A two-jaw chuck that can conveniently adjust the processing angle of a workpiece

Abstract

The present invention belongs to the field of mechanical processing technology, and specifically relates to a two-jaw chuck that is convenient for adjusting the processing angle of a workpiece, comprising a chuck body, a clamping jaw and a workpiece clamping block, a cavity is provided inside the chuck body, a clamping jaw displacement driving assembly is provided in the cavity of the chuck body, two clamping jaws are relatively connected to the upper surface of the chuck, one end of the two clamping jaws close to the chuck body is connected to the clamping jaw displacement driving assembly, and the clamping jaw displacement driving assembly can make the two clamping jaws close to or away from each other by a certain distance on the chuck body, and the ends of the two clamping jaws away from the chuck body are both rotated to connect the clamping block connecting shaft, and the ends of the two clamping block connecting shafts close to each other are the clamping block connecting ends, and the other end of at least one clamping block connecting shaft can be positioned and locked by a positioning and locking structure, and the side of the two workpiece clamping blocks close to each other is provided with a clamping structure matching the shape of the workpiece. The present invention has the advantages of being universal, convenient for adjusting the processing angle of the workpiece, and stable.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a two-jaw chuck which is convenient for adjusting the processing angle of a workpiece. Background Art

[0002] Most of the existing two-jaw and three-jaw automatic hydraulic chucks can only fix and process workpieces in one direction, and cannot complete all processing tasks for workpieces that need to be processed at multiple angles. If such chucks are used for processing, the workpiece needs to be clamped multiple times, and tooling with multiple different angles needs to be made to cooperate.

[0003] At the same time, the common two-jaw and three-jaw automatic hydraulic chuck jaws have low repeatability and poor stability. Before processing, the operator needs to re-turn the chuck jaws according to the clamping position and clamping size of the tooling, and the jaws need to be re-turned after each replacement, and the reuse rate of the jaws is low.

[0004] Secondly, ordinary two-jaw and three-jaw hydraulic chucks have great limitations on the position of the clamping tooling. For workpieces that require multi-angle processing, the matching tooling is large in size and difficult to clamp. During the processing of the parts, the clamping jaws and tooling will cause certain dangers when performing too fast rotational motion, and the complex overall structure leads to insufficient rigidity and unstable structure. There are great obstacles in setting the processing parameters of the workpiece. In many cases, due to the limitations of the chuck and the supporting tooling, the cutting method of reducing the spindle speed, reducing the cutting amount and reducing the feed speed is used for processing. The inefficient cutting parameter ratio results in inconsistent product processing dimensions, uncontrollable quality, slow production speed and frequent accidents. Ordinary chucks are extremely difficult to produce when facing such workpieces, and the processing cost remains high.

[0005] The only chuck that can rotate at present can only rotate a fixed 45 degrees, which cannot meet the processing requirements for workpieces with angles other than multiples of 45 degrees (such as 43 degrees, 85 degrees, etc.). It also requires the production of multiple tooling to coordinate, resulting in heavy pre-production preparation work, reduced production speed, and increased production difficulty, facing the same difficulties as ordinary chucks. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a two-jaw chuck for convenient adjustment of the workpiece processing angle, aiming to design a universal, easily adjustable and stable chuck for workpieces that need to be processed at different angles, thereby reducing the technical requirements for production and debugging personnel and reducing the time required for adjustment.

[0007] The present invention is implemented in this way, providing a two-jaw chuck that is convenient for adjusting the processing angle of a workpiece, comprising a chuck body, a clamping jaw and a workpiece clamping block, a cavity is provided inside the chuck body, a clamping jaw displacement driving assembly is provided in the cavity of the chuck body, two clamping jaws are relatively connected to the upper surface of the chuck body, one end of the two clamping jaws close to the chuck body is connected to the clamping jaw displacement driving assembly, the clamping jaw displacement driving assembly can make the two clamping jaws approach or move away from each other by a certain distance on the chuck body, the ends of the two clamping jaws away from the chuck body are both rotatably connected to the clamping block connecting shaft, the ends of the two clamping block connecting shafts close to each other are the clamping block connecting ends, the other end of at least one clamping block connecting shaft can be positioned and locked by a positioning and locking structure, and the sides of the two workpiece clamping blocks close to each other are provided with a clamping structure matching the shape of the workpiece; The clamping claw displacement driving assembly comprises a transmission column and two transmission connecting rods, one end of the transmission column away from the clamping claw is connected to the driving rod, the outer wall of the transmission column is provided with a circle of arc surface groove, the side of the chuck body away from the clamping claw is provided with a hole for the transmission column to movably pass through, the two clamping claws are provided with spherical grooves on the sides close to the chuck body, one end of the two transmission connecting rods is provided with a first transmission ball, and the other end is provided with a second transmission ball, the two first transmission balls are matched in the arc surface groove of the transmission column, the two second transmission balls are matched in the two spherical grooves respectively, and the central positions of the two transmission connecting rods are rotatably connected to the inner wall of the chuck body through a limit shaft, and the end of the driving rod away from the transmission column is connected to the machine tool drive; The positioning and locking structure includes a positioning plate and a locking structure. A positioning square is provided at one end of the clamp block connecting shaft away from the clamp block connecting end, and a square hole matching the positioning square is provided on the positioning plate. The locking structure includes a locking block, a locking bolt and a fixing clamp. The locking block is slidably connected to the claw in a direction that allows it to approach or move away from the positioning plate. The fixing clamp is fixedly clamped on the claw. The locking bolt is threadedly connected to the fixing clamp. The locking block is pressed against or released from the positioning plate by rotating the locking bolt.

[0008] Further preferably, one end of the driving rod away from the transmission column is connected to a machine tool pull rod drive.

[0009] Further preferably, a protrusion / groove track connecting the claws is provided on one side of the chuck body connected to the claws, and the two claws are provided with a groove / protrusion structure that slidably matches the protrusion / groove track.

[0010] Further preferably, the positioning piece is a circular piece having a plurality of corresponding cross-sections arranged on the outer circumference according to the processing angle of the workpiece, and the locking block bears against the corresponding cross-sections during locking.

[0011] Further preferably, the clamping structure of the workpiece clamping block is a contoured structure machined according to a digital model of the workpiece.

[0012] The present invention provides a two-jaw chuck that is convenient for adjusting the processing angle of a workpiece. Compared with the prior art, the present invention has the following advantages: 1: The workpiece can be clamped once to complete processing tasks at different angles, saving time and effort; 2: When changing different workpieces in the same batch, there is no need for excessive operations, just loosen the workpiece clamp; 3: When changing different workpieces for processing, replace the corresponding angle block and workpiece clamp, which greatly reduces the operation difficulty and adjustment time; 4: Good versatility, can take into account special workpieces at any angle, and can clamp regardless of the shape of the blank. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A structural diagram of the two-jaw chuck provided by the present invention (the chuck body position shows the internal structure); Figure 2 A schematic diagram of the two jaws of the two-jaw chuck provided by the present invention being opened (the chuck body position shows the internal structure); Figure 3 This is a structural diagram of a claw with a positioning and locking structure; Figure 4 This is a structural diagram of the claw without a positioning locking structure; Figure 5 It is a schematic diagram of the installation of the positioning locking structure on the claw; Figure 6 A positioning piece for the first structure; Figure 7 A positioning piece of the second structure; Figure 8 This is a positioning piece of the third structure. DETAILED DESCRIPTION

[0014] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0015] refer to Figure 1-Figure 8The present invention provides a two-jaw chuck for conveniently adjusting the processing angle of a workpiece, comprising a chuck body 1, a clamping jaw 2 and a workpiece clamping block 3. A cavity is provided inside the chuck body 1, and a clamping jaw displacement driving assembly is provided in the cavity of the chuck body 1. The two clamping jaws 2 are relatively connected to the upper surface of the chuck body 1, and one end of the two clamping jaws 2 close to the chuck body 1 is connected to the clamping jaw displacement driving assembly. The clamping jaw displacement driving assembly can make the two clamping jaws 2 approach or move away from each other on the chuck body 1 by a certain distance. The ends of the two clamping jaws 2 away from the chuck body 1 are both rotatably connected to the clamping block connecting shaft 4, and the ends of the two clamping block connecting shafts 4 close to each other are the clamping block connecting ends, and the other end of at least one clamping block connecting shaft 4 can be positioned and locked by a positioning and locking structure, and the side where the two workpiece clamping blocks 3 are close to each other is provided with a clamping structure matching the shape of the workpiece.

[0016] When using the two-jaw chuck provided by the present invention to clamp a workpiece for processing, a workpiece clamp block 3 matching the target workpiece is installed on the clamp block connecting end of the clamp block connecting shaft 4, and a positioning locking mechanism is used to control the clamp block connecting shaft 4 to rotate to the target angle and lock it according to the processing position, and the workpiece is placed on the workpiece clamp block 3 at the lower end, and the two clamping jaws 2 are driven to approach and clamp each other through the clamping jaw displacement driving assembly, so that a processing position of the workpiece can be processed by the machine tool; after the processing is completed, the clamp block connecting shaft 4 is released through the positioning locking mechanism, and the clamp block connecting shaft 4 can be rotated to various angles at will, but the workpiece is still clamped between the two workpiece clamp blocks 3. In this embodiment, only one clamping jaw 2 is provided with a positioning locking mechanism. After the other processing position of the workpiece is rotated into place, the positioning locking mechanism is used to realize positioning and locking, and the processing of this position is performed until all the positions to be processed of the workpiece are completed.

[0017] As a specific implementation of a jaw displacement drive assembly, the jaw displacement drive assembly includes a transmission column 5 and two transmission connecting rods 6. The end of the transmission column 5 away from the jaw 2 is connected to a driving rod 7. The outer wall of the transmission column 5 is provided with a circle of arc grooves 8. The side of the chuck body 1 away from the jaw 2 is provided with a hole for the transmission column 5 to move through. The two jaws 2 are close to the chuck body 1. The sides are provided with spherical grooves 11. One end of the two transmission connecting rods 6 is provided with a first transmission ball 9, and the other end is provided with a second transmission ball 10. The two first transmission balls 9 are both matched in the arc groove of the transmission column 5, and the two second transmission balls 10 are respectively matched in the two spherical grooves 11. The central positions of the two transmission connecting rods 6 are rotatably connected to the inner wall of the chuck body 1 through a limiting shaft 12, and the end of the driving rod 7 away from the transmission column 5 is connected to the machine tool drive.

[0018] During the working process of the jaw displacement drive assembly, the drive rod 7 is pulled by the machine tool drive, and the drive rod 7 pulls the transmission column 5. The arc groove 8 of the transmission column 5 drives the first transmission balls 9 of the two transmission connecting rods 6 to move downward and rotate. The two transmission connecting rods 6 rotate around the limit axis 12, and synchronously move and rotate close to each other in the spherical grooves 11 of the two jaws 2 through the two second transmission balls 10, drive the two jaws 2 to approach each other, drive the two workpiece clamps 3 to approach each other, and clamp the workpiece for subsequent processing.

[0019] Preferably, the end of the driving rod 7 away from the transmission column 5 is connected to the machine tool pull rod drive. The driving rod 7 is pulled by the machine tool pull rod, and the side of the chuck body 1 away from the claw 2 is fixedly connected to the machine tool.

[0020] In order to facilitate the movement of the two claws 2 on the chuck body 1, as an improvement of the technical solution, a protrusion / groove track 13 connecting the claws 2 is opened on the side of the chuck body 1 connected to the claws 2, and the two claws 2 are provided with a groove / protrusion structure 14 that slides and matches with the protrusion / groove track 13.

[0021] When the claw displacement driving assembly drives the claws 2 to move, the groove / protrusion structures 14 on the two claws 2 move along the protrusion / groove track 13, driving the two claws 2 to move closer to or away from each other.

[0022] As a specific implementation method of the positioning and locking structure, the positioning and locking structure includes a positioning plate 15 and a locking structure. A positioning square 16 is provided at the end of the clamp block connecting shaft 4 away from the clamp block connecting end, and a square hole matching the positioning square 16 is provided on the positioning plate 15; the locking structure includes a locking block 17, a locking bolt 18 and a fixing clamp 19. The locking block 17 is slidably connected to the claw 2 in a direction that can approach or move away from the positioning plate 15. The fixing clamp 19 is fixedly clamped on the claw 2. The locking bolt 18 is threadedly connected to the fixing clamp 19. The locking bolt 18 is rotated to make the locking block 17 support or release the positioning plate 15.

[0023] When positioning and locking are required, the workpiece and the clamping block connecting shaft 4 are rotated according to the target angle. After they are in place, the selected positioning piece 15 is installed on the positioning square 16, and the locking bolt 18 is rotated. The locking bolt 18 pushes the locking block 17, and the locking block 17 moves on the claw 2 until it presses against the positioning piece 15, thus achieving positioning and locking. When loosening is required, the locking bolt 18 is rotated in the opposite direction, the locking block 17 is in a relaxed state, and the positioning piece 15 is loosened to change the angle.

[0024] In order to adapt to the processing angles of different workpieces, as an improvement of the technical solution, the positioning piece 15 is a circular piece with a number of corresponding cross-sections arranged on the periphery according to the processing angles of the workpiece, and the locking block 17 supports the corresponding cross-sections when locking.

[0025] In order to achieve precise clamping of the workpiece, as an improvement of the technical solution, the clamping structure of the workpiece clamping block 3 is a contoured structure processed according to the digital model of the workpiece.

Claims

1. A two-jaw chuck for conveniently adjusting the processing angle of a workpiece, characterized in that: The invention comprises a chuck body (1), a clamping jaw (2) and a workpiece clamping block (3); a cavity is provided inside the chuck body (1); a clamping jaw displacement driving assembly is provided in the cavity of the chuck body (1); two clamping jaws (2) are relatively connected to the upper surface of the chuck body (1); one end of the two clamping jaws (2) close to the chuck body (1) is connected to the clamping jaw displacement driving assembly; the clamping jaw displacement driving assembly can make the two clamping jaws (2) approach each other or move away from each other by a certain distance on the chuck body (1); one end of the two clamping jaws (2) away from the chuck body (1) is rotatably connected to a clamping block connecting shaft (4); the ends of the two clamping block connecting shafts (4) close to each other are clamping block connecting ends; the other end of at least one clamping block connecting shaft (4) can be positioned and locked by a positioning and locking structure; the sides of the two workpiece clamping blocks (3) close to each other are provided with a clamping structure matching the shape of the workpiece; The clamping claw displacement drive assembly comprises a transmission column (5) and two transmission connecting rods (6), one end of the transmission column (5) away from the clamping claw (2) is connected to the driving rod (7), the outer wall of the transmission column (5) is provided with a circle of arc surface grooves (8), the side of the chuck body (1) away from the clamping claw (2) is provided with a hole for the transmission column (5) to movably pass through, the sides of the two clamping claws (2) close to the chuck body (1) are provided with spherical grooves (11), one end of the two transmission connecting rods (6) is provided with a first transmission ball (9), and the other end is provided with a second transmission ball (10), the two first transmission balls (9) are matched in the arc surface groove of the transmission column (5), the two second transmission balls (10) are matched in the two spherical grooves (11), and the central positions of the two transmission connecting rods (6) are rotatably connected to the inner wall of the chuck body (1) through a limit shaft (12), and the end of the driving rod (7) away from the transmission column (5) is connected to the machine tool drive; The positioning and locking structure comprises a positioning sheet (15) and a locking structure. A positioning square (16) is provided at one end of the clamp block connecting shaft (4) away from the clamp block connecting end. The positioning sheet (15) is provided with a square hole matching the positioning square (16). The locking structure comprises a locking block (17), a locking bolt (18) and a fixing clamp (19). The locking block (17) is slidably connected to the clamping claw (2) in a direction that allows it to approach or move away from the positioning sheet (15). The fixing clamp (19) is fixedly clamped on the clamping claw (2). The locking bolt (18) is threadedly connected to the fixing clamp (19). The locking block (17) is pressed against or released from the positioning sheet (15) by the rotation of the locking bolt (18).

2. The two-jaw chuck for conveniently adjusting the workpiece processing angle according to claim 1 is characterized in that: One end of the driving rod (7) away from the transmission column (5) is connected to a machine tool pull rod drive.

3. The two-jaw chuck for conveniently adjusting the workpiece processing angle according to claim 1 is characterized in that: A protrusion / groove track (13) for connecting the clamping claw (2) is provided on one side of the chuck body (1) connected to the clamping claw (2), and a groove / protrusion structure (14) for slidingly matching with the protrusion / groove track (13) is provided on the two clamping claws (2).

4. The two-jaw chuck for conveniently adjusting the workpiece processing angle according to claim 1 is characterized in that: The positioning piece (15) is a circular piece having a plurality of corresponding cross-sections arranged on the outer circumference according to the processing angle of the workpiece, and the locking block (17) presses against the corresponding cross-sections when locking.

5. The two-jaw chuck for conveniently adjusting the workpiece processing angle according to claim 1 is characterized in that: The clamping structure of the workpiece clamping block (3) is a contoured structure machined according to a digital model of the workpiece.

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