Device for eliminating grinding spiral threads of corundum grinding wheel and machining method

Abstract

The device comprises a base, the base is connected to a grinding machine equipment body, a headstock spindle box and a fixing frame are connected to the upper portion of the base, and the base drives the headstock spindle box and the fixing frame to move in the X-axis direction, the Y-axis direction and the Z-axis direction of the grinding machine equipment body. The headstock spindle box drives a part to rotate around the X axis through a drive plate of the headstock spindle box, and a first tip is connected to the headstock spindle box. The dresser is connected to the fixing frame, a diamond roller is connected to a center shaft of the dresser, and the dresser drives the disc-shaped diamond roller to rotate around the Y axis. The corundum grinding wheel is fixed to the grinding machine equipment body and rotates along the axis of the corundum grinding wheel. The tailstock is connected to the grinding machine equipment body, a second tip of the tailstock is fed in the X-axis direction so as to fix the part with the first tip, and the part is driven by the headstock spindle box to rotate around the X-axis. Compared with the prior art, the surface roughness, the dimensional tolerance and the form and location tolerance of the ground part meet the requirements of drawings, and no spiral threads exist.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grinding processing, in particular to a device and method for eliminating spiral thread of a corundum grinding wheel. BACKGROUND

[0002] As a basic part in modern automobile industry, shaft parts are very common in power transmission and movement, and the elastic sealing of shaft parts is a very common scheme. The principle is that between the rotating shaft and the elastic sealing material, through the form of lip seal, a small amount of oil is allowed to enter between the rotating shaft and the elastic sealing, forming a very thin film state, so that the oil cannot seep out when the rotating shaft rotates at high speed.

[0003] However, in the actual production process, although the size and geometric tolerance and roughness of the rotating shaft oil seal block meet the requirements of the drawing, there is still a risk of oil leakage when the rotating shaft cooperates with the elastic sealing. After research and analysis, the spiral thread on the outer circle surface of the part oil seal block is the key factor causing the sealing leakage.

[0004] The spiral thread on the outer circle of the part oil seal block is transferred to the grinding wheel, and the corundum grinding wheel is trimmed according to the use (the corundum grinding wheel trimming generally has turning, diamond roller, grinding and rolling methods). These trimming methods cannot completely eliminate the spiral thread structure of the corundum grinding wheel, so a processing method for eliminating the spiral thread of the corundum grinding wheel is needed. SUMMARY

[0005] The present application aims to provide a device and method for eliminating the spiral thread of a corundum grinding wheel, which can meet the requirements of the drawing in terms of surface roughness, size tolerance and geometric tolerance of the ground part, and has no spiral thread, thereby solving the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: A device for eliminating the spiral thread of a corundum grinding wheel, comprising: A base connected to the main body of the grinding machine, a headstock box and a fixed frame are connected to the top of the base, and the base can drive the headstock box and the fixed frame to move along the X-axis, Y-axis and Z-axis directions of the main body of the grinding machine.

[0007] The headstock box, the central shaft of which is A-axis, drives the part to rotate around the X-axis through the self-contained dial, and a first center is connected to the headstock box.

[0008] The trimmer, the central shaft of which is B-axis, is connected to the fixed frame, and a diamond roller is connected to the central shaft of the trimmer, and the trimmer drives the disc-shaped diamond roller to rotate around the Y-axis.

[0009] The corundum grinding wheel has a S-axis as a central shaft, and is fixed to a main body of a grinding machine and rotates along the central shaft.

[0010] The tailstock is connected to the main body of the grinding machine, and a second center is fed along the X-axis direction to rotate around the X-axis with the first center fixed part and the part driven by the headstock spindle box.

[0011] A further scheme of the application is that the dresser further comprises a motor, and the disc-shaped diamond roller is detachably connected to an end of a central shaft of the motor.

[0012] A further scheme of the application is that the first center and the second center abut the central holes at two ends of the part.

[0013] A processing method for eliminating spiral patterns of a corundum grinding wheel, which uses the device for eliminating spiral patterns of a corundum grinding wheel, and comprises the following steps: S1, an operator adjusts the corundum grinding wheel to a dressing state, the S-axis of the corundum grinding wheel is started, and the B-axis of the dresser is started; the disc-shaped diamond roller of the dresser rotates around the Y-axis and moves along the X-axis direction; the B-axis, the X-axis and the S-axis are linked to dress the surface of the corundum grinding wheel with patterns; the disc-shaped diamond roller coarsely dresses, finely dresses and finishes the corundum grinding wheel at a certain rotating speed and feed amount.

[0014] S2, the operator adjusts the corundum grinding wheel to a grinding state, the S-axis of the corundum grinding wheel is started, and the A-axis of the headstock spindle box is started; the corundum grinding wheel feeds along the Y-axis direction, and the corundum grinding wheel coarsely grinds, finely grinds and finishes the part twice at a certain rotating speed and feed; thus, the surface roughness, size tolerance and shape and position tolerance of the ground part meet the requirements of the drawing, and there is no spiral pattern.

[0015] A further scheme of the application is that in step 1, the B-axis, the X-axis and the S-axis are linked to dress the surface of the corundum grinding wheel with patterns of “)))); the disc-shaped diamond roller coarsely dresses the corundum grinding wheel at 45 m / s and a feed amount of 0.02; finely dresses the corundum grinding wheel at 35 m / s and a feed amount of 0.002; and finishes the corundum grinding wheel three times at 35 m / s and a feed amount of 0 to refine the surface patterns of “)))”.

[0016] A further scheme of the application is that in step 2, the corundum grinding wheel feeds along the Y-axis direction, and the corundum grinding wheel coarsely grinds the part twice at 45 m / s and a feed amount of 0.03; finely grinds the part twice at 45 m / s and a feed amount of 0.002; and finishes the part twice at 45 m / s and a feed amount of 0.

[0017] The apparatus and processing method for eliminating spiral marks in corundum grinding wheels of the present invention can ensure that the surface roughness, dimensional tolerance, and geometric tolerance of the ground parts meet the requirements of the drawings, and there are no spiral marks, thus avoiding the presence of spiral marks on the outer surface of the oil seal of the parts, which could lead to sealing leakage. Attached Figure Description

[0018] Fig. 1 This is an isometric view of the part of the present invention under the grinding condition.

[0019] Fig. 2 This is a top view of the part of the present invention under the grinding condition.

[0020] Fig. 3 This is an isometric view of the corundum grinding wheel in the dressed state according to the present invention.

[0021] Fig. 4 This is a top view of the corundum grinding wheel in the dressing state according to the present invention.

[0022] In the diagram: 1-base, 2-headstock spindle box, 3-fixed frame, 4-dresser, 5-corundum grinding wheel, 6-parts, 7-tailstock. Detailed Implementation

[0023] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1: As Figs. 1-4 As shown, an apparatus for eliminating spiral marks from corundum grinding wheels includes: Base 1: Connected to the main body of the grinding machine, with the headstock spindle box 2 and the fixing frame 3 fixed on top. It can drive the headstock spindle box 2 and the fixing frame 3 to move along the X-axis, Y-axis and Z-axis of the grinding machine.

[0025] Headstock spindle box 2: Its central axis is the A-axis, which is fixed to the base 1 and connected to the first center. The headstock spindle box 2 drives the component 6 to rotate around the X-axis through its own dial.

[0026] Fixed frame 3: Fixed to the base 1, connected to the dresser 4, so that it moves along the X-axis, Y-axis and Z-axis of the grinding machine with the base 1.

[0027] Dresser 4: Its central axis is the B-axis, fixed to the mounting bracket 3, driving the disc-shaped diamond roller to rotate around the Y-axis. During dressing, it also moves along the X-axis. The B-axis and X-axis are linked, causing the grinding wheel surface to have a “)))” shaped texture, completely solving the spiral texture phenomenon that exists in conventional dressing grinding wheels.

[0028] Corundum grinding wheel 5: Its central axis is the S-axis, which is fixed to the main body of the grinding machine and rotates along its own axis.

[0029] Tailstock 7: connected to the main body of the grinding machine, the second center itself feeds along the X-axis direction, so as to fix the part 6.

[0030] Example 2: This embodiment discloses a processing method for eliminating the spiral pattern of the corundum grinding wheel 5, using the device for eliminating the spiral pattern of the corundum grinding wheel 5 in example 1, including the following steps: One: the operator adjusts the corundum grinding wheel 5 to the grinding wheel dressing state. The S-axis of the corundum grinding wheel 5 is started, and the B-axis of the dresser 4 is started. The disc-shaped diamond roller of the dresser 4 rotates around the Y-axis and moves along the X-axis direction. The B-axis, the X-axis and the S-axis are linked to make the surface of the grinding wheel dress a ")))" pattern. The disc-shaped diamond roller is used to dress the grinding wheel at 45 m / s and a feed rate of 0.02 for rough dressing; at 35 m / s and a feed rate of 0.002 for fine dressing; at 35 m / s and a feed rate of 0 for 3 times of finishing; and the surface ")))" pattern is refined.

[0031] Two: the operator adjusts the corundum grinding wheel 5 to the grinding wheel grinding state. The S-axis of the corundum grinding wheel 5 is started, and the A-axis of the headstock spindle box 2 is started. The corundum grinding wheel 5 feeds along the Y-axis direction, and the grinding wheel is used to coarsely grind the part 6 twice at 45 m / s and a feed rate of 0.03; finely grind the part 6 twice at 45 m / s and a feed rate of 0.002; and finish the part 6 twice at 45 m / s and a feed rate of 0.

[0032] At this point, the surface roughness, dimensional tolerance and geometric tolerance of the ground product meet the requirements of the drawing, and there is no spiral pattern.

[0033] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent transformation or modification made according to the spirit and essence of the present application should be covered within the protection scope of the present application.

Claims

1. A device for eliminating spiral grinding of a corundum grinding wheel, characterized in that, The utility model relates to a kind of grinding machine, including: Base (1) is connected to the main body of grinding machine equipment, top is connected with headstock spindle box (2) and fixed frame (3), base (1) can drive headstock spindle box (2), fixed frame (3) movement along the X axis, Y axis, Z axis direction of grinding machine equipment main body; Headstock spindle box (2), the central shaft is A axis, rotates around X axis by driving part (6) with built-in dial, first center is connected on headstock spindle box (2); Truer (4), the central shaft is B axis, truer (4) is connected to fixed frame (3), diamond roller is connected on the central shaft of truer (4), truer (4) drives disc-shaped diamond roller to rotate around Y axis; Corundum grinding wheel (5), the central shaft is S axis, corundum grinding wheel (5) is fixed to grinding machine equipment main body, rotates along its axis; Tailstock (7) is connected to the main body of grinding machine equipment, and its second center feeds along the X axis direction, so as to be fixed with first center part (6), part (6) rotates around X axis with the driving of headstock spindle box (2).

2. A device for eliminating spiral marks of a corundum grinding wheel according to claim 1, characterized in that: The truer (4) further includes a motor, and the disc-shaped diamond roller is detachably connected to the central shaft end of the motor.

3. A device for eliminating spiral marks of a corundum grinding wheel according to claim 1, characterized in that: The first center and the second center abut the center hole of the part (6) at both ends.

4. A method for eliminating grinding spiral of a corundum grinding wheel using the device for eliminating grinding spiral of a corundum grinding wheel according to any one of claims 1 to 3, characterized in that The method comprises the following steps: S1, the operator adjusts corundum grinding wheel (5) to grinding wheel dressing state, the S axis of corundum grinding wheel (5) is started, and the B axis of truer (4) is started;The disc-shaped diamond roller of truer (4) rotates around Y axis, and simultaneously moves along X axis direction;B axis, X axis, S axis linkage makes the surface of corundum grinding wheel (5) to be repaired ")))” type texture;Disc-shaped diamond roller is roughed, finished and polished to corundum grinding wheel (5) according to certain rotating speed and feed amount; S2, the operator adjusts corundum grinding wheel (5) to grinding wheel grinding state, the S axis of corundum grinding wheel (5) is started, and the A axis of headstock spindle box (2) is started;Corundum grinding wheel (5) feeds along Y axis direction, and the part (6) is roughed, finished and polished twice according to the rotating speed and feed of corundum grinding wheel (5);At this time, the surface roughness, dimensional tolerance and geometric tolerance of the ground part (6) meet the requirements of the drawing, and there is no spiral texture.

5. The method of claim 4, wherein the spiral groove is formed by a diamond wheel having a diamond layer with a thickness of 0.1 to 0.3 mm. In step 1, B axis, X axis, S axis linkage makes the surface of corundum grinding wheel (5) to be repaired ")))” type texture;Disc-shaped diamond roller is roughed to corundum grinding wheel according to 45m / s, feed amount 0.02;Finished to corundum grinding wheel according to 35m / s, feed amount 0.002;Polished to corundum grinding wheel according to 35m / s, feed amount 0, and the surface ")))” type texture is refined.

6. The method of claim 4, wherein the spiral groove is formed by a diamond wheel having a diamond layer with a thickness of 0.1 to 0.3 mm. In step 2, corundum grinding wheel (5) feeds along Y axis direction, and the part (6) is roughed twice according to 45m / s, feed amount 0.03 of corundum grinding wheel (5);Finished twice according to 45m / s, feed amount 0.002 of corundum grinding wheel (5);Polished twice according to 45m / s, feed amount 0 of corundum grinding wheel (5).

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