A thin-walled workpiece machining clamping mechanism

Abstract

The application provides a thin-walled part machining clamping mechanism, and belongs to the technical field of machining, to solve the problem that the clamping mechanism is not attached to the clamping surface of a non-standard frame or a circular thin-walled part, and comprises a base, a multi-sided clamping frame arranged on the base, a support strip rotatably connected to each side of the clamping frame, a clamping block slidingly arranged on the top of the support strip, the clamping block being in a stepped type decreasing from outside to inside, a triangular end head hingedly connected to the end of the clamping block, a notch arranged on the front side of the triangular end head, a swing rod installed in the notch, and a contact piece sleeved on the swing rod.

Description

Technical Field

[0001] This invention belongs to the field of machining technology, and more specifically, relates to a clamping mechanism for machining thin-walled parts. Background Technology

[0002] Thin-walled parts typically refer to lightweight structural components whose wall thickness to overall outline size ratio is much less than 1 / 20. They are commonly found in aerospace, precision instruments, and automotive manufacturing. Since the material removal rate often exceeds 90%, the residual stress inside the blank is gradually released during cutting, which can easily lead to torsional deformation. Therefore, a multi-layer symmetrical milling strategy is required. After milling, the finishing process needs to be carried out on a clamping mechanism. However, for some non-standard frame or circular thin-walled parts, the vibration generated by grinding during clamping can cause uneven force transmission and non-fitting clamping surfaces, resulting in deformation of the thin-walled parts.

[0003] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a clamping mechanism for thin-walled parts processing, in order to achieve a more practical purpose. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a clamping mechanism for thin-walled parts processing, thereby solving the problem that the clamping mechanism does not fit the clamping surface of non-standard frame or circular thin-walled parts.

[0005] The purpose and effect of the thin-walled part processing clamping mechanism of the present invention are achieved by the following specific technical means:

[0006] A clamping mechanism for processing thin-walled parts includes a base, on which a multi-sided clamping frame is provided. Each side of the clamping frame is rotatably connected to a support bar. A clamping block is slidably provided on the top of the support bar. The clamping block is stepped in shape, decreasing from the outside to the inside. A triangular end is hinged to the end of the clamping block. A notch is provided on the front side of the triangular end. A swing rod is installed in the notch. A contact element is sleeved on the swing rod.

[0007] Furthermore, a rotating seat is provided in the notch of the triangular end, a connecting pin is provided on the rotating seat, the swing rod is hinged to the rotating seat by the connecting pin, and a limiting groove is opened at the bottom of the notch, the bottom end of the swing rod extends into the limiting groove.

[0008] Furthermore, the contact element includes an irregularly shaped rubber block, which is fitted onto the swing arm through an internal hole.

[0009] Furthermore, the contact element includes a corrugated elastic sheet, on which a connecting ring is fixedly disposed, and the corrugated elastic sheet is sleeved on the swing arm through the connecting ring.

[0010] Furthermore, knobs are provided on both sides of the support bar, and corresponding rotating grooves are opened on the inner wall of the receiving groove. The knobs are locked in the corresponding rotating grooves. The bottom section of the receiving groove is provided with an inclined slope section that limits the swing range of the support bar. A central column is provided through the center of the base. Two actuating discs are provided on the central column. The end of the support bar forms an end plate, which extends between the two actuating discs.

[0011] Furthermore, the top surface of the triangular end is lower than the lowest step surface of the clamping block, an L-shaped block is provided on the top of the triangular end, and a corresponding L-shaped groove is opened on the top of the lowest step of the clamping block.

[0012] Furthermore, a connecting sleeve is provided at the hinge of the triangular end, a hinge shaft passes through the end of the clamping block, the connecting sleeve is fitted on the hinge shaft and rotates, and an movable hole with a width greater than the width of the hinge shaft is opened in the connecting sleeve.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The contact element connected by the swing arm can adapt to the edges of thin-walled parts at different angles on the vertical plane. With the flip-out triangular end, the contact element can clamp the outer wall or inner wall of the thin-walled part, adapting to the clamping and fixing of non-standard thin-walled parts and reducing the deformation generated during the finishing of thin-walled parts. Attached Figure Description

[0015] Figure 1 This is a perspective view of a clamping mechanism for processing thin-walled parts according to the present invention.

[0016] Figure 2 This is an exploded view of a clamping mechanism for processing thin-walled parts according to the present invention.

[0017] Figure 3 yes Figure 2 A magnified view of region A in the middle.

[0018] Figure 4 This is a cross-sectional view of a clamping mechanism for processing thin-walled parts according to the present invention.

[0019] Figure 5 This is a structural diagram of another embodiment.

[0020] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0021] 1. Base; 2. Clamping frame; 3. Support bar; 4. Clamping block; 5. Triangular end; 6. Contact element; 7. Center column; 8. Connecting sleeve; 201. Receiving groove; 202. Rotary groove; 301. Sliding groove; 302. Knob; 303. End plate; 501. Notch; 502. Rotary seat; 503. Limiting groove; 504. Swing rod; 505. Connecting pin; 801. Movable hole. Detailed Implementation

[0022] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0023] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] Example:

[0026] As attached Figure 1 To be continued Figure 4 As shown:

[0027] This invention provides a clamping mechanism for processing thin-walled parts, including a base 1, on which a multi-sided clamping frame 2 is provided. In this embodiment, the clamping frame 2 is cross-shaped with four sides. Each side of the clamping frame 2 is rotatably connected to a support bar 3. A knob 302 is provided on both sides of the support bar 2. A corresponding rotating groove 202 is opened on the inner wall of the receiving groove 201. The knob 302 is locked in the corresponding rotating groove 202. The support bar 3 can rotate around the knob 302. However, due to the limited space inside the clamping frame 2, the support bar 3 can only swing within a small range.

[0028] like Figure 4 As shown, the bottom section of the receiving groove 201 is provided with an inclined slope section 2011 that limits the swing range of the support bar 3. The support bar 3 swings inward until it abuts against the inclined slope section 2011, while the support bar 3 swings outward until it abuts against the outer edge of the receiving groove 201 horizontally.

[0029] In addition, a central column 7 is provided through the center of the base 1, and two actuating discs 701 are provided on the central column 7. The end plate 303 is formed at the end of the support bar 3 and extends between the two actuating discs 701. The central column 7 is controlled to rise and fall by a cylinder. When the central column 7 rises, the lower actuating disc 701 pushes the support bar 3 horizontally. When the two central columns 7 fall, the upper actuating disc 701 drives the support bar 3 to swing inward until it abuts against the inclined slope section 2011.

[0030] A clamping block 4 is slidably provided on the top of the support bar 3. The clamping block 4 is in the form of a stepped shape that decreases from the outside to the inside. The lifting and lowering of the central column 7 enables the support bar 3 to swing, which allows the support bar 3 to drive the clamping block 4 to float and clamp thin-walled parts with non-standard vertical surfaces, so that the clamping block 4 fits the thin-walled parts, increases its clamping area, and avoids deformation caused by finishing.

[0031] The clamping block 4 has a triangular end 5 hinged to its end. A notch 501 is provided on the front side of the triangular end 5, and a swing rod 504 is installed within the notch 501. A contact element 6 is sleeved on the swing rod 504, which abuts against the clamped object. The swing rod 504 can swing within the notch 501. Figure 3 As shown, a rotating seat 502 is provided in the notch 501 of the triangular end 5. A connecting pin 505 is provided on the rotating seat 502. The rocker arm 504 is hinged to the rotating seat 502 through the connecting pin 505. The rocker arm 504 can rotate around the connecting pin 505. One end of the connecting pin 505 is threaded. The thread and nut can be used to install the connecting pin. However, the diameter of one end of the connecting pin needs to be larger than the hole of the rotating seat 502 so that it cannot completely pass through the rotating seat 502. If both ends of the connecting pin 505 are threaded, this design is not required.

[0032] Furthermore, a limiting groove 503 is provided at the bottom of the notch 501, and the bottom end of the swing rod 504 extends into the limiting groove 503. The limiting groove 503 matches the hemispherical bottom of the swing rod 504, limiting the swing range of the swing rod 504 and reducing the wear of the end contact of the swing rod 504.

[0033] Contact element 6 includes a corrugated elastic sheet, such as Figure 3 As shown, a connecting ring is fixedly installed on the corrugated elastic sheet. The corrugated elastic sheet is sleeved on the swing rod 504 through the connecting ring. When temporarily clamping and fixing thin-walled parts, the corrugated elastic sheet can be used for clamping and fixing during sanding. It can make multi-line contact and adapt to various irregular inclined surfaces.

[0034] In other embodiments, the contact 6 also includes an irregularly shaped rubber block, such as... Figure 5 As shown, the irregularly shaped rubber block is fitted onto the swing arm 504 through internal holes. The irregularly shaped rubber block is used to clamp and fix the thin-walled part during grinding with a grinding wheel, so as to prevent the thin-walled part from deforming due to vibration caused by elastic clamping.

[0035] Since the triangular end 5 is hinged to the end of the clamping block 4, the contact member 6 can clamp the outer wall or the inner wall of the thin-walled part through the flip-out triangular end 5, which can adapt to the clamping and fixing of non-standard thin-walled parts and reduce the deformation generated during the finishing of thin-walled parts.

[0036] In addition, a connecting sleeve 8 is provided at the hinge of the triangular end 5, and a hinge shaft passes through the end of the clamping block 4. The connecting sleeve 8 is fitted onto the hinge shaft and rotates, such as Figure 3 As shown, a movable hole 801 with a width greater than the width of the hinge shaft is opened in the connecting sleeve 8, so that after the triangular end 5 is flipped and attached to the upper surface of the clamping block 4, it can still slide a certain position towards the center. The top surface of the triangular end 5 is lower than the lowest step surface of the clamping block 4. An L-shaped block 9 is provided on the top of the triangular end 5. The L-shaped block 9 does not exceed the height of the clamping block 4 and does not affect the step clamping of the workpiece by the clamping block 4. A corresponding L-shaped groove 10 is opened on the top of the lowest step of the clamping block 4. When the triangular end 5 is flipped and attached to the clamping block 4, the L-shaped block 9 extends into the opening of the L-shaped groove 10. When the contact member 6 abuts against the inner wall of the thin-walled part and is pushed, the extended end of the L-shaped block 9 slides into the interior of the L-shaped groove 10, thereby locking the triangular end 5 and preventing the triangular end 5 from detaching from the clamping block 4.

[0037] In this embodiment, the clamping block 4 is driven to move by a screw that is rotatably connected to the support bar 3. The screw passes through the clamping block 4 and is threadedly connected to the clamping block 4.

[0038] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A clamping mechanism for machining thin-walled parts, characterized in that: Includes a base (1), on which a multi-sided clamping frame (2) is provided. Each side of the clamping frame (2) is rotatably connected to a support bar (3). A clamping block (4) is slidably provided on the top of the support bar (3). The clamping block (4) is a stepped shape that decreases from the outside to the inside. A triangular end (5) is hinged to the end of the clamping block (4). A notch (501) is opened on the front side of the triangular end (5). A swing rod (504) is installed in the notch (501). A contact element (6) is sleeved on the swing rod (504).

2. The clamping mechanism for thin-walled part processing as described in claim 1, characterized in that: A rotating seat (502) is provided in the notch (501) of the triangular end (5). A connecting pin (505) is provided on the rotating seat (502). The swing rod (504) is hinged to the rotating seat (502) through the connecting pin (505). A limiting groove (503) is provided at the bottom of the notch (501). The bottom end of the swing rod (504) extends into the limiting groove (503).

3. The clamping mechanism for thin-walled part processing as described in claim 1, characterized in that: The contact element (6) includes a shaped rubber block, which is fitted onto the swing arm (504) through an internal hole.

4. The clamping mechanism for thin-walled part processing as described in claim 1, characterized in that: The contact element (6) includes a corrugated elastic sheet, on which a connecting ring is fixedly disposed, and the corrugated elastic sheet is sleeved on the swing rod (504) through the connecting ring.

5. The clamping mechanism for thin-walled part processing as described in claim 1, characterized in that: Both sides of the support bar (2) are provided with knobs (302), and the inner wall of the receiving groove (201) is provided with corresponding rotating grooves (202). The knobs (302) are locked in the corresponding rotating grooves (202). The bottom part of the receiving groove (201) is provided with an inclined slope section (2011) that limits the swing range of the support bar (3). A central column (7) is provided through the center of the base (1). Two dials (701) are provided on the central column (7). The end of the support bar (3) forms an end plate (303), which extends between the two dials (701).

6. The clamping mechanism for machining thin-walled parts as described in claim 1, characterized in that: The top surface of the triangular end (5) is lower than the lowest step surface of the clamping block (4), and an L-shaped block (9) is provided on the top of the triangular end (5). A corresponding L-shaped groove (10) is opened on the top of the lowest step of the clamping block (4).

7. The clamping mechanism for thin-walled part processing as described in claim 6, characterized in that: A connecting sleeve (8) is provided at the hinge of the triangular end (5), and a hinge shaft is passed through the end of the clamping block (4). The connecting sleeve (8) is fitted on the hinge shaft and rotates. An movable hole (801) with a width greater than the width of the hinge shaft is opened in the connecting sleeve (8).

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