A honing head circularity device and its usage method

Abstract

The present invention discloses a honing head rubbing device and a method for using the same, including a first honing head rubbing device and a second honing head rubbing device, wherein the first honing head rubbing device is connected to the handle end of the honing head body, and the second honing head rubbing device is connected to the tail end of the honing head body; the first honing head rubbing device includes a body, the body is a tubular structure as a whole, and a core shaft is provided at the center of the right side; a plurality of waist holes are provided on the middle outer wall of the body, and corresponding to the waist holes, a support assembly is distributed, and the support assembly includes a plurality of pins and a pressure block, and a thread and an open nut are also provided on the middle right outer wall of the body; a plurality of clamping screws are distributed on the left side of the body. The present invention has the advantages of realizing high coaxiality and high precision of rubbing positioning and honing head guide strip.

Description

Technical Field

[0001] The present invention relates to the technical field of honing heads for cylinder bores of cylinder blocks, and specifically relates to a honing head roundness regulating device and a using method thereof. Background Art

[0002] The precision requirements for honing heads used for honing the cylinder bores of diesel engine cylinder blocks are very high, which directly affect the honing precision of the cylinder bores. Therefore, it is necessary to pre-round (grind round) the abrasive strips on the honing head with a grinding wheel on an external grinding machine to ensure the precision of the grinding head. The positioning of the grinding head during rounding on the grinding machine and the expansion adjustment of the abrasive strips are realized through a roundness regulating device, and the roundness regulating device directly affects the roundness precision of the grinding head.

[0003] The currently used devices and methods have the following disadvantages: 1) The two center holes used for positioning the grinding head are fixed and cannot be adjusted to be coaxial with the alloy guide of the grinding head, so the coaxiality between the rounded abrasive strips of the grinding head and the alloy guide is poor, affecting the honing precision; 2) During rounding, the abrasive strip support of the grinding head is tightly clamped against the tension spring, which is unreliable, resulting in the support swinging when the grinding head rotates during rounding, affecting the rounding precision; 3) The expansion adjustment of the abrasive strips is relatively complex and unreliable, with low efficiency and affecting the rounding precision.

[0004] The disclosure of the above background art content is only used to assist in understanding the concept and technical solution of the present invention, and it does not necessarily belong to the prior art of this patent application. Without clear evidence indicating that the above content was publicly available on the filing date of this patent application, the above background art should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0005] The present invention provides a honing head roundness regulating device and a using method thereof that achieve high coaxiality between roundness positioning and grinding head guiding and stable coaxial operation for the above technical problems.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A honing head rounding device, comprising a honing head body, on which a grinding bar bracket is distributed, on which grinding bars are distributed; a plurality of honing head guide bars are axially distributed on the outer wall of the honing head body; a honing head push rod and a honing head push rod sleeve are also distributed in the honing head body, and a honing head contraction spring is distributed at each end of the honing head push rod, and also comprising a first honing head rounding device and a second honing head rounding device, the first honing head rounding device is connected to the handle end of the honing head body, and the second honing head rounding device is connected to the tail end of the honing head body; the first honing head rounding device comprises a body, which is a tubular structure as a whole, and a core shaft is provided at the center of its right side; a honing head rounding device is provided on the core shaft A center hole for a circle, which is loosely matched with the body through a number of adjustment screws; a number of waist holes are opened on the middle outer wall of the body, and a support assembly is distributed corresponding to the waist holes, and the support assembly includes a number of pins and a pressure block, the pins are distributed radially around the pressure block, and the pressure block is correspondingly distributed at the end of the grinding head push rod sleeve; the pin extends out from the waist hole; a guide pin is also distributed in the middle of the pressure block; the guide pin is fixed at the center of the body; a thread and an open nut are also provided on the middle right outer wall of the body; a number of clamping screws are distributed on the left side of the body, and the body is connected to the grinding head body through the clamping screws.

[0008] Furthermore, the second grinding head circumference stabilizing device is composed of an end cover and an end cover adjusting screw; the end cover is also provided with a center hole.

[0009] Furthermore, a locking screw is provided on the open nut.

[0010] The method for using the honing head circumference stabilizing device as described above comprises the following steps:

[0011] (1) Use the runout meter to push the ejector pins at both ends to the center holes of the first grinding head rounding device and the second grinding head rounding device respectively;

[0012] (2) Use a dial indicator or micrometer to hit the grinding head guide bar and rotate the grinding head body;

[0013] (3) Use the adjustment screw and the end cover adjustment screw to adjust the coaxiality according to the reading of the dial indicator or micrometer to obtain high-precision coaxial positioning;

[0014] (4) Twist the open nut to cause the pressure block to push the grinding bar push rod sleeve to expand the grinding bar. After the grinding bar expands to the required level, use the locking screw to lock the open nut, and use the binding wire to tie the grinding bar bracket.

[0015] The beneficial effects of the present invention compared with the prior art are as follows:

[0016] 1) Adjustment is carried out through a center hole with positionable adjustment, and the coaxial position accuracy between the circular gauge positioning and the grinding head guide bar is high.

[0017] 2) By providing a first grinding head circular gauge device, after adjustment, the opening nut can be locked with a locking screw and the grinding bar bracket can be tied with iron wire to ensure that the grinding bar does not swing during circular gauging, further ensuring the accuracy of the grinding bar.

[0018] 3) The grinding bar bracket is expanded with an opening adjustment nut, which applies force to 4 pins at the same time, and the opening adjustment nut is locked with a locking screw. The adjustment is convenient, fast and reliable, which is beneficial to ensuring the circular gauging accuracy. Description of the Drawings

[0019] Figure 1 is a cross-sectional view of the coaxial adjustment of the present invention;

[0020] Figure 2 is a sectional view of the second grinding head circular gauge device of the present invention;

[0021] Figure 3 is a schematic three-dimensional structure diagram of the first grinding head circular gauge device of the present invention;

[0022] Figure 4 is a sectional view of the first grinding head circular gauge device of the present invention;

[0023] Figure 5 is a top view of the first grinding head circular gauge device of the present invention;

[0024] Figure 6 is a top perspective view of the present invention in the direction of one end of the first grinding head circular gauge device. Detailed Embodiment

[0025] A honing head rounding device comprises a honing head body 17, on which a grinding bar bracket is distributed, and on which grinding bars are distributed; a plurality of honing head guide bars 15 are axially distributed on the outer wall of the honing head body through screws 15-1; a honing head push rod 18 and a honing head push rod sleeve 24 are also distributed in the honing head body 17, and honing head contraction springs 22, 23 are distributed at both ends of the honing head push rod 18, and also comprises a first honing head rounding device and a second honing head rounding device, wherein the first honing head rounding device is connected to the handle end of the honing head body, and the second honing head rounding device is connected to the tail end of the honing head body; the first honing head rounding device comprises a body 2, which is a tubular structure as a whole, and a core shaft 1 is provided at the center of its right side; a center hole for honing the honing head is provided on the core shaft 1, which is connected to the core shaft 1 through a plurality of adjustment screws 3 The body 2 is clearance-matched, that is, a plurality of adjustment screws 3 are distributed along the mandrel 1. When in use, the position of the center hole of the mandrel 1 can be controlled by adjusting the adjustment screws 3. A plurality of waist holes 2-1 are provided on the middle outer wall of the body 2. A support assembly is distributed in the corresponding waist holes 2-1. The support assembly includes four pins 6 and a pressure block 7. The pins 6 are distributed radially around the pressure block 7. The pressure block 7 is distributed at the end of the grinding head push rod sleeve 24. The pins 6 extend from the waist holes 2-1. A guide pin 4 is also distributed in the middle of the pressure block 7. The guide pin 4 is fixed at the center of the body 2. A thread and an open nut 5 are also provided on the middle right outer wall of the body. The open nut 5 of this embodiment is also provided with a locking screw 8 for locking the open nut 5. A plurality of clamping screws 9 are distributed on the left side of the body 2. The body is connected to the grinding head body 17 through the clamping screws 9. The second grinding head circumference commensurate device is composed of an end cover 14 and an end cover adjustment screw 13; the end cover 14 is also provided with a center hole 10 and an adjustment screw hole 11. When in use, the end cover 14 is swung and fine-tuned by the end cover adjustment screw 13, thereby achieving fine-tuning of the center hole.

[0026] The method for using the honing head circumference stabilizing device as described above comprises the following steps:

[0027] (1) Use the runout meter to push the ejector pins 12 and 19 at both ends to the center holes of the first grinding head rounding device and the second grinding head rounding device respectively;

[0028] (2) Use a dial indicator 16 or a micrometer to hit the grinding head guide bar 15 and rotate the grinding head body;

[0029] (3) Use the adjustment screw and the end cover adjustment screw to adjust the coaxiality according to the reading of the dial indicator or micrometer to obtain high-precision coaxial positioning;

[0030] (4) Turn the opening nut to cause the pressing block to push the grinding strip push rod sleeve, thereby expanding the grinding strip. After expanding to the required size, use the locking screw to lock the opening nut, and use the binding wires 20, 21 to secure the grinding strip bracket.

[0031] Using the above device and method, it is possible to achieve a high coaxial position accuracy between the two center holes and the grinding head guide bar. At the same time, the expansion of the grinding strip is precisely controllable, and the high stability and accuracy of the grinding head are maintained during operation, meeting the ultra-high precision requirements of the honing head.

Claims

1. A honing head roundness device, comprising a grinding head body, grinding bar brackets are distributed on the grinding head body, and grinding bars are distributed on the grinding bar brackets; a plurality of grinding head guide bars are axially distributed on the outer wall of the grinding head body; a grinding head push rod and a grinding head push rod sleeve are also distributed in the grinding head body, and grinding head compression springs are distributed at both ends of the grinding head push rod, characterized in that: It further includes a first grinding head circularity device and a second grinding head circularity device. The first grinding head circularity device is connected to the shank end of the grinding head body, and the second grinding head circularity device is connected to the tail end of the grinding head body. The first grinding head circularity device includes a body which is integrally in a tubular structure, and a mandrel is provided at the center of its right side. A central hole for circularizing the grinding head is provided on the mandrel, and it is in clearance fit with the body through a number of adjusting screws. A number of waist-shaped holes are formed on the outer wall of the middle part of the body, and a spreading assembly is distributed corresponding to the waist-shaped holes. The spreading assembly includes a number of pins and pressing blocks. The pins are distributed radially around the pressing block, and the pressing blocks are correspondingly distributed at the end of the grinding head push rod sleeve. The pins protrude from the waist-shaped holes. Guide pins are also distributed in the middle of the pressing block. The guide pins are fixed at the center of the body. A thread and a slotted nut are also provided on the outer wall of the middle right side of the body. A number of clamping screws are distributed on the left side of the body, and the body is connected to the grinding head body through the clamping screws.

2. The circularity device for a honing head according to claim 1, wherein: The second grinding head circularity device consists of an end cover and end cover adjusting screws. A central hole is also provided on the end cover.

3. The roundness device for a honing head according to claim 2, characterized in that: A locking screw is also provided on the slotted nut.

4. A method for using a honing head roundness device as described in claim 3, characterized in that, It includes the following steps: (1) Using a yaw meter, respectively push the center pins at both ends into the central holes of the first grinding head circularity device and the second grinding head circularity device. (2) Using a dial indicator or a micrometer, place it on the grinding head guide bar and rotate the grinding head body. (3) According to the readings of the dial indicator or the micrometer, use the adjusting screws and the end cover adjusting screws to adjust the coaxiality to obtain high-precision coaxial positioning. (4) Turn the slotted nut to cause the pressing block to push the grinding bar push rod sleeve so that the grinding bar expands. After expanding to the required degree, use the locking screw to lock the slotted nut, and use binding wire to fix the grinding bar bracket.

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