CN101954570B - Method for machining inverse counter bore and chamfer angle by using two-step cutter bar - Google Patents
Method for machining inverse counter bore and chamfer angle by using two-step cutter bar Download PDFInfo
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- CN101954570B CN101954570B CN2010102543254A CN201010254325A CN101954570B CN 101954570 B CN101954570 B CN 101954570B CN 2010102543254 A CN2010102543254 A CN 2010102543254A CN 201010254325 A CN201010254325 A CN 201010254325A CN 101954570 B CN101954570 B CN 101954570B
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Abstract
The invention relates to a method for machining an inverse counter bore and a chamfer angle by using a two-step cutter bar. The method is characterized by comprising the following steps of: machining a phi16 hole with an elongated phi16 milling cutter so as to ensure that a screw thread-locked extension rod can pass through the phi16 hole safely; connecting the screw thread-locked extension rod to a machine tool main shaft of a processing center through a milling chuck and allowing the screw thread-locked extension rod to enter the phi16 hole from the upper end of the phi16 hole on a product; allowing an adjusted heavy boring cutter bar to enter the phi16 hole from the lower end of the phi16 hole, connecting the adjusted heavy boring cutter bar with the screw thread-locked extension rod and locking the cutter bar with a spanner; starting a rough machining program and stopping the main shaft when the machining is finished; and realizing the coaxiality of the boring cutter bar and the screw thread-locked extension rod with the machine tool main shaft through a shaft hole fit clearance of between 0.005 and 0.01 and controlling the error to be phi 0.005, wherein a precision boring hole is formed in the same way as the chamfer angle. Vertical machining equipment is provided and working height is low. Simultaneously, the method has the advantages of simple structure, simple machining process, stable product quality and low machining cost.
Description
Technical field:
The present invention relates to a kind of usefulness two stepwise knife bars and process the processing method of counterbore and chamfering, belong to field of machining, be applicable to single-piece or small serial production.
Background technology:
China No.1 Automobile Group Co technique center trial-production project in 2009: the AV9-CA4GA9 engine wherein has a kind of product: 1009011-62K oil pan, oil pan inner chamber have an elongated hole crosswise, and there are a counterbore and chamfering in the inner, hole.Therefore existence conditions--have only vertical machining centre equipment, workbench was 600 millimeters to the working depth of main shaft, can not satisfy working height at that time, in the processing that does not have under the situation of other suitable equipment just can not to accomplish with common process technology this product.In this case, produced the processing method of on vertical machining centre, processing counterbore and chamfering with two stepwise knife bars.
Summary of the invention:
The object of the present invention is to provide a kind of usefulness two stepwise knife bars to process the processing method of counterbore and chamfering, is a kind of vertical machining centre equipment, and working depth is not high enough, and product is elongated stepped hole and chamfering; The structure that knife bar adopts two stepwise thread lockings to connect, simple in structure, good processing stability; Processing cost is low.
Technical scheme of the present invention is achieved in that the processing method of processing counterbore and chamfering with two stepwise knife bars; It is characterized in that: (1) is at first adjusted φ 22.8 hole heavy borings; Thread locking extension rod and machine tool chief axis are coupled as one; Thread locking extension rod one end and boring cutter bar are connected as one, and the boring cutter bar diameter is 14mm, with product φ 16 holes the 2mm gap are arranged; Cutter head is 4.25mm to knife bar centre distance, uses vernier caliper measurement, makes cutter reach dimensional requirement; The heavy boring procedure of processing is following: (A) at first with lengthening φ 16 milling cutters processing φ 16 holes, can pass through φ 16 holes safely to guarantee the thread locking extension rod; (B) the thread locking extension rod is connected on the machining center machine tool chief axis through milling chuck, gets into φ 16 holes from upper end, product φ 16 holes then; (C) the heavy boring knife bar that will adjust size connects with the thread locking extension rod from entering φ 16 holes, lower end, φ 16 hole then, locks knife bar with spanner; (D) boring cutter bar and the thread locking extension rod axis hole fit clearance through 0.005-0.01mm realizes with machine tool chief axis coaxially, and error φ 0.005; (E) start the roughing program, the completion of processing main shaft stops; Get final product heavy boring φ 22.8 holes to φ 22.5; (2) realize through fine setting fine boring cutter area of bed in right boring φ 22.8 holes; Accomplish fine setting by following method: (A) behind the rough bore, measure the processing aperture size, calculate the actual allowance of right boring through inside meter; (B) change the heavy boring knife bar into tool-bar for accurately boring, tool-bar for accurately boring gets into φ 16 holes from lower end, φ 16 hole and connects with the thread locking extension rod, locks knife bar with spanner, and method of attachment is the same, but the cutter head lock-screw is empty tight, and it can be moved when knocking gently; (C) with the handwheel mode cutter head is got in the rough bore, knock the dynamic cutter head rear end then gently and make point of a knife be adjacent to hole wall; (D) shift out cutter with the handwheel mode, inhale magnetic force dial framework magnet end on workbench, dial gauge table rod end head is pressed on the point of a knife, and the rotation dial plate makes zero pointer; Knocking the dynamic cutter head rear end then lightly makes gauge pressure go into 0.05mm; Examination processing one segment distance is measured aperture size calculating processing surplus, through the said method trimming tool bit, makes it reach the requirement aperture size once more; (E) start the fine finishining program, the completion of processing main shaft stops; Get final product the right boring hole to φ 22.8 (+0.021,0); (3) installation method of rose reamer is the same, starts procedure and gets final product, and does not have adjustment.
Good effect of the present invention is the process that under the situation that processing conditions is restricted, adopts, and is simple in structure, good processing stability, and processing cost is low, is applicable to trial-production or single-piece, small serial production situation.
Description of drawings:
Fig. 1 is a processing structure sketch map of the present invention;
Fig. 2 is a machining tool sketch map of the present invention;
The specific embodiment:
Below in conjunction with accompanying drawing 1,2 and embodiment the present invention is done further description:
Like Fig. 1, shown in 2; 1 is AV9-CA4GA9 engine-oil pan, and oil pan 1 is placed on the clamp for machining 6, and (1) is at first adjusted φ 22.8 hole heavy borings; Thread locking extension rod 2 is coupled as one with machine tool chief axis; Thread locking extension rod 2 one ends and boring cutter bar 3 are connected as one, and boring cutter bar 3 diameters are 14mm, with product φ 16 holes the 2mm gap are arranged; Cutter head 4 is 4.25mm to knife bar centre distance, uses vernier caliper measurement, makes cutter reach dimensional requirement; The heavy boring procedure of processing is following: (A) at first with lengthening φ 16 milling cutters processing φ 16 holes, can pass through φ 16 holes safely to guarantee thread locking extension rod 2; (B) thread locking extension rod 2 is connected on the machining center machine tool chief axis through milling chuck, gets into φ 16 holes from upper end, product φ 16 holes then; (C) the heavy boring knife bar 3 that will adjust size connects with thread locking extension rod 2 from entering φ 16 holes, lower end, φ 16 hole then, locks knife bar with spanner; (D) boring cutter bar 3 and the thread locking extension rod 2 axis hole fit clearance through 0.005-0.01mm realizes with machine tool chief axis coaxially, and error φ 0.005; (E) start the roughing program, the completion of processing main shaft stops; Get final product heavy boring φ 22.8 holes to φ 22.5; (2) realize through fine setting right boring cutter head 4 sizes in right boring φ 22.8 holes; Accomplish fine setting by following method: (A) behind the rough bore, measure the processing aperture size, calculate the actual allowance of right boring through inside meter; (B) change the heavy boring knife bar into tool-bar for accurately boring, tool-bar for accurately boring gets into φ 16 holes from lower end, φ 16 hole and connects with thread locking extension rod 2, locks knife bar with spanner, and method of attachment is the same, but cutter head 4 lock-screws are empty tight, and it can be moved when knocking gently; (C) with the handwheel mode cutter head is got in the rough bore, knock the dynamic cutter head rear end then gently and make point of a knife be adjacent to hole wall; (D) shift out cutter with the handwheel mode, inhale magnetic force dial framework magnet end on workbench, dial gauge table rod end head is pressed on the point of a knife, and the rotation dial plate makes zero pointer; Knocking the dynamic cutter head rear end then lightly makes gauge pressure go into 0.05mm; Examination processing one segment distance is measured aperture size calculating processing surplus, through the said method trimming tool bit, makes it reach the requirement aperture size once more; (E) start the fine finishining program, the completion of processing main shaft stops; Get final product the right boring hole to φ 22.8 (+0.021,0); (3) installation method of rose reamer 5 is the same, starts procedure and gets final product, and does not have adjustment.
Claims (1)
1. process the processing method of counterbore and chamfering with two stepwise knife bars; It is characterized in that: (1) is at first adjusted φ 22.8 hole heavy borings; Thread locking extension rod and machine tool chief axis are coupled as one; Thread locking extension rod one end and boring cutter bar are connected as one, and the boring cutter bar diameter is 14mm, with φ 16 holes the 2mm gap are arranged; Cutter head is 4.25mm to knife bar centre distance, uses vernier caliper measurement, makes cutter reach dimensional requirement; The heavy boring procedure of processing is following: (A) at first with lengthening φ 16 milling cutters processing φ 16 holes, can pass through φ 16 holes safely to guarantee the thread locking extension rod; (B) the thread locking extension rod is connected on the machining center machine tool chief axis through milling chuck, gets into φ 16 holes from upper end, φ 16 holes then; (C) the heavy boring knife bar that will adjust size connects with the thread locking extension rod from entering φ 16 holes, lower end, φ 16 hole then, locks knife bar with spanner; (D) boring cutter bar and the thread locking extension rod axis hole fit clearance through 0.005-0.01mm realizes with machine tool chief axis coaxially, and error φ 0.005; (E) start the roughing program, the completion of processing main shaft stops; Get final product heavy boring φ 22.8 holes to φ 22.5; (2) realize through fine setting fine boring cutter area of bed in right boring φ 22.8 holes; Accomplish fine setting by following method: (A) behind the rough bore, measure the processing aperture size, calculate the actual allowance of right boring through inside meter; (B) change the heavy boring knife bar into tool-bar for accurately boring, tool-bar for accurately boring gets into φ 16 holes from lower end, φ 16 hole and connects with the thread locking extension rod, locks knife bar with spanner, and method of attachment is the same, but the cutter head lock-screw is empty tight, and it can be moved when knocking gently; (C) with the handwheel mode cutter head is got in the rough bore, knock the dynamic cutter head rear end then gently and make point of a knife be adjacent to hole wall; (D) shift out cutter with the handwheel mode, inhale magnetic force dial framework magnet end on workbench, dial gauge table rod end head is pressed on the point of a knife, and the rotation dial plate makes zero pointer; Knocking the dynamic cutter head rear end then lightly makes gauge pressure go into 0.05mm; Examination processing one segment distance is measured aperture size calculating processing surplus, through the said method trimming tool bit, makes it reach the requirement aperture size once more; (E) start the fine finishining program, the completion of processing main shaft stops; Get final product the right boring hole to φ 22.8 (+0.021,0); (3) installation method of rose reamer is the same, starts procedure and gets final product, and does not have adjustment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102543254A CN101954570B (en) | 2010-08-11 | 2010-08-11 | Method for machining inverse counter bore and chamfer angle by using two-step cutter bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102543254A CN101954570B (en) | 2010-08-11 | 2010-08-11 | Method for machining inverse counter bore and chamfer angle by using two-step cutter bar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101954570A CN101954570A (en) | 2011-01-26 |
| CN101954570B true CN101954570B (en) | 2012-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102543254A Expired - Fee Related CN101954570B (en) | 2010-08-11 | 2010-08-11 | Method for machining inverse counter bore and chamfer angle by using two-step cutter bar |
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| CN (1) | CN101954570B (en) |
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| CN110328026A (en) * | 2019-07-16 | 2019-10-15 | 火星人厨具股份有限公司 | A kind of adjustable disintegrating slag knife mounting structure in position |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2030526U (en) * | 1988-05-05 | 1989-01-11 | 北京第二机床厂 | Expanding centering mandrel for folded spring |
| CN1152488A (en) * | 1995-12-22 | 1997-06-25 | 德州机床厂 | Machining method for deep taper hole |
| JP3533650B2 (en) * | 2002-05-31 | 2004-05-31 | ホーコス株式会社 | Drilling control method |
| JP4421979B2 (en) * | 2004-09-08 | 2010-02-24 | 本田金属技術株式会社 | Boring and grooving methods |
| JP4604831B2 (en) * | 2005-05-18 | 2011-01-05 | 日産自動車株式会社 | Hole wall processing method |
| CN101758360B (en) * | 2009-12-11 | 2012-09-12 | 沪东重机有限公司 | Repairing and processing method of main bearing hole on stand of diesel engine for ship |
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| CN101954570A (en) | 2011-01-26 |
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| C14 | Grant of patent or utility model | ||
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| ASS | Succession or assignment of patent right |
Owner name: YUNJIA GROUP CO., LTD. Free format text: FORMER OWNER: YUNDING AUTOMOBILE PARTS SHARE CO., LTD. Effective date: 20150115 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20150115 Address after: 130103 Chaoyang District, Jilin, Silicon Valley street, No. 7999, No. Patentee after: YUN JIA Group Ltd. Address before: 130103 Silicon Valley street, Jilin, Changchun, No. 7999 Patentee before: YUNDING AUTOMOBILE PARTS SHARE Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120222 Termination date: 20210811 |
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| CF01 | Termination of patent right due to non-payment of annual fee |