Servo rotary honing jig

Abstract

The utility model relates to a servo rotating honing jig, which belongs to the technical field of numerical control honing machines and comprises a rotating mechanism, a pneumatic floating platform mechanism, a first pre-pressing air cylinder mechanism and a second air cylinder pressing mechanism. The rotating mechanism comprises a coupler, a rotating positioning shaft, an adjusting space ring, a bearing seat positioning plate, a bearing, a large space ring, a small space ring, a framework oil seal, a limiting pin, a positioning bottom plate, a coarse positioning mandrel, a workpiece positioning block, a bearing cover plate, a bearing seat, a second framework oil seal, a locking nut, a motor seat and a servo motor. According to the servo rotary honing jig, the pneumatic floating platform is additionally arranged below the rotary jig, so that an air film is formed between the pneumatic floating platform and the bottom surface of the jig, the suspended jig can slide forwards, backwards, leftwards and rightwards on the air film, and a positioning needle can conveniently align the center of a honing hole of a workpiece; adjustment of gaps of front, back, left and right movement of the jig can be achieved through jackscrews installed on the four sides of the pneumatic floating platform, rapid resetting of the jig is achieved, and universality is good.

Description

Technical Field

[0001] This utility model relates to the field of CNC honing machine technology, specifically a servo rotary honing fixture. Background Technology

[0002] A honing machine is a type of grinding machine used for precision machining of workpiece surfaces. Its main principle is to use the honing stone around the circumference of the honing head. Through an expansion mechanism, the honing stone is expanded radially, causing it to press against the wall of the workpiece hole and make contact. At the same time, the honing head rotates and reciprocates while the workpiece remains stationary; or the honing head only rotates while the workpiece reciprocates, thus achieving honing.

[0003] With the continuous upgrading of the manufacturing industry, the servo rotary honing fixtures on the market have put forward higher requirements for the precision of the honing workpieces. Some high-requirement honing workpieces have multiple holes that need to be honed on the axial circumference. Usually, only one hole can be honed at a time when the workpiece is positioned and clamped. A multi-hole honing workpiece often needs to be clamped multiple times to complete the processing. Sometimes, there will be omissions in the processing, which is time-consuming and labor-intensive. Moreover, multiple positioning and clamping will affect the processing accuracy of the workpiece dimensions. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a servo rotary honing fixture, which has advantages such as enhanced practicality and solves the problems that need to be improved in honing fixtures.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a servo rotary honing fixture, comprising a rotary mechanism, a pneumatic floating platform mechanism, a first pre-clamping cylinder mechanism, and a second cylinder clamping mechanism. The rotary mechanism includes a coupling, a rotary positioning shaft, an adjusting spacer, a bearing seat positioning plate, a bearing, a large spacer, a small spacer, a skeleton oil seal, a limit pin, a positioning base plate, a coarse positioning mandrel, a workpiece positioning block, a bearing cover plate, a bearing seat, a second skeleton oil seal, a lock nut, a motor base, and a servo motor. The servo motor is fixed to the positioning base plate via the motor base. The front output shaft of the servo motor is connected to the coupling. The bearing seat is fixed to the positioning base plate. The bearing seat contains, in sequence, a rotary positioning shaft, a skeleton oil seal, a bearing cover plate, a bearing, a large spacer, a small spacer, an adjusting spacer, a second skeleton oil seal, a bearing seat positioning plate, and a lock nut. The small end of the rotary positioning shaft is connected to the coupling. The coarse positioning mandrel and the workpiece positioning block are fixed on the rotary positioning shaft. A limit pin is mounted on the workpiece positioning block.

[0006] Among them, the limit pin and the coarse positioning mandrel are used for coarse positioning of the workpiece.

[0007] The pneumatic floating platform mechanism includes a floating platform base, a floating platform cover plate, a first set screw fixing block, a first ball-head set screw, a second set screw fixing block, a second ball-head set screw, and a worktable. The floating platform base is fixed on the worktable. The floating platform cover plate has multiple small holes. The first set screw fixing block and the first ball-head set screw are installed on the left and right sides of the floating platform base. The second set screw fixing block and the second ball-head set screw are installed on the floating platform base for adjusting the clearance of the fixture's forward, backward, left, and right movements.

[0008] The air-float base has an annular groove, and the air-float cover plate is installed in the annular groove.

[0009] It should be noted that multiple small holes are evenly distributed inside the air-floating platform base, and these holes are connected to the annular groove to form an air chamber.

[0010] Understandably, an air speed control valve is installed on the side of the air flotation platform base, which communicates with the annular groove on the air flotation platform base and is used to adjust the air intake volume.

[0011] The first pre-compression cylinder mechanism includes a locking nut, a pre-compression block, a thrust bearing, a bearing sleeve, a pre-compression cylinder seat A, a pre-compression cylinder seat B, a first pre-compression cylinder plate, and a first pre-compression cylinder. The first pre-compression cylinder plate is fixed on the positioning base plate. The first pre-compression cylinder is connected to the first pre-compression cylinder plate through the pre-compression cylinder seat A, the pre-compression cylinder seat B, and the first pre-compression cylinder plate. The cylinder shaft of the first pre-compression cylinder extends out and is connected to the pre-compression block, the thrust bearing, and the bearing sleeve, and is fixed with a locking nut.

[0012] The second cylinder clamping mechanism includes a honing workpiece, a workpiece clamping block, a spring top, a second clamping cylinder seat, and a second clamping cylinder. There are four spring tops, which are evenly distributed in front of the workpiece clamping block. One end of the side of the workpiece clamping block is fixed to the clamping cylinder.

[0013] The other end of the side has a round hole that fits onto the extension shaft of the first pre-pressing cylinder. This round hole has a gap so that when the workpiece pressing block drives the spring top to move forward with the second pressing cylinder, it can pass through the pre-pressing block at the head of the first pre-pressing cylinder and press down the honing workpiece.

[0014] It should be noted that the clamping mechanism is installed behind the pre-clamping mechanism.

[0015] Furthermore, a sensor sensing block is mounted on the outer end face of the rotary positioning shaft, and a sensor bracket is provided on the positioning base plate, with a sensor mounted on the sensor bracket.

[0016] Furthermore, the upper end of the rotating mechanism is provided with a positioning pin structure, which includes a positioning pin, a positioning sleeve, and a positioning mounting plate. The positioning pin is fixed to the positioning mounting plate by the positioning sleeve.

[0017] Furthermore, a fixture clamping mechanism is provided on the outside of the rotating mechanism. The fixture clamping mechanism includes a cylinder cross arm, a rotary clamping cylinder, a cylinder dust cover, and a clamping rod. The rotary clamping cylinder is fixed on the positioning base plate.

[0018] When the positioning target precisely positions the workpiece, the two rotary clamping cylinders drive the clamping rod on the cylinder arm to rotate 90 degrees, clamping the fixture.

[0019] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0020] 1. This servo rotary honing fixture features a rotating mechanism that allows the workpiece to rotate sequentially in the axial and circumferential directions after being clamped and positioned once, thus completing the processing of multiple honing holes. The automatic rotary positioning mechanism is controlled by a servo motor, ensuring stable rotation and high reliability. Through sensor settings on the rotating mechanism, it can quickly return to the origin, thereby realizing automatic honing of multiple holes in the workpiece and greatly improving production efficiency.

[0021] 2. This servo rotary honing fixture features a pneumatic floating platform added below it, creating an air film between the platform and the fixture's bottom surface. The suspended fixture can slide forward, backward, left, and right on this air film, facilitating the positioning pin's alignment of the workpiece's honing hole center. The air film between the pneumatic floating platform and the fixture enables smooth movement of the fixture, ensuring accurate hole alignment and guaranteeing the workpiece's honing quality. Adjustable clearances for the fixture's forward, backward, left, and right movements can be achieved using set screws installed on the four sides of the pneumatic floating platform, allowing for rapid fixture reset and demonstrating good versatility.

[0022] 3. This servo rotary honing fixture has the ability to automatically clamp the fixture and the workpiece by adding a clamping mechanism, which can effectively avoid the phenomenon of missed processing due to multiple processing holes. It is easy to maintain and repair, has a simple and compact structure, and reduces installation space. Attached Figure Description

[0023] Figure 1 This is a top view of the structure of this utility model;

[0024] Figure 2 This is a front view of the structure of this utility model;

[0025] Figure 3 This is a side view of the structure of this utility model.

[0026] In the diagram: 1. Coupling; 2. Rotary positioning shaft; 3. Adjusting spacer; 4. Bearing seat positioning plate; 5. Bearing; 6. Large spacer; 7. Small spacer; 8. Frame oil seal; 9. Limit pin; 10. Positioning pin; 11. Positioning pin sleeve; 12. Positioning mounting plate; 13. Pre-clamping block; 14. Thrust bearing; 15. Bearing sleeve; 16. Second clamping cylinder seat; 17. First pre-clamping cylinder; 18. Pre-clamping cylinder seat A; 19. First pre-clamping cylinder plate; 20. Air float base; 21. Pre-clamping cylinder seat B; 22. Positioning base plate; 23. Air float cover plate; 24. Locking nut one; 25. Honed workpiece; 6. Coarse positioning mandrel; 27. Workpiece positioning block; 28. Bearing cover plate; 29. ​​Bearing seat; 30. Second skeleton oil seal; 31. Locking nut II; 32. First set screw fixing block; 33. First ball head set screw; 34. Motor seat; 35. Servo motor; 36. Workpiece clamping block; 37. Second clamping cylinder; 38. Spring top head; 39. Second ball head set screw; 40. Second set screw fixing block; 41. Lifting cylinder; 42. Sensor sensing block; 43. Cylinder cross arm; 44. Cylinder dust cover; 45. Rotary clamping cylinder; 46. Clamping rod; 47. Sensor bracket; 48. Sensor; 49. Worktable. Detailed Implementation

[0027] 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 protection scope of the present utility model.

[0028] Please see Figures 1 to 3This embodiment of a servo rotary honing fixture includes a rotating mechanism, a pneumatic floating platform mechanism, a first pre-clamping cylinder mechanism, and a second cylinder clamping mechanism. The rotating mechanism includes a coupling 1, a rotary positioning shaft 2, an adjusting spacer 3, a bearing seat positioning plate 4, a bearing 5, a large spacer 6, a small spacer 7, a skeleton oil seal 8, a limit pin 9, a positioning base plate 22, a coarse positioning mandrel 26, a workpiece positioning block 27, a bearing cover plate 28, a bearing seat 29, a second skeleton oil seal 30, a second locking nut 31, a motor base 34, and a servo motor 35. The servo motor 35 is electrically connected to... The base 34 is fixed on the positioning base plate 22. The front output shaft of the servo motor 35 is connected to the coupling 1. The bearing seat 29 is fixed on the positioning base plate 22. The bearing seat 29 is provided with a rotary positioning shaft 2, a skeleton oil seal 8, a bearing cover plate 28, a bearing 5, a large spacer 6, a small spacer 7, an adjusting spacer 3, a second skeleton oil seal 30, a bearing seat positioning plate 4, and a second locking nut 31 in sequence. The small end of the rotary positioning shaft 2 is connected to the coupling 1. The coarse positioning mandrel 26 and the workpiece positioning block 27 are fixed on the rotary positioning shaft 2. The workpiece positioning block 27 is equipped with a limit pin 9.

[0029] Among them, the limiting pin 9 and the coarse positioning mandrel 26 are used for coarse positioning of the workpiece.

[0030] The pneumatic floating platform mechanism includes a floating platform base 20, a floating platform cover plate 23, a first set screw fixing block 32, a first ball head set screw 33, a second set screw fixing block 40, a second ball head set screw 39, and a worktable 49. The floating platform base 20 is fixed on the worktable 49. The floating platform cover plate 23 has multiple small holes. The first set screw fixing block 32 and the first ball head set screw 33 are installed on the left and right sides of the floating platform base 20. The second set screw fixing block 40 and the second ball head set screw 39 are installed on the floating platform base 20 for adjusting the clearance of the jig's forward, backward, left and right movement.

[0031] The air-floating platform base 20 has an annular groove, and the annular groove is fitted with an air-floating platform cover plate 23.

[0032] It should be noted that multiple small holes are evenly distributed within the air-floating platform base 20, and these holes communicate with the annular groove to form an air chamber.

[0033] Understandably, an air speed control valve is installed on the side of the air flotation platform base 20, which communicates with the annular groove on the air flotation platform base 20, and is used for air intake adjustment.

[0034] The first pre-compression cylinder mechanism includes a locking nut 24, a pre-compression block 13, a thrust bearing 14, a bearing sleeve 15, a pre-compression cylinder seat A18, a pre-compression cylinder seat B21, a first pre-compression cylinder plate 19, and a first pre-compression cylinder 17. The pre-compression cylinder plate 19 is fixed on the positioning base plate 22. The first pre-compression cylinder 17 is connected to the pre-compression cylinder seat A18, the pre-compression cylinder seat B21, and the first pre-compression cylinder plate 19. The cylinder shaft of the first pre-compression cylinder 17 extends out and is connected to the pre-compression block 13, the thrust bearing 14, and the bearing sleeve 15, and is fixed with the locking nut 24.

[0035] The second cylinder clamping mechanism includes a honing workpiece 25, a workpiece clamping block 36, a spring top 38, a second clamping cylinder seat 16, and a second clamping cylinder 37. There are four spring tops 38, which are evenly distributed in front of the workpiece clamping block 36. One end of the side of the workpiece clamping block 36 is fixed to the clamping cylinder 37.

[0036] One of the sides has a round hole that fits onto the extension shaft of the first pre-pressing cylinder 17. This round hole has a gap so that when the workpiece pressing block 36 drives the spring top 38 to move forward with the second pressing cylinder 37, it can pass through the pre-pressing block 13 at the head of the first pre-pressing cylinder 17 and press down the honing workpiece 25.

[0037] It should be noted that the clamping mechanism is installed behind the pre-clamping mechanism.

[0038] In this embodiment, a sensor sensing block 42 is mounted on the outer end face of the rotary positioning shaft 2, a sensor bracket 47 is provided on the positioning base plate 22, and a sensor 48 is mounted on the sensor bracket 47.

[0039] In this embodiment, the upper end of the rotating mechanism is provided with a positioning pin structure, which includes a positioning pin 10, a positioning sleeve 11, and a positioning mounting plate 12. The positioning pin 10 is fixed on the positioning mounting plate 12 by the positioning sleeve 11.

[0040] In this embodiment, a fixture clamping mechanism is provided on the outside of the rotating mechanism. The fixture clamping mechanism includes a cylinder cross arm 43, a rotary clamping cylinder 45, a cylinder dust cover 44, and a clamping rod 46. The rotary clamping cylinder 45 is fixed on the positioning base plate 22.

[0041] When the positioning pin 10 precisely positions the workpiece 25, the two rotary clamping cylinders 45 drive the clamping rod 46 on the cylinder cross arm 43 to rotate 90 degrees and clamp the fixture.

[0042] The working principle of the above embodiments is as follows:

[0043] First, the workpiece 25 is loaded onto the limiting pin 9 and the coarse positioning mandrel 26 on the workpiece positioning block 27 of the fixture. The first pre-clamping cylinder 17 drives the pre-clamping block 13 at the front end of the cylinder to pre-clamp the workpiece 25.

[0044] Next, the worktable 49 is moved to the center of the positioning pin, and air is introduced into the air float base 20 to form an air film between the air float cover plate 23 and the fixture positioning base plate 22, which can slide back and forth and left and right. The positioning pin 10 is inserted into the first honing hole on the workpiece 25 to precisely position the first honing hole on the workpiece 25. In order to maintain the positioning accuracy of the workpiece 25, two rotary clamping cylinders 45 drive the clamping rod 46 on the cylinder cross arm 43 to rotate 90 degrees and clamp the fixture. Then, the second clamping cylinder 37 drives the four spring heads 38 evenly distributed on the workpiece clamping block 36 to press the workpiece 25.

[0045] Finally, the positioning pin 10 returns, the worktable 49 moves to the honing position, and the first honing hole is machined. After the first honing hole is machined, the worktable 49 returns to the center of the positioning pin. The second clamping cylinder 37 drives the four spring heads 38 evenly distributed on the workpiece clamping block 36 to return. Then, the two rotary clamping cylinders 45 drive the clamping rod 46 on the cylinder cross arm 43 to return, releasing the fixture. The rotating mechanism drives the workpiece 25 to rotate to the required angle. By repeating the above process, the second honing hole can be machined. The other honing holes are machined in sequence. The servo motor 35 returns, the sensor 48 installed on the positioning plate 22 receives the signal, the servo motor 35 resets, the worktable returns to the loading position, the first pre-clamping cylinder 17 drives the pre-clamping block 13 at the front end of the cylinder to return, the workpiece is removed, and one cycle is completed.

[0046] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A servo rotary honing fixture, comprising a rotating mechanism, a pneumatic floating platform mechanism, a first pre-clamping cylinder mechanism, and a second cylinder clamping mechanism, characterized in that: The rotating mechanism includes a coupling (1), a rotating positioning shaft (2), an adjusting spacer (3), a bearing seat positioning plate (4), a bearing (5), a large spacer (6), a small spacer (7), a skeleton oil seal (8), a limit pin (9), a positioning base plate (22), a coarse positioning mandrel (26), a workpiece positioning block (27), a bearing cover plate (28), a bearing seat (29), a second skeleton oil seal (30), a second locking nut (31), a motor base (34), and a servo motor (35). The servo motor (35) is fixed to the positioning base plate (22) via the motor base (34). The front end of the servo motor (35) outputs a shaft. The bearing seat (29) is fixed on the positioning base plate (22) and connected to the coupling (1). The bearing seat (29) is provided with a rotary positioning shaft (2), a skeleton oil seal (8), a bearing cover plate (28), a bearing (5), a large spacer (6), a small spacer (7), an adjusting spacer (3), a second skeleton oil seal (30), a bearing seat positioning plate (4), and a second locking nut (31) in sequence. The small end of the rotary positioning shaft (2) is connected to the coupling (1). The coarse positioning mandrel (26) and the workpiece positioning block (27) are fixed on the rotary positioning shaft (2). The workpiece positioning block (27) is equipped with a limit pin (9). The pneumatic floating platform mechanism includes a floating platform base (20), a floating platform cover plate (23), a first set screw fixing block (32), a first ball head set screw (33), a second set screw fixing block (40), a second ball head set screw (39), and a worktable (49). The floating platform base (20) is fixed on the worktable (49). The floating platform cover plate (23) has multiple small holes. The first set screw fixing block (32) and the first ball head set screw (33) are installed on the left and right sides of the floating platform base (20). The second set screw fixing block (40) and the second ball head set screw (39) are installed on the floating platform base (20) for adjusting the clearance of the fixture's forward, backward, left, and right movements. The first pre-pressurization cylinder mechanism includes a locking nut (24), a pre-pressurization block (13), a thrust bearing (14), a bearing sleeve (15), a pre-pressurization cylinder seat A (18), a pre-pressurization cylinder seat B (21), a first pre-pressurization cylinder plate (19), and a first pre-pressurization cylinder (17). The first pre-pressurization cylinder plate (19) is fixed on the positioning base plate (22). The first pre-pressurization cylinder (17) is connected to the pre-pressurization cylinder seat A (18), the pre-pressurization cylinder seat B (21), and the first pre-pressurization cylinder plate (19). The cylinder shaft of the first pre-pressurization cylinder (17) extends out and is connected to the pre-pressurization block (13), the thrust bearing (14), and the bearing sleeve (15), and is fixed with a locking nut (24). The second cylinder clamping mechanism includes a honing workpiece (25), a workpiece clamping block (36), a spring top (38), a second clamping cylinder seat (16), and a second clamping cylinder (37). There are four spring tops (38), all of which are located in front of the workpiece clamping block (36). One end of the side of the workpiece clamping block (36) is fixed to the clamping cylinder (37).

2. The servo rotary honing fixture according to claim 1, characterized in that: The outer end face of the rotary positioning shaft (2) is equipped with a sensor sensing block (42), and a sensor bracket (47) is provided on the positioning base plate (22), and a sensor (48) is installed on the sensor bracket (47).

3. The servo rotary honing fixture according to claim 1, characterized in that: The upper end of the rotating mechanism is provided with a positioning pin structure, which includes a positioning pin (10), a positioning sleeve (11) and a positioning mounting plate (12). The positioning pin (10) is fixed on the positioning mounting plate (12) by the positioning sleeve (11).

4. A servo rotary honing fixture according to claim 1, characterized in that: A fixture clamping mechanism is provided on the outside of the rotating mechanism. The fixture clamping mechanism includes a cylinder cross arm (43), a rotary clamping cylinder (45), a cylinder dust cover (44), and a clamping rod (46). The rotary clamping cylinder (45) is fixed on the positioning base plate (22).

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