Engine connecting rod polishing device and process

Abstract

The application relates to the polishing technical field, in particular to an engine connecting rod polishing device and process; the device comprises a burr cutting device and a polishing brush mechanism which are sequentially arranged on a rack; the polishing brush mechanism comprises a polishing shaft and a polishing brush arranged on the polishing shaft; a rotating structure for rotating a floating brush is arranged on the fixed brush; the inner diameter of the floating brush is larger than the diameter of the polishing shaft; and an elastic structure is arranged in the annular gap between the floating brush and the polishing shaft. The polishing device polishes the tooth-shaped joint surface along the tooth width direction; the bristles are arranged along the radial direction of the fixed brush and the floating brush; the bristles cannot contact some areas due to the influence of the tooth top during polishing; and the elastic structure arranged between the floating brush and the polishing shaft makes the floating brush more contact the tooth-shaped joint surface at the end of the bristles, effectively reduces the abrasion of the bristles, and improves the polishing efficiency and the service life of the bristles.

Description

TECHNICAL FIELD

[0001] The application relates to the polishing technical field, in particular to an engine connecting rod polishing device and process. BACKGROUND

[0002] After preliminary machining, the connecting rod has many burrs at the tooth-shaped joint surface, and the burrs need to be removed to ensure reliable connection of the connecting rod.

[0003] Therefore, the applicant applies for an invention patent with the publication number CN119501732A and the name of an engine connecting rod deburring device and method, which comprises a fixing assembly, a tooth-shaped blade, a ceramic fiber brush and a silicon carbide abrasive brush. The connecting rod is fixed on the fixing assembly, the tooth-shaped blade is arranged corresponding to the tooth surface of the connecting rod, the tooth-shaped blade is movably arranged on one side of the fixing assembly through a propelling assembly, the ceramic fiber brush and the silicon carbide abrasive brush are both connected with a rotary driving member, and the ceramic fiber brush and the silicon carbide abrasive brush are installed on a movable arm of a robot through the rotary driving member. The burrs can be removed with high efficiency after the connecting rod is fixed, the manual deburring operation is replaced, the labor intensity is reduced, and the efficiency of the connecting rod machining is improved.

[0004] However, it is found in actual use that the disc-shaped silicon carbide abrasive brush is difficult to completely clean the burrs at the tooth bottom part during rotation, especially the burrs at the tooth bottom far from the rotation direction, and in addition, the bristles of the silicon carbide abrasive brush are severely bent during polishing, and the side of the bristles is severely worn, so that the service life of the silicon carbide abrasive brush is short.

[0005] The utility model patent CN223656764U discloses a brush structure for disc type glass polishing, which comprises a supporting disc, a disc cover, bristle clusters and a floating mechanism. The top end of the supporting disc is provided with a rotating rod connected with a polishing motor, and the bottom end is sealed by the disc cover. The bristle clusters are uniformly distributed in the supporting disc and extend out of work through the pre-set through holes on the disc cover. The floating mechanism is provided with multiple bristle clusters, one end of which is fixed to the top end of the supporting disc, and the other end is fixedly connected with the bristle clusters, allowing the bristle clusters to float up and down and tilt within a certain range. Although the brush structure adopts the floating mechanism to allow the bristle clusters to move up and down and tilt within a certain range, it is still a disc brush and cannot adapt to the polishing of the tooth-shaped joint surface. SUMMARY

[0006] In view of the deficiencies of the prior art, the application provides an engine connecting rod polishing device and process, which improves the polishing efficiency and the service life of the bristles.

[0007] In order to achieve the above object, the present application provides the following technical scheme: a polishing device for engine connecting rod, comprising a burr cutting device and a polishing brush mechanism arranged in sequence on a rack, and a connecting rod conveying mechanism arranged between the burr cutting device and the polishing brush mechanism for conveying the connecting rod;

[0008] The polishing brush mechanism comprises a polishing shaft and a polishing brush arranged on the polishing shaft, the polishing brush comprises a fixed brush and a floating brush, at least one floating brush is arranged on each side of the fixed brush, the fixed brush is coaxially fixed on the polishing shaft, the fixed brush is provided with a rotating structure for driving the floating brush to rotate, the axis of the floating brush is parallel to the axis of the polishing shaft, and the inner diameter of the floating brush is greater than the diameter of the polishing shaft, and an elastic structure is arranged in the annular gap between the floating brush and the polishing shaft.

[0009] The burr on the tooth top is relatively small, the fixed brush is used to contact the tooth top to realize positioning, when the floating brush contacts the helical tooth surface and the tooth bottom of the tooth profile joint surface, the elastic structure can make the floating brush contact the tooth profile joint surface and effectively reduce the bending of the floating brush, so that the floating brush more contacts the tooth profile joint surface through the end of the brush, the wear of the brush is effectively reduced, and the polishing efficiency and the service life of the brush are improved.

[0010] Preferably, the elastic structure is a floating elastic sleeve, the material of the floating elastic sleeve is elastic rubber, and a plurality of deformation holes are formed in the floating elastic sleeve.

[0011] Preferably, the rotating structure is a rotating protrusion arranged on both sides of the fixed brush, a rotating driving groove is formed in the floating brush in the radial direction, and the rotating protrusion is slidingly arranged in the rotating driving groove.

[0012] Preferably, the fixed brush and the floating brush are both provided with ventilation and heat dissipation holes, and a heat dissipation mechanism is arranged on the polishing shaft.

[0013] Preferably, the heat dissipation mechanism comprises heat dissipation blades arranged on both sides of the polishing brush.

[0014] Preferably, the polishing shaft is connected to a polishing motor through a universal joint, the polishing shaft is rotatably arranged on a polishing bearing seat, the polishing bearing seat is liftably arranged on a bearing mounting seat, a floating spring is arranged on the bearing mounting seat to push the polishing bearing seat upward, and the bearing mounting seat is connected to the polishing motor and is driven by a polishing translation motor to move along the axis of the polishing shaft.

[0015] Preferably, the burr cutting device comprises a burr cutting tool, a cutting motor and a lifting mechanism, the burr cutting tool is connected to the cutting motor through a cutting transmission mechanism, the cutting motor and the burr cutting tool are arranged on a cutting fixed base, the cutting fixed base is arranged on the rack in a lifting mode, the lifting mechanism is fixed on the rack, and the lifting mechanism is connected to and drives the cutting fixed base to lift; the rack is provided with a bearing spring for pushing the cutting fixed base upward.

[0016] Preferably, the connecting rod conveying mechanism comprises a first conveying mechanism, a second conveying mechanism and a pushing mechanism, the first conveying mechanism is provided with a supporting block for supporting one end of the connecting rod, the second conveying mechanism is provided with a hanging rod for hanging the other end of the connecting rod, the pushing mechanism is provided with a clamping assembly for clamping the connecting rod, the hanging rod or the supporting block; the supporting block and the rack are further provided with a translation positioning mechanism.

[0017] Preferably, the pushing mechanism is an electric push rod.

[0018] Preferably, the translation positioning mechanism comprises a positioning gear and a positioning rack, the positioning gear is arranged on the supporting block in a rotating mode, the positioning rack is fixed on the rack, and the positioning gear is engaged with the positioning rack.

[0019] The polishing process of the engine connecting rod polishing device comprises the following steps:

[0020] 1) The burr cutting device cuts the burr on the tooth-shaped joint surface of the connecting rod, and the lowermost side of the burr cutting tool of the burr cutting device is spaced apart from the tooth-shaped joint surface by 0.1-0.3 mm;

[0021] 2) The connecting rod conveying mechanism sends the connecting rod to the lower side of the polishing brush mechanism, the polishing shaft drives the fixed brush to rotate, and the fixed brush drives the floating brush to rotate at the same time, the fixed brush is in contact with the tooth top of the tooth-shaped joint surface, the axis of the fixed brush and the floating brush is perpendicular to the tooth width direction of the tooth-shaped joint surface, the polishing brush mechanism and the connecting rod move relative to each other along the tooth width direction, and the fixed brush and the floating brush polish the tooth-shaped joint surface.

[0022] Compared with the prior art, the engine connecting rod polishing device and process have the following beneficial effects: the polishing device changes the original complete polishing of the polishing brush on the tooth-shaped joint surface to polishing along the tooth width direction of the tooth-shaped joint surface, the bristles are arranged along the radial direction of the fixed brush and the floating brush, the bristles will not miss some areas due to the influence of the tooth top during polishing, in addition, the elastic structure arranged between the floating brush and the polishing shaft makes the floating brush more contact the tooth-shaped joint surface at the end of the bristles, effectively reduces the wear of the bristles, and improves the polishing efficiency and the service life of the bristles. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1It is the three-dimensional structure schematic diagram of engine connecting rod polishing device of the application.

[0024] Figure 2 It is the side view of engine connecting rod polishing device of the application.

[0025] Figure 3 It is the perspective view of burr cutting device.

[0026] Figure 4 It is Figure 1 The partial enlarged view at A in the figure.

[0027] Figure 5 It is Figure 2 The partial enlarged view at B in the figure.

[0028] Figure 6 It is the perspective view of polishing brush mechanism.

[0029] Figure 7 It is Figure 6 The partial enlarged view at C in the figure.

[0030] Figure 8 It is the schematic view of fixed brush and floating brush.

[0031] Figure 9 It is the perspective view of connecting rod conveying mechanism.

[0032] Figure 10 It is Figure 9 The partial enlarged view at D in the figure.

[0033] Marked in the drawing: 1, rack; 2, burr cutting device; 3, polishing brush mechanism; 4, connecting rod conveying mechanism; 5, connecting rod;

[0034] 201, cutting fixed seat; 202, burr cutting cutter; 203, cutting motor; 204, synchronous belt structure; 205, bearing spring; 206, lifting motor; 207, crossbeam; 208, lifting guide rod;

[0035] 301, polishing shaft; 302, polishing brush; 303, polishing bearing seat; 304, floating rod; 305, floating spring; 306, bearing mounting seat; 307, universal coupling; 308, heat dissipation blade; 309, polishing motor; 310, polishing translation motor;

[0036] 30201, fixed brush; 30202, floating brush; 30203, floating elastic sleeve; 30204, deformation hole; 30205, ventilation and heat dissipation hole; 30206, rotating protrusion; 30207, rotating driving groove;

[0037] 401, first conveying chain; 402, second conveying chain; 403, electric push rod; 404, block; 405, positioning gear; 406, positioning rack; 407, clamping jaw; 408, clamping cylinder; 409, hanging rod. DETAILED DESCRIPTION

[0038] In order to make the personnel in the technical field better understand the present application scheme, the technical scheme in the embodiment of the present application will be described clearly and completely below in combination with the drawings in the embodiment of the present application. Obviously, the described embodiment is only a part of the embodiment of the present application, not all. Based on the embodiment in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0039] It should be noted that the embodiments in the present application and the features and technical solutions in the embodiments can be combined with each other without conflict.

[0040] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0041] Please refer to Figures 1-2 An engine connecting rod polishing device, comprising a burr cutting device 2 and a polishing brush mechanism 3 arranged in sequence on a rack 1, and a connecting rod conveying mechanism 4 for conveying connecting rods 5 between the burr cutting device 2 and the polishing brush mechanism 3; the burr cutting device 2 preliminarily cuts the burrs on the tooth-shaped joint surface of the connecting rod 5 to remove larger burrs, and then the connecting rod conveying mechanism 4 conveys the connecting rod 5 to a polishing station for polishing the connecting rod 5 by the polishing brush mechanism 3.

[0042] Please refer to Figure 3 The burr cutting device 2 comprises a burr cutting cutter 202, a cutting motor 203 and a lifting mechanism, the burr cutting cutter 202 is connected to the cutting motor 203 through a cutting transmission mechanism, the cutting motor 203 and the burr cutting cutter 202 are arranged on a cutting fixed seat 201, the cutting fixed seat 201 is arranged on the rack 1 in a lifting manner, the lifting mechanism is fixed on the rack 1, and the lifting mechanism is connected to and drives the cutting fixed seat 201 to lift.

[0043] The circumference of the burr cutting cutter 202 is provided with a plurality of cutting edges, the burr cutting cutter 202 cooperates with the tooth-shaped joint surface of the connecting rod 5, and the rotation of the burr cutting cutter 202 realizes the preliminary cutting of the burrs on the tooth-shaped joint surface.

[0044] The cutting transmission mechanism in the embodiment adopts a synchronous belt structure 204, and the cutting motor 203 drives the burr cutting cutter head 202 to rotate through the synchronous belt structure 204. The lifting mechanism includes a lifting motor 206, and the lifting motor 206 is connected to the cutting fixed seat 201 through a screw thread.

[0045] The rack 1 is provided with a bearing spring 205 for pushing the cutting fixed seat 201 upward, the cutting fixed seat 201 is connected to a lifting guide rod 208, the upper end of the lifting guide rod 208 is provided with a cross beam 207, the upper end of the bearing spring 205 is connected to the cross beam 207, and the lower end is fixed relative to the rack 1. The bearing spring 205 is used to reduce the power of the lifting motor 206, and it is easier to realize the accurate lifting of the burr cutting cutter head 202.

[0046] Referring to Figures 4-7 The polishing brush mechanism 3 includes a polishing shaft 301 and a polishing brush 302 arranged on the polishing shaft 301. The polishing shaft 301 is connected to a polishing motor 309 through a universal joint 307. The polishing shaft 301 is rotatably arranged on a polishing bearing seat 303, and the polishing bearing seat 303 is arranged on a bearing mounting seat 306 in a lifting manner. The bearing mounting seat 306 is connected to the polishing motor 309 and has a polishing translation motor 310 for driving the bearing mounting seat 306 to move along the polishing shaft 301 in an axial direction. The polishing translation motor 310 drives the polishing motor 309 and the polishing brush 302 to move in a direction perpendicular to the tooth width direction. The polishing brush 302 can be positioned at a suitable position, and can also be moved during polishing. Each time the polishing brush 302 is moved by a tooth spacing, the polishing effect is better.

[0047] The polishing bearing seat 303 has a large weight, and the polishing bearing seat 303 is easy to press the polishing brush 302 on the tooth-shaped joint surface of the connecting rod 5, which is difficult to achieve the purpose of improving the polishing efficiency and the service life of the brush. In the embodiment, a floating spring 305 is arranged on the bearing mounting seat 306 to push the polishing bearing seat 303 upward. The floating spring 305 can bear most of the weight of the polishing bearing seat 303.

[0048] The upper side of the polishing bearing seat 303 is connected to the bearing mounting seat 306 in a sliding manner through a floating rod 304. The floating spring 305 is arranged on the upper side of the bearing mounting seat 306 to push the floating rod 304 and the polishing bearing seat 303 upward.

[0049] A heat dissipation mechanism is arranged on the polishing shaft 301. Specifically, the heat dissipation mechanism in the embodiment is a heat dissipation blade 308. The heat dissipation blade 308 is arranged on both sides of the polishing brush 302, and the heat dissipation blades 308 on both sides of the polishing brush 302 rotate in the same direction. When the polishing shaft 301 rotates, the heat dissipation blade 308 rotates synchronously. The heat dissipation blade 308 drives air to flow through the polishing brush 302, thereby achieving heat dissipation of the polishing brush 302.

[0050] Referring toFigure 8 The polishing brush 302 comprises a fixed brush 30201 and a floating brush 30202, one floating brush 30202 is arranged on each side of the fixed brush 30201, the fixed brush 30201 is coaxially fixed on the polishing shaft 301, the fixed brush 30201 is provided with a rotating structure for driving the floating brush 30202 to rotate, the axis of the floating brush 30202 is parallel to the axis of the polishing shaft 301, and the inner diameter of the floating brush 30202 is greater than the diameter of the polishing shaft 301, and an elastic structure is arranged in the annular gap between the floating brush 30202 and the polishing shaft 301.

[0051] When the polishing shaft 301 rotates, the fixed brush 30201 rotates synchronously, at the same time, the fixed brush 30201 drives the floating brush 30202 to rotate through the rotating structure, the axis of the fixed brush 30201 is stable, and due to the existence of the elastic structure, the axis of the floating brush 30202 is floating, because the floating brush 30202 generates a large centrifugal force during rotation, when the lower side of the floating brush 30202 contacts the tooth-shaped joint surface of the connecting rod 5, the floating brush 30202 extrudes the elastic structure to deform, the floating brush 30202 is pushed upward, so that the bristles of the floating brush 30202 are prevented from being bent due to extrusion, the side surface of the bristles contacts the tooth-shaped joint surface, and the polishing efficiency can be effectively improved, the polishing effect is improved, and the service life of the bristles is prolonged.

[0052] The elastic structure in the embodiment is a floating elastic sleeve 30203, the material of the floating elastic sleeve 30203 is elastic rubber, and a plurality of deformation holes 30204 are formed in the floating elastic sleeve 30203. Further, the width of one side of the deformation hole 30204 close to the axis is greater than the width of the other side, which is beneficial to deformation.

[0053] The rotating structure is a rotating protrusion 30206 arranged on both sides of the fixed brush 30201, a rotating driving groove 30207 is arranged on the floating brush 30202 in the radial direction, and the rotating protrusion 30206 is slidingly arranged in the rotating driving groove 30207. The fixed brush 30201 and the floating brush 30202 are each provided with a ventilation and heat dissipation hole 30205, the polishing shaft 301 drives the heat dissipation blade 308 to rotate synchronously when rotating, the heat dissipation blade 308 drives air to flow through the ventilation and heat dissipation hole 30205, and heat dissipation of the polishing brush 302 is realized.

[0054] The engine connecting rod polishing device is provided with an air extraction and dust removal device, so as to prevent dust generated in the cutting and polishing process from polluting the environment.

[0055] Referring to Figures 9-10The connecting rod conveying mechanism 4 in the embodiment comprises a first conveying mechanism, a second conveying mechanism and a pushing mechanism, the first conveying mechanism is provided with a supporting block 404 for supporting one end of the connecting rod 5, the second conveying mechanism is provided with a hanging rod 409 for hanging the other end of the connecting rod 5, the supporting block 404 is provided with a groove matched with the one end of the connecting rod 5, and the pushing mechanism is provided with a clamping assembly for clamping the connecting rod 5. The first conveying mechanism and the second conveying mechanism are respectively a first conveying chain 401 and a second conveying chain 402, and the two ends of the first conveying chain 401 and the second conveying chain 402 are connected with sprockets, but the sprockets are all freewheels without power input, and the pushing mechanism conveys the connecting rod 5 on the first conveying chain 401 and the second conveying chain 402 to the next station.

[0056] The reason for using the pushing mechanism to move the connecting rod 5 is that the transmission precision of the chain is poor and the connecting rod 5 cannot be accurately transmitted to the next station. The pushing mechanism in the embodiment is an electric push rod 403, and the clamping assembly is a clamping cylinder 408 arranged on the electric push rod 403 and a clamping jaw 407 fixed on the clamping cylinder 408. The electric push rod 403 and the clamping cylinder 408 realize accurate conveying of the connecting rod 5. In order to ensure the accurate longitudinal position of the connecting rod 5 on the first conveying chain 401 and the second conveying chain 402, a supporting plate (not shown in the figure) is arranged on the lower side of the first conveying chain 401 and the second conveying chain 402.

[0057] When the burr cutting tool disc 202 and the polishing brush 302 process the tooth profile joint surface, the connecting rod 5 will be subjected to force in the tooth width direction. Although the clamping assembly fixes the connecting rod 5, in order to keep the connecting rod 5 more stable, the embodiment further comprises a translation positioning mechanism arranged on the supporting block 404 and the rack 1.

[0058] Specifically, the translation positioning mechanism comprises a positioning gear 405 and a positioning rack 406, the positioning gear 405 is rotationally arranged on the supporting block 404, the positioning rack 406 is fixed on the rack 1, and the positioning gear 405 is engaged with the positioning rack 406. When the pushing mechanism drives the connecting rod 5 to move horizontally, the positioning gear 405 and the positioning rack 406 do not affect the movement of the connecting rod 5, but when the pushing mechanism is fixed, the positioning rack 406 will limit the positioning gear 405 in the tooth width direction, keeping the connecting rod 5 stable. Moreover, the burr cutting tool disc 202 itself has a certain gap when cutting the burr on the tooth profile joint surface, so the positioning gear 405 and the positioning rack 406 can fully meet the processing requirements of the tooth profile joint surface.

[0059] The polishing process of the engine connecting rod polishing device comprises the following steps:

[0060] 1) the burr cutting device 2 cuts the burr on the tooth-shaped joint surface of the connecting rod 5, and the lowermost side of the burr cutting tool disc 202 of the burr cutting device 2 is spaced apart from the tooth-shaped joint surface by 0.1-0.3mm;

[0061] When the connecting rod 5 is conveyed below the burr cutting tool disc 202, the lifting motor drives the cutting fixed seat 201, the cutting motor 203 and the burr cutting tool disc 202 to descend, and then the cutting motor 203 drives the burr cutting tool disc 202 to rotate, so as to preliminarily cut the burr on the tooth-shaped joint surface.

[0062] 2) the connecting rod conveying mechanism 4 sends the connecting rod 5 to the lower side of the polishing brush mechanism 3, the polishing shaft 301 drives the fixed brush 30201 to rotate, and at the same time, the fixed brush 30201 drives the floating brush 30202 to rotate, the fixed brush 30201 is in contact with the tooth top of the tooth-shaped joint surface, the axis of the fixed brush 30201 and the floating brush 30202 is perpendicular to the tooth width direction of the tooth-shaped joint surface, the polishing brush mechanism 3 and the connecting rod 5 move relative to each other along the tooth width direction, and the fixed brush 30201 and the floating brush 30202 polish the tooth-shaped joint surface.

[0063] In other embodiments, the clamping air cylinder 408 and the clamping jaw 407 can also clamp the supporting block 404 or the hanging rod 409.

[0064] In the present application, unless specifically defined and limited otherwise, the terms "mount", "connect", "connection", "fixed", and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. An engine connecting rod polishing apparatus characterized by comprising: The polishing brush mechanism comprises a polishing shaft and polishing brushes arranged on the polishing shaft, the polishing brushes comprise fixed brushes and floating brushes, at least one floating brush is arranged on each side of the fixed brush, the fixed brush is coaxially fixed on the polishing shaft, the fixed brush is provided with a rotating structure for rotating the floating brush, the axis of the floating brush is parallel to the axis of the polishing shaft, and the inner diameter of the floating brush is larger than the diameter of the polishing shaft, and an elastic structure is arranged in the annular gap between the floating brush and the polishing shaft. The elastic structure is a floating elastic sleeve, the material of the floating elastic sleeve is elastic rubber, and a plurality of deformation holes are formed in the floating elastic sleeve. The rotating structure is a rotating protrusion arranged on both sides of the fixed brush, and a rotating driving groove is formed in the floating brush in the radial direction. The polishing shaft is connected to the polishing motor through the universal joint, the polishing shaft is rotatably arranged on a polishing bearing seat, the polishing bearing seat is vertically arranged on a bearing mounting seat, and a floating spring is arranged on the bearing mounting seat to push the polishing bearing seat upward, and the bearing mounting seat is connected to the polishing motor and is driven by the polishing translation motor to move along the axis of the polishing shaft. The fixed brush and the floating brush are provided with ventilation holes, and the polishing shaft is provided with a heat dissipation mechanism.

2. The engine connecting rod polishing apparatus of claim 1 wherein, The heat dissipation mechanism comprises heat dissipation blades arranged on both sides of the polishing brush.

3. The engine connecting rod polishing apparatus of claim 2 wherein, The burr cutting device comprises a burr cutting tool, a cutting motor and a lifting mechanism, the burr cutting tool is connected to the cutting motor through a cutting transmission mechanism, the cutting motor and the burr cutting tool are arranged on a cutting fixed seat, the cutting fixed seat is vertically arranged on the rack, the lifting mechanism is fixed on the rack, and the lifting mechanism is connected to and drives the cutting fixed seat to vertically move; the rack is provided with a bearing spring for pushing the cutting fixed seat upward.

4. The engine connecting rod polishing apparatus of claim 1 wherein, The connecting rod conveying mechanism comprises a first conveying mechanism, a second conveying mechanism and a pushing mechanism, the first conveying mechanism is provided with a supporting block for supporting one end of the connecting rod, the second conveying mechanism is provided with a hanging rod for hanging the other end of the connecting rod, the pushing mechanism is provided with a clamping assembly for clamping the connecting rod, the hanging rod or the supporting block; the supporting block is further provided with a translation positioning mechanism.

5. The engine connecting rod polishing apparatus of claim 1 wherein, The translation positioning mechanism comprises a positioning gear and a positioning rack, the positioning gear is rotatably arranged on the supporting block, and the positioning rack is fixed on the rack.

6. The engine connecting rod polishing apparatus of claim 5 wherein, The method comprises the following steps:

7. A polishing process using the engine connecting rod polishing apparatus according to claim 1, characterized by, 1) The burr cutting device cuts the burrs on the tooth-shaped joint surface of the connecting rod; 2) The connecting rod conveying mechanism sends the connecting rod to the lower side of the polishing brush mechanism, the polishing shaft drives the fixed brush to rotate, the fixed brush drives the floating brush to rotate, the fixed brush is in contact with the tooth top of the tooth-shaped joint surface, the axes of the fixed brush and the floating brush are perpendicular to the tooth width direction of the tooth-shaped joint surface, the polishing brush mechanism and the connecting rod move relative to each other in the tooth width direction, and the fixed brush and the floating brush polish the tooth-shaped joint surface. ​

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