CNC machining jig

Abstract

The utility model discloses a kind of CNC machining jigs, for the clamping of part, comprising: bottom plate and substrate, part includes the arc cover plate of inclined arrangement, the edge of arc cover plate front part has a downwardly extending side plate, to form a shell cavity between the side plate and arc cover plate, the lower end of side plate is formed with a horizontally outwardly extending flange strip;The upper surface of a carrier plate installed on the upper surface of substrate is provided with several profiled pads and support pads, the upper surface of substrate and located outside support pad are provided with mounting through hole, a spinning cylinder is arranged in each mounting through hole, the upper end of the piston rod of spinning cylinder and located above substrate and install a rocker arm.The utility model CNC machining jig can realize the stable support of special-shaped part to avoid damage to the part during processing, and can improve the stability of the part pressure holding positioning while realizing the quick loading and unloading of the part.

Description

Technical Field

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

[0002] CNC is short for Computer Numerical Control, referring to a type of automated numerical control machine tool controlled by a program. The CNC control system can logically process programs with control codes or other symbolic instructions, decode them, represent them with coded numbers, input them to the CNC device via an information carrier, and then the CNC device sends control signals to control the machine tool's movements to machine the parts. The assembly of CNC machining fixtures plays a crucial role in enabling CNC machining of irregularly shaped parts.

[0003] A search revealed that patent CN117564779A discloses a CNC machining fixture, including a worktable, a movable seat mounted on the worktable, a vertex clamping block, a push-pull plate, clamping rods, and an arc-shaped groove with serrations at one end of the clamping rods. A telescopic cylinder controls the movable seat to move closer to a fixed seat, causing the push-pull plate to move horizontally on the inner surface of the fixed seat, thus causing the two sets of clamping rods to deflect towards the central axis of the worktable with their connection point to the push-pull rod as the center of rotation. This, combined with the vertex clamping block, clamps and positions irregularly shaped workpieces in three directions. During clamping, the arc-shaped groove and serrations remain in contact with the surface of the irregularly shaped workpiece. However, while this patent can clamp irregularly shaped workpieces, this CNC machining fixture may damage the parts during the clamping and machining process. Utility Model Content

[0004] The main purpose of this utility model is to provide a CNC machining fixture that can avoid damage to parts during the machining process, and can improve the stability of the part holding and positioning while enabling rapid loading and unloading of parts.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a CNC machining fixture for clamping parts, comprising: a base plate and a base plate spaced above the base plate, wherein the part includes an inclined arc-shaped cover plate, and the front edge of the arc-shaped cover plate, which is higher than the rear edge, has a downwardly extending side plate, thereby forming a cavity between the side plate and the arc-shaped cover plate, and a horizontally outwardly extending flange strip is formed at the lower end of the side plate, the lower surface of which is flush with the lower end surface at the rear edge of the arc-shaped cover plate; A carrier plate mounted on the upper surface of the substrate has several contour pads that can be correspondingly embedded into the shell cavity of the part and in contact with the lower surface of the arc-shaped cover plate, and several support pads for contacting the lower surface of the upper flange strip of the part. At least two mounting through holes are opened on the upper surface of the substrate and outside the support pads. Each mounting through hole is provided with a spinning cylinder. The main body of the spinning cylinder is mounted on the substrate. The upper end of the piston rod of the spinning cylinder is located above the substrate and is equipped with a rocker arm. One end of the rocker arm is connected to the piston rod, and the other end is used to press and contact the upper surface of the upper flange strip of the part.

[0006] The following are further improvements to the above technical solution: 1. In the above scheme, the base plate and the substrate are connected by at least 3 support columns.

[0007] 2. In the above scheme, the support columns are respectively set at the four corners of the substrate.

[0008] 3. In the above scheme, the contour pad has several material discharge holes.

[0009] 4. In the above scheme, the main body of the spinning cylinder is connected to the base plate by a mounting block.

[0010] 5. In the above scheme, the other end of the mounting block, which is connected to the upper surface of the substrate, covers the mounting through hole and has a clearance hole that cooperates with the spinning cylinder.

[0011] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: This utility model CNC machining fixture has a carrier plate mounted on the upper surface of a base plate. The upper surface of the carrier plate has several contour pads that can be correspondingly embedded into the cavity of the part and contact the lower surface of the arc-shaped cover plate, and several support pads that contact the lower surface of the upper flange strip of the part. At least two mounting through holes are opened on the upper surface of the base plate and outside the support pads. The main bodies of at least two spinning cylinders, corresponding to the mounting through holes, are mounted on the base plate. The upper end of the piston rod of each spinning cylinder passes through the corresponding mounting through hole and is fitted with a pressure block. The lower surface of the other end of the pressure block, connected to the piston rod at one end, is used to press and contact the upper surface of the upper flange strip of the part. This design can achieve stable support for irregularly shaped parts to avoid damage during machining, and can also improve the stability of the pressing and positioning of the parts while enabling rapid loading and unloading, preventing positional displacement of the parts during machining and improving machining accuracy. Attached Figure Description

[0012] Appendix Figure 1 This is a schematic diagram of the structure of the CNC machining fixture of this utility model with parts loaded in it; Appendix Figure 2 This is a schematic diagram of the structure of the part processed by the CNC machining fixture of this utility model; Appendix Figure 3 This is a schematic diagram of the structure of the CNC machining fixture of this utility model; Appendix Figure 4 This is an exploded view of the CNC machining fixture of this utility model.

[0013] In the above attached figures: 100, part; 101, arc-shaped cover plate; 102, side plate; 103, shell cavity; 104, flange strip; 1, base plate; 2, base plate; 31, contour pad; 32, support pad; 4, support column; 5, mounting through hole; 6, spinning cylinder; 61, main body; 62, piston rod; 63, rocker arm; 64, pressure head; 7, mounting block; 71, clearance hole; 8, blanking through hole. Detailed Implementation

[0014] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0015] Example 1: A CNC machining fixture for clamping part 100 includes: a base plate 1 and a base plate 2 spaced above the base plate 1. The part 100 includes an inclined arc-shaped cover plate 101. The front edge of the arc-shaped cover plate 101, which is higher than the rear edge, has a downwardly extending side plate 102, thereby forming a cavity 103 between the side plate 102 and the arc-shaped cover plate 101. A horizontally outwardly extending flange strip 104 is formed at the lower end of the side plate 102. The lower surface of the flange strip 104 is flush with the lower end face of the rear edge of the arc-shaped cover plate 101. A carrier plate 3 mounted on the upper surface of the substrate 2 has several contour pads 31 that can be correspondingly embedded in the cavity 103 of the part 100 and in contact with the lower surface of the arc-shaped cover plate 101, and several support pads 32 that are in contact with the lower surface of the flange strip 104 of the part 100. At least two mounting through holes 5 are opened on the upper surface of the substrate 2 and outside the support pads 32. Each mounting through hole 5 is provided with a spinning cylinder 6. The main body 61 of the spinning cylinder 6 is mounted on the substrate 2. The upper end of the piston rod 62 of the spinning cylinder 6 is located above the substrate 2 and a rocker arm 63 is mounted thereon. The other end of the rocker arm 63, which is connected to the piston rod 62 at one end, is used to press and contact the upper surface of the flange strip 104 of the part 100.

[0016] The main body 61 of the aforementioned spinning cylinder 6 is mounted and connected to the base plate 2 via a mounting block 7; the other end of the mounting block 7, which is connected to the upper surface of the base plate 2 at one end, covers the mounting through hole 5 and has a clearance hole 71 that mates with the spinning cylinder 6.

[0017] A pressure head 64 is installed at the end of the rocker arm 63 of the aforementioned spinning cylinder 6 away from the piston rod 62; when in the pressing state, the pressure head 64 of the aforementioned spinning cylinder 6, which is in pressing cooperation with the flange strip 104 of the part 100, is located directly above the support pad 32.

[0018] Example 2: A CNC machining fixture for clamping part 100 includes: a base plate 1 and a base plate 2 spaced above the base plate 1. The part 100 includes an inclined arc-shaped cover plate 101. The front edge of the arc-shaped cover plate 101, which is higher than the rear edge, has a downwardly extending side plate 102, thereby forming a cavity 103 between the side plate 102 and the arc-shaped cover plate 101. A horizontally outwardly extending flange strip 104 is formed at the lower end of the side plate 102. The lower surface of the flange strip 104 is flush with the lower end face of the rear edge of the arc-shaped cover plate 101. A carrier plate 3 mounted on the upper surface of the substrate 2 has several contour pads 31 that can be correspondingly embedded in the cavity 103 of the part 100 and in contact with the lower surface of the arc-shaped cover plate 101, and several support pads 32 that are in contact with the lower surface of the flange strip 104 of the part 100. At least two mounting through holes 5 are opened on the upper surface of the substrate 2 and outside the support pads 32. Each mounting through hole 5 is provided with a spinning cylinder 6. The main body 61 of the spinning cylinder 6 is mounted on the substrate 2. The upper end of the piston rod 62 of the spinning cylinder 6 is located above the substrate 2 and a rocker arm 63 is mounted thereon. The other end of the rocker arm 63, which is connected to the piston rod 62 at one end, is used to press and contact the upper surface of the flange strip 104 of the part 100.

[0019] The base plate 1 and the substrate 2 are connected by at least three support columns 4; the four support columns 4 are respectively located at the four corners of the substrate 2; the contour pad 31 is provided with several material dropping holes 8; the two spinning cylinders 6 are respectively located on both sides of the contour pad 31. The spinning cylinders are purchased externally and belong to the prior art, so they will not be described in detail here.

[0020] When using it, first place the spinning cylinder in the non-pressing state, then put the part to be processed into the base plate accordingly, and make the lower surface of the arc-shaped cover plate of the part correspond to the contour pad on the base plate, so that the contour pad provides good support for the arc-shaped cover plate and avoids deformation and other adverse damage to the arc-shaped cover plate during processing. Simultaneously, the lower surface of the part's flange strip is aligned with the support pad on the substrate. Then, the spinning cylinder is switched to the holding state. During this process, the rocker arm drives the pressure head to rotate directly above the flange strip while simultaneously moving downwards to press against the upper surface of the flange strip, thereby achieving the holding and positioning of the part. By switching the state of the spinning cylinder, the part can be quickly loaded and unloaded, and the positional shift or vibration of the part after being subjected to force during processing can be effectively avoided, which would cause vibration and affect the processing accuracy.

[0021] The CNC machining fixture of this invention can not only provide stable support for irregularly shaped parts to avoid damage to the parts during the machining process, but also improve the stability of the clamping and positioning of the parts while enabling rapid loading and unloading of the parts, thus avoiding positional displacement of the parts during the machining process and improving the machining accuracy.

[0022] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A CNC machining fixture for clamping a part (100), comprising: The base plate (1) and the substrate (2) spaced above the base plate (1) are characterized in that: the part (100) includes an inclined arc-shaped cover plate (101), and the front edge of the arc-shaped cover plate (101) with its front end higher than its rear end has a downwardly extending side plate (102), thereby forming a cavity (103) between the side plate (102) and the arc-shaped cover plate (101), and a horizontally outwardly extending flange strip (104) is formed at the lower end of the side plate (102), the lower surface of which is flush with the lower end face at the rear edge of the arc-shaped cover plate (101); A carrier plate (3) mounted on the upper surface of the substrate (2) has a plurality of contour pads (31) that can be correspondingly embedded in the cavities (103) of the parts (100) and in contact with the lower surface of the arc-shaped cover plate (101), and a plurality of support pads (32) for contacting the lower surface of the flange strip (104) on the parts (100). At least two mounting points are provided on the upper surface of the substrate (2) and on the outside of the support pads (32). Each of the mounting through holes (5) is provided with a spinning cylinder (6). The main body (61) of the spinning cylinder (6) is mounted on the base plate (2). The upper end of the piston rod (62) of the spinning cylinder (6) is located above the base plate (2) and a rocker arm (63) is mounted thereon. One end of the rocker arm (63) is connected to the piston rod (62), and the other end is used to press and contact the upper surface of the flange strip (104) on the part (100).

2. The CNC machining fixture according to claim 1, characterized in that: The base plate (1) and the substrate (2) are connected by at least three support columns (4).

3. The CNC machining fixture according to claim 2, characterized in that: The four support columns (4) are respectively located at the four corners of the base plate (2).

4. The CNC machining fixture according to claim 1, characterized in that: The conformal pad (31) has several material discharge holes (8).

5. The CNC machining fixture according to claim 1, characterized in that: The main body (61) of the spinning cylinder (6) is mounted and connected to the base plate (2) via a mounting block (7).

6. The CNC machining fixture according to claim 5, characterized in that: The other end of the mounting block (7), which is connected to the upper surface of the substrate (2) at one end, covers the mounting through hole (5) and has a clearance hole (71) that cooperates with the spinning cylinder (6).

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