A machining center single-piece valve stem tooling clamp

Abstract

The utility model provides a kind of machining center single piece valve stem tooling fixture, including connecting disc, connecting disc is circularly arranged, is installed on the four-axis of machining center;Bottom plate is installed on the side surface of connecting disc away from machining center;Tooling base and tooling pressing plate are oppositely arranged, are connected by connecting bolt between the two, and space that is formed between the two contains workpiece, the inner wall of space and the shape of the outer side wall of workpiece are oppositely arranged.The utility model is fixed in machining center four-axis by connecting disc and bottom plate tooling base and tooling pressing plate, and the direction is correct by using foolproof recess, workpiece is put into space, and tooling pressing plate is fastened by bolt through pressing plate connecting groove and tooling base connecting hole, and the clamping of workpiece is more closely and completely adhered, effectively reduces bruise, and multi-angle machining can be realized by four-axis rotation in machining process, and the annular connecting disc design of fixture can effectively disperse cutting force, in addition, it can also be applicable to clamping oval tooling.

Description

Technical Field

[0001] This utility model relates to the field of machining centers, and in particular to the field of ring-shaped part clamping technology, specifically a single valve stem tooling fixture for machining centers. Background Technology

[0002] In the field of machining, the clamping efficiency of round workpieces such as shafts and discs directly affects the operational efficiency of machining centers. Traditional clamping methods generally use three-jaw chucks or special fixtures, which have the following technical drawbacks:

[0003] (1) The clamping range of the three-jaw chuck needs to be manually adjusted. The positioning accuracy is affected by the operator's experience, and the repeatability error is often ±0.05mm.

[0004] (2) Existing special fixtures are mostly designed for a single size. When the diameter of the workpiece changes, the entire fixture needs to be replaced, which takes an average of 15-30 minutes, especially for changes in the shape of a circle or an ellipse.

[0005] (3) Although hydraulic / pneumatic clamps can achieve fast clamping, the system is complex and the cost increases by 3-5 times. Especially for batch processing of workpieces of different diameters, such as automobile wheel hub processing lines, existing technologies cannot balance clamping speed and positioning accuracy. Summary of the Invention

[0006] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a single-piece valve stem tooling fixture for machining centers to solve the difficulties of the prior art.

[0007] To achieve the above and other related objectives, this utility model provides a single-piece valve stem tooling fixture for a machining center, comprising:

[0008] Connecting disk 1, which is circular in shape and has one side mounted on the four axes of the machining center;

[0009] Base plate 2, which is installed on the side of the connecting plate 1 away from the machining center;

[0010] The tooling base 3 and the tooling pressure plate 4 are arranged opposite to each other and connected by a connecting bolt 5. They form a space 7 between them to accommodate the workpiece 6. The inner wall of the space 7 is arranged opposite to the outer wall of the workpiece 6.

[0011] According to the preferred embodiment, the connecting plate 1 is arranged in a ring shape, and a central shaft through hole 8 is opened on the central axis for mounting to the rotary shaft of the machining center. Connecting through holes 9 are arranged around the central shaft through hole 8.

[0012] The connecting plate 1 has a base plate connecting bolt groove 10 for connecting to the base plate 2 on the side near the base plate 2.

[0013] According to the preferred embodiment, the base plate connecting bolt grooves 10 are distributed in an array at equal intervals on the connecting plate 1.

[0014] According to the preferred embodiment, the base plate 2 is configured as a square structure and has tooling base mounting holes 11 for connecting the tooling base 3. There are multiple tooling base mounting holes 11, and the multiple tooling base mounting holes 11 are connected to form a vertical straight line structure.

[0015] According to the preferred embodiment, the base plate 2 is provided with rounded corners 12 around its perimeter, and the outer diameter of the base plate 2 is smaller than the outer diameter of the connecting plate 1.

[0016] According to the preferred embodiment, the tooling base 3 is provided with a base plate connecting groove 13 on the side close to the base plate 2 corresponding to the tooling base mounting hole 11, and a pressure plate connecting groove 14 is provided on the side away from the base plate 2 corresponding to the tooling pressure plate 4.

[0017] The tooling plate 4 is provided with a tooling base connection hole 15;

[0018] During installation, the tooling base 3 and the tooling pressure plate 4 are connected and secured by bolts passing through the pressure plate connecting groove 14 and the tooling base connecting hole 15.

[0019] According to the preferred embodiment, a pair of pressure plate connecting grooves 14 and tooling base connecting holes 15 are symmetrically arranged, with a space 7 in the middle for accommodating the workpiece 6.

[0020] According to the preferred embodiment, both the tooling base 3 and the tooling pressure plate 4 are provided with recessed anti-foolproof grooves 16 on the same side.

[0021] According to the preferred embodiment, the inner diameter of the space 7 formed by the tooling base 3 and the tooling pressure plate 4 for accommodating the workpiece 6 is smaller than the outer diameter of the workpiece 6 base.

[0022] According to the preferred embodiment, the inner diameter of the space 7 formed by the tooling base 3 and the tooling pressure plate 4 for accommodating the workpiece 6 is the same as the outer diameter of the workpiece 6.

[0023] This invention uses a connecting plate and a base plate to fix the tooling base and tooling pressure plate on the four axes of the machining center. It also uses a foolproof groove to ensure correct orientation. After the workpiece is placed in the space between the tooling base and the tooling pressure plate, the tooling pressure plate is fastened by bolts passing through the pressure plate connecting groove and the tooling base connecting hole, making the clamping of the workpiece more tight. At this time, the inner wall of the space will be completely in contact with the outer wall of the valve stem, effectively reducing pressure damage. During the machining process, multi-angle machining can be achieved by rotating the four axes. The ring connecting plate design of the fixture can effectively disperse the cutting force. In addition, it can also be used to clamp elliptical tooling.

[0024] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings, so as to facilitate an understanding of the features and advantages of the present invention. Attached Figure Description

[0025] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model;

[0026] Figure 2 This is a schematic diagram showing the usage status of this utility model;

[0027] Figure 3 The diagram shown is an enlarged three-dimensional structural schematic of the connecting disc in this utility model.

[0028] Figure 4 The diagram shown is an enlarged three-dimensional structural schematic of the base plate in this utility model.

[0029] Figure 5 The diagram shown is an enlarged three-dimensional structural schematic of the tooling base in this utility model;

[0030] Figure 6 This is a magnified three-dimensional structural diagram of the tooling base from another perspective in this utility model;

[0031] Figure 7 The diagram shown is an enlarged three-dimensional structural diagram of the tooling pressure plate in this utility model.

[0032] Label Explanation

[0033] 1. Connecting plate; 2. Base plate; 3. Tooling base; 4. Tooling pressure plate; 5. Connecting bolt; 6. Workpiece; 7. Space; 8. Central shaft through hole; 9. Connecting through hole; 10. Base plate connecting bolt groove; 11. Tooling base mounting hole; 12. Rounded corner; 13. Base plate connecting groove; 14. Pressure plate connecting groove; 15. Tooling base connecting hole; 16. Anti-foolproof groove. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages 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. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0035] Compared to the embodiments shown in the accompanying drawings, feasible embodiments within the scope of protection of this utility model may have fewer components, have other components not shown in the drawings, different components, components arranged differently, or components with different connections, etc. Furthermore, two or more components shown in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0036] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms “first,” “second,” and similar terms used in this patent application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, “an” or “a” and similar terms do not necessarily indicate a quantity limitation. Terms such as “comprising” or “including” mean that the element or object preceding the word encompasses the element or object listed following the word and its equivalents, without excluding other elements or objects. Terms such as “connected” or “linked” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as “upper,” “lower,” “left,” and “right” are used only to indicate relative positional relationships; these relative positional relationships may change accordingly when the absolute position of the described object changes.

[0037] This utility model proposes a single-piece valve stem tooling fixture for machining centers, used in the process of clamping ring-shaped parts. This utility model does not limit the type of product, but the structure of this single-piece valve stem tooling fixture for machining centers is particularly suitable for the needs of machining centers that require clamping products.

[0038] In general, the machining center single-piece valve stem tooling fixture proposed in this utility model mainly includes a connecting plate 1, a base plate 2, a tooling base 3, and a tooling pressure plate 4. See also... Figure 1 It shows the arrangement of the connecting plate 1, the base plate 2, the tooling base 3 and the tooling pressure plate 4.

[0039] To achieve rapid and accurate installation of ring-shaped parts in machining centers, this paper addresses the following technical shortcomings of traditional clamping methods that commonly use three-jaw chucks or dedicated fixtures: Three-jaw chucks require manual adjustment of the clamping range, and their positioning accuracy is affected by operator experience, with repeatability errors often reaching ±0.05mm; existing dedicated fixtures are mostly single-size designs, requiring replacement of the entire fixture set when the workpiece diameter changes, with an average replacement time of 15-30 minutes, especially for changes in circular and elliptical shapes; while hydraulic / pneumatic fixtures can achieve rapid clamping, their high system complexity and 3-5 times increased cost are particularly problematic for scenarios involving batch processing of workpieces of varying diameters, such as automotive wheel hub machining lines. Existing technologies struggle to balance clamping speed and positioning accuracy. To address this, the technical solution provided in this embodiment uses a connecting plate 1 and a base plate 2 to fix the tooling base 3 and tooling pressure plate 4 onto the four axes of the machining center. A foolproof groove ensures correct orientation. After the workpiece is placed into the space between the tooling base 3 and tooling pressure plate 4, bolts are used to pass through the pressure plate connecting groove and the tooling base connecting hole to secure the tooling pressure plate 4, resulting in tighter clamping of the workpiece. At this point, the inner wall of the space completely fits against the outer wall of the valve stem, effectively reducing pressure damage. During machining, multi-angle machining can be achieved through four-axis rotation. The annular connecting plate design of the fixture effectively disperses cutting forces and is also suitable for clamping elliptical tooling.

[0040] Specifically, the connecting plate 1 is arranged in a ring shape. The ring contour can effectively disperse the cutting force during the machining process, avoid local stress concentration, and extend the service life of the fixture. A central shaft through hole 8 is opened on the central axis to be installed with the rotary axis of the machining center. The central shaft through hole 8 directly connects with the rotary axis of the machining center, ensuring that the fixture axis is strictly coaxial with the four axes of the machining center and reducing clamping errors. In addition, there are connecting through holes 9 around the central shaft through hole 8. The through hole layout of multiple connecting through holes 9 supports flexible installation of different machining centers and meets the processing requirements of valve stems of various specifications. Secondly, a base plate connecting bolt groove 10 is opened on the side of the connecting plate 1 near the base plate 2 to connect with the base plate 2. Multiple base plate connecting bolt grooves 10 are evenly distributed in an array on the connecting plate 1, providing enough connecting units for the next step of installing the base plate 2 for stable connection.

[0041] Next, the base plate 2 is bolted to the base plate connecting bolt groove 10, and then connected to the side of the connecting plate 1 away from the machining center. The base plate 2 is set in a square structure, which is easier to align than a circle. In addition, there are multiple tooling base mounting holes 11 corresponding to the tooling base 3. The multiple tooling base mounting holes 11 are connected to form a vertical straight line structure. The vertical distribution of multiple holes ensures that the bolt tightening force is evenly transmitted, and avoids the tooling base 3 from being skewed during processing. In addition, the base plate 2 is provided with rounded corners 12 around its perimeter. The outer diameter of the base plate 2 is smaller than the outer diameter of the connecting plate 1, which facilitates alignment and also prevents the base plate 2 from protruding from the connecting plate 1, forming a good match.

[0042] It should be specifically noted that the tooling base 3 and the tooling pressure plate 4 are arranged opposite each other and connected by a connecting bolt 5, forming a space 7 between them to accommodate the workpiece 6. The inner wall of the space 7 is shaped opposite to the outer wall of the workpiece 6. To ensure a stable connection, on the one hand, the tooling base 3 is provided with a base plate connecting groove 13 corresponding to the tooling base mounting hole 11 on the side close to the base plate 2, which facilitates the bolts to be inserted from the side of the base plate 2 and locked onto the tooling base 3. On the other hand, to ensure the stable placement of the workpiece and form an adaptive fit support, the tooling base 3 is provided with a pressure plate connecting groove 14 corresponding to the tooling pressure plate 4 on the side away from the base plate 2. The tooling pressure plate 4 is provided with a tooling base connecting hole 15. During installation, the tooling base 3 and the tooling pressure plate 4 are connected and tightened by bolts passing through the pressure plate connecting groove 14 and the tooling base connecting hole 15. At this time, the inner wall of the space will be completely fitted with the outer wall of the valve stem, effectively reducing pressure damage and also accommodating the installation of elliptical workpieces with arc-shaped ends and a rectangular middle. With the above structure, a pair of pressure plate connecting grooves 14 and tooling base connecting holes 15 are symmetrically arranged, and a space 7 for accommodating workpiece 6 is provided in the middle. During the processing, multi-angle processing can be achieved through four-axis rotation. The ring connecting plate design of the fixture can effectively disperse the cutting force 15.

[0043] After processing is completed, the workpiece can be disassembled by reversing the operation. The anti-fooling groove can prevent incorrect clamping direction during disassembly. The same side of the tooling base 3 and the tooling pressure plate 4 are provided with recessed anti-fooling grooves 16. Similarly, the inner diameter of the space 7 formed by the tooling base 3 and the tooling pressure plate 4 to accommodate the workpiece 6 is smaller than the outer diameter of the workpiece 6 base. The inner diameter of the space 7 formed by the tooling base 3 and the tooling pressure plate 4 to accommodate the workpiece 6 is the same as the outer diameter of the workpiece 6, which can play the role of installation limit and achieve the effect of quick installation.

[0044] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A single-piece valve stem tooling fixture for a machining center, characterized in that, include: Connecting disk (1), the connecting disk (1) is circular and one side is mounted on the four axes of the machining center; The base plate (2) is mounted on the side of the connecting plate (1) away from the machining center; The tooling base (3) and the tooling pressure plate (4) are arranged opposite to each other and connected by a connecting bolt (5), forming a space (7) between them to accommodate the workpiece (6). The inner wall of the space (7) is arranged opposite to the outer wall of the workpiece (6).

2. The machining center single-piece valve stem tooling fixture according to claim 1, characterized in that, The connecting plate (1) is arranged in a ring shape, and a central shaft through hole (8) for mounting to the rotating shaft of the machining center is opened on the central axis. Connecting through holes (9) are arranged around the central shaft through hole (8). The connecting plate (1) has a bottom plate connecting bolt groove (10) on the side near the bottom plate (2) for connecting with the bottom plate (2).

3. The machining center single-piece valve stem tooling fixture according to claim 2, characterized in that, The base plate (2) is configured as a square structure and has a tooling base mounting hole (11) for connecting the tooling base (3). The tooling base mounting hole (11) is provided in multiple ways and the multiple tooling base mounting holes (11) are connected to form a vertical straight line structure.

4. The machining center single-piece valve stem tooling fixture according to claim 3, characterized in that, The base plate (2) has rounded corners (12) around its perimeter, and the outer diameter of the base plate (2) is smaller than the outer diameter of the connecting plate (1).

5. The machining center single-piece valve stem tooling fixture according to claim 4, characterized in that, The tooling base (3) has a base plate connecting groove (13) on the side close to the base plate (2) corresponding to the tooling base mounting hole (11), and a pressure plate connecting groove (14) is opened on the side away from the base plate (2) corresponding to the tooling pressure plate (4). The tooling plate (4) is provided with a tooling base connection hole (15); During installation, the tooling base (3) and the tooling pressure plate (4) are connected and secured by bolts passing through the pressure plate connecting groove (14) and the tooling base connecting hole (15).

6. The machining center single-piece valve stem tooling fixture according to claim 5, characterized in that, The tooling base (3) and the tooling pressure plate (4) are both provided with recessed anti-fooling grooves (16) on the same side.

7. The machining center single-piece valve stem tooling fixture according to claim 6, characterized in that, The inner diameter of the space (7) formed by the tooling base (3) and the tooling pressure plate (4) for accommodating the workpiece (6) is smaller than the outer diameter of the workpiece (6) base.

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