End face grinding device and method

Abstract

The end face grinding device used for grinding the to-be-ground piece is provided, the to-be-ground piece comprises a first end face and a second end face which are located at the two ends of the to-be-ground piece respectively, the device comprises a platform, a rotating disc, a monitoring assembly and a guide base, and the platform is used for providing a horizontal plane; the turntable is arranged on the platform, can rotate and is used for providing a grinding disc surface; the monitoring assembly comprises a supporting piece and a size detection piece connected with the supporting piece. The size detection piece is used for monitoring the second end face. The guide base is movably matched with the grinding disc face in a contact mode, a plurality of through holes are formed in the guide base, one part of the through holes are used for fixing the supporting pieces, the other part of the through holes are used for allowing the to-be-ground pieces to be inserted, and the to-be-ground pieces promote grinding between the first end face and the grinding disc face by means of the gravity of the to-be-ground pieces; the size detection piece judges the grinding amount of the first end face by monitoring the change of the distance between the size detection piece and the second end face. The invention further provides an end face grinding method. The device has a better grinding effect and can monitor the grinding effect in real time.

Description

Technical Field

[0001] The invention relates to the field of grinding tools, in particular to the field of end face grinding. Background Art

[0002] End face grinding is mainly used for precision machining of the end face of the workpiece to achieve the flatness, finish and dimensional accuracy required by the process. At present, most end face grinding devices are for workpieces with small aspect ratio and light weight, and are carried out manually or automatically. For some workpieces with large aspect ratio, the grinding efficiency is low and the stability is poor; it is impossible to measure and confirm the grinding effect during the grinding process. Summary of the invention

[0003] An object of the present invention is to provide an end face grinding device which has a better grinding effect and can monitor the grinding effect in real time.

[0004] To achieve the above-mentioned purpose, an end face grinding device is used to grind a workpiece to be ground, wherein the workpiece to be ground comprises a first end face and a second end face respectively located at two ends of the workpiece to be ground, and the device comprises a platform, a turntable, a monitoring assembly and a guide base, wherein the platform is used to provide a horizontal plane; the turntable is arranged on the platform and can rotate to provide a grinding disc surface; the monitoring assembly comprises a support member and a size detection member connected to the support member, wherein the size detection member is used to monitor the second end face; the guide base is movably contacted and matched with the grinding disc surface, and a plurality of through holes are provided on the guide base, wherein a part of the through holes is used to fix the support member, and another part of the through holes is used to insert one or more of the workpieces to be ground, wherein the workpiece to be ground promotes the grinding between the first end face and the grinding disc surface by its own gravity;

[0005] The size detection component determines the grinding amount of the first end surface by monitoring the change in the distance between the size detection component and the second end surface.

[0006] In one or more embodiments, the part to be worn is a part weighing more than 2KG.

[0007] In one or more embodiments, the workpiece to be polished is a slender rod.

[0008] In one or more embodiments, the support member includes a pillar and a cantilever, the pillar is fixed in the through hole, one end of the cantilever is connected to the pillar so as to be movably connected up and down, and the other end is connected to the size detection member.

[0009] In one or more embodiments, the size detection component is a micrometer or a laser sensor.

[0010] In one or more embodiments, the guide base and / or the support member are made of bakelite.

[0011] In one or more embodiments, the guide base is configured to be moved relative to the turntable by manual or automatic drive.

[0012] In one or more embodiments, a radial clearance between the through hole and the workpiece to be worn is maintained in the range of 0.4 to 0.5 mm on one side.

[0013] In one or more embodiments, the platform is provided with a groove, and the turntable is rotatably disposed in the groove.

[0014] In one or more embodiments, the support member is a retractable member to adjust its own height.

[0015] Another object of the present invention is to provide an end surface grinding method using the end surface grinding device, the method comprising the following steps:

[0016] Inserting a plurality of parts to be ground into the through holes to form a whole with the guide base;

[0017] The first end surface is brought into contact with the rotating disk, and the size detection member is directed toward the second end surface of the workpiece to be ground;

[0018] The turntable is rotated, the guide base is moved relative to the turntable, and the plurality of workpieces to be ground are ground simultaneously. The grinding amount of the first end face is determined by monitoring the change in the distance between the second end face and the probe through the size detection part.

[0019] The above end surface grinding device has the following advantages:

[0020] (1) The guide base is used to fix multiple pieces to be ground into a whole, ensuring the overall stability of the workpiece during grinding, and multiple pieces can be ground at the same time, improving efficiency;

[0021] (2) Use the dimension detection part at the other end to monitor the dimension of the second end face in real time, so as to monitor the grinding amount and avoid the problem of excessive grinding amount leading to over-tolerance of part dimension or insufficient grinding amount;

[0022] (3) It is suitable for heavy parts and can improve the grinding effect of the end face by using its own gravity, reducing the additional axial force required for grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0024] Figure 1 is a schematic diagram of a grinding part;

[0025] Figure 2 is a schematic diagram of an end face grinding device.

[0026] Figure 3 It is a schematic diagram of the fuel injector;

[0027] Figure 4 It is a schematic diagram of the injector plug in the grinding process.

[0028] Symbols and Markings

[0029] 5 Parts to be polished

[0030] 11 Platform

[0031] 12 Turntable

[0032] 13 Monitoring Components

[0033] 14 Guide base

[0034] 111 Groove

[0035] 120 grinding disc surface

[0036] 131 Support

[0037] 132 Dimensional inspection parts

[0038] 140 Through hole

[0039] 100 First end face

[0040] 200 Second end face

[0041] 1310 Pillar

[0042] 1311 Cantilever

[0043] 300 Injector DETAILED DESCRIPTION

[0044] The present invention is further described below in conjunction with specific embodiments and drawings. More details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description herein. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0045] It should be noted that these and other subsequent drawings are only examples and are not drawn to scale, and should not be used to limit the actual scope of protection required by the present invention.

[0046] During the grinding process, the end face of the workpiece is ground by evenly distributing abrasives, abrasives or grinding pastes on the grinding disc surface, and grinding the end face of the workpiece under appropriate pressure and motion control, so as to remove extremely small materials on the surface of the workpiece and make its surface smoother and flatter.

[0047] At present, most end face grinding devices use manual or automatic methods to grind workpieces, but the grinding effect cannot be monitored in real time during the grinding process. If the grinding amount is too much, it is easy to cause the part size to be out of tolerance.

[0048] Based on this, the present disclosure proposes an end surface grinding device for grinding a workpiece 5 having a first end surface 100 and a second end surface 200. The first end surface and the second end surface are respectively located at two ends of the workpiece, and the first end surface is the surface to be ground.

[0049] Based on the structure of the workpiece to be ground, the end surface grinding device 10 includes a platform 11 , a turntable 12 , a monitoring component 13 and a guide base 14 .

[0050] The turntable 12 is arranged on the platform 11, and the platform 11 is used to provide a horizontal surface. The platform 11 has a centering and leveling function, which can always ensure that the end surface of the platform 11 is in a horizontal state. Figure 2 In the illustrated embodiment, the platform 11 is provided with a groove 111 , and the turntable 12 is rotatably disposed in the groove 111 .

[0051] The turntable 12 is disposed on the platform 11 and can rotate along its own axis to provide a grinding disc surface 120. For example, the turntable 12 is fixed to the platform 11 via a rotating shaft and driven to rotate by a motor. Figure 2 In the embodiment shown, the turntable 12 is an annular turntable, and the material includes but is not limited to wear-resistant stainless steel or marble, etc. During operation, the turntable 2 rotates at a certain speed, and according to the end surface flatness requirement of the part to be ground, a suitable grinding paste is sprayed on the grinding disk surface 120 of the turntable 12.

[0052] The guide base 14 is arranged on the turntable 12, and the monitoring assembly 13 is arranged on the guide base. The monitoring assembly 13 includes a support member 131 and a size detection member 132 connected to the support member 131. The guide base 14 is movably contacted and matched with the grinding disc surface 120. Among the multiple through holes 140 on the guide base 14, a part of the through holes 140 is used to fix the support member 131 of the monitoring assembly 13, and another part of the through holes 140 is for inserting the workpiece 5 to be ground, so that the first end face 100 is in contact with the grinding disc surface 120 for grinding. The size detection member 132 is used to monitor the second end face 200. Through the change in the distance between the probe of the size detection member 132 and the second end face 200, the staff can directly judge the grinding amount of the first end face.

[0053] Preferably, a micrometer with an accuracy of 0.001 mm is used to measure small height differences. The micrometer is connected to the tooling through a cantilever, and the grinding amount of the grinding part is detected during use. For example, the measuring head of the micrometer is placed on the second end face, and the micrometer value is read to obtain the flatness value. The size detection part 132 determines the grinding amount of the first end 100 by monitoring the change in the distance between the second end face 200. According to whether the measured maximum height difference is within the allowable tolerance range, it is determined whether the flatness of the plane meets the requirements.

[0054] The grinding piece 5 can be a cylindrical rod or other shapes. The weight of the grinding piece 5 is preferably greater than 2KG. It is vertically inserted into the through hole 140 to provide the axial force required for end face grinding by its own gravity, thereby improving the grinding effect between the first end face and the grinding disk surface.

[0055] In some embodiments, the support member 131 includes a pillar 1310 and a cantilever 1311 , and the pillar 1310 is fixed in the through hole 140 by means including but not limited to threaded connection, fastener connection, and snap-fit.

[0056] One end of the cantilever 1311 is connected to the pillar 1310 so as to be movable up and down, and the other end is connected to the dimension detection part 132. That is, when the other end of the cantilever 1311 is above the second end face 200 of the workpiece 5 to be ground, a dimension detection part, such as a micrometer, is fixed on the cantilever 1311. By monitoring the change in the distance between the upper end face of the part to be ground and the probe, the grinding amount of the part end face during the grinding process can be monitored in real time.

[0057] On the basis of the above embodiment, the cantilever 1311 is configured to move up and down relative to the support 1310 to meet the grinding and inspection requirements of workpieces of different heights. For example, the support 1310 is provided with a slide groove, and the cantilever cooperates with the slide groove through a slider to achieve up and down movement.

[0058] In other embodiments, the telescopic member 131 may be configured as a telescopic member with adjustable length. For example, the support 1310 includes a pair of rod-shaped members and a sleeve connected to the rod-shaped members, and the sleeve is used to adjust the relative distance between the pair of rod-shaped members, thereby adjusting the height of the support 1310.

[0059] Preferably, the support member 131 is made of bakelite, which is light in weight and has a large surface area, and does not affect the accuracy of grinding.

[0060] The measuring device of the dimension detection part 132 such as a micrometer or a laser sensor can be fine-tuned relative to the cantilever through a cantilever screw, etc., to ensure that the probe and the second end surface of the top of the workpiece are always within the effective measuring range to ensure accurate measurement results.

[0061] When the workpiece to be ground is a slender rod, it is preferred that the through hole and the workpiece have a radial clearance of 0.4 to 0.5 mm on one side to ensure that the workpiece can rotate freely and keep balance while following the tooling during the grinding process. Slender rods refer to workpieces with a length-to-end diameter ratio of 1.5 to 1000.

[0062] By inserting the workpiece to be ground vertically into the hole of the guide base, the part's own gravity further promotes the grinding of the bottom section without applying additional axial force.

[0063] The guide base 14 can also grind multiple pieces to be ground at the same time. The guide base 14 fixes the multiple pieces to be ground into a whole, ensuring the stability of the workpieces during rotational grinding, so that the end surface flatness reaches less than 1um.

[0064] In some embodiments, the guide base 14 is made of bakelite material, which is light in weight and has a large surface area. Compared with the grinding effect produced by the grinding disc, the workpiece is very fine, so the impact on the grinding effect and size measurement of the workpiece can be ignored.

[0065] During grinding, the turntable 12 rotates around its own axis S, and the guide base 14 is driven manually or by a motor to move relative to the turntable 12, such as revolving around the axis S, to ensure uniformity of end surface grinding. The guide base 14 can also move randomly on the grinding disc surface 120 along other routes.

[0066] The end face grinding device is particularly suitable for workpieces with a large aspect ratio and heavy weight, such as Figure 3 and Figure 4 The injector 300 shown has the following advantages: multiple injectors and guide bases are fixed into a whole to ensure the overall stability when grinding the end face, and use the injector's own gravity to improve the end face grinding effect, and use the micrometer to monitor the dimensional change of the second end face in real time to achieve direct monitoring of the grinding amount of the first end face, thereby avoiding the problem of excessive grinding causing part size deviation or insufficient grinding.

[0067] In combination with the introduction of the end surface grinding device, an end surface grinding method using the end surface grinding device can also be understood, and the method includes the following steps:

[0068] Insert a plurality of wear parts such as fuel injectors into the through holes to form a whole with the guide base;

[0069] Make the first end face of the workpiece to be ground contact with the turntable, and make the dimension detection piece face the second end face of the workpiece to be ground. The dimension detection piece can be fine-tuned by the cantilever screw to ensure that the probe and the top of the second end face are always within the effective measurement range;

[0070] The turntable is rotated and the guide base is moved relative to the turntable. For example, the grinding platform is rotated, and the guide base controls the part to be ground to rotate and revolve relative to the grinding platform. The grinding amount of the first end face is determined by monitoring the change in the distance between the second end face and the probe through the size detection part.

[0071] The grinding process of the above method is uniform, has a better grinding effect, can detect the grinding removal amount in real time to reflect the grinding efficiency, and is easy to operate.

[0072] It should be noted that the above content uses words such as "first" and "second" to limit components, which is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0073] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0074] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0075] Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. End surface grinding device, used for grinding the workpiece to be ground, characterized in that: The workpiece to be ground comprises a first end surface and a second end surface respectively located at two ends of the workpiece to be ground. The device comprises: Platform, used to provide a horizontal surface; A turntable, disposed on the platform and capable of rotating, for providing a grinding disk surface; a monitoring assembly, comprising a support member and a size detection member connected to the support member, wherein the size detection member is used to monitor the second end surface; and A guide base is movably contacted with the grinding disc surface, and is provided with a plurality of through holes, a part of which is used to fix the support member, and another part of which is used to insert one or more of the workpieces to be ground, and the workpieces to be ground promote the grinding between the first end face and the grinding disc surface by their own gravity; The size detection component determines the grinding amount of the first end surface by monitoring the change in the distance between the size detection component and the second end surface.

2. The end surface grinding device according to claim 1, characterized in that: The workpiece to be worn is a part with a weight greater than 2KG.

3. The end surface grinding device according to claim 1, characterized in that: The workpiece to be ground is a slender rod.

4. The end surface grinding device according to claim 1, characterized in that: The support member comprises a pillar and a cantilever, wherein the pillar is fixed in the through hole, one end of the cantilever is connected to the pillar movably up and down, and the other end is connected to the size detection member.

5. The end surface grinding device according to claim 1, characterized in that: The size detection component is a micrometer or a laser sensor.

6. The end surface grinding device according to claim 1, characterized in that: The guide base and / or the support member are made of bakelite.

7. The end surface grinding device according to claim 1, characterized in that: The guide base is configured to be moved relative to the turntable by manual or automatic driving.

8. The end surface grinding device according to claim 1, characterized in that: The through hole and the workpiece to be ground maintain a radial clearance of 0.4 to 0.5 mm on one side.

9. The end surface grinding device according to claim 1, characterized in that: The platform is provided with a groove, and the turntable is rotatably arranged in the groove.

10. The end surface grinding device according to claim 1, characterized in that: The supporting member is a retractable member so as to adjust its own height.

11. An end surface grinding method, characterized in that: Using the end surface grinding device according to any one of claims 1 to 10, the method comprises the following steps: Inserting a plurality of parts to be ground into the through holes to form a whole with the guide base; The first end surface is brought into contact with the rotating disk, and the size detection member is directed toward the second end surface of the workpiece to be ground; The turntable is rotated, the guide base is moved relative to the turntable, and the plurality of workpieces to be ground are ground simultaneously. The grinding amount of the first end face is determined by monitoring the change in the distance between the second end face and the probe through the size detection part.

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