CN111408983A - Method for polishing arc surface of connecting rod - Google Patents
Method for polishing arc surface of connecting rod Download PDFInfo
- Publication number
- CN111408983A CN111408983A CN202010410519.2A CN202010410519A CN111408983A CN 111408983 A CN111408983 A CN 111408983A CN 202010410519 A CN202010410519 A CN 202010410519A CN 111408983 A CN111408983 A CN 111408983A
- Authority
- CN
- China
- Prior art keywords
- connecting rod
- arc surface
- polishing
- hinge
- workpiece
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/16—Machines or devices using grinding or polishing belts; Accessories therefor for grinding other surfaces of particular shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/18—Accessories
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B21/00—Machines or devices using grinding or polishing belts; Accessories therefor
- B24B21/18—Accessories
- B24B21/20—Accessories for controlling or adjusting the tracking or the tension of the grinding belt
Abstract
The invention provides a method for polishing a circular arc surface of a connecting rod, which comprises the following steps: s1, fixing the connecting rod workpiece, placing the arc surface of the connecting rod to be polished upwards, wherein the included angle of the arc surface of the connecting rod is larger than 180 degrees; s2, lifting the position of the polishing belt to position the polishing belt on the arc surface of the connecting rod; s3, clamping polishing belts on two sides of the arc surface of the connecting rod at the transition position of the arc surface of the connecting rod and the rod part of the connecting rod, enabling the polishing belts to be tightly attached to the whole arc surface of the connecting rod workpiece to be polished, enabling the end points of the polishing belts and the arc surface of the connecting rod workpiece to be in a tangent relation, and ensuring that the stress of the polishing belts and the arc surface of the connecting rod workpiece is consistent; and S4, operating the polishing belt to polish the arc surface of the connecting rod. The method provided by the invention can realize the polishing of the outer surface of the arc of the connecting rod with an included angle of more than 180 degrees, has the advantages of high processing efficiency, high polishing precision, time and labor saving, wide application range and capability of realizing the polishing of a wider arc surface.
Description
The application is a divisional application of a method and a device for polishing a circular arc surface of a connecting rod, and the application date is as follows: 2019.8.19, application number: 201910762841.9.
Technical Field
The invention relates to a method for polishing a circular arc surface of a connecting rod, belonging to the technical field of machining.
Background
The connecting rod is a member connecting the piston and the crankshaft, and functions to convert the reciprocating motion of the piston into the rotational motion of the crankshaft and to transmit the force acting on the piston to the crankshaft to output power. The stress condition of the connecting rod is complex in work, and the connecting rod is under the action of alternating tensile stress and alternating pressure stress and also under the action of bending stress. Because of the complex stress condition of the connecting rod, strict requirements are imposed on the precision of the connecting rod shape.
The requirements on roundness and roughness of the outer surface of the arc of the big end of the connecting rod are high, and the roughness of the outer surface of the arc of the big end of the connecting rod produced by the company is very strict and is required to be 0.12 micron. The existing polishing method is to add a tool clamp on a milling machine, clamp a connecting rod on the milling machine and polish in a mode of rotating a connecting rod workpiece, and because a product is heavy, and rotation and polishing are controlled manually, the operation is time-consuming and labor-consuming, and the polishing precision is difficult to guarantee. The surface of the special connecting rod workpiece to be polished is not a complete cylindrical surface, but a section of arc surface with an included angle of about 200 degrees, and because the included angle exceeds 180 degrees, part of the arc surface to be polished is positioned below the central line of the big end of the connecting rod, so that the polishing difficulty is high.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the method for polishing the arc surface of the connecting rod, the method can be used for polishing the outer surface of the arc surface of the connecting rod with an included angle of more than 180 degrees, and the method has the advantages of high processing efficiency, high polishing precision, time and labor saving, wide application range and capability of polishing a wider arc surface.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a method for polishing a connecting rod arc surface comprises the following steps:
s1, fixing the connecting rod workpiece, placing the arc surface of the connecting rod to be polished upwards, wherein the included angle of the arc surface of the connecting rod is larger than 180 degrees;
s2, lifting the position of the polishing belt to position the polishing belt on the arc surface of the connecting rod;
s3, clamping polishing belts on two sides of the arc surface of the connecting rod at the transition position of the arc surface of the connecting rod and the rod part of the connecting rod, enabling the polishing belts to be tightly attached to the whole arc surface of the connecting rod workpiece to be polished, enabling the end points of the polishing belts and the arc surface of the connecting rod workpiece to be in a tangent relation, and ensuring that the stress of the polishing belts and the arc surface of the connecting rod workpiece is consistent;
and S4, operating the polishing belt to polish the arc surface of the connecting rod.
The further improvement of the scheme is as follows: when the arc surface of the connecting rod is wider, the method also comprises the following steps:
and S5, moving the polishing belt left and right to enable the polishing belt to uniformly polish the circular arc surface of the whole connecting rod.
According to the technical scheme, the polishing method for the arc surface of the connecting rod can realize polishing of the whole arc surface of the connecting rod only by accurately positioning the top and two end points of the arc surface of the connecting rod, is simple, convenient and efficient, and solves the problem of high polishing difficulty of the outer surface of the arc surface of the connecting rod with an included angle of more than 180 degrees.
Drawings
Fig. 1 is a schematic structural diagram of the device in the working state according to the embodiment of the present invention.
FIG. 2 is a schematic structural diagram of the device in an inoperative state according to the embodiment of the present invention.
Fig. 3 is a schematic view of the internal structure of the hinge clamping mechanism at a in fig. 2.
Fig. 4 is a schematic view of the support before the hinge.
Fig. 5 is a front view of the external structure of the hinge unclamping unit after combination of fig. 3 and 4.
Fig. 6 is a reverse view of the external structure of the hinge unclamping unit of fig. 3 and 4 in combination.
Figure 7 is a schematic view of the hinged clamp in a released condition.
Fig. 8 is a schematic view of the hinge clamp in a clamped state.
In the figure: 1. the automatic polishing machine comprises a base, 2 rapid clamps, 3 driven wheels, 4 polishing belts, 5 polishing mechanism fixing rods, 6 hinge rear supporting bodies, 7 lifting seats, 8 driving wheels, 9 lifting seat guide rails, 10 bearing frames, 11 lifting cylinders, 12 limiting blocks, 13 handles, 14 driven wheel moving seats, 15 connecting rods, 16 polishing belt tensioning cylinders, 17 magnetic switches, 18 motors, 19 balancing weights, 20 connecting rod workpiece arc surface included angles of 200 degrees, 21 baffle plates, 22 guide wheels A, 23 guide wheels B, 24 hinge upper supporting bodies, 25 follow-up pins, 26 cylinder connecting seats, 27 hinge loose clamp cylinders, 28 hinge pins B, 29 hinge clamps, 30 hinge pins A, 31 hinge connecting mandrels, 32 hinge clamp arms, 33 hinge pins C, 34 locking nuts, 35 hinge plates, 36 hinge plate rotating mandrels, 37 hinge loose clamp connecting seats, 38. hinge side support, 39 hinge front support, 101 cross-bar.
Detailed Description
The invention is further illustrated by the following figures and examples.
As shown in fig. 1 to 6, the device for polishing the arc surface of the connecting rod using the method of the present invention includes a lifting unit, a polishing belt operating unit, a hinge releasing and clamping unit, a workpiece fixing unit, and a left-right moving unit. The workpiece in this embodiment is the connecting rod 15, and the arc surface to be polished is an arc surface of the connecting rod, and the included angle of the arc surface is 200 °, as shown by 20 in fig. 7.
The lifting unit comprises a base 1 and a bearing frame 10 arranged above the base, a cross rod 101 is arranged in the middle of the top surface of the bearing frame 10, a lifting cylinder 11 of the lifting unit is fixed below the cross rod 101, the air source of the lifting cylinder 11 is controlled by two reversing air sources, namely a three-position five-way manual control valve, a valve core is reversed at one position and three positions, and is closed at two positions. The piston rod below fixedly connected with rectangle frame construction of lift cylinder 11 goes up and down seat 7, vertically along the frame pole on four frame poles of the vertical direction of bearing frame 10 and is provided with lift seat guide rail 9, four corners swing joint of lift seat 7 are on lift seat guide rail 9, and lift cylinder 11 can drive lift seat 7 and can follow lift seat guide rail 9 and slide from top to bottom. The polishing mechanism fixing rod 5 is arranged below the bearing frame 10 and extends to the outside of the bearing frame 10.
The left-right moving unit is arranged below the lifting seat 7 and comprises polishing mechanism slide rails arranged below the front frame rod and the rear frame rod of the lifting seat 7, the polishing mechanism slide rails are grooves arranged below the front frame rod and the rear frame rod of the lifting seat 7, a slide block is arranged on the polishing mechanism fixing rod 5, the upper part of the slide block is positioned in the polishing mechanism slide rails, a handle 13 is arranged at the outer end of the polishing mechanism fixing rod, and the handle 13 is operated to enable the polishing mechanism fixing rod 5 to slide along the polishing mechanism slide rails;
the polishing belt operation unit is arranged below the polishing mechanism fixing rod 5 and comprises a three-phase asynchronous motor 18 arranged below the inner section of the polishing mechanism fixing rod 5, a driving wheel 8 is mounted on an output shaft of the motor, a balancing weight 19 is arranged at the tail part of the inner section of the polishing mechanism fixing rod 5 behind the motor 18, a sliding rail is arranged below the outer section of the polishing mechanism fixing rod 5, a sliding block is arranged on a driven wheel moving seat 14 and is positioned in the sliding rail and can slide along the sliding rail, a fixing shaft is connected to the lower part of the driven wheel moving seat 14, one end of the fixing shaft is fixedly connected with the driven wheel moving seat 14 through a bolt, the other end of the fixing shaft is fixedly connected with a circular baffle, a hollow driven wheel 3 is mounted between the baffle 21 and the driven wheel moving; the upper portion of the driven wheel moving seat 14 is connected with a piston rod of a polishing belt elastic air cylinder 16, the polishing belt elastic air cylinder 16 is fixed on a driving wheel 8 and a polishing mechanism fixing rod 5 between driven wheels 3, a magnetic switch 17 is arranged at the tail of the polishing belt elastic air cylinder 16, an air source of the polishing belt elastic air cylinder 16 is a single-path air source, only the piston rod of the polishing belt elastic air cylinder extends out of one path of air source, and the air source is controlled by a manual air valve.
The hinge loosening unit is arranged in the middle of a fixed rod 5 of the polishing mechanism, and comprises a hinge loosening air cylinder 27 arranged above a tightening air cylinder 16 of the polishing belt, an air source of the hinge loosening air cylinder 27 is controlled by two reversing air sources, namely two-position five-way single-head electromagnetic control valves, when a magnetic switch 17 is switched on, an electromagnetic control valve of the linkage hinge loosening air cylinder 27 is switched on, the hinge loosening air cylinder 27 is fixed on an upper hinge support body 24 through two air cylinder connecting seats 26 of a n-shaped frame structure, the polishing mechanism fixed rod 5 passes through a movable plate connecting seat 26 between the two air cylinder connecting seats 26, an upper hinge support body 24 is fixed below the fixed rod 5 of the polishing mechanism, a front hinge support body 39 and a rear hinge support body 6 are arranged below the upper hinge support body 24 of the hinge, the front hinge support body is similar to a concave shape, two convex parts and middle concave positions of the concave plate are arc-shaped, two sides of the front and rear hinge support body are respectively provided with hinge side support bodies 38, a mandrel side support body 38 is fixed on a rear hinge support body 6, the front hinge support body 39 is fixed on two hinge side support bodies 38, the hinge support body 38 is fixed on the hinge support body 35, the hinge support body 35, the hinge support body 38, the hinge support body is connected with a hinge support body 35 through a hinge, the hinge support body 35, the hinge support body is connected with a hinge support body 35, the hinge support body is connected with a hinge, the hinge support body, the hinge support body 35, the hinge support body 35 is connected with the hinge, the hinge support body is connected with the hinge support body, the hinge support body 35 is connected with the hinge support body 35, the hinge support body 35 is connected with the hinge support body.
The workpiece fixing unit comprises two quick clamps 2 arranged on the fixed seat 1 and a limiting block 12.
The position of a piston rod of the lifting cylinder extending out of the lower limit position is a positioning point of the hinge loose clamp unit descending to the upper surface of the workpiece. The hinge jaw is clamped in place, namely the hinge loose clamp cylinder 27 piston rod extends to the position limited by the cylinder body, and at the moment, the polishing belt 4 passes through the guide wheel A22 to reach the end point of the arc surface of the connecting rod workpiece 15 in a tangent relation, so that the polishing belt 4 is ensured to be stressed the same as the arc surface to be polished, and the polishing high-precision requirement is met.
The working principle of the device of the embodiment is as follows: firstly, hoisting a connecting rod 15, placing the connecting rod on a base 1, tightly leaning against a limiting block 12, and then pulling two quick clamps 2 to clamp a connecting rod workpiece 15; rotating the movable plate 35 to clamp the clamping groove on the movable plate 35 into the front end of the follow-up pin 25, screwing the locking nut 34, opening the total air source, controlling one path of air source, which is ahead of the piston rod of the polishing belt elastic cylinder 16, to be opened, wherein the path of air source is in an open state in other time except when the polishing belt 4 needs to be replaced, and the polishing belt 4 is always in a tight state; opening an air source valve extending downwards from a piston rod of a lifting cylinder 11 to enable the piston rod of the lifting cylinder 11 to extend out, driving a lifting seat 7 to descend by the piston rod of the lifting cylinder, driving a polishing mechanism fixing rod 5 to descend by the lifting seat 7, and enabling a polishing belt 4 to be in contact with the arc surface of a connecting rod workpiece 15 in the descending process, and enabling the piston rod of a polishing belt tightening cylinder 16 to contract under stress to keep the polishing belt 4 in a tightening state all the time; when the piston rod of the lifting cylinder 11 extends to the lower limit point, the piston rod can be positioned on the surface to be processed of the connecting rod workpiece 15, and the magnetic switch 17 on the tail of the polishing belt elastic cylinder 16 is switched on; the magnetic switch 17 is switched on to enable a piston rod of a hinge loose clamping air cylinder 27 clamped by the linkage hinge to extend out, the force of the extension of the piston rod of the hinge loose clamping air cylinder downwards presses the follow-up pin 25 through a hinge loose clamping connecting seat 37, the follow-up pin 25 moves downwards along strip-shaped holes in front and rear supporting bodies of the hinge, the follow-up pin 25 drives a hinge tong arm 32, and the hinge tong arm 32 drives a hinge tong 29 to rotate along a pin shaft A30 to clamp the hinge; the position where the hinge is clamped in place is the position where the polishing belt 4 is tangent to the end point of the arc surface of the connecting rod workpiece 15, and the stress of the polishing belt 4 and the arc contact surface to be polished is the same under the state; starting the motor 18, slowly rotating the motor 18 under the action of the frequency converter, then increasing the speed to reach a constant speed, driving the driving wheel 8 to rotate by the output shaft of the motor, driving the driven wheel 3 to rotate by the driving wheel 8, so that the polishing belts 4 arranged on the driving wheel 8 and the driven wheel 3 rotate to finish polishing actions, and guiding and friction reducing effects are exerted on the polishing belts 4 by the guide wheel A22 and the guide wheel B23 during rotation; when the arc surface of the connecting rod workpiece 15 is wide, the movable handle 13 can enable the polishing mechanism fixing rod 5 to swing left and right, so that the effect of polishing the whole arc surface is achieved; because the through hole is left between the hinge front support body 39 and the two hinge side support bodies 38, and the driven wheel 3 connected to the driven wheel moving seat 14 is close to the upper part of one side of the baffle 21, the through hole also exists, when the polishing belt 4 needs to be replaced, only the locking nut 34 at the front end of the movable plate needs to be loosened, the movable plate 35 is pulled upwards to detach the polishing belt 4, any other parts do not need to be detached, the polishing belt 4 is very convenient to replace, the polishing belt 4 is a wearing part, and the replacement is needed frequently, a large amount of manpower and material resources are saved by the structure, and meanwhile, the working efficiency is also improved.
The method for polishing the arc surface of the connecting rod comprises the following specific implementation steps:
s1, the connecting rod 15 is abutted against the limiting block 12 of the device, the two rapid clamps 2 are pulled to clamp the connecting rod, and the arc surface of the connecting rod to be polished is placed upwards;
s2, opening a switch of the lifting cylinder 11 to enable the lifting cylinder 11 to drive the lifting seat 7 and drive the polishing belt operating unit to descend, so that the polishing belt 4 is positioned on the arc surface of the connecting rod;
s3, starting a switch of the hinge loose clamp cylinder 27, driving the hinge loose clamp connecting seat 37 by the hinge clamping cylinder 27 to drive the follow-up pin 25 to move downwards, clamping the polishing belts 4 on two sides of the connecting rod arc surface at the transition position of the connecting rod arc surface and the connecting rod part by the hinge clamp 29, enabling the polishing belts 4 to be tightly attached to the whole arc surface to be polished of the connecting rod 15, enabling end points of the polishing belts 4 and the connecting rod 15 arc surface to be in a tangent relation, and ensuring that the polishing belts 4 and the arc surface of the connecting rod 15 are stressed uniformly;
s4, starting the motor 18, driving the driving wheel 8 to rotate by the motor 18, driving the driven wheel 3 to rotate by the polishing belt 4, and polishing the arc surface of the connecting rod 15 by the polishing belt 4.
S5, operating the handle 13, and moving the polishing mechanism fixing rod 5 left and right to enable the polishing belt 4 to polish the circular arc surface of the whole connecting rod 15 uniformly.
The method for polishing the arc surface of the workpiece has the advantages of simple and convenient operation, time and labor saving and high polishing precision, and can greatly reduce the processing cost of the product and improve the processing efficiency.
Claims (2)
1. A method for polishing a connecting rod arc surface is characterized by comprising the following steps:
s1, fixing the connecting rod workpiece, placing the arc surface of the connecting rod to be polished upwards, wherein the included angle of the arc surface of the connecting rod is larger than 180 degrees;
s2, lifting the position of the polishing belt to position the polishing belt on the arc surface of the connecting rod;
s3, clamping polishing belts on two sides of the arc surface of the connecting rod at the transition position of the arc surface of the connecting rod and the rod part of the connecting rod, enabling the polishing belts to be tightly attached to the whole arc surface of the connecting rod workpiece to be polished, enabling the end points of the polishing belts and the arc surface of the connecting rod workpiece to be in a tangent relation, and ensuring that the stress of the polishing belts and the arc surface of the connecting rod workpiece is consistent;
and S4, operating the polishing belt to polish the arc surface of the connecting rod.
2. The method of polishing a connecting rod arc surface of claim 1, further comprising the steps of, when the connecting rod arc surface is wide:
and S5, moving the polishing belt left and right to enable the polishing belt to uniformly polish the circular arc surface of the whole connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010410519.2A CN111408983B (en) | 2019-08-19 | 2019-08-19 | Method for polishing arc surface of connecting rod |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010410519.2A CN111408983B (en) | 2019-08-19 | 2019-08-19 | Method for polishing arc surface of connecting rod |
| CN201910762841.9A CN110370097B (en) | 2019-08-19 | 2019-08-19 | Device for polishing arc surface of connecting rod |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910762841.9A Division CN110370097B (en) | 2019-08-19 | 2019-08-19 | Device for polishing arc surface of connecting rod |
Publications (2)
| Publication Number | Publication Date |
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| CN111408983A true CN111408983A (en) | 2020-07-14 |
| CN111408983B CN111408983B (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910762841.9A Active CN110370097B (en) | 2019-08-19 | 2019-08-19 | Device for polishing arc surface of connecting rod |
| CN202010410519.2A Active CN111408983B (en) | 2019-08-19 | 2019-08-19 | Method for polishing arc surface of connecting rod |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910762841.9A Active CN110370097B (en) | 2019-08-19 | 2019-08-19 | Device for polishing arc surface of connecting rod |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115042064B (en) * | 2022-08-16 | 2022-11-01 | 徐州旭佩辰机械科技有限公司 | Burnishing device is used in processing of crosshead shoe shaft coupling |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN111408983B (en) | 2022-04-15 |
| CN110370097B (en) | 2020-08-14 |
| CN110370097A (en) | 2019-10-25 |
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