CN-117620700-B - Rotary disc type engine connecting rod big and small hole processing device

CN117620700BCN 117620700 BCN117620700 BCN 117620700BCN-117620700-B

Abstract

In order to solve the problems of low machining efficiency, difficult material taking or discharging, difficult clamping and positioning and the like in the machining method of the big and small holes of the connecting rod of the engine in the prior art, the invention provides a machining device of the big and small holes of the connecting rod of the disc engine, which comprises a frame, a turntable, a stable mechanism, a clamping mechanism, a drilling and machining combined drilling tool, an upper chamfer combined drilling tool and a lower chamfer combined drilling tool; the machine frame is of a rectangular frame structure, the turntable is disc-shaped and can be rotationally fixed at the geometric center of the working table plate by taking the center of the disc as an axle center, the number of the stabilizing mechanisms is more than three, the circumferences of the stabilizing mechanisms are uniformly distributed on the outer sides of the edges of the turntable, and the number of the clamping mechanisms is six, and the six stations correspond to six stations of loading, drilling, upper chamfering, lower chamfering, cleaning and unloading respectively. The clamping mechanism with the die pressing structure has the beneficial technical effects that drilling and chamfering can be simultaneously carried out, the processing efficiency is improved, and the clamping mechanism with the die pressing structure is accurate and stable in clamping and convenient to charge or discharge.

Inventors

SHENG MINGHE
ZHANG YIPENG
CAO XINWEI
WANG CHANGJUN

Assignees

重庆歇马机械曲轴有限公司

Dates

Publication Date: 20260505
Application Date: 20231228

Claims (3)

1. The processing device for the big and small holes of the connecting rod of the rotary table type engine is characterized by comprising a frame, a rotary table, a stabilizing mechanism, a clamping mechanism, a drilling and processing combined drilling tool, an upper chamfering combined drilling tool and a lower chamfering combined drilling tool; the frame is of a rectangular frame structure, and a working table plate is arranged right above the rectangular frame; the rotary table is disc-shaped, is rotatably fixed on the geometric center of a working table plate by taking the center of the disc as an axle center, is radially provided with grooves with triangular cross sections on the edges of the circumference of the rotary table, is provided with more than three stabilizing mechanisms, is circumferentially and uniformly distributed on the outer sides of the edges of the rotary table, is provided with six clamping mechanisms, is circumferentially and uniformly distributed on the upper surface of the edges of the rotary table and corresponds to six stations of loading, drilling, upper chamfering, lower chamfering, cleaning and unloading respectively, is provided with a combined drilling tool on the working table plate of the drilling station on the outer side of the edges of the rotary table, is provided with a drill bit pointing from top to bottom to the upper part of the clamping mechanism and is coaxial with the axis of the through hole of the clamping mechanism, is provided with the upper chamfering combined drilling tool on the working table plate of the outer side of the rotary table, is provided with the axis of the combined drilling tool pointing from top to the lower part of the clamping mechanism and is coaxial with the axis of the through hole of the clamping mechanism; The stabilizing mechanism comprises a base, a support shaft, rollers and springs, wherein the base is of a U-shaped structure, through holes are formed in two end faces of the U-shaped structure, the support shaft is inserted into the through holes of the base, annular steps are formed in the circumference of the support shaft on the inner side of the front through hole of the base, a hinging seat is arranged at the front end of the support shaft, the rollers are hinged to the front end of the support shaft, the cross section of each roller is semicircular, the springs are sleeved on the outer circle of the support shaft between the front through hole and the rear through hole of the base, the front ends of the springs are propped against the annular steps of the support shaft, and the rollers are pushed to prop against the triangular grooves on the circumferential edge of the turntable; The clamping mechanism is of a die pressing structure and comprises a base plate, a template, support columns, a dovetail groove I, an upper pressing plate, a pushing cylinder, a lower pressing plate and an ejection cylinder, wherein the base plate and the template are rectangular and are fixedly connected into a rectangular frame structure through the support columns arranged between the base plate and the template, a die hole is formed in the middle front portion of the template, the shape and the size of the die hole are matched with those of a connecting rod, the dovetail groove I is formed in two sides of the die hole, the upper pressing plate is a rectangular plate, dovetail seats I are arranged at two ends of the upper pressing plate and are inserted in the dovetail groove I on the template, an upper die cavity is formed in the bottom surface of the upper pressing plate, the shape and the size of the upper die cavity are matched with those of the connecting rod, through holes with the diameter larger than that of the connecting rod are formed in the corresponding positions of the large small holes of the connecting rod, the pushing cylinder is fixed on the rear side of the middle portion of the template, the piston rod end of the piston rod is connected with the middle portion of the rear end of the upper pressing plate, the lower pressing plate is pushed to move forwards and backwards in the dovetail groove I, the shape and the size of the dovetail groove I are matched with the shape of the connecting rod, the upper pressing plate is provided with the outer contour of the connecting rod, the piston is hinged to the large end of the piston is arranged in the corresponding position of the large small hole and the small hole, the small hole is hinged to the small hole and is arranged in the bottom surface of the small hole, and is hinged to the small hole.
2. The disc engine connecting rod big and small hole machining device is characterized in that the drilling combined drilling tool and the upper chamfer combined drilling tool are identical in structure, the difference is only that the angles and the diameters of the drill heads are different, the drilling combined drilling tool comprises a base, a dovetail groove II, a dovetail seat II, a combined drill, a cylinder fixing plate and a feed cylinder, the base is L-shaped, the short side of the L-shaped base is fixed on a workbench plate, the dovetail groove II is arranged on the outer side of the long side of the L-shaped base, the dovetail seat II is cuboid and is inserted in the dovetail groove II in a sliding mode, the combined drill is fixed on the back face of the dovetail seat II, the axis of the big drill and the axis of the big through hole of the clamping mechanism are coaxial, the cylinder fixing plate is rectangular and is fixed on the top end of the long side of the L-shaped base, and a piston of the feed cylinder is downwards fixed on the upper surface of the cylinder fixing plate and penetrates through the cylinder fixing plate to be fixedly connected with the upper end face of the combined drill.
3. The disc engine connecting rod big and small hole machining device is characterized in that the lower chamfering combined drilling tool is integrally and inversely fixed on the bottom surface of a workbench plate of a lower chamfering station, the lower chamfering combined drilling tool comprises a support, dovetail grooves III, yan Wei III, combined drilling bits and chamfering cylinders, the support is L-shaped, the short side of the L-shaped support is fixed on the bottom surface of the workbench plate, the dovetail grooves III are formed in the outer side of the long side of the L-shaped base, the dovetail seat III is cuboid and is inserted in the dovetail grooves III in a sliding mode, the combined drilling bits are fixed on the back face of the dovetail seat III, the axis of each big and small drilling bit is coaxial with the axis of each big through hole of a clamping mechanism, and chamfering cylinder pistons are downwards fixed on the upper surface of the workbench plate, and piston ends of the chamfering cylinder pistons penetrate through the workbench plate and are fixedly connected with the upper end faces of the combined drilling bits.

Description

Rotary disc type engine connecting rod big and small hole processing device Technical Field The invention relates to a technology for machining large and small holes of an engine connecting rod, in particular to a device for machining large and small holes of a rotating disc type engine connecting rod. Background The engine connecting rod is a main component of engine transmission torque, and the basic shape of the engine connecting rod is that two ends of a spoon-shaped straight rod are respectively provided with a connecting through hole, wherein one through hole is rotationally connected with the bottom of an engine piston, and the other through hole is rotationally connected with a crank shaft of an engine crankshaft, so that the linear motion of the piston is converted into the circular motion of the crankshaft. In general, the diameter of the through hole connecting the crankshaft is large, and is called a large head hole, the diameter of the through hole connecting the piston is small, and is called a small head hole, and the two are called a large small head hole of the engine connecting rod (see fig. 1). In order to ensure the effective connection of the engine connecting rod, the engine crankshaft and the piston, the shaking or noise is reduced, and the requirements on the size precision, the surface roughness, the position precision and the like of the size hole of the engine connecting rod are higher, in particular to the requirement on the consistency of the hole spacing of the big and small holes. In general, the blank of the engine connecting rod is processed by die forging, and the large small hole of the die-forged connecting rod blank is only a rudiment, and the small hole of the die-forged connecting rod blank can be just a pit on two end faces, but is not penetrated. Therefore, it is necessary to drill a large and small hole of the connecting rod and chamfer both end surfaces of the through hole after the machining. In order to ensure the consistency of the hole spacing of the big and small holes of the engine connecting rod, a combined drill bit is generally adopted to process the big and small holes of the connecting rod, namely, after the connecting rod blank is clamped, the big and small holes are drilled at one time. Then, chamfering is carried out on the two end faces of the big and small holes. Specifically, in the machining method of the connecting rod big and small holes of the engine in the prior art, the connecting rod blank is transversely and vertically clamped, at this time, the axes of the connecting rod blank big and small holes are horizontally arranged in parallel, the axes of the combined drill bit are coaxial with the axes of the connecting rod blank big and small holes, and the combined drill bit for drilling and machining simultaneously drills and machines the connecting rod big and small holes by feeding from the right side of the connecting rod blank (of course, feeding from the left side of the connecting rod blank is also possible). And feeding a combined chamfering bit at the left side of the connecting rod blank, and chamfering the left end face of the large and small holes of the connecting rod. After the chamfering of the left end face is finished, the left chamfering combined drill bit is retracted. At the moment, the right side drilling combined drill bit is replaced by a right side chamfering combined drill bit, and the right side chamfering combined drill bit feeds a cutter to chamfer the right side end face of the large and small hole of the connecting rod. After the chamfering of the right end face is finished, the right chamfering combined drill bit is retracted. The clamping mechanism loosens the connecting rod blank, and the engine connecting rod after the machining is taken away manually or by a mechanical arm, and the connecting rod blank is reloaded to start the machining of the next engine connecting rod. In the machining method of the big and small holes of the engine connecting rod in the prior art, three working procedures of drilling, chamfering the left end face and chamfering the right end face are carried out at the same clamping position, and three times of cutter feeding and cutter retracting are needed during the working procedures, so that the machining efficiency is seriously influenced. In addition, the connecting rod blank is transversely and vertically clamped, so that the material taking or discharging and the clamping and positioning are difficult. Obviously, the processing method of the big and small holes of the engine connecting rod in the prior art has the problems of lower processing efficiency, difficult material taking or discharging, difficult clamping and positioning and the like. Disclosure of Invention The invention provides a device for processing big and small holes of a disk engine connecting rod, which aims to solve the problems of low processing efficiency, difficult material taking or discharging, difficult clam