Numerical control grinding machine pneumatic clamp for gear grinding

Abstract

The invention discloses a numerical control grinding machine pneumatic clamp for gear grinding, and relates to the technical field of clamps. The clamp comprises a clamp body, a clamping mechanism is arranged on the upper surface of the clamp body, and the clamping mechanism comprises a first sliding rod, a driven block, an adjusting plate, a limiting block, a first spring, a sliding groove, a fixing rod and an inserting rod. The vertical position of a bearing plate is controlled through an air cylinder, so that four sets of first sliding rods horizontally move in the opposite directions along the inner wall of the clamp body, limiting blocks, adjusting plates and driven blocks are driven to horizontally move, the included angle between the two sets of adjusting plates is gradually reduced through fixing rods, and therefore the distance between the four sets of first sliding rods is gradually reduced; meanwhile, the angle of the clamping teeth is reduced, the problem that the clamp can only clamp a single type of gear is effectively avoided, the effect of fixing different types of gears can be achieved, meanwhile, the universality of the clamp is provided, and the time needed for replacing the clamp is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of clamps, and in particular to a pneumatic clamp of a numerically controlled grinder used for gear grinding. Background Art

[0002] Gears are mechanical elements with teeth on the rim that can continuously mesh to transmit motion and power. They are mechanical parts with teeth that can mesh with each other. Gears and their gear products are important basic parts of mechanical equipment. Pneumatic clamps are mainly composed of gas-liquid booster cylinders, clamp bodies, and positioning devices. Compressed air is converted into strong pressure through the gas-liquid booster cylinder to push the clamp body to move, so that the clamp body and the positioning device generate clamping force and positioning force, thereby achieving the clamping and positioning of the workpiece. The accuracy of the gear directly affects the key indicators of the performance, stability, reliability and service life of the entire transmission system. In high-precision transmission occasions, such as precision instruments, high-end CNC machine tools and other equipment, small deviations such as gear tooth profile error and pitch error may cause equipment operation failure or reduced accuracy. In order to meet these strict precision requirements, reliable fixtures are needed to fix and position the gear blanks during gear processing to ensure that the relative position between the processing tool and the gear blank is accurate and stable.

[0003] When clamping the gear, it is affected by many factors such as cutting force and vibration. If the fixture cannot effectively fix the gear blank, the blank is prone to displacement and deformation during the processing, resulting in unstable quality of the processed gear and increased scrap rate. In the literature (publication number: CN117817056B), a gear processing fixture is disclosed. Through the cooperation of the inner positioning unit and the outer positioning unit, one set of positioning units can be loosened, so as not to hinder the fine grinding of the two sets of positioning units contacting the processed gear. Through the steering unit, not only can the processed gear be processed at multiple angles, but also the processed gear can be repositioned and clamped after the clamping and positioning are completed and the fine grinding of one side end face is completed without disassembly. When the device is used to position the gear processing, the pneumatic clamp cannot reasonably fit different types of gears, which will cause the pneumatic clamp to have poor adaptability and cannot adjust the pitch of the clamp when clamping the gear. At the same time, it is also impossible to accumulate the grinding fluid during the grinding process, which will cause the gear to be overheated and produce thermal deformation during grinding, thereby affecting the grinding effect of the gear. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems and provide a pneumatic fixture for a CNC grinding machine used for gear grinding.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: A pneumatic clamp for a numerically controlled grinding machine for gear grinding, comprising a clamp body, a clamping mechanism being arranged on the upper surface of the clamp body, the clamping mechanism comprising a sliding bar 1, a driven block, an adjusting plate, a limiting block, a spring 1, a slide groove, a fixing rod and an insertion rod, the limiting block is fitted with the upper surface of the clamp body, the limiting block is fixedly connected to the sliding bar 1, the sliding bar 1 is slidably connected with the inner wall of the clamp body, the following block is fixedly connected to the sliding bar 1, the adjusting plate is rotatably connected with the insertion rod, the adjusting plate is fixedly connected to the spring 1, the adjusting plate is fitted with the inner wall of the driven block, the fixing rod is fixedly connected to the clamp body, the fixing rod is fitted with the inner wall of the slide groove, and the fixing rod is fitted with the outer side of the limiting block; A liquid storage mechanism is provided inside the clamp body, and the liquid storage mechanism includes a connecting rod 1, a rack, a threaded sleeve, a threaded rod, a gear, a lifting platform and a liquid storage tank. The connecting rod 1 is fixedly connected to the sliding rod 1, the connecting rod 1 is slidably connected to the clamp body, one end of the connecting rod 1 is fixedly connected to the rack, the rack is slidably connected to the clamp body, the rack is meshed with the gear, the gear is rotatably connected to the clamp body, the gear is fixedly connected to the threaded sleeve, the threaded sleeve is fitted with the lifting platform, the threaded sleeve is threadedly connected to the threaded rod, the threaded rod is fixedly connected to the lifting platform, and the lifting platform is fitted with the inner wall of the liquid storage tank.

[0006] Furthermore, two sets of drainage grooves are provided on the inner wall of the liquid storage tank, a drainage bucket is fixedly connected to the inside of the clamp body, a drainage pipe is fixedly connected to the lower end of the drainage bucket, the drainage pipe is fixedly connected to the clamp body, and the drainage bucket and the drainage grooves are located in the same vertical plane.

[0007] Furthermore, a limit plate is fixedly connected to the inner side of the driven block, and the limit plate is fixedly connected to the insertion rod.

[0008] Furthermore, a cylinder is fixedly installed inside the clamp body, and a receiving plate is fixedly connected to the output end of the cylinder, and four groups of articulated seats 2 are fixedly installed on the upper surface of the receiving plate, and the surfaces of the four groups of articulated seats 2 are rotatably connected to connecting rods 2, and the upper ends of the connecting rods 2 are rotatably connected to articulated seats 1, and the upper surface of the articulated seat 1 is fixedly connected to the limit block.

[0009] Furthermore, a guard plate is fixedly connected to the inside of the clamp body, a lock shell is fixedly installed on the inner side of the guard plate, a lock ruler is fixedly connected to one side of the receiving plate, and the lock ruler is plugged into the lock shell.

[0010] Furthermore, three groups of blocks are slidably connected inside the lock shell, one side of each of the three groups of blocks is fixedly connected to a sliding rod 2, the sliding rod 2 is slidably plugged into the lock shell, the other end of the sliding rod 2 is fixedly connected to a baffle, and the block is clamped to the lock ruler.

[0011] Furthermore, two groups of electric telescopic rods are fixedly installed inside the guard plate, and the output ends of the two groups of electric telescopic rods are fixedly connected with fixed blocks, the fixed blocks are fitted with the baffle, and the fixed blocks are slidably plugged with the second slide rod.

[0012] Furthermore, one end of the clamping block is fixedly connected to a second spring, and the other end of the second spring is fixedly connected to the lock housing.

[0013] The beneficial effects of the present invention are as follows: 1. The present invention controls the vertical position of the receiving plate through a cylinder, so that the four groups of sliding bars move horizontally toward each other along the inner wall of the clamp body, thereby driving the limit block, the adjustment plate and the driven block to move horizontally, and the angle between the two groups of adjustment plates is gradually reduced through the fixed rod, so that as the spacing between the four groups of sliding bars gradually decreases, the angle of the clamping teeth is also reduced, so that gears of different models and different tooth pitches can be clamped, effectively avoiding the problem that the clamp can only clamp a single model of gears, and can achieve the effect of fixing gears of different models. At the same time, the versatility of the clamp is provided, and the time required for replacing the clamp is reduced.

[0014] 2. The present invention realizes horizontal movement of slide bar 1, so that connecting rod 1 drives rack to move horizontally following slide bar 1, so that the gear meshing with the rack drives threaded sleeve to rotate, and the threaded rod threadedly connected inside the threaded sleeve drives the lifting platform to move vertically upward, thereby reducing the liquid storage capacity of the liquid reservoir, so that when gear grinding is performed, the grinding fluid can be accumulated inside the liquid reservoir, thereby avoiding thermal deformation of the gear during grinding, effectively avoiding the problem of gear damage during gear grinding, and achieving the effect of quickly cooling the gear.

[0015] 3. The present invention drives the receiving plate to move vertically downward through the cylinder, so that the locking ruler moves vertically downward with the receiving plate, and the locking ruler moves to the inside of the lock shell and engages with the clamping block, thereby fixing the vertical position of the lock shell, and then limiting the receiving plate, thereby preventing the four groups of slide bars from returning to their original positions, improving the clamping strength of the clamp, avoiding gear displacement during gear grinding, improving the stability of the clamp during use, and also facilitating the wide promotion of the clamp in actual use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure of the clamping assembly of the present invention; Figure 3 It is a schematic diagram of the structure of the drive assembly of the present invention; Figure 4 The present invention Figure 3 Right view of the local structure diagram; Figure 5 The present invention Figure 3 The right side view shows the structure of the part; Figure 6 It is a schematic diagram of the structure of the self-locking component of the present invention.

[0017] 1. Clamp body; 2. Liquid storage tank; 21. Drain trough; 22. Drain pipe; 23. Drain bucket; 24. Connecting rod 1; 25. Rack; 26. Threaded sleeve; 27. Threaded rod; 28. Gear; 29. ​​Lifting platform; 210. Liquid storage mechanism; 3. Slide bar 1; 31. Articulated seat 1; 32. Connecting rod 2; 33. Articulated seat 2; 34. Adapter plate; 35. Cylinder; 4. Follower block; 41. Limit plate; 42. Adjusting plate; 43. Limit block; 44. Spring 1; 45. Slide; 46. Fixed rod; 47. Insert rod; 48. Clamping mechanism; 5. Guard plate; 51. Electric telescopic rod; 52. Lock shell; 53. Lock ruler; 54. Block; 55. Spring 2; 56. Slide bar 2; 57. Baffle; 58. Fixed block. DETAILED DESCRIPTION

[0018] To make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] Embodiment 1, as Figure 1-Figure 6 As shown, a pneumatic clamp for a CNC grinder for gear grinding comprises a clamp body 1, a clamping mechanism 48 is arranged on the upper surface of the clamp body 1, the clamping mechanism 48 comprises a slide bar 3, a driven block 4, an adjustment plate 42, a limit block 43, a spring 44, a slide groove 45, a fixed rod 46 and an insertion rod 47, the limit block 43 is fitted with the upper surface of the clamp body 1, the limit block 43 is fixedly connected to the slide bar 3, the slide bar 3 is slidably connected to the inner wall of the clamp body 1, the driven block 4 is fixedly connected to the slide bar 3, the adjustment plate 42 is rotatably connected to the insertion rod 47, the adjustment plate 42 is fixedly connected to the spring 44, the adjustment plate 42 is fitted with the inner wall of the driven block 4, the fixed rod 46 is fixedly connected to the clamp body 1, the fixed rod 46 is fitted with the inner wall of the slide groove 45, and the fixed rod 46 is fitted with the outer side of the limit block 43; A liquid storage mechanism 210 is arranged inside the clamp body 1, and the liquid storage mechanism 210 includes a connecting rod 24, a rack 25, a threaded sleeve 26, a threaded rod 27, a gear 28, a lifting platform 29 and a liquid storage tank 2. The connecting rod 24 is fixedly connected to the sliding rod 3, the connecting rod 24 is slidably connected to the clamp body 1, one end of the connecting rod 24 is fixedly connected to the rack 25, the rack 25 is slidably connected to the clamp body 1, the rack 25 is meshed with the gear 28, the gear 28 is rotatably connected to the clamp body 1, the gear 28 is fixedly connected to the threaded sleeve 26, the threaded sleeve 26 is fitted with the lifting platform 29, the threaded sleeve 26 is threadedly connected to the threaded rod 27, the threaded rod 27 is fixedly connected to the lifting platform 29, and the lifting platform 29 is fitted with the inner wall of the liquid storage tank 2.

[0020] The gear fixture usually needs to be replaced with a fixture of the corresponding model according to the different types of gears, so as to maximize the guarantee that the gear will not be offset during the grinding process. At the same time, gears of the same size may also have different pitches. A single clamping tooth is difficult to adapt to gears with different pitches. In the process of the fixture fitting the gear to be ground, the sliding rod 3 drives the driven block 4 to move horizontally. When the driven block 4 moves horizontally, the adjustment plate 42 fits against the fixed rod 46. The fixed rod 46 gradually reduces the angle between the two groups of adjustment plates 42, so that the spring 44 is compressed. The elastic force of the spring 44 maintains the two groups of adjustment plates 42 at the current angle, so that the intersection of the two groups of adjustment plates 42 meshes with the gear to be ground, so that the fixture can solve the problem of large pitch of large gears and small pitch of small gears, thereby being able to clamp gears of different models to be ground. When the slide bar 3 moves horizontally, the connecting rod 24 fixedly connected to the surface of the slide bar 3 moves horizontally along the slide bar 3, thereby driving the rack 25 to move horizontally along the inner wall of the fixture body 1, so that the gear 28 meshing on the surface of the rack 25 drives the threaded sleeve 26 to rotate, so that the threaded rod 27 threadedly connected to the inside of the threaded sleeve 26 drives the lifting platform 29 to move vertically upward along the inner wall of the liquid reservoir 2, thereby reducing the liquid storage volume of the liquid reservoir 2, and then solving the problem of large gear grinding time with high grinding fluid consumption and small gear grinding time with low grinding fluid consumption, so as to achieve the effect of accumulating grinding fluid. When grinding, the debris and grinding fluid generated during grinding flow into the interior of the liquid reservoir 2, so that the grinding fluid fits against the lower surface of the gear, and the heat generated by the gear grinding is absorbed by the grinding fluid to avoid thermal deformation of the gear.

[0021] Embodiment 2, based on the above embodiment, further includes: two groups of drainage grooves 21 are opened on the inner wall of the liquid storage tank 2, a drainage bucket 23 is fixedly connected to the inside of the clamp body 1, a drainage pipe 22 is fixedly connected to the lower end of the drainage bucket 23, the drainage pipe 22 is fixedly connected to the clamp body 1, and the drainage bucket 23 and the drainage grooves 21 are located in the same vertical plane.

[0022] After the gear is processed, the slide rod 3 is restored to its original position through the cylinder 35, and then the lifting platform 29 and the threaded rod 27 are restored to their original positions, so that the grinding fluid and the debris generated by grinding are discharged to the outside of the fixture through the drainage bucket 23 and the drainage pipe 22, thereby facilitating the collection and reuse of the grinding fluid, while preventing the debris generated by grinding from being deposited on the surface of the lifting platform 29, and reducing the time required for manual cleaning.

[0023] Embodiment 3, based on the above embodiment, further includes: a limit plate 41 is fixedly connected to the inner side of the driven block 4 , and the limit plate 41 is fixedly connected to the insertion rod 47 .

[0024] When the slide bar 3 moves horizontally, the driven block 4 moves horizontally with the slide bar 3, so that the limit plate 41 moves horizontally to the upper surface of the gear to be ground, so that the limit plate 41 fits with the gear to be ground, thereby limiting the vertical surface of the gear to be ground and avoiding vertical displacement of the gear during the grinding process.

[0025] Embodiment 4, as Figure 3 , Figure 5 As shown, on the basis of the above embodiment, a driving component structure is provided, wherein a cylinder 35 is fixedly installed inside the clamp body 1, and an output end of the cylinder 35 is fixedly connected to a receiving plate 34, and four groups of articulated seats 2 33 are fixedly installed on the upper surface of the receiving plate 34, and the surfaces of the four groups of articulated seats 2 33 are all rotatably connected to connecting rods 2 32, and the upper end of the connecting rods 2 32 is rotatably connected to an articulated seat 1 31, and the upper surface of the articulated seat 1 31 is fixedly connected to a limit block 43.

[0026] When clamping the gear, the gear to be ground is placed on the upper surface of the fixture body 1, and the cylinder 35 is started. The cylinder 35 drives the receiving plate 34 to move vertically downward, so that the four groups of hinged seats 2 33 fixedly installed on the upper surface of the receiving plate 34 move vertically downward along with the receiving plate 34, so that the connecting rod 2 32 rotatably connected to the surface of the hinged seat 2 33 deflects with the hinged seat 2 33 as the center, thereby driving the hinged seat 1 31 and the slide bar 1 3 to move horizontally, so that the four groups of slide bars 1 3 move horizontally toward the center at the same time, thereby gradually fitting with the surface of the gear to be ground.

[0027] Embodiment 5, as Figure 5 , Figure 6As shown, on the basis of the above embodiment, it also includes that the interior of the clamp body 1 is fixedly connected with a guard plate 5, the inner side of the guard plate 5 is fixedly installed with a lock shell 52, and one side of the receiving plate 34 is fixedly connected with a lock ruler 53, and the lock ruler 53 is plugged into the lock shell 52. When the clamp is in use, the lock ruler 53 is driven by the receiving plate 34 to move vertically downward, so that the lock ruler 53 is slidably plugged into the interior of the lock shell 52, thereby limiting the receiving plate 34 and improving the stability of the clamp when in use.

[0028] Embodiment six, as Figure 6 As shown, on the basis of the above embodiment, a self-locking component structure is further provided, three groups of clamping blocks 54 are slidably connected inside the lock shell 52, one side of the three groups of clamping blocks 54 is fixedly connected with a second slide bar 56, the second slide bar 56 is slidably plugged into the lock shell 52, the other end of the second slide bar 56 is fixedly connected with a baffle 57, the clamping blocks 54 are clamped with the locking ruler 53, and the three groups of clamping blocks 54 can achieve the effect of self-locking of gears of different models, thereby improving the versatility of the clamp.

[0029] Embodiment 7, on the basis of the above embodiment, further includes: two groups of electric telescopic rods 51 are fixedly installed inside the guard plate 5, and the output ends of the two groups of electric telescopic rods 51 are fixedly connected with fixed blocks 58, the fixed blocks 58 are fitted with the baffle 57, and the fixed blocks 58 are slidably plugged with the second slide bar 56, which can achieve the effect of unlocking the lock ruler 53, avoiding accidental touch during gear grinding to cause the clamp to loosen, thereby improving the safety of the clamp when in use.

[0030] Embodiment 8, based on the above embodiment, further includes that one end of the clamping block 54 is fixedly connected to the spring 2 55, and the other end of the spring 2 55 is fixedly connected to the lock shell 52, and the elastic force of the spring 2 55 generates pressure on the clamping block 54, thereby preventing the vertical position of the lock ruler 53 from changing, thereby improving the clamping strength of the clamp.

[0031] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pneumatic fixture for a CNC grinding machine for gear grinding, comprising a fixture body (1), characterized in that: The upper surface of the clamp body (1) is provided with a clamping mechanism (48), wherein the clamping mechanism (48) comprises a slide bar (3), a driven block (4), an adjusting plate (42), a limit block (43), a spring (44), a slide groove (45), a fixed rod (46) and an insert rod (47), wherein the limit block (43) is in contact with the upper surface of the clamp body (1), the limit block (43) is fixedly connected to the slide bar (3), and the slide bar (3) is fixedly connected to the clamp body (1). The inner wall of the driven block (4) is slidably connected, the driven block (4) is fixedly connected to the slide rod (3), the adjusting plate (42) is rotatably connected to the insert rod (47), the adjusting plate (42) is fixedly connected to the spring (44), the adjusting plate (42) is fitted with the inner wall of the driven block (4), the fixing rod (46) is fixedly connected to the clamp body (1), the fixing rod (46) is fitted with the inner wall of the slide groove (45), and the fixing rod (46) is fitted with the outer side of the limit block (43); A liquid storage mechanism (210) is provided inside the clamp body (1), and the liquid storage mechanism (210) comprises a connecting rod (24), a rack (25), a threaded sleeve (26), a threaded rod (27), a gear (28), a lifting platform (29) and a liquid storage tank (2), wherein the connecting rod (24) is fixedly connected to the sliding rod (3), the connecting rod (24) is slidably connected to the clamp body (1), one end of the connecting rod (24) is fixedly connected to the rack (25), and the rack (25) is slidably connected to the clamp body (1), the rack (25) is meshed with the gear (28), the gear (28) is rotatably connected to the clamp body (1), the gear (28) is fixedly connected to the threaded sleeve (26), the threaded sleeve (26) is fitted with the lifting platform (29), the threaded sleeve (26) is threadedly connected to the threaded rod (27), the threaded rod (27) is fixedly connected to the lifting platform (29), and the lifting platform (29) is fitted with the inner wall of the liquid storage tank (2).

2. A pneumatic fixture for gear grinding of a CNC grinding machine according to claim 1, characterized in that: The inner wall of the liquid storage tank (2) is provided with two groups of liquid drainage grooves (21); a liquid drainage bucket (23) is fixedly connected to the inside of the clamp body (1); a liquid drainage pipe (22) is fixedly connected to the lower end of the liquid drainage bucket (23); the liquid drainage pipe (22) is fixedly connected to the clamp body (1); and the liquid drainage bucket (23) and the liquid drainage grooves (21) are located on the same vertical plane.

3. The pneumatic fixture for gear grinding of a CNC grinder according to claim 1, characterized in that: A limit plate (41) is fixedly connected to the inner side of the driven block (4), and the limit plate (41) is fixedly connected to the insertion rod (47).

4. The pneumatic fixture for gear grinding of a CNC grinder according to claim 1, characterized in that: A cylinder (35) is fixedly installed inside the clamp body (1), and the output end of the cylinder (35) is fixedly connected to a receiving plate (34), and the upper surface of the receiving plate (34) is fixedly installed with four groups of hinged seats (33), and the surfaces of the four groups of hinged seats (33) are all rotatably connected to connecting rods (32), and the upper end of the connecting rods (32) is rotatably connected to hinged seat (31), and the upper surface of the hinged seat (31) is fixedly connected to a limit block (43).

5. A pneumatic fixture for a CNC grinding machine for gear grinding according to claim 4, characterized in that: A guard plate (5) is fixedly connected to the inside of the clamp body (1), a lock shell (52) is fixedly installed on the inner side of the guard plate (5), a lock ruler (53) is fixedly connected to one side of the receiving plate (34), and the lock ruler (53) is plugged into the lock shell (52).

6. The pneumatic fixture for gear grinding of a CNC grinder according to claim 5, characterized in that: Three groups of clamping blocks (54) are slidably connected inside the lock housing (52), one side of each of the three groups of clamping blocks (54) is fixedly connected to a second slide bar (56), the second slide bar (56) is slidably plugged into the lock housing (52), the other end of the second slide bar (56) is fixedly connected to a baffle (57), and the clamping blocks (54) are clamped to the lock ruler (53).

7. The pneumatic fixture for gear grinding of a CNC grinding machine according to claim 5, characterized in that: Two groups of electric telescopic rods (51) are fixedly installed inside the guard plate (5), and the output ends of the two groups of electric telescopic rods (51) are fixedly connected to fixed blocks (58), the fixed blocks (58) are fitted with the baffle plate (57), and the fixed blocks (58) are slidably plugged with the second slide rod (56).

8. The pneumatic fixture for gear grinding of a CNC grinding machine according to claim 6, characterized in that: One end of the clamping block (54) is fixedly connected to a second spring (55), and the other end of the second spring (55) is fixedly connected to the lock housing (52).

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