CN212704565U - Drilling tool for internal flange of diesel engine crankshaft - Google Patents
Drilling tool for internal flange of diesel engine crankshaft Download PDFInfo
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- CN212704565U CN212704565U CN202021095212.XU CN202021095212U CN212704565U CN 212704565 U CN212704565 U CN 212704565U CN 202021095212 U CN202021095212 U CN 202021095212U CN 212704565 U CN212704565 U CN 212704565U
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- 238000005553 drilling Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000003754 machining Methods 0.000 abstract description 6
- 238000005520 cutting process Methods 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model discloses a flange drilling frock in diesel engine bent axle, including locating component, jig subassembly, magnetic drill supporting seat and magnetic drill, jig subassembly centre gripping is fixed on twice bent axle benchmark shaft shoulder, and the excircle of flange opposite side including the magnetic drill supporting seat centre gripping is fixed. The magnetic drill is fixed on one side of the magnetic drill support seat facing the free end outer flange in an attracting mode. The drill jig component comprises two semi-ring bodies, the upper semi-ring body and the lower semi-ring body are clamped and fixed on two crankshaft reference shaft shoulders close to the free end outer flange, and the fixed bushing and the fixed drill bushings are fixed on the two semi-ring bodies at intervals respectively. The utility model discloses obviously improve processingquality and machining efficiency, reduced the consumption cost of cutter, reduced processing man-hour. The labor intensity of workers is reduced, and the operation safety is improved.
Description
Technical Field
The utility model relates to a cutting process frock of diesel engine key spare part refers in particular to a drilling frock of a plurality of end face holes on diesel engine bent axle's inner flange, belongs to metal cutting process technical field.
Background
The crankshaft is a key part of the diesel engine for transmitting power, and the quality of the crankshaft directly influences the overall performance and the service life of the diesel engine. Fig. 1 and 2 show a seven-cylinder marine medium speed diesel engine crankshaft of a certain type, the excircle dimension of the coupling end outer flange 10 at the right end head is phi 506g6, the excircle dimension of the inner flange 20 is phi 384, the excircle dimensions of the two crankshaft reference shaft shoulders 103 are phi 285H6, the inner hole of the transmission gear is in transition fit with the two crankshaft reference shaft shoulders 103, the upper part of the right side surface of the inner flange 20 is provided with 1 phi 16H7 positioning pin hole 201, the upper outer edge and the lower outer edge of the right side surface are respectively provided with 8M 16 threaded holes 202, the position of the positioning pin hole 201 is coincident with the phase of the top dead center position line of the seventh cylinder of the crankshaft, and the position degree of the positioning pin hole 201 and the excircle of the two crankshaft reference shaft shoulders 103 is phi 0.05. Of the 8 screw holes 202 with the specification of M16 on the upper part of the right side of the inner flange 20, the phase difference between two adjacent screw holes 202 and between the screw holes 202 and the positioning pin holes 201 is 12.75 degrees, and the 8 screw holes 202 on the lower part of the right side of the inner flange 20 and the 8 screw holes 202 on the upper part of the right side of the inner flange 20 are in central symmetry with the axis of the crankshaft. Because the outer diameter of the outer flange 10 of the connecting end is larger than that of the inner flange 20, the positioning pin holes 201 and the 16 threaded holes 202 on the right side surface of the inner flange cannot be directly machined by a main shaft of a common machine tool.
If the special accessory head is matched with the numerical control machining center, the special accessory head can be used for machining the positioning pin holes and the 16 threaded holes 202, but because the cutting phase angle of the special accessory head is limited, 4 times of changing the stations of the crankshaft are needed to complete the machining of the positioning pin holes and the 16 threaded holes 202. Every time the crankshaft station is changed, a series of auxiliary procedures such as fussy alignment and establishment of a workpiece coordinate system are carried out, so that the machining cost is high, and the production efficiency is low.
SUMMERY OF THE UTILITY MODEL
In order to overcome the above-mentioned not enough, the utility model provides a flange drilling frock in diesel engine bent axle has solved the unable direct drilling of ordinary lathe main shaft, and numerical control machining center not only equipment input cost is high, moreover the processing cost exceeds the problem of ordinary lathe several times.
The utility model discloses a following technical scheme realizes:
a drilling tool for a diesel engine crankshaft inner flange comprises a positioning assembly, a drill jig assembly, a magnetic drill supporting seat and a magnetic drill, wherein the positioning assembly comprises a base and V-shaped blocks which are arranged in pairs, the base is respectively fixed at two ends of a workbench, the V-shaped blocks are respectively fixed on the base, and a first main shaft diameter and a tail end main shaft diameter of a diesel engine crankshaft are respectively supported on the corresponding V-shaped blocks; the drill jig assembly is clamped and fixed on two crankshaft reference shaft shoulders outside one side of the inner flange adjacent to the diameter of the tail end main shaft, and the magnetic drill support seat is clamped and fixed on the outer circle of the other side of the inner flange; the magnetic drill is horizontally arranged, and a magnetic attraction seat of the magnetic drill is fixedly attracted on one side of the magnetic drill supporting seat facing the outer flange of the connecting end; the drill jig assembly comprises two semi-ring bodies, two connecting bolt and nut groups, a fixed bushing, an interchangeable reaming sleeve, an interchangeable rough reaming sleeve, an interchangeable fine reaming sleeve and a plurality of fixed drill sleeves, wherein the two semi-ring bodies are identical in structure, clamping edges respectively extend outwards from two ends of each semi-ring body, the inner circle of each semi-ring body is matched with the excircle of two crankshaft reference shaft shoulders outside one side of the inner flange, and the clamping edges at two ends of the upper semi-ring body and the lower semi-ring body are fixedly clamped through the connecting bolt and nut groups respectively, so that the upper semi-ring body and the lower semi-ring body are clamped and fixed on two crankshaft reference shaft shoulders close to the outer flange at the connecting end; the outer edges of the two semi-ring bodies abutting against one side of the inner flange respectively extend out of a drill bushing fixing ring in the radial direction, and the fixing bush is fixed on the drill bushing fixing ring and corresponds to the position of a positioning pin hole of the inner flange; and the plurality of fixed drill bushings are respectively fixed on the drill bushing fixing rings of the two semi-ring bodies at intervals and are in one-to-one correspondence with the positions of the plurality of threaded holes of the inner flange.
The object of the invention is further achieved by the following technical measures.
Further, the magnetic drill supporting seat comprises two supporting seat semi-ring bodies and two connecting bolt and nut sets, the inner hole axial direction of the two supporting seat semi-ring bodies is provided with a positioning step, the inner circle of the two supporting seat semi-ring bodies is synthesized and is positioned on the other side of the outer circle of the inner flange through the positioning step axial direction, two ends of the upper supporting seat semi-ring body and the lower supporting seat semi-ring body respectively extend outwards to form lug plates, and the lug plates are fixedly connected with the upper supporting seat semi-ring body and the lower supporting seat semi-ring body respectively through the connecting bolt and nut sets.
Furthermore, an axial datum line is engraved on the outer peripheral surface of the drill bushing fixing ring of the upper half ring body, and the axial datum line corresponds to a top dead center datum line on an inner flange on one side of the main shaft diameter at the tail end of the crankshaft of the diesel engine.
Furthermore, the inner circle of the half-ring body is in interference fit with the outer circles of the shaft shoulders of the two crankshafts outside one side of the inner flange.
Furthermore, the position degree of the axis of the fixed bushing relative to the excircle of the crankshaft reference shaft shoulder is phi 0.02.
The utility model discloses convenient to use, positioning accuracy are high, have solved the difficult problem that can't directly process location pinhole and a plurality of screw hole on the diesel engine bent axle inner flange side with ordinary lathe main shaft. Carry out above-mentioned processing with joining in marriage special accessory head at numerical control machining center and need change the bent axle station many times, many times alignment, establish the method of work piece coordinate system and compare, the utility model discloses as long as once fix a position the clamping and just can accomplish the processing of all holes of inner flange terminal surface, processingquality obviously improves, and has improved machining efficiency, has reduced the consumption cost of cutter, has reduced man-hour to the processing cost has been reduced. The novel tool for machining the flange hole system in the diesel engine crankshaft reduces the labor intensity of workers, improves the operation safety and is worthy of popularization.
The advantages and features of the invention will be illustrated and explained by the following non-restrictive description of preferred embodiments, which are given by way of example only with reference to the accompanying drawings.
Drawings
FIG. 1 is a front view of a mid-speed diesel engine crankshaft for a type of seven-cylinder marine application;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a front view of the tool of the present invention mounted on a crankshaft of a diesel engine;
FIG. 4 is an enlarged view of section I of FIG. 3;
fig. 5 is an enlarged sectional view B-B of fig. 3.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the embodiment of the flange drilling in the crankshaft of the medium speed diesel engine for a certain type of seven-cylinder ship.
As shown in fig. 3, the present embodiment includes a positioning assembly 1, a drill jig assembly 2, a magnetic drill support 3 and a magnetic drill 4, the positioning assembly 1 includes a base 11 and V-shaped blocks 12, which are arranged in pairs, the base 11 is fixed on two ends of a workbench 200, the V-shaped blocks 12 are fixed on the base 11, and a first main shaft diameter 101 and a seventh main shaft diameter 107 of a diesel crankshaft 100 are supported on the corresponding V-shaped blocks 12, respectively. The drill jig assembly 2 is clamped and fixed on two crankshaft reference shaft shoulders 103 outside the right side of the inner flange 20 adjacent to the seventh main shaft diameter 107, and the magnetic drill support seat 3 is clamped and fixed on the excircle on the left side of the inner flange 20. The magnetic drill 4 is horizontally arranged, and the magnetic attraction seat 41 is fixedly attracted on the right side of the magnetic drill support seat 3, namely one side facing the outer flange 10 of the connecting end.
As shown in fig. 4 and 5, the drill jig assembly 2 includes two half-rings 21 and two connecting bolt and nut sets 22, as well as a fixed bushing 23, an exchangeable reaming sleeve 24, an exchangeable coarse reaming sleeve 25, an exchangeable fine reaming sleeve 26 and a plurality of fixed drill bushings 27, the two half-rings 21 have the same structure, clamping edges 211 extend outwards from two ends of the half-rings 21 respectively, an inner circle of the half-rings 21 is matched with two outer circles of crankshaft reference shaft shoulders 103 outside the right side of the inner flange 20, the clamping edges 211 at two ends of the upper and lower half-rings 21 are clamped and fixedly connected through the connecting bolt and nut sets 22 respectively, so that the upper and lower half-rings 21 are clamped and fixed on two crankshaft reference shaft shoulders 103 near the connecting end outer flange 10. The outer edges of the two half-ring bodies 21 abutting against the right side of the inner flange 20 respectively extend out of a drill bushing fixing ring 212 in the radial direction, and the fixing bushing 23 is fixed on the drill bushing fixing ring 212 and corresponds to the positioning pin hole 201 of the inner flange 20 in position. The fixed drill bushings 27 are fixed on the drill bushing fixing rings 212 of the two half-rings 21 at intervals and correspond to the 16M 16 threaded holes 202 of the inner flange 20 in position one by one.
Magnetic drill supporting seat 3 includes two supporting seat semicircles 31 and two connecting bolt nut groups 22, the hole axial is equipped with positioning step 311 in two supporting seat semicircles 31, the synthetic interior circle of two supporting seat semicircles 31 is on the left side of flange 20 excircle including positioning step 311 axial positioning, two supporting seat semicircles 31 both ends are outside respectively to extend otic placode 312, otic placode 312 is respectively through two supporting seat semicircles 31 about connecting bolt nut group 22 fixed connection, make two supporting seat semicircles 31 centre gripping fixed on the flange 20 excircle right side including.
Two hemizonids 21 of jig subassembly 2 and two supporting seat hemizonids 31 of magnetic drill supporting seat 3 all adopt about the centre gripping fix the form on diesel engine bent axle 100, be convenient for very much the utility model discloses the quick fixed of drilling frock or demolish fast.
An axial reference line 213 is formed on the outer peripheral surface of the drill bushing fixing ring 212 of the upper half ring body 21, and the axial reference line 213 corresponds to the top dead center reference line 104 of the inner flange 20 on the seventh major axis diameter 107 side of the diesel crankshaft 100 shown in fig. 2, so that the positioning accuracy of the positioning pin hole 201 can be improved.
The inner circle of the semi-ring body 21 is in interference fit with the outer circles of the two crankshaft shaft shoulders 103 outside the right side of the inner flange 20, the interference fit code of the embodiment is N7/h6, and the two semi-ring bodies 21 are ensured to be stably fixed on the crankshaft shaft shoulders 103. The positional accuracy of the positioning pin hole 201 can be improved by setting the axial center of the fixing bush 23 to be phi 0.02 with respect to the outer circumference of the crankshaft reference shoulder 103.
Adopt the utility model discloses the process of drilling diesel engine bent axle inner flange terminal surface hole system as follows:
1) the diesel engine crankshaft 100 is supported on the positioning component 1
As shown in fig. 3, the bases 11 are fixed to both ends of the table 200, and then the V-blocks 12 are supported on the bases 11, respectively, and the first main shaft diameter 101 and the seventh main shaft diameter 107 of the diesel crankshaft 100 are supported on the corresponding V-blocks 12, respectively.
2) Adjusting orientation of diesel engine crankshaft 100
The diesel crankshaft 100 is rotated so that the top dead center reference line 104 marked on the inner flange 20 on the right side of the seventh major axis 107 of the diesel crankshaft 100 is located at the highest point.
3) Installing the drill jig assembly 2
Firstly, mounting the fixed bushings 23 and the 16 fixed drill bushings 27 on the drill bushing fixing rings 212 of the upper and lower semi-ring bodies 21, then vertically closing the two semi-ring bodies 21, and fixedly connecting the clamping edges 211 at two ends of the closed two semi-ring bodies 21 through the connecting bolt and nut groups 22 respectively, so that the two semi-ring bodies 21 are positioned on two crankshaft reference shaft shoulders 103 close to the connecting end flange 104, and the end surfaces of the upper and lower semi-ring bodies 21 are abutted against the right side of the inner flange 20. The jig assembly 2 is rotated so that the axial reference line of the drill bushing retainer ring 212 of the upper half ring body 21 is aligned with the top dead center reference line 104 of the inner flange 20 on the seventh major axis 107 side of the diesel crankshaft. Then, the connecting bolt and nut groups 22 on the clamping edges 21 at the two ends of the upper half ring body 21 and the lower half ring body 21 are respectively screwed down, so that the upper half ring body 21 and the lower half ring body 21 are clamped and fixed on the two crankshaft reference shaft shoulders 103, and finally, the replaceable reaming sleeve 24 is embedded into the fixed bushing 23.
4) Installing a magnetic drill supporting seat 3 and a magnetic drill 4
The inner circle formed by the two supporting seat semi-ring bodies 31 is axially positioned on the outer circle of the inner flange 20 through the positioning step 311, then the lug plates 311 at the two ends of the upper and lower supporting seat semi-ring bodies 31 are fixedly connected through the connecting bolt and nut set 22 respectively, so that the two supporting seat semi-ring bodies 31 are clamped and fixed on the outer circle of the inner flange 20, and then the magnetic attraction seat 41 of the magnetic drill 4 is attracted and fixed on the right side of the magnetic drill supporting seat 3.
5) Drilling 16 threaded holes on the inner flange 20
Installing a threaded hole bottom hole drill bit in a clamping head of a magnetic drill, starting the magnetic drill 4, sequentially extending the threaded hole bottom hole drill bit into each fixed drill bushing 27, and drilling threaded hole bottom holes of the inner flange 20 one by one;
6) drilling, rough reaming and fine reaming for completing positioning pin hole 201
Replacing a positioning pin bottom hole drill bit, wherein the positioning pin bottom hole drill bit extends into the replaceable reaming sleeve 24 to complete drilling of the positioning pin bottom hole of the inner flange 20; and then replacing the reaming bit to complete the reaming of the bottom hole of the positioning pin.
7) Coarse and fine reaming to complete the dowel holes 201
The magnetic drill 4 is dismounted, the replaceable reaming sleeve 24 is taken out, the replaceable coarse reaming sleeve 25 is embedded into the fixed bushing 23, the replaceable coarse reaming sleeve 25 is used for positioning, the replaceable coarse reaming sleeve 25 is taken out after the manual coarse reaming positioning pin hole 201 is used, the replaceable fine reaming sleeve is embedded into the fixed bushing 26, the replaceable fine reaming sleeve 26 is used for positioning, the positioning pin hole 201 is manually and finely reamed, and the positioning pin hole 201 is machined;
8) hand tapping each threaded hole 202
And manually tapping the holes one by one to finish tapping of each threaded hole 202.
In addition to the above embodiments, the present invention can also have other embodiments, and all technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope of the present invention.
Claims (5)
1. A drilling tool for a diesel engine crankshaft inner flange comprises a positioning assembly, wherein the positioning assembly comprises bases and V-shaped blocks which are arranged in pairs, the bases are respectively fixed at two ends of a workbench, the V-shaped blocks are respectively fixed on the bases, and a first main shaft diameter and a tail end main shaft diameter of a diesel engine crankshaft are respectively supported on the corresponding V-shaped blocks; the method is characterized in that: the drill jig assembly is clamped and fixed on two crankshaft reference shaft shoulders outside one side of the inner flange adjacent to the diameter of the tail end spindle, and the magnetic drill support seat is clamped and fixed on the outer circle of the other side of the inner flange; the magnetic drill is horizontally arranged, and a magnetic attraction seat of the magnetic drill is fixedly attracted on one side of the magnetic drill supporting seat facing the outer flange of the connecting end; the drill jig assembly comprises two semi-ring bodies, two connecting bolt and nut groups, a fixed bushing, an interchangeable reaming sleeve, an interchangeable rough reaming sleeve, an interchangeable fine reaming sleeve and a plurality of fixed drill sleeves, wherein the two semi-ring bodies are identical in structure, clamping edges extend outwards from two ends of each semi-ring body respectively, the inner circle of each semi-ring body is matched with the excircle of the two crankshaft reference shaft shoulders outside one side of the inner flange, and the clamping edges at two ends of the upper semi-ring body and the lower semi-ring body are fixedly clamped through the connecting bolt and nut groups respectively, so that the upper semi-ring body and the lower semi-ring body are clamped and fixed on the two crankshaft reference shaft shoulders close to the outer flange; the outer edges of the two semi-ring bodies abutting against one side of the inner flange respectively extend out of a drill bushing fixing ring in the radial direction, and the fixing bush is fixed on the drill bushing fixing ring and corresponds to the position of a positioning pin hole of the inner flange; and the plurality of fixed drill bushings are respectively fixed on the drill bushing fixing rings of the two semi-ring bodies at intervals and are in one-to-one correspondence with the positions of the plurality of threaded holes of the inner flange.
2. The diesel engine crankshaft inner flange drilling tool according to claim 1, characterized in that: the magnetic drill supporting seat comprises two supporting seat semi-ring bodies and two connecting bolt and nut sets, the inner hole axial direction of the two supporting seat semi-ring bodies is provided with a positioning step, the inner circle of the two supporting seat semi-ring bodies is synthesized and is positioned on the other side of the outer circle of the inner flange through the positioning step axial direction, two ends of the upper supporting seat semi-ring body and the lower supporting seat semi-ring body respectively extend outwards to form lug plates, and the lug plates are fixedly connected with the upper supporting seat semi-ring body and the lower supporting seat semi-ring body respectively through the connecting bolt and nut.
3. The diesel engine crankshaft inner flange drilling tool according to claim 1, characterized in that: an axial datum line is engraved on the outer peripheral surface of the drill bushing fixing ring of the upper half ring body, and the axial datum line corresponds to a top dead center datum line on an inner flange on one side of the tail end main shaft diameter of the crankshaft of the diesel engine.
4. The diesel engine crankshaft inner flange drilling tool according to claim 1, characterized in that: the inner circle of the semi-ring body is in interference fit with the outer circles of the shaft shoulders of the two crankshafts outside one side of the inner flange.
5. The diesel engine crankshaft inner flange drilling tool according to claim 1, characterized in that: the position degree of the axis of the fixed bushing relative to the excircle of the crankshaft reference shaft shoulder is phi 0.02.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021095212.XU CN212704565U (en) | 2020-06-15 | 2020-06-15 | Drilling tool for internal flange of diesel engine crankshaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021095212.XU CN212704565U (en) | 2020-06-15 | 2020-06-15 | Drilling tool for internal flange of diesel engine crankshaft |
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| Publication Number | Publication Date |
|---|---|
| CN212704565U true CN212704565U (en) | 2021-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021095212.XU Active CN212704565U (en) | 2020-06-15 | 2020-06-15 | Drilling tool for internal flange of diesel engine crankshaft |
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| Country | Link |
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| CN (1) | CN212704565U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111570869A (en) * | 2020-06-15 | 2020-08-25 | 中船动力有限公司 | Diesel engine crankshaft inner flange drilling tool and method |
| CN116493635A (en) * | 2023-05-09 | 2023-07-28 | 中国石油大学(北京) | A stepped shaft shoulder punching equipment |
-
2020
- 2020-06-15 CN CN202021095212.XU patent/CN212704565U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111570869A (en) * | 2020-06-15 | 2020-08-25 | 中船动力有限公司 | Diesel engine crankshaft inner flange drilling tool and method |
| CN111570869B (en) * | 2020-06-15 | 2025-02-14 | 中船动力有限公司 | Diesel engine crankshaft inner flange drilling tool and method |
| CN116493635A (en) * | 2023-05-09 | 2023-07-28 | 中国石油大学(北京) | A stepped shaft shoulder punching equipment |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 402, Changjiang Road, Zhenjiang City, Jiangsu Province, 212002 Patentee after: China Shipbuilding Power Zhenjiang Co.,Ltd. Address before: 402 Changjiang Road, Runzhou District, Zhenjiang City, Jiangsu Province Patentee before: CSSC MARINE POWER Co.,Ltd. |
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| CP03 | Change of name, title or address |