided on the fixed clamping plate of the precision machinery manufacturing fixture of the present utility model, and the depth of the cylindrical groove is less than the length of the compression spring.

[0012] Preferably, a protective pad is provided on one side of the telescopic clamping plate away from the fixed clamping plate of the precision machinery manufacturing fixture of the present utility model.

[0013] Compared with the prior art, the beneficial effects of the present utility model are: the exhaust fan can be used to evacuate the inside of the installation housing to a negative pressure, so as to adsorb the workpiece through the air holes. This adsorption method has low requirements for the contact surface of the workpiece and strong versatility; at the same time, by arranging a telescopic clamping plate and a compression spring at the front end of the fixed clamping plate, the controllability of the clamping force can be realized by controlling the contraction amount of the compression spring, so as to ensure the effective clamping of workpieces with different strengths. Description of the Drawings

[0014] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:

[0015] Figure 1 is a schematic structural diagram of the present utility model;

[0016] Figure 2 is a schematic structural diagram of the installation housing in the present utility model;

[0017] Figure 3It is a cross-sectional view of the present utility model;

[0018] Figure 4 It is a schematic diagram of the cooperation between the fixed clamping plate and the telescopic clamping plate in the present utility model.

[0019] In the figure: 1. Installation housing; 2. Exhaust fan; 3. Air holes; 4. Fixed plate; 5. Electric push rod; 6. Fixed clamping plate; 7. Telescopic clamping plate; 8. Compression spring; 9. Sliding groove; 10. Guide plate; 11. Locking bolt; 12. Cylindrical groove; 13. Protective pad. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0021] Embodiment 1

[0022] As Figure 1 , Figure 2 and Figure 3 shown;

[0023] A precision machinery manufacturing fixture, including an installation housing 1, one end of the installation housing 1 is provided with a plurality of exhaust fans 2, the top end of the installation housing 1 is evenly provided with a plurality of air holes 3, and two groups of fixed plates 4 are symmetrically arranged at both ends of the installation housing 1; an electric push rod 5 is provided on one side of the fixed plate 4, the output end of the electric push rod 5 is provided with a fixed clamping plate 6, a telescopic clamping plate 7 is provided on one side of the fixed clamping plate 6, and a plurality of compression springs 8 are connected between the fixed clamping plate 6 and the telescopic clamping plate 7. The installation housing 1 is a sealed structure, and the air flow direction of the exhaust fan 2 is towards the outside of the installation housing 1.

[0024] In this implementation scheme: The exhaust fan 2 can be used to evacuate the inside of the installation housing 1 to a negative pressure, so as to adsorb the workpiece through the air holes 3. This adsorption method has low requirements for the contact surface of the workpiece and strong versatility; at the same time, by arranging the telescopic clamping plate 7 and the compression spring 8 at the front end of the fixed clamping plate 6, the controllability of the clamping force can be realized by controlling the contraction amount of the compression spring 8, so as to ensure the effective clamping of workpieces with different strengths.

[0025] As Figure 4 shown;

[0026] In an optional embodiment, a sliding groove 9 is provided in the middle of the fixed clamping plate 6, and a guide plate 10 matching the sliding groove 9 is provided on the telescopic clamping plate 7. The sliding groove 9 and the guide plate 10 are in clearance fit, and a locking bolt 11 abutted against the sliding groove 9 is rotatably connected in the middle of the guide plate 10.

[0027] In this embodiment: The inner part of the sliding groove 9 is flat and smooth. The mutual cooperation between the guiding plate 10 and the sliding groove 9 can prevent the telescopic clamping plate 7 from deviating, thus ensuring the stability of clamping. When the compression spring 8 is in the diastolic state, the guiding plate 10 is located in the sliding groove 9, which can prevent the telescopic clamping plate 7 from falling off. The fixing bolt 11 can be used to fix the fixed clamping plate 6 and the telescopic clamping plate 7 to each other.

[0028] Specifically, scale values can be set on the outer side of the sliding groove 9. In this way, the moving amount of the guiding plate 10 in the sliding groove 9 can be visually seen, and thus the contraction amount of the compression spring 8 can be visually judged, and then the clamping force can be controlled (the elastic coefficient of the compression spring 8 is a fixed value, and the clamping force can be calculated through the contraction amount and the elastic coefficient).

[0029] In an alternative embodiment, a cylindrical groove 12 for accommodating the compression spring 8 is provided on the fixed clamping plate 6, and the depth of the cylindrical groove 12 is less than the length of the compression spring 8.

[0030] In this embodiment: The electric push rod 5 continues to push until the compression spring 8 is completely hidden in the cylindrical groove 12. At this time, the fixed clamping plate 6 abuts against the telescopic clamping plate 7, so as to provide a greater clamping force to meet different operation requirements.

[0031] In an alternative embodiment, a protective pad 13 is provided on the side of the telescopic clamping plate 7 away from the fixed clamping plate 6. In this way, the protective pad 13 can be used to abut against the workpiece, so as to avoid leaving indentations on the contact surface of the workpiece.

[0032] The working principle and usage process of the present utility model: Place the workpiece on the top surface of the installation housing 1, start the exhaust fan 2 to evacuate the inside of the installation housing 1 to a negative pressure. At this time, the air holes 3 intake air and apply an adsorption force to the workpiece. Then, start the two groups of electric push rods 5 synchronously. At this time, the two groups of telescopic clamping plates 7 approach each other and then abut against the workpiece. The electric push rod 5 continues to push. At this time, the compression spring 8 contracts and the guiding plate 10 slides in the sliding groove 9. The size of the clamping force can be judged according to the contraction amount of the compression spring 8. Actually, the extension amount of the electric push rod 5 can be adaptively controlled according to the strength of the workpiece. At the same time, the telescopic clamping plate 7 can be fixed by using the locking bolt 11 as needed;

[0033] When the strength of the workpiece is large and a greater clamping force is required, the electric push rod 5 continues to push until the compression spring 8 is completely hidden in the cylindrical groove 12. At this time, the fixed clamping plate 6 abuts against the telescopic clamping plate 7, so as to provide a greater clamping force to meet different operation requirements.

[0034] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A precision machinery manufacturing fixture, comprising a mounting housing (1), characterized in that: One end of the mounting housing (1) is provided with a number of exhaust fans (2), a number of air holes (3) are evenly opened at the top of the mounting housing (1), and two groups of fixing plates (4) are symmetrically arranged at both ends of the mounting housing (1); One side of the fixing plate (4) is provided with an electric push rod (5), the output end of the electric push rod (5) is provided with a fixed clamping plate (6), one side of the fixed clamping plate (6) is provided with a telescopic clamping plate (7), and a number of compression springs (8) are connected between the fixed clamping plate (6) and the telescopic clamping plate (7).

2. The precision machining fixture according to claim 1, characterized in that: The whole mounting housing (1) is a sealed structure, and the air flow direction of the exhaust fan (2) is towards the outside of the mounting housing (1).

3. The precision machining fixture according to claim 2, wherein: A chute (9) is provided in the middle of the fixed clamping plate (6), and a guide plate (10) matching with the chute (9) is provided on the telescopic clamping plate (7).

4. The precision machining fixture according to claim 3, characterized in that: The chute (9) and the guide plate (10) are in clearance fit, and a locking bolt (11) abutted against the chute (9) is rotatably connected in the middle of the guide plate (10).

5. The precision machining fixture according to claim 4, wherein: A cylindrical groove (12) for accommodating the compression spring (8) is provided on the fixed clamping plate (6), and the depth of the cylindrical groove (12) is less than the length of the compression spring (8).

6. The precision machinery manufacturing fixture according to claim 5, characterized in that: A protective pad (13) is provided on the side of the telescopic clamping plate (7) away from the fixed clamping plate (6).

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