Gear with inner hole and double internal spiral oil guide grooves and machining method

Abstract

The invention provides a gear with an inner hole and double inner spiral oil guide grooves and a machining method. The gear comprises a gear body, the inner hole is coaxially formed in the center of the gear body, and the two inner spiral oil guide grooves are formed along the hole wall of the inner hole. And the two inner spiral oil guide grooves are symmetrically arranged at 180 degrees. And the two inner spiral oil guide grooves are crosswise arranged in the forward direction and the reverse direction. The two inner spiral oil guide grooves are machined from the end face of the inner hole to the lubricating spline. The screw pitch F of each inner spiral oil guide groove is 25 mm, the depth D of each inner spiral oil guide groove is 0.8 mm, and the fillet of the bottom of each inner spiral oil guide groove is R1.5. And the aperture of the inner hole is phi 41.7 mm. The double internal spiral oil guide grooves in the gear inner hole enable cooling oil to be cooled fully. By means of 180-degree symmetrical arrangement, the technical problem that cooling oil does not flow during forward and reverse rotation is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of gears and relates to a gear oil groove, and in particular to a gear with an inner hole and double inner spiral oil guide grooves and a processing method thereof. Background Art

[0002] A gearbox is a device that changes the speed ratio and direction of movement. It is used in automobiles, tractors, ships, machine tools and various machines to change the torque, speed and direction of movement transmitted from the driving shaft to the driven shaft according to different working conditions. A gearbox with gear transmission generally consists of a housing and several gear pairs. Most gears used in gearboxes have end face oil grooves. The oil grooves in the prior art only drain and cool the gear end faces, and the cooling effect needs to be further improved. Summary of the invention

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a gear having an inner hole with double inner spiral oil guide grooves and a processing method, so as to solve the technical problem that the cooling effect of the gear in the prior art needs to be further improved.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve the above problems:

[0005] A gear with an inner hole and double inner spiral oil guide grooves comprises a gear body, the center of the gear body is coaxially provided with an inner hole, and two inner spiral oil guide grooves are provided along the hole wall of the inner hole.

[0006] The present invention also has the following technical features:

[0007] The two inner spiral oil guide grooves are arranged symmetrically at 180 degrees.

[0008] The two inner spiral oil guide grooves are arranged crosswise in forward and reverse directions.

[0009] The two inner spiral oil guide grooves are machined from the end surface of the inner hole to the lubrication spline.

[0010] The pitch F of the two inner spiral oil guide grooves is 25 mm, the depth D is 0.8 mm, and the groove bottom radius is R1.5.

[0011] The diameter of the inner hole is Φ41.7 mm.

[0012] The present invention also protects a method for processing a gear having an inner hole with double inner spiral oil guide grooves as described above, wherein the two inner spiral oil guide grooves are respectively a first inner spiral oil guide groove and a second inner spiral oil guide groove.

[0013] The method comprises the following steps:

[0014] Step 1: Clamp the gear body with an inner hole diameter of Φ41.7mm on the chuck of the CNC lathe, build the workpiece coordinate system, and use the R1.5 inner hole arc groove cutter to align the tool. The center of the R1.5 inner hole arc groove cutter is facing Z0 at the outer end of the inner hole, and the tool tip is aligned with X41.7 on the wall of the inner hole. Align the tool coordinate position, return the tool to a safe position, and prepare for processing.

[0015] Step 2: Call the inner hole arc groove cutter of tool R1.5, rotate at 120r / min, reverse the chuck, and quickly locate the tool on the workpiece. The inner diameter of the workpiece is X41.7, and the starting point is Z-2.55. The tool is quickly positioned at a safe clearance position in the workpiece to prepare for machining the oil groove.

[0016] Step 3: Feed the tool to the starting point of the first inner spiral oil guide groove at X42, Z-2.55, F25.

[0017] Step 4, the distance from the starting point to the end point of the tool is 25 mm, and the pitch F is 25; the first inner spiral oil guide groove (301) is processed for the first time, and the tool is withdrawn from the processed first inner spiral oil guide groove, and the spiral groove is withdrawn, and the tool is withdrawn quickly: the tool is quickly withdrawn to a position with a safe gap from the workpiece.

[0018] Step 5: Use a CNC lathe to index 180°, and position the tool to the 180° position symmetrical to the processed first inner spiral oil guide groove, which is also the starting point of the second inner spiral oil guide groove.

[0019] Step six, the distance from the starting point to the end point of the tool is 25mm, the pitch F is 25mm, the second inner spiral oil guide groove processing is completed, the tool is retracted from the spiral line, the spiral groove is retracted, and the tool is retracted quickly to a position with a safe gap from the workpiece.

[0020] Step 7: According to the depth requirement of the inner spiral oil guide groove, process 0.15mm depth on one side each time, repeat the process several times until the depth requirement is met, and finally obtain the following: Figure 5 and Figure 6 The gear shown has double internal spiral oil guide grooves in the inner hole.

[0021] Compared with the prior art, the present invention has the following technical effects:

[0022] (I) The double inner spiral oil guide grooves in the inner hole of the gear of the present invention allow the cooling oil to be cooled sufficiently.

[0023] (II) The 180° symmetrical arrangement of the present invention causes the cooling oil to not flow during forward and reverse rotation.

[0024] (III) The method of the present invention is cleverly designed, solves the processing technology problem, and realizes 180° processing of double inner spiral grooves. The oil guiding effect is obvious and suitable for mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the cross-sectional structure of a gear with an inner hole and double inner spiral oil guide grooves.

[0026] Figure 2 for Figure 1 Schematic diagram of the GG cross-sectional structure.

[0027] Figure 3 This is a schematic diagram of the model of a gear with double internal spiral oil guide grooves in the inner hole.

[0028] Figure 4 This is a schematic diagram of the machining state model of a gear with double internal spiral oil guide grooves in the inner hole.

[0029] Figure 5 This is a real photo of a gear with double internal spiral oil guide grooves in the inner hole.

[0030] Figure 6 This is another real photo of a gear with double internal spiral oil guide grooves in the inner hole.

[0031] The meanings of the numbers in the figure are: 1-gear body, 2-inner hole, 3-inner spiral oil guide groove, 301-first inner spiral oil guide groove, 302-second inner spiral oil guide groove.

[0032] The specific contents of the present invention are further explained in detail below in conjunction with embodiments. DETAILED DESCRIPTION

[0033] It should be noted that, unless otherwise specified, all devices, codes and components in the present invention are devices, codes and components known in the prior art.

[0034] Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0035] Embodiment 1:

[0036] This embodiment provides a gear with an inner hole and double inner spiral oil guide grooves, such as Figure 1 and Figure 2 As shown, it comprises a gear body 1 , an inner hole 2 is coaxially opened at the center of the gear body 1 , and two inner spiral oil guide grooves 3 are opened along the hole wall of the inner hole 2 .

[0037] like Figure 1 and Figure 2 As shown, the two inner spiral oil guide grooves 3 are arranged symmetrically at 180°.

[0038] like Figure 1 and Figure 2As shown, the two inner spiral oil guide grooves 3 are arranged crosswise in the forward and reverse directions.

[0039] like Figure 1 and Figure 2 As shown, two inner spiral oil guide grooves 3 are machined from the end face of the inner hole 2 to the lubrication spline.

[0040] The pitch F of the two inner spiral oil guide grooves 3 is 25 mm, the depth D is 0.8 mm, and the groove bottom radius is R1.5.

[0041] The diameter of the inner hole 2 is Φ41.7 mm.

[0042] Embodiment 2:

[0043] This embodiment provides a method for processing a gear having an inner hole and double inner spiral oil guide grooves provided in Embodiment 1, such as Figure 3 As shown, the two inner spiral oil guiding grooves 3 are respectively a first inner spiral oil guiding groove 301 and a second inner spiral oil guiding groove 302 .

[0044] The present invention adopts a known CNC lathe with a Frank system. Program code description in the Frank system: G32 is a G code for thread cutting, G0 represents rapid movement to a point position, (X, Z) is the coordinate position of the tool, and F represents the pitch.

[0045] like Figure 4 As shown, the method comprises the following steps:

[0046] Step 1, clamp the gear body 1 with the inner hole 2 having a diameter of Φ41.7mm on the chuck of the CNC lathe, build the workpiece coordinate system, and use the R1.5 inner hole arc groove cutter to align the tool. The center of the R1.5 inner hole arc groove cutter is at the outer end of the inner hole 2 facing Z0, and the tool tip is at the hole wall of the inner hole 2 at X41.7. Align the tool coordinate position, return the tool to a safe position, and prepare for processing.

[0047] Step 2: Call the inner hole arc groove cutter of tool R1.5 (code T0909), speed 120r / min (code G97S120), chuck reverse (code M04), quickly locate the tool on the workpiece (code G0X38.Z20), workpiece inner diameter X41.7, starting point Z-2.55, quickly locate the tool on the workpiece to prepare for the safe clearance position of the oil groove (code G0X38.Z-2.55).

[0048] Step 3: feed the tool to the starting point X42, Z-2.55, F25 (code G32X42.Z-2.55F25) of the first inner spiral oil guide groove 301 (the first feed cutting depth is X42-X41.7=0.3mm).

[0049] Step 4: The distance from the starting point to the end point of the tool is 25 mm, and the pitch F is 25; the first inner spiral oil guide groove 301 is processed for the first time, and the tool is retracted from the processed first inner spiral oil guide groove 301 (code G32 Z-27.55F25), the spiral groove is retracted, and the tool is retracted quickly (code G32 X39.Z-27.55F25): the tool is quickly retracted to a position with a safe clearance from the workpiece (code G0 X38.Z-27.55), preparing for indexing 180°.

[0050] Step 5. Since another 180° symmetrical cross inner spiral oil guide groove 3 is processed on the wall of the inner hole 2, the CNC lathe machine tool code is required to index (the Q18000 command can achieve this function).

[0051] The CNC lathe is used to index 180°, and the tool is positioned to the 180° position symmetrical to the processed first inner spiral oil guide groove 301 (code G32 X42.Z-27.55F25.Q180000), which is also the starting position of the second inner spiral oil guide groove 302.

[0052] Step 6: The distance from the starting point to the end point of the tool is 25mm, the pitch F is 25mm, the processing of the second inner spiral oil guide groove 302 is completed, the tool is retracted from the spiral line (code G32 Z-2.55F25), the spiral groove is retracted, and the tool is retracted quickly (code G32X39.Z-2.55F25.). The tool is quickly retracted to a position with a safe clearance from the workpiece (code G0 X38.Z-2.55) to prepare for the next cycle processing.

[0053] Step 7: According to the depth requirement of the inner spiral oil guide groove 3, the depth of each single side is processed by 0.15mm, and the processing is repeated several times until the depth requirement is met, and finally the following is obtained: Figure 5 and Figure 6 The gear shown has double internal spiral oil guide grooves in the inner hole.

Claims

1. A gear with an inner hole and double inner spiral oil guide grooves, comprising a gear body (1), wherein the center of the gear body (1) is coaxially provided with an inner hole (2), characterized in that: Two inner spiral oil guide grooves (3) are provided along the hole wall of the inner hole (2).

2. The gear with inner hole double inner spiral oil guide grooves as claimed in claim 1, characterized in that: The two inner spiral oil guide grooves (3) are arranged symmetrically at 180°.

3. The gear with inner hole double inner spiral oil guide grooves as claimed in claim 2, characterized in that: The two inner spiral oil guide grooves (3) are arranged crosswise in the forward and reverse directions.

4. The gear with inner hole double inner spiral oil guide grooves as claimed in claim 3, characterized in that: The two inner spiral oil guide grooves (3) are machined from the end surface of the inner hole (2) to the lubrication spline.

5. The gear with inner hole double inner spiral oil guide grooves as claimed in claim 1, characterized in that: The pitch F of the two inner spiral oil guide grooves (3) is 25 mm, the depth D is 0.8 mm, and the groove bottom radius is R1.

5.

6. The gear with inner hole double inner spiral oil guide grooves as claimed in claim 5, characterized in that: The diameter of the inner hole (2) is Φ41.7 mm.

7. A method for machining a gear having an inner hole with double inner spiral oil guide grooves as claimed in claim 6, characterized in that: The two inner spiral oil guide grooves (3) are respectively a first inner spiral oil guide groove (301) and a second inner spiral oil guide groove (302); The method comprises the following steps: Step 1: Clamp the gear body (2) with an inner hole (2) having an aperture of Φ41.7 mm on the chuck of a CNC lathe, establish a workpiece coordinate system, align the tool with an R1.5 inner hole circular arc groove cutter, with the center of the R1.5 inner hole circular arc groove cutter facing Z0 at the outer end of the inner hole (2), and the tool tip aligning the tool with X41.7 on the hole wall of the inner hole (2), align the tool coordinate position, return the tool to a safe position, and prepare for processing; Step 2: Call the inner hole arc groove cutter of tool R1.5, rotate at 120r / min, reverse the chuck, and quickly locate the position of the tool on the workpiece. The inner diameter of the workpiece is X41.7, and the starting point is Z-2.

55. Quickly locate the tool at the safe clearance position of the workpiece to prepare for machining the oil groove; Step 3, feed the tool to the starting point position X42, Z-2.55, F25 of the first inner spiral oil guide groove (301); Step 4: the distance from the starting point to the end point of the tool is 25 mm, and the pitch F is 25; the first inner spiral oil guide groove (301) is processed for the first time, and the tool is withdrawn from the processed first inner spiral oil guide groove (301), and the spiral groove is withdrawn, and the tool is withdrawn quickly: the tool is quickly withdrawn to a position with a safe gap from the workpiece; Step 5, using a CNC lathe to index 180°, the tool is positioned at a 180° position symmetrical to the processed first inner spiral oil guide groove (301), which is also the starting position of the second inner spiral oil guide groove (302); Step 6: The distance from the starting point to the end point of the tool is 25 mm, the pitch F is 25 mm, the second inner spiral oil guide groove (302) is processed, the tool is withdrawn from the spiral line, the spiral groove is withdrawn, and the tool is withdrawn quickly to a position with a safe gap from the workpiece; Step 7, according to the depth requirement of the inner spiral oil guide groove (3), process one side 0.15mm deep each time, and repeat the process several times until the depth requirement is met.

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