Method and apparatus for isometric grinding of cylindrical brittle workpieces

Abstract

The application discloses a cylindrical fragile piece isohypse grinding method and device, and the method comprises the following steps: selecting one end surface of the cylindrical fragile piece as a base surface; sleeving a fastening ring on the cylindrical fragile piece; arranging a clamping assembly on a magnetic chuck of a grinding machine, and tightly attaching the base surface of the cylindrical fragile piece to the magnetic chuck, wherein the clamping assembly is located on the circumferential side of the cylindrical fragile piece, and the fastening ring is clamped between the cylindrical fragile piece and the clamping assembly; magnetizing the magnetic chuck of the grinding machine, and moving the clamping assembly towards the cylindrical fragile piece until the clamping assembly clamps the cylindrical fragile piece; and isohypely grinding the cylindrical fragile piece. In the application, the cylindrical fragile piece isohypse grinding method and device can effectively shorten the processing time, save raw materials, and reduce the cost.

Description

Technical Field

[0001] This invention relates to the field of grinding technology, and more particularly to a method and apparatus for grinding cylindrical fragile parts at the same height. Background Technology

[0002] In production and experimentation, cylindrical fragile parts (cylindrical blanks) made of ceramic and magnetic materials often have irregular surfaces. When it is necessary to perform equal-height machining on the blank material, especially when machining cylindrical workpieces, it is essential to perform equal-height grinding (i.e., parallelism machining) on ​​both end faces of the blank. The conventional process steps are as follows:

[0003] 1. Grind a first plane parallel to the axis on the cylindrical surface of the fragile cylindrical part;

[0004] 2. Grind a second plane parallel to the first plane on the cylindrical surface by rotating it 180°;

[0005] 3. Grind a third plane parallel to the axis at a 90° angle. The third plane is perpendicular to the first plane and the second plane.

[0006] 4. Grind a fourth plane parallel to the third plane on the cylindrical surface by changing the angle by 180°;

[0007] 5. Machin one end face of the cylindrical fragile part so that it is perpendicular to two sets of planes and serves as the base plane;

[0008] 6. After clamping the cylindrical fragile part with a top block on the grinding machine, grind the other end face of the cylindrical fragile part;

[0009] To obtain workpieces with high parallelism.

[0010] The steps 1-5 above are mainly to meet the clamping requirements of step 6. Normally produced blanks have uneven outer diameters and poor roundness. When using a grinding machine to process the parallelism of the two ends of the blank, the workpiece cannot be securely clamped during grinding, leading to loosening, excessive parallelism, or even damage to the workpiece. Reasons why the stop block cannot clamp the cylindrical blank: 1. Unevenness of the blank's cylindrical surface results in a "point contact" between the stop block and the workpiece. The stop block cannot clamp the workpiece at the protrusion on the outer diameter, causing loosening during grinding; 2. Excessive roundness and surface unevenness prevent the contact point between the stop block and the workpiece from being in the upper middle part of the workpiece. If the contact point is at the lower part of the blank, the workpiece is prone to tipping over and damage during grinding. Currently, this process is the only option for fragile materials. Two sets of planes are machined on the cylindrical surface of the workpiece blank, perpendicular to one end face (base surface), i.e., perpendicular in the X, Y, and Z directions. This ensures that the stop block and the workpiece blank are clamped in a "surface contact" manner. Please refer to [link to relevant documentation]. Figure 1 , Figure 2In conventional machining processes, five steps are required to ensure that step 6 is securely clamped, which is a complex process. Furthermore, the initial grinding of the outer circle reduces the radial dimension of the raw material, resulting in material waste.

[0011] Therefore, providing a method and apparatus for leveling cylindrical fragile parts has always been a problem that those skilled in the art urgently need to solve. Summary of the Invention

[0012] To address the aforementioned technical problems, the present invention aims to provide a method and apparatus for equal-height grinding of cylindrical fragile parts, thereby solving the technical difficulties mentioned above, reducing processing time, and saving raw materials.

[0013] To achieve the above objectives, the present invention provides a method for equal-height grinding of cylindrical fragile parts, comprising the following steps:

[0014] Select one end face of the cylindrical fragile part as the base surface;

[0015] The fastening ring is fitted onto the cylindrical fragile part;

[0016] The clamping assembly is placed on the magnetic chuck of the grinding machine, and the base surface of the cylindrical fragile part is pressed against the magnetic chuck. The clamping assembly is located on the periphery of the cylindrical fragile part, and the fastening ring is clamped between the cylindrical fragile part and the clamping assembly.

[0017] The magnetic chuck of the grinding machine is magnetized, and the clamping assembly is moved toward the cylindrical fragile part until the clamping assembly clamps the cylindrical fragile part.

[0018] The cylindrical fragile part is ground at the same height.

[0019] In some embodiments, the step of fitting the fastening ring onto the cylindrical fragile part specifically includes the following steps:

[0020] The fastening ring is fitted onto the upper middle part of the cylindrical fragile part, away from the base surface.

[0021] In some embodiments, the fastening ring is located at a height of 2 / 3 to 3 / 4 of the base surface of the cylindrical fragile part.

[0022] In some embodiments, the fastening ring is malleable.

[0023] In some embodiments, the fastening ring is made of rubber, plastic, or nylon, and the width of the fastening ring is not less than 3 mm, and the thickness of the fastening ring is not less than 1 mm.

[0024] In some embodiments, the fastening ring is a self-locking nylon cable tie.

[0025] In some embodiments, the clamping assembly includes a plurality of spaced-apart stops surrounding the cylindrical fragile part, the stops being magnetically attracted and fixed by a magnetic chuck of the grinding machine.

[0026] In some embodiments, a plurality of the stops are evenly arranged around the cylindrical fragile part, the height of the stops is not higher than the height of the finished cylindrical fragile part after processing, and the height of the stops is not less than 2 / 3 of the initial height of the cylindrical fragile part.

[0027] In some embodiments, the step of magnetizing the magnetic chuck of the grinding machine and moving the clamping assembly toward the cylindrical fragile part until the clamping assembly clamps the cylindrical fragile part specifically includes the following steps:

[0028] Magnetize the magnetic chuck of the grinding machine, press the end of the cylindrical fragile part away from the base surface toward the magnetic chuck while using a soft hammer to strike the clamping assembly toward the cylindrical fragile part until the clamping assembly clamps the cylindrical fragile part.

[0029] According to another aspect of the present invention, the present invention further provides a height-equalizing grinding apparatus for cylindrical fragile parts, comprising:

[0030] A cylindrical fragile component, wherein one end face of the cylindrical fragile component is a base surface;

[0031] A fastening ring is fitted onto the cylindrical fragile part;

[0032] A clamping assembly is mounted on the magnetic chuck of the grinding machine. The base surface of the cylindrical fragile part is attached to the magnetic chuck. The clamping assembly is located on the periphery of the cylindrical fragile part. The fastening ring is clamped between the cylindrical fragile part and the clamping assembly.

[0033] The drive mechanism magnetizes the magnetic chuck of the grinding machine, and drives the clamping assembly to move toward the cylindrical fragile part until the clamping assembly clamps the cylindrical fragile part.

[0034] A grinding assembly for grinding the cylindrical fragile part at the same height.

[0035] Compared with the prior art, the method and apparatus for grinding cylindrical fragile parts at equal heights provided by the present invention have the following advantages:

[0036] In this invention, a cylindrical fragile part is fixed to the magnetic chuck of a grinding machine by a clamping assembly. A fastening ring is set between the cylindrical fragile part and the clamping assembly. First, the outer diameter of the cylindrical fragile part is increased to ensure that the stop of the clamping assembly can be clamped at the required position, achieving precise positioning. Second, the deformation of the fastening ring increases the contact area, ensuring the fastening force. The stop and the fastening ring are initially pre-tightened in a "line contact" manner. After the magnetic chuck of the grinding machine is magnetized, it is struck towards the cylindrical fragile part to compress the fastening ring. The fastening ring undergoes plastic deformation under compression, increasing the contact area and changing the contact method between the stop and the fastening ring, and between the fastening ring and the cylindrical fragile part, to a "surface contact" manner, increasing the fastening force. Finally, the fastening ring acts as a buffer to prevent the impact force of the strike from directly acting on the cylindrical fragile part and causing cracking. Attached Figure Description

[0037] The preferred embodiments will now be described in a clear and easy-to-understand manner, in conjunction with the accompanying drawings, to further explain the above-mentioned characteristics, technical features, advantages, and implementation methods of the present invention.

[0038] Figure 1 This is a schematic diagram of the clamping structure for equal-height grinding of cylindrical fragile parts in the prior art;

[0039] Figure 2 It is an isometric drawing of the clamping process for grinding cylindrical fragile parts at the same height in the existing technology;

[0040] Figure 3 This is a flowchart of a preferred embodiment of the present invention: a method for grinding cylindrical fragile parts at equal heights.

[0041] Figure 4 This is a schematic diagram of the preferred embodiment of the cylindrical fragile part equal-height grinding device of the present invention;

[0042] Figure 5 This is a three-dimensional structural diagram of a preferred embodiment of the cylindrical fragile part equal-height grinding device of the present invention.

[0043] Explanation of icon numbers:

[0044] Cylindrical fragile part 1, stop block 2, fastening ring 3. Detailed Implementation

[0045] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.

[0046] To keep the drawings concise, each figure only schematically shows the parts relevant to the invention, and these do not represent the actual structure of the product. Furthermore, to facilitate understanding, in some figures, only one of components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0047] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0048] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0050] In one embodiment, refer to the appendix to the specification. Figure 3 The present invention provides a method for grinding cylindrical fragile parts at equal heights, comprising the following steps:

[0051] S100. Select one end face of the cylindrical fragile part as the base surface;

[0052] Specifically, cylindrical fragile parts refer to cylindrical blanks made of ceramic materials, magnetic materials, etc., where one end face of the cut-off cylindrical fragile part is used as the base surface for equal-height machining. Of course, the same method can be used for blanks of other shapes, such as elliptical blanks.

[0053] S200. Fit the fastening ring onto the cylindrical fragile part;

[0054] Specifically, the fastening ring is placed on the upper-middle part of the cylindrical fragile part, away from the base surface. Preferably, the fastening ring is placed at a height of 2 / 3 to 3 / 4 of the base surface of the cylindrical fragile part. If the fastening ring is placed on the lower-middle part of the cylindrical fragile part, away from the base surface, the workpiece is prone to tipping over and being damaged during grinding.

[0055] The fastening ring is malleable, allowing it to absorb impact through plastic deformation and securely fasten to the outer circumference of the cylindrical, fragile part. Once tightened, the fastening ring remains secure. The fastening ring can be made of rubber, plastic, or nylon, with a width of at least 3mm and a thickness of at least 1mm. For example, the fastening ring could be a type of self-locking nylon cable tie.

[0056] S300. The clamping assembly is placed on the magnetic chuck of the grinding machine, and the base surface of the cylindrical fragile part is pressed against the magnetic chuck. The clamping assembly is located on the periphery of the cylindrical fragile part, and the fastening ring is clamped between the cylindrical fragile part and the clamping assembly.

[0057] Specifically, the clamping assembly includes several spaced-apart stops surrounding the cylindrical fragile part. These stops are magnetically secured by the grinding machine's magnetic chuck. The stops are evenly distributed around the cylindrical fragile part, with the height of each stop not exceeding the finished height of the cylindrical fragile part after processing, and not less than 2 / 3 of the initial height of the cylindrical fragile part. The stops can be square columnar structures, L-shaped structures, etc., and are metal parts that can be magnetically secured by the magnetic chuck. There can be three, four, five, six, or more stops. For example, if four stops are provided, they are arranged in pairs opposite each other to block the cylindrical fragile part in the X and Y directions. The two sets of stops are then pressed tightly against the fastening rings on the cylindrical fragile part. If a tight fit is not possible, a thicker fastening ring is selected to ensure precise clamping and positioning.

[0058] It should be noted that the clamping components are described with reference to the accompanying drawings in the specification. In actual use, different clamping components may be selected depending on the device. Any structure or device that can clamp the cylindrical fragile parts is acceptable. This is only for better illustrating the present invention and should not be construed as a limitation of the present invention.

[0059] S400. Magnetize the magnetic chuck of the grinding machine and move the clamping assembly toward the cylindrical fragile part until the clamping assembly clamps the cylindrical fragile part.

[0060] Specifically, the magnetic chuck of the grinding machine is magnetized, and while pressing the end of the cylindrical fragile part away from the base surface toward the magnetic chuck, a soft hammer is used to strike the stop of the clamping assembly toward the cylindrical fragile part until the clamping assembly clamps the cylindrical fragile part.

[0061] S500, perform equal-height grinding on the cylindrical fragile part.

[0062] This invention reduces the need for machining and modifying the cylindrical surface of the fragile cylindrical part before clamping. By adding an adjustable plastic fastening ring to the cylindrical surface of the fragile cylindrical part, when the stop block is used to clamp the part, the adjustable plastic fastening ring avoids direct contact between the stop block and the fragile cylindrical part, thus preventing damage during clamping. Furthermore, the plastic deformation of the fastening ring material increases the contact area, making it easier to clamp the fragile cylindrical part. This invention reduces machining steps, avoids material cracking, and saves raw materials.

[0063] According to another aspect of the invention, reference is made to the appended specification. Figure 4 , Figure 5 The present invention further provides a height-equalizing grinding device for a cylindrical fragile part, comprising: a cylindrical fragile part 1, a fastening ring 3, a clamping assembly, a driving mechanism, and a grinding assembly. One end face of the cylindrical fragile part 1 is a base surface, and the fastening ring 3 is sleeved on the cylindrical fragile part 1. The clamping assembly is disposed on the magnetic chuck of the grinding machine, with the base surface of the cylindrical fragile part 1 in close contact with the magnetic chuck. The clamping assembly is located on the periphery of the cylindrical fragile part 1, and the fastening ring 3 is clamped between the cylindrical fragile part 1 and the clamping assembly. After the magnetic chuck of the grinding machine is magnetized, the driving mechanism drives the clamping assembly to move towards the cylindrical fragile part 1 until the clamping assembly clamps the cylindrical fragile part 1. The grinding assembly is used to perform height-equalizing grinding on the cylindrical fragile part 1.

[0064] Specifically, refer to the instruction manual appendix. Figure 4 , Figure 5 Cylindrical fragile part 1 refers to a cylindrical blank workpiece made of ceramic materials, magnetic materials, etc., with one end face of the cut-off cylindrical fragile part 1 serving as the base surface for equal-height machining. Of course, the same method can be used for blank workpieces of other shapes, such as elliptical blank workpieces.

[0065] The fastening ring 3 is malleable, and upon impact, it mitigates the impact force through plastic deformation, while remaining securely fastened to the outer circumference of the cylindrical fragile part 1. The fastening ring 3 does not loosen after fastening. The fastening ring 3 can be made of rubber, plastic, or nylon, with a width of not less than 3mm and a thickness of not less than 1mm. For example, the fastening ring 3 can be a type of self-locking nylon cable tie.

[0066] The clamping assembly includes several spaced-apart stops 2, which surround the cylindrical fragile part 1. The stops 2 can be magnetically secured by the grinding machine's magnetic chuck. The stops 2 are evenly distributed around the cylindrical fragile part 1, with the height of each stop 2 not exceeding the finished height of the cylindrical fragile part 1 after processing, and not less than 2 / 3 of the initial height of the cylindrical fragile part 1. The stops 2 can be square columnar structures, L-shaped structures, etc., and are metal parts that can be magnetically secured by the magnetic chuck. There can be three, four, five, six, or more stops 2. For example, if four stops 2 are provided, they are arranged in pairs opposite each other to block the cylindrical fragile part 1 in the X and Y directions. The two sets of stops 2 are pressed tightly against the fastening rings 3 on the cylindrical fragile part 1. If they cannot be pressed tightly, a thicker fastening ring 3 is selected to ensure precise clamping and positioning.

[0067] For example, one end face of the cylindrical fragile part 1 is selected as the base surface, and a plastic fastening ring 3 with a thickness of 1.5 mm and a width of 5 mm is placed on the outer circle at a distance of 2 / 3 to 3 / 4 of the total height from the base surface. For example, the fastening ring 3 is a nylon cable tie. Other auxiliary processes are eliminated, and it is directly clamped on the magnetic chuck of the grinding machine, which greatly improves the processing efficiency and reduces material waste.

[0068] In this embodiment, the grinding machine performs equal-height machining. The cylindrical fragile part 1 is fixed to the magnetic chuck of the grinding machine by a clamping assembly. A fastening ring 3 is set between the cylindrical fragile part 1 and the clamping assembly. First, the outer diameter of the cylindrical fragile part 1 is increased to ensure that the stop 2 of the clamping assembly can be clamped at the required position, achieving precise positioning. Second, the deformation of the fastening ring 3 increases the contact area, ensuring the fastening force. The stop 2 and the fastening ring 3 are initially pre-tightened in a "line contact" manner. After the magnetic chuck of the grinding machine is magnetized, it is struck towards the cylindrical fragile part 1 to compress the fastening ring 3. The fastening ring 3 undergoes plastic deformation under compression, increasing the contact area. This changes the contact method between the stop 2 and the fastening ring 3, and between the fastening ring 3 and the cylindrical fragile part 1, to a "surface contact" manner, increasing the fastening force. Finally, the fastening ring 3 acts as a buffer to prevent the impact force of the strike from directly acting on the cylindrical fragile part 1, causing cracking. It has been verified that the self-locking nylon cable ties conveniently achieve the clamping function and are easy to operate.

[0069] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0070] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method of isometrically grinding a cylindrical frangible article, characterized by, The method comprises the steps of: selecting one end surface of the cylindrical fragile piece as a base surface; sleeving a fastening ring on the cylindrical fragile piece; arranging a clamping assembly on a magnetic chuck of a grinding machine, and tightly attaching the base surface of the cylindrical fragile piece to the magnetic chuck, wherein the clamping assembly is located on the periphery of the cylindrical fragile piece, and the fastening ring is clamped between the cylindrical fragile piece and the clamping assembly; magnetizing the magnetic chuck of the grinding machine, and moving the clamping assembly towards the cylindrical fragile piece, wherein the fastening ring is plastically deformed under extrusion to increase the contact area, so that the contact mode between the stop block of the clamping assembly and the fastening ring, and the contact mode between the fastening ring and the cylindrical fragile piece are changed to surface contact mode, until the clamping assembly clamps the cylindrical fragile piece, wherein the clamping assembly comprises a plurality of stop blocks arranged at intervals, the stop blocks are arranged around the periphery of the cylindrical fragile piece, and the stop blocks can be magnetically fixed by the magnetic chuck of the grinding machine; performing isometric grinding on the cylindrical fragile piece.

2. The cylindrical friable article isoplanar grinding method of claim 1, wherein, The step of sleeving the fastening ring on the cylindrical fragile piece comprises the steps of: sleeving the fastening ring on the middle and upper part of the end of the cylindrical fragile piece away from the base surface.

3. The isometric grinding method of the cylindrical fragile piece according to claim 2, wherein the fastening ring is located at a position with a height of 2 / 3-3 / 4 of the cylindrical fragile piece away from the base surface.

4. The isometric grinding method of the cylindrical fragile piece according to claim 1, wherein the fastening ring has plasticity.

5. The isometric grinding method of the cylindrical fragile piece according to claim 4, wherein the fastening ring is made of rubber, plastic or nylon, the width of the fastening ring is not less than 3 mm, and the thickness of the fastening ring is not less than 1 mm.

6. The isometric grinding method of the cylindrical fragile piece according to claim 5, wherein the fastening ring is a self-locking nylon cable tie.

7. The isometric grinding method of the cylindrical fragile piece according to claim 6, wherein the stop blocks are uniformly arranged around the periphery of the cylindrical fragile piece, the height of the stop blocks is not higher than the height of the finished product of the cylindrical fragile piece, and the height of the stop blocks is not less than 2 / 3 of the initial height of the cylindrical fragile piece. The step of magnetizing the magnetic chuck of the grinding machine, and moving the clamping assembly towards the cylindrical fragile piece until the clamping assembly clamps the cylindrical fragile piece comprises the steps of: magnetizing the magnetic chuck of the grinding machine, pressing the end of the cylindrical fragile piece away from the base surface towards the magnetic chuck, and using a soft hammer to knock the clamping assembly towards the cylindrical fragile piece until the clamping assembly clamps the cylindrical fragile piece. The method comprises the steps of: a cylindrical fragile piece, one end surface of the cylindrical fragile piece being a base surface; a fastening ring sleeved on the cylindrical fragile piece; 8. The cylindrical brittle mass isohypse grinding method according to claim 1, characterized by, a clamping assembly arranged on a magnetic chuck of a grinding machine, the base surface of the cylindrical fragile piece being tightly attached to the magnetic chuck, the clamping assembly being located on the periphery of the cylindrical fragile piece, and the fastening ring being clamped between the cylindrical fragile piece and the clamping assembly. ​ 9. A cylindrical friable article isometric grinding apparatus, characterized by, ​ ​ ​ ​ A driving mechanism magnetizes the magnetic chuck of the grinder, and drives the clamping assembly to move towards the cylindrical fragile object until the clamping assembly clamps the cylindrical fragile object; A grinding assembly for isometrically grinding the cylindrical fragile object; The plastic deformation of the fastening ring under extrusion increases the contact area, so that the contact between the stop block of the clamping assembly and the fastening ring, and the contact between the fastening ring and the cylindrical fragile object become surface contact, the clamping assembly includes a plurality of spaced stop blocks, and the stop blocks are arranged around the cylindrical fragile object, and the stop blocks can be magnetically fixed by the magnetic chuck of the grinder.

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