A fixture for solving machine reversing line

Abstract

The utility model provides a kind of fixture for solving machine tool commutation line, including wedge, base and processing platform, base and processing platform are integrated structure, wedge side is equipped with inclined plane, inclined plane is symmetrically provided with mounting hole, base is symmetrically provided with positioning hole, bolt is sequentially passed through positioning hole and mounting hole and is fixed on wedge with base, processing platform bottom surface is fixedly connected with base, processing platform top is equipped with concave spherical surface, concave spherical surface is downward inclined, concave spherical surface is used to carry lens mold, ball cutter is along concave spherical surface surface path from concave spherical surface edge highest point until concave spherical surface edge lowest point all the way downlink processing.The utility model changes concave spherical surface space posture, completely avoids the path that ball cutter drops again climbs in traditional processing, avoids generating commutation line, since all the way downlink cutting makes that tool mark is continuous even, can improve surface quality and surface roughness, since avoiding commutation impact, can prolong the service life of tool, reduce tool changing frequency.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, and in particular to a fixture for solving the problem of machine tool reversing lines. Background Technology

[0002] In CNC machining of optical lens molds, the traditional method involves horizontally mounting the machining table with a concave spherical surface onto the machine tool. The ball cutter starts machining from the highest point of the concave spherical edge and moves radially towards the lowest point of the center. During this process, the ball cutter must first move downwards to the lowest point and then upwards to the highest point. This climbing path causes a sudden change in the toolpath direction, forming a reversal line on the spherical surface. This directly affects the optical surface accuracy, light-gathering performance, and appearance quality of the machined lens, resulting in product quality that fails to meet customer requirements.

[0003] Therefore, it is necessary to provide a fixture for solving the commutation line of machine tools to overcome the shortcomings of the existing technology. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a fixture for solving the commutation line of a machine tool.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A fixture for solving the reversing line of a machine tool includes a wedge block, a base, and a machining table. The base and the machining table are an integral structure. One side of the wedge block has an inclined surface with symmetrical mounting holes. The base has symmetrical positioning holes. Bolts pass through the positioning holes and mounting holes in sequence to fix the base to the wedge block. The bottom surface of the machining table is fixed to the base. The top of the machining table has a concave spherical surface that is inclined downwards. The concave spherical surface is used to support the lens mold. The ball cutter moves down along the surface path of the concave spherical surface from the highest point of the edge to the lowest point of the edge of the concave spherical surface to process the entire length of the concave spherical surface.

[0007] The wedge block is mounted on the frame. The wedge block, base, and machining table are considered as a single integrated structure. The ball cutter descends along the path of the concave spherical surface from the highest point of the concave spherical edge to the lowest point of the concave spherical edge. By changing the spatial posture of the concave spherical surface, the traditional "descending and then ascending" path of the ball cutter is completely avoided. This path inevitably produces a reversal line. Because the cutting is done in a continuous downward direction, the tool marks are continuous and uniform, which can improve the surface quality and surface roughness. By avoiding the reversal impact, the tool life can be extended and the frequency of tool changes can be reduced.

[0008] The present invention is further configured such that the inclination of the inclined plane is 45 degrees.

[0009] The present invention is further configured such that the bottom surface of the base is in contact with the inclined surface.

[0010] The present invention is further configured such that the axis of the concave spherical surface is perpendicular to the inclined surface.

[0011] The present invention is further configured such that the mounting hole is a countersunk hole and the positioning hole is a through hole.

[0012] The present invention is further configured such that the axis of symmetry of the positioning hole coincides with the axis of symmetry of the mounting hole, thereby ensuring the alignment accuracy of the base and the inclined block.

[0013] The present invention is further provided that the contact surface between the base and the inclined surface is provided with cross-knurled anti-slip texture.

[0014] In summary, this utility model has the following beneficial effects:

[0015] 1. This utility model completely avoids the "first descend and then ascend" path of the ball cutter in traditional machining by changing the spatial posture of the concave spherical surface, thus avoiding the generation of reversal lines. Since the cutting is carried out in a downward direction throughout the entire process, the tool marks are continuous and uniform, which can improve the surface quality and surface roughness. Since the reversal impact is avoided, the tool life can be extended and the tool change frequency can be reduced.

[0016] 2. This utility model can eliminate assembly eccentricity, reduce errors, and improve torsional stiffness through its double symmetrical structure. The cross-knurled anti-slip texture can improve the friction coefficient and wear resistance life, provide emergency protection when bolts are loose, and further improve the firmness of the base and inclined block assembly, preventing workpiece slippage. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a side view of the present invention.

[0019] Figure 3 This is a top view of the present invention.

[0020] Figure 4 This is a utility model Figure 3 Cross-sectional view of AA.

[0021] Figure 5 This is a schematic diagram of the inclined block of this utility model.

[0022] Figure 6 This is a schematic diagram of the structure of a traditional fixture.

[0023] Figure 7 This is a top view of a traditional jig.

[0024] Figure 8 yes Figure 7 Cross-sectional view of BB.

[0025] In the diagram, 1. Inclined block, 11. Inclined surface, 111. Mounting hole, 2. Base, 21. Positioning hole, 3. Machining table, 31. Concave spherical surface, 4. Reversing line. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0027] Example 1:

[0028] In this embodiment, as Figure 1 As shown, the present invention proposes a fixture for solving the reversing line of a machine tool, including a wedge block 1, a base 2, and a machining table 3. The base and the machining table are an integral structure. One side of the wedge block is provided with a wedge surface 11, and the wedge surface is symmetrically provided with mounting holes 111. The base is symmetrically provided with positioning holes 21. Bolts pass through the positioning holes and mounting holes in sequence to fix the base to the wedge block. The bottom surface of the machining table is fixedly connected to the base. The top of the machining table is provided with a concave spherical surface 31, which is inclined downwards. The concave spherical surface is used to support the lens mold. The ball cutter moves down along the surface path of the concave spherical surface from the highest point of the edge of the concave spherical surface to the lowest point of the edge of the concave spherical surface for machining.

[0029] In this example, the wedge is mounted on the frame, and the wedge, base, and machining table are considered as a single integrated structure. The ball cutter descends along the path of the concave spherical surface from the highest point of the concave spherical edge to the lowest point of the concave spherical edge. By changing the spatial posture of the concave spherical surface, the traditional path of the ball cutter "descending and then ascending" is completely avoided. This path will inevitably produce a reversal line 4. Since the cutting is done downwards throughout the entire process, the tool marks are continuous and uniform, which can improve the surface quality and surface roughness. Since the reversal impact is avoided, the tool life can be extended and the tool change frequency can be reduced.

[0030] The present invention is further configured such that the inclination of the inclined plane is 45 degrees.

[0031] In this example, 45 degrees is the preferred angle. The 45-degree inclination angle makes the normal component of the cutting force on the inclined plane equal to the tangential component, suppressing vibration. 45 degrees is the commonly used angle, which facilitates standardized docking and improves connection accuracy.

[0032] In this embodiment, the bottom surface of the base is further configured to fit against the inclined surface.

[0033] In this example, the complete fit between the base and the inclined plane reduces the load per unit area, avoids local deformation, reduces micro-vibrations, and improves heat transfer efficiency.

[0034] In this embodiment, the axis of the concave spherical surface is further configured to be perpendicular to the inclined plane.

[0035] In this example, since the inclination of the inclined plane is 45 degrees, the spatial orientation of the axis of the concave spherical surface is also fixed, which can satisfy the requirement that the ball cutter moves down along the path of the concave spherical surface from the highest point of the edge to the lowest point for machining.

[0036] In this embodiment, the mounting hole is a countersunk hole and the positioning hole is a through hole.

[0037] In this example, the countersunk hole structure accommodates the bolt head, preventing it from impacting the machine tool spindle and improving assembly reliability. The through hole design can increase the bolt insertion speed and reduce the clamping time per setup.

[0038] In this embodiment, the symmetrical axis of the positioning hole coincides with the symmetrical axis of the mounting hole to ensure the alignment accuracy of the base and the inclined block.

[0039] In this example, both the positioning holes and the mounting holes are provided in pairs. The double symmetrical structure can eliminate assembly eccentricity, reduce errors, and improve torsional stiffness.

[0040] In this embodiment, the base and the inclined surface are further provided with cross-knurled anti-slip texture.

[0041] In this example, the anti-slip texture increases the coefficient of friction and improves wear life, provides emergency protection in case of bolt loosening, further enhances the stability of the base and wedge assembly, and prevents workpiece slippage.

[0042] Example 2:

[0043] In this embodiment, as Figure 2 As shown, the difference between the existing traditional processing method and Example 1 is that the base is directly mounted on the machine tool. The ball cutter starts from the highest point of the edge of the concave spherical surface, follows the path along the surface of the concave spherical surface to the lowest point of the center of the concave spherical surface, and then follows the path along the surface of the concave spherical surface to the highest point of the center of the concave spherical surface. At the lowest point of the center of the concave spherical surface, due to the sudden change in the direction of the tool path, a reversal line is formed on the surface of the spherical surface. This directly affects the optical surface accuracy, light-gathering performance and appearance quality of the lens processed later. Due to the impact of the reversal, the tool's service life decreases and the tool replacement frequency increases.

[0044] The working principle of this fixture for solving the machine tool reversal line is as follows: by adding a 45-degree inclined block and assembling the base and machining table on the inclined surface, the ball cutter is made to move down along the path of the concave spherical surface from the highest point of the concave spherical edge to the lowest point of the concave spherical edge, thus completely avoiding the reversal line generated in traditional machining.

[0045] In the description of this utility model, it should be noted that when terms such as "upper," "lower," "inner," "outer," "left," and "right" appear to indicate orientation or positional relationships, they should be understood as being based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the product of this utility model is in use, or the orientation or positional relationships commonly understood by those skilled in the art. These terms are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, when terms such as "first" and "second" appear, they are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that unless otherwise explicitly specified and limited, terms such as "installation," "setting," and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A fixture for solving the commutation line problem in machine tools, characterized in that, It includes a wedge block, a base, and a processing table. The base and processing table are an integral structure. The wedge block has a wedge surface on one side, and mounting holes are symmetrically opened on the wedge surface. The base has symmetrical positioning holes. Bolts pass through the positioning holes and mounting holes in sequence to fix the base to the wedge block. The bottom surface of the processing table is fixed to the base. The top of the processing table has a concave spherical surface, which is used to support the lens mold. The ball cutter moves down along the path of the concave spherical surface from the highest point of the edge of the concave spherical surface to the lowest point of the edge of the concave spherical surface to process the entire length.

2. The fixture for solving the commutation line problem of a machine tool according to claim 1, characterized in that, The slope is inclined at 45 degrees.

3. The fixture for solving the commutation line problem of a machine tool according to claim 1, characterized in that, The bottom surface of the base fits into the inclined surface.

4. A fixture for solving the commutation line problem of a machine tool according to claim 1, characterized in that, The axis of a concave sphere is perpendicular to the inclined plane.

5. A fixture for solving the commutation line problem of a machine tool according to claim 1, characterized in that, The mounting holes are countersunk holes, and the positioning holes are through holes.

6. A fixture for solving the commutation line problem of a machine tool according to claim 1, characterized in that, The axis of symmetry of the positioning hole coincides with the axis of symmetry of the mounting hole, ensuring the alignment accuracy of the base and the inclined block.

7. A fixture for solving the commutation line problem of a machine tool according to claim 1, characterized in that, The base and the inclined surface have cross-knurled anti-slip texture.

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