Adjustable clamp for machining of numerical control machine tool

Abstract

The utility model discloses an adjustable clamp for numerical control machine tool machining, which comprises a numerical control machine tool main body, a spindle box is arranged in the numerical control machine tool main body, the spindle box is suitable for driving the adjustable clamp to rotate, and the adjustable clamp comprises two movable protective shells. A retractable clamping block and a rotatable side clamping plate are arranged in the protective shell, the clamping block is suitable for driving the side clamping plate to be adjusted synchronously, a workpiece can be fixed in a multi-point mode, and an auxiliary component is pushed in a two-point clamping mode to conduct self-adaptive adjustment and clamping on the two sides of the workpiece at the same time. And the use flexibility and stability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tool fixtures, and specifically, to an adjustable fixture for numerical control machine tool processing. Background Art

[0002] At present, in the field of numerical control machine tool processing, the precise clamping of shaft parts is a key link to ensure processing accuracy, improve production efficiency and ensure safety. However, in the prior art, traditional clamping methods for shaft parts, such as three-jaw chucks and V-shaped clamping blocks, all have significant limitations and cannot meet the growing processing requirements.

[0003] After retrieval, it is found that the Chinese utility model patent with the publication number CN212385037U discloses an adjustable fixture for numerical control machine tool processing. However, this patent realizes the cooling function through a water tank, a water pump and atomizing nozzles, and internally has a clamping mechanism composed of a telescopic spring, a connecting block, a locking plate and fastening bolts. This design allows for quick adaptation to workpieces of different sizes, eliminates the need for frequent fixture replacement, saves time and effort, and at the same time ensures the stable clamping of the workpiece to prevent it from falling during processing. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to overcome the defects in the prior art. By means of two-point clamping, the auxiliary components are driven to adaptively adjust and clamp both sides of the workpiece simultaneously, improving the flexibility and stability of use.

[0005] To solve the above technical problem, the technical solution of the utility model is an adjustable fixture for numerical control machine tool processing, including a numerical control machine tool main body. A spindle box is arranged in the numerical control machine tool main body, and the spindle box is adapted to drive the adjustable fixture to rotate. The adjustable fixture includes two movable protective shells. A retractable clamping block and a rotatable side clamping plate are arranged inside the protective shell. The clamping block is adapted to drive the side clamping plate to adjust synchronously, and can fix the workpiece at multiple points.

[0006] Furthermore, the adjustable fixture includes a housing. A straight groove is opened inside the housing. A bidirectional screw rod I is rotatably installed inside the straight groove. Two opposite threads are arranged on the bidirectional screw rod I. Two moving plates are respectively assembled on the two opposite threads through ball nuts. The protective shell is fixedly connected to the corresponding moving plate. An adjustment opening is opened on the outer peripheral surface of the housing, and the adjustment opening is communicated with the inside of the straight groove, and the bidirectional screw rod I can be driven to rotate through the adjustment opening.

[0007] Further, a guide rail is fixedly connected to the inner wall of the protective shell, the clamping block is slidably connected to the inside of the guide rail, a telescopic rod is fixedly connected to the protective shell, the telescopic end of the telescopic rod extends into the inside of the telescopic rod and is fixedly connected to the top of the clamping block, a damping spring is arranged outside the telescopic rod, and two ends of the damping spring are respectively connected to the inner wall of the protective shell and the top of the clamping block. The clamping block is adapted to perform shrinkage adjustment according to the size of the workpiece to be clamped.

[0008] Further, racks are fixedly connected to both sides of the clamping block, two gears are rotatably installed inside the protective shell, the gears and the racks correspond to each other, a side clamping plate is fixedly connected to one end of the gear, and the side clamping plate rotates and adjusts while the clamping block shrinks to perform multi-point fixation on the workpiece.

[0009] Further, a slide rail is arranged inside the main body of the numerical control machine tool, a tool rest and a tailstock are respectively slidably connected to the slide rail, and a protective component is arranged on one side of the tool rest.

[0010] Further, the protective component includes two movable limiting plates, a plurality of rollable balls are arranged on the limiting plates, and the two limiting plates are movably adjusted to contact the surface of the long workpiece to prevent the workpiece from flying out.

[0011] Further, the protective component further includes a fixing plate, a transverse groove is formed inside the fixing plate, a two-way screw rod two is rotatably installed inside the transverse groove, a handle is rotatably installed on one side of the fixing plate, the handle can drive the two-way screw rod two to rotate, two transmission sleeves that can move towards each other are assembled on the outside of the two-way screw through ball nuts, and the two limiting plates are respectively fixedly connected to the two transmission sleeves.

[0012] Further, the transmission sleeve is of a telescopic type and is fixed by bolts.

[0013] Adopting the above technical solutions, the utility model has the following beneficial effects:

[0014] 1. The two protective shells can move towards each other driven by the two-way screw rod one. When moving to the position where the clamping block contacts the workpiece and continues to move, the shrinkage of the clamping block will drive the rotation of the two side clamping plates. When the two side clamping plates rotate to contact the surface of the workpiece, self-locking is completed, realizing the function of multi-point adaptive adjustment and clamping.

[0015] 2. When processing long shaft-like parts, the two limiting plates are moved by rotating the two-way screw rod two. When moving to the position where the balls contact the surface of the workpiece, it plays a limiting role when contacting, preventing the workpiece from jumping by itself and also avoiding the long workpiece flying out and hurting people during processing. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is a schematic diagram of the overall adjustable fixture of the present utility model;

[0018] Figure 3 is a schematic diagram of the moving structure of the protective shell of the present utility model;

[0019] Figure 4 is a schematic diagram of the internal structure of the protective shell of the present utility model;

[0020] Figure 5 is a schematic diagram of the structure of the protection component of the present utility model.

[0021] In the figure: 1, the main body of the numerical control machine tool; 2, the spindle box; 3, the slide rail; 4, the tailstock; 5, the tool rest;

[0022] 6, the adjustable fixture; 601, the outer shell; 602, the adjustment port; 603, the first bidirectional screw; 604, the moving plate; 605, the protective shell; 606, the clamping block; 607, the telescopic rod; 608, the damping spring; 609, the guide rail; 610, the rack; 611, the gear; 612, the side clamping plate;

[0023] 7, the protection component; 701, the fixed plate; 702, the handle; 703, the second bidirectional screw; 704, the transmission sleeve; 705, the limit plate; 706, the ball. Specific embodiments

[0024] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments and in conjunction with the accompanying drawings.

[0025] Embodiment 1

[0026] As Figure 1 shown, an adjustable fixture for numerical control machine tool machining includes the main body 1 of the numerical control machine tool. A spindle box 2 is arranged in the main body 1 of the numerical control machine tool. The spindle box 2 is adapted to drive the adjustable fixture 6 to rotate. The adjustable fixture 6 includes two movable protective shells 605. A retractable clamping block 606 and a rotatable side clamping plate 612 are arranged inside the protective shell 605. The clamping block 606 is adapted to drive the side clamping plate 612 to adjust synchronously, and can fix the workpiece at multiple points.

[0027] As Figure 2As shown, the adjustable fixture 6 includes a housing 601. A straight groove is formed inside the housing 601. A first bidirectional screw 603 is rotatably installed inside the straight groove. Two opposite threads are provided on the first bidirectional screw 603. Moving plates 604 are respectively assembled on the two opposite threads through ball nuts. A protective shell 605 is fixedly connected to the corresponding moving plate 604. An adjustment opening 602 is formed on the outer peripheral surface of the housing 601. The adjustment opening 602 communicates with the inside of the straight groove, and the first bidirectional screw 603 can be driven to rotate through the adjustment opening 602.

[0028] As Figure 1 As shown, a guide rail 609 is fixedly connected to the inner wall of the protective shell 605. A clamping block 606 is slidably connected inside the guide rail 609. A telescopic rod 607 is fixedly connected to the protective shell 605. The telescopic end of the telescopic rod 607 extends into the inside of the telescopic rod 607 and is fixedly connected to the top of the clamping block 606. A damping spring 608 is arranged outside the telescopic rod 607. Two ends of the damping spring 608 are respectively connected to the inner wall of the protective shell 605 and the top of the clamping block 606. The clamping block 606 is adapted to perform contraction adjustment according to the size of the workpiece to be clamped.

[0029] As Figure 1 As shown, racks 610 are fixedly connected to both sides of the clamping block 606. Two gears 611 are rotatably installed inside the protective shell 605. The gears 611 and the racks 610 correspond to each other. A side clamping plate 612 is fixedly connected to one end of the gear 611. The side clamping plate 612 rotates and adjusts while the clamping block 606 contracts, and performs multi-point fixation on the workpiece.

[0030] The working principle of this embodiment is as follows: When machining shaft parts, the workpiece is placed between the two protective shells 605. The chuck wrench is inserted into the adjustment opening 602 and rotated to drive the rotation of the first bidirectional screw 603, so as to realize the relative movement of the two protective shells 605 and clamp the workpiece during the movement.

[0031] During the clamping process, the two clamping blocks 606 first come into contact with the workpiece. After the contact, the first bidirectional screw 603 continues to rotate. At this time, the clamping block 606 drives the damping spring 608 and the telescopic rod 607 to contract after being squeezed. During the contraction process, the clamping block 606 moves inside the guide rail 609, thereby improving the stability of its movement.

[0032] While the clamping block 606 moves, it will drive the racks 610 on both sides to move together. As the position of the racks 610 changes, they mesh with the gear 611, thus realizing the rotation of the gear 611 and the side clamping plate 612. When the side clamping plate 612 rotates to contact the surface of the workpiece, the gear 611 cannot continue to rotate. At this time, the clamping block 606 also cannot continue to move, and the bidirectional screw one 603 cannot rotate either. In this case, the unilateral three-point fixation of the workpiece is completed. Since there are two sets of identical protective cases 605, the overall six-point fixation of the workpiece can be achieved, realizing a more stable fixation effect, making the quality of workpiece processing better and more secure.

[0033] At the same time, this setting can achieve a good effect of adaptive adjustment. The operator only needs to rotate the bidirectional screw one 603, and the rest can be adjusted by itself to achieve the final clamping and fixation of the workpiece.

[0034] Embodiment 2

[0035] As Figure 1 shown, on the basis of Embodiment 1, this embodiment further includes the following mechanism: A slide rail 3 is arranged inside the main body 1 of the numerical control machine tool. A tool rest 5 and a tailstock 4 are respectively slidably connected to the slide rail 3. A protective component 7 is arranged on one side of the tool rest 5.

[0036] As Figure 1 shown, the protective component 7 includes two movable limiting plates 705. A number of rolling balls 706 are arranged on the limiting plates 705. After the two limiting plates 705 are movably adjusted, they contact the surface of the long workpiece to prevent the workpiece from flying out.

[0037] As Figure 1 shown, the protective component 7 further includes a fixing plate 701. A transverse groove is opened inside the fixing plate 701. A bidirectional screw two 703 is rotatably installed inside the transverse groove. A handle 702 is rotatably installed on one side of the fixing plate 701. The handle 702 can drive the bidirectional screw two 703 to rotate. Two transmission sleeves 704 that can move towards each other are assembled on the outside of the bidirectional screw through ball nuts. The two limiting plates 705 are respectively fixedly connected to the two transmission sleeves 704.

[0038] As Figure 1 shown, the transmission sleeve 704 is of a telescopic type and is fixed by bolts.

[0039] The working principle of this embodiment is as follows: When machining a long shaft-like part on a numerical control machine tool, it is necessary to drive the center point by the tailstock 4 to fix the other end of the workpiece. In this case, the stability during the machining of the long workpiece can be improved, but there will also be a safety hazard of the workpiece flying out.

[0040] Therefore, by rotating the handle 702, the rotation of the double screw rod two 703 is driven. When the double screw rod two 703 rotates, the two limit plates 705 move towards each other. The limit plates 705 can move to make the balls 706 on them contact the surface of the workpiece to achieve slight clamping. Due to the adoption of the balls 706, no scratches will be produced on the surface of the workpiece while the workpiece is rotating. At the same time, the protective plate can effectively play a role in limiting the position, avoiding the phenomenon of jumping of the long workpiece during the processing, and can also play a protective role immediately when the workpiece flies out.

[0041] And the protection component 7 is arranged on one side of the tool rest 5 and can move synchronously with the tool rest 5 during processing, so as to ensure the stability of the position being processed and improve the processing quality.

[0042] At the same time, the transmission sleeve 704 for fixing the limit plate 705 is set to be telescopic and can be adjusted according to parts of different sizes.

[0043] The specific embodiments described above further elaborate on the technical problems solved, technical solutions and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjustable fixture for CNC machine tool processing, comprising a CNC machine tool body (1), wherein a spindle box (2) is arranged in the CNC machine tool body (1), and the spindle box (2) is suitable for driving an adjustable fixture (6) to rotate, characterized in that: The adjustable clamp (6) comprises two movable protective shells (605), wherein a retractable clamping block (606) and a rotatable side clamping plate (612) are arranged inside the protective shell (605), and the clamping block (606) is suitable for driving the side clamping plate (612) to adjust synchronously, so that the workpiece can be fixed at multiple points.

2. The adjustable fixture for CNC machine tool processing according to claim 1, characterized in that: The adjustable clamp (6) comprises a shell (601), a straight groove is provided inside the shell (601), a bidirectional screw rod (603) is rotatably installed inside the straight groove, two opposite threads are provided on the bidirectional screw rod (603), and movable plates (604) are respectively assembled on the two opposite threads through ball nuts, and the protective shell (605) is fixedly connected to the corresponding movable plates (604), and an adjustment port (602) is provided on the outer peripheral surface of the shell (601), and the adjustment port (602) is communicated with the inside of the straight groove, and the bidirectional screw rod (603) can be driven to rotate through the adjustment port (602).

3. The adjustable fixture for CNC machine tool processing according to claim 1 is characterized in that: A guide rail (609) is fixedly connected to the inner wall of the protective shell (605), and the clamping block (606) is slidably connected to the inside of the guide rail (609). A telescopic rod (607) is fixedly connected to the protective shell (605), and the telescopic end of the telescopic rod (607) extends into the inside of the telescopic rod (607) and is fixedly connected to the top of the clamping block (606). A damping spring (608) is arranged on the outside of the telescopic rod (607), and the two ends of the damping spring (608) are respectively connected to the inner wall of the protective shell (605) and the top of the clamping block (606), and the clamping block (606) is suitable for contraction and adjustment according to the size of the clamped workpiece.

4. The adjustable fixture for CNC machine tool processing according to claim 3 is characterized in that: Racks (610) are fixedly connected to both sides of the clamping block (606), and two gears (611) are rotatably installed inside the protective shell (605). The gears (611) and the racks (610) correspond to each other. One end of the gear (611) is fixedly connected to a side clamping plate (612), and the side clamping plate (612) is rotated and adjusted while the clamping block (606) is contracted, so as to fix the workpiece at multiple points.

5. The adjustable fixture for CNC machine tool processing according to claim 1, characterized in that: A slide rail (3) is arranged inside the CNC machine tool body (1), a tool holder (5) and a tailstock (4) are slidably connected to the slide rail (3), and a protective component (7) is arranged on one side of the tool holder (5).

6. The adjustable fixture for CNC machine tool processing according to claim 5, characterized in that: The protection component (7) comprises two movable limiting plates (705), on which a plurality of rolling balls (706) are arranged. The two limiting plates (705) can be moved and adjusted to contact the surface of the long workpiece to prevent the workpiece from flying out.

7. The adjustable fixture for CNC machine tool processing according to claim 6, characterized in that: The protection component (7) also includes a fixing plate (701), the fixing plate (701) has a transverse groove inside, a bidirectional screw rod (703) is rotatably installed inside the transverse groove, a handle (702) is rotatably installed on one side of the fixing plate (701), the handle (702) can drive the bidirectional screw rod (703) to rotate, the outside of the bidirectional screw rod is equipped with two transmission sleeves (704) that can move towards each other through ball nuts, and the two limit plates (705) are respectively fixedly connected to the two transmission sleeves (704).

8. The adjustable fixture for CNC machine tool processing according to claim 7, characterized in that: The transmission sleeve (704) is retractable and fixed with bolts.

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