Lathe chuck-type fixture

Abstract

The utility model discloses a lathe chuck type clamp relates to chuck type clamp technical field, including the chuck base and the air cylinder of chuck base inside installation, the top surface fixedly connected with support cover of chuck base, the outer wall of support cover is equipped with three along the containing groove of equal interval of support cover outer wall, the inside of containing groove is equipped with tongs, the tongs is C character shape, the inner chamber slidingly connected with mobile round plate of support cover, the bottom surface of mobile round plate is fixedly connected with the output end of air cylinder. The utility model discloses through the collaborative design of mobile round plate downlink and fixed blocking device, has realized the active type unloading, has solved the problem of being stuck with the positioning core axle because of the deformation or the tolerance of workpiece inner hole, the whole clamping and unloading process does not need artificial knocking, the action is smooth, has improved production efficiency greatly, avoids the scratch of the workpiece machined surface because of knocking through nondestructive unloading, also has protected the precision and life of clamp itself.

Description

Technical Field

[0001] This utility model relates to the field of chuck fixture technology, and in particular to a lathe chuck fixture. Background Technology

[0002] In the field of machining, lathes are common equipment used for cutting and machining load-bearing workpieces. For automotive load-bearing parts with central internal holes, such as sleeves and flanges, chuck-type fixtures are usually used to fix them in place to ensure stability and precision machining during processing.

[0003] In the prior art, a common type of fixture uses a combination of mandrel positioning and radial clamping. That is, a fixed mandrel is inserted into the inner hole of the workpiece for positioning, and then external jaws or clamps are used to radially clamp the workpiece from the outer wall to transmit torque. However, such fixtures have the following significant drawbacks in practical use;

[0004] After machining, due to cutting forces, thermal deformation, or tolerances in the workpiece's internal dimensions, an interference fit or seizing may occur between the workpiece's inner wall and the locating mandrel, making it difficult to remove the workpiece from the mandrel. Operators usually need to use tools to knock the workpiece to unload it, which not only reduces production efficiency but also easily scratches the machined surface of the workpiece, leading to an increased scrap rate, and may even damage the precision of the fixture itself during the knocking process. Utility Model Content

[0005] The purpose of this utility model is to provide a lathe chuck-type fixture to solve the problem mentioned in the background art that after the existing workpiece is processed, due to cutting force, thermal deformation or tolerance of the inner hole size of the workpiece itself, interference fit or seizing may occur between the inner wall of the workpiece and the positioning mandrel, making it difficult to remove the workpiece from the mandrel.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lathe chuck-type fixture, comprising a fixture base and a cylinder installed inside the fixture base, a support cover fixedly connected to the top surface of the fixture base, three receiving grooves equally spaced along the outer wall of the support cover, clamps C-shaped provided inside the receiving grooves, and a movable circular plate slidably connected to the inner cavity of the support cover, the bottom surface of the movable circular plate being fixedly connected to the output end of the cylinder;

[0007] The top surface of the movable circular plate is fixedly connected to a connecting rod 1, and the top end of the connecting rod 1 is fixedly connected to an insert circular plate that is inserted into the inner cavity of the workpiece. The inside of the support cover is provided with three sector plates, and the side walls of the sector plates and the side walls of the support cover are fixedly connected to a connecting rod 2.

[0008] A push rod is rotatably connected to the top of the movable circular plate. The top of the push rod is rotatably connected to the corner of the bottom surface of the clamp. Three sector plates are located on the top surface of the movable circular plate and are arranged at equal intervals along the center of the movable circular plate 7. The adjacent sector plates are rotatably connected to the bottom end of the clamp.

[0009] A blocking device is fixedly connected to the top surface of the support cover. When the moving circular plate drives the insertion circular plate and the processed part sleeved on the outside of the insertion circular plate to move downward, the blocking device is used to support the processed part so that the processed part is separated from the insertion circular plate.

[0010] Preferably, the top surface of the support cover is fixedly connected to two side baffles, which are used to circumferentially limit the workpiece and prevent it from rotating during processing.

[0011] Preferably, one of the side baffles has a threaded connection at its top end to an abutment bolt, one end of which is used to abut against the outer wall of the workpiece. The side wall of the other side baffle is used to abut against the outer wall of the workpiece.

[0012] Preferably, the blocking device includes a blocking ring fixed to the top surface of the support cover, and three blocking rods arranged in a circumferential array along the top surface of the blocking ring are fixedly connected to the top of the blocking ring, and rubber blocks are fixedly connected to the top surface of the blocking rods.

[0013] Preferably, the bottom surface of the clamp is provided with a rotating groove, which is used to accommodate the push rod and the clamp.

[0014] Preferably, the top of the clamp is fitted with a rubber sleeve.

[0015] The technical effects and advantages of this utility model are as follows: This utility model achieves active unloading through the coordinated design of the moving circular plate descending and the fixed blocking device, which solves the problem of jamming with the positioning mandrel caused by the deformation or tolerance of the inner hole of the workpiece. The entire clamping and unloading process does not require manual hammering, and the operation is smooth, which greatly improves production efficiency. The non-destructive unloading avoids scratches on the machined surface of the workpiece caused by hammering, and also protects the accuracy and life of the fixture itself. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 .

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 .

[0018] Figure 3 This is a schematic diagram of the sector plate structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the blocking ring structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the clamping part of the present invention.

[0021] In the diagram: 1. Fixture base; 2. Support cover; 21. Receiving groove; 3. Blocking ring; 31. Blocking rod; 32. Rubber block; 4. Side baffle; 41. Abutment bolt; 5. Clamp; 51. Rotating groove; 6. Insertion round plate; 61. Connecting rod one; 7. Moving round plate; 71. Push rod; 8. Sector plate; 81. Connecting rod two; 9. Machining part. Detailed Implementation

[0022] 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.

[0023] This utility model provides, for example Figure 1-5 The lathe chuck fixture shown includes a fixture base 1 and a cylinder installed inside the fixture base 1. A support cover 2 is fixedly connected to the top surface of the fixture base 1. Three receiving grooves 21 with equal spacing along the outer wall of the support cover 2 are opened. A clamp 5 is provided inside the receiving groove 21. The clamp 5 is C-shaped. A movable circular plate 7 is slidably connected in the inner cavity of the support cover 2. The bottom surface of the movable circular plate 7 is fixedly connected to the output end of the cylinder.

[0024] A connecting rod 61 is fixedly connected to the top surface of the movable circular plate 7. The top end of the connecting rod 61 is fixedly connected to the inserting circular plate 6, which is inserted into the inner cavity of the workpiece 9. The support cover 2 is provided with three fan-shaped plates 8. The side walls of the fan-shaped plates 8 and the side walls of the support cover 2 are fixedly connected to the connecting rod 81.

[0025] A push rod 71 is fixedly connected to the top of the movable circular plate 7. The top of the push rod 71 is rotatably connected to the corner of the bottom surface of the clamp 5. Three sector plates 8 are located on the top surface of the movable circular plate 7, and the three sector plates 8 are arranged at equal intervals along the center of the movable circular plate 7. Adjacent sector plates 8 are rotatably connected to the bottom end of the clamp 5.

[0026] A blocking device is fixedly connected to the top surface of the support cover 2. When the moving circular plate 7 drives the insertion circular plate 6 and the processing part 9 sleeved on the outside of the insertion circular plate 6 to move downward, the blocking device is used to support the processing part 9 so that the processing part 9 is separated from the insertion circular plate 6.

[0027] First, fix the fixture base 1 onto the lathe spindle. Place the sleeve-type workpiece 9 to be machined onto the blocking device at the top of the support cover 2. Start the cylinder, causing its output end to push the moving circular plate 7 upwards within the support cover 2. Simultaneously, the moving circular plate 7 drives the connecting rod 61 and the push rod 71 on it to rise together.

[0028] First, positioning and clamping are performed. The insertable circular plate 6 at the top of the connecting rod 61 is inserted into the inner cavity of the workpiece 9 to complete radial precision positioning. At the same time, the top of the push rod 71 is rotatably connected to the corner of the bottom of the C-shaped clamp 5. Its upward movement forces the middle of the clamp 5 to move with levers around the contact point between the clamp 5 and the support cover 2. This causes the top of the clamp 5 to retract inward and firmly grip the outer wall of the workpiece 9 from the outside.

[0029] Then the unloading process begins. After processing is complete, the cylinder pulls the moving circular plate 7 downwards. The moving circular plate 7 drives the insertion circular plate 6 to actively exit from the inner cavity of the workpiece 9. At this time, the bottom surface of the workpiece 9 is supported by a fixed blocking device, thereby forcibly separating it from the downward-moving insertion circular plate 6, so that it can automatically fall or be removed.

[0030] This utility model achieves active unloading through the coordinated design of the downward movement of the moving circular plate 7 and the fixed blocking device, which solves the problem of jamming with the positioning mandrel caused by deformation or tolerance of the inner hole of the workpiece. The entire clamping and unloading process does not require manual hammering, and the operation is smooth, which greatly improves production efficiency. The non-destructive unloading avoids scratches on the machined surface of the workpiece caused by hammering, and also protects the precision and life of the fixture itself.

[0031] like Figure 1 and Figure 2 As shown, two side baffles 4 are fixedly connected to the top surface of the support cover 2. The two side baffles 4 are used to circumferentially limit the workpiece 9 and prevent the workpiece 9 from rotating during processing.

[0032] Two side baffles 4 are symmetrically fixed on both sides of the workpiece 9 on the top surface of the support cover 2. When the workpiece 9 is placed, its outer wall will approach or contact these two side baffles 4. When the clamp 5 radially clamps the workpiece, the two side baffles 4 work together to prevent the workpiece 9 from rotating circumferentially or shifting under the action of cutting force.

[0033] like Figure 1 As shown, one of the side baffles 4 has a threaded connection at its top end to an abutment bolt 41, one end of which is used to abut against the outer wall of the workpiece 9. The side wall of the other side baffle 4 is used to abut against the outer wall of the workpiece 9.

[0034] One of the two side plates 4 is fitted with an abutment bolt 41 through its threaded hole at the top. The abutment bolt 41 is rotated so that its end advances and abuts tightly against the outer wall of the workpiece 9. The other side plate 4 remains fixed, its sidewall directly contacting the outer wall of the workpiece, thus limiting the workpiece from both sides. The design of the abutment bolt 41 allows the fixture to accommodate workpieces 9 of different diameters within a certain range, providing the necessary dimensional tolerance and enhancing the versatility of the fixture.

[0035] like Figure 4 As shown, the blocking device includes a blocking ring 3 fixed to the top surface of the support cover 2. Three blocking rods 31 arranged in a circumferential array along the top surface of the blocking ring 3 are fixedly connected to the top of the blocking ring 3. Rubber blocks 32 are fixedly connected to the top surface of the blocking rods 31.

[0036] The blocking device consists of a blocking ring 3 fixed to the top surface of the support cover 2. Three vertical blocking rods 31 are evenly welded along the circumference at the top of the blocking ring 3. A rubber block 32 is fixed to the top surface of each blocking rod 31 by adhesive or nesting. The workpiece 9 is placed directly on these three rubber blocks 32, and the blocking rods 31 provide a stable axial support plane for the workpiece. The top rubber block 32 acts as a buffer, preventing scratches on the bottom surface of the workpiece and absorbing impact and reducing noise during unloading.

[0037] like Figure 5 As shown, a rotating groove 51 is provided on the bottom surface of the clamp 5. The rotating groove 51 is used to accommodate the swing space generated by the relative rotation of the push rod 71 and the clamp 5. On the bottom surface of the C-shaped clamp 5, corresponding to the position where it is rotatably connected to the push rod 71, a long strip-shaped rotating groove 51 is machined. When the push rod 71 moves up and down and rotates relative to the clamp 5, its rod body can swing freely in the space of the rotating groove 51 without structural interference with the bottom of the clamp 5.

[0038] like Figure 3 As shown, a rubber sleeve is fitted on the top of the clamp 5. At the top of the clamp 5, which is the part that directly contacts the outer wall of the workpiece 9, a rubber sleeve made of elastic material such as rubber or polyurethane is fitted to effectively prevent the hard metal clamp from directly contacting the workpiece and avoid crushing or scratching the finished outer surface of the workpiece during the clamping process.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A lathe chuck-type fixture, comprising a fixture base (1) and a cylinder installed inside the fixture base (1), characterized in that: The top surface of the clamp base (1) is fixedly connected to a support cover (2). The outer wall of the support cover (2) is provided with three accommodating grooves (21) spaced equally along the outer wall of the support cover (2). The accommodating grooves (21) are provided with clamps (5). The clamps (5) are C-shaped. A movable circular plate (7) is slidably connected in the inner cavity of the support cover (2). The bottom surface of the movable circular plate (7) is fixedly connected to the output end of the cylinder. The top surface of the movable circular plate (7) is fixedly connected to a connecting rod (61), and the top end of the connecting rod (61) is fixedly connected to an inserting circular plate (6) inserted into the inner cavity of the workpiece (9). The inside of the support cover (2) is provided with three fan-shaped plates (8), and the side wall of the fan-shaped plate (8) and the side wall of the support cover (2) are fixedly connected to a connecting rod (81). The top of the movable circular plate (7) is rotatably connected to a push rod (71), the top of the push rod (71) is rotatably connected to the corner of the bottom surface of the clamp (5), the three sector plates (8) are located on the top surface of the movable circular plate (7), and the three sector plates (8) are arranged at equal intervals along the center of the movable circular plate (7), and the adjacent sector plates (8) are rotatably connected to the bottom end of the clamp (5). The top surface of the support cover (2) is fixedly connected with a blocking device. When the moving circular plate (7) drives the insertion circular plate (6) and the processing part (9) sleeved on the outside of the insertion circular plate (6) to move downward, the blocking device is used to support the processing part (9) so that the processing part (9) is separated from the insertion circular plate (6).

2. The lathe chuck-type fixture according to claim 1, characterized in that: The top surface of the support cover (2) is fixedly connected to two side baffles (4), which are used to circumferentially limit the workpiece (9).

3. A lathe chuck-type fixture according to claim 2, characterized in that: One of the side baffles (4) has a threaded connection at the top end with an abutment bolt (41), one end of which is used to abut against the outer wall of the workpiece (9), and the side wall of the other side baffle (4) is used to abut against the outer wall of the workpiece (9).

4. A lathe chuck-type fixture according to claim 1, characterized in that: The blocking device includes a blocking ring (3) fixed on the top surface of the support cover (2), and three blocking rods (31) arranged in a circumferential array along the top surface of the blocking ring (3) are fixedly connected to the top of the blocking ring (3). A rubber block (32) is fixedly connected to the top surface of the blocking rod (31).

5. A lathe chuck-type fixture according to claim 1, characterized in that: The bottom surface of the clamp (5) is provided with a rotating groove (51), which is used to accommodate the push rod (71) and the clamp (5).

6. A lathe chuck-type fixture according to claim 1, characterized in that: The clamp (5) is fitted with a rubber sleeve at its top.

Images