High-precision open type lathe tool for machining caliper body cylinder hole

Abstract

The utility model relates to the field of automobile part manufacturing, in particular to a high-precision open type lathe tool for machining a caliper body cylinder hole, which comprises a positioning plate, an expansion core cylindrical pin, a positioning diamond pin, a connecting plate, an automatic alignment base and a self-adaptive balancing weight. The connecting plate is connected between the positioning plate and the automatic alignment base, the side, close to the automatic alignment base, of the positioning plate is connected with the expansion core cylindrical pin and the positioning diamond pin, and the side, close to the positioning plate, of the automatic alignment base is detachably connected with the self-adaptive balancing weight. A placing hole is formed in the positioning plate, a machining hole is formed in the positioning plate, the expansion core cylindrical pin comprises a mounting column and an expansion core, and a cross-shaped notch is formed in the expansion core. A flange plate connector is formed in the side, away from the positioning plate, of the automatic alignment base. The lathe tool solves the problem that an existing lathe tool for machining the caliper cylinder hole in a closed mode is poor in flexibility.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts manufacturing, and in particular to a lathe tooling for high-precision open machining of caliper body cylinder bores. Background Technology

[0002] In the machining of caliper body cylinder bores, the caliper needs to be mounted on a fixture before machining on a lathe. Existing lathe fixtures for caliper body cylinder bores are enclosed, and a major drawback of enclosed fixtures is their limited flexibility. Enclosed fixtures are typically designed for specific workpiece types, meaning that when machining workpieces of different specifications, the entire fixture system may need to be redesigned or replaced. This design increases production costs and setup time, especially when frequent caliper changes are required. Furthermore, due to the lack of adjustability, enclosed fixtures are inadequate for situations requiring fine-tuning of machining parameters, thus impacting production efficiency and product quality. Moreover, existing fixtures are not highly precise; low-precision fixtures can lead to inconsistent product dimensions, resulting in significant differences between individual products within a batch, affecting the uniformity and interchangeability of the final product, extending the production cycle time, and reducing production efficiency.

[0003] To solve the above-mentioned technical problems, this utility model presents a lathe fixture for high-precision open machining of caliper body cylinder bores. Utility Model Content

[0004] This utility model provides a high-precision open lathe fixture for machining caliper cylinder bores, aiming to solve the problem of poor flexibility of existing closed lathe fixtures for machining caliper cylinder bores. The technical solution is as follows:

[0005] A high-precision open-type lathe fixture for machining caliper cylinder bores includes a positioning plate, an expanding cylindrical pin, a positioning diamond pin, a connecting plate, an automatic alignment base, and an adaptive counterweight. The positioning plate and the automatic alignment base are arranged in parallel, and the connecting plate connects the positioning plate and the automatic alignment base. The expanding cylindrical pin and the positioning diamond pin are connected to the side of the positioning plate near the automatic alignment base, and the adaptive counterweight is detachably connected to the side of the automatic alignment base near the positioning plate. The positioning plate has placement holes and machining holes. The expanding cylindrical pin includes a mounting post and an expanding core, and a cross-shaped notch is formed on the expanding core.

[0006] Based on the above technical solution, mounting holes are provided on the positioning plate.

[0007] Based on the above technical solution, the connecting plate is provided with lifting holes.

[0008] Furthermore, a flange connection port is provided on the side of the automatic alignment base away from the positioning plate.

[0009] Beneficial effects

[0010] Compared with existing technologies, the advantages of this utility model are as follows: Firstly, the open and modular design allows the tooling to adapt to various caliper bodies, increasing the flexibility and versatility of tooling use. Secondly, the ingeniously designed tooling structure effectively reduces geometric and positional errors in the machining of the caliper body cylinder bore, ensuring high-precision machining requirements are met. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other embodiments can be derived from the provided drawings without creative effort.

[0012] Figure 1 : A schematic diagram of the structure of this utility model;

[0013] Figure 2 : A schematic diagram of the structure of the automatic alignment base described in this utility model;

[0014] Figure 3 : A schematic diagram showing the positions of the expanding cylindrical pin and the positioning rhomboid pin described in this utility model;

[0015] Figure 4 : A schematic diagram of the structure of the expanding core cylindrical pin described in this utility model;

[0016] Figure 5 : Installation diagram of the clamping device of this utility model;

[0017] Figure 6 Top view of the mounting caliper of this utility model. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and examples:

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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.

[0022] like Figure 1 and Figure 2 As shown, a lathe fixture for high-precision open machining of caliper body cylinder bores includes a positioning plate 1, an expansion core cylindrical pin 2, a positioning diamond pin 3, a connecting plate 4, an automatic alignment base 5, and an adaptive counterweight block 6. The positioning plate 1 and the automatic alignment base 5 are arranged in parallel, and the connecting plate 4 is connected between the positioning plate 1 and the automatic alignment base 5.

[0023] like Figure 3 and Figure 4 As shown, the positioning plate 1 is bolted to the side of the automatic alignment base 5 with an expansion core cylindrical pin 2 and a positioning diamond pin 3. The automatic alignment base 5 is detachably connected to the side of the positioning plate 1 with an adaptive counterweight block 6. The positioning plate 1 has a placement hole 13 and a machining hole 12. The expansion core cylindrical pin 2 includes a mounting post 21 and an expansion core 22. The expansion core 22 has a cross cut 23.

[0024] Mounting holes 11 are provided on the positioning plate 1. A flange connection port 51 is provided on the side of the automatic alignment base 5 away from the positioning plate 1. The mounting holes 11 are used to fix the tooling on the lathe, and the machining holes 12 are aligned with the position of the caliper body cylinder bore. The flange connection port 51 is connected to the lathe base.

[0025] The connecting plate 4 has lifting holes 41. The connecting plate 4 provides the connection for the entire tooling, ensuring a gapless and precise fit between the positioning plate 1 and the automatic alignment base 5. The lifting holes 41 facilitate lifting during tooling changes; lifting straps can be passed through the holes for easy lifting and replacement. The main advantage of the lifting holes 41 on the connecting plate is the ease of lifting and replacing the tooling. When it is necessary to move or replace the entire lathe tooling, the existence of the lifting holes allows operators to easily lift the tooling by passing lifting straps through these holes, greatly simplifying the tooling change process and improving work efficiency. Furthermore, the design of the lifting holes 41 also helps to reduce the overall weight of the tooling, as weight reduction can be achieved by removing some material while maintaining structural strength, making the tooling easier to handle and install.

[0026] The expansion core 22 is made of Cr12MoV and then tempered and quenched. Cr12MoV is a high-quality alloy tool steel. After appropriate heat treatment, such as tempering and quenching, it can obtain good hardness and toughness, thus giving the expansion core high strength and excellent wear resistance, and enabling it to maintain its shape and dimensional stability during long-term use.

[0027] like Figure 5 and Figure 6 As shown, during use, the entire fixture is connected to the lathe spindle, and the automatic alignment base 5 is connected to the spindle for automatic alignment. The rotation center of the fixture is coaxial with the rotation center of the machine spindle.

[0028] The first lug 71 of the caliper body is fitted onto the positioning diamond pin 3 for positioning. The second lug 72 is fitted onto the expanding cylindrical pin 2. Due to metal stress, during the caliper insertion process, the top chamfer and cross cut 23 will extend and expand outwards, fitting into the lug hole. The cylindrical pin 2 provides support by contacting the inner wall of the lug hole around its perimeter.

[0029] The cylinder bore surface is attached to the reference surface of the positioning plate 1. The hydraulic cylinder extends and tightens the positioning caliper body. According to the weight of different specifications of calipers 7, different weight adaptive counterweights 6 are installed to automatically balance the overall dynamic balance and ensure the stability of the equipment during the processing.

[0030] The open-design positioning plate 1 facilitates quick replacement and adjustment of caliper bodies of different sizes, offering high flexibility and adaptability to diverse product needs. The expanding cylindrical pin 2 and the positioning diamond pin 3 secure the caliper and enable automatic alignment. It is important to note that the positions of the caliper lug holes must be consistent across different caliper body sizes. If the position of the caliper lug holes changes, the corresponding positions must be moved before bolting the expanding cylindrical pin 2 and the positioning diamond pin 3 together.

[0031] When using a lathe fixture for high-precision open-machining of caliper body cylinder bores, the automatic alignment base 5 is connected to the lathe spindle and can automatically align itself, ensuring that the rotation center of the fixture is coaxial with the rotation center of the lathe spindle. In this way, regardless of whether the fixture itself is perfectly aligned, the automatic alignment base ensures that the fixture is in the correct angular position before machining begins.

[0032] Furthermore, in actual use, the two lug holes of the caliper body are positioned by a positioning diamond pin and an expanding cylindrical pin, respectively. When the caliper body is placed on the fixture, the first lug hole 71 is positioned by the positioning diamond pin 3, while the second lug hole 72 is fixed by the expanding cylindrical pin 2 with a cross-cut. This cross-cut design allows the expanding core 22 to expand slightly during assembly to accommodate the size differences of the caliper body lug holes, thereby achieving an automatic alignment effect. During caliper insertion, due to the stress of the metal, the cross-cut expands outward with the help of the top chamfer, allowing the expanding cylindrical pin 2 to smoothly enter the lug hole and make tight contact with the hole wall, thereby achieving stable support and precise positioning.

[0033] Significantly improves machining accuracy: Through the ingeniously designed tooling structure, the geometric dimensional and positional errors of the caliper body cylinder bore machining are effectively reduced, ensuring that high-precision machining requirements are met.

[0034] Improved production efficiency: The rapid positioning system shortens clamping and adjustment time, speeds up the production pace, and improves overall manufacturing efficiency.

[0035] Enhanced applicability: The open and modular design allows the tooling to be adapted to various caliper bodies, increasing the flexibility and versatility of the tooling.

[0036] The present invention has been described above by way of example, but the present invention is not limited to the specific embodiments described above. Any modifications or variations made based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A lathe fixture for high-precision open-type machining of caliper body cylinder bores, characterized in that: The system includes a positioning plate (1), an expansion core cylindrical pin (2), a positioning diamond pin (3), a connecting plate (4), an automatic alignment base (5), and an adaptive counterweight (6). The positioning plate (1) and the automatic alignment base (5) are arranged in parallel. The connecting plate (4) is connected between the positioning plate (1) and the automatic alignment base (5). The positioning plate (1) is connected to the expansion core cylindrical pin (2) and the positioning diamond pin (3) on the side near the automatic alignment base (5). The automatic alignment base (5) is detachably connected to the adaptive counterweight (6) on the side near the positioning plate (1). The positioning plate (1) has a placement hole (13) and a machining hole (12). The expansion core cylindrical pin (2) includes a mounting post (21) and an expansion core (22). The expansion core (22) has a cross cut (23).

2. The lathe fixture for high-precision open machining of caliper body cylinder bores according to claim 1, characterized in that: Mounting holes (11) are provided on the positioning plate (1).

3. The lathe fixture for high-precision open machining of caliper body cylinder bores according to claim 1, characterized in that: The connecting plate (4) has a hoisting hole (41).

4. The lathe fixture for high-precision open machining of caliper body cylinder bores according to claim 1, characterized in that: The expansion core (22) is made of Cr12MoV.

5. The lathe fixture for high-precision open machining of caliper body cylinder bores according to claim 1, characterized in that: The automatic alignment base (5) has a flange connection port (51) on the side away from the positioning plate (1).

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