阅读说明：本技术 一种用于汽车阻尼器活塞杆加工的无心磨系统 (Centerless grinding system for machining piston rod of automobile damper ) 是由 梁江海 茅金祥 章炳法 陈国平 屠赛飞 于 2020-06-19 设计创作，主要内容包括：本发明公开了一种用于汽车阻尼器活塞杆加工的无心磨系统,包括自动上料装置、用于对活塞杆无心磨的打磨装置、设于打磨装置左侧一组和右侧二组的三组限位装置、自动下料装置、设于右侧两组限位装置中间用于对打磨后的活塞杆测量的数显百分表；本发明实现自动上下料,下料过程中能够避免活塞相互碰撞,一次完成活塞杆研磨,研磨过程中大大降低活塞杆跳动,提高活塞杆研磨的精度,降低劳动强度,提高加工效率。(The invention discloses a centerless grinding system for machining a piston rod of an automobile damper, which comprises an automatic feeding device, a grinding device for centerless grinding of the piston rod, three groups of limiting devices arranged on one group on the left side and two groups on the right side of the grinding device, an automatic discharging device, and a digital display dial indicator arranged between the two groups of limiting devices on the right side and used for measuring the ground piston rod; the automatic feeding and discharging device disclosed by the invention has the advantages that the automatic feeding and discharging are realized, the pistons can be prevented from colliding with each other in the discharging process, the grinding of the piston rod is completed at one time, the jumping of the piston rod is greatly reduced in the grinding process, the grinding precision of the piston rod is improved, the labor intensity is reduced, and the processing efficiency is improved.)

1. The utility model provides a centerless grinding system for processing of automobile damper piston rod which characterized in that: including automatic feeding device (1), be used for grinding device (2) to the piston rod centerless grinding, locate three stop device of group (3) of a set of and right side two groups in grinding device left side, automatic unloader (4), locate in the middle of two sets of stop device in right side and be used for digital display percentage table (5) to the piston rod after polishing, automatic feeding device (1) includes first mount (11), fixed blowing case (12) of locating on first mount, portable lifter plate (13) of locating on the blowing case that runs through, V type groove (14) of locating on the lifter plate, two first guide bars (15) of fixed lifter plate bottom of locating, cover first movable plate (16) of locating on two first guide bars, upper end rotate locate on the lifter plate and rotate first screw rod (17) of locating on the movable plate, locate first spout (18) on the first mount, The automatic feeding device comprises a first sliding block (19) which is fixedly arranged on a first moving plate and movably arranged on a first sliding groove, a first air cylinder (110) used for driving the first sliding block to move, a first spring (111) which is sleeved on a first guide rod and is fixedly arranged at one end of the first moving plate and one end of the first guide rod at two ends respectively, a second air cylinder (112) fixedly arranged on a feeding box, and a first ball (113) rotatably arranged on a telescopic rod of the first air cylinder.

2. The centerless grinding system for machining the piston rod of the automobile damper as claimed in claim 1, wherein: grinding device (2) include second mount (21), fixed first slide rail (22) of locating on the second mount, portable grinding component (23) of locating two sets of symmetries settings on the first slide rail, be located in the middle of two sets of grinding component and fixed a plurality of layer boards (24) of locating on the first slide rail, locate a plurality of telescopic links (25) directly over the push pedal group, rotate second ball (26) of locating the telescopic link bottom, a plurality of layer boards increase in proper order by a left side to the right side, a plurality of telescopic links reduce in proper order by a left side to the right side.

3. The centerless grinding system for machining the piston rod of the automobile damper as claimed in claim 2, wherein: the polishing assembly (23) comprises a first base (231) movably arranged on a first sliding rail, two bearings (232) arranged on the first base, a driving shaft (233) penetrating through the two bearings, a polishing wheel (234) fixedly sleeved on the driving shaft, two groups of stabilizing parts (235) arranged at two ends of the driving shaft, a second screw (236) rotatably arranged on the first base, a first motor (237) for driving the second screw to rotate, a first universal joint (238) fixedly arranged at one end of the driving shaft, a second universal joint (239) movably arranged on the first universal joint, a second motor (240) for driving the second universal joint to rotate, and a second spring (241) with two ends fixedly arranged on the first universal joint and the second universal joint respectively.

4. The centerless grinding system for machining the piston rod of the automobile damper as claimed in claim 3, wherein the centerless grinding system comprises: make emery wheel (234) including wheel body (2341), three groups of emery wheel groups (2342) of fixed cover locating on the wheel body, be equipped with first toper face (2343) and first arcwall face (2344) and first toroidal surface (2345) on emery wheel group (2342), three groups of emery wheel groups are by left side to right external diameter grow in proper order, leave the distance between three groups of emery wheel groups.

5. The centerless grinding system for machining the piston rod of the automobile damper as claimed in claim 3, wherein the centerless grinding system comprises: stabilizing part (235) including fixed cover locate driving epaxial first disk body (2351), fixed locate on the first disk body and fixed cover locate driving epaxial second disk body (2352), be vortex form distribution and rotate a plurality of third ball (2353) of locating on the first disk body, be vortex form distribution and rotate a plurality of fourth ball (2354) of locating on the second disk body, fixed first backup plate (2355) and the second backup plate (2356) of locating on the first base, a plurality of third ball and a plurality of fourth ball crisscross the setting, a plurality of third ball are forward vortex distribution, and a plurality of fourth ball are reverse vortex distribution.

6. The centerless grinding system for machining the piston rod of the automobile damper as claimed in claim 1, wherein: the three groups of limiting devices (3) have the same structure, the two groups of limiting devices on the right side have the same size, the one group of limiting devices on the left side and the two groups of limiting devices on the right side have different sizes, stop device (3) include a plurality of fixed plates (31) of equidistance annular distribution, rotate respectively and locate a plurality of pivots (32) on a plurality of fixed plates, run through simultaneously rotatable a plurality of epaxial rings (33) of rotating of locating, one end is rotated and is located first L type commentaries on classics board (34) and second L type commentaries on classics board (35) of changeing, one end is rotated and is located on first L type commentaries on classics board other end and rotates and locate a plurality of connecting plates (36) on the board is changeed to adjacent epaxial second L type, rotate and locate roller bearing (37) in the middle of the connecting plate, fixed one of them epaxial first gear (38) of locating, second gear (39) with first gear meshing, be used for driving second gear pivoted third motor (310).

7. The centerless grinding system for machining the piston rod of the automobile damper as claimed in claim 1, wherein: the automatic blanking device (4) comprises a third fixing frame (41), a conveying belt (42) arranged on the third fixing frame, a first arc-shaped material discharging plate (43) fixedly arranged on the conveying belt, a plurality of fifth balls (44) which are equidistantly and rotatably arranged at the bottom of the first arc-shaped material discharging plate, a plurality of sixth balls (45) which are positioned at two sides of the fifth balls and rotatably arranged on the first arc-shaped material discharging plate, a second arc-shaped material discharging plate (46) and a third arc-shaped material discharging plate (47) fixedly arranged on the third fixing frame, a second slide rail (48) arranged above the first arc-shaped material discharging plate, a qualified product tray (49) movably arranged on the second slide rail, a unqualified product tray (410) movably arranged above the qualified product tray and movably arranged on the second slide rail, and two groups of toothed belt groups (411) respectively used for driving the qualified product tray and the unqua, the first arc-shaped material discharging plate, the second arc-shaped material discharging plate and the third arc-shaped material discharging plate are on the same axial line; the qualified product tray (49) and the unqualified product tray (410) are identical in structure, and the qualified product tray (49) comprises a tray body (491), a plurality of fourth arc-shaped material placing plates (492) which are fixedly arranged on the tray body at equal intervals, a plurality of fifth arc-shaped material placing plates (493) which are fixedly arranged on the tray body in one-to-one correspondence with the fourth arc-shaped material placing plates, and two racks (494) which are fixedly arranged on the tray body; the toothed belt set (411) comprises a first tensioning roller (412), a second tensioning roller (413), a first toothed belt (414) and a second toothed belt (415) sleeved on the first tensioning roller and the second tensioning roller and a fourth motor (416) used for driving the first tensioning roller to rotate, wherein the first toothed belt and the second toothed belt are respectively meshed with the two racks.

Technical Field

The invention relates to the technical field of chain machining, in particular to a centerless grinding system for machining a piston rod of an automobile damper.

Background

The piston rod of the automobile damper needs to be ground by a centerless grinding machine for multiple times in the machining process, and is turned to a corresponding station for multiple times, so that the labor intensity is increased, the machining efficiency is low, the piston rod can jump in the centerless grinding process due to the fact that the length of the piston rod is long, the grinding precision of the piston rod is affected, and the piston rod can be damaged due to mutual collision in the blanking process.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the centerless grinding system for machining the piston rod of the automobile damper, so that automatic feeding and discharging are realized, the pistons can be prevented from colliding with each other in the blanking process, the grinding of the piston rod is completed at one time, the piston rod jumping is greatly reduced in the grinding process, the grinding precision of the piston rod is improved, the labor intensity is reduced, and the machining efficiency is improved.

In order to achieve the purpose, the invention adopts the following technical scheme: the centerless grinding system comprises an automatic feeding device, a grinding device, three limiting devices, an automatic discharging device and a digital display dial indicator, wherein the grinding device is used for centerless grinding of a piston rod, the three limiting devices are arranged in a group on the left side and a group on the right side of the grinding device, the digital display dial indicator is arranged between the two limiting devices on the right side and used for measuring the piston rod after grinding, the automatic feeding device comprises a first fixing frame, a discharging box fixedly arranged on the first fixing frame, a lifting plate movably penetrating through the discharging box, a V-shaped groove arranged on the lifting plate, two first guide rods fixedly arranged at the bottom end of the lifting plate, a first movable plate sleeved on the two first guide rods, a first screw rod, a first movable plate, a first movable sliding block, a second sliding block and a second sliding block, the first sliding block is fixedly arranged on the first fixing frame, the first sliding block is movably arranged on the, The first cylinder is used for driving the first sliding block to move, the first spring is sleeved on the first guide rod, two ends of the first spring are respectively and fixedly arranged on one end of the first moving plate and one end of the first guide rod, the second cylinder is fixedly arranged on the material discharging box, and the first ball is rotatably arranged on a telescopic rod of the first cylinder; firstly, putting a piston rod raw material into a material placing box, rotating a first screw rod, adjusting the distance between a first movable plate and a lifting plate, driving the first movable plate to move upwards through a first air cylinder, driving the lifting plate to move upwards, enabling the piston rod raw material falling in a V-shaped groove to move upwards and to move to the middle of a limiting device, pushing the piston rod raw material to move towards a polishing device through a second air cylinder, guiding and limiting through the limiting device on the left side of the polishing device in the moving process, enabling the piston rod raw material to be located in the middle of the polishing device, starting the polishing device to polish the piston rod raw material, limiting the piston rod after being ground through two groups of limiting devices on the right side, performing qualification confirmation through a digital display dial indicator, finally performing disc loading treatment on the piston rod through an automatic blanking device, and respectively storing qualified piston; the invention firstly puts the piston rod raw material into a material placing box, adjusts the distance between a first moving plate and a lifting plate by rotating a first screw rod, drives the first moving plate to move upwards by a first air cylinder, drives the lifting plate to move upwards, so that the piston rod raw material falling in a V-shaped groove moves upwards and moves to the middle of a limiting device, can adjust the lifting height of the lifting plate by adjusting the distance between the first moving plate and the lifting plate, can move the first moving plate along the two directions by arranging two first guide rods, generates thrust on the first moving plate by arranging a first spring, improves the fixing effect of the first screw rod, namely, the first screw rod is difficult to rotate after the adjustment is finished by increasing the force of the first screw rod which can rotate, pushes the piston rod raw material to move towards a polishing device by a second air cylinder, finishes the automatic feeding work of the piston rod raw material, is guided and limited by the limiting device on the left side of the polishing device during the movement process, the jumping of the raw material of the piston rod in the polishing process can be avoided, the raw material of the piston rod is positioned in the middle of the polishing device, the polishing device is started to polish the raw material of the piston rod, the grinding of the piston rod can be completed at one time through the grinding device, the piston rod jumping is greatly reduced in the grinding process, the grinding precision of the piston rod is improved, the labor intensity is reduced, the processing efficiency is improved, the ground piston rod is limited by two groups of limiting devices on the right side, namely, the piston rod raw materials at the two ends are limited, so that the problem of jumping in the process of grinding the piston rod raw materials is reduced again, the precision of grinding the piston rod is improved again, and the qualification is confirmed through a digital display dial indicator, and finally the piston rod is subjected to the tray loading treatment through an automatic blanking device, and the qualified piston rods and the unqualified piston rods are respectively stored, and the mutual collision of the piston rods in the blanking process can be avoided through the arrangement.

Grinding device includes the second mount, fixes first slide rail of locating on the second mount, portable polishing assembly who locates two sets of symmetries settings on the first slide rail, be located in the middle of two sets of polishing assembly and fixed locate a plurality of layer boards on first slide rail, locate a plurality of telescopic links directly over the push pedal group, rotate the second ball of locating the telescopic link bottom, a plurality of layer boards increase in proper order by a left side to the right side, a plurality of telescopic links reduce in proper order by a left side to the right side.

The polishing component comprises a first base movably arranged on a first sliding rail, two bearings arranged on the first base, a driving shaft arranged on the two bearings in a penetrating mode, a polishing wheel fixedly arranged on the driving shaft, two groups of stabilizing parts arranged at two ends of the driving shaft, a second screw rod rotatably arranged on the first base, a first motor used for driving the second screw rod to rotate, a first universal joint fixedly arranged at one end of the driving shaft, a second universal joint movably arranged on the first universal joint, a second motor used for driving the second universal joint to rotate, and second springs fixedly arranged at two ends of the second universal joint.

The grinding wheel includes wheel body, fixed three groups of sand wheelsets of locating on the wheel body, be equipped with first toper face and first arcwall face and first annular face on the sand wheelset, three groups of sand wheelsets are by left side to right external diameter grow in proper order, leave the distance between three groups of sand wheelsets.

The stabilizing part comprises a first disk body fixedly arranged on the driving shaft, a second disk body fixedly arranged on the first disk body and fixedly arranged on the driving shaft, a plurality of third balls distributed and rotated on the first disk body in a vortex manner, a plurality of fourth balls distributed and rotated on the second disk body in a vortex manner, a first backup plate and a second backup plate fixedly arranged on the first base, wherein the plurality of third balls and the plurality of fourth balls are arranged in a staggered manner, the plurality of third balls are distributed in a forward vortex manner, and the plurality of fourth balls are distributed in a reverse vortex manner.

The stop device structure of three groups is the same, two sets of stop device size on right side are the same, a set of stop device on left side is different with two sets of stop device size on right side, stop device includes a plurality of fixed plates that equidistance annular distributes, rotate respectively and locate a plurality of pivots on a plurality of fixed plates, run through the rotatable ring of locating a plurality of pivots simultaneously, one end is rotated and is located first L type commentaries on classics board and second L type commentaries on classics board of changeing epaxial, one end is rotated and is located on the first L type commentaries on classics board other end and rotates and locate a plurality of connecting plates on the adjacent epaxial second L type commentaries on classics board, rotate and locate the roller bearing in the middle of the connecting plate, fixed locate one of them epaxial first gear that rotates, the second gear with first gear.

The automatic blanking device comprises a third fixing frame, a conveying belt arranged on the third fixing frame, a first arc-shaped discharging plate fixedly arranged on the conveying belt, a plurality of fifth balls which are equidistantly and rotatably arranged at the bottom of the first arc-shaped discharging plate, a plurality of sixth balls which are positioned on two sides of the fifth balls and rotatably arranged on the first arc-shaped discharging plate, a second arc-shaped discharging plate and a third arc-shaped discharging plate which are fixedly arranged on the third fixing frame, a second slide rail arranged above the first arc-shaped discharging plate, a qualified product tray movably arranged on the second slide rail, a defective product tray movably arranged on the second slide rail above the qualified product tray, and two groups of toothed belt groups respectively used for driving the qualified product tray and the defective product tray to move, wherein the first arc-shaped discharging plate, the second arc-shaped discharging plate and the third arc-shaped discharging plate are arranged on the same axial line; the qualified product tray and the unqualified product tray have the same structure, and the qualified product tray comprises a tray body, a plurality of fourth arc-shaped discharging plates which are fixedly arranged on the tray body at equal intervals, a plurality of fifth arc-shaped discharging plates which are fixedly arranged on the tray body in a one-to-one correspondence with the fourth arc-shaped discharging plates, and two racks fixedly arranged on the tray body; the toothed belt set comprises a first tensioning roller, a second tensioning roller, a first toothed belt, a second toothed belt and a fourth motor, wherein the first toothed belt and the second toothed belt are sleeved on the first tensioning roller and the second tensioning roller, the fourth motor is used for driving the first tensioning roller to rotate, and the first toothed belt and the second toothed belt are meshed with the two racks respectively.

The invention has the following advantages: the automatic feeding work of the raw materials of the piston rod is completed through the automatic feeding device, the raw materials of the piston rod are guided and limited by the limiting device on the left side of the grinding device in the moving process, the raw materials of the piston rod can be prevented from jumping in the grinding process, the raw materials of the piston rod are positioned in the middle of the grinding device, the grinding device is started to grind the raw materials of the piston rod, the grinding of the piston rod can be completed once through the grinding device, the jumping of the piston rod is greatly reduced in the grinding process, the grinding precision of the piston rod is improved, the labor intensity is reduced, the processing efficiency is improved, the ground piston rod is limited by the two limiting devices on the right side, namely, the raw materials of the piston rod at two ends are limited, the jumping problem in the grinding process of the raw materials of the piston rod is reduced again, the grinding, and the qualified piston rods and the unqualified piston rods are respectively stored, and the mutual collision of the piston rods in the blanking process can be avoided through the arrangement.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a side view of the present invention.

Fig. 3 is a partial structural sectional view taken along line a-a of fig. 2.

Fig. 4 is an enlarged view of fig. 3 at B.

Fig. 5 is a cross-sectional view taken along line B-B of fig. 2.

Fig. 6 is a cross-sectional view taken along line C-C of fig. 2.

Fig. 7 is a schematic front view of the present invention.

Fig. 8 is a cross-sectional view taken along line D-D of fig. 7.

Fig. 9 is a sectional view taken along line H-H in fig. 8.

Fig. 10 is an enlarged view of fig. 9 at C.

Fig. 11 is a structural sectional view taken along line F-F in fig. 8.

Fig. 12 is a structural sectional view taken along line E-E in fig. 8.

Fig. 13 is a sectional view taken along line G-G in fig. 7.

Fig. 14 is an enlarged view of a portion a in fig. 13.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-14, a centerless grinding system for processing a piston rod of an automobile damper comprises an automatic feeding device 1, a grinding device 2 for centerless grinding of the piston rod, three sets of limiting devices 3 arranged on one set on the left side and two sets on the right side of the grinding device, an automatic discharging device 4, a digital display dial indicator 5 arranged between the two sets of limiting devices on the right side and used for measuring the ground piston rod, wherein the automatic feeding device 1 comprises a first fixing frame 11, a discharging box 12 fixedly arranged on the first fixing frame, a lifting plate 13 movably penetrating through the discharging box, a V-shaped groove 14 arranged on the lifting plate, two first guide rods 15 fixedly arranged at the bottom end of the lifting plate, a first moving plate 16 sleeved on the two first guide rods, a first screw 17 with the upper end rotatably arranged on the lifting plate and rotatably arranged on the first moving plate, a first chute 18 arranged on the first fixing frame, a second slide rail 15 arranged on the bottom, The first sliding block 19 is fixedly arranged on the first moving plate and movably arranged on the first sliding groove, the first air cylinder 110 is used for driving the first sliding block to move, the first spring 111 is sleeved on the first guide rod, two ends of the first spring are respectively fixedly arranged on one end of the first moving plate and one end of the first guide rod, the second air cylinder 112 is fixedly arranged on the material discharging box, and the first ball 113 is rotatably arranged on a telescopic rod of the first air cylinder; firstly, a piston rod raw material is put into a material placing box, the distance between a first moving plate and a lifting plate is adjusted by rotating a first screw rod, the first moving plate is driven to move upwards by a first air cylinder to drive the lifting plate to move upwards, so that the piston rod raw material falling in a V-shaped groove moves upwards and moves to the middle of a limiting device, the lifting height of the lifting plate can be adjusted by adjusting the distance between the first moving plate and the lifting plate, the first moving plate can move along the two directions by arranging two first guide rods, the first spring is arranged to generate thrust on the first moving plate, the fixing effect of the first screw rod is improved, namely, the first screw rod is enabled to be difficult to rotate after the adjustment is completed by increasing the force capable of rotating of the first screw rod, the piston rod raw material is pushed by a second air cylinder to move towards a polishing device to complete the automatic feeding work of the piston rod raw material, the piston rod raw material is guided and limited by a, the jumping of the raw material of the piston rod in the polishing process can be avoided, the raw material of the piston rod is positioned in the middle of the polishing device, the polishing device is started to polish the raw material of the piston rod, the grinding of the piston rod can be completed at one time through the grinding device, the piston rod jumping is greatly reduced in the grinding process, the grinding precision of the piston rod is improved, the labor intensity is reduced, the processing efficiency is improved, the ground piston rod is limited by two groups of limiting devices on the right side, namely, the piston rod raw materials at the two ends are limited, so that the problem of jumping in the process of grinding the piston rod raw materials is reduced again, the precision of grinding the piston rod is improved again, and the qualification is confirmed through a digital display dial indicator, and finally the piston rod is subjected to the tray loading treatment through an automatic blanking device, and the qualified piston rods and the unqualified piston rods are respectively stored, and the mutual collision of the piston rods in the blanking process can be avoided through the arrangement.

The polishing device 2 comprises a second fixing frame 21, a first slide rail 22 fixedly arranged on the second fixing frame, two groups of symmetrically arranged polishing assemblies 23 movably arranged on the first slide rail, a plurality of support plates 24 positioned between the two groups of polishing assemblies and fixedly arranged on the first slide rail, a plurality of telescopic rods 25 arranged right above the push plate groups, and a second ball 26 rotatably arranged at the bottom ends of the telescopic rods, wherein the plurality of support plates are sequentially increased from left to right, and the plurality of telescopic rods are sequentially decreased from left to right; adjust the distance between two polishing assemblies earlier, make two polishing assemblies be located relative movement on the first slide rail, restart two polishing assemblies and grind the piston rod raw materials of process, support the piston rod raw materials through a plurality of layer board settings, carry on spacingly to piston rod raw materials upper end through a plurality of telescopic links, it is spacing to carry out around the piston rod raw materials respectively through two polishing assemblies, thereby reduce the problem of beating in the piston rod raw materials grinding process, it can adapt to the continuous external diameter that diminishes of piston rod raw materials grinding in-process to increase the setting in proper order by a left side to the right side through a plurality of layer boards, the same reason is reduced the setting in proper order by a left side to the right side through a plurality of telescopic links and can be adapted to the.

The polishing assembly 23 comprises a first base 231 movably arranged on a first sliding rail, two bearings 232 arranged on the first base, a driving shaft 233 penetrating through the two bearings simultaneously, a polishing wheel 234 fixedly sleeved on the driving shaft, two groups of stabilizing members 235 arranged at two ends of the driving shaft, a second screw 236 rotatably arranged on the first base, a first motor 237 for driving the second screw to rotate, a first universal joint 238 fixedly arranged at one end of the driving shaft, a second universal joint 239 movably arranged on the first universal joint, a second motor 240 for driving the second universal joint to rotate, and a second spring 241 with two ends respectively fixedly arranged on the first universal joint and the second universal joint; rotate through first motor drive second screw rod, make first base remove along first slide rail, rethread second motor drive second universal joint rotates, make first universal joint and then rotate, thereby make the driving shaft rotate, finally make the wheel of polishing rotate, through first universal joint and second universal joint second spring setting can greatly reduced second motor produce the transmission of vibration, reduce the vibrations of driving shaft promptly, improve the stability of polishing wheel, improve the precision of grinding, first base and driving shaft above it can remove when making the second motor rigid through first universal joint and second universal joint, first base and driving shaft above it move the in-process messenger first universal joint and second universal joint relative movement.

The grinding wheel 234 comprises a wheel body 2341 and three groups of grinding wheel groups 2342 fixedly sleeved on the wheel body, wherein the grinding wheel groups 2342 are provided with a first conical surface 2343, a first arc-shaped surface 2344 and a first annular surface 2345, the outer diameters of the three groups of grinding wheel groups become larger from left to right, and distances are reserved among the three groups of grinding wheel groups; carry out the chamfer through first conical surface to piston rod one end earlier and handle, improve area of contact and carry on spacingly to its tip, can make the better linking of first conical surface and first annular face through first arcwall face, grind the piston rod through first annular face, can progressively grind the piston rod through three sand wheelset settings of group, make the piston rod form a plurality of steps in the grinding process, greatly reduced the beating in the piston rod grinding process, can reduce the beating in the grinding process again through grinding its terminal surface chamfer simultaneously, and improve grinding efficiency, leave washing and cooling of distance in the piston rod grinding process of being convenient for between three sand wheelsets of group, the piece repeated grinding after avoiding grinding influences the surface smoothness of piston rod.

The stabilizing part 235 comprises a first disc body 2351 fixedly arranged on the driving shaft in a fixing way, a second disc body 2352 fixedly arranged on the first disc body and fixedly arranged on the driving shaft in a fixing way, a plurality of third balls 2353 rotatably arranged on the first disc body in a vortex-shaped distribution way, a plurality of fourth balls 2354 rotatably arranged on the second disc body in a vortex-shaped distribution way, a first backup plate 2355 and a second backup plate 2356 fixedly arranged on the first base, wherein the plurality of third balls and the plurality of fourth balls are arranged in a staggered way, the plurality of third balls are distributed in a forward vortex way, and the plurality of fourth balls are distributed in a reverse vortex way; the driving shaft rotates the in-process and drives first disk body and second disk body and rotate together, makes a plurality of third balls and fourth ball on first disk body and the second disk body rotate together, makes a plurality of third balls and fourth ball be located first backup plate and second backup plate and roll, a plurality of third balls and a plurality of fourth ball crisscross the setting, a plurality of third balls are the positive vortex distribution of revolving, and a plurality of fourth balls are the anti-vortex distribution of revolving, make first disk body and second disk body rotate the in-process more steadily and improve the rotation effect, prolonged the distance of third ball and fourth ball to driving shaft axle center gradually, make stability higher, stabilize the both ends of driving shaft respectively through two sets of stabilizing assemblies, improved the stability of driving shaft rotation in-process once more.

The three groups of limiting devices 3 have the same structure, the two groups of limiting devices on the right side have the same size, the one group of limiting devices on the left side and the two groups of limiting devices on the right side have different sizes, each limiting device 3 comprises a plurality of fixing plates 31 which are distributed in an equidistant annular manner, a plurality of rotating shafts 32 which are respectively and rotatably arranged on the plurality of fixing plates, circular rings 33 which simultaneously penetrate through the plurality of rotating shafts in a rotatable manner, a first L-shaped rotating plate 34 and a second L-shaped rotating plate 35 which are rotatably arranged on the rotating shafts at one ends, a plurality of connecting plates 36 which are rotatably arranged on the first L-shaped rotating plate at one end and rotatably arranged on the second L-shaped rotating plate on the adjacent rotating shaft at the other end, a rolling shaft 37 which is rotatably arranged in the middle of the connecting plates, a first gear 38 which is fixedly arranged on one of the rotating; the second gear is driven to rotate by a third motor, the second gear is meshed with the first gear, so that the first gear rotates, the first gear is fixedly arranged on one of the rotating shafts, so that the rotating shafts rotate, the first L-shaped rotating plate 34 and the second L-shaped rotating plate 35 which are rotatably arranged on the rotating shafts rotate together, so that the connecting plate rotates, the first L-shaped rotating plate 34 and the second L-shaped rotating plate 35 are positioned on the rotating shafts to rotate in the rotating process of the connecting plate, two ends of the connecting plate respectively rotate with the first L-shaped rotating plate and the second L-shaped rotating plate on the adjacent rotating shafts, a plurality of connecting plates can rotate together, so that the rolling shafts on the connecting plate contact with the outer surface of the piston rod to limit the piston rod in an omnibearing manner, one end of the raw material of the piston rod is limited by one group of limiting devices on the left side, one end of the ground piston rod is limited by two groups, the jumping problem in the grinding process of the piston rod is reduced again, and the precision of the ground piston rod is improved.

The automatic blanking device 4 comprises a third fixing frame 41, a conveying belt 42 arranged on the third fixing frame, a first arc-shaped material placing plate 43 fixedly arranged on the conveying belt, a plurality of fifth balls 44 which are equidistantly and rotatably arranged at the bottom of the first arc-shaped material placing plate, a plurality of sixth balls 45 which are positioned at two sides of the fifth balls and rotatably arranged on the first arc-shaped material placing plate, a second arc-shaped material placing plate 46 and a third arc-shaped material placing plate 47 which are fixedly arranged on the third fixing frame, a second slide rail 48 arranged above the first arc-shaped material placing plate, a qualified product tray 49 movably arranged on the second slide rail, a defective product tray 410 which is positioned above the qualified product tray and movably arranged on the second slide rail, and two groups of toothed belt groups 411 which are respectively used for driving the qualified product tray and the defective product tray to move, the first arc-shaped material discharging plate, the second arc-shaped material discharging plate and the third arc-shaped material discharging plate are on the same axial line; the qualified product tray 49 and the unqualified product tray 410 have the same structure, and the qualified product tray 49 comprises a tray body 491, a plurality of fourth arc-shaped material discharging plates 492 fixedly arranged on the tray body at equal intervals, a plurality of fifth arc-shaped material discharging plates 493 fixedly arranged on the tray body in one-to-one correspondence with the fourth arc-shaped material discharging plates, and two racks 494 fixedly arranged on the tray body; the toothed belt group 411 comprises a first tensioning roller 412, a second tensioning roller 413, a first toothed belt 414 and a second toothed belt 415 sleeved on the first tensioning roller and the second tensioning roller, and a fourth motor 416 for driving the first tensioning roller to rotate, wherein the first toothed belt and the second toothed belt are respectively meshed with two racks; the ground piston rod is firstly detected by a digital display dial indicator, the piston rod is moved to a first arc discharging plate, a second arc discharging plate and a third arc discharging plate after detection is finished, the first arc discharging plate and the piston rod on the first arc discharging plate are driven to move upwards by a conveyor belt, when the digital display dial indicator detects a qualified piston rod, the first arc discharging plate is moved to the position above a qualified product tray, the first arc discharging plate penetrates through the middle of two adjacent fourth arc discharging plates and moves to the position above the tray and stops moving, a first tensioning roller is driven by a fourth motor to rotate, a first toothed belt and a second toothed belt are driven to operate, the first toothed belt and the second toothed belt are respectively meshed with two racks fixed on the qualified product tray, so that the qualified product tray is integrally moved, and the fourth arc discharging plate and the fifth arc discharging plate on the qualified product tray are positioned at two ends of the first arc discharging plate and are positioned below two ends of the first arc discharging plate, the first arc-shaped discharging plate is driven to reset through the conveyor belt, so that piston rods on the first arc-shaped discharging plate are left on the fourth arc-shaped discharging plate and the fifth arc-shaped discharging plate, the conveyor belt drives the first arc-shaped discharging plate to move to the position above the unqualified product tray after the digital display dial indicator detects unqualified piston rods in the same way, the unqualified piston rods are left on the unqualified product tray in the same way and are stored separately, and friction between the piston rods and the first arc-shaped discharging plate can be reduced through the fifth ball and the sixth ball on the first arc-shaped discharging plate; through the arrangement, mutual collision in the blanking process of the piston rod can be guaranteed, and whether the piston rod is qualified or not can be distinguished.

The first motor, the second motor, the third motor and the fourth motor are purchased from the market.