CN110653671B - Brushing type metal workpiece surface reinforced grinding processing equipment and method - Google Patents
Brushing type metal workpiece surface reinforced grinding processing equipment and method Download PDFInfo
- Publication number
- CN110653671B CN110653671B CN201910908587.9A CN201910908587A CN110653671B CN 110653671 B CN110653671 B CN 110653671B CN 201910908587 A CN201910908587 A CN 201910908587A CN 110653671 B CN110653671 B CN 110653671B
- Authority
- CN
- China
- Prior art keywords
- workpiece
- brushing
- grinding
- processing
- bristles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work
- B24B5/307—Means for supporting work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B57/00—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents
- B24B57/04—Devices for feeding, applying, grading or recovering grinding, polishing or lapping agents for feeding of solid grinding, polishing or lapping agents
Abstract
The invention discloses brushing type metal workpiece surface strengthening grinding processing equipment and a method, wherein the processing equipment comprises a rotary clamping device, a mixing brushing device and a high-pressure spraying device, the mixing brushing device comprises a mixing mechanism and a brushing mechanism, and the brushing mechanism comprises a brushing shell, a rotating wheel brush and a second rotary driving mechanism; the rotary wheel brush is rotationally connected in the brushing shell, and bristles distributed along the circumference are arranged on the outer circular surface of the rotary wheel brush; the bottom of the inner cavity of the painting shell is provided with a storage space, and the side wall of the inner cavity of the painting shell is provided with an avoiding port for avoiding the extension of the brush hair to the processing surface of the workpiece; the rotary wheel brush is positioned above the material storage space, and the path rotated by the free end of the brush hair and the material storage space have intersection. The invention not only can ensure that the enhanced grinding effect is more uniform and the quality is better, but also can prevent the grinding material from being diffused in the working environment to cause pollution, and simultaneously avoids the processing surface of the workpiece from being oxidized.
Description
Technical Field
The invention relates to a metal workpiece surface strengthening processing device and a metal workpiece surface strengthening processing method, in particular to a brushing type metal workpiece surface strengthening grinding processing device and a brushing type metal workpiece surface strengthening grinding processing method.
Background
In the 21 st century, mechanical equipment has been filled with aspects of human life, motors as small as the nanometer scale, and rocket airplanes as large as those on the sky. The fatigue life and reliability of mechanical equipment directly influence the safety performance of the mechanical equipment, even tiny cracks can cause huge disasters and cause immeasurable consequences, and therefore the improvement of the fatigue resistance and the service life of mechanical parts has great significance.
For example, the invention application with the application publication number of CN101733707A proposes a novel machining method for reinforced grinding, in which a reinforced abrasive material is used to impact a target surface to be machined at a high speed at a certain angle, and a reinforced layer with a certain depth is formed in an impact region (the residual compressive stress on the surface of the reinforced layer reaches-750 and 1500MPa) while cutting, so as to reduce the surface roughness of a workpiece, effectively inhibit the generation of surface microcracks, prolong the fatigue life of parts, and generally improve the surface quality of the workpiece.
However, with the increasing quality and demand, the above-mentioned strengthening processing technology has the following disadvantages:
1. the uneven distribution of the steel balls, the grinding powder and the grinding liquid leads to the fact that the injection of the grinding material can not be continuously carried out in the machining process, and the machining precision is affected.
2. The grinding powder is randomly distributed on the steel balls, so that the grinding powder can not be uniformly adhered to the front of each impact point during spraying, the cutting performance is influenced to a great extent, and meanwhile, the impact strength of a machining area is reduced, so that the residual compressive stress is reduced, and the fatigue resistance is reduced.
3. The grinding powder is directly sprayed and released to the atmosphere, the density of suspended particles in a processing area is increased, the environment is polluted, the health of operators is seriously influenced, meanwhile, the grinding powder cannot be recycled, and the utilization rate of the grinding powder is reduced.
4. In the processing process, if the mixing proportion of the grinding fluid is small and the grinding fluid is accelerated to a high-speed state along with the mixed grinding material, the grinding fluid may not be adhered to the processing surface, so that the processing surface of the workpiece is directly exposed in the air, the oxidation phenomenon of the processing surface is easily caused, the surface strengthening layer is weakened, the processing efficiency is reduced, and the quality needs to be improved.
Disclosure of Invention
The invention aims to overcome the existing problems and provide brushing type metal workpiece surface strengthening grinding processing equipment which not only can ensure that the strengthening grinding processing effect is more uniform and improve the strengthening processing quality, but also can effectively prevent the grinding material from being diffused in the working environment to cause pollution and simultaneously prevent the processing surface of the workpiece from being oxidized.
The invention also aims to provide a brushing type metal workpiece surface reinforced grinding processing method.
The purpose of the invention is realized by the following technical scheme:
a brushing type metal workpiece surface strengthening grinding processing device comprises a rotary clamping device for clamping a workpiece, a mixing brushing device for uniformly brushing mixed abrasive on the processing surface of the workpiece, and a high-pressure spraying device for spraying high-speed steel balls to the processing surface of the workpiece, wherein the mixed abrasive is a semi-fluid mixture formed by mixing grinding fluid and grinding powder;
the rotary clamping device comprises an electromagnetic centerless clamp and a first rotary driving mechanism for driving the electromagnetic centerless clamp to rotate; the mixed brushing device comprises a brushing mechanism and a mixing mechanism for uniformly mixing grinding fluid and grinding powder, wherein the brushing mechanism comprises a brushing shell, a rotating wheel brush and a second rotary driving mechanism for driving the rotating wheel brush to rotate;
the rotary wheel brush is rotationally connected in the brushing shell, and bristles distributed along the circumference are arranged on the outer circular surface of the rotary wheel brush; the brushing shell is communicated with a feeding pipeline of the mixing mechanism, a storage space for storing mixed abrasive to be brushed is arranged at the bottom of an inner cavity of the brushing shell, and an avoiding opening for avoiding bristles to extend to the processing surface of a workpiece is arranged on the side wall of the inner cavity of the brushing shell; the rotary wheel brush is positioned above the material storage space, and in the rotating process, the path rotated by the free end of the brush hair and the material storage space have intersection.
The working principle of the reinforced grinding processing equipment is as follows:
when the electromagnetic centerless clamp works, a workpiece is clamped on the electromagnetic centerless clamp, the positions of a high-speed spray head and a rotating wheel brush of a high-pressure injection device are adjusted, then the mixing brushing device is started, so that the mixing mechanism mixes grinding powder and grinding liquid, and the mixed grinding material is conveyed to a storage space of a brushing shell through a conveying pipeline; the second rotary driving mechanism drives the rotary wheel brush to rotate, a circle of densely distributed bristles are arranged on the outer circular surface of the rotary wheel brush, and an intersection exists between a rotating path of a free end (namely a brushing end) of the bristles and the storage space. Under the drive of the second rotary driving mechanism, the bristles attached with the mixed abrasive continuously rotate forwards, then pass through the avoidance opening of the brushing shell to be close to the processing surface of the workpiece, and when the bristles are in contact with the processing surface of the workpiece, the mixed abrasive is brushed on the processing surface of the workpiece, so that the final transfer of the mixed abrasive is completed. In the process, the mixed abrasive is coated on the processing surface of the workpiece through the bristles which are uniformly and densely distributed on the rotating wheel brush, so that the uniformity of the arrangement of the mixed abrasive on the processing surface of the workpiece can be fully ensured, and the enhanced grinding effect is favorably improved.
When the first rotary driving mechanism is used for brushing, the electromagnetic centerless fixture is driven to rotate, and then the workpiece to be machined is driven to rotate, so that the rotary wheel brush can uniformly brush the mixed abrasive on the whole machining surface of the workpiece which continuously rotates, wherein the abrasive can be stably adhered to the machining surface of the workpiece by the abrasive liquid through the adhesive force of the abrasive liquid, and the phenomenon that the abrasive powder falls off without being subjected to strengthening machining is prevented. And starting a high-pressure jet device, and impacting the surface of the workpiece adhered with the mixture through high-speed steel balls to form a strengthened grinding layer on the surface of the workpiece.
Specifically, in the process of workpiece rotation, the metal steel ball carries huge kinetic energy to impact the surface to be processed with a certain angle at random and equal probability, because the grinding powder (composed of brown corundum with a size smaller than that of the steel ball) is uniformly adhered to the surface of the workpiece, the steel ball can impact the grinding powder, the grinding powder with a tiny contact surface can form huge instantaneous impact, when the impact strength is greater than the dynamic yield strength of the surface of the workpiece, the surface of the workpiece can generate plastic deformation, the plastic deformation has a certain depth in the impact propagation direction, after the impact is finished, only elastic deformation is generated around the workpiece, the extrusion of plastic deformation tissue recovery is not generated, and the impact area can form residual compressive stress; meanwhile, the grinding powder is separated from and takes away part of the target surface material, micro-cutting is generated on the target surface, the micro-cutting tends to be uniform after repeated processing for many times to achieve a macroscopic grinding effect, and finally the effect of strengthening the processing surface in the grinding process is achieved.
In a preferred embodiment of the present invention, the first rotary driving mechanism and the second rotary driving mechanism are driven in the same direction, and the bristles of the rotary wheel brush are arranged to brush the mixed abrasives downwards onto the processing surface of the workpiece rotating upwards at a position where the bristles of the rotary wheel brush are in contact with each other during the rotation of the workpiece and the bristles of the rotary wheel brush, so that the bristles of the rotary wheel brush can be conveniently brushed, and the mixed abrasives can be ensured to be stably attached to the processing surface of the workpiece.
In a preferred embodiment of the present invention, a discharge opening for discharging the mixed abrasives after the processing is completed is formed in the bottom of the storage space, and a discharge switch is disposed at the discharge opening.
In a preferred embodiment of the present invention, a feeding hole communicated with the feeding pipe of the mixing mechanism is disposed at the top of the inner cavity of the painting shell.
In a preferred embodiment of the present invention, the rotary clamping device further includes an axial driving mechanism for driving the electromagnetic centerless fixture to move axially.
In a preferred aspect of the present invention, the high-pressure injection device includes a hopper for loading steel balls to be injected, a high-speed injection head for injecting the steel balls at a high speed onto a surface of a workpiece, and a high-pressure suction mechanism for sucking the steel balls from the hopper to the high-speed injection head.
According to a preferable scheme of the invention, after the electromagnetic centerless clamp clamps and fixes the workpiece, the workpiece is vertically placed, and the axis of the workpiece extends along the horizontal direction; the high-speed spray head and the rotating wheel brush are respectively positioned on two sides of a vertical surface where the axis of the clamped workpiece is positioned.
According to a preferable scheme of the invention, the rotary clamping device further comprises two limit stops for positioning the workpiece from bottom to top; wherein, two limit stop set up respectively in the both sides of the vertical face through the axis of work piece. Through setting up two limit stop, not only can inject the work piece in the position that the electromagnetism centerless anchor clamps set for, play the effect of location, can also carry on spacingly to the work piece at rotatory in-process, keep off the work piece on two dogs all the time.
A brushing type metal workpiece surface strengthening grinding processing method comprises the following steps:
(1) clamping a workpiece to be machined at a preset position through an electromagnetic centerless clamp;
(2) adjusting the position of a high-speed spray head of the high-pressure spray device to align the high-speed spray head to the processing surface of the workpiece; adjusting the position of the rotary wheel brush to enable the bristles extending outwards from the avoiding opening of the brushing shell to be attached to the processing surface of the workpiece;
(3) starting the mixing and brushing device, mixing the grinding powder and the grinding fluid by the mixing mechanism, and conveying the mixed grinding material to a storage space of the brushing shell through a conveying pipeline; the rotating wheel brush is driven to rotate by the second rotary driving mechanism, bristles on the rotating wheel brush enable mixed abrasive in the storage space to be brought to the workpiece through the avoiding opening of the painting shell, and the mixed abrasive is painted on the machining surface of the workpiece;
(4) starting a first rotary driving mechanism to drive the electromagnetic centerless fixture to rotate, and then driving a workpiece to be machined to rotate; the mixed abrasive is coated on the processing surface of the workpiece which rotates continuously by the rotating wheel brush;
(5) starting the high-pressure injection device, injecting the steel balls to the processing surface of the workpiece adhered with the mixed abrasive at a high speed, enabling the high-speed steel balls to approach the processing surface of the workpiece and then directly impact the abrasive powder adhered to the surface of the workpiece along with the circular rotation of the workpiece, and enabling the processing surface of the workpiece to be strongly impacted by the abrasive powder with smaller volume so as to form a strengthened grinding layer on the surface of the workpiece.
According to a preferable scheme of the invention, in the step (3), in the driving process of the second rotary driving mechanism, the free ends of the bristles on the rotary wheel brush sequentially pass through the storage space, and part of the mixed abrasive in the storage space is attached to the free ends of the bristles through the self adhesive force and rotates forwards along with the bristles; the free ends of the bristles attached with the mixed abrasive are rotationally close to the processing surface of the workpiece from the avoiding opening of the painting shell, and when the bristles are attached to the processing surface of the workpiece, the mixed abrasive is transferred from the free ends of the bristles with small attachment surfaces to the processing surface of the workpiece with large attachment surfaces based on the action of self adhesion force; and finishing the transfer of the mixed abrasive from the storage space of the painting shell to the processing surface of the workpiece.
In a preferred embodiment of the present invention, in step (4), after the first rotary driving mechanism is started, the axial driving mechanism is started, and the workpiece makes a linear motion along the axial direction thereof while making a rotary motion, so that the workpiece can make a transverse motion relative to the rotating wheel brush and the high-speed nozzle.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the mixed abrasive formed by uniformly mixing the abrasive powder and the grinding fluid is arranged on the surface of the workpiece in a coating mode, so that the mixed abrasive can be uniformly arranged on the processing surface of the workpiece, each impact point is provided with the abrasive powder when the high-speed steel balls impact, and the effect of strengthening processing is more uniform.
2. Because the steel ball and the abrasive powder separately work, the processed surface of the workpiece is impacted after the mixed abrasive material is arranged, so that the mixed abrasive material is prevented from being mixed with the grinding fluid and the abrasive powder, a mixture with large adhesive force cannot be generated, the pipeline of the high-pressure injection device cannot be blocked, and the complete smoothness of the injection process is ensured.
3. After the grinding fluid with larger viscous force is mixed with the grinding powder, the grinding powder can be stably adhered to the surface of a workpiece, and the grinding powder can be locked, so that the grinding powder is prevented from being diffused in a working environment, air pollution is avoided, and the recovery rate of the grinding powder can be improved.
4. The mixed abrasive is coated on the surface of the workpiece, namely the surface of the workpiece is isolated from the air, so that the surface which is just finished is prevented from being oxidized, and the overall quality of the reinforced processing is effectively improved.
5. Compared with the traditional strengthening processing technology (the steel balls, the grinding powder and the grinding liquid are mixed together to impact the surface of a workpiece), the invention separates the steel balls with larger mass and volume from the grinding powder with smaller mass and volume, and the grinding powder is uniformly distributed on the surface of the workpiece through the grinding liquid, so that the grinding powder is used as a passive impact body, and the steel balls sprayed at high speed by a high-pressure spraying device are used as an active impact body; at the rotatory in-process of work piece, the steel ball carries huge kinetic energy toward the striking of workpiece surface, when carrying huge kinetic energy steel ball and attached to the little grinding powder contact of volume on the workpiece surface, huge function is not by the surface of steel ball direct transfer to the work piece, but carries out indirect transmission by the little grinding powder of volume, because the area of contact between grinding powder and the work piece is very little, be equivalent to the little grinding powder of volume possess the huge function of high-speed steel ball and strike the workpiece surface, therefore the impact stress who brings like this will be more huge, thereby bring better intensive processing effect.
Drawings
FIG. 1 is a schematic view of the apparatus for intensifying the grinding on the surface of a painted metal workpiece according to the present invention.
Fig. 2 is a perspective exploded view of the painting mechanism of the present invention.
Fig. 3 is a cross-sectional view of the painting housing of fig. 2.
Detailed Description
In order to make those skilled in the art understand the technical solutions of the present invention well, the following description of the present invention is provided with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
Referring to fig. 1 to 3, the brushing type metal workpiece surface strengthening grinding processing equipment in the embodiment includes a metal frame providing a base support, a rotary clamping device arranged in the metal frame and used for clamping a workpiece a, a mixing brushing device used for brushing a mixed abrasive uniformly on a processing surface of the workpiece a, and a high-pressure jetting device used for jetting high-speed steel balls to the processing surface of the workpiece a, wherein the mixed abrasive is a semi-fluid mixture of abrasive liquid and abrasive powder. Specifically, in the present embodiment, the inner ring of the bearing is processed as an example.
The mixed brushing device comprises a brushing mechanism and a mixing mechanism for uniformly mixing grinding fluid and grinding powder, the mixing mechanism comprises a material box for loading the grinding fluid and the grinding powder and a feeding pipeline for conveying mixed grinding materials, and a high-pressure feeder is arranged on the feeding pipeline. Specifically, in this embodiment, about the mixed mode of two kinds of lapping liquids and abrasive powder, accessible venturi realizes, through two pipelines with venturi intercommunication with lapping liquid and abrasive powder transmission to venturi in to realize the mixture of abrasive, the rethread pipeline of feeding is carried to brushing in the casing 1. Of course, other techniques available in the art can be used to mix the two abrasives.
Referring to fig. 1-3, the painting mechanism includes a painting housing 1, a rotating wheel brush 2, and a second rotation driving mechanism for driving the rotating wheel brush 2 to rotate; the brushing shell 1 is a cylindrical hollow metal component and can protect internal parts from being damaged by steel balls moving at a high speed; the rotating wheel brush 2 is rotatably connected in the brushing shell 1, and the outer circular surface of the rotating wheel brush is provided with brush bristles 2-1 distributed along the circumference; the coating shell 1 is communicated with a feeding pipeline of the mixing mechanism, a storage space 1-1 for storing mixed abrasive to be coated is arranged at the bottom of an inner cavity of the coating shell 1, and a feeding hole 1-4 communicated with the feeding pipeline of the mixing mechanism is arranged at the top of the coating shell; an avoidance port 1-2 for avoiding the extension of the brush hair 2-1 to the processing surface of the workpiece a is arranged on the side wall of the inner cavity of the brushing shell 1; the rotating wheel brush 2 is positioned above the material storage space 1-1, and in the rotating process, a path b through which the free end of the brush hair 2-1 rotates is overlapped with the material storage space 1-1. Specifically, the rotating wheel brush 2 is a hollow cylinder made of hard plastic, and brush wires (including nylon brush wires, bristle brush wires, PBT brush wires, and the like) are densely and fixedly arranged on the circumferential surface of the hollow cylinder, so that the brush bristles 2-1 are formed.
Further, the bottom of the storage space 1-1 is provided with a discharge opening 1-3 for discharging the mixed abrasive after the processing is finished, and a discharge plug is arranged at the discharge opening 1-3.
Referring to fig. 1-3, the rotary clamping device includes an electromagnetic centerless fixture, a first rotary driving mechanism for driving the electromagnetic centerless fixture to rotate, an axial driving mechanism for driving the electromagnetic centerless fixture to move axially, and two limit stoppers 4, where the two limit stoppers 4 are used to position a workpiece a from bottom to top; wherein the two limit stoppers 4 are respectively provided on both sides of a vertical plane passing through the axis of the workpiece a. Through setting up two limit stop 4, not only can inject work piece a in the position that electromagnetism centerless anchor clamps set for, play the effect of location, can also carry on spacingly to work piece a at rotatory in-process, keep off work piece a on two limit stop 4 all the time.
Referring to fig. 1 to 3, the high-pressure injection apparatus includes a hopper for loading steel balls to be injected, a high-speed injection head 3 for injecting high-speed steel balls onto a surface of a workpiece a, and a high-pressure suction mechanism for sucking the steel balls from the hopper to the high-speed injection head 3. Further, the specific structure can refer to the technical means disclosed in the patent with the publication number of CN 104942664B or other related techniques in the prior art.
Referring to fig. 1-3, the first and second rotary drive mechanisms have the same drive direction, specifically, the drive direction in this embodiment is counterclockwise. In the process that the bristles 2-1 of the workpiece a and the bristles 2-1 of the rotating wheel brush 2 rotate, the bristles 2-1 of the rotating wheel brush 2 downwards brush the mixed abrasive on the processing surface of the workpiece a which rotates upwards at the position where the bristles are contacted with each other, so that the bristles 2-1 of the rotating wheel brush 2 can be conveniently brushed, and the mixed abrasive can be stably attached to the processing surface of the workpiece a.
Referring to fig. 1-3, after the electromagnetic centerless clamp clamps and fixes the workpiece a, the workpiece a is vertically placed, and the axis of the workpiece a extends along the horizontal direction; the high-speed spray head 3 and the rotating wheel brush 2 are respectively positioned on two sides of a vertical surface where the center line of the clamped workpiece a is positioned, the high-speed spray head 3 is positioned on the upper left of the electromagnetic centerless fixture, and the distance and the angle between the high-speed spray head 3 and the workpiece a can be adjusted according to the size of the workpiece a; the high-speed shower head 3 is inclined from top to bottom toward the processing surface of the workpiece a. Specifically, the clamping manner of the electromagnetic centerless clamp can refer to the prior art of electromagnetic clamps, such as a bearing reinforced grinding machine disclosed in the invention patent with the publication number of CN 104942664B and a related technology of a reinforced grinding processing method of a wheel tooth-shaped workpiece disclosed in the invention application with the publication number of CN 109176318 a.
Specifically, the first rotation driving mechanism in the present embodiment includes a rotation driving motor, a transmission rod, and the like, and the specific structure can refer to the technical means for realizing rotation in the prior art.
The second rotary driving mechanism comprises a brushless motor arranged outside the brushing shell 1, the brushless motor comprises a winding stator and a permanent magnet rotor, and the brushless motor is connected with the rotating wheel brush 2 through threads, keys or other existing connection technologies. The specific structure and principle of the brushless motor can be referred to the prior art.
The axial driving mechanism comprises an axial driving motor and a screw rod transmission assembly, and the specific structure can refer to the technical means for realizing linear transmission in the prior art.
Referring to fig. 1 to 3, the working principle of the intensified abrasive machining apparatus in the present embodiment is as follows:
when the device works, a workpiece a (such as an inner ring of a bearing) is clamped on an electromagnetic centerless fixture, the positions of a high-speed spray head 3 and a rotating wheel brush 2 of a high-pressure spraying device are adjusted, then a mixing brushing device is started, a mixing mechanism is enabled to mix grinding powder and grinding fluid, and the mixed grinding material is conveyed into a material storage space 1-1 of a brushing shell 1 through a feeding pipeline; the second rotary driving mechanism drives the rotary wheel brush 2 to rotate, and as the circle of densely distributed bristles 2-1 are arranged on the outer circumferential surface of the rotary wheel brush 2, and the path b of the rotating free end (namely the brushing end) of the bristles 2-1 is overlapped with the storage space 1-1, when the bristles 2-1 rotate to the storage space 1-1, the bristles can be contacted with part of mixed abrasive stored in the storage space 1-1, and as the mixed abrasive has certain adhesive force, the part of mixed abrasive can be adhered to the bristles 2-1, so that the first transfer of the mixed abrasive is completed. Under the drive of the second rotary driving mechanism, the brush bristles 2-1 attached with the mixed abrasive continuously rotate forwards, then penetrate through the avoidance opening 1-2 of the painting shell 1 to be close to the processing surface of the workpiece a, and when the brush bristles contact with the processing surface of the workpiece a, the mixed abrasive is painted on the processing surface of the workpiece a, so that the final transfer of the mixed abrasive is completed. In the process, the mixed abrasive is coated on the processing surface of the workpiece a through the brush hairs 2-1 which are uniformly and densely distributed on the rotating wheel brush 2, so that the uniformity of the arrangement of the mixed abrasive on the processing surface of the workpiece a can be fully ensured, and the enhanced grinding effect is favorably improved.
When the first rotary driving mechanism is used for brushing, the electromagnetic centerless clamp is driven to rotate, and then the workpiece a to be machined is driven to rotate, so that the rotary wheel brush 2 can uniformly brush the mixed abrasive on the whole machining surface of the workpiece a which continuously rotates, wherein the grinding liquid can stably adhere the abrasive powder on the machining surface of the workpiece a through the self adhesive force, and the phenomenon that the workpiece a falls off without being subjected to strengthening machining is prevented. And starting a high-pressure spraying device, and impacting the surface of the workpiece a adhered with the mixture through high-speed steel balls to form a strengthened grinding layer on the surface of the workpiece a.
Specifically, in the process of rotating a workpiece a, metal steel balls carry huge kinetic energy to impact a surface to be processed at a certain angle at random and at equal probability, because grinding powder (composed of brown corundum with the size smaller than that of the steel balls) is uniformly adhered to the surface of the workpiece a, the steel balls can impact the grinding powder, the grinding powder with a tiny contact surface can form huge instantaneous impact, when the impact strength is greater than the dynamic yield strength of the surface of the workpiece a, the surface of the workpiece a can generate plastic deformation, the plastic deformation has a certain depth in the impact propagation direction, after the impact is finished, the periphery only generates elastic deformation, the extrusion of plastic deformation tissue recovery is not generated, and a residual compressive stress can be formed in an impact area; meanwhile, the grinding powder is separated from and takes away part of the target surface material, micro-cutting is generated on the target surface, the micro-cutting tends to be uniform after repeated processing for many times to achieve a macroscopic grinding effect, and finally the effect of strengthening the processing surface in the grinding process is achieved.
Referring to fig. 1-3, the method for strengthening and grinding the surface of the painting type metal workpiece in the embodiment includes the following steps:
(1) a workpiece a (such as an inner ring of a bearing) is placed on the two limit stops 4, and the back surface of the workpiece a is ensured to be attached to a plane supporting plate of the electromagnetic centerless fixture. The two limit stops 4 are loosened firstly, the workpiece a is attached to the plane supporting plate and moved to a proper position, namely the position of the eccentricity e within a specified range, then one limit stop 4 is moved to the position attached to the workpiece a, the stop fixing nut is screwed, and the other limit stop 4 is moved according to the method, so that the workpiece a is attached to the other limit stop 4 and the nut is screwed for fixing, and the positions of the two limit stops 4 are adjusted according to the size of the workpiece a.
(2) And electrifying the electromagnetic centerless clamp, and generating magnetic force by the electromagnetic centerless clamp so as to adsorb the workpiece a on the plane supporting plate.
(3) The position of the high-speed shower head 3 is adjusted so as to be aligned with the processing surface of the workpiece a, and so that the closest distance and the relative angle to the processing surface of the workpiece a become the predetermined values.
(4) The position of the rotary wheel brush 2 is adjusted, so that the brush bristles 2-1 extending outwards from the avoiding opening 1-2 of the brushing shell 1 are attached to the processing surface of the workpiece a, and the brush bristles 2-1 are properly bent to be attached to the processing surface of the workpiece a more tightly.
(5) Starting the mixing and brushing device, mixing the grinding powder and the grinding fluid by the mixing mechanism, and conveying the mixed grinding material to a material storage space 1-1 of the brushing shell 1 through a conveying pipeline; the rotating wheel brush 2 is driven to rotate by the second rotary driving mechanism, the free ends of the bristles 2-1 on the rotating wheel brush 2 sequentially pass through the storage space 1-1, and part of mixed abrasive in the storage space 1-1 is attached to the free ends of the bristles 2-1 by the self adhesive force and rotates forwards along with the bristles 2-1; the free end of the brush hair 2-1 attached with the mixed abrasive is rotationally close to the processing surface of the workpiece a from the avoidance port 1-2 of the painting shell 1, and when the brush hair is attached to the processing surface of the workpiece a, the mixed abrasive is transferred from the free end of the brush hair 2-1 with a smaller attachment surface to the processing surface of the workpiece a with a larger attachment surface based on the action of self adhesion force; the transfer of the mixed abrasives from the storage space 1-1 of the painting shell 1 to the machining surface of the workpiece a is completed. Wherein, because the lapping liquid has certain viscosity and polarity, therefore can wrap up the abrasive powder fully, guaranteed that the mixture can not atomize at the injection in-process to avoid the granule suspension polluted environment in the air, had stronger adsorption affinity to metal work piece a surface simultaneously, makeed the abrasive powder can be attached to the work piece a surface of rotation and do not drop.
(6) Starting a first rotary driving mechanism to drive the electromagnetic centerless fixture to rotate, and then driving the workpiece a to be machined to rotate; the rotating wheel brush 2 brushes the mixed abrasive on the processing surface of the workpiece a which rotates continuously. Meanwhile, the axial driving mechanism is started, the workpiece a does linear motion along the axial direction while doing rotary motion, so that the workpiece a can do transverse motion relative to the rotating wheel brush 2 and the high-speed spray head 3, and under the condition that the rotating wheel brush 2 and the high-speed spray head 3 are not moved, the impact of the brush of the rotating wheel brush 2 and the high-speed spray head 3 is received transversely and circularly back and forth, so that the effect of strengthening processing is improved.
(7) After the mixed brushing device stably runs, starting the high-pressure injection device, accelerating the steel balls with larger mass to a relatively higher speed, and injecting the steel balls to the surface of the workpiece a; when the steel balls carrying huge kinetic energy are contacted with the grinding powder (brown corundum, which has strong hardness and wear resistance and is 120 meshes) with small volume, the kinetic energy is transmitted within a very short time, the kinetic energy is reduced from a very large value to zero within a very short time and bounces in the opposite direction, strong impact is formed on the surface of the workpiece a, and then a strengthened grinding layer is formed on the surface.
The composition of the grinding powder and the grinding fluid can refer to the prior art, for example, the invention application with the application publication number of CN 109681532A discloses a composite processing method of the roller bearing inner ring.
The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.
Claims (10)
1. The brushing type metal workpiece surface strengthening grinding processing equipment is characterized by comprising a rotary clamping device for clamping a workpiece, a mixing brushing device for uniformly brushing mixed abrasive on the processing surface of the workpiece and a high-pressure spraying device for spraying high-speed steel balls to the processing surface of the workpiece, wherein the mixed abrasive is a semi-fluid mixture formed by mixing grinding liquid and grinding powder;
the rotary clamping device comprises an electromagnetic centerless clamp and a first rotary driving mechanism for driving the electromagnetic centerless clamp to rotate; the mixed brushing device comprises a brushing mechanism and a mixing mechanism for uniformly mixing grinding fluid and grinding powder, wherein the brushing mechanism comprises a brushing shell, a rotating wheel brush and a second rotary driving mechanism for driving the rotating wheel brush to rotate; the high-pressure injection device comprises a high-speed spray head;
the rotary wheel brush is rotationally connected in the brushing shell, and bristles distributed along the circumference are arranged on the outer circular surface of the rotary wheel brush; the brushing shell is communicated with a feeding pipeline of the mixing mechanism, a storage space for storing mixed abrasive to be brushed is arranged at the bottom of an inner cavity of the brushing shell, and an avoiding opening for avoiding bristles to extend to the processing surface of a workpiece is arranged on the side wall of the inner cavity of the brushing shell; the rotating wheel brush is positioned above the material storage space, and in the rotating process, the rotating path of the free end of the brush hair and the material storage space have intersection;
during work, the steel balls are sprayed to the processing surface of the workpiece, to which the mixed abrasive is adhered, at a high speed, and along with the circular rotation of the workpiece, the high-speed steel balls directly impact the abrasive powder adhered to the surface of the workpiece after approaching the processing surface of the workpiece, and the processing surface of the workpiece is strongly impacted by the abrasive powder with a small volume, so that a strengthened abrasive layer is formed on the surface of the workpiece.
2. A brushing type metal workpiece surface strengthening grinding processing device according to claim 1, characterized in that the first rotary driving mechanism and the second rotary driving mechanism are driven in the same direction, and in the process of rotating the workpiece and the bristles of the rotary wheel brush, at the position where the two are in contact, the bristles of the rotary wheel brush downwards brush the mixed abrasive on the processing surface of the workpiece rotating upwards.
3. The brushing type metal workpiece surface strengthening grinding processing equipment as claimed in claim 1, wherein a discharge opening for discharging the mixed abrasive after the processing is finished is arranged at the bottom of the storage space, and a discharge switch is arranged at the discharge opening.
4. A brushing type metal workpiece surface strengthening grinding processing equipment as claimed in claim 1 or 3, wherein the top of the inner cavity of the brushing shell is provided with a feed inlet communicated with a feed pipeline of the mixing mechanism.
5. The apparatus of claim 4, wherein the rotary chuck further comprises an axial driving mechanism for driving the electromagnetic centerless clamp to move axially.
6. The brushing type metal workpiece surface strengthening grinding processing equipment as claimed in claim 1, wherein after the electromagnetic centerless fixture clamps and fixes the workpiece, the workpiece is vertically placed, and the axis of the workpiece extends along the horizontal direction; the high-speed spray head and the rotating wheel brush are respectively positioned on two sides of a vertical surface where the axis of the clamped workpiece is positioned.
7. The brushing type metal workpiece surface strengthening grinding processing equipment according to claim 5, wherein the rotating clamping device further comprises two limit stoppers for positioning the workpiece from bottom to top; wherein, two limit stop set up respectively in the both sides of the vertical face through the axis of work piece.
8. The processing method applied to the brushing type metal workpiece surface strengthening grinding processing equipment is characterized by comprising the following steps:
(1) clamping a workpiece to be machined at a preset position through an electromagnetic centerless clamp;
(2) adjusting the position of a high-speed spray head of the high-pressure spray device to align the high-speed spray head to the processing surface of the workpiece; adjusting the position of the rotary wheel brush to enable the bristles extending outwards from the avoiding opening of the brushing shell to be attached to the processing surface of the workpiece;
(3) starting the mixing and brushing device, mixing the grinding powder and the grinding fluid by the mixing mechanism, and conveying the mixed grinding material to a storage space of the brushing shell through a conveying pipeline; the rotating wheel brush is driven to rotate by the second rotary driving mechanism, bristles on the rotating wheel brush enable mixed abrasive in the storage space to be brought to the workpiece through the avoiding opening of the painting shell, and the mixed abrasive is painted on the machining surface of the workpiece;
(4) starting a first rotary driving mechanism to drive the electromagnetic centerless fixture to rotate, and then driving a workpiece to be machined to rotate; the mixed abrasive is coated on the processing surface of the workpiece which rotates continuously by the rotating wheel brush;
(5) starting the high-pressure injection device, injecting the steel balls to the processing surface of the workpiece adhered with the mixed abrasive at a high speed, enabling the high-speed steel balls to approach the processing surface of the workpiece and then directly impact the abrasive powder adhered to the surface of the workpiece along with the circular rotation of the workpiece, and enabling the processing surface of the workpiece to be strongly impacted by the abrasive powder with smaller volume so as to form a strengthened grinding layer on the surface of the workpiece.
9. The processing method of the brushing type metal workpiece surface strengthening grinding processing device as claimed in claim 8, wherein in the step (3), in the process of driving by the second rotary driving mechanism, the free ends of the bristles on the rotary wheel brush pass through the storage space in sequence, and part of the mixed abrasive in the storage space is attached to the free ends of the bristles through the self adhesive force and rotates forwards along with the bristles; the free ends of the bristles attached with the mixed abrasive are rotationally close to the processing surface of the workpiece from the avoiding opening of the painting shell, and when the bristles are attached to the processing surface of the workpiece, the mixed abrasive is transferred from the free ends of the bristles with small attachment surfaces to the processing surface of the workpiece with large attachment surfaces based on the action of self adhesion force; and finishing the transfer of the mixed abrasive from the storage space of the painting shell to the processing surface of the workpiece.
10. The machining method of claim 8 wherein in step (4), after the first rotary driving mechanism is activated, the axial driving mechanism is activated to rotate the workpiece and simultaneously move the workpiece linearly along the axial direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910908587.9A CN110653671B (en) | 2019-09-24 | 2019-09-24 | Brushing type metal workpiece surface reinforced grinding processing equipment and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910908587.9A CN110653671B (en) | 2019-09-24 | 2019-09-24 | Brushing type metal workpiece surface reinforced grinding processing equipment and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110653671A CN110653671A (en) | 2020-01-07 |
| CN110653671B true CN110653671B (en) | 2021-06-25 |
Family
ID=69038995
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910908587.9A Active CN110653671B (en) | 2019-09-24 | 2019-09-24 | Brushing type metal workpiece surface reinforced grinding processing equipment and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110653671B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111843851A (en) * | 2020-07-21 | 2020-10-30 | 广州大学 | Hybrid reinforced grinding method for bearing processing |
| CN112657959B (en) * | 2020-12-22 | 2023-09-29 | 武汉大学人民医院（湖北省人民医院） | Soft endoscope pipeline cleaning device |
| CN113977452A (en) * | 2021-11-02 | 2022-01-28 | 广州大学 | Universal self-centering flexible clamp for bearing inner ring reinforced grinding and grinding device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995010391A1 (en) * | 1993-10-12 | 1995-04-20 | Toiyur, Predpriyatie Inzhenera Kacheeva V.I. | Device for applying coatings |
| WO1995010392A1 (en) * | 1993-10-12 | 1995-04-20 | 'toiyur', Predpriyatie Inzhenera Kacheeva V.I. | Device for applying coatings |
| US6737113B2 (en) * | 2001-01-10 | 2004-05-18 | 3M Innovative Properties Company | Method for improving the uniformity of a wet coating on a substrate using pick-and-place devices |
| CN2841239Y (en) * | 2005-11-14 | 2006-11-29 | 蒲鸿祯 | Air spinning combing roller brush grinding machine |
| JP5793014B2 (en) * | 2011-07-21 | 2015-10-14 | 株式会社不二製作所 | Side polishing method for hard brittle material substrate |
| SG10201508119XA (en) * | 2014-10-03 | 2016-05-30 | Ebara Corp | Substrate processing apparatus and processing method |
| CN108857598B (en) * | 2018-07-11 | 2020-03-10 | 山东大学 | Inner hole machining system and method based on electromagnetic ultrasonic vibration composite energy field |
-
2019
- 2019-09-24 CN CN201910908587.9A patent/CN110653671B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110653671A (en) | 2020-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110653671B (en) | Brushing type metal workpiece surface reinforced grinding processing equipment and method | |
| JP4656601B2 (en) | Pipe outer surface blasting equipment | |
| US6261154B1 (en) | Method and apparatus for media finishing | |
| CN110640635B (en) | Coating-writing type metal workpiece surface reinforced grinding processing method and equipment | |
| CN113681445B (en) | Efficient ultrasonic wave reinforced grinding equipment and method | |
| CN109176318B (en) | Reinforced grinding processing method for gear tooth-shaped workpiece | |
| CN102909660B (en) | Stress peening device | |
| AU2017398968A1 (en) | Method for producing a grinding tool and grinding tool | |
| CN109676534B (en) | Full-automatic sand blasting device | |
| JP2003340720A (en) | Surface treatment device | |
| CN107378795A (en) | A kind of automobile axle shaft shot-blast process | |
| CN111993298A (en) | Preparation device and preparation method of cup-shaped grinding wheel with orderly-arranged abrasive particles | |
| JP2014151223A (en) | Water column formation method and water column formation device | |
| CN111037473B (en) | Method for polishing outer surface of aviation hydraulic pipe by sand grains | |
| JP2002137166A (en) | Shot peening method and shot peening device and its jig | |
| CN202592229U (en) | Round tube rotary-feeding device | |
| CN115179178A (en) | Water jet strengthening and polishing integrated system and method for blade of blade disc | |
| CN113584295A (en) | Ultrasonic strengthening processing device for bearing outer ring raceway | |
| JP2010253593A (en) | Recessed spherical surface grinding device and method | |
| CN219309115U (en) | Surface treatment device for metal corrosion prevention | |
| CN105415203A (en) | Rotary sweeping type deep hole peening machine | |
| JPH0450906Y2 (en) | ||
| CN111843851A (en) | Hybrid reinforced grinding method for bearing processing | |
| CN102642180B (en) | Rotary feeding device of round pipe | |
| CN220740749U (en) | Steel pipe sand blasting equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |