A machining method for eccentric cross holes

Abstract

A processing method for eccentric cross holes includes the following steps: Step (1) clamping the product; Step (2) machining a centering hole; Step (3) machining an axial Φ5 deep hole: adopting a pecking machining method to machine an axial eccentric hole; Step (4) rough machining an axial Φ6 deep hole; Step (5) finish machining an axial Φ6 deep hole; Step (6) machining a radial Φ2.3 hole, intersecting with the axial Φ5 deep hole with a depth of 80 mm; Step (7) removing burrs from the cross holes; Step (8) flushing the burr-removing holes. Using the processing method of the present invention, batch production can be carried out, the processing cost can be reduced, and the product quality can be improved. The entire processing process is completed on a 4-axis double-station machining center. Four products are clamped at one time, and the quality of the processing process is stable and the efficiency is high.

Description

Technical Field

[0001] The present invention belongs to the field of machining, and particularly relates to a method for machining intersecting holes. Background Art

[0002] With the continuous progress of science and technology, electric vehicles have become increasingly popular in daily life. The electric vehicle compressor shaft is the rotating main shaft of the electric vehicle air conditioning system and is the core component of the air conditioner compressor, with high requirements for its design accuracy and processability. Such products mainly have axially eccentric holes and radial holes intersecting with the axially eccentric holes, and there is a positional relationship between the holes and the shaft body. Generally, a 4-axis machining center is used for machining, but when machining on a 4-axis, the cost of the product increases significantly. Using this machining method, only one product can be machined at a time, and the cross-hole burrs need to be removed manually after taking the product out of the machine tool, and often cannot be cleaned thoroughly. There is no internal cooling configuration on the existing hole machining equipment, and the iron filings in the deep holes accumulate in the holes, resulting in low tool life and unstable product quality. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a machining method for eccentric intersecting holes. Through this machining method, mass production can be achieved, the machining cost can be reduced, and the product quality can be improved; during the entire production and machining process, it is completed on a 4-axis double-station machining center. Four products are clamped at one time, and the quality of the machining process is stable and the efficiency is high.

[0004] The machining method for eccentric intersecting holes includes the following steps:

[0005] Step (1) Product clamping: Place the product on the V-shaped fixture of the 4-axis machining center, and clamp it by hydraulic pressure plate. Double-station machining is adopted, with 2 products clamped at each station, and the number of products loaded each time is 4.

[0006] Step (2) Machining the centering hole: Make centering preparations and use a center drill for centering.

[0007] Step (3) Machining the axial Φ5 deep hole: Adopt the peck drilling method to machine the axially eccentric hole.

[0008] Step (4) Rough machining the axial Φ6 deep hole: Machine the eccentric hole, leaving a machining allowance of 0.1 for step (5). When drilling, lift the tool twice for chip removal to improve the hole wall quality and tool life.

[0009] Step (5) Finish machining the axial Φ6 deep hole: Finish machine the eccentric hole to improve the hole diameter accuracy and hole wall roughness. Use the reaming method to machine the hole, and the quality of the hole is stable.

[0010] Step (6) Machining the radial Φ2.3 hole, intersecting with the axial Φ5 80-mm deep hole: Lift the tool twice for chip removal when drilling to improve the hole wall quality and tool life and reduce the burr size.

[0011] Step (7) Deburring the cross hole: Use a 20-fold diameter internally cooled carbide twist drill to perform secondary processing on the hole processed in step (3), then use a carbide twist drill to perform secondary processing on the hole in step (6), polish the inner wall of the hole processed in step (3), and remove the burrs on the hole wall as a whole;

[0012] Step (8) flushing the deburring hole: use a high-pressure water jet pipe to spray water at the Φ2.3 hole. At this time, water enters from the Φ2.3 hole and flows out from the Φ5 deep hole, achieving the purpose of flushing the iron filings in the hole.

[0013] Preferably, in step (3), the pecking method is adopted to process the hole, and a 20-fold diameter internally cooled carbide twist drill is used to process the axial eccentric hole. The tool has good rigidity, so that the iron cuttings generated during drilling are effectively removed from the Φ5 deep hole, the hole diameter quality is stable, and the tool life can be extended.

[0014] Preferably, in step (4), an internally cooled carbide twist drill is used to machine the eccentric hole.

[0015] Preferably, in step (5), an internally cooled carbide reamer is used to finely process the Φ6 hole, thereby stabilizing the hole diameter quality and improving production efficiency.

[0016] Preferably, in step (6), a carbide twist drill is used to drill the hole.

[0017] Preferably, in step (7), a wire brush is used to enter the hole processed in step (3) to polish the hole wall, so that fine burrs fall off the hole wall, making the deburring process more stable and more effectively removing the burrs on the hole wall as a whole.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] (1) It can be mass-produced, reducing processing costs and improving product quality;

[0020] (2) The entire machining process is completed on a 4-axis dual-station machining center, which can clamp 4 products at a time. The machining process has stable quality and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of step (1) of the present invention;

[0022] Figure 2 is a schematic diagram of step (2) of the present invention;

[0023] Figure 3 is a schematic diagram of step (3) of the present invention;

[0024] Figure 4 is a schematic diagram of step (4) of the present invention;

[0025] Figure 5 is a schematic diagram of step (5) of the present invention;

[0026] Figure 6 is a schematic diagram of step (6) of the present invention;

[0027] Figure 7 is a schematic diagram of step (7) of the present invention;

[0028] Figure 8 is a schematic diagram of step (8) of the present invention;

[0029] Figure 9 It is a schematic diagram of the finished product of the present invention. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] Example 1

[0032] like Figures 1-9 As shown, the processing method of eccentric cross holes includes the following steps: step (1) product clamping: placing the product on a V-shaped jig of a 4-axis machining center, clamping it with a hydraulic pressure plate, and adopting double-station processing, with each station clamping 2 products, and the number of products loaded each time is 4; step (2) processing centering holes: making centering preparations, using a center drill for centering; step (3) processing axial Φ5 depth deep holes: using a pecking processing method, using a 20-fold diameter internally cooled carbide twist drill to process the axial eccentric hole, so that the drilling The iron cuttings generated during drilling are effectively removed from the Φ5 deep hole, the hole diameter quality is stable, and the tool life can be extended; step (4) rough machining of the axial Φ6 deep hole: an internally cooled carbide twist drill is used to machine the eccentric hole, and a processing amount of 0.1 is reserved for step (5). The tool is lifted twice during drilling to remove chips, thereby improving the hole wall quality and tool life; step (5) fine machining of the axial Φ6 deep hole: an internally cooled carbide reamer is used to fine machine the Φ6 hole, thereby improving the hole diameter accuracy and hole wall roughness. The hole is machined by reaming, and the hole quality is stable. Step (6) Processing a radial Φ2.3 hole, intersecting with an axial Φ5 deep hole with a depth of 80 mm: lifting the tool twice to remove chips during drilling, thereby improving the hole wall quality and tool life and reducing the size of burrs; Step (7) Deburring the cross hole: using a 20-fold diameter internally cooled carbide twist drill to perform secondary processing on the hole processed in step (3), and then using a carbide twist drill to perform secondary processing on the hole in step (6), using a wire brush to polish the inner wall of the hole processed in step (3) to remove the burrs on the hole wall as a whole; Step (8) Rinse and deburr the hole: using a high-pressure water jet pipe to spray water at the Φ2.3 hole, at this time, water enters from the Φ2.3 hole and flows out from the Φ5 deep hole, thereby achieving the purpose of flushing the iron chips in the hole.

Claims

1. A processing method for eccentric cross holes, comprising the following steps: Step (1) Product clamping: Place the product on the V-shaped jig of the 4-axis machining center, clamp it with a hydraulic pressure plate, and use double-station processing. Each station clamps 2 products, and 4 products are loaded each time; Step (2) Processing the centering hole: Make centering preparations and use a center drill for centering; Step (3) Processing the axial Φ5 deep hole: Use the pecking method to process the axial eccentric hole; Step (4) Rough processing of the axial Φ6 deep hole: Process the eccentric hole, and reserve 0.1 processing volume for step (5). Lift the tool twice to remove chips during drilling to improve the hole wall quality and tool life; Step (5) Fine processing of the axial Φ6 deep hole: Fine processing the eccentric hole to improve the hole diameter accuracy and hole wall roughness, use a reamer The hole is processed in this way, and the quality of the hole is stable; step (6) processes a radial Φ2.3 hole, which intersects with an axial Φ5 deep hole with a depth of 80 mm: lift the tool twice to remove chips during drilling, improve the quality of the hole wall and the life of the tool, and reduce the size of burrs; step (7) removes burrs from cross holes: use a 20-fold diameter internally cooled carbide twist drill to perform secondary processing on the hole processed in step (3), and then use a carbide twist drill to perform secondary processing on the hole in step (6), polish the inner wall of the hole processed in step (3), and remove the burrs on the hole wall as a whole; step (8) rinses and deburrs the hole: use a high-pressure water jet pipe to spray water at the Φ2.3 hole, at this time, water enters from the Φ2.3 hole and flows out from the Φ5 deep hole, so as to achieve the purpose of flushing the iron chips in the hole.

2. The processing method of the eccentric cross-hole according to claim 1, wherein: In step (3), the pecking method is adopted to process the hole, and a 20-fold diameter internally cooled carbide twist drill is used to process the axial eccentric hole. The tool has good rigidity, so that the iron cuttings generated during drilling are effectively removed from the Φ5 deep hole, the hole diameter quality is stable, and the tool life can be extended.

3. The machining method of the eccentric cross holes according to claim 1, characterized in that: In step (4), an internally cooled carbide twist drill is used to machine the eccentric hole.

4. The machining method of the eccentric cross holes according to claim 1, wherein: In step (5), an internally cooled carbide reamer is used to finely process the Φ6 hole, thereby stabilizing the hole diameter quality and improving production efficiency.

5. The machining method of the eccentric cross holes according to claim 1, wherein: In step (6), a carbide twist drill is used to drill a hole.

6. The processing method of the eccentric cross holes according to claim 1, characterized in that: In step (7), a wire brush is used to enter the hole processed in step (3) to polish the hole wall, so that fine burrs fall off the hole wall, making the deburring process more stable and more effective in removing the burrs on the hole wall as a whole.

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