A deburring device for inner surface of through hole

Abstract

The present invention discloses a deburring device for the inner surface of a through hole, the deburring device includes a supporting cylinder, a cleaning tank, a bracket, a supporting shaft, a magnetic plate, a permanent magnet and a driving device; the supporting cylinder has a cavity with an opening at the top; the cleaning tank is accommodated in the cavity of the supporting cylinder; the cleaning tank is fixedly installed with a bracket and contains a cleaning agent with an abrasive medium; the supporting shaft is detachably mounted on the bracket; the outer peripheral surface of the supporting shaft is provided with an abrasive layer; the magnetic plate is relatively arranged at the bottom of the supporting cylinder, and a plurality of permanent magnets are fixedly mounted on the top surface; the driving device is in transmission connection with the magnetic plate; when the driving device drives the magnetic plate to rotate, the pulsed magnetic field generated by the plurality of permanent magnets drives the workpiece to reciprocate along the supporting shaft while rotating, so that friction is generated between the inner surface of the through hole of the workpiece and the abrasive layer, and the through hole of the workpiece is turbulently flushed by the cleaning agent. The above-mentioned deburring device can effectively remove burrs on the inner surface of the through hole.

Description

Technical Field

[0001] The invention relates to the technical field of surface treatment, in particular to a deburring device for the inner surface of a through hole. Background Art

[0002] During the machining process from rough to finished mechanical parts, the machined surfaces often exhibit varying degrees of surface defects, such as uneven surfaces, broken edges, burrs, scratches, and microcracks. Especially with the trend toward miniaturization and the rapid advancement of precision engineering technology, higher requirements are being placed on the machining quality of micropores, microgrooves, and complex three-dimensional microstructures in parts. Traditional grinding and polishing technologies include laser surface treatment, ultrasonic surface treatment, and solvent cleaning. However, to meet the needs of deburring and finishing processes for bearing inner and outer rings, valves, and valve sleeves, magnetic grinding and polishing technology has been widely used in many applications, including flat surfaces, inner and outer cylindrical surfaces, due to its advantages such as flexible contact, good adaptability, strong self-sharpening, low temperature rise, and the lack of need for tool wear compensation.

[0003] At present, magnetic polishing finishing technology is a new finishing technology that uses a magnetic needle as a processing medium and drives the magnetic needle and the workpiece to move relative to each other through a rotating magnetic field. In addition, the current magnetic polishing finishing technology mainly focuses on the preparation of magnetic abrasives and the improvement of the device, but there is not much research on the processing mechanism of special magnetic polishing technology and the working efficiency of special equipment. Figure 1 As shown, the rotating magnetic field is generated by the motor 2 inside the housing 1, which drives the magnetic pole array disk 4, which houses the permanent magnets 3, to rotate. Before finishing, a magnetic needle 5, abrasive fluid 6, and a workpiece 7 are mixed in the desired proportions and placed in a polishing cylinder 8, which is then covered. The motor drives the magnetic pole array disk to rotate, generating a rotating magnetic field 9. Driven by this rotating magnetic field, the magnetic needle inside the polishing cylinder begins to rotate at high speed, impacting burrs on the workpiece surface, thereby achieving the purpose of polishing the workpiece.

[0004] Existing magnetic polishing technologies, while utilizing a rotating magnetic field, rely primarily on the collision between the abrasive and the workpiece, which is often stationary. When cleaning precision parts, this approach fails to effectively and specifically polish small areas like gaps and internal holes. Furthermore, the collision of the abrasive can cause secondary damage to the precision parts. Summary of the Invention

[0005] The present invention provides a deburring device for the inner surface of a through hole. The deburring device utilizes an eccentric magnetic pole formed by a permanent magnet to combine a non-contact magnetic field with turbulence. The rotating magnetic field generated by the eccentric magnetic pole causes the workpiece to reciprocate while rotating, so that the inner surface of the through hole of the workpiece and the grinding layer of the supporting shaft continuously generate friction, effectively removing burrs on the inner surface of the through hole. Under the turbulent flushing of a cleaning agent containing a grinding medium, the outer surface, gaps, inner holes, etc. of the workpiece can also be ground without secondary damage.

[0006] The present invention adopts the following specific technical solutions:

[0007] A deburring device for the inner surface of a through hole, comprising a supporting cylinder, a cleaning tank, a bracket, a supporting shaft, a magnetic conductive plate, a permanent magnet, and a driving device; wherein:

[0008] The support cylinder has a cavity with an open top;

[0009] The cleaning tank can be freely slidably accommodated in the cavity of the supporting cylinder;

[0010] The bracket is fixedly installed in the cleaning tank and contains a cleaning agent with abrasive media;

[0011] The support shaft is detachably mounted on the bracket and is used to fit in the through hole of the workpiece; the outer peripheral surface of the support shaft is provided with a grinding layer;

[0012] The magnetic conductive plate is relatively arranged at the bottom of the supporting cylinder, and a plurality of permanent magnets for forming eccentric magnetic poles are fixedly mounted on the top surface;

[0013] The driving device is in transmission connection with the magnetic conductive plate and is used to drive the magnetic conductive plate to rotate around the vertical axis;

[0014] When the driving device drives the magnetic conductive plate to rotate, the pulsed magnetic field generated by the multiple permanent magnets drives the workpiece to reciprocate along the support shaft while rotating, so that friction is generated between the inner surface of the through hole of the workpiece and the grinding layer, and the through hole of the workpiece is turbulently flushed by the cleaning agent, thereby removing burrs in the through hole.

[0015] Furthermore, the bracket is provided with two grooves arranged opposite to each other;

[0016] The two end portions of the support shaft are clamped in the two grooves.

[0017] Furthermore, the polishing layer is formed of an elastic polymer wound around the outer peripheral surface of the support shaft.

[0018] Furthermore, the elastic polymer is a fiber filament.

[0019] Furthermore, the supporting cylinder, the cleaning tank and the bracket are all made of non-metallic materials.

[0020] Furthermore, the workpiece is a rotating body.

[0021] Furthermore, the workpiece is a sliding valve sleeve.

[0022] Furthermore, the driving device is a motor;

[0023] The output shaft of the motor is arranged in the vertical direction;

[0024] The magnetic conductive plate is fixedly connected to the top end of the output shaft and is coaxial with the output shaft.

[0025] Furthermore, a plurality of the permanent magnets are arranged on the top surface of the magnetic conductive plate to form an eccentric ring.

[0026] Furthermore, the plurality of permanent magnets form at least two "U"-shaped permanent magnet arrays distributed along the circumference of the magnetic conductive plate, and adjacent "U"-shaped permanent magnet arrays are connected end to end in sequence.

[0027] Beneficial effects:

[0028] 1. The deburring device for the inner surface of a through hole of the present invention is provided with a cleaning tank that can slide freely in the cavity of the supporting cylinder, a bracket is fixedly installed in the cleaning tank and contains a cleaning agent with abrasive media, a supporting shaft detachably installed on the bracket is matched with the through hole gap of the workpiece, and a grinding layer is provided on the outer peripheral surface of the supporting shaft, a plurality of permanent magnets are fixedly installed on the top surface of the magnetic conductive plate, the magnetic conductive plate is driven to rotate around the vertical axis by a driving device, and a pulse magnetic field is generated by the eccentric magnetic poles formed by the plurality of permanent magnets, which drives the workpiece to reciprocate along the axial direction of the supporting shaft while rotating, so that the inner surface of the through hole of the workpiece is deburred by the friction between the grinding layer and the inner surface of the through hole of the workpiece, and the workpiece is flushed by the turbulent flow of the cleaning agent, which not only can remove the burrs in the through hole of the workpiece, but also can grind the outer surface, gap, inner hole, etc. of the workpiece under the turbulent flushing of the grinding medium in the cleaning agent, and avoid secondary damage to the workpiece. Therefore, the deburring equipment of the present invention utilizes eccentric magnetic poles formed by permanent magnets to combine the non-contact magnetic field with the turbulence of the cleaning agent. The rotating magnetic field generated by the eccentric magnetic poles causes the workpiece to reciprocate while rotating, so that the inner surface of the through hole of the workpiece and the grinding layer of the supporting shaft continuously generate friction, effectively removing burrs on the inner surface of the through hole. Under the turbulent flushing of the cleaning agent containing the grinding medium, the outer surface, gap, inner hole, etc. of the workpiece can also be ground without secondary damage.

[0029] 2. Since the multiple permanent magnets installed on the top surface of the magnetic conductive plate are arranged to form an eccentric ring or at least two "U"-shaped permanent magnet arrays distributed along the circumference and connected end to end, eccentric magnetic poles of different shapes can be formed at the bottom of the workpiece through the permanent magnets. When the driving device drives the magnetic conductive plate to rotate, the permanent magnets can generate pulsed magnetic fields of different frequencies, thereby changing the movement frequency of the workpiece and further improving the surface quality of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the principle of magnetic grinding and polishing in the prior art;

[0031] Figure 2 This is a schematic diagram of the principle structure of the deburring device for the inner surface of a through hole of the present invention;

[0032] Figure 3 A schematic diagram of the arrangement structure of a permanent magnet on a magnetic conductive plate;

[0033] Figure 4 Schematic diagram of another arrangement structure of permanent magnets on a magnetic conductive plate;

[0034] Figure 5 Schematic diagram of another arrangement structure of permanent magnets on a magnetic conductive plate;

[0035] Figure 6 To adopt Figure 3 Schematic diagram of the working principle of the permanent magnet arrangement structure;

[0036] Figure 7 To adopt Figure 4 Schematic diagram of the working principle of the permanent magnet arrangement structure;

[0037] Figure 8 To adopt Figure 5 Schematic diagram of the working principle of the permanent magnet arrangement structure;

[0038] Figure 9 Schematic diagram of the process of reciprocating motion of the workpiece along the support axis.

[0039] Existing technology: 1- box, 2- motor, 3- permanent magnet, 4- magnetic pole array disk, 5- magnetic needle, 6- grinding fluid, 7- workpiece, 8- polishing cylinder, 9- rotating magnetic field

[0040] The present invention: 101-support cylinder, 102-cleaning tank, 103-bracket, 104-support shaft, 105-magnetic plate, 106-permanent magnet, 107-driving device, 108-cleaning agent, 109-workpiece, 110-grinding layer, 111-groove DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] like Figure 2 As shown in the structure, this embodiment provides a deburring device for the inner surface of a through hole, which is used for a workpiece having a through hole to remove burrs on the inner surface of the through hole of the workpiece. The workpiece 109 is a rotating body having a through hole such as a central through hole, such as a slide valve sleeve, a plunger, etc. The deburring device includes a support cylinder 101, a cleaning tank 102, a bracket 103, a support shaft 104, a magnetic plate 105, a permanent magnet 106 and a driving device 107; wherein:

[0043] The support cylinder 101 has a cavity with an opening at the top; the support cylinder 101 can be a container with an opening at the top, such as a round cylinder or a square cylinder, through which the workpiece 109 and the cleaning tank 102 are taken in and placed; the support cylinder 101 can be supported on the ground by a bracket or legs, so that the bottom surface of the support cylinder 101 is located on the top of the permanent magnet 106 and there is a gap between the bottom surface of the support cylinder 101 and the permanent magnet 106 to prevent friction between the top surface of the permanent magnet 106 and the bottom surface of the support cylinder 101; the top of the support cylinder 101 can also be provided with a top cover for sealing the opening;

[0044] The cleaning tank 102 can be freely slidably accommodated in the cavity of the supporting cylinder 101; Figure 2 、 Figure 6 、 Figure 7 and Figure 8 As shown, a plurality of cleaning tanks 102 are placed in the support cylinder 101. The cleaning tanks 102 may be rectangular tanks or circular tanks with an open top. The specific structure of the cleaning tanks 102 may be adapted to the shape of the workpiece 109. A bracket 103 is fixedly installed in the cleaning tank 102 and contains a cleaning agent 108 with an abrasive medium. The bracket 103 may be two rectangular parallelepiped blocks arranged opposite to each other and fixedly connected to the bottom surface of the cleaning tank 102 at the bottom. The bracket 103 may be integrally formed with the cleaning tank 102. Figure 9 As shown, the bracket 103 is provided with two grooves 111 arranged opposite to each other; the two ends of the support shaft 104 are clamped in the two grooves 111;

[0045] The support shaft 104 is detachably mounted on the bracket 103 for clearance fit with the through hole of the workpiece 109; the installation of the workpiece 109 is facilitated by disassembling the support shaft 104; the support shaft 104 is passed through the through hole of the workpiece 109 to support the workpiece 109; due to the clearance fit between the support shaft 104 and the through hole, the workpiece 109 can slide along the axial direction of the support shaft 104; the outer peripheral surface of the support shaft 104 is provided with a grinding layer 110, and burrs are removed by friction between the grinding layer 110 and the workpiece 109; the workpiece 109 is a metal material workpiece 109 that can be magnetic; the grinding layer 110 on the outer peripheral side of the support shaft 104 can be formed by an elastic polymer wound around the outer peripheral surface of the support shaft 104; the elastic polymer can be a fiber filament; the grinding layer 110 can also be formed by other abrasives bonded to the outer peripheral surface of the support shaft 104;

[0046] The magnetic conductive plate 105 is disposed relative to the bottom of the support cylinder 101, and a plurality of permanent magnets 106 for forming eccentric magnetic poles are fixedly mounted on the top surface. The magnetic conductive plate 105 can be a plate-shaped structure that matches the size and shape of the bottom surface of the support cylinder 101, such as a circular plate, a square plate, etc. The magnetic conductive plate 105 can be made of non-metallic materials.

[0047] The driving device 107 is in transmission connection with the magnetic conductive plate 105 and is used to drive the magnetic conductive plate 105 to rotate about the vertical axis. The driving device 107 can be a motor. The output shaft of the motor is arranged in the vertical direction. The magnetic conductive plate 105 is fixedly connected to the top of the output shaft and is coaxial with the output shaft.

[0048] The support cylinder 101, the cleaning tank 102, and the bracket 103 are all made of non-metallic materials. The non-metallic materials can be plastic, organic glass, rubber, etc. The use of non-metallic materials not only helps to reduce the weight, but also avoids shielding the pulse magnetic field generated by the permanent magnet 106.

[0049] When the driving device 107 drives the magnetic plate 105 to rotate, the pulsed magnetic field generated by the multiple permanent magnets 106 drives the workpiece 109 to reciprocate along the support shaft 104 while rotating, causing friction between the inner surface of the through hole of the workpiece 109 and the grinding layer 110, and the through hole of the workpiece 109 is turbulently flushed by the cleaning agent 108, thereby removing burrs in the through hole. When the magnetic plate 105 and the permanent magnet 106 rotate, the workpiece 109 moves with the permanent magnet 106. Figure 9 .

[0050] The above-mentioned deburring device is used to remove burrs from the inner surface of the through hole of the workpiece 109. A cleaning tank 102 that can slide freely is placed in the cavity of the support cylinder 101. A bracket 103 is fixedly installed in the cleaning tank 102 and contains a cleaning agent 108 with an abrasive medium. The support shaft 104 that can be detachably installed on the bracket 103 is matched with the through hole of the workpiece 109, and an abrasive layer 110 is provided on the outer peripheral surface of the support shaft 104. A plurality of permanent magnets 106 are fixedly installed on the top surface of the magnetic plate 105. The magnetic plate 105 is driven by a driving device 107 to rotate around the vertical axis. The workpiece 109 rotates and generates a pulsed magnetic field through the eccentric magnetic poles formed by multiple permanent magnets 106, driving the workpiece 109 to reciprocate along the axial direction of the support shaft 104 while rotating, so that the inner surface of the through hole of the workpiece 109 is deburred by friction with the grinding layer 110, and the workpiece 109 is flushed by the turbulent flow of the cleaning agent 108. Not only can the burrs in the through hole of the workpiece 109 be removed, but the outer surface, gaps, inner holes, etc. of the workpiece 109 can also be ground under the turbulent flushing of the grinding medium in the cleaning agent 108, and secondary damage to the workpiece 109 can be avoided. The above-mentioned deburring equipment can not only remove burrs, but also clean the workpiece 109 by replacing the cleaning agent, and the turbulent flow of the cleaning agent can flush away small-sized particles remaining on the surface of the workpiece 109. At this time, the main function of the grinding layer in this section is to remove small-sized particles, such as abrasives, remaining on the surface of the workpiece 109. Therefore, the deburring equipment of the present invention utilizes the eccentric magnetic poles formed by the permanent magnet 106 to combine the non-contact magnetic field with the turbulence of the cleaning agent 108. The rotating magnetic field generated by the eccentric magnetic poles causes the workpiece 109 to reciprocate while rotating, so that the inner surface of the through hole of the workpiece 109 and the grinding layer 110 of the supporting shaft 104 continuously generate friction, effectively removing the burrs on the inner surface of the through hole. Under the turbulent flushing of the cleaning agent 108 containing the grinding medium, the outer surface, gaps, inner holes, etc. of the workpiece 109 can also be ground without secondary damage.

[0051] The plurality of permanent magnets 106 of the magnetic plate 105 in the deburring device can be arranged in a variety of structures, such as Figure 3 As shown, multiple permanent magnets 106 are arranged on the top surface of the magnetic plate 105 to form an eccentric ring; when using Figure 3 When the permanent magnet 106 is arranged in an eccentric ring, the motion state of the workpiece 109 is as follows: Figure 6 As shown; can also be Figure 4 and Figure 5 As shown, multiple permanent magnets 106 form at least two "U"-shaped permanent magnet 106 arrays distributed along the circumference of the magnetic plate 105, and adjacent "U"-shaped permanent magnet 106 arrays are connected end to end. The "U"-shaped permanent magnet 106 array can be provided with 2, 3 or more; multiple permanent magnets 106 form an "8" shape or a triangular star shape; when using Figure 4When the permanent magnets 106 are arranged in an "8" shape, the motion state of the workpiece 109 is as follows: Figure 7 As shown; when using Figure 5 When the permanent magnets 106 are arranged in a triangular star shape, the motion state of the workpiece 109 is as follows: Figure 8 shown.

[0052] Since the multiple permanent magnets 106 installed on the top surface of the magnetic conductive plate 105 are arranged to form an eccentric ring or at least two "U"-shaped permanent magnet 106 arrays distributed along the circumferential direction and connected end to end in sequence, eccentric magnetic poles of different shapes can be formed at the bottom of the workpiece 109 through the permanent magnets 106. When the driving device 107 drives the magnetic conductive plate 105 to rotate, the permanent magnets 106 can generate pulsed magnetic fields of different frequencies, thereby changing the movement frequency of the workpiece 109, further improving the deburring effect, and improving the surface quality of the workpiece 109.

[0053] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. A deburring device for the inner surface of a through hole, characterized in that: It includes a supporting cylinder, a cleaning tank, a bracket, a supporting shaft, a magnetic conductive plate, a permanent magnet and a driving device; wherein: The support cylinder has a cavity with an open top; The cleaning tank can be freely slidably accommodated in the cavity of the supporting cylinder; The bracket is fixedly installed in the cleaning tank and contains a cleaning agent with abrasive media; The support shaft is detachably mounted on the bracket and is used to fit in the through hole of the workpiece; the outer peripheral surface of the support shaft is provided with a grinding layer; The magnetic conductive plate is relatively arranged at the bottom of the supporting cylinder, and a plurality of permanent magnets for forming eccentric magnetic poles are fixedly mounted on the top surface; The driving device is in transmission connection with the magnetic conductive plate and is used to drive the magnetic conductive plate to rotate around the vertical axis; When the driving device drives the magnetic conductive plate to rotate, the pulsed magnetic field generated by the multiple permanent magnets drives the workpiece to reciprocate along the support shaft while rotating, so that friction is generated between the inner surface of the through hole of the workpiece and the grinding layer, and the through hole of the workpiece is turbulently flushed by the cleaning agent, thereby removing burrs in the through hole.

2. The deburring device according to claim 1, characterized in that The bracket is provided with two grooves arranged opposite to each other; The two end portions of the support shaft are clamped in the two grooves.

3. The deburring device according to claim 1, wherein: The polishing layer is formed of an elastic polymer wrapped around the outer peripheral surface of the support shaft.

4. The deburring device according to claim 3, characterized in that The elastic polymer is a fiber filament.

5. The deburring device according to claim 1, wherein: The supporting cylinder, the cleaning tank and the bracket are all made of non-metallic materials.

6. The deburring device according to claim 1, wherein: The workpiece is a rotating body.

7. The deburring device according to claim 6, characterized in that The workpiece is a sliding valve sleeve.

8. The deburring device according to claim 1, wherein: The driving device is a motor; The output shaft of the motor is arranged in the vertical direction; The magnetic conductive plate is fixedly connected to the top end of the output shaft and is coaxial with the output shaft.

9. The deburring device according to any one of claims 1 to 8, characterized in that: A plurality of permanent magnets are arranged on the top surface of the magnetic conductive plate to form an eccentric ring.

10. The deburring device according to any one of claims 1 to 8, characterized in that: The plurality of permanent magnets form at least two "U"-shaped permanent magnet arrays distributed along the circumference of the magnetic conductive plate, and adjacent "U"-shaped permanent magnet arrays are connected end to end in sequence.

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