CN110757330A - Electromagnetic reinforced grinding equipment for machining roller path of cylindrical thrust roller bearing - Google Patents
Electromagnetic reinforced grinding equipment for machining roller path of cylindrical thrust roller bearing Download PDFInfo
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- CN110757330A CN110757330A CN201910997530.0A CN201910997530A CN110757330A CN 110757330 A CN110757330 A CN 110757330A CN 201910997530 A CN201910997530 A CN 201910997530A CN 110757330 A CN110757330 A CN 110757330A
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- processing
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- box body
- roller bearing
- shaft ring
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- 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
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/10—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor involving other means for tumbling of work
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- 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
- B24B31/00—Machines or devices designed for polishing or abrading surfaces on work by means of tumbling apparatus or other apparatus in which the work and/or the abrasive material is loose; Accessories therefor
- B24B31/12—Accessories; Protective equipment or safety devices; Installations for exhaustion of dust or for sound absorption specially adapted for machines covered by group B24B31/00
Abstract
The invention discloses an electromagnetic reinforced grinding device for processing a cylindrical thrust roller bearing raceway, which comprises a processing box body, a clamping mechanism and an electromagnetic accelerating mechanism, wherein a cylindrical inner cavity is arranged in the processing box body, and a cylindrical separating column concentric with the inner cavity is arranged in the inner cavity; a processing channel is formed between the separation column and the inner cavity wall of the processing box body; the clamping mechanism clamps and fixes the shaft ring to be processed at the top of the processing box body, and the annular surface of the shaft ring to be processed is right opposite to the processing channel; the electromagnetic accelerating mechanism comprises a pulse spiral coil and a pulse power supply, and the pulse spiral coil surrounds the outer side wall of the processing box body; in the vertical direction, the pulse spiral coil is positioned above the position of the grinding steel ball which is placed in a static state in the processing channel. The electromagnetic reinforced grinding equipment can be used for simultaneously processing the whole raceway surface of the cylindrical thrust roller bearing, and has higher processing efficiency; in the actual processing process, the danger is less.
Description
Technical Field
The invention relates to a bearing reinforced grinding processing device, in particular to an electromagnetic reinforced grinding device for processing a cylindrical thrust roller bearing raceway.
Background
With the rapid development of modern industrial technology, the requirements of various industries on the safety and reliability performance and the service life of mechanical equipment are higher and higher; generally, various mechanical equipments are composed of a plurality of parts, so the physical and mechanical properties of the parts directly affect the performance and service life of the mechanical equipments. Therefore, in order to improve the mechanical properties of various parts, it is necessary to perform a strengthening process after the parts are molded, and to change the properties of the parts in terms of microstructure.
In the prior art, there are many techniques for processing the surface of a workpiece, wherein shot peening type peening is a processing means for generating a residual stress layer on the surface of the workpiece by impacting the workpiece with high-speed steel balls or steel shots, and the performance of the surface of the workpiece can be greatly improved. For example, application publication No. CN104942664A discloses a bearing strengthening mill, which directly mixes strengthening abrasive with strengthening abrasive liquid by high-pressure gas and then conveys the mixture to a nozzle to process a bearing. Although the reinforced grinding machine can automatically finish the reinforced processing of the bearing and has the advantages of simple structure, convenient control and the like, the reinforced grinding machine has the following defects:
1. in the reinforced grinding machine, only the outer circular surface of a bearing with an outer ring and an inner ring structure, such as a deep groove ball bearing, can be reinforced, but the reinforced grinding machine is not suitable for a thrust roller bearing without the outer ring and the inner ring structure, particularly a cylindrical thrust roller bearing; conventional and outdated machining techniques have to be employed for cylindrical roller bearings.
2. In the reinforced grinder, the abrasive (such as steel balls and the like) is mainly conveyed and accelerated by high-pressure gas, so that the abrasive (such as steel balls and the like) can be ejected from a nozzle at high speed to form fixed point type collision.
3. The driving mode of the reinforced grinding machine is pneumatic, in the practical application process, high-pressure equipment is required to provide high-pressure gas, grinding materials are conveyed circularly through a pipeline, and during the processing period, great attention is required to prevent potential safety hazards.
Disclosure of Invention
The invention aims to overcome the existing problems and provides the electromagnetic reinforced grinding equipment for processing the raceway of the cylindrical thrust roller bearing, which can process the whole raceway surface of the cylindrical thrust roller bearing simultaneously and has higher processing efficiency; and in the actual processing process, the danger is less.
The purpose of the invention is realized by the following technical scheme:
an electromagnetic reinforced grinding device for processing a cylindrical thrust roller bearing raceway comprises a processing box body, a clamping mechanism and an electromagnetic accelerating mechanism, wherein,
a cylindrical inner cavity is arranged in the processing box body, and a cylindrical partition column concentric with the inner cavity is arranged in the inner cavity; a processing channel is formed between the separation column and the inner cavity wall of the processing box body; the clamping mechanism clamps and fixes the shaft ring to be processed on the top of the processing box body in a covering and pressing mode, and the annular surface of the shaft ring to be processed is right opposite to the processing channel;
the electromagnetic acceleration mechanism comprises a pulse spiral coil used for generating a magnetic field by electrifying and a pulse power supply used for providing high-voltage pulse current, the pulse spiral coil surrounds the outer side wall of the processing box body, and the direction of the magnetic field inside the pulse spiral coil after being electrified is the same as the vertical extending direction of the processing channel; in the vertical direction, the pulse spiral coil is positioned above the position of the grinding steel ball which is placed in a static state in the processing channel.
The working principle of the electromagnetic reinforced grinding equipment is as follows:
when the grinding device works, the grinding steel balls are firstly uniformly and flatly laid at the bottom of the machining channel, and then the shaft ring to be machined is clamped and machined at the top of the box body through the clamping mechanism, so that the surface (namely a roller path) of the shaft ring to be machined faces downwards and faces the machining channel. The pulse power supply is switched on, so that high-voltage pulse current flows through the pulse spiral coil, a strong magnetic field is generated around the pulse spiral coil in the process, and the pulse spiral coil is positioned above the grinding steel balls, and the direction of the internal magnetic field is the same as the vertical extending direction of the processing channel, so that the magnetic field in the processing channel is equivalent to an invisible strong magnet suspended right above the grinding steel balls and attracts the grinding steel balls to move upwards in an accelerated manner.
Further, the grinding steel balls move upwards at a high speed after being accelerated by magnetic force until impacting on the shaft ring positioned at the top of the processing channel, and the plurality of grinding steel balls respectively impact on different positions of the processing surface of the shaft ring, so that a strengthened grinding layer is gradually formed. When the grinding steel ball is close to the inside of the pulse spiral coil, the power supply is cut off, the magnetic field disappears (the interference of the magnetic field on the grinding steel ball during the rear-section movement is avoided), and at the moment, the grinding steel ball can still move upwards at a high speed until the grinding steel ball impacts the shaft ring. After the grinding steel balls impact the shaft ring, the grinding steel balls fall down along the machining channel under the action of gravity and rebound force and return to the bottom of the machining channel. Switching on the power supply again to ensure that the milled steel balls after the back-off obtain driving force again, moving upwards again, impacting on the processing surface of the shaft ring at high speed, and then falling back again; and circulating in sequence to realize the reinforced processing of the surface of the shaft ring until the processing is finished.
In a preferred embodiment of the present invention, at least two pulse spiral coils are arranged and vertically surround the outer side wall of the processing box; the pulse spiral coil is connected to a pulse power supply in parallel. Above-mentioned structure sets up a plurality of pulse spiral coil that connect in parallel, and in the course of working, from up switching on in proper order down, the magnetic field that generates in proper order can loop through a plurality of electromagnetic fields like this and accelerate the grinding steel ball to reach higher process velocity.
In a preferred embodiment of the present invention, the grinding steel balls are uniformly spread at the bottom of the processing channel in a static state, and the number of overlapped layers is not more than two. In the optimization, the reasonable quantity of the grinding steel balls is set, so that the bottom of the processing channel can be uniformly paved, the effect of simultaneous processing is achieved, the motion interference among the grinding steel balls can be avoided, and the idle work is performed.
Preferably, the diameter of the grinding steel ball is 0.5-6 mm.
According to a preferable scheme of the invention, the clamping mechanism comprises a pressing plate and a fixing bolt, wherein a threaded through hole is formed in the pressing plate, and a threaded blind hole is formed in the separation column; in a clamping state, the threaded end of the fixing bolt penetrates through the threaded through hole and the inner circular hole of the shaft ring and extends into the threaded blind hole;
the diameter of the separation column is larger than that of the inner circle of the shaft ring; the maximum diameter of the cylindrical inner cavity of the processing box body is smaller than the diameter of the outer ring of the shaft ring. According to the structure, the shaft ring is placed on the separation column, the roller path of the shaft ring faces the processing channel, the shaft ring is pressed tightly through the pressing plate and locked through the fixing bolt, and clamping is completed.
Preferably, the top of the separation column is provided with a boss obtained by cutting the diameter of the body, the diameter of the boss is smaller than the diameter of the inner circle of the shaft ring, and the height of the boss is smaller than the thickness of the shaft ring. In practical application, the diameter of the boss is slightly smaller than that of the inner circle of the shaft ring, and the purpose of positioning is achieved.
Preferably, the thickness of the pressing plate is larger than that of the shaft ring, and the roughness of the lower surface of the pressing plate is smaller than 5 um. In practical application, the pressing plate is made of high-hardness materials and provides stable pressing force for the shaft ring.
In a preferred embodiment of the present invention, the processing tank is made of a non-magnetic material. In practical application, aluminum material or other high-strength non-metallic materials can be selected as the material.
Compared with the prior art, the invention has the following beneficial effects:
1. the electromagnetic reinforced grinding equipment can be used for carrying out reinforced grinding processing on the raceway of the cylindrical thrust roller bearing and has higher efficiency.
2. According to the invention, a magnetic field generated by current is used as power to drive the grinding steel balls to upwards impact on the raceway of the shaft ring at a high speed, and the grinding steel balls can move up and down circularly in the processing channel, so that the simplest and smallest-crossing circular processing path is realized, and the assistance of a conveying pipeline, an injection head and the like is not required, so that the circular processing is realized, and the device has the advantages of simple structure, small equipment size and the like.
3. Compared with the traditional high-pressure type gas injection driving mode, the high-pressure type gas injection driving device has the characteristics of being more direct and more stable through the magnetic field force generated by the current, can provide more power for grinding steel balls, and meets the requirements of some occasions needing high-strength processing.
4. Because the grinding steel balls are uniformly and flatly laid in the processing channel, after the grinding steel balls are accelerated by an electromagnetic field, all the grinding steel balls move upwards simultaneously, and the whole processing surface (namely the whole raceway) of the shaft ring is processed, the efficiency is higher, and a strengthening layer with uniform effect can be obtained.
Drawings
Fig. 1 is a sectional view of one embodiment of the electromagnetic enhanced grinding apparatus for machining a raceway of a cylindrical thrust roller bearing according to the present invention.
Fig. 2 is a sectional view of another embodiment of the electromagnetic enhanced grinding apparatus for machining a raceway of a cylindrical thrust roller bearing according to the present invention.
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.
Example 1
Referring to fig. 1, the electromagnetic reinforced grinding apparatus for machining a cylindrical thrust roller bearing raceway in the embodiment includes a machining box 1, a clamping mechanism, and an electromagnetic accelerating mechanism, wherein a cylindrical inner cavity is provided in the machining box 1, and a cylindrical partition column 2 concentric with the inner cavity is provided in the inner cavity; a processing channel is formed between the separation column 2 and the inner cavity wall of the processing box body 1; the clamping mechanism clamps and fixes a shaft ring a to be processed on the top of the processing box body 1 in a covering and pressing mode, the annular surface of the shaft ring a to be processed is right opposite to the processing channel, and the covering and pressing mode is a covering and pressing mode; the electromagnetic acceleration mechanism comprises a pulse spiral coil 3 for generating a magnetic field by electrifying and a pulse power supply for providing high-voltage pulse current, the pulse spiral coil 3 is wound on the outer side wall of the processing box body 1, and the direction of the magnetic field inside the pulse spiral coil 3 after being electrified is the same as the vertical extending direction of the processing channel; in the vertical direction, the pulse spiral coil 3 is located above the position of the grinding steel ball (in the present embodiment, the grinding steel ball is a magnetic metal ball) placed in a static state in the machining passage.
Referring to fig. 1, the grinding steel balls are uniformly laid at the bottom of the processing channel in a static state, and the number of overlapped layers is not more than two; the diameter of the grinding steel ball is 0.5-6 mm. In the optimization, the reasonable quantity of the grinding steel balls is set, so that the bottom of the processing channel can be uniformly paved, the effect of simultaneous processing is achieved, the motion interference among the grinding steel balls can be avoided, and the idle work is performed.
Referring to fig. 1, the clamping mechanism comprises a pressing plate 4 and a fixing bolt 5, a threaded through hole is formed in the pressing plate 4, and a threaded blind hole is formed in the separation column 2; in a clamping state, the threaded end of the fixing bolt 5 penetrates through the threaded through hole and the inner circular hole of the shaft ring a and extends into the threaded blind hole; the diameter of the separation column 2 is larger than that of the inner circle of the shaft ring a; the maximum diameter of the cylindrical inner cavity of the processing box body 1 is smaller than the diameter of the outer ring of the shaft ring a. According to the structure, the shaft ring a is placed on the separation column 2, the roller path of the shaft ring a faces the machining channel, the shaft ring a is pressed tightly through the pressing plate 4 and locked through the fixing bolt 5, and clamping is completed.
Further, the top of the separation column 2 is provided with a boss obtained by cutting the diameter of the body small, the diameter of the boss is smaller than the diameter of the inner circle of the shaft ring a, and the height of the boss is smaller than the thickness of the shaft ring a. In practical application, the diameter of the boss is slightly smaller than that of the inner circle of the shaft ring a, and the purpose of positioning is achieved.
Further, the thickness of clamp plate 4 is greater than the thickness of shaft collar a, and its lower surface roughness is less than 5 um. In practical application, the pressing plate 4 is made of a high-hardness material and provides a firm pressing force for the shaft ring a.
In this embodiment, the processing box 1 is made of a non-magnetic material. In practical application, aluminum material or other high-strength non-metallic materials can be selected as the material.
Referring to fig. 1, the working principle of the electromagnetic reinforced grinding device is as follows:
during working, the grinding steel balls are firstly uniformly and flatly laid at the bottom of the machining channel, and then the shaft ring a to be machined is clamped and machined at the top of the box body 1 through the clamping mechanism, so that the surface (namely a roller path) to be machined of the shaft ring a faces downwards and faces the machining channel. The pulse power supply is switched on, so that high-voltage pulse current flows through the pulse spiral coil 3, a strong magnetic field is generated around the pulse spiral coil 3 in the process, and the pulse spiral coil 3 is positioned above the grinding steel balls, and the direction of the internal magnetic field is the same as the direction of the vertical extension of the processing channel, so that the magnetic field in the processing channel is equivalent to an invisible strong magnet suspended right above the grinding steel balls and attracts the grinding steel balls to move upwards in an accelerated manner.
Further, after being accelerated by magnetic force, the grinding steel balls move upwards at high speed until impacting on the shaft ring a positioned at the top of the processing channel, and the plurality of grinding steel balls respectively impact on different positions of the processing surface of the shaft ring a, so that a strengthened grinding layer is gradually formed. When the grinding steel ball is close to the inside of the pulse spiral coil 3, the power supply is cut off, the magnetic field disappears (the interference of the magnetic field when the grinding steel ball moves at the rear section is avoided), and at the moment, the grinding steel ball still moves upwards at a high speed until the grinding steel ball collides with the shaft ring a. After the grinding steel balls impact the shaft ring a, the grinding steel balls fall down along the machining channel under the action of gravity and rebound force and return to the bottom of the machining channel. Switching on the power supply again to ensure that the milled steel balls after the falling back obtain the driving force again, moving upwards again, impacting on the processing surface of the shaft ring a at a high speed, and then falling back again; and circulating in sequence to realize the reinforced processing of the surface of the shaft ring a until the processing is finished.
Example 2
Referring to fig. 2, unlike the embodiment, the number of the pulse spiral coils 3 in the embodiment is two, and the pulse spiral coils are wound on the outer side wall of the processing box 1 along the vertical direction, and the outer side wall is provided with a jacket layer for mounting the pulse spiral coils 3; the pulse spiral coil 3 is connected in parallel to a pulse power supply. Of course, the pulse spiral coil 3 may be three, four or more. Above-mentioned structure sets up a plurality of pulse spiral coil 3 that connect in parallel, and in the course of working, from up switching on in proper order down, the magnetic field that generates in proper order can loop through a plurality of electromagnetic fields like this and accelerate the grinding steel ball to reach higher process velocity.
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 (8)
1. An electromagnetic reinforced grinding device for processing a cylindrical thrust roller bearing raceway is characterized by comprising a processing box body, a clamping mechanism and an electromagnetic accelerating mechanism, wherein,
a cylindrical inner cavity is arranged in the processing box body, and a cylindrical partition column concentric with the inner cavity is arranged in the inner cavity; a processing channel is formed between the separation column and the inner cavity wall of the processing box body; the clamping mechanism clamps and fixes the shaft ring to be processed at the top of the processing box body in a covering and pressing mode, and the annular surface of the shaft ring to be processed faces downwards to the processing channel;
the electromagnetic acceleration mechanism comprises a pulse spiral coil used for generating a magnetic field by electrifying and a pulse power supply used for providing high-voltage pulse current, the pulse spiral coil surrounds the outer side wall of the processing box body, and the direction of the magnetic field formed inside the pulse spiral coil after electrification is the same as the vertical extending direction of the processing channel; in the vertical direction, the pulse spiral coil is positioned above the position of the grinding steel ball which is placed in a static state in the processing channel.
2. The electromagnetic enhanced grinding device for machining cylindrical thrust roller bearing raceways as claimed in claim 1, characterized in that said pulsed helical coils are at least two and are wound on the outer side wall of the machining box in the vertical direction; the pulse spiral coil is connected to a pulse power supply in parallel.
3. The electromagnetic enhanced grinding device for processing the cylindrical thrust roller bearing raceway as claimed in claim 1 or 2, wherein the grinding steel balls are uniformly laid on the bottom of the processing channel in a static state, and the number of layers after overlapping is not more than two.
4. The electromagnetic enhanced grinding device for processing the cylindrical thrust roller bearing raceway of claim 3, wherein the diameter of the grinding steel ball is 0.5-6 mm.
5. The electromagnetic enhanced grinding equipment for processing the cylindrical thrust roller bearing raceway as claimed in claim 3, wherein said clamping mechanism includes a pressing plate and a fixing bolt, said pressing plate is provided with a threaded through hole, and said separation column is provided with a threaded blind hole; in a clamping state, the threaded end of the fixing bolt penetrates through the threaded through hole and the inner circular hole of the shaft ring and extends into the threaded blind hole;
the diameter of the separation column is larger than that of the inner circle of the shaft ring; the maximum diameter of the cylindrical inner cavity of the processing box body is smaller than the diameter of the outer ring of the shaft ring.
6. The electromagnetic enhanced grinding apparatus for machining a cylindrical thrust roller bearing raceway of claim 5, wherein a boss obtained by cutting down a diameter of the body is provided at a top of the partitioning column, the boss having a diameter smaller than a diameter of an inner circle of the race and a height smaller than a thickness of the race.
7. The electromagnetic enhanced grinding device for machining the cylindrical thrust roller bearing raceway of claim 5, wherein the thickness of the pressing plate is greater than that of the shaft ring, and the roughness of the lower surface of the pressing plate is less than 5 um.
8. The apparatus of claim 1, wherein the processing box is made of a non-magnetic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910997530.0A CN110757330A (en) | 2019-10-18 | 2019-10-18 | Electromagnetic reinforced grinding equipment for machining roller path of cylindrical thrust roller bearing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910997530.0A CN110757330A (en) | 2019-10-18 | 2019-10-18 | Electromagnetic reinforced grinding equipment for machining roller path of cylindrical thrust roller bearing |
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| DE4001111A1 (en) * | 1990-01-17 | 1991-07-18 | Thilo Frederking | Surface treatment of shaped workpieces - which are placed in container which is oscillated in magnetic field |
| US5950470A (en) * | 1998-09-09 | 1999-09-14 | United Technologies Corporation | Method and apparatus for peening the internal surface of a non-ferromagnetic hollow part |
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Application publication date: 20200207 |