A fixture for numerical control cutting

Abstract

The utility model discloses a kind of clamps for numerical control cutting, including rack, cutting chamber is formed in rack inside, cutting device and clamp are installed in cutting chamber, clamp is used to hold section bar with arc configuration, cutting device is used to cut section bar held by clamp;Clamp includes workbench and chuck, workbench is installed in cutting chamber bottom, chuck is connected with workbench, chuck includes first clamping arm and second clamping arm, first clamping arm and second clamping arm can be relatively moved, when first clamping arm and second clamping arm are opposite movement, when first clamping arm and second clamping arm are opposite movement, section bar can be put into clamping groove, when first clamping arm and second clamping arm, section bar can be clamped tightly;First clamping arm and second clamping arm constitute an open clamping groove to the up, to cope with the cutting device of up and down movement with vertical opening clamping groove, stress direction is forward relative, and stress is concentrated, so that it is not easy to occur deformation, simultaneously can improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of CNC device technology, and more specifically, to a fixture for CNC cutting. Background Technology

[0002] In the field of CNC cutting, for the processing of profiles with curved structures (such as automotive crash beams), the design and performance of the fixtures play a crucial role in cutting accuracy and product quality.

[0003] Existing fixtures for CNC cutting typically include a frame, with a cutting chamber inside the frame housing the cutting device and the fixture. The fixture generally consists of a worktable and a chuck. The worktable is mounted at the bottom of the cutting chamber, and the chuck is connected to the worktable. The chuck usually has two gripping arms, forming a horizontally opening gripping groove. The cutting device cuts the profile held in the gripping groove from above, moving vertically downwards.

[0004] However, this traditional construction method has many drawbacks. Because the profiles are generally longer than they are wide (i.e., quite long), when the profiles are fixed using a horizontal clamping method and then cut vertically, the forces acting on the profiles are orthogonal in direction. This stress condition easily leads to deformation of the profiles in the vertical direction, severely affecting cutting accuracy and product quality.

[0005] Specifically, during the cutting process, the profile is subjected to downward pressure from the cutting device, and the lateral clamping method of the fixture cannot effectively disperse this pressure, causing the profile to bear greater stress in the vertical direction, resulting in deformation. This deformation not only leads to inaccurate cutting dimensions but may also cause quality problems in subsequent processing and use of the profile, increasing the scrap rate and raising production costs. Utility Model Content

[0006] To address the aforementioned defects and shortcomings, this invention improves the opening direction of the clamping groove to enhance the cutting pass rate and production efficiency. Based on this, a fixture for CNC cutting is provided.

[0007] To achieve the above objectives, the specific technical solution adopted by this utility model is as follows:

[0008] The present invention discloses a fixture for CNC cutting, comprising a frame, wherein a cutting chamber is formed inside the frame, and a cutting device and a fixture are installed inside the cutting chamber. The fixture is used to clamp a profile with an arc-shaped structure, and the cutting device is used to cut the profile clamped by the fixture.

[0009] The fixture includes a worktable and a chuck. The worktable is installed at the bottom of the cutting chamber, and the chuck is connected to the worktable. The chuck includes a first clamping arm and a second clamping arm. The first clamping arm and the second clamping arm can move relative to each other. When the first clamping arm and the second clamping arm move in opposite directions, the profile can be placed in the clamping slot. When the first clamping arm and the second clamping arm move towards each other, the profile can be clamped.

[0010] The first clamping arm and the second clamping arm form an upward-opening clamping groove. The vertically open clamping groove is designed to handle the vertically moving cutting device. The forces are directed in opposite directions and are concentrated, making it less prone to deformation and improving production efficiency.

[0011] Preferably, a support structure is provided at the center of the workbench, and the height of the support structure is slightly lower than the bottom height of the clamping groove.

[0012] Preferably, the chuck is telescopically connected to the worktable, and the worktable is provided with a guide structure, the guide structure including a limiting groove and a limiting rod, the limiting rod being fitted into the limiting groove, and one end of the limiting rod being connected to the chuck for guiding the direction when the chuck is telescopically moving.

[0013] Preferably, one end of the limiting rod is configured in a hook shape, with its bottom abutting against the worktable surface to prevent the limiting rod from disengaging from the limiting groove and to ensure operational stability.

[0014] Preferably, the chuck and the worktable are telescopically connected via a CNC control system.

[0015] Preferably, the first clamping arm and / or the second clamping arm are provided with clamping blocks, and the ends of the clamping blocks are configured as arc-shaped curved walls.

[0016] Preferably, the chuck further includes a mounting plate, the first clamping arm is fixedly connected to the mounting plate, and the second clamping arm is slidably connected to the mounting plate to realize relative movement between the first clamping arm and the second clamping arm.

[0017] Preferably, the second clamping arm is connected to the mounting plate via a clamping power device.

[0018] Preferably, the clamping power device is configured as a cylinder, a hydraulic cylinder, or a motor.

[0019] Preferably, the workbench is connected to the frame via a movable guide rail.

[0020] Compared with the prior art, this utility model has the following advantages:

[0021] The fixture of this invention employs a vertically open clamping groove, which cooperates with the cutting device that moves up and down, ensuring that the force on the profile is directed in opposite directions. Compared to the traditional horizontal clamping and vertical cutting, which results in orthogonal force that easily causes vertical deformation of the profile, this application distributes the possible deformation locations along the narrower width of the profile, and this portion is firmly clamped by the clamping arms, effectively preventing deformation of the profile during the cutting process and significantly improving production accuracy and product quality.

[0022] The vertically open clamping slot design facilitates the placement and removal of profiles. Unlike traditional horizontally open clamping slots, operators do not need to operate from the side in confined space. Profiles can be placed or removed from the clamping slot more easily, which is especially suitable for longer or more complex curved profiles. This greatly reduces the placement and removal time and improves overall production efficiency.

[0023] The present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the internal structure of the cutting chamber in a preferred embodiment of the present invention.

[0025] Figure 2 for Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0026] Figure 3 for Figure 1 A magnified schematic diagram of the structure at point B in the middle.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10 racks

[0029] 20 Cutting device, 21 Saw blade,

[0030] 30 clamps

[0031] 31 Workbench, 312 Limiting groove, 313 Limiting rod, 314 Support structure,

[0032] 32. Chuck, 321. First clamping arm, 322. Second clamping arm, 323. Clamping slot, 324. Mounting plate, 325. Clamping power unit, 326. Clamping block, 327. Telescopic rod.

[0033] 33. Moving guide rail. Detailed Implementation

[0034] The present invention will be further explained and described below through specific embodiments. It should be understood that the purpose of the following embodiments is to make the technical solution of the present invention clearer and easier to understand, and does not limit the scope of protection of the claims.

[0035] The present invention will be further described below through specific embodiments.

[0036] Example

[0037] This embodiment provides a fixture for CNC cutting, including a frame 10, with a cutting chamber formed inside the frame 10. A cutting device 20 and a fixture 30 are installed inside the cutting chamber. The fixture 30 is used to clamp profiles with arc-shaped structures, such as automotive anti-collision beams. The cutting device 20 is used to cut the profiles clamped by the fixture 30. The fixture 30 includes a worktable 31 and a chuck 32. The worktable 31 is installed at the bottom of the cutting chamber, and the chuck 32 is connected to the worktable 31. The chuck 32 includes a first clamping arm 321 and a second clamping arm 322. The first clamping arm 321 and the second clamping arm 322 form an upward-opening clamping groove 323. The first clamping arm 321 and the second clamping arm 322 can move relative to each other. When the first clamping arm 321 and the second clamping arm 322 move in opposite directions, the profile can be placed in the clamping groove 323. When the first clamping arm 321 and the second clamping arm 322 move towards each other, the profile can be clamped.

[0038] In the prior art, the opening of the clamping groove 323 is horizontal, and the cutting device 20 cuts the profile from top to bottom. The drawback of this structure is that it easily causes the profile to deform. This is because the profile is generally longer than its width, i.e., it is relatively long. When the profile is clamped horizontally and then cut vertically, the force direction is orthogonal, which makes the profile prone to deformation in the vertical direction.

[0039] In this application, the vertically open clamping groove 323 is used to handle the cutting device 20 that moves vertically. The forces are directed in opposite directions, and the possible deformation points are distributed along the width of the profile. The narrower parts of the profile are less prone to deformation. Furthermore, this part is held securely by the clamping arm, further ensuring that deformation does not occur during the cutting process, thus improving production accuracy and quality. At the same time, the vertically open clamping groove 323 facilitates the loading and unloading of the profile, which has the beneficial effect of improving production efficiency.

[0040] Specifically, the chuck 32 further includes a mounting plate 324, the first clamping arm 321 is fixedly connected to the mounting plate 324, and the second clamping arm 322 is slidably connected to the mounting plate 324 to realize the relative movement of the first clamping arm 321 and the second clamping arm 322.

[0041] Specifically, the second clamping arm 322 is connected to the mounting plate 324 via the clamping power device 325.

[0042] More specifically, the clamping power device 325 can be a pneumatic cylinder, a hydraulic cylinder, or other power structures such as an electric motor. Any conventional power device that can drive the second clamping arm 322 to slide on the mounting plate 324 can be used.

[0043] Specifically, the first clamping arm 321 and the second clamping arm 322 are both provided with clamping blocks 326, and the ends of the clamping blocks 326 are set as arc-shaped curved walls; because the profiles are arc-shaped and also have different models, and different models of profiles have different local bending curvatures, in order to adapt to this arc-shaped area, curved walls are set to better fit and ensure clamping strength.

[0044] In addition, if the clamping force is large enough, one clamping block 326 can be reduced. That is, the clamping block 326 can be provided only on the first clamping arm 321 or only on the second clamping arm 322. The most preferred way is to provide clamping blocks 326 on both the first clamping arm 321 and the second clamping arm 322.

[0045] Specifically, the clamp 32 is telescopically connected to the worktable 31. In this embodiment, the mounting plate 324 is telescopically connected to the worktable 31 via a telescopic rod 327. The telescopic rod 327 is connected to a telescopic power device installed inside the worktable 31. The telescopic power device can be a cylinder, a hydraulic cylinder, or a motor or other power structure. Any conventional power device that can drive the telescopic rod 327 to telescopic movement can be used.

[0046] Specifically, the telescopic rod 327 is also connected to a CNC control system, which enables the automated operation of the device. It should be noted that the CNC control system can be any general CNC control system, that is, the telescopic rod 327 can be used with a general CNC control system.

[0047] Specifically, the workbench 31 is provided with a guide structure, which includes a limiting groove 312 and a limiting rod 313. The limiting rod 313 is fitted into the limiting groove 312, and one end of the limiting rod 313 is connected to the chuck 32 to guide the direction when the chuck 32 is in telescopic motion.

[0048] Specifically, one end of the limiting rod 313 is configured in a hook shape, with its bottom abutting against the surface of the worktable 31 to prevent the limiting rod 313 from disengaging from the limiting groove 312 and to ensure the stability of operation.

[0049] Specifically, a support structure 314 is provided at the center of the workbench 31. The height of the support structure 314 is slightly lower than the bottom height of the clamping groove 323, which is 1.2 mm lower in this embodiment. When feeding, the profile is placed into the clamping groove 323. The profile not only contacts the bottom of the clamping groove 323, but also naturally sits on the support structure 314 under the action of gravity. When clamping, the profile separates from the support structure 314. When cutting, the support structure 314 can prevent the profile from deviating significantly due to the pressure of the cutting device 20. Therefore, the support structure 314 has a limiting function and has different limiting performance in different states.

[0050] Specifically, the support structure 314 includes a horizontal bar and two vertical bars, forming a gate-shaped structure.

[0051] Specifically, the worktable 31 is connected to the frame 10 via a movable guide rail 33, which is used to realize the forward and backward movement of the entire worktable 31.

[0052] Specifically, the cutting device 20 includes a saw blade 21 and a moving mechanism. The saw blade 21 is connected to the moving mechanism, which is mounted on the frame 10. Driven by the moving mechanism, the saw blade 21 can be moved up and down to cut the profile.

[0053] This utility model has been described through embodiments, but it does not constitute a limitation on this utility model. Other variations of the disclosed embodiments, which are readily apparent to those skilled in the art, should fall within the scope of the claims of this utility model, with reference to the description of this utility model.

Claims

1. A fixture for CNC cutting, characterized in that: Includes a frame (10), inside which a cutting chamber is formed, and a cutting device (20) and a clamp (30) are installed in the cutting chamber. The clamp (30) is used to clamp a profile with an arc-shaped structure, and the cutting device (20) is used to cut the profile clamped by the clamp (30). The clamp (30) includes a worktable (31) and a chuck (32). The worktable (31) is installed at the bottom of the cutting chamber. The chuck (32) is connected to the worktable (31). The chuck (32) includes a first clamping arm (321) and a second clamping arm (322). The first clamping arm (321) and the second clamping arm (322) can move relative to each other. When the first clamping arm (321) and the second clamping arm (322) move in opposite directions, the profile can be placed in the clamping groove (323). When the first clamping arm (321) and the second clamping arm (322) move towards each other, the profile can be clamped. The first clamping arm (321) and the second clamping arm (322) form an upward-opening clamping groove (323). The vertically open clamping groove (323) is used to deal with the vertically moving cutting device (20). The forces are opposite to each other and the forces are concentrated, so that deformation is not easy to occur, and production efficiency can be improved.

2. The fixture for CNC cutting according to claim 1, characterized in that: The workbench (31) has a support structure (314) at its center, and the height of the support structure (314) is slightly lower than the bottom height of the clamping groove (323).

3. The fixture for CNC cutting according to claim 1, characterized in that: The chuck (32) is telescopically connected to the worktable (31). The worktable (31) is provided with a guide structure, which includes a limiting groove (312) and a limiting rod (313). The limiting rod (313) is fitted into the limiting groove (312), and one end of the limiting rod (313) is connected to the chuck (32) to guide the direction of the chuck (32) when it is telescopically moving.

4. The fixture for CNC cutting according to claim 3, characterized in that: One end of the limiting rod (313) is configured in a hook shape, with its bottom abutting against the worktable (31) surface to prevent the limiting rod (313) from disengaging from the limiting groove (312) and to ensure the stability of operation.

5. The fixture for CNC cutting according to claim 1, characterized in that: The chuck (32) and the worktable (31) are retractably connected via a CNC control system.

6. The fixture for CNC cutting according to claim 1, characterized in that: The first clamping arm (321) and / or the second clamping arm (322) are provided with clamping blocks (326), and the ends of the clamping blocks (326) are provided as arc-shaped curved walls.

7. The fixture for CNC cutting according to claim 1, characterized in that: The clamp (32) also includes a mounting plate (324), the first clamping arm (321) is fixedly connected to the mounting plate (324), and the second clamping arm (322) is slidably connected to the mounting plate (324) to realize the relative movement of the first clamping arm (321) and the second clamping arm (322).

8. The fixture for CNC cutting according to claim 7, characterized in that: The second clamping arm (322) is connected to the mounting plate (324) via a clamping power device (325).

9. The fixture for CNC cutting according to claim 8, characterized in that: The clamping power device (325) is configured as a cylinder, a hydraulic cylinder, or a motor.

10. The fixture for CNC cutting according to claim 1, characterized in that: The workbench (31) is connected to the frame (10) via a movable guide rail (33).

Images