Eccentric drilling device

Abstract

The utility model provides an eccentric drilling device which is used for machining a workpiece (5) to be machined, the device comprises a core shaft (1), a pin shaft (2), a body (3) and a screw (4), and the core shaft (1) and the body (3) are matched and positioned through the pin shaft (2); the mandrel (1) is configured to be in clearance fit with a workpiece (5) to be machined; the screw (4) is configured to fasten and fix a workpiece (5) to be processed on the body (3); an eccentric hole is formed in the body (3), and a workpiece (5) to be machined is drilled through the eccentric hole. According to the utility model, the scribing process is reduced, the difficulty is reduced, and the assembly location degree is improved. After the drilling device is used, the drilling time is only 3 minutes, the production efficiency can be greatly improved, the cost is reduced, the position accuracy is high, and the percent of pass can reach 95%.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to an eccentric drilling device. Background Technology

[0002] Drilling is a common process in the machining industry. Eccentric holes frequently occur during assembly. Drilling eccentric holes on shaft parts presents challenges in positioning and machining, making it difficult to ensure product consistency. Each workpiece requires marking, clamping, and drilling, taking 15 minutes per workpiece. Even slight misalignment can prevent assembly. Considering production efficiency and processing costs, there is currently a lack of fixtures specifically designed for eccentric drilling. Therefore, this paper proposes a fixture for eccentric drilling to address this issue. Utility Model Content

[0003] The technical problem of this utility model is:

[0004] Eccentric holes frequently occur in assembly: drilling eccentric holes on shaft parts presents problems such as difficulty in positioning, difficulty in machining, difficulty in ensuring product consistency, cumbersome processes, and low machining efficiency.

[0005] The technical solution of this utility model is:

[0006] This utility model proposes an eccentric drilling device for processing a workpiece 5. The eccentric drilling device includes: a mandrel 1, a pin 2, a body 3, and a screw 4, wherein: the mandrel 1 and the body 3 are positioned by the pin 2; the mandrel 1 is configured to have a clearance fit with the workpiece 5; the screw 4 is configured to tighten and fix the workpiece 5 on the body 3; the body 3 is provided with an eccentric hole for drilling the workpiece 5 through the eccentric hole.

[0007] Preferably, the pin 2 is arranged perpendicularly to the screw 4.

[0008] Preferably, the perpendicularity between the screw 4 and the workpiece 5 to be processed is less than ±0.01mm.

[0009] Preferably, the spindle 1 and the body 3 are positioned by a pin 2, with a coaxiality of less than ±0.02.

[0010] Preferably, the workpiece 5 to be processed is fixed to the body 3 by a pin 2, and the coaxiality is required to be less than ±0.02.

[0011] Preferably, the perpendicularity between the screw 4 and the workpiece 5 to be processed is less than ±0.01mm.

[0012] The advantages and beneficial effects of this utility model are:

[0013] This invention can reduce the scribing process, lower the difficulty of operation, and improve the positional accuracy of assembly. After using this invention, the drilling time is only 3 minutes, which can greatly improve production efficiency, reduce costs, and achieve high positional accuracy with a pass rate of up to 95%. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a front view of an eccentric drilling device according to an embodiment of the present invention;

[0016] Figure 2 This is a three-dimensional view of an eccentric drilling device according to an embodiment of the present invention;

[0017] Figure 1 In the middle: 1. mandrel, 2. pin, 3. body, 4. screw, 5. workpiece to be processed. Detailed Implementation

[0018] 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 embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0019] It should be noted that, where there is no conflict, the embodiments of this utility model and the features therein can be combined with each other, and the various embodiments can be referenced and cited in turn. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] Please see Figure 1 An eccentric drilling device includes a mandrel 1, a pin 2, a body 3, a screw 4, and a workpiece 5 to be processed. The mandrel 1 and body 3 are positioned by the pin 2, with a coaxiality less than ±0.02 mm. The workpiece 5 is clearance-fitted to the mandrel 1 and fixed to the body 3 by the pin 2, with a coaxiality less than ±0.02 mm. It is then tightened onto the body 3 by the screw 4, with the perpendicularity between the screw 4 and the workpiece 5 less than ±0.01 mm.

[0021] After installation, the body (3) and the workpiece (5) slide in a linear displacement manner. The pin hole connecting the mandrel (1) and the body (3) should have high positional accuracy. The eccentric hole of the body (3) has high positional accuracy. Drilling is performed by clamping it in a bench vise. This drilling fixture has the characteristics of quick change, accurate positioning, and good consistency.

[0022] During drilling, the parallelism between the body and the bench drill plane is guaranteed to be less than ±0.01mm. The workpiece to be processed is fixed inside the body with screws. The workpiece and the mandrel are fitted with clearance to ensure that the coaxiality between the workpiece and the mandrel is less than ±0.02mm and the perpendicularity between the workpiece and the screw is less than ±0.02mm. Drilling is performed through the eccentric hole on the body to ensure positional deviation and consistency. Simply loosen screw 4 to replace the workpiece 5 and proceed to the next workpiece processing.

[0023] In some embodiments, the mandrel 1 and the body 3 are connected together by a pin 2, and the workpiece to be processed is fixed to the mandrel 1 by a screw 4. Loosening the fixing screws to replace the workpiece 5 ensures quick changeover while maintaining consistency, reducing deviations caused by scribing on individual parts.

[0024] It should be noted that the above process operations can be combined to varying degrees. For the sake of brevity, the implementation methods of various combinations will not be elaborated here. Those skilled in the art can flexibly adjust the order of the above operation steps or flexibly combine the above steps according to actual needs.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should be covered within the protection scope of this utility model.

Claims

1. An eccentric drilling device, characterized in that The eccentric drilling device, used for machining the workpiece (5), includes: a mandrel (1), a pin (2), a body (3), and a screw (4), wherein: The mandrel (1) and the body (3) are positioned by a pin (2); the mandrel (1) is configured to have a clearance fit with the workpiece (5) to be processed; the screw (4) is configured to tighten and fix the workpiece (5) to be processed on the body (3); the body (3) is provided with an eccentric hole for drilling the workpiece (5) through the eccentric hole.

2. The eccentric drilling device according to claim 1, characterized in that, in: The pin (2) is set perpendicular to the screw (4).

3. The eccentric drilling device according to claim 1, characterized in that, in: The perpendicularity between the screw (4) and the workpiece (5) to be processed is less than ±0.01mm.

4. The eccentric drilling device according to claim 1, characterized in that, in: The spindle (1) and the body (3) are positioned by a pin (2), and the coaxiality is less than ±0.

02.

5. The eccentric drilling device according to claim 1, characterized in that, in: The workpiece (5) to be processed is fixed to the body (3) by a pin (2), and the coaxiality is required to be less than ±0.02.

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