High-precision universal grinding wheel trimming mechanism and fillet trimming method thereof

Abstract

The invention belongs to the technical field of machining, and particularly relates to a high-precision universal grinding wheel trimming mechanism, a fillet trimming method thereof and a base. The arc-shaped guide rail is fixedly installed on the base and provided with an arc-shaped guide groove, and an arc-shaped conical rack is fixed in the arc-shaped guide groove; the rotary sliding block is slidably mounted on the arc-shaped guide rail, and a position adjusting rod device and a cutter device are mounted on the rotary sliding block; all planes of a grinding wheel can be finished accurately, rapidly and safely, meanwhile, arc surfaces needed for machining of inner and outer circle grinding wheels can be finished, the arc surfaces of machined parts have high geometric precision and surface roughness, the size precision can reach 0.02 mm, the mechanism further has the function of adjusting the radius of the finished arc, and the machining efficiency is improved. Finishing of different arc radiuses can be met, and the machining precision and the machining range of common equipment are greatly improved.

Description

Technical Field

[0001] The present application belongs to the field of mechanical processing technology, and particularly relates to a high-precision universal grinding wheel dressing mechanism and a fillet dressing method thereof. Background Art

[0002] At present, the grinding wheel accessories of ordinary universal grinders can only trim the outer cylindrical surface of the straight grinding wheel. If parts with inner and outer arc surfaces are to be processed, the operator needs to use a handheld diamond pen to trim the sharp corners of the grinding wheel to trim the inner and outer arc surfaces corresponding to the arc of the part, and then use the arc template to compare whether the trimmed arc surface meets the template. The existing technology has the following shortcomings:

[0003] 1. The grinding wheel repair accessories of ordinary universal grinders can only repair the straight outer cylindrical surface of the grinding wheel, and cannot repair the inner and outer arc surfaces of the grinding wheel, so the processing range is small.

[0004] 2. The operating stability is poor when using a diamond pen to dress the grinding wheel, which can easily cause hand abrasions and safety accidents.

[0005] 3. Manual dressing takes a long time. After processing a few pieces, the grinding wheel is worn and needs to be re-dressed, which reduces production efficiency.

[0006] 4. The accuracy of manual arc trimming is generally 0.1-0.2mm, which cannot meet the requirements of high-precision part drawings. Summary of the invention

[0007] In order to solve the above problems, the present application provides a high-precision universal grinding wheel dressing mechanism, comprising:

[0008] Pedestal;

[0009] An arc-shaped guide rail is fixedly mounted on the base and has an arc-shaped guide groove, in which an arc-shaped bevel rack is fixed;

[0010] The rotating slide block is slidably mounted on the arc guide rail, and a position adjusting rod device and a tool device are mounted on the rotating slide block;

[0011] The position adjusting rod device comprises a rotating rod mounted on the rotating slider, the rotating rod can be rotatably mounted in the hole of the rotating slider, a bevel gear knob is fixed to the outer end of the rotating rod, a bevel gear is fixed to the inner end of the rotating rod, the bevel gear is meshed with the arc-shaped bevel rack, the bevel gear knob is rotated, and the bevel gear rotates to drive the rotating slider to slide on the arc guide rail;

[0012] The tool device comprises: a feed knob and a diamond pen. The diamond pen can be axially slidably installed in a tool mounting hole of a rotating slider. One end of the diamond pen has a tool head and the other end has an internal threaded hole. The feed knob is axially limited and installed in the tool mounting hole. One end has a screw connected to the internal threaded hole and the other end has a knob. Rotating the knob drives the axial extension and contraction of the diamond pen.

[0013] Preferably, a locking screw is provided on the rotating slider, and the locking screw is screwed into and abuts against the surface of the diamond pen to limit the axial movement of the diamond pen.

[0014] Preferably, the rotating slider has a window for observing the diamond pen, and both the window and the diamond pen have scales.

[0015] Preferably, the feed knob is provided with an annular groove, and a corresponding position of the tool mounting hole is provided with an annular protrusion, and the annular groove is clamped in the annular protrusion to limit the axial displacement of the feed knob.

[0016] Preferably, both ends of the arc-shaped guide rail are provided with limit blocks for limiting the escape of the rotating slider.

[0017] The axial direction of the diamond pen corresponding to the two extreme positions of the rotating slide block on the arc-shaped guide rail is at right angles.

[0018] A method for repairing an outer arc of a grinding wheel, comprising:

[0019] Step 1, installing the high-precision universal grinding wheel repairing mechanism as described in any one of claims 1 to 6 on one side of the grinding wheel of the grinding machine; making the diamond pen tip be located at the center of the arc guide rail;

[0020] Step 2, rotate the bevel gear knob to make the axis of the diamond pen perpendicular to the horizontal axis of the grinding wheel; feed the Y-axis of the grinder to make the outer cylindrical surface of the grinding wheel contact with the diamond pen tip, and feed along the X-axis at the same time to flatten the outer cylindrical surface of the grinding wheel, and record the Y-axis scale of the grinder; wherein the X-axis is parallel to the grinding wheel axis, the Y-axis is perpendicular to the X-axis, and both the Y-axis and the X-axis are located in the horizontal plane;

[0021] Step 3, rotate the bevel gear knob to make the axis of the diamond pen parallel to the X-axis, feed the X-axis of the grinder to make the side of the grinding wheel contact with the diamond pen tip, and feed along the Y-axis to flatten the side of the grinding wheel; the X-axis of the grinder remains unchanged, and the Y-axis of the grinder is moved back to the recorded Y-axis scale of the grinder. At this time, the diamond pen tip and the sharp point of the side surface flattened by the grinding wheel are at the center of the arc guide at the same time;

[0022] Step 4, repair the outer arc of the grinding wheel with a radius of R, and reduce the extended length of the diamond pen by a certain length, which is equal to the length of the hypotenuse of the isosceles right triangle with the right angle side R;

[0023] Step 5. Move the grinding wheel forward R along the X-axis and Y-axis respectively, turn the bevel gear knob to move the axis of the diamond pen to a position with an angle of 45° with the axis of the grinding wheel, feed the diamond pen with a total feed amount of R and a single feed amount of 0.1mm~0.2mm, and at the same time make the diamond pen slide along the arc guide rail to perform arc dressing on the sharp corner of the grinding wheel.

[0024] A method for repairing the inner arc of a grinding wheel, comprising: step 1, installing the high-precision universal grinding wheel repairing mechanism as described in any one of claims 1 to 6 on one side of the grinding wheel of a grinding machine; making the diamond pen tip be located at the center of an arc guide rail;

[0025] Step 2, rotate the bevel gear knob to make the axis of the diamond pen perpendicular to the horizontal axis of the grinding wheel; feed the Y-axis of the grinder to make the outer cylindrical surface of the grinding wheel contact with the diamond pen tip, and feed along the X-axis at the same time to flatten the outer cylindrical surface of the grinding wheel, and record the Y-axis scale of the grinder; wherein the X-axis is parallel to the grinding wheel axis, the Y-axis is perpendicular to the X-axis, and both the Y-axis and the X-axis are located in the horizontal plane;

[0026] Step 3, rotate the bevel gear knob to make the axis of the diamond pen parallel to the X-axis, feed the X-axis of the grinder to make the side of the grinding wheel contact with the diamond pen tip, and feed along the Y-axis to flatten the side of the grinding wheel; the X-axis of the grinder remains unchanged, and the Y-axis of the grinder is moved back to the recorded Y-axis scale of the grinder. At this time, the diamond pen tip and the sharp point of the side surface flattened by the grinding wheel are at the center of the arc guide at the same time;

[0027] Step 4. Turn the bevel gear knob to move the axis of the diamond pen to a position with an angle of 45° with the axis of the grinding wheel. Feed the diamond pen with a total feed amount of R and a single feed amount of 0.1mm to 0.2mm. At the same time, slide the diamond pen along the arc guide rail to perform arc dressing on the sharp corner of the grinding wheel.

[0028] The advantages of the present application include: the mechanism can accurately, quickly and safely dress the various planes of the grinding wheel, and can also dress the arc surfaces required for processing the inner and outer circular grinding wheels, so that the arc surfaces of the processed parts have higher geometric accuracy and surface roughness, and the dimensional accuracy can reach 0.02mm. The mechanism also has an adjustable dressing arc radius function, which can meet the dressing of different arc radii, greatly improving the processing accuracy and processing range of ordinary equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional diagram of a high-precision universal grinding wheel repair mechanism;

[0030] Figure 2 It is a top view of a high-precision universal grinding wheel dressing mechanism.

[0031] Figure 3 Bevel gear knob drive cross section.

[0032] Figure 4Feed knob drive cross section.

[0033] Figure 5 Schematic diagram of a graduated vernier ruler.

[0034] Figure 6 Schematic diagram of dressing the outer arc of the grinding wheel.

[0035] Figure 7 Schematic diagram of dressing the inner arc of the grinding wheel. DETAILED DESCRIPTION

[0036] In order to make the technical solution and advantages of the present application clearer, the technical solution of the present application will be further described in detail in detail and in detail in conjunction with the accompanying drawings. It can be understood that the specific embodiments described here are only partial embodiments of the present application, which are only used to explain the present application, not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, and other related parts can refer to the general design. In the absence of conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0037] In addition, it should be noted that, unless otherwise clearly specified and limited, the words "installed", "connected", "connected" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. Technical personnel in the field can understand their specific meanings in this application according to the specific circumstances.

[0038] A high-precision adjustable grinding wheel dressing mechanism (see Figure 1 ),include:

[0039] Base (1); the base is fixed on the bed surface of the universal grinder;

[0040] The arc guide rail (3) is fixedly mounted on the base (1) and has an arc guide groove in which an arc bevel rack (11) is fixed. There are two left and right base fixing positions below the arc guide rail, which are positioned by pins and connected by screws, and the centripetal angle between the two positions is 90 degrees.

[0041] A rotating slide block (2) is installed in a slot of the arc-shaped guide rail and can slide along the arc-shaped guide rail with a small gap. A position adjusting rod device and a tool device are installed on the rotating slide block;

[0042] The position adjusting rod device comprises a rotating rod mounted on a rotating slider (2), the rotating rod being rotatably mounted in a hole of the rotating slider (2), a bevel gear knob (4) being fixed to the outer end of the rotating rod, a bevel gear (10) being fixed to the inner end of the rotating rod, the bevel gear (10) being meshed with the arc-shaped bevel rack (11), and the bevel gear knob (4) being rotated, the bevel gear (10) is rotated to drive the rotating slider (2) to slide on the arc-shaped guide rail (3); (see Figure 3 );

[0043] The tool device comprises: a feed knob (5) and a diamond pen (7). The diamond pen (7) can be axially slidably installed in a tool mounting hole provided by a rotating slider (2). One end of the diamond pen (7) has a cutter head and the other end has an internal threaded hole. The feed knob (5) is axially limited and installed in the tool mounting hole. One end has a screw connected to the internal threaded hole and the other end has a knob. The diamond pen (7) is driven to axially extend and contract. The diamond pen tip is at the same height as the horizontal axis of the grinding wheel. By rotating the feed knob, the diamond pen can be moved along the axis in the hole without rotating to achieve feed through thread transmission and the restriction of the stop pin in the hole (see Figure 4 ), the rotating slide block (2) has a window for observing the diamond pen (7), and both the window and the diamond pen (7) have scales. The cutting depth is achieved by observing the scale vernier ruler, and the vernier ruler has an accuracy of 0.02 mm (see Figure 5 ), two limit blocks are respectively fixed at the two ends of the arc guide rail, when the rotating slider is close to the limit blocks at the two ends, the axis angle of the diamond pen at the two positions is 90°. A locking screw (8) is provided on the rotating slider (2), and the locking screw (8) is screwed into the surface of the diamond pen (7) to limit the axial movement of the diamond pen (7).

[0044] The feed knob (5) is provided with an annular groove, and a corresponding position of the tool mounting hole is provided with an annular protrusion, and the annular groove is clamped in the annular protrusion to limit the axial displacement of the feed knob (5).

[0045] The specific applications are as follows:

[0046] Step 1: Find the center of the circle

[0047] First, rotate the feed knob to align the zero position of the diamond pen cursor scale with the middle zero position of the fixed scale, tighten the locking screw to keep the diamond pen tip in a fixed spatial position, and turn the bevel gear knob to make the rotating slider close to the right end limit block. At this time, the diamond pen axis is perpendicular to the horizontal axis of the grinding wheel. The Y-axis feed of the grinder makes the diamond pen tip contact with the outer cylindrical surface of the grinding wheel. At the same time, the X-axis moves left and right to flatten the outer cylindrical surface of the grinding wheel so that the diamond pen tip and the outer cylindrical surface of the grinding wheel are on the same cutting plane. Remember the Y-axis scale, and then rotate the bevel gear knob in the opposite direction to make the rotating slider close to the left end limit block. At this time, the diamond pen axis is parallel to the horizontal axis of the grinding wheel. The X-axis feed diamond pen tip of the grinder contacts with the left end surface of the grinding wheel. At the same time, the Y-axis moves left and right to flatten the left end surface of the grinding wheel. The X-axis remains unchanged and the Y-axis is moved back to the recorded scale; at this time, the diamond pen tip and the left tip of the grinding wheel are at the center of the arc guide at the same time;

[0048] Step 2: Repair the outer arc of the grinding wheel.

[0049] When repairing the outer arc of the grinding wheel (assuming the value of the repaired arc is R5mm), first loosen the locking screw, rotate the feed knob, refer to the scale vernier ruler to move the diamond pen back an isosceles right triangle with a right angle of 5mm and a hypotenuse length of ≈7.07, then feed the grinder X and Y axes by 5mm respectively, rotate the bevel gear knob to move the diamond pen axis to a position with an angle of about 45° with the grinding wheel axis, at this time the diamond pen tip is at the top of the sharp corner on the left side of the grinding wheel, then rotate the feed knob, Make the diamond pen advance 0.1mm~0.2mm, tighten the locking screw, rotate the bevel gear knob to make the diamond pen tip do arc trimming action on the left corner of the grinding wheel, repeat the process of advance-trim, advance 0.1mm~0.2mm each time, until the zero position of the vernier scale of the diamond pen is aligned with the 5mm position of the fixed scale (the actual advance size is 7.07-5=2.07mm). After the trimming is completed, the outer arc of the left corner of the grinding wheel is R5. (See Figure 6 ).

[0050] Step 3: Repair the inner arc of the grinding wheel

[0051] When repairing the inner arc of the grinding wheel, first repeat step 1, loosen the locking screw, rotate the feed knob, and refer to the scale vernier to feed the diamond pen 0.1mm~0.2mm. The diamond pen tip has passed the center of the arc guide rail. At this time, turn the bevel gear knob to form an inner arc in the opposite direction of the movement trajectory of the diamond pen tip before passing the center. Tighten the locking screw, rotate the bevel gear knob to make the rotating slider drive the diamond pen tip to perform inner arc dressing on the left side of the grinding wheel. Repeat the feed-dressing process, feed 0.1mm~0.2mm each time, until the vernier scale feeds forward 5mm. At this time, the left side of the grinding wheel has been trimmed into an inner fillet of R5mm (see Figure 7 ).

[0052] Step 4: Adjust the right R angle of the grinding wheel

[0053] If you want to trim the right R angle of the grinding wheel, you need to move the base from the right side of the arc guide rail to the left side, and then repeat steps 1.2.3.

[0054] Step 5: Trim the large R angle of the grinding wheel

[0055] If you want to trim the large R angle of the grinding wheel, you must increase the geometric radius of the arc guide to the corresponding value for processing. After replacement and installation, repeat steps 1.2.3.4 to meet the requirements.

[0056] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A high-precision universal grinding wheel repairing mechanism, characterized in that: include: Base (1); An arc-shaped guide rail (3) is fixedly mounted on the base (1) and has an arc-shaped guide groove, in which an arc-shaped bevel rack (11) is fixed; A rotating slide block (2) is slidably mounted on an arc-shaped guide rail (3), on which a position adjusting rod device and a tool device are mounted; A position adjusting rod device, the position adjusting device comprising a rotating rod mounted on a rotating slider (2), the rotating rod being rotatably mounted in a hole of the rotating slider (2), a bevel gear knob (4) being fixed to the outer end of the rotating rod, a bevel gear (10) being fixed to the inner end of the rotating rod, the bevel gear (10) being meshed with the arc-shaped bevel rack (11), and the bevel gear knob (4) being rotated, the bevel gear (10) rotatingly drives the rotating slider (2) to slide on the arc-shaped guide rail (3); The tool device comprises: a tool feed knob (5) and a diamond pen (7); the diamond pen (7) can be axially slidably installed in a tool installation hole provided by a rotating slide block (2); one end of the diamond pen (7) has a tool head and the other end has an internal thread hole; the tool feed knob (5) is axially limitedly installed in the tool installation hole; one end has a screw connected to the internal thread hole and the other end has a knob; the knob is rotated to drive the axial extension and contraction of the diamond pen (7).

2. The high-precision universal grinding wheel dressing mechanism according to claim 1, characterized in that: A locking screw (8) is provided on the rotating slide block (2). The locking screw (8) is screwed into and abuts against the surface of the diamond pen (7) to limit the axial movement of the diamond pen (7).

3. The high-precision universal grinding wheel dressing mechanism according to claim 1, characterized in that: The rotating slide block (2) has an opening window for observing the diamond pen (7), and both the opening window and the diamond pen (7) have scales.

4. The high-precision universal grinding wheel dressing mechanism according to claim 1, characterized in that: The feed knob (5) is provided with an annular groove, and a corresponding position of the tool mounting hole is provided with an annular protrusion, and the annular groove is clamped in the annular protrusion to limit the axial displacement of the feed knob (5).

5. The high-precision universal grinding wheel dressing mechanism according to claim 1, characterized in that: Both ends of the arc-shaped guide rail (3) are provided with limiting blocks (9) for limiting the escape of the rotating slider (2).

6. The high-precision universal grinding wheel dressing mechanism according to claim 1, characterized in that: The axial direction of the diamond pen (7) corresponding to the two extreme positions of the rotating slide block (2) on the arc-shaped guide rail (3) is at right angles.

7. A method for repairing the outer arc of a grinding wheel, characterized in that: include: Step 1, installing the high-precision universal grinding wheel repairing mechanism as described in any one of claims 1 to 6 on one side of the grinding wheel of the grinding machine; making the diamond pen (7) so that the pen tip is located at the center of the arc guide rail; Step 2, rotating the bevel gear knob (4) to make the axis of the diamond pen (7) perpendicular to the horizontal axis of the grinding wheel; feeding the grinding machine along the Y axis to make the outer cylindrical surface of the grinding wheel contact with the diamond pen tip, while feeding along the X axis to flatten the outer cylindrical surface of the grinding wheel, and recording the Y axis scale of the grinding machine; wherein the X axis is parallel to the grinding wheel rotation axis, the Y axis is perpendicular to the X axis, and the Y axis and the X axis are both located in the horizontal plane; Step 3, rotating the bevel gear knob (4) to make the axis of the diamond pen (7) parallel to the X-axis, feeding the X-axis of the grinder so that the side of the grinding wheel contacts the diamond pen tip, and feeding along the Y-axis at the same time to flatten the side of the grinding wheel; the X-axis of the grinder remains unchanged, and the Y-axis of the grinder is moved back to the recorded Y-axis scale of the grinder. At this time, the diamond pen tip and the sharp point of the side surface flattened by the grinding wheel are at the center of the arc guide at the same time; Step 4, repairing the outer arc of the grinding wheel with a radius of R, reducing the extended length of the diamond pen (7) by a certain length, wherein the certain length is equal to the length of the hypotenuse of the isosceles right triangle with the right angle side R; Step 5: Move the grinding wheel forward by R along the X-axis and the Y-axis respectively, turn the bevel gear knob (4) to move the axis of the diamond pen (7) to a position where the angle with the axis of the grinding wheel is 45°, feed the diamond pen (7) with a total feed amount of R and a single feed amount of 0.1 mm to 0.2 mm, and at the same time make the diamond pen (7) slide along the arc guide rail (3) to perform arc trimming on the sharp corner of the grinding wheel.

8. A method for repairing the inner arc of a grinding wheel, characterized in that: include: Step 1, installing the high-precision universal grinding wheel repairing mechanism as described in any one of claims 1 to 6 on one side of the grinding wheel of the grinding machine; making the diamond pen (7) so that the pen tip is located at the center of the arc guide rail; Step 2, rotating the bevel gear knob (4) to make the axis of the diamond pen (7) perpendicular to the horizontal axis of the grinding wheel; feeding the grinding machine along the Y axis to make the outer cylindrical surface of the grinding wheel contact with the diamond pen tip, while feeding along the X axis to flatten the outer cylindrical surface of the grinding wheel, and recording the Y axis scale of the grinding machine; wherein the X axis is parallel to the grinding wheel rotation axis, the Y axis is perpendicular to the X axis, and the Y axis and the X axis are both located in the horizontal plane; Step 3, rotating the bevel gear knob (4) to make the axis of the diamond pen (7) parallel to the X-axis, feeding the X-axis of the grinder so that the side of the grinding wheel contacts the diamond pen tip, and feeding along the Y-axis at the same time to flatten the side of the grinding wheel; the X-axis of the grinder remains unchanged, and the Y-axis of the grinder is moved back to the recorded Y-axis scale of the grinder. At this time, the diamond pen tip and the sharp point of the side surface flattened by the grinding wheel are at the center of the arc guide at the same time; Step 4: Turn the bevel gear knob (4) to move the axis of the diamond pen (7) to a position where the angle with the grinding wheel axis is 45°, feed the diamond pen (7) with a total feed amount of R and a single feed amount of 0.1 mm to 0.2 mm, and at the same time, slide the diamond pen (7) along the arc guide rail (3) to perform arc trimming on the sharp corner of the grinding wheel.

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