Machining device for drilling small positioning surface

Abstract

The utility model belongs to the technical field of mechanical manufacturing, and relates to a drilling device with a small positioning surface, which comprises a base, four uniformly distributed boss bases are arranged on the top surface of the base, and the top surfaces of the boss bases are positioning surfaces of a part to be machined, are in contact with the bottom surface of the part to be machined and are used for positioning the part to be machined. A positioning boss is correspondingly arranged on the to-be-machined part positioning face, the outer diameter of the positioning boss is matched with an inner hole of the part, the positioning boss is used for installing the to-be-machined part, a tightening bolt is arranged on the positioning boss and used for pressing the to-be-machined part, two positioning pins are arranged on the to-be-machined part positioning face, and the to-be-machined part is located between the two positioning pins. According to the machining device, the positioning and correcting efficiency of the part with the small positioning face can be improved, and meanwhile shaping deformation is avoided in the drilling process of the thin-wall part.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical manufacturing and relates to a drilling processing device for a small positioning surface. Background Art

[0002] As the demand for lightweight and precision machining of mechanical products continues to increase, some parts with thin walls and small positioning surfaces face significant challenges in positioning and controlling deformation during machining. To address these challenges, ensure stability during machining, and improve machining efficiency, it is necessary to design a dedicated tooling device to address the machining needs of these thin-walled parts with small positioning surfaces. Utility Model Content

[0003] The purpose of this utility model is to provide a drilling device for thin-walled parts with small positioning surfaces. The device can improve the positioning and correction efficiency of parts with small positioning surfaces, while avoiding plastic deformation during the drilling process of thin-walled parts.

[0004] Technical solution:

[0005] A processing device for drilling holes on small positioning surfaces comprises a base, wherein four evenly arranged boss bases are provided on the top surface of the base, wherein the top surface of the boss base is the positioning surface of the part to be processed, contacts the bottom surface of the part to be processed, and is used to position the part to be processed, wherein a positioning boss is correspondingly provided on the positioning surface of the part to be processed, wherein the outer diameter of the positioning boss matches the inner hole of the part, and is used to install the part to be processed, wherein a tightening bolt is provided on the positioning boss, and is used to press the part to be processed, wherein two positioning pins are provided on the positioning surface of the part to be processed, wherein the part to be processed is located between the two positioning pins, and the rotation of the part to be processed is restricted, and the side surface of the boss base close to the center of the base is a correction reference belt.

[0006] Furthermore, it also includes a compression gasket, which is arranged on the tightening bolt.

[0007] Furthermore, two pin positioning holes for installing positioning pins are provided on the positioning surface of the workpiece to be processed.

[0008] Furthermore, boss drilling avoidance planes are provided on both sides of the positioning boss.

[0009] Furthermore, drilling avoidance grooves are provided on both sides of the boss base.

[0010] Furthermore, the clearance between the limiting pin and the pin positioning hole is no greater than 0.02 mm, and the cylindricity of the pin positioning hole is no greater than 0.02 mm.

[0011] Furthermore, the perpendicularity between the calibration reference belt and the top surface of the base is no more than 0.01 mm, and the flatness is no more than 0.005 mm.

[0012] Beneficial effects:

[0013] The utility model solves the problem of drilling holes in thin-walled parts with small positioning surfaces. The horizontal calibration of the correction reference belt of the processing device is carried out by using a lever micrometer, so that the horizontal calibration of the part processing reference can be achieved, instead of the method of directly performing horizontal calibration on the end face of the part, thus avoiding the problem that the positioning end face of the part is too small to be corrected; the design of the positioning boss and positioning pin on the processing device replaces the traditional clamping methods such as vises, and the rotation of the part to be processed is restricted by the positioning pin, thereby further achieving positioning and eliminating the deformation of thin-walled parts; in addition, the processing device of the utility model is provided with four processing positions, which greatly improves the preparation and processing efficiency and realizes stable and efficient processing of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A three-dimensional diagram of a processing device for drilling holes on small positioning surfaces;

[0015] Figure 2 A schematic diagram of a processing device for drilling holes on small positioning surfaces;

[0016] Among them, 1-base, 2-compression gasket, 3-tightening bolt, 4-limit pin, 5-positioning boss, 6-correction reference belt, 7-boss drilling avoidance plane, 8-pin positioning hole, 9-drilling avoidance groove. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] The utility model proposes a processing device for drilling holes on small positioning surfaces, which includes: a base 1, a clamping gasket 2, a tightening bolt 3, a limit pin 4, a positioning boss 5, a correction reference belt 6, a boss drilling avoidance plane 7, a pin positioning hole 8, and a drilling avoidance groove 9, wherein the base 1 and the limit pin 4 are both cylindrical structures; four evenly arranged boss bases are provided on the top surface of the base 1, and the top surface of the boss base is the positioning surface of the part to be processed. After the part to be processed is installed, it contacts the bottom surface of the part to be processed to realize the positioning of the bottom of the part, and a positioning boss 5 is correspondingly provided on the positioning surface of the part to be processed, and the outer diameter of the positioning boss 5 matches the inner hole of the part. , the part is sleeved on the outside of the positioning boss 5 through its inner hole to realize the installation of the part to be processed. The inner hole of the positioning boss 5 is provided with a thread for installing and tightening the bolt 3, and the tightening bolt 3 and the compression gasket 2 are used to press the part to be processed on the positioning boss 5. Two pin positioning holes 8 for installing the positioning pin 4 are provided on the positioning surface of the part to be processed. The positioning pin 4 is installed in the pin positioning hole 8. The end of the part to be processed is located between the two positioning pins. The positioning pin 4 limits the rotation of the part to be processed to realize further positioning of the positioning pin. The side of the boss base close to the center of the base is the correction reference belt 6, which replaces the direct calibration of the positioning surface of the part, avoiding the problem that the positioning surface of the part is too small to be corrected;

[0019] When performing drilling operations on any parts, the three jaws of the milling machine clamp the outer diameter of the base 1 to keep the base 1 horizontal. The part to be processed is located on the positioning boss 5 of the base. The drill bit of the milling machine moves to the side of the base 1 and faces the part to be processed. When the drill bit processes the part to be processed, the outer circle of the drill bit and the tool holder are located between the two adjacent boss bases and the positioning bosses 5 on the two adjacent boss bases. Therefore, boss drilling avoidance planes 7 are provided on both sides of the positioning boss 5 to avoid the drilling drill bit, and R-shaped drilling avoidance grooves 9 are provided on both sides of the boss base to avoid the drill bit and the tool holder.

[0020] The inner side of the boss base is the correction reference band 6, which is perpendicular to the top surface of the base 1. When performing the drilling operation, the three jaws of the milling machine clamp the outer diameter of the base to keep the base 1 horizontal. The correction reference band 6 is in a horizontal state on the boss base. Therefore, the correction reference band 6 can be used as a horizontal reference when drilling, avoiding the method of directly performing horizontal calibration on the end face of the part, and solving the problem that the positioning end face of the part is too small to be corrected.

[0021] Among them, the two limit pins 4 press the side of the part and ensure that the parallelism of the end face of the part and the correction reference belt 6 meets the requirements. The calibration reference belt 6 can be directly calibrated horizontally through the lever micrometer to achieve horizontal calibration of the part.

[0022] The specific use process of this utility model is:

[0023] 1. Use the three jaws of the fourth axis of the high-speed milling machine to horizontally clamp the outer diameter of the base 1, and use the lever dial indicator to horizontally calibrate the calibration reference belt 6. The calibration reference surface of the calibration reference belt 6 is large and the verticality with the top of the base 1 is less than 0.01mm, and the flatness is less than 0.005mm, which avoids the problem of small calibration reference surface of the part and difficulty in positioning;

[0024] 2. Embed the parts into the two limit pins 4 on the same positioning boss, ensuring that the parts fit tightly with the limit pins 4 without any gap;

[0025] 3. Then use the tightening bolt 3 to pass through the compression gasket 2 and the positioning hole of the part and screw it to the inner hole of the positioning boss 5. Tighten the bolt to tighten the part; use the positioning boss 5 to support the inner hole of the thin-walled part to avoid plastic deformation of the part;

[0026] 4. Rotate the fourth axis of the high-speed milling machine 90 degrees in sequence to complete the drilling of the four parts on the four positioning bosses.

Claims

1. A processing device for drilling holes on small positioning surfaces, characterized in that: The invention comprises a base (1), wherein the top surface of the base (1) is provided with four evenly arranged boss bases, the top surface of the boss base is a positioning surface of the part to be processed, contacts with the bottom surface of the part to be processed, and is used to position the part to be processed, a positioning boss (5) is correspondingly provided on the positioning surface of the part to be processed, the outer diameter of the positioning boss (5) matches the inner hole of the part to be processed, and is used to install the part to be processed, a tightening bolt (3) is provided on the positioning boss (5), and is used to press the part to be processed, two positioning pins (4) are provided on the positioning surface of the part to be processed, the part to be processed is located between the two positioning pins, and the rotation of the part to be processed is restricted, and the side of the boss base close to the center of the base is a calibration reference belt (6).

2. The processing device for drilling small positioning surfaces according to claim 1, characterized in that: It also includes a compression gasket (2), which is arranged on the tightening bolt (3).

3. The processing device for drilling small positioning surfaces according to claim 1, characterized in that: Two pin positioning holes (8) for installing limit pins (4) are provided on the positioning surface of the part to be processed.

4. The processing device for drilling holes on small positioning surfaces according to claim 1, characterized in that: Boss drilling avoidance planes (7) are provided on both sides of the positioning boss (5).

5. The processing device for drilling holes on small positioning surfaces according to claim 4, characterized in that: Drilled avoidance grooves (9) are provided on both sides of the boss base.

6. The processing device for drilling holes on small positioning surfaces according to claim 3, characterized in that: The matching clearance between the limit pin (4) and the pin positioning hole (8) is not greater than 0.02 mm, and the cylindricity of the pin positioning hole (8) is not greater than 0.02 mm.

7. The processing device for drilling holes on small positioning surfaces according to claim 1, characterized in that: The verticality between the calibration reference belt (6) and the top surface of the base (1) is not greater than 0.01 mm, and the flatness is not greater than 0.005 mm.

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