Tooling fixture for four-axis machine tool machining

Abstract

The utility model discloses a four -axis machine tool processing frock clamp, including thin wall blank still include: clamping axle, it is used for with machine tool chuck clamping, first cone, it is fixedly arranged in the right side of clamping axle, the big end of first cone is close to clamping axle, guide post, it is fixedly arranged in the right -hand member of first cone, second cone, it is left and right movement setting on the guide post, the big end of second cone is away from the setting of clamping axle, expansion sleeve, it is set up on first cone and second cone, when second cone moves left, the expansion sleeve will take place radial expansion, drive assembly, it is used for driving second cone to move left, wherein, thin wall blank is set up on expansion sleeve, utilizes expansion sleeve and thin wall blank contact, only acts on expansion sleeve when milling cutter processes, and core component such as clamping axle, cone etc. are not damaged, and expansion sleeve as the vulnerable spare can be replaced alone, has improved the multiplicity of frock clamp significantly.

Description

Technical Field

[0001] This utility model belongs to the field of four-axis machine tool technology, and in particular relates to a tooling fixture for four-axis machine tool processing. Background Technology

[0002] Many vocational schools offer a major in CNC machining. Students in this major learn programming knowledge for different types of CNC machine tools and practice machining on these machines.

[0003] In the course of learning four-axis machine tool programming and machining, students will learn how to process thin-walled workpieces using a four-axis machine tool. In practical operation, since the thin-walled workpiece is prone to deformation when directly clamped, a tooling fixture is needed to support it. Usually, a stepped shaft that matches the inner diameter of the thin-walled workpiece is machined as the tooling fixture. The thin-walled workpiece is placed on the shaft, so that one end face of the thin-walled workpiece contacts the step, and a pressure plate is pressed against the other end face of the thin-walled workpiece by bolts to the shaft, thereby clamping it.

[0004] However, this fixture has a problem: some teaching thin-walled workpiece models require features that penetrate the inner hole, necessitating a deeper milling depth during four-axis milling. Since the original fixture's shaft outer diameter matched the thin-walled workpiece's inner diameter, milling deeper would cause it to mill into the fixture's shaft portion. This results in burrs on the shaft portion after machining, leading to inaccurate second-time machining or difficulty in fitting the thin-walled blank into the fixture's shaft portion during a second machining operation. Consequently, the fixture becomes a disposable fixture, which is wasteful and inconvenient for reuse. Summary of the Invention

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a tooling fixture for four-axis machine tool processing, comprising a thin-walled blank, and further comprising:

[0006] Clamping shaft, used for clamping with machine tool chuck;

[0007] The first cone is fixedly mounted on the right side of the clamping shaft, with the larger end of the first cone close to the clamping shaft;

[0008] A guide post is fixedly installed at the right end of the first cone;

[0009] The second cone is mounted on the guide post and moves left and right, with its large end positioned away from the clamping axis;

[0010] An expansion sleeve is fitted onto the first cone and the second cone. When the second cone moves to the left, the expansion sleeve will expand radially.

[0011] A drive component, used to drive the second cone to move to the left;

[0012] The thin-walled blank is fitted onto the expansion sleeve.

[0013] Furthermore, the outer circle of the expansion sleeve is divided into two tightening sections for contacting the inner wall of the thin-walled blank and a clearance section located between the two tightening sections. The outer diameter of the clearance section is smaller than that of the tightening section, and it is used to avoid the milling cutter.

[0014] Furthermore, the driving component includes:

[0015] A threaded post is fixedly mounted on the right end face of the guide post;

[0016] The drive nut has its helix set on a threaded post;

[0017] The end face of the drive nut abuts against the large end face of the second cone.

[0018] Furthermore, it also includes:

[0019] The key bar is fixedly installed on the outer surface of the guide post;

[0020] A keyway is formed on the second cone, and the keyway is configured to communicate with the inner hole of the second cone.

[0021] Furthermore, it also includes:

[0022] A positioning step is located between the clamping shaft and the first cone;

[0023] One end face of the thin-walled blank abuts against the end face of the positioning step.

[0024] Furthermore, it also includes:

[0025] The fixing cover has a concave cross-section, and the fixing cover is spirally mounted on the threaded post and covers the drive nut inside;

[0026] The end face of the fixed cover abuts against the other end face of the thin-walled blank.

[0027] Furthermore, the hardness of the clamping shaft is HRC50 or higher.

[0028] The beneficial effects of this utility model are as follows:

[0029] 1. By utilizing the contact between the expansion sleeve and the thin-walled blank, the milling cutter only acts on the expansion sleeve during machining, and the core components such as the clamping shaft and the cone are not damaged. The expansion sleeve, as a consumable part, can be replaced separately, which significantly improves the reusability of tooling fixtures.

[0030] 2. The clearance section can specifically avoid the machining depth of the milling cutter. When the milling cutter mills a little deeper, the end of the milling cutter will enter the gap area between the clearance section and the thin-walled blank. This ensures that the milling cutter will not damage the expansion sleeve during machining, thereby avoiding repeated replacement of the expansion sleeve and reducing the replacement frequency and cost.

[0031] 3. The second cone is driven by the engagement of a threaded post and a drive nut, which facilitates the movement of the second cone and thus radially expands the expansion sleeve. At the same time, the threaded engagement has a certain degree of self-locking, which can prevent the expansion sleeve from being released from its tightness.

[0032] 4. The key bar and keyway work together to restrict the rotation of the second cone on the guide post, so that the second cone can only move left and right along the guide post, avoiding deflection between the second cone and the guide post, thus making the overall machining more stable.

[0033] 5. The positioning step can quickly position the thin-walled blank, ensuring consistency in each clamping and reducing adjustment time during the clamping process.

[0034] 6. The fixing cover provides axial compression for the thin-walled blank and houses the drive nut inside, preventing chips generated during processing from entering the mating surface between the drive nut and the threaded column. This extends the service life of the entire component and prevents workpiece displacement due to vibration during processing, ensuring processing stability.

[0035] 7. The clamping shaft has high wear resistance and deformation resistance, and can adapt to frequent clamping with machine tool chucks, thus extending the overall service life of the tooling fixture. Attached Figure Description

[0036] Appendix Figure 1 This is a structural diagram of the present invention;

[0037] Appendix Figure 2 This is a cross-sectional view of the present invention;

[0038] Appendix Figure 3 This is an exploded view of the present invention;

[0039] Appendix Figure 4 For the appendix Figure 3 Enlarged diagram of A in the middle;

[0040] Appendix Figure 5 This is a model of a four-axis workpiece used in teaching in the background art;

[0041] Appendix Figure 6 The tooling and fixtures used in the background technology;

[0042] Explanation of reference numerals in the attached drawings: 1. Thin-walled blank, 2. Clamping shaft, 3. First cone, 4. Guide post, 5. Second cone, 6. Expansion sleeve, 7. Expansion section, 8. Clearance section, 9. Threaded post, 10. Drive nut, 11. Key bar, 12. Keyway, 13. Positioning step, 14. Fixing cover. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In the description of this application, it should be noted that the terminology used herein is only for describing specific implementations and is not intended to limit the exemplary implementations according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings indicate similar items, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0044] Example 1:

[0045] This embodiment provides a tooling fixture for four-axis machine tool processing, including a thin-walled blank 1, and further comprising:

[0046] Clamping shaft 2 is used for clamping with the machine tool chuck;

[0047] The first cone 3 is fixedly disposed on the right side of the clamping shaft 2, with the large end of the first cone 3 close to the clamping shaft 2;

[0048] The guide post 4 is fixedly installed at the right end of the first cone 3;

[0049] The second cone 5 is movably mounted on the guide post 4, with its large end positioned away from the clamping shaft 2.

[0050] An expansion sleeve 6 is fitted onto the first cone 3 and the second cone 5. When the second cone 5 moves to the left, the expansion sleeve 6 will expand radially.

[0051] A drive assembly for driving the second cone 5 to move to the left;

[0052] The thin-walled blank 1 is fitted onto the expansion sleeve 6.

[0053] In this technical solution, in actual use, the clamping shaft 2 is used to clamp with the three-jaw chuck or four-axis chuck of a four-axis machine tool (three-jaw chuck and four-jaw chuck are existing technologies and will not be described in detail here). The jaws of the chuck can be covered with copper foil to prevent damage to the outer surface of the clamping shaft 2.

[0054] When it is necessary to clamp the thin-walled blank 1, first put the expansion sleeve 6 on the first cone 3, then put the second cone 5 on the guide post 4, then put the thin-walled blank 1 on the expansion sleeve 6, and then drive the second cone 5 to move to the left through the drive assembly, so that the expansion sleeve 6 expands radially, thereby tightening and fixing the thin-walled blank 1, and then the machine tool program can be started to process the blank.

[0055] When the milling cutter mills down to a greater depth, it will mill onto the expansion sleeve 6 without damaging the core components such as the clamping shaft 2 and the first cone 3. This means that the main body does not need to be replaced; only the expansion sleeve 6 needs to be replaced for reuse.

[0056] This design avoids the waste associated with traditional single-use fixtures, making it particularly suitable for the frequent hands-on needs in teaching settings. Furthermore, through the cooperation of the first cone 3, the second cone 5, and the expansion sleeve 6, the leftward movement of the second cone 5 drives the expansion sleeve 6 to expand radially and uniformly, achieving flexible tightening of the thin-walled blank 1. This reduces the deformation of the thin-walled workpiece during clamping and ensures machining accuracy.

[0057] With this structural design, the expansion sleeve 6 contacts the thin-walled blank 1, and the milling cutter only acts on the expansion sleeve 6 during machining. Core components such as the clamping shaft 2 and the cone are not damaged. The expansion sleeve 6 is a consumable part that can be replaced separately, which significantly improves the reusability of tooling fixtures.

[0058] Example 2:

[0059] This embodiment provides a tooling fixture for four-axis machine tool processing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0060] Furthermore, the outer circle of the expansion sleeve 6 is divided into two expansion sections 7 for contacting the inner wall of the thin-walled blank 1 and a clearance section 8 located between the two expansion sections 7. The outer diameter of the clearance section 8 is smaller than that of the expansion section 7, and it is used to avoid the milling cutter.

[0061] In this technical solution, since the outer diameter of the clearance section 8 is smaller than that of the expansion section 7, there is a gap between the outer surface of the clearance section 8 and the inner wall of the thin-walled blank 1. When the milling cutter mills a little more depth, the end of the milling cutter will enter the gap area between the clearance section 8 and the thin-walled blank 1, so that the milling cutter will basically not damage the expansion sleeve 6 during processing, thereby avoiding repeated replacement of the expansion sleeve 6, reducing processing costs and resource waste.

[0062] Through this structural design, the clearance section 8 can specifically avoid the machining depth of the milling cutter. When the milling cutter mills a little more depth, the end of the milling cutter will enter the gap area between the clearance section 8 and the thin-walled blank 1, so that the milling cutter will basically not damage the expansion sleeve 6 during machining, thereby avoiding repeated replacement of the expansion sleeve 6 and reducing the replacement frequency and cost.

[0063] Example 3:

[0064] This embodiment provides a tooling fixture for four-axis machine tool processing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0065] Furthermore, the driving component includes:

[0066] Threaded post 9 is fixedly installed on the right end face of guide post 4;

[0067] The drive nut 10 has its helix set on the threaded post 9;

[0068] The end face of the drive nut 10 abuts against the large end face of the second cone 5.

[0069] In this technical solution, when it is necessary to drive the second cone 5 to move to the left, simply turn the drive nut 10 to make it spiral to the left on the threaded post 9, thereby pushing the second cone 5 to move to the left. The operation is simple and convenient.

[0070] Through this structural design, the second cone 5 is driven by the cooperation of the threaded column 9 and the drive nut 10, which facilitates the movement of the second cone 5 and thus radially expands the expansion sleeve 6. At the same time, the threaded cooperation has a certain self-locking property, which can prevent the expansion sleeve 6 from being released from the expansion.

[0071] Example 4:

[0072] This embodiment provides a tooling fixture for four-axis machine tool processing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0073] Furthermore, it also includes:

[0074] Key bar 11 is fixedly mounted on the outer surface of guide post 4;

[0075] A keyway 12 is formed on the second cone 5, and the keyway 12 is configured to penetrate the inner hole of the second cone 5.

[0076] In this technical solution, the key bar 11 and the keyway 12 cooperate to restrict the rotation of the second cone 5 on the guide post 4, so that the second cone 5 can only move left and right along the guide post 4, avoiding deflection between the second cone 5 and the guide post 4, thereby making the overall processing more stable.

[0077] Example 5:

[0078] This embodiment provides a tooling fixture for four-axis machine tool processing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0079] Furthermore, it also includes:

[0080] Positioning step 13 is located between clamping shaft 2 and first cone 3;

[0081] One end face of the thin-walled blank 1 abuts against the end face of the positioning step 13.

[0082] In this technical solution, when the thin-walled blank 1 is fitted onto the expansion sleeve 6, one end face of the thin-walled blank 1 abuts against the end face of the positioning step 13, thus completing the positioning of the thin-walled blank 1.

[0083] Through this structural design, the positioning step 13 can quickly position the thin-walled blank 1, ensuring consistency in each clamping and reducing adjustment time during the clamping process.

[0084] Example 6:

[0085] This embodiment provides a tooling fixture for four-axis machine tool processing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0086] Furthermore, it also includes:

[0087] The fixing cover 14 has a concave cross-section. The fixing cover 14 is spirally mounted on the threaded post 9 and covers the drive nut 10 inside.

[0088] The end face of the fixed cover 14 abuts against the other end face of the thin-walled blank 1.

[0089] In this technical solution, the fixing cover 14 is spirally installed on the threaded column 9, and its end face abuts against the other end face of the thin-walled blank 1, which plays an axial pressing role on the thin-walled blank 1. At the same time, the drive nut 10 is covered inside to prevent the chips generated during the processing from entering the mating surface between the drive nut 10 and the threaded column 9, thus extending the service life of the overall component.

[0090] Through this structural design, the fixed cover 14 plays an axial pressing role on the thin-walled blank 1, while covering the drive nut 10 inside, preventing the chips generated during the processing from entering the mating surface between the drive nut 10 and the threaded column 9, extending the service life of the overall component, and also avoiding the displacement of the workpiece due to vibration during the processing, thus ensuring the stability of the processing.

[0091] Example 7:

[0092] This embodiment provides a tooling fixture for four-axis machine tool processing, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0093] Furthermore, the hardness of the clamping shaft 2 is HRC50 or higher.

[0094] In this technical solution, the material of the clamping shaft 2 can be a material with a hardness of HRC50 or higher. Since the clamping shaft 2 needs to be clamped frequently with the machine tool chuck, the higher hardness enables it to withstand the friction and compression of the jaws, making it less prone to deformation and damage. In addition, copper foil can be wrapped around the jaws to prevent the jaws from damaging the outer surface of the clamping shaft 2.

[0095] Through this structural design, the clamping shaft 2 has high wear resistance and deformation resistance, and can adapt to frequent clamping with machine tool chucks, thus extending the overall service life of the tooling fixture.

[0096] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features described in this application specification can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A tooling fixture for four-axis machine tool processing, comprising a thin-walled blank (1), characterized in that, Also includes: Clamping shaft (2), which is used to clamp with the machine tool chuck; The first cone (3) is fixedly disposed on the right side of the clamping shaft (2), with the large end of the first cone (3) close to the clamping shaft (2); The guide post (4) is fixedly installed at the right end of the first cone (3); The second cone (5) is moved left and right on the guide post (4), and the large end of the second cone (5) is far away from the clamping shaft (2); An expansion sleeve (6) is fitted onto the first cone (3) and the second cone (5). When the second cone (5) moves to the left, the expansion sleeve (6) will expand radially. A drive assembly for driving the second cone (5) to move to the left; The thin-walled blank (1) is fitted onto the expansion sleeve (6).

2. The tooling fixture for four-axis machine tool processing according to claim 1, characterized in that: The outer circle of the expansion sleeve (6) is divided into two expansion sections (7) for contacting the inner wall of the thin-walled blank (1) and a clearance section (8) located between the two expansion sections (7). The outer diameter of the clearance section (8) is smaller than that of the expansion section (7), and it is used to avoid the milling cutter.

3. A tooling fixture for four-axis machine tool processing according to claim 2, characterized in that, The driving component includes: A threaded post (9) is fixedly mounted on the right end face of the guide post (4); Drive nut (10), the helix of which is set on threaded post (9); The end face of the drive nut (10) abuts against the large end face of the second cone (5).

4. A tooling fixture for four-axis machine tool processing according to claim 3, characterized in that, Also includes: Key bar (11), which is fixedly installed on the outer surface of guide post (4); A keyway (12) is formed on the second cone (5), and the keyway (12) is connected to the inner hole of the second cone (5).

5. A tooling fixture for four-axis machine tool processing according to claim 4, characterized in that, Also includes: Positioning step (13), which is located between clamping shaft (2) and first cone (3); One end face of the thin-walled blank (1) abuts against the end face of the positioning step (13).

6. A tooling fixture for four-axis machine tool processing according to claim 5, characterized in that, Also includes: The fixed cover (14) has a concave cross-section. The fixed cover (14) is spirally mounted on the threaded post (9) and covers the drive nut (10) inside. The end face of the fixed cover (14) abuts against the other end face of the thin-walled blank (1).

7. A tooling fixture for four-axis machine tool processing according to claim 6, characterized in that: The hardness of the clamping shaft (2) is HRC50 or higher.

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