Fixture for grinding symmetrically distributed planes on outer circle of cylinder

Abstract

The utility model provides a clamp used for grinding symmetrically distributed planes on the outer circle of a cylinder, belongs to the technical field of grinding machining, and provides a clamping mechanism used for clamping parts to be machined, a clamping hole is formed in the length direction of the clamping mechanism, and an opening of the clamping hole is formed in the near end of the clamping mechanism; two symmetrical machining grooves are formed in the two sides of the clamping mechanism in the height direction, and symmetrically-distributed planes can be ground and machined on the to-be-machined part through the machining grooves in the two sides of the clamping mechanism in the height direction. By means of the clamp for grinding the symmetrically-distributed planes on the outer circle of the cylinder, one end in the height direction faces upwards, and the surface of one side of a to-be-machined part is ground; and after machining is completed, the rotating and clamping mechanism is turned over, the other end in the height direction faces upwards, the surface of the other side of the to-be-machined part is ground, and it is ensured that grinding of symmetrically-distributed planes on the outer circle of the cylinder meets the precision requirement.

Description

Technical Field

[0001] This utility model relates to the field of grinding technology, and in particular to a fixture for grinding symmetrically distributed planes on the outer circle of a cylinder. Background Technology

[0002] Surface grinding relies on grinding wheels. Surface grinding fixtures are devices used in machining to fix the workpiece and ensure its stability and accuracy during the grinding process. Existing technologies mainly involve the following aspects: 1. Manual fixtures: dependent on operator experience, accuracy and consistency are difficult to guarantee. 2. General-purpose fixtures: limited adaptability, difficult to meet the needs of complex workpieces.

[0003] Ordinary fixtures struggle to achieve micrometer-level precision in the symmetry of symmetrical planes distributed on the outer perimeter of a cylinder. This is where the challenge lies in achieving micrometer-level precision in the symmetry of these symmetrical planes on the outer perimeter of a cylinder. Utility Model Content

[0004] The main purpose of this invention is to provide a fixture for grinding symmetrically distributed planes on the outer circle of a cylinder, aiming to improve the accuracy of grinding symmetrical planes on the outer circle.

[0005] To achieve the above objectives, this utility model proposes a fixture for grinding symmetrically distributed planes on the outer circle of a cylinder, where the cylinder is the part to be processed. The fixture includes a clamping mechanism for clamping the part to be processed, with a proximal end and a distal end at the two ends along the length direction of the clamping mechanism. A clamping hole is provided along the length direction of the clamping mechanism, with the opening of the clamping hole located at the proximal end of the clamping mechanism. Two symmetrical machining grooves are provided on both sides along the height direction of the clamping mechanism.

[0006] The workpiece to be processed can be inserted into the clamping hole from the near end of the clamping mechanism, and the working plane of the workpiece is not lower than the bottom surface of the machining groove; the clamping mechanism is also equipped with a workpiece fixing component, which is used to fix the position of the workpiece to be processed; the machining grooves on both sides of the clamping mechanism in the height direction can grind symmetrically distributed planes on the workpiece to be processed.

[0007] In one embodiment, the clearance between the clamping hole and the workpiece to be processed is 0-4 μm.

[0008] In one embodiment, the clamp further includes a base and a positioning block mounted on the base; the base includes a first mounting surface and a second mounting surface for mounting the positioning block; the first mounting surface is parallel to the second mounting surface.

[0009] The positioning block includes two opposing sides, namely a first support surface and a second support surface. The first support surface is used to connect with the second mounting surface, and the second support surface is used to connect with the clamping mechanism. The first support surface and the second support surface are parallel.

[0010] In one embodiment, the base is provided with mounting holes, and the first mounting surface of the positioning block is provided with internal threaded holes; the base is also provided with bolts for fixing the positioning block, and the bolts pass through the mounting holes of the base and connect with the internal threaded holes of the positioning block.

[0011] In one embodiment, at least one mounting area is provided on the second mounting surface of the base, and each mounting area is provided with at least two positioning blocks. The second support surfaces of the positioning blocks in one mounting area form a support plane.

[0012] The two ends of the mounting mechanism in the height direction are a first positioning surface and a second positioning surface, respectively. The first positioning surface and the second positioning surface are respectively connected to the support plane of an installation area, which can grind symmetrically distributed planes on the workpiece to be processed.

[0013] In one embodiment, two processing slots are respectively provided on both sides of the mounting mechanism in the height direction, and a partition block is provided between the two processing slots; each installation area is provided with three positioning blocks, which are respectively used to contact the near end, far end and partition block of the mounting mechanism.

[0014] In one embodiment, the height error of the second support surface of the three positioning blocks is 0-3 μm, and the flatness is 1-3 μm.

[0015] In one embodiment, a crossbeam is provided on the base, one side of which is a backing surface, which is perpendicular to the second mounting surface; multiple mounting areas are provided on the base along the length of the crossbeam, and the backing surface can contact the sides of multiple clamping mechanism processing slots to maintain the consistency of the positions of the multiple clamping mechanism processing slots.

[0016] In one embodiment, the base is further provided with a back plate, and a positioning pin is provided on the back plate. The positioning pin is connected to the back plate by a thread. The positioning pin can push the side of the processing groove of the mounting mechanism to fit against the back surface of the crossbeam. The positioning pin and the back surface can repeatedly position the mounting mechanism with a positioning error of 0-5μm.

[0017] In one embodiment, a pin hole is provided on one side of the clamping mechanism in the width direction. The clamping mechanism also includes a fastening pin that can be inserted into the pin hole. The fastening pin can pass through the pin hole and contact the workpiece to be processed in the clamping hole to fix the relative position of the workpiece to be processed and the clamping mechanism.

[0018] The technical solution of this utility model uses a clamping mechanism to fix the part to be processed, exposing the surface to be ground outside the clamping mechanism. The two ends of the clamping mechanism in the height direction have been pre-processed into parallel reference surfaces. First, one end in the height direction is turned upward, and the surface of one side of the part to be processed is ground. After the processing is completed, the clamping mechanism is flipped so that the other end in the height direction is turned upward, and the surface of the other side of the part to be processed is ground, ensuring that the symmetrically distributed planes on the outer circle of the cylinder are ground to meet the accuracy requirements. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 An exploded view of an embodiment of a fixture for grinding symmetrically distributed planes on the outer circle of a cylinder, provided by this utility model;

[0021] Figure 2 A schematic diagram of a fixture embodiment for grinding symmetrically distributed planes on the outer circle of a cylinder, provided by this utility model;

[0022] Figure 3 A schematic diagram of the base and positioning pin of a fixture embodiment for grinding symmetrically distributed planes on the outer circle of a cylinder, provided by this utility model;

[0023] Figure 4 A schematic diagram of the clamping mechanism and fastening pins of an embodiment of a clamp for grinding symmetrically distributed planes on the outer circle of a cylinder, provided by this utility model;

[0024] Figure 5 A schematic diagram of the bottom of the clamping mechanism of an embodiment of a clamp for grinding symmetrically distributed planes on the outer circle of a cylinder, provided by this utility model;

[0025] Figure 6 A schematic diagram of the base and positioning block of a fixture embodiment for grinding symmetrically distributed planes on the outer circle of a cylinder, provided by this utility model;

[0026] Explanation of icon numbers:

[0027] 10. Part to be processed; 11. Surface to be processed; 20. Mounting mechanism; 21. Clamping hole; 22. Machining groove; 23. Divider block; 24. Pin hole; 25. Fastening pin; 30. Base; 30. First mounting surface; 301. Second mounting surface; 302. Positioning block; 31. First support surface; 311. Second support surface; 312. Mounting hole; 32. Crossbeam; 33. Backing surface; 331. Back plate; 34. Positioning pin; 35.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0030] It should be noted that if any directional indication (such as up, down, left, right, front, back, etc.) is involved in the embodiments of this utility model, such directional indication is only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 connection of two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first," "second," etc., such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Surface grinding relies on grinding wheels. Surface grinding fixtures are devices used in machining to fix the workpiece and ensure its stability and accuracy during the grinding process. Existing technologies mainly involve the following aspects: 1. Manual fixtures: dependent on operator experience, accuracy and consistency are difficult to guarantee. 2. General-purpose fixtures: limited adaptability, difficult to meet the needs of complex workpieces.

[0033] Ordinary fixtures struggle to achieve micrometer-level precision in the symmetry of symmetrical planes distributed on the outer perimeter of a cylinder. This is where the challenge lies in achieving micrometer-level precision in the symmetry of these symmetrical planes on the outer perimeter of a cylinder.

[0034] This utility model proposes a cylindrical structure electro-corrosion machining fixture.

[0035] Please combine Figure 1 , Figure 2 In one embodiment of this utility model, a fixture for grinding symmetrically distributed planes on the outer circle of a cylinder, wherein the cylinder is a part 10 to be processed, the fixture includes a clamping mechanism 20 for clamping the part 10 to be processed, the two ends of the clamping mechanism 20 in the length direction are a proximal end and a distal end, respectively, a clamping hole 21 is provided in the length direction of the clamping mechanism 20, and the opening of the clamping hole 21 is located in the proximal end of the clamping mechanism 20; two symmetrical processing grooves 22 are provided on both sides in the height direction of the clamping mechanism 20.

[0036] The workpiece 10 to be processed can be inserted into the clamping hole 21 from the near end of the clamping mechanism 20. The working plane 11 of the workpiece 10 is not lower than the bottom surface of the processing groove 22. The clamping mechanism 20 is also provided with a workpiece fixing assembly, which is used to fix the position of the workpiece 10 to be processed. The symmetrically distributed planes can be ground on the workpiece 10 through the processing grooves 22 on both sides of the height direction of the clamping mechanism 20.

[0037] In this embodiment, the part to be processed 10 is a cylindrical part, and symmetrical planes need to be ground on the outer circular surface of the part to be processed 10. Symmetrical planes refer to two parallel planes being ground on the outer circular surface of the part to be processed 10.

[0038] The clamping mechanism 20 is used to clamp the part 10 to be processed, such as Figure 1 , Figure 2As shown, the clamping mechanism 20 is cubic in shape, with clamping holes 21 arranged along its centerline in the length direction. The size of the clamping holes 21 matches the size of the workpiece 10 to be processed. Machining grooves 22 are respectively arranged on both sides in the height direction of the clamping mechanism 20. The bottom surface of the machining grooves 22 is lower than the outer surface of the clamping mechanism 20 in the height direction. The bottom surface of the machining grooves 22 is the machining surface. The area to be processed on the outer circular surface of the workpiece 10 is within the machining grooves 22, and the flat surface of the workpiece 10 after grinding is not lower than the bottom surface of the machining grooves 22.

[0039] The length of the machining groove 22 can be set according to the position and size of the surface to be machined on the part 10 to be machined. The position of the machining groove 22 needs to match the position of the surface to be machined on the part 10 to be machined, and the size of the machining groove is not less than the size of the surface to be machined on the part 10 to be machined. The surface to be machined on the part 10 to be machined needs to be completely exposed in the machining groove 22.

[0040] The grinding machine tool can be a surface grinder, in which the grinding wheel of the surface grinder moves back and forth in the machining groove 22 to process the area to be processed on the workpiece 10.

[0041] In the specific implementation process, the two planes on both sides of the mounting mechanism 20 in the height direction have been pre-machined into parallel surfaces with parallelism meeting the accuracy requirements. In use, the cylinder of the part to be processed 10 is inserted into the clamping hole 21 of the mounting mechanism 20, and then the relative position of the part to be processed 10 and the mounting mechanism 20 is fixed by the part fixing assembly to prevent the part to be processed 10 from shifting or rotating during grinding.

[0042] After clamping, first connect one end of the clamping mechanism 20 in the height direction to the grinding machine tool. This can be done by placing it directly on the worktable of the grinding machine tool and securing it magnetically. Alternatively, it can be mounted on the worktable of the grinding machine tool using other fixtures. Start the grinding machine tool and process the surface of the part 10 to be processed within the processing slot 22.

[0043] After machining, keep the part fixing assembly in place of the part 10 to be machined, flip the clamping mechanism 20 so that the other end of the clamping mechanism 20 in the height direction is connected to the grinding machine tool, and grind the other end of the surface 11 to be machined. After machining, remove the machined part from the clamping mechanism 20.

[0044] Furthermore, the clearance between the clamping hole 21 and the workpiece 10 to be processed is 0-4 μm.

[0045] The clamping mechanism 20 is used to center position the part 10 to be processed. The clamping hole 21 of the clamping mechanism 20 is machined to fit with the outer circle of the part 10 to be processed, and the fit clearance can reach 0-4μm.

[0046] Furthermore, the fixture also includes a base 30 and a positioning block 31 mounted on the base 30; the base 30 includes a first mounting surface 301 and a second mounting surface 302 for mounting the positioning block 31; the first mounting surface 301 and the second mounting surface 302 are parallel.

[0047] The positioning block 31 includes two opposing sides, namely a first support surface 311 and a second support surface 312. The first support surface 311 is used to connect with the second mounting surface 302, and the second support surface 312 is used to connect with the mounting mechanism 20. The first support surface 311 and the second support surface 312 are parallel.

[0048] In this embodiment, as Figure 2 , Figure 3 As shown, the base 30 is a tooling for placing the clamping mechanism 20. The base 30 includes a first mounting surface 301 and a second mounting surface 302 for mounting the positioning block 31. The first mounting surface 301 is used to place the positioning block 31 on the working surface of the grinding machine tool, and the second mounting surface 302 is used to place the positioning block 31. The first mounting surface 301 and the second mounting surface 302 have been pre-machined to be parallel surfaces with parallelism meeting the accuracy requirements. The positioning block 31 includes a first support surface 311 and a second support surface 312, which have also been pre-machined to be parallel surfaces with parallelism meeting the accuracy requirements.

[0049] In the specific implementation process, before the grinding process begins, the positioning blocks 31 are installed on the base 30 to fix their positions. Then, the base 30 is placed on the working surface of the grinding machine, and the second support surfaces 312 of all the positioning blocks 31 are ground to ensure that the flatness of the plane formed by the second support surfaces 312 of the positioning blocks 31 is less than 5μm, and the height difference between the second support surfaces 312 of multiple positioning blocks 31 is less than 3μm. Then, the clamping mechanism 20 is installed on the base 30 via the positioning blocks 31 to process the part 10 to be processed.

[0050] In some embodiments, the symmetry between the two planes of the clamping mechanism 20 and the positioning block 31 relative to the central hole reaches 3-10 μm. The clamping mechanism 20 and the positioning block 31 can make the parallelism between the axis of the workpiece 10 to be processed and the XY plane of the grinding machine tool reach 1-3 μm.

[0051] Furthermore, the base 30 is provided with mounting holes 32, and the first mounting surface 301 of the positioning block 31 is provided with internal threaded holes; the base 30 is also provided with bolts for fixing the positioning block 31, and the bolts pass through the mounting holes 32 of the base 30 and connect with the internal threaded holes of the positioning block 31.

[0052] In this embodiment, as Figure 6As shown, the positioning block 31 and the base 30 are installed and fixed by bolt fasteners. Specifically, the base 30 is provided with multiple mounting holes 32, and the first mounting surface 301 of the positioning block 31 is provided with an internal threaded hole; the mounting hole 32 can be a countersunk hole, and the bolt passes through the mounting hole 32 and is connected to the positioning block 31 through the internal threaded hole.

[0053] Each positioning block 31 is connected to the base 30 by at least two bolts to prevent the positioning block 31 from rotating.

[0054] Furthermore, at least one mounting area is provided on the second mounting surface 302 of the base 30, and each mounting area is provided with at least two positioning blocks 31. The second support surface 312 of the positioning block 31 in one mounting area forms a support plane.

[0055] The two ends of the mounting mechanism 20 in the height direction are a first positioning surface and a second positioning surface, respectively. The first positioning surface and the second positioning surface are respectively connected to the support plane of an installation area, which can grind symmetrically distributed planes on the workpiece 10 to be processed.

[0056] In this embodiment, a single installation area can accommodate multiple positioning blocks 31, and a single installation area can hold a clamping mechanism 20.

[0057] In some embodiments, an installation area includes two positioning blocks 31, which are respectively positioned near the proximal end and the distal end of the mounting mechanism 20, and the two positioning blocks 31 support the mounting mechanism 20 from both ends in the length direction of the mounting mechanism 20.

[0058] Furthermore, the mounting mechanism 20 has two processing grooves 22 on each side in the height direction, and a partition block 23 is provided between the two processing grooves 22; each installation area is provided with three positioning blocks 31, which are respectively used to contact the near end, far end and partition block 23 of the mounting mechanism 20.

[0059] In this implementation, such as Figure 2 , Figure 4 , Figure 5 As shown, the clamping mechanism 20 has two processing slots 22 on each side of its height direction, for a total of four processing slots 22. Correspondingly, the workpiece 10 to be processed has four surface planes 11 to be processed. These four surface planes 11 are distributed on two sides of the cylinder, with two surface planes 11 on each side. The surface planes 11 on the two sides are parallel to each other. There is a gap between the two surface planes 11 on the same side, and a separator block 23 is placed at the gap.

[0060] Correspondingly, each installation area is provided with three positioning blocks 31, which are respectively located at the near end, far end and corresponding partition block 23 of the mounting mechanism 20.

[0061] In some embodiments, the height error of the second support surface 312 of the three positioning blocks 31 is 0-3μm, and the flatness is 1-3μm.

[0062] Furthermore, a crossbeam 33 is provided on the base 30, and one side of the crossbeam 33 is a backing surface 331, which is perpendicular to the second mounting surface 302. Multiple mounting areas are provided on the base 30 along the length of the crossbeam 33, and the backing surface 331 can contact the sides of the processing slots 22 of the multiple mounting mechanisms 20 to maintain the consistency of the positions of the multiple processing slots 22 of the mounting mechanisms 20.

[0063] In this embodiment, as Figure 3 As shown, the crossbeam 33 is a protruding cube set on the second mounting surface 302. The back surface 331 of the crossbeam 33 is ground by the side of the grinding wheel of the grinding machine tool, which mounts the base 30 on the grinding machine tool. This ensures the perpendicularity of the back surface 331 to the grinding surface of the grinding machine tool, and the parallelism between the back surface 331 and the X-axis of the grinding machine tool is less than 3μm. The X-axis of the grinding machine tool is parallel to the direction of the reciprocating movement of the grinding wheel during the operation of the grinding machine tool.

[0064] The backing surface 331 is used to ensure that the multiple clamping mechanisms 20 placed on the base 30 are in the same position on the Y-axis of the machine tool, so as to grind multiple parts 10 to be processed at the same time.

[0065] In this embodiment, the backing surface 331 is located near the far end of the mounting mechanism 20, and the height of the positioning block 31 is less than the height of the crossbeam 33, so that the side of a positioning groove can fit against the backing surface 331.

[0066] Furthermore, the base 30 is also provided with a back plate 34, and the back plate 34 is provided with a positioning pin 35. The positioning pin 35 is connected to the back plate 34 by a thread. The positioning pin 35 can push the side of the processing groove 22 of the mounting mechanism 20 to fit against the back surface 331 of the crossbeam 33. The positioning pin 35 and the back surface 331 can repeatedly position the mounting mechanism 20 with a positioning error of 0-5μm.

[0067] In some embodiments, the grinding machine tool has a magnetic attraction function, which can attract metal tooling or metal parts with magnetic attraction properties to the worktable of the grinding machine tool. In this embodiment, one or more of the base 30, positioning block 31, and clamping mechanism 20 can be made of a metal material with magnetic attraction properties. The positioning pin 35 is used to push the side of the machining groove 22 of the clamping mechanism 20 to conform to the backing surface 331 of the crossbeam 33. The positioning pin 35 is provided with external threads, and the back plate 34 is provided with internal threaded holes that match the external threads. The positioning pin 35 can be a flat-head screw. Rotating the positioning pin 35 can fasten the clamping mechanism 20, so that the clamping mechanism 20 is installed in a fixed position on the Y-axis of the machine tool.

[0068] Each installation area is equipped with a locating pin 35, which enables multiple mounting mechanisms 20 to be positioned identically on the Y-axis of the machine tool.

[0069] Furthermore, a pin hole 24 is provided on one side of the clamping mechanism 20 in the width direction. The clamping mechanism 20 also includes a fastening pin 25 that can be inserted into the pin hole 24. The fastening pin 25 can pass through the pin hole 24 and contact the workpiece 10 to be processed in the clamping hole 21 to fix the relative position of the workpiece 10 to be processed and the clamping mechanism 20.

[0070] In this embodiment, as Figure 4 , Figure 5 As shown, the pin hole 24 and the fastening pin 25 are used to fix the workpiece 10 to be processed to the clamping mechanism 20. In some embodiments, the fastening pin 25 may be a threaded flat pin, and the pin hole 24 is provided with a matching internal thread. Rotating the fastening pin 25 can fix the workpiece 10 to be processed to the clamping mechanism 20.

[0071] In some embodiments, the mounting mechanism 20 is provided with a plurality of fastening pins 25 and pin holes 24. In this embodiment, the mounting mechanism 20 is provided with two fastening pins 25 and two pin holes 24. The two pin holes 24 are respectively located near the proximal end of the mounting mechanism 20 and near the distal end of the mounting mechanism 20.

[0072] In some embodiments, a plurality of fastening pins 25 on the clamping mechanism 20 are disposed on the same side of the clamping hole 21. The fastening pins 25 can push the workpiece 10 to be processed to the other side of the clamping hole 21 to fix the workpiece 10 to be processed without affecting the surface grinding process.

[0073] It should be understood that the terms "one embodiment" or "one example" throughout the specification mean that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in one example" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also recognize that the embodiments described in the specification are optional embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0074] In various embodiments of this utility model, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of this utility model embodiment.

[0075] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, or they may sometimes be executed in reverse order, depending on the functions involved. It is particularly important to note that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0076] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A fixture for grinding planes symmetrically distributed on the outside of a cylinder, which is a part (10) to be machined, characterized in that: The fixture comprises a clamping mechanism (20) for clamping a part to be machined (10), the two ends of the clamping mechanism (20) in the length direction are proximal end and distal end respectively, the length direction of the clamping mechanism (20) is provided with a clamping hole (21), and the opening of the clamping hole (21) is arranged at the proximal end of the clamping mechanism (20); the two sides of the clamping mechanism (20) in the height direction are provided with two symmetrical machining grooves (22), The part to be machined (10) can be inserted into the clamping hole (21) from the proximal end of the clamping mechanism (20), and the machined surface (11) of the part to be machined (10) is not lower than the bottom surface of the machining groove (22); the clamping mechanism (20) is further provided with a part fixing assembly, which is used for fixing the position of the part to be machined (10); the machining grooves (22) on both sides of the clamping mechanism (20) in the height direction can grind symmetrical planes on the part to be machined (10).

2. A fixture for grinding planes symmetrically distributed on the outside of a cylinder according to claim 1, characterized in that: The cooperation gap between the clamping hole (21) and the part to be machined (10) is 0-4μm.

3. A fixture for grinding planes symmetrically distributed on the outside of a cylinder according to claim 1, characterized in that: The fixture further comprises a base (30) and a positioning block (31) mounted on the base (30); the base (30) comprises a first mounting surface (301) and a second mounting surface (302) for mounting the positioning block (31); the first mounting surface (301) is parallel to the second mounting surface (302); The positioning block (31) comprises two opposite side surfaces, which are a first support surface (311) and a second support surface (312) respectively, the first support surface (311) is used for connecting with the second mounting surface (302), and the second support surface (312) is used for connecting with the clamping mechanism (20); the first support surface (311) is parallel to the second support surface (312).

4. A fixture for grinding planes symmetrically distributed on the outside of a cylinder according to claim 3, characterized in that: The base (30) is provided with a mounting hole (32), and the first mounting surface (301) of the positioning block (31) is provided with an internal threaded hole; the base (30) is further provided with a bolt for fixing the positioning block (31), and the bolt is connected with the internal threaded hole of the positioning block (31) through the mounting hole (32) of the base (30).

5. A fixture for grinding planes symmetrically distributed on the outside of a cylinder according to claim 3, characterized in that: The second mounting surface (302) of the base (30) is provided with at least one mounting area, and each mounting area is provided with at least two positioning blocks (31), and the second support surface (312) of the positioning block (31) in one mounting area constitutes a support plane; The two ends of the clamping mechanism (20) in the height direction are a first positioning surface and a second positioning surface respectively, and the first positioning surface and the second positioning surface are connected with the support plane of one mounting area respectively to grind symmetrical planes on the part to be machined (10).

6. A fixture for grinding planes symmetrically distributed on the outside of a cylinder according to claim 5, characterized in that: The two sides of the clamping mechanism (20) in the height direction are respectively provided with two machining grooves (22), and a partition block (23) is arranged between the two machining grooves (22); each mounting area is provided with three positioning blocks (31), and the three positioning blocks (31) are respectively used for contacting with the proximal end, the distal end and the partition block (23) of the clamping mechanism (20).

7. A fixture for grinding planes symmetrically distributed on the outside of a cylinder according to claim 6, characterized in that: The height error of the second support surface (312) of the three positioning blocks (31) is 0-3μm, and the flatness is 1-3μm.

8. A fixture for grinding planes symmetrically distributed on a cylindrical outer circle according to any one of claims 5-7, characterized in that: The base (30) is provided with a crossbeam (33), one side of the crossbeam (33) is a backstop surface (331), the backstop surface (331) is perpendicular to the second mounting surface (302); the base (30) is provided with a plurality of mounting areas along the length direction of the crossbeam (33), the backstop surface (331) can be in contact with the side of the machining groove (22) of the plurality of clamping mechanisms (20), and the backstop surface (331) is used for keeping the consistency of the positions of the machining grooves (22) of the plurality of clamping mechanisms (20).

9. A fixture for grinding planes symmetrically distributed on the outside of a cylinder according to claim 8, characterized in that: The base (30) is further provided with a back plate (34), the back plate (34) is provided with a positioning pin (35), the positioning pin (35) is connected with the back plate (34) through screw threads, the positioning pin (35) can push the side of the machining groove (22) of the clamping mechanism (20) to be attached to the backstop surface (331) of the crossbeam (33); the positioning pin (35) and the backstop surface (331) can repeatedly position the clamping mechanism (20), and the positioning error is 0-5 μm.

10. A fixture for grinding planes symmetrically distributed on the outside of a cylinder according to claim 1, characterized in that: One side of the clamping mechanism (20) in the width direction is provided with a pin hole (24), the part is fixed gradually is a fastening pin (25) capable of being inserted into the pin hole (24), the fastening pin (25) can be in contact with the part to be machined (10) in the clamping hole (21) through the pin hole (24), and is used for fixing the relative position of the part to be machined (10) and the clamping mechanism (20).

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