Equal-height grinding method and device for cylindrical fragile parts

Abstract

The invention discloses an equal-height grinding method and device for a cylindrical fragile part. The method comprises the steps that one end face of the cylindrical fragile part is selected as a base face; a fastening ring is arranged on the cylindrical fragile piece in a sleeving mode; the clamping assembly is arranged on a magnetic suction cup of a grinding machine, the base face of the cylindrical fragile part is tightly attached to the magnetic suction cup, the clamping assembly is located on the peripheral side of the cylindrical fragile part, and the fastening ring is arranged between the cylindrical fragile part and the clamping assembly in a clamped mode; a magnetic suction cup of the grinding machine is magnetized, and the clamping assembly is moved in the direction close to the cylindrical fragile part till the cylindrical fragile part is clamped by the clamping assembly; and performing equal-height grinding on the cylindrical fragile part. According to the equal-height grinding method and device for the cylindrical fragile part, the machining time can be effectively shortened, raw materials are saved, and the cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of grinding technology, and further to a method and device for grinding cylindrical fragile parts at equal heights. Background Art

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

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

[0004] 2. Change 180° to grind a second plane parallel to the first plane on the cylindrical surface;

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

[0006] 4. Change 180° to grind a fourth plane parallel to the third plane on the cylindrical surface;

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

[0008] 6. Use a top block to clamp the cylindrical fragile part on the grinder and then grind the other end surface of the cylindrical fragile part;

[0009] Obtain workpieces with higher parallelism.

[0010] The above process steps 1 to 5 are mainly to meet the clamping requirements of process 6. The outer circle of the blank produced normally is uneven and the outer roundness is very poor. When the grinder is used to process the parallelism of the two ends of the workpiece blank, the workpiece cannot be tightened during clamping, resulting in loosening during the grinding process of the grinder, causing parallelism deviation and even damage to the workpiece. The reasons why the block cannot clamp the cylindrical blank: 1. The uneven cylindrical surface of the blank causes the contact between the block and the workpiece to be "point contact". The block cannot be clamped at the convex point of the outer circle, resulting in loosening of the workpiece during grinding; 2. The outer roundness is out of tolerance and the surface height is undulating. It is impossible to ensure that the contact point between the block and the workpiece is in the middle and upper part of the workpiece. If the contact point is in the lower part of the workpiece blank, the workpiece is prone to tipping over and damage during grinding. At present, this process can only be used for fragile materials. Two sets of planes are machined on the cylindrical surface of the workpiece blank to be perpendicular to an end face (base surface), that is, the X, Y, and Z directions are all perpendicular to ensure that the block and the workpiece blank are in "face contact" when clamping. Please refer to Figure 1 , Figure 2In the conventional processing technology, in order to ensure that step 6 is firmly clamped, five steps are required to pave the way, and the process is complicated. In addition, the radial size of the blank raw material is reduced because of the need for initial grinding of the outer circle, resulting in a waste of raw materials.

[0011] Therefore, providing a method and device for high-grinding of cylindrical fragile parts has always been a problem that ordinary technicians in this field need to solve urgently. Summary of the invention

[0012] In view of the above technical problems, the purpose of the present invention is to provide a method and device for grinding cylindrical fragile parts at equal heights, so as to solve the technical problems in the above background, shorten the processing time and save raw materials.

[0013] In order to achieve the above object, the present invention provides a method for grinding cylindrical fragile parts with equal height, comprising the steps of:

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

[0015] Sleeve a fastening ring onto the cylindrical fragile part;

[0016] The clamping assembly is arranged 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 peripheral side of the cylindrical fragile part, and the fastening ring is clamped between the cylindrical fragile part and the clamping assembly;

[0017] 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;

[0018] The cylindrical fragile part is ground to uniform height.

[0019] In some embodiments, the step of sleeve-arranging the fastening ring on the cylindrical fragile member specifically comprises the steps of:

[0020] The fastening ring is sleeved on the middle and upper part of the end of the cylindrical fragile part away from the base surface.

[0021] In some embodiments, the fastening ring is located at a height of 2 / 3-3 / 4 from the base surface of the cylindrical frangible member.

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

[0023] In some embodiments, 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.

[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 stoppers, the plurality of stoppers are disposed around the cylindrical fragile part, and the stoppers can be fixed by magnetic suction cups of the grinder.

[0026] In some embodiments, a plurality of the stoppers are evenly arranged around the cylindrical fragile part, the height of the stoppers is not higher than the height of the finished product of the cylindrical fragile part after processing, and the height of the stoppers is not lower 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 comprises the following steps:

[0028] The magnetic suction cup of the grinder is magnetized, and while pressing the end of the cylindrical fragile part away from the base surface toward the magnetic suction cup, a soft hammer is used to knock 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 cylindrical fragile part iso-grinding device, comprising:

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

[0031] A fastening ring, sleeved on the cylindrical fragile part;

[0032] A clamping assembly is arranged on the magnetic chuck of the grinding machine, the base surface of the cylindrical fragile part is in close contact with the magnetic chuck, the clamping assembly is located on the peripheral side of the cylindrical fragile part, and the fastening ring is clamped between the cylindrical fragile part and the clamping assembly;

[0033] A driving mechanism is used to magnetize the magnetic chuck of the grinding machine, and the driving mechanism drives the clamping assembly to move toward the cylindrical fragile part until the clamping assembly clamps the cylindrical fragile part;

[0034] The grinding assembly is used for performing iso-height grinding on the cylindrical fragile part.

[0035] Compared with the prior art, the method and device for grinding cylindrical fragile parts with equal height provided by the present invention have the following beneficial effects:

[0036] In the present invention, the cylindrical fragile part is fixed on the magnetic suction cup of the grinder by a clamping assembly, and a fastening ring is arranged between the cylindrical fragile part and the clamping assembly; firstly, the outer diameter of the cylindrical fragile part is increased to ensure that the block of the clamping assembly can be clamped at the position where it needs to be clamped, thereby achieving precise positioning; secondly, the deformation of the fastening ring increases the contact area to ensure the fastening force, and the block and the fastening ring are first pre-tightened in a "line contact" manner. After the magnetic suction cup of the grinder is magnetized, the block is knocked in a direction close to the cylindrical fragile part to extrude the fastening ring. The fastening ring undergoes plastic deformation under extrusion to increase the contact area, so that the contact mode between the block and the fastening ring, and between the fastening ring and the cylindrical fragile part becomes a "surface contact" mode, thereby increasing the fastening force; finally, the fastening ring acts as a buffer to prevent the impact force of the knocking from directly acting on the cylindrical fragile part and causing cracking. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

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

[0039] Figure 2 It is a clamping axonometric diagram of equal height grinding of cylindrical fragile parts in the prior art;

[0040] Figure 3 is a flow chart of a method for grinding cylindrical fragile parts with equal height according to a preferred embodiment of the present invention;

[0041] Figure 4 It is a schematic structural diagram of a cylindrical fragile component iso-grinding device according to a preferred embodiment of the present invention;

[0042] Figure 5 It is a schematic diagram of the three-dimensional structure of the cylindrical fragile part isotropic grinding device according to the preferred embodiment of the present invention.

[0043] Description of Figure Numbers:

[0044] Cylindrical fragile part 1, stopper 2, fastening ring 3. DETAILED DESCRIPTION

[0045] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0046] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0047] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0048] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0050] In one embodiment, the reference specification Figure 3 The present invention provides a method for grinding cylindrical fragile parts with equal height, comprising the steps of:

[0051] S100, selecting an end surface of a cylindrical fragile part as a base surface;

[0052] Specifically, the cylindrical fragile part refers to a cylindrical rough workpiece of ceramic material, magnetic material, etc., and one end surface of the truncated cylindrical fragile part is used as the base surface for iso-height processing. Of course, for rough workpieces of other shapes, the same method can also be used, such as elliptical rough workpieces, etc.

[0053] S200, sleeve a fastening ring onto the cylindrical fragile part;

[0054] Specifically, the fastening ring is set at the middle and upper part of the end of the cylindrical fragile part away from the base surface, preferably at a height of 2 / 3-3 / 4 from the base surface of the cylindrical fragile part. If the fastening ring is set at the middle and lower part of the end of the cylindrical fragile part away from the base surface, the workpiece is easy to tip over and be damaged during grinding.

[0055] The fastening ring has plasticity, and when impacted, it can relieve the impact force through plastic deformation, and is fastened to the outer circle of the cylindrical fragile part, and the fastening ring does not loosen after being fastened. The fastening ring can be made of rubber, plastic or nylon, and the width of the fastening ring is not less than 3mm, and the thickness of the fastening ring is not less than 1mm. For example, the fastening ring is a self-locking nylon cable tie.

[0056] S300, placing the clamping assembly on the magnetic chuck of the grinding machine, and placing the base surface of the cylindrical fragile part close to the magnetic chuck, wherein the clamping assembly is located on the circumference 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 a number of spaced-apart blocks, which are arranged around the cylindrical fragile part, and the blocks can be fixed by the magnetic suction cup of the grinder. The number of blocks are evenly arranged around the cylindrical fragile part, and the height of the blocks is not higher than the height of the finished product after the cylindrical fragile part is processed, and the height of the blocks is not lower than 2 / 3 of the initial height of the cylindrical fragile part. The block can be a square columnar structure, an L-shaped structure, etc. The block is a metal part that can be fixed by the magnetic suction cup, and the block can be set to three, four, five, six or more. If there are four blocks, two of them are arranged opposite to each other to block the cylindrical fragile part in the X and Y directions. The two groups of blocks are tightly attached to the fastening rings on the cylindrical fragile part. If they cannot be tightly attached, a fastening ring with a larger thickness is selected to ensure accurate clamping and positioning.

[0058] It should be pointed out that the clamping assembly is described in correspondence with the drawings in the specification. In actual use, different clamping assemblies may be selected according to different devices, as long as the structure or device can be used to clamp the cylindrical fragile parts. This is only for better illustrating the present invention and should not constitute a limitation to the present invention.

[0059] S400, 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;

[0060] Specifically, the magnetic suction cup of the grinder is magnetized, and while the end of the cylindrical fragile part away from the base surface is pressed toward the magnetic suction cup, a soft hammer is used to knock the stopper of the clamping assembly toward the cylindrical fragile part until the clamping assembly clamps the cylindrical fragile part.

[0061] S500, performing isohyper-grinding on the cylindrical fragile part.

[0062] In the present invention, the process of processing and correcting the cylindrical surface of the blank of the cylindrical fragile part before clamping is reduced. By adding a circle of adjustable plastic fastening ring on the cylindrical surface of the cylindrical fragile part, when the stopper is struck to clamp the cylindrical fragile part, the adjustable plastic fastening ring not only avoids direct contact between the stopper and the cylindrical fragile part, which causes damage to the cylindrical fragile part during clamping, but also increases the contact area due to the plastic deformation of the fastening ring material, making it easier to clamp the cylindrical fragile part. The present invention reduces the processing process, avoids material cracking, and saves raw materials.

[0063] According to another aspect of the present invention, Figure 4 , Figure 5 The present invention further provides a device for contour grinding of cylindrical fragile parts, comprising: a cylindrical fragile part 1, a fastening ring 3, a clamping assembly, a driving mechanism and a grinding assembly, wherein one end face of the cylindrical fragile part 1 is a base face, and the fastening ring 3 is sleeved on the cylindrical fragile part 1; the clamping assembly is arranged on the magnetic suction cup of the grinder, the base face of the cylindrical fragile part 1 is close to the magnetic suction cup, the clamping assembly is located on the circumferential side 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 suction cup of the grinder is magnetized, the driving mechanism drives the clamping assembly to move in a direction close to the cylindrical fragile part 1 until the clamping assembly clamps the cylindrical fragile part 1; the grinding assembly is used for contour grinding of the cylindrical fragile part 1.

[0064] Specifically, refer to the attached manual Figure 4 , Figure 5 The cylindrical fragile part 1 refers to a cylindrical rough workpiece of ceramic material, magnetic material, etc., and one end surface of the truncated cylindrical fragile part 1 is used as the base surface for iso-height processing. Of course, for rough workpieces of other shapes, the same method can also be used, such as elliptical rough workpieces, etc.

[0065] The fastening ring 3 has plasticity, and when impacted, it can relieve the impact force through plastic deformation, and is fastened to the outer circle of the cylindrical fragile part 1, and the fastening ring 3 does not loosen after being fastened. The fastening ring 3 can be made of rubber, plastic or nylon, and the width of the fastening ring 3 is not less than 3mm, and the thickness of the fastening ring 3 is not less than 1mm. For example, the fastening ring 3 is a self-locking nylon cable tie.

[0066] The clamping assembly includes a plurality of stoppers 2 arranged at intervals, and the plurality of stoppers 2 are arranged around the cylindrical fragile part 1, and the stoppers 2 can be fixed by magnetic suction of the grinding machine. The plurality of stoppers 2 are evenly arranged around the cylindrical fragile part 1, and the height of the stoppers 2 is not higher than the height of the finished product of the cylindrical fragile part 1 after processing, and the height of the stoppers 2 is not lower than 2 / 3 of the initial height of the cylindrical fragile part 1. The stoppers 2 can be square columnar structures, L-shaped structures, etc. The stoppers 2 are metal parts that can be fixed by magnetic suction of the magnetic suction cup, and the stoppers 2 can be set to three, four, five, six or more. If there are four stoppers 2, two of them are arranged opposite to each other to block the cylindrical fragile part 1 in the X and Y directions. The two groups of stoppers 2 are tightly attached to the fastening rings 3 on the cylindrical fragile part 1. If they cannot be tightly attached, a fastening ring 3 with a larger thickness is selected to ensure accurate clamping and positioning.

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

[0068] In this embodiment, isometric processing is implemented on the grinding machine, and the cylindrical fragile part 1 is fixed on the magnetic suction cup of the grinding machine through a clamping assembly, and a fastening ring 3 is arranged between the cylindrical fragile part 1 and the clamping assembly; firstly, the outer diameter size of the cylindrical fragile part 1 is increased to ensure that the block 2 of the clamping assembly can be clamped at the position where it needs to be clamped, thereby achieving precise positioning; secondly, the deformation of the fastening ring 3 increases the contact area to ensure the fastening force, and the block 2 and the fastening ring 3 are first pre-tightened in a "line contact" manner. After the magnetic suction cup of the grinder is magnetized, the block 2 is knocked in the direction close to the cylindrical fragile part 1 to squeeze the fastening ring 3. The fastening ring 3 undergoes plastic deformation under extrusion to increase the contact area, so that the contact mode between the block 2 and the fastening ring 3, and the fastening ring 3 and the cylindrical fragile part 1 is changed to a "surface contact" mode, thereby increasing the fastening force; finally, the fastening ring 3 acts as a buffer to prevent the impact force of the knocking from directly acting on the cylindrical fragile part 1 and causing cracking. It has been proven that the clamping function is conveniently achieved using self-locking nylon cable ties, which is easy to operate.

[0069] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made 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 only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A method for grinding cylindrical fragile parts with equal height, characterized in that: Includes steps: Select one end surface of a cylindrical fragile part as the base surface; Sleeve a fastening ring onto the cylindrical fragile part; The clamping assembly is arranged 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 peripheral side of the cylindrical fragile part, and the fastening ring is clamped between the cylindrical fragile part and the clamping assembly; 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; The cylindrical fragile part is ground to uniform height.

2. The method for grinding cylindrical fragile parts with equal height according to claim 1, characterized in that: The step of sleeve-arranging the fastening ring on the cylindrical fragile part specifically comprises the following steps: The fastening ring is sleeved on the middle and upper part of the end of the cylindrical fragile part away from the base surface.

3. The method for grinding cylindrical fragile parts with equal height according to claim 2, characterized in that: The fastening ring is located at a height of 2 / 3-3 / 4 from the base surface of the cylindrical fragile part.

4. The method for grinding cylindrical fragile parts with equal height according to claim 1, characterized in that: The fastening ring has plasticity.

5. The method for grinding cylindrical fragile parts with equal height according to claim 4, characterized in that: 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 method for grinding cylindrical fragile parts with equal height according to claim 5, characterized in that: The fastening ring is a self-locking nylon cable tie.

7. The method for grinding cylindrical fragile parts with equal height according to claim 1, characterized in that: The clamping assembly comprises a plurality of stoppers arranged at intervals, the plurality of stoppers are arranged around the cylindrical fragile part, and the stoppers can be fixed by magnetic suction of the grinding machine.

8. The method for grinding cylindrical fragile parts with equal height according to claim 7, characterized in that: A plurality of the stoppers are evenly arranged around the cylindrical fragile part, the height of the stoppers is not higher than the height of the finished product of the cylindrical fragile part after processing, and the height of the stoppers is not lower than 2 / 3 of the initial height of the cylindrical fragile part.

9. The method for grinding cylindrical fragile parts with equal height according to claim 1, characterized in that: The method 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: The magnetic suction cup of the grinder is magnetized, and while pressing the end of the cylindrical fragile part away from the base surface toward the magnetic suction cup, a soft hammer is used to knock the clamping assembly toward the cylindrical fragile part until the clamping assembly clamps the cylindrical fragile part.

10. A cylindrical fragile part contour grinding device, characterized in that: include: A cylindrical fragile part, wherein one end surface of the cylindrical fragile part is a base surface; A fastening ring, sleeved on the cylindrical fragile part; A clamping assembly is arranged on the magnetic chuck of the grinding machine, the base surface of the cylindrical fragile part is in close contact with the magnetic chuck, the clamping assembly is located on the peripheral side of the cylindrical fragile part, and the fastening ring is clamped between the cylindrical fragile part and the clamping assembly; A driving mechanism is used to magnetize the magnetic chuck of the grinding machine, and the driving mechanism drives the clamping assembly to move toward the cylindrical fragile part until the clamping assembly clamps the cylindrical fragile part; The grinding assembly is used for performing iso-height grinding on the cylindrical fragile part.

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