CN111390217A - Batch boring method for precision holes - Google Patents
Batch boring method for precision holes Download PDFInfo
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- CN111390217A CN111390217A CN202010295359.1A CN202010295359A CN111390217A CN 111390217 A CN111390217 A CN 111390217A CN 202010295359 A CN202010295359 A CN 202010295359A CN 111390217 A CN111390217 A CN 111390217A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B35/00—Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods
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Abstract
The invention discloses a batch boring method of precision holes, which comprises the following steps: 1. boring a trial cut hole with the same aperture as the initial hole of the part on the trial cut block; 2. boring a hole at the upper end of the trial cut hole by a boring cutter with the bore diameter larger than the final hole diameter of the part; 3. measuring the bore diameter of the bore, reducing the bore diameter of the boring cutter according to the deviation between the bore diameter of the bore and the final bore diameter of the part, and then descending the boring cutter to continue boring; 4. repeating the step 3 until the bore diameter is equal to the final hole diameter of the part, and numbering the current boring cutter according to the initial hole diameter, the final hole diameter and the part material of the part and storing the current boring cutter in a tool magazine; 5. during boring processing, a boring cutter with a corresponding number is called according to the material of the part, the aperture of the initial hole and the aperture of the final hole to bore the part; 6. step 5 is repeated to bore the holes in batches; the boring cutter adjusting device has the advantages of avoiding adjusting the position of the boring cutter in the machining process and effectively improving the stability and efficiency of batch boring.
Description
Technical Field
The invention belongs to the technical field of boring processing, and particularly relates to a batch boring method for precision holes.
Background
Because the clamping coaxiality tolerance between the cutter and the cutter sleeve is large, the diameter is larger than 30 mm, and the cost of the nonstandard customized reamer with the diameter is too high, the high-precision hole is machined in a boring mode instead of reaming.
The current boring method comprises the following steps: 1. boring trial cut holes with the same allowance as the part outside the part by using a boring cutter with the diameter larger than the diameter of the initial hole of the part and smaller than the diameter of the final hole of the part; 2. reducing the diameter of the boring cutter, measuring the diameter of the test boring hole, and recording the diameter increase A1 of the boring cutter and the diameter increase B1 of the test boring hole at the moment; 3. according to the direct proportional relation, obtaining the diameter increase A2 of the boring cutter according to the amount B2 to be bored at the moment; 4. evenly dividing A2 into N parts A3 which is not similar to A1, and boring trial boring holes for N times according to the adjustment quantity of the boring cutter A3; 5. checking whether the size of the trial boring hole meets the size requirement of a final hole of a part, and checking the accidental faults such as machine tool faults, serious cutter abrasion and the like; 6. and if the trial boring hole is qualified, boring the part hole according to the boring hole adjusting mode of the trial boring hole.
The limitations of the current boring methods are: in the course of working, bore hole every time and all need artifical adjustment boring cutter diameter many times, the maloperation risk in the adjustment process is great on the one hand, the reliability is low, on the other hand bore hole efficiency also is lower, is not suitable for processing high accuracy hole in batches.
Therefore, the invention discloses a batch boring method for precision holes, which aims at the problems that the diameter of a boring cutter needs to be adjusted for many times in the machining process and the machining efficiency is low in the traditional batch boring method.
Disclosure of Invention
The invention aims to provide a batch boring method of precision holes, which is characterized in that a boring cutter with a boring diameter larger than the diameter of a final hole is adopted at the upper end of a pre-bored trial hole for boring for multiple times, the boring diameter of the boring cutter is reduced according to the deviation of the boring diameter and the diameter of the final hole each time until the boring diameter is equal to the diameter of the final hole, so that the boring cutter corresponds to a workpiece made of the current part material, the diameter of the initial hole and the diameter of the final hole, in the subsequent batch processing process, the boring processing can be directly carried out by only taking the corresponding boring cutter without regulating the position of the boring cutter for multiple times, and the batch boring efficiency is greatly improved.
The invention is realized by the following technical scheme:
a batch boring method for precision holes comprises the following steps:
step 1, boring a trial cut hole with the same aperture as the initial hole of the part on a trial cut block;
step 2, boring a hole at the upper end of the trial cut hole by selecting a boring cutter with the bore diameter larger than the final hole diameter of the part;
step 3, measuring the bore diameter of the bore, reducing the bore diameter of the boring cutter according to the deviation between the bore diameter of the bore and the final bore diameter of the part, and then descending the boring cutter to continue the bore;
step 4, repeating the step 3 until the bore diameter is equal to the final hole aperture of the part, and numbering the current boring cutter according to the initial hole aperture, the final hole aperture and the part material of the part and storing the current boring cutter in a tool magazine;
step 5, calling boring cutters with corresponding numbers according to the part material, the initial hole aperture and the final hole aperture during boring processing to perform boring processing on the part;
and 6, repeating the step 5, and boring the precision holes with the same part material, initial hole diameter and final hole diameter in batch.
In order to better implement the invention, further, the bore diameter of the boring cutter in the step 3 is reduced by 70% -90% of the deviation between the bore diameter of the bore and the final bore diameter of the part.
In order to avoid that the final boring error is larger due to the machining error of the machine tool when the boring diameter is directly reduced to the final hole diameter, the reduction amount of the boring diameter is controlled to be 70% -90% of the deviation between the current boring diameter and the final hole diameter, and the precision of the boring diameter is conveniently and effectively controlled.
In order to better realize the invention, the descending height of the boring cutter in the step 3 is 3mm-5 mm.
In order to better implement the method, the difference between the bore diameter of the boring cutter in the step 2 and the final hole diameter of the part is 0.2mm-0.5 mm.
In order to better implement the invention, further, the steps 1 to 3 are performed only once for the same boring cutter, and the same boring cutter is not separated from the cutter sleeve in the boring process until the boring cutter is damaged.
In order to better implement the invention, further, the difference between the initial hole diameter of the part and the final hole diameter of the part is 1 mm.
In order to better implement the invention, further, the tolerance between the aperture of the trial cutting hole in the step 1 and the initial hole aperture of the part is within +/-0.2 mm.
According to the part material, the aperture of the initial hole and the aperture of the final hole in the boring process, selecting a boring cutter with the boring diameter larger than the diameter of the final hole, boring for multiple times at the upper end of the initial hole, measuring the deviation between the boring diameter and the aperture of the final hole after each boring, and then gradually reducing the boring diameter of the boring cutter according to the deviation between the boring diameter and the aperture of the final hole until the boring diameter is equal to the diameter of the final hole. The diameter of the boring cutter of the current boring cutter can correspond to the diameter of the corresponding part material, the initial hole aperture and the final hole aperture, the boring cutter with the corresponding number can be directly taken to directly bore in large batches when the same part material, the initial hole aperture and the final hole aperture are subsequently machined in large batches after the current boring cutter is numbered according to the corresponding part material, the initial hole aperture and the final hole aperture, the process that the position of the boring cutter needs to be adjusted for many times in the boring machining process is avoided, and the machining stability and the machining efficiency are greatly improved.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the invention pre-bores trial cut holes with the same aperture as the initial hole on the trial cut block, then uses a boring cutter with the bore diameter larger than the final hole aperture to bore holes at the upper end of the trial cut holes for a plurality of times, and after each time of bore hole, gradually reducing the bore diameter of the boring cutter according to the deviation between the current bore diameter and the final hole aperture until the bore diameter is equal to the final hole aperture, the current boring cutter can be made to correspond to the parts to be processed of the current part material, the initial hole aperture and the final hole aperture, then the boring cutters are numbered according to the part material, the initial hole aperture and the final hole aperture, in subsequent batch boring operation, the batch boring can be directly carried out only by taking the corresponding boring cutters according to the corresponding part materials, the initial hole aperture and the final hole aperture, and the positions of the boring cutters are not required to be adjusted in the machining process, so that the stability and the efficiency of batch boring are greatly improved.
Drawings
FIG. 1 is a flow chart of the operation of the present invention;
fig. 2 is a schematic bore view.
Detailed Description
Example 1:
the method for boring the precision holes in batch according to the embodiment includes the following steps as shown in fig. 1:
step 1, boring a trial cut hole with the same aperture as the initial hole of the part on a trial cut block;
step 2, boring a hole at the upper end of the trial cut hole by selecting a boring cutter with the bore diameter larger than the final hole diameter of the part;
step 3, measuring the bore diameter of the bore, reducing the bore diameter of the boring cutter according to the deviation between the bore diameter of the bore and the final bore diameter of the part, and then descending the boring cutter to continue the bore;
step 4, repeating the step 3 until the bore diameter is equal to the final hole aperture of the part, and numbering the current boring cutter according to the initial hole aperture, the final hole aperture and the part material of the part and storing the current boring cutter in a tool magazine;
step 5, calling boring cutters with corresponding numbers according to the part material, the initial hole aperture and the final hole aperture during boring processing to perform boring processing on the part;
and 6, repeating the step 5, and boring the precision holes with the same part material, initial hole diameter and final hole diameter in batch.
A trial cutting hole with the same aperture as the initial hole of the part is bored in the trial cutting block, and meanwhile, the difference value of the aperture of the initial hole and the aperture of the final hole, namely the allowance to be bored is unilateral 1mm, so that the problem that the ratio of boring surface quality is poor due to the fact that the boring allowance is too large and allowance deviation is too high due to the fact that the boring allowance is too small is avoided. Meanwhile, the allowance deviation is not more than +/-0.2 mm, so that different boring forces and final hole aperture out-of-tolerance caused by different boring allowances are avoided.
As shown in fig. 2, a proper boring cutter is selected according to the aperture of the final hole and is installed in the cutter sleeve, the diameter of the boring cutter is adjusted to be slightly larger than the diameter of the final hole of the part by 0.2-0.5 mm, and then the current boring cutter is used for boring the upper end of the trial cut hole. And after the primary boring is finished, measuring the bore diameter, reducing the bore diameter of the boring cutter according to the deviation of the bore diameter and the final hole diameter of the part, wherein the reduction of the bore diameter of the boring cutter every time is 70% -90% of the deviation of the bore diameter and the final hole diameter of the part, the height of the boring cutter lowered in each boring is 3-5 mm, and continuously boring the upper end of the trial cutting hole according to the adjusting step until the bore diameter is consistent with the final hole diameter.
And after the bore diameter is consistent with the final hole aperture, indicating that the current boring cutter corresponds to the current part material, the initial hole aperture and the final hole aperture, numbering the current boring cutter in a numerical control machine tool according to the part material, the initial hole aperture and the final hole aperture, and storing the current boring cutter in a tool magazine to finish the cutter preparation process.
When the batch boring operation is carried out, the boring cutters with corresponding numbers are taken according to the material of the part to be machined, the aperture of the initial hole and the aperture of the final hole and are installed in a machine tool, then the new trial cut block is trial-bored by the taken boring cutters to be qualified, the current boring cutter can be used for boring the hole of the part, and then the steps are repeated, so that the simultaneous boring of the batch precision hole is realized. And after the machining is finished, taking down the boring cutter and the cutter sleeve from the machine tool integrally and storing the boring cutter and the cutter sleeve into a cutter magazine. For parts to be machined of different part materials, initial hole apertures and final hole apertures, only pre-prepared boring cutters are selected according to the corresponding part materials, initial hole apertures and final hole apertures, then batch boring machining can be carried out through the corresponding boring cutters, the boring cutters do not need to be adjusted in the machining process, and stability and efficiency of batch boring machining of parts of the same type are greatly improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (7)
1. A batch boring method of precision holes is characterized by comprising the following steps:
step 1, boring a trial cut hole with the same aperture as the initial hole of the part on a trial cut block;
step 2, boring a hole at the upper end of the trial cut hole by selecting a boring cutter with the bore diameter larger than the final hole diameter of the part;
step 3, measuring the bore diameter of the bore, reducing the bore diameter of the boring cutter according to the deviation between the bore diameter of the bore and the final bore diameter of the part, and then descending the boring cutter to continue the bore;
step 4, repeating the step 3 until the bore diameter is equal to the final hole aperture of the part, and numbering the current boring cutter according to the initial hole aperture, the final hole aperture and the part material of the part and storing the current boring cutter in a tool magazine;
step 5, calling boring cutters with corresponding numbers according to the part material, the initial hole aperture and the final hole aperture during boring processing to perform boring processing on the part;
and 6, repeating the step 5 to realize batch boring of precision holes with the same part material, initial hole diameter and final hole diameter.
2. The method for batch boring of precision holes according to claim 1, wherein the bore diameter of the boring tool in step 3 is reduced by 70-90% of the deviation between the bore diameter of the bore and the final hole diameter of the part.
3. The method for batch boring of precision holes according to claim 1 or 2, wherein the height of the boring tool lowered in step 3 is 3mm to 5 mm.
4. The method for boring the precision hole in the batch according to the claim 1 or 2, wherein the difference between the bore diameter of the boring cutter and the final hole diameter of the part in the step 2 is 0.2mm-0.5 mm.
5. The method for batch boring of precision holes according to claim 1, wherein the steps 1 to 3 are performed only once for the same boring tool, and the same boring tool is not separated from the tool sleeve during the boring process until the boring tool is damaged.
6. The method as claimed in claim 1, wherein the difference between the initial hole diameter of the part and the final hole diameter of the part is 1 mm.
7. The method for batch boring of precision holes according to claim 1, wherein the tolerance between the hole diameter of the trial cut hole in step 1 and the hole diameter of the initial hole of the part is within ± 0.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010295359.1A CN111390217B (en) | 2020-04-15 | 2020-04-15 | Batch boring method for precision holes |
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| CN202010295359.1A CN111390217B (en) | 2020-04-15 | 2020-04-15 | Batch boring method for precision holes |
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| CN111390217B CN111390217B (en) | 2021-08-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112658301A (en) * | 2020-12-31 | 2021-04-16 | 菏泽广信船配油嘴油泵有限公司 | Accurately-adjustable boring clamp holder and inner and outer circle boring process |
| CN113182547A (en) * | 2021-03-31 | 2021-07-30 | 成都飞机工业（集团）有限责任公司 | Boring machining method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112658301A (en) * | 2020-12-31 | 2021-04-16 | 菏泽广信船配油嘴油泵有限公司 | Accurately-adjustable boring clamp holder and inner and outer circle boring process |
| CN113182547A (en) * | 2021-03-31 | 2021-07-30 | 成都飞机工业（集团）有限责任公司 | Boring machining method |
| CN113182547B (en) * | 2021-03-31 | 2022-05-10 | 成都飞机工业（集团）有限责任公司 | Boring machining method |
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| CN111390217B (en) | 2021-08-03 |
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