CN108161348B

CN108161348B - Electric tool shaft and preparation process thereof

Info

Publication number: CN108161348B
Application number: CN201711332028.5A
Authority: CN
Inventors: 裘尧雷
Original assignee: Bosway Precision Industry Ningbo Co Ltd
Current assignee: Bosway Precision Industry (Ningbo) Co., Ltd
Priority date: 2017-12-13
Filing date: 2017-12-13
Publication date: 2019-12-17
Anticipated expiration: 2037-12-13
Also published as: CN108161348A

Abstract

The invention discloses an electric tool shaft and a preparation process thereof, and solves the problems that the coaxiality of the electric tool shaft is low, the structural strength is poor and the production efficiency is low because positioning holes are formed in two ends of the electric tool shaft in the prior art. The technical scheme is characterized in that S1, the electric tool shaft is subjected to quenching and tempering; s2, straightening the electric tool shaft; s3, carrying out rough grinding on the electric tool shaft; s4, carrying out primary turning on the electric tool shaft; s5, turning the electric tool shaft again; s6, carrying out high-frequency heat treatment on the electric tool shaft; s7, fine grinding is carried out on the electric tool shaft, the electric tool shaft is produced by the process, the production efficiency is high, the production cost is low, and meanwhile, the produced electric tool shaft has the characteristics of high coaxiality and structural strength, strong reliability and long service life.

Description

Electric tool shaft and preparation process thereof

Technical Field

the invention relates to the field of electric tool shafts, in particular to an electric tool shaft and a preparation process thereof.

background

The electric tool shaft has the characteristics of relatively small size and high precision, is also called as a precision shaft, a small shaft, a shaft core, a rotor shaft, a pin, a rivet, a guide rod and the like, and is mainly made of carbon steel, stainless steel, copper, aluminum and the like of various materials. And can be widely applied to the fields of motor rotating shafts, various electric tools, automobile industry and the like.

referring to fig. 14, in the production process of the conventional electric tool shaft, positioning holes are formed at two ends of the electric tool shaft for the convenience of turning and grinding, so that the two ends of the shaft can be stably clamped by a lathe and a fixture of a grinding machine, and the production efficiency is improved.

However, in the actual use process, although the production efficiency is improved by the method, the positioning holes are formed in the two ends of the shaft, the positioning holes have extremely high requirements, extremely high concentricity must be guaranteed, otherwise the whole coaxiality of the shaft of the electric tool is affected, and meanwhile, in the actual use process, the positioning holes can reduce the whole structural strength of the shaft and affect the service life and stability of the shaft.

disclosure of Invention

the invention aims to provide an electric tool shaft and a preparation process thereof, and the electric tool shaft has the advantages that positioning holes do not need to be formed at two ends of the electric tool shaft, and the electric tool shaft is high in coaxiality, structural strength, service life and stability.

the technical purpose of the invention is realized by the following technical scheme:

the utility model provides an electric tool shaft, includes solid columniform axis body, the one end of axis body is provided with first spacing section, first spacing section includes first spacing groove, the other end of axis body is provided with the spacing section of second, the spacing section of second includes the second spacing groove, first spacing section is kept away from one side of the spacing section of second is provided with the screw thread section, first spacing section is close to one side of the spacing section of second is provided with first holding ring and second holding ring, first spacing section is kept away from the one end of the spacing section of second is provided with the butt end, the spacing section of second is kept away from the one end of first spacing section is provided with the exposed core.

By adopting the technical scheme, the arrangement of the first limiting section and the first limiting groove as well as the arrangement of the second limiting section and the second limiting groove is convenient for positioning when the electric tool shaft is used, and the stability of the electric tool shaft when the electric tool shaft is used is improved; the arrangement of the first positioning ring and the second positioning ring is convenient for positioning the electric tool shaft during polishing, so that the stability of the electric tool shaft during polishing is improved; the two ends of the electric tool shaft do not need to be provided with positioning holes, so that the hole opening process is reduced, the production cost of the electric tool shaft is reduced, the positioning of the positioning holes is not needed, the coaxiality and the structural strength of the electric tool shaft are improved, and the reliability and the service life of the electric tool shaft are prolonged.

A process for manufacturing an electric tool shaft, comprising:

s1, hardening and tempering the electric tool shaft;

S2, straightening the electric tool shaft;

S3, carrying out rough grinding on the electric tool shaft;

S4, carrying out primary turning on the electric tool shaft;

s5, turning the electric tool shaft again;

S6, carrying out high-frequency heat treatment on the electric tool shaft;

And S7, finely grinding the electric tool shaft.

By adopting the technical scheme, the method has the advantages that,

S1: through quenching and tempering, the strength and the hardness of the electric tool shaft are improved, so that the austenitized workpiece obtains martensite as much as possible, the quenching stress is reduced, the corresponding tissue transformation is ensured, and the toughness and the plasticity of the electric tool shaft are improved;

S2: through straightening treatment, the electric tool shaft can generate defects of bending, wave and the like in the rolling, cooling or transporting process, and through the straightening treatment of the straightening machine, the coaxiality of the electric tool shaft is improved, and the defects of bending, wave and the like are reduced or eliminated;

s3: through rough grinding, preparation is made for turning and balanced allowance is reserved for fine grinding;

S4: forming a first limiting groove, a second limiting groove, a first positioning ring, a second positioning ring, a butt joint end and a clamping end on the electric tool shaft through primary turning so as to clamp the electric tool shaft during fine grinding;

s5: forming a thread section on the shaft of the electric tool by turning again;

S6: by utilizing the electromagnetic induction principle, induced current with high density is generated on the surface of the electric tool shaft, the electric tool shaft is rapidly heated to an austenite state, and then is rapidly cooled to obtain a martensite structure, so that a surface hardening layer with the thickness of 1-2mm can be obtained, and the structural strength, the hardness and the wear resistance of the surface of the electric tool shaft are improved;

S7: through accurate grinding, the coaxiality of the electric tool shaft is improved, and the allowance left after coarse grinding is ground completely, so that the electric tool shaft keeps the same size as the designed electric tool shaft.

preferably, the fine grinding of the electric tool shaft is performed by fine grinding of the electric tool shaft by using a high-frequency grinding machine; the high-frequency grinding machine comprises a grinding machine body, a support arranged above the grinding machine body, a first feeding mechanism arranged on one side of the grinding machine body, a first transferring mechanism matched with the first feeding mechanism, and a first discharging mechanism matched with the first transferring mechanism, wherein the first transferring mechanism comprises a moving assembly and a clamping assembly arranged on the moving assembly, the moving assembly comprises a horizontal moving part capable of driving the clamping assembly to do horizontal motion and a vertical moving part capable of driving the clamping assembly to do vertical motion, the clamping assembly comprises a supporting plate and a first clamping plate, a second clamping plate and an abutting part which are arranged on the supporting plate, a clamping groove matched with the clamping end is formed in the first clamping plate, and a first stop block is arranged on one side, facing the second clamping plate, of the clamping groove, the first stop block is provided with an embedded groove, the bottom of the embedded groove is arc-shaped, one side of the second clamping plate facing the first clamping plate is provided with a containing groove corresponding to the embedded groove, the accommodating groove is matched with the abutting end, one side of the lower part of the second clamping plate facing the first clamping plate is provided with a second stop block corresponding to the first stop block, a blanking port is arranged on one side of the second stop block, the upper surface of the second stop block is a convex cambered surface, the convex cambered surface and the containing groove are just tangent to the peripheral surface of the abutting end, the electric tool shaft can be limited by the clamping of the first clamping plate and the second clamping plate, and move under the butt joint of butt joint board lower part, the second grip block still including install in the first actuating cylinder that drives in the backup pad, first actuating cylinder that drives can be used for driving the second grip block carries out horizontal migration.

By adopting the technical scheme, the first feeding mechanism supplies materials to the first transfer mechanism, the first transfer mechanism clamps the electric tool shaft to be ground to polish the grinding machine body, the polished electric tool shaft is placed on the first discharging mechanism through the first transfer mechanism, discharging and collecting are carried out through the first discharging mechanism, manual operation is completely not needed in the whole process of feeding, transferring, polishing and discharging, and the production efficiency of the electric tool shaft is improved; the arrangement of the moving assembly, the horizontal moving part and the vertical moving part thereof can drive the clamping assembly to move in the horizontal direction and the vertical direction, so that the electric tool shaft can be flexibly clamped and moved; through the arrangement of the first stop block, the second stop block, the containing groove and the abutting part, the clamping end of the electric tool shaft is placed in the caulking groove on the first stop block, the abutting end is placed on the upper surfaces of the containing groove and the second stop block, and the abutting part abuts against the position right above the electric tool shaft, so that the stability of the electric tool shaft in the transferring process of the first transferring mechanism is improved in the transferring process; during polishing, the first stop block, the second stop block, the accommodating groove, the abutting part and the supporting plate limit the electric tool shaft together to form stable limit of four-point limit, so that the electric tool shaft is well positioned under the condition of no positioning hole; the arrangement of the blanking port can prevent the thread from being ground flat by the relative friction between the thread and the second stop block during grinding, thereby protecting the thread section; the first setting that drives actuating cylinder can realize the horizontal migration of second grip block to the realization is to the centre gripping of electric tool axle and is relaxed.

preferably, the grinding machine body includes grinding wheel assembly, guide wheel subassembly and cooling module, the grinding machine body in grinding wheel assembly with install between the guide wheel subassembly and be used for the butt the layer board of electric tool axle, the both sides of layer board are provided with the confession first grip block and the yielding portion that the second grip block stretched into, high frequency polisher still including set up in the water catch bowl of grinding machine body below and with iron fillings collection mechanism that the water catch bowl is connected, iron fillings collection mechanism is including supplying with the coolant liquid cooling module's water supply installation.

By adopting the technical scheme, the electric tool shaft can be cooled during polishing through the cooling assembly, so that the phenomenon that the surface temperature of the polished electric tool shaft is too high and oxidation corrosion is caused with air is prevented; the scrap iron collecting mechanism can collect scrap iron in the used cooling liquid, so that the production cost of the electric tool shaft is saved, and the scrap iron in the cooling liquid is removed, so that the cooling liquid can be reused conveniently; through water catch bowl, iron fillings collection mechanism and water supply installation, can realize the recovery and the recycle of coolant liquid, green when having reduced electric tool axle manufacturing cost.

Preferably, the top of the supporting plate is provided with a first groove, and one side of the upper part of the supporting plate is provided with a first positioning groove matched with the first positioning ring and a second positioning groove matched with the second positioning ring.

By adopting the technical scheme, the electric tool shaft is embedded in the first groove, so that the stability of the electric tool shaft during polishing is improved; the first locating groove is embedded in the first locating groove, the second locating ring is embedded in the second locating groove, and stability of the electric tool shaft during polishing is further improved.

Preferably, the clamping assembly further comprises an abutting portion including a fixing ring fixedly connected with the vertically moving portion, the fixed ring is provided with a first fixed plate, the moving component is provided with a second fixed plate, a guide plate is arranged between the first fixing plate and the second fixing plate in a penetrating way, the guide plate is connected with the first fixing plate in a sliding way, an adjusting plate is arranged at the bottom of the guide plate, a limiting post is arranged on the adjusting plate, the limiting post is connected with the first fixing plate in a sliding way, a first limiting block is arranged above the first fixing plate of the limiting column, a second limiting block is arranged above the second fixing plate of the limiting column, the adjusting plate is provided with an adjusting groove, the butt plate is installed in the adjusting groove, and a second groove matched with the electric tool shaft is formed in the lower surface of the butt plate.

by adopting the technical scheme, the abutting part abuts against the upper part of the electric tool shaft through the abutting plate, and the second limiting block and the limiting column are arranged, so that the abutting part limits the electric tool shaft by means of the gravity of the abutting part, the stability of the electric tool shaft in the transferring process is improved, and meanwhile, the electric tool shaft keeps stable rotation in the polishing process of the electric tool shaft, and the abutting part can be prevented from pressing the electric tool shaft too tightly to hinder the normal rotation of the electric tool shaft; the movement of the abutting part is limited through the arrangement of the first limiting block, so that the movement stroke of the abutting part is smaller than the movement stroke of the first clamping plate and the second clamping plate, and after the abutting part stops moving for a certain distance, the first clamping plate and the second clamping plate continue to move, so that the electric tool shaft is separated from the abutting part, and the electric tool shaft after being polished is conveniently transferred to the discharging mechanism from the clamping assembly; when polishing is carried out, the arrangement of the position-giving part can prevent the first clamping plate and the second clamping plate from colliding with the supporting plate, so that the stability of the polishing process is improved; through the setting of adjustment tank on the regulating plate, the distance of adjustable butt joint board and layer board to realize that butt portion supports the pressure to the electric tool axle of different diameters.

Preferably, first feed mechanism includes the last silo that base and slope set up, the discharge gate department of going up the silo is provided with ejection of compact structure, and the below of discharge gate is provided with the push pedal, the push pedal includes blanking portion and material loading portion, blanking portion is the panel of a slope, the transport tank that is used for the material loading is offered to material loading portion, the lower part of material loading portion is provided with spacing portion, one side of material loading portion is provided with the second and drives actuating cylinder under the drive that actuating cylinder was driven to the second, can promote the push pedal slides, and works as when actuating cylinder was in minimum stroke department to the second, spacing portion butt is in one side of base.

By adopting the technical scheme, the electric tool shaft after being polished moves downwards under the limit of the first clamping plate and the second clamping plate, the electric tool shaft after being polished gradually abuts against the blanking part, and the first clamping plate and the second clamping plate continue to move downwards, so that the electric tool shaft after being polished is separated from the first stop block, the second stop block and the accommodating groove, the second clamping plate moves towards one side far away from the first clamping plate, and the push plate moves towards one side far away from the second driving cylinder under the drive of the second driving cylinder until the conveying groove just faces the clamping assembly; in the process, the blanking part is a plate which is obliquely arranged, the polished electric tool shaft slides down along the blanking part under the pushing of the blanking part and rolls on a conveying belt of the first discharging mechanism under the blocking of the baffle plate to finish blanking, and the electric tool shaft to be ground in the conveying groove is clamped by the clamping assembly to finish feeding; therefore, through the arrangement of the push plate, the blanking and the feeding can be completed under the condition that the second driving cylinder moves once, the blanking and feeding speed is greatly improved, and the polishing efficiency is further improved.

Preferably, the high-frequency grinding machine further comprises a second transfer mechanism, a second feeding mechanism and a second discharging mechanism, wherein the second transfer mechanism, the second feeding mechanism and the second discharging mechanism are arranged on the other side of the grinding machine body, the second transfer mechanism is consistent with the first transfer mechanism in structure, the second feeding mechanism is consistent with the first feeding mechanism in structure, the second discharging mechanism is consistent with the first discharging mechanism in structure, the second transfer mechanism is matched with the first transfer mechanism, when the first transfer mechanism is in a grinding state, the second transfer mechanism is in a grinding state, and when the first transfer mechanism is in a grinding state, the second transfer mechanism is in a grinding state.

through adopting above-mentioned technical scheme, first transport mechanism mutually supports with second transport mechanism, when first transport mechanism is in the state of polishing, second transport mechanism is in the state of waiting to grind, when first transport mechanism is in the state of waiting to grind, second transport mechanism is in the state of polishing, make to the greatest extent, the idle time of high frequency polisher has been reduced, the efficiency of polishing of electric tool axle has not only been improved, and the cost of polishing has been reduced, just can realize the work load of two ordinary polishers with a high frequency polisher, and then reduced the occupation of land space of polisher, water and electricity consumption, thereby the processing cost of preparation electric tool axle has been reduced.

In conclusion, the invention has the following beneficial effects:

the electric tool shaft produced by the process has the characteristics of high production efficiency and low production cost, and the produced electric tool shaft has high coaxiality and structural strength, high reliability and long service life.

Drawings

FIG. 1 is a schematic view of the construction of a power tool shaft of the present patent;

FIG. 2 is a schematic structural diagram of a high frequency sander in this patent;

FIG. 3 is a schematic structural diagram of a grinding machine body;

FIG. 4 is an exploded view of the blade and the power tool shaft;

FIG. 5 is a schematic structural view of the scrap iron collecting mechanism;

FIG. 6 is a schematic structural diagram of the first transfer mechanism and the second transfer mechanism;

FIG. 7 is a schematic structural view of a moving assembly;

FIG. 8 is a schematic mechanical diagram of the moving assembly and the clamping assembly;

Fig. 9 is a schematic structural view of the first lower plate;

fig. 10 is a schematic structural view of a second lower plate;

FIG. 11 is a schematic view of the structure at A in FIG. 6;

FIG. 12 is a schematic structural view of a first feeding mechanism and a first discharging mechanism;

FIG. 13 is a schematic structural view of a push plate;

Fig. 14 is a schematic structural view of a prior art electric tool shaft.

in the figure: 1. a shaft body; 11. a first limiting section; 111. a butting end; 12. a first limit groove; 13. a second limiting section; 131. a clamping end; 14. a second limit groove; 15. a threaded segment; 16. a first positioning ring; 17. a second positioning ring; 2. a grinder body; 21. a grinding wheel assembly; 22. a guide wheel assembly; 23. a cooling assembly; 231. a water spray pipe; 232. a water supply device; 24. a support plate; 241. a first groove; 242. a first positioning groove; 243. a second positioning groove; 244. a relief portion; 3. a support; 4. a chute; 5a, a first transfer mechanism; 5b, a second transfer mechanism; 51. a moving assembly; 511. a slider; 512. a drive screw; 513. a drive motor; 514. a connecting plate; 5141. connecting grooves; 515. connecting blocks; 516. a vertical plate; 517. a butting block; 518. a driving oil cylinder; 519. clamping a plate; 52. a clamping assembly; 521. a support plate; 522. a first clamping plate; 5221. a first upper plate; 5222. a first lower plate; 5223. a clamping groove; 523. a second clamping plate; 5231. a first driving cylinder; 5232. a second upper plate; 5233. a second lower plate; 5234. a containing groove; 524. a first stopper; 5241. caulking grooves; 525. a second stopper; 5251. a blanking port; 526. an abutting portion; 5261. a fixing ring; 5262. a first fixing plate; 5263. a second fixing plate; 5264. a guide plate; 5265. an adjusting plate; 5266. a limiting column; 5267. a first stopper; 5268. a second limiting block; 5269. an adjustment groove; 526a, an abutment plate; 526b, a second groove; 6. an iron scrap collecting mechanism; 61. a liquid storage cavity; 62. a separation tank; 63. a rubber roller; 64. a magnetic roller; 65. a squeegee; 7a, a first feeding mechanism; 7b, a second feeding mechanism; 71. a base; 72. a feeding trough; 721. a base plate; 722. a side wall; 723. a discharging structure; 7231. a fixed block; 7232. a material pressing plate; 73. pushing the plate; 731. a blanking part; 732. a feeding part; 7321. a transport trough; 733. a limiting part; 734. a second driving cylinder; 8a, a first discharging mechanism; 8b, a second discharging mechanism; 81. a conveyor belt; 82. a cooling tank; 83. a baffle plate; 9. a water collection tank.

Detailed Description

the present invention will be described in further detail with reference to the accompanying drawings.

referring to fig. 1, an electric tool shaft includes solid cylindrical shaft body 1, and the one end of shaft body 1 is provided with first spacing section 11, and first spacing section 11 includes first spacing groove 12, and the other end of shaft body 1 is provided with spacing section 13 of second, and spacing section 13 of second includes spacing groove 14 of second, and one side that spacing section 13 of second was kept away from to first spacing section 11 is provided with screw thread section 15.

one side of the first spacing segment 11 close to the second spacing segment 13 is provided with a first positioning ring 16 and a second positioning ring 17, one end of the first spacing segment 11 far away from the second spacing segment 13 is provided with a butt joint end 111, the butt joint end 111 is in an arc shape, one end of the second spacing segment 13 far away from the first spacing segment 11 is provided with a clamping end 131, and the clamping end 131 is provided with a clamping groove 5223.

a process for preparing an electric tool shaft, comprising:

S1, hardening and tempering the electric tool shaft; the method comprises the following specific steps:

A1, placing the electric tool shaft in a heat treatment furnace at 840-860 ℃ for heating and heat preservation for 3-3.5 h;

A2, quenching by using 8-12% NaCl aqueous solution or NaOH aqueous solution;

A3, placing the electric tool shaft in a heat treatment furnace, tempering at 560-.

Through quenching, the strength and hardness of the electric tool shaft are improved, and the austenitized workpiece obtains martensite as much as possible; through high-temperature tempering, the quenching stress is reduced, the corresponding tissue transformation is ensured, and the toughness and the plasticity of the electric tool shaft are improved; the NaCl aqueous solution or NaOH aqueous solution is used for quenching, so that the cooling speed of quenching can be increased, and better mechanical properties can be obtained.

S2, straightening the electric tool shaft; and (5) straightening the electric tool shaft by using a straightening machine.

Through the straightening treatment, the defects of bending, wave and the like can be generated in the process of rolling, cooling or transporting the electric tool shaft, and through the straightening treatment of the straightening machine, the coaxiality of the electric tool shaft is improved, and the defects of bending, wave and the like are reduced or eliminated.

S3, carrying out rough grinding on the electric tool shaft; and (5) carrying out coarse grinding on the electric tool shaft by using a cylindrical grinding machine.

By rough grinding, provision is made for turning and a balanced margin is reserved for finish grinding.

S4, carrying out primary turning on the electric tool shaft; and (4) carrying out primary turning by using a computer numerical control machine tool.

Through preliminary turning, form first spacing groove 12, second spacing groove 14, first holding ring 16, second holding ring 17, butt end 111 and exposed core 131 on the electric tool axle to when the fine grinding, carry out the centre gripping to the electric tool axle.

s5, turning the electric tool shaft again; and (5) carrying out turning again by using the computer numerical control machine tool.

By turning again, the threaded section 15 on the electric tool shaft is formed.

S6, carrying out high-frequency heat treatment on the electric tool shaft; the surface of the shaft of the electric tool is subjected to high-frequency induction heating surface quenching by using current with the current frequency of 600-750 kHz.

By utilizing the electromagnetic induction principle, induction current with high density is generated on the surface of the electric tool shaft, and the electric tool shaft is rapidly heated to an austenite state and then rapidly cooled to obtain a martensite structure. The surface hardening layer with the thickness of 1-2mm can be obtained, and the structural strength, the hardness and the wear resistance of the surface of the electric tool shaft are improved.

S7, finely grinding the electric tool shaft; and (4) carrying out fine grinding on the electric tool shaft by using a high-frequency grinding machine.

Referring to fig. 2, the high-frequency grinding machine includes a grinding machine body 2, a support 3 installed above the grinding machine body 2, a first feeding mechanism 7a and a second feeding mechanism 7b installed on two sides of the grinding machine body 2, respectively, a first transfer mechanism 5a used in cooperation with the first feeding mechanism 7a, a second transfer mechanism 5b used in cooperation with the second feeding mechanism 7b, and a first discharging mechanism 8a used in cooperation with the first transfer mechanism 5a and a second discharging mechanism 8b used in cooperation with the second transfer mechanism 5 b.

Referring to fig. 3 and 4, the grinding machine body 2 includes a grinding wheel assembly 21, a guide wheel assembly 22, and a cooling assembly 23, and a support plate 24 for abutting against the electric tool shaft is installed between the grinding wheel assembly 21 and the guide wheel assembly 22. The top of the supporting plate 24 is provided with a first groove 241, and the bottom of the first groove 241 is arc-shaped. One side of the upper part of the supporting plate 24 is provided with a first positioning groove 242 matched with the first positioning ring 16 and a second positioning groove 243 matched with the second positioning ring 17. When the electric tool shaft abuts against the top of the supporting plate 24, the electric tool shaft can be embedded in the first groove 241, the first positioning ring 16 is embedded in the first positioning groove 242, and the second positioning ring 17 is embedded in the second positioning groove 243, so that the electric tool shaft is fixed.

referring to fig. 2 and 3, the cooling module 23 includes a water spray pipe 231 installed on the grinding wheel module 21 and a water supply device 232 connected to the water spray pipe 231, a water pump is installed in the water supply device 232, and the water supply device 232 can supply cooling fluid to the water spray pipe 231. A water collecting tank 9 is arranged below the grinding machine body 2, and the water collecting tank 9 can be used for collecting the cooling liquid sprayed from the spray pipe 231. The cooling assembly 23 can perform full-process spray cooling on the grinding of the electric tool shaft, and prevent the surface of the electric tool shaft from being overheated and oxidized by air.

referring to fig. 2 and 5, the high-frequency grinding machine further comprises an iron scrap collecting mechanism 6 connected with the water collecting tank 9, wherein the iron scrap collecting mechanism 6 comprises a liquid storage cavity 61, a separating tank 62 communicated with the liquid storage cavity 61, and a rubber roller 63 and a magnetic roller 64 arranged on the separating tank 62. The cooling liquid with iron chips in the water collecting tank 9 flows into the separating tank 62, the magnetic roller 64 adsorbs the iron chips on the surface of the separating tank, the rubber roller 63 is meshed with the magnetic roller 64, and along with the rotation of the magnetic roller 64, the rubber roller 63 can extrude the cooling liquid in the iron chips on the surface of the magnetic roller 64, so that the accelerated separation of the iron chips adsorbed on the surface of the magnetic roller 64 and the cooling liquid is realized. The magnetic roller 64 is provided with a scraper 65 on one side and is just attached to the surface of the magnetic roller 64. As the magnetic roller 64 rotates, the iron pieces are caught on the scraper 65 to facilitate collection of the iron pieces. The cooling liquid flows into the liquid storage cavity 61 so as to be recycled, the liquid storage cavity 61 is connected with the water supply device 232, and the water supply device 232 can supply the cooling liquid in the liquid storage cavity 61 to the water spray pipe 231 (refer to fig. 3), so that the recycling of the cooling liquid is realized.

Referring to fig. 2 and 6, the first transfer mechanism 5a and the second transfer mechanism 5b are disposed on both sides of the grinding machine body 2, and the first transfer mechanism 5a and the second transfer mechanism 5b are identical in structure. The first transfer mechanism 5a includes a moving assembly 51 and a gripping assembly 52 mounted on the moving assembly 51. The moving assembly 51 includes a horizontal moving portion for driving the holding assembly 52 to move horizontally and a vertical moving portion for driving the holding assembly 52 to move vertically.

One side of the bracket 3 is provided with a sliding groove 4, the horizontal moving part comprises a sliding block 511 (refer to fig. 7) installed in the sliding groove 4, and the sliding block 511 is L-shaped. A driving screw 512 is arranged in the sliding groove 4 along the length direction of the sliding groove 4, the sliding block 511 is connected with the sliding groove 4 in a sliding manner and sleeved on the driving screw 512, and a driving motor 513 for providing power for the rotation of the driving screw 512 is arranged on the side part of the bracket 3. Therefore, when the driving motor 513 drives the driving screw 512 to rotate, the driving screw 512 can drive the sliding block 511 to move horizontally in the sliding slot 4, and further drive the clamping assembly 52 to move horizontally.

Referring to fig. 7, the vertical moving portion includes a connecting plate 514 disposed on one side of the sliding block 511 departing from the sliding slot 4 (refer to fig. 6), a connecting slot 5141 is disposed on two sides of the connecting plate 514, two connecting blocks 515 capable of sliding along the connecting slot 5141 are embedded in the connecting slot 5141, and both the two connecting blocks 515 are fixedly connected to a vertical plate 516. An L-shaped abutting block 517 is fixedly connected to the lower part of the vertical plate 516. One side of the sliding block 511 facing the sliding groove 4 is provided with a driving oil cylinder 518, the bottom of a push rod of the driving oil cylinder 518 is fixedly connected with a clamping plate 519, and the clamping plate 519 is embedded in one side of the abutting block 517. Thereby when drive cylinder 518 drive cardboard 519 flexible, can drive butt joint piece 517 and move on vertical direction, and then drive riser 516 and move on vertical direction, connecting block 515 moves in the vertical direction in connecting groove 5141 along with riser 516, and connecting groove 5141 can carry on spacingly to the removal of riser 516, has improved the stability of its removal.

Referring to fig. 8 and 9, the clamping assembly 52 includes a support plate 521 fixedly connected to the vertical plate 516, a first clamping plate 522 and a second clamping plate 523 mounted on the support plate 521, the first clamping plate 522 and the second clamping plate 523 are respectively mounted on two sides of the support plate 521, the first clamping plate 522 includes a first upper plate 5221 and a first lower plate 5222, a clamping groove 5223 for inserting the clamping end 131 of the power tool shaft is formed at a lower end of the first lower plate 5222, a first stopper 524 is disposed on one side of the clamping groove 5223 facing the second clamping plate 523, an insertion groove 5241 is formed in the first stopper 524, and a bottom of the insertion groove 5241 is arc-shaped.

referring to fig. 8, 10 and 11, the second holding plate 523 includes a first driving cylinder 5231 installed on the supporting plate 521, a second upper plate 5232 and a second lower plate 5233, a circular accommodating groove 5234 is formed in a side of a lower portion of the second lower plate 5233 facing the first holding plate 522, a second stopper 525 is disposed on the second lower plate 5233 on the side of the accommodating groove 5234 facing the first holding plate 522, a blanking hole 5251 is formed in one side of the second stopper 525, and a top of the second stopper 525 is a convex arc surface which is just tangent to a peripheral surface of the abutting end 111 with a lower portion of the accommodating groove 5234. When the abutting end 111 of the electric tool shaft is inserted into the receiving groove 5234, the threaded section 15 is disposed at the material dropping opening 5251 to prevent the thread from rubbing against the second stopper 525 during polishing.

the arrangement of the holding groove 5223 and the accommodating groove 5234 can limit the holding end 131 and the abutting end 111 of the electric tool shaft well, thereby improving the stability of the electric tool shaft during polishing. The convex arc surface is arranged, so that the contact part of the electric tool shaft with the first clamping plate 522 and the second clamping plate 523 can be changed into point contact by surface contact, the friction force between the electric tool shaft and the first clamping plate 522 and the second clamping plate 523 is reduced, and the abrasion degree of two ends of the electric tool shaft during polishing is reduced.

referring to fig. 8, the clamping assembly 52 further includes an abutting portion 526, the abutting portion 526 includes a fixing ring 5261 fixedly connected to the slider 511, a first fixing plate 5262 is mounted on the fixing ring 5261, an L-shaped second fixing plate 5263 fixedly connected to the riser 516 is mounted on the riser 516, two guide plates 5264 are disposed in the first fixing plate 5262 and the second fixing plate 5263 in a penetrating manner, the two guide plates 5264 are slidably connected to the first fixing plate 5262, and an adjusting plate 5265 is mounted at the bottom of the two guide plates 5264. The adjusting plate 5265 is provided with a limiting post 5266, and the limiting post 5266 is inserted through the first fixing plate 5262 and the second fixing plate 5263, and is slidably connected to the first fixing plate 5262. The first stopper 5267 is disposed on the first fixing plate 5262 of the stopper post 5266, and the second stopper 5268 is disposed on the second fixing plate 5263 of the stopper post 5266. An adjusting groove 5269 is formed in the adjusting plate 5265, an abutting plate 526a is installed in the adjusting groove 5269, and a second groove 526b matched with the electric tool shaft is formed in the lower surface of the abutting plate 526 a. Through the arrangement of the second limiting block 5268, the adjusting plate 5265 and the abutting plate 526a are suspended on the second fixing plate 5263, so that the adjusting plate 5265 and the abutting plate 526a can move vertically along with the second fixing plate 5263 and the vertical plate 516. Through the arrangement of the first limit block 5267, when the adjusting plate 5265 and the abutting plate 526a move downwards to a certain distance, the first limit block 5268 abuts against the first fixing plate 5262, so that the limit of the vertical movement of the adjusting plate 5265 and the abutting plate 526a is realized.

due to the arrangement, when the first clamping plate 522 and the second clamping plate 523 clamp and limit the electric tool shaft, the abutting plate 526a can abut against the upper side of the electric tool shaft, so that four-point limitation is formed among the abutting plate, the first limiting block 5267, the second limiting block 5268, the accommodating groove 5234 and the supporting plate 24, and the electric tool shaft can be stably rotated during polishing, and the electric tool shaft cannot be pressed too tightly to prevent the electric tool shaft from rotating during polishing.

Referring to fig. 4, the two ends of the upper portion of the supporting plate 24 are further provided with a position-giving portion 244, and the arrangement of the position-giving portion 244 can prevent the first clamping plate 522 and the second clamping plate 523 from colliding with the supporting plate 24, so as to improve the stability of the movement of the clamping assembly 52.

Referring to fig. 12, the first feeding mechanism 7a includes a base 71 and an inclined feeding chute 72, the feeding chute 72 includes a rectangular bottom plate 721 and side walls 722 installed on both sides of the bottom plate 721, and the side walls 722 are respectively formed by a corner steel and are fixed on the bottom plate 721 through bolts. The discharge gate department of feed mechanism is provided with ejection of compact structure 723, and ejection of compact structure 723 is including installing fixed block 7231 on base 71 and being located the discharge gate both sides, is provided with a pressure flitch 7232 on two fixed blocks 7231 respectively, and pressure flitch 7232 is buckled into the V-arrangement by a steel sheet, and pressure flitch 7232 passes through the top of threaded fixation at fixed block 7231. The swaging plate 7232 prevents the shaft of the electric tool to be ground from accumulating in the charging chute 72 or slipping off the discharge opening.

Referring to fig. 12 and 13, the first feeding mechanism 7a includes a push plate 73 mounted on the base 71, the push plate 73 includes a blanking portion 731 and a feeding portion 732, the blanking portion 731 is an inclined plate, a conveying groove 7321 for feeding is formed in the feeding portion 732, and the bottom of the conveying groove 7321 is arc-shaped. The lower portion of the feeding portion 732 protrudes downward to form a stopper 733. The side of the feeding part 732 away from the blanking part 731 is provided with a second driving cylinder 734, the push plate 73 can be pushed to slide along the base 71 under the driving of the second driving cylinder 734, and when the second driving cylinder 734 is at the minimum stroke, the limit part 733 abuts against one side of the base 71. The second feed mechanism 7b (refer to fig. 2) is identical in structure to the first feed mechanism 7 a.

first discharge mechanism 8a sets up in the below of first feed mechanism 7a, first discharge mechanism 8a includes conveyer belt 81 and cooling bath 82, the one end that the conveyer belt is close to ejection of compact structure 723 is provided with baffle 83, the incline direction of baffle 83 is just opposite with the incline direction of feeding trough 72, the direction that sets up of baffle 83 is perpendicular with conveyer belt length direction, therefore after the electronic instrument axle after finishing polishing falls baffle 83, can follow baffle 83 landing on conveyer belt 81, and simultaneously, electronic instrument axle can correct its gliding direction at the in-process of falling along baffle 83, make electronic instrument axle unanimous with the direction of baffle 83, thereby the stability of conveyer belt 81 transportation electronic instrument axle has been improved. The end of the conveyor belt 81 far from the discharging structure 723 is provided with a cooling tank 82, and the cooling tank 82 is filled with cooling liquid.

When the high-frequency grinding machine works:

B1, the shaft of the electric tool can slide gradually along the feeding chute 72 to the discharge opening, and finally fall from the feeding chute 72 and roll into the transportation chute 7321 under the pressing of the pressing plate 7232.

b2, the electric tool shaft that the first grip block 522 centre gripping was polished moves down under the drive of drive cylinder 518, after moving a distance, butt joint board 526a stops moving under the effect of first stopper 5267, thereby make the electric tool shaft that polishes separate with butt joint board 526a, and first grip block 522 and second grip block 523 continue to move down, the electric tool shaft that polishes is supported on blanking portion 731 gradually, first grip block 522 and second grip block 523 continue to move down, thereby make the electric tool shaft that polishes disengage with first dog 524, second dog 525 and storage tank 5234.

B3 and the second holding plate 523 are moved in a direction away from the first holding plate 522 by the first driving cylinder 5231.

B4, the push plate 73 is driven by the second driving cylinder 734 to move to the side away from the second driving cylinder 734 until the transportation groove 7321 is right opposite to the clamping assembly 52; in this process, since the blanking portion 731 is a plate obliquely disposed, under the pushing of the blanking portion 731, the polished shaft of the electric tool slides down along the blanking portion 731, and falls on the conveyor belt 81 of the first discharging mechanism 8a under the blocking of the baffle 83.

B5 and the second holding plate 523 are driven by the first driving cylinder 5231 to move toward the first holding plate 522, so as to push the electric tool shaft to be ground in the transportation groove 7321 toward the first holding plate 522, when the first driving cylinder 5231 is in the minimum stroke, the holding end 131 of the electric tool shaft to be ground is just above the first stop 524, and the abutting end 111 is just above the second stop 525 and the accommodating groove 5234.

B6, the clamping assembly 52 moves upward under the driving of the driving cylinder 518, so that the shaft of the electric tool to be ground is lifted up under the abutting of the first stop 524, the second stop 525 and the receiving groove 5234, and gradually abuts against the second groove 526B of the abutting plate 526a, and pushes the abutting portion 526 to move upward until the driving cylinder 518 returns to its minimum stroke.

b7, the conveyor belt 81 is started, and the polished electric tool shaft is conveyed by the conveyor belt 81 until falling into the cooling liquid in the cooling tank 82.

B8, the first transfer mechanism 5a moves along the chute 4 to the position right above the pallet 24 by the driving of the driving motor 513.

B9, the clamping assembly 52 for clamping the electric tool shaft to be ground moves downward under the driving of the driving oil cylinder 518, when the driving oil cylinder 518 is at the maximum stroke, the electric tool shaft to be ground just abuts against the first groove 241 of the supporting plate 24, so that four-point limiting is formed by the electric tool shaft to be ground, the first limiting block 5267, the second limiting block 5268, the accommodating groove 5234 and the supporting plate 24, and the electric tool shaft to be ground is ground; at the same time, the second transfer mechanism 5B is performing the above-described B1-B7.

B10, after polishing, the clamping assembly 52 is driven by the first oil cylinder and the driving motor 513 to lift upwards, then move to the upper part of the first discharging mechanism 8a, and repeat B1-B7; meanwhile, the second transfer mechanism 5B holds another electric tool shaft to be ground to perform the above-mentioned B8-B9.

First drive cylinder, second drive cylinder, actuating cylinder, the removable telescopic drive assembly who is equivalent for other functions that appears in this patent, for example: an electric push rod.

By the process in the patent, continuous processing and accurate grinding of the electric tool shaft with the positioning holes not formed in the two ends are realized. Meanwhile, the first transfer mechanism 5a and the second transfer mechanism 5b are matched with each other, when the first transfer mechanism 5a is in a grinding state, the second transfer mechanism 5b is in a state of waiting to be ground, when the first transfer mechanism 5a is in a state of waiting to be ground, the second transfer mechanism 5b is in a grinding state, so that to the greatest extent, the idle time of a high-frequency grinding machine is reduced, the grinding efficiency of the electric tool shaft is improved, the grinding cost is reduced, the workload of two common grinding machines can be realized by using one high-frequency grinding machine, the occupied space of the grinding machine is further reduced, the water and electricity consumption is further reduced, and the processing cost for preparing the electric tool shaft is further reduced.

The electric tool shaft produced by the process has the advantages that the two ends are not required to be provided with the positioning holes, the coaxiality of the electric tool shaft is high, the structural strength is high, the service life is long, and the stability is strong.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims

1. A process for preparing an electric tool shaft, the electric tool shaft comprises a solid cylindrical shaft body (1), it is characterized in that one end of the shaft body (1) is provided with a first limit section (11), the first limiting section (11) comprises a first limiting groove (12), the other end of the shaft body (1) is provided with a second limiting section (13), the second limiting section (13) comprises a second limiting groove (14), a threaded section (15) is arranged on one side of the first limiting section (11) far away from the second limiting section (13), a first positioning ring (16) and a second positioning ring (17) are arranged on one side of the first limiting section (11) close to the second limiting section (13), one end of the first limiting section (11) far away from the second limiting section (13) is provided with a butting end (111), one end of the second limiting section (13) far away from the first limiting section (11) is provided with a clamping end (131);

The preparation process of the electric tool shaft comprises the following steps:

S1, hardening and tempering the electric tool shaft;

S2, straightening the electric tool shaft;

S3, carrying out rough grinding on the electric tool shaft;

s4, carrying out primary turning on the electric tool shaft;

s5, turning the electric tool shaft again;

S6, carrying out high-frequency heat treatment on the electric tool shaft;

S7, finely grinding the electric tool shaft;

the fine grinding of the electric tool shaft is specifically realized by using a high-frequency grinding machine to perform fine grinding on the electric tool shaft; high frequency polisher include grinding machine body (2), install in support (3) above grinding machine body (2), install in first feed mechanism (7a) of grinding machine body (2) one side, with first transport mechanism (5a) that first feed mechanism (7a) cooperation was used and with first discharge mechanism (8a) of transport mechanism (5a) complex, first transport mechanism (5a) including remove subassembly (51) and install in centre gripping subassembly (52) on removal subassembly (51), remove subassembly (51) including can drive centre gripping subassembly (52) are the horizontal migration portion of horizontal motion and can drive centre gripping subassembly (52) are the vertical migration portion of vertical direction motion, centre gripping subassembly (52) include backup pad (521) and install in first grip block (522) on backup pad (521), A second clamping plate (523) and a contact part (526), wherein the first clamping plate (522) is provided with a clamping groove (5223) matched with the clamping end (131), one side of the clamping groove (5223) facing the second clamping plate (523) is provided with a first stop block (524), the first stop block (524) is provided with an embedding groove (5241), the bottom of the embedding groove (5241) is arc-shaped, one side of the second clamping plate (523) facing the first clamping plate (522) is provided with an accommodating groove (5234) corresponding to the embedding groove (5241), the accommodating groove (5234) is matched with the contact part (111), one side of the lower part of the second clamping plate (523) facing the first clamping plate (522) is provided with a second stop block (5251) corresponding to the first stop block (524), one side of the second stop block (525) is provided with a blanking port (5251), the upper surface of second dog (525) is the convex arc face, and the convex arc face with storage tank (5234) just with the peripheral face of butt end (111) is tangent, the centre gripping of electric tool axle accessible first grip block (522) and second grip block (523) is spacing to move under the butt of a butt joint board (526a) lower part, second grip block (523) still including install in first drive actuating cylinder (5231) on backup pad (521), first drive actuating cylinder (5231) can be used to the drive second grip block (523) carry out the horizontal migration.

2. the manufacturing process of the electric tool shaft according to claim 1, wherein the grinding machine body (2) comprises a grinding wheel assembly (21), a guide wheel assembly (22) and a cooling assembly (23), a supporting plate (24) for abutting against the electric tool shaft is installed between the grinding wheel assembly (21) and the guide wheel assembly (22) of the grinding machine body (2), a position yielding portion (244) for the first clamping plate (522) and the second clamping plate (523) to extend into is arranged on two sides of the supporting plate (24), the high-frequency grinding machine further comprises a water collecting tank (9) arranged below the grinding machine body (2) and an iron scrap collecting mechanism (6) connected with the water collecting tank (9), and the iron scrap collecting mechanism (6) comprises a water supply device (232) capable of supplying cooling liquid to the cooling assembly (23).

3. the manufacturing process of the electric tool shaft as claimed in claim 2, wherein a first groove (241) is formed at the top of the supporting plate (24), and a first positioning groove (242) matched with the first positioning ring (16) and a second positioning groove (243) matched with the second positioning ring (17) are formed at one side of the upper part of the supporting plate (24).

4. The manufacturing process of an electric tool shaft according to claim 1, wherein the abutting portion (526) includes a fixing ring (5261) fixedly connected to the vertically moving portion, the fixing ring (5261) is provided with a first fixing plate (5262), the moving assembly (51) is provided with a second fixing plate (5263), a guide plate (5264) is penetrated between the first fixing plate (5262) and the second fixing plate (5263), the guide plate (5264) is slidably connected to the first fixing plate (5262), an adjusting plate (5265) is installed at the bottom of the guide plate (5264), the adjusting plate (5265) is provided with a limiting post (5266), the limiting post (5266) is slidably connected to the first fixing plate (5262), the limiting post (5266) is provided with a first limiting block (5267) above the first fixing plate (5262), a second limit block (5268) is arranged above the second fixing plate (5263) of the limit column (5266), an adjusting groove (5269) is formed in the adjusting plate (5265), and the abutting plate (526a) is arranged in the adjusting groove (5269)

and a second groove (526b) matched with the electric tool shaft is formed in the lower surface of the abutting plate (526 a).

5. The manufacturing process of the electric tool shaft as claimed in claim 4, wherein the first feeding mechanism (7a) comprises a base (71) and an inclined feeding groove (72), a discharging structure (723) is arranged at a discharging opening of the feeding groove (72), a push plate (73) is arranged below the discharging opening, the push plate (73) comprises a blanking portion (731) and a feeding portion (732), the blanking portion (731) is an inclined plate, a conveying groove (7321) for feeding is arranged on the feeding portion (732), a limiting portion (733) is arranged at the lower portion of the feeding portion (732), a second driving cylinder (734) is arranged at one side of the feeding portion (732), the push plate (73) can be pushed to slide under the driving of the second driving cylinder (734), and when the second driving cylinder (734) is at the minimum stroke, the limiting part (733) is abutted against one side of the base (71).

6. The process for manufacturing an electric tool shaft according to any one of claims 1 to 5, wherein the high-frequency grinding machine further comprises a second transfer mechanism (5b), a second feeding mechanism (7b) and a second discharging mechanism (8b) provided on the other side of the grinding machine body (2), the second transfer mechanism (5b) is identical in structure to the first transfer mechanism (5a), the second feeding mechanism (7b) is identical in structure to the first feeding mechanism (7a), the second discharging mechanism (8b) is identical in structure to the first discharging mechanism (8a), and the second transfer mechanism (5b) is engaged with the first transfer mechanism (5a), and when the first transfer mechanism (5a) is in the grinding state, the second transfer mechanism (5b) is in a state to be ground, when the first transfer mechanism (5a) is in a state to be ground, the second transfer mechanism (5b) is in a grinding state.