Tool clamp

Abstract

The utility model provides a tool clamp, belongs to the technical field of machining, and solves the problems that an existing clamp is high in cost and not reliable and stable in clamping effect. The tool clamp comprises a supporting disc and a pressing disc and is characterized in that the upper side of the supporting disc is provided with a limiting part arranged in a protruding mode, a plurality of stand columns are detachably connected to the edge of the side of the supporting disc in the circumferential direction, and the pressing plate abuts against the top ends of the stand columns and is detachably connected with the top ends of the stand columns; a gap for a workpiece to extend into is reserved between the side wall of the stand column and the side wall of the limiting part. According to the tool clamp, the cost is saved, and reliable and stable clamping is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of machining technology and relates to a tooling fixture. Background Technology

[0002] Thin-walled parts are components with relatively thin walls, widely used in aerospace, electronics, mold making, and other industries. However, due to their thin walls and poor rigidity, these parts are extremely prone to deformation during clamping and machining.

[0003] To this end, Chinese patent application (application number: 201310341898.4) discloses a fixture and method for precision machining of the inner hole of a thin-walled sleeve, comprising a positioning seat composed of a small cylinder A and a large cylinder. The right end of the inner cavity of the large cylinder is a conical surface, and the left end of the inner cavity of the large cylinder is a circular hole. The circular hole at the left end and the conical surface at the right end are connected by a transition step surface B. The right end of the large cylinder is provided with an external thread. An elastic bushing is inserted into the right end of the inner cavity of the positioning seat. The outer conical surface of the elastic bushing and the right end of the inner cavity of the positioning seat are matched with each other by a 1:10 taper. The thin-walled sleeve is inserted into the inner hole of the cylindrical surface of the elastic bushing. The left end of the elastic bushing and the thin-walled sleeve abuts against the transition step surface B. A rubber gasket is installed on the right end of the thin-walled sleeve. The internal thread of the end cap matches the fine-pitch external thread at the right end of the positioning seat. The thin-walled sleeve is pressed tightly by the rubber gasket. The side wall of the elastic bushing is provided with a 2mm cut-out.

[0004] However, the above method has the following drawbacks: 1. By using a 1:10 taper to match the outer conical surface of the elastic bushing with the right end of the inner cavity of the positioning seat, the inner hole of the elastic bushing fits snugly against the outer circle of the thin-walled sleeve, achieving automatic centering of the thin-walled sleeve. However, machining two matching conical surfaces requires controlling the inclination angle, flatness, and position of the outer conical surface relative to the axis of the positioning seat, which demands high machining accuracy and is costly. 2. If chips adhere to the conical surface, thermal deformation due to temperature differences, and machining errors prevent the two conical surfaces from fitting well, the inner hole of the elastic bushing and the outer circle of the thin-walled sleeve will not fit snugly. This may not only cause deformation of the thin-walled sleeve due to uneven pressure but may also push the thin-walled sleeve out of the stepped surface, making it difficult to guarantee reliable and stable clamping. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned problems in existing technologies by proposing a tooling fixture. The technical problem to be solved by this utility model is: how to save costs and achieve reliable and stable clamping.

[0006] The purpose of this utility model can be achieved through the following technical solution: a tooling fixture, including a support plate and a pressure plate, characterized in that the upper side of the support plate has a protruding limiting part, and a plurality of columns are detachably connected to the edge of the support plate along the circumferential direction, the pressure plate abuts against the top of the columns and is detachably connected to the end there, and a gap is left between the side wall of the column and the side wall of the limiting part for the workpiece to extend into.

[0007] In practical operation, one end of the workpiece is inserted into the gap between the side wall of the column and the side wall of the limiting part until its end face abuts against the surface of the support plate. Simultaneously, the pressure plate moves closer to the support plate along the length of the column until its surface abuts against the other end face of the workpiece. The pressure plate and support plate then clamp and fix the workpiece. The workpiece is clamped and fixed using the column, pressure plate, and support plate. The column and plate have low machining requirements, and since the end faces of the column, pressure plate, and support plate are all flat, there are no special requirements for angular fit. Furthermore, the structure is relatively simple, and individual parts can be replaced individually, saving costs. The column not only guides the pressure plate as it approaches the support plate, preventing lateral displacement of the pressure plate relative to the support plate, but also effectively limits circumferential misalignment of the workpiece relative to the support plate. This ensures that the clamping force is evenly distributed on both end faces of the product, facilitating fast, stable, and reliable clamping. By adjusting the height of the columns, it can accommodate workpieces of different heights. Furthermore, the gaps between the columns allow it to accommodate workpieces of different shapes, thereby improving applicability, reducing costs, and enabling stable and reliable clamping of different workpieces.

[0008] In the aforementioned tooling fixture, the limiting part is disc-shaped. This disc-shaped limiting part not only adapts well to cylindrical workpieces, with its outer wall abutting against the inner wall of the workpiece, but also, because a circle is an axially symmetric shape, the relative position between the workpiece and the limiting part is less prone to significant shifts. This facilitates the even application of clamping force to the workpiece, resulting in stable and reliable clamping. Furthermore, even if the workpiece to be processed has an irregular shape, as long as part of its inner wall can contact the outer wall of the limiting part, a certain degree of limiting can be achieved. A bushing suitable for irregularly shaped workpieces can also be fitted onto the limiting part, making it highly adaptable. Moreover, the regular shape of the cylindrical limiting part also reduces costs to some extent.

[0009] In the aforementioned tooling fixture, the pressure plate is annular, and its width is greater than the diameter of the column. This wider pressure plate ensures that it fully covers the column end face while its outer extension also fully covers the workpiece end face, facilitating stable and reliable clamping. The annular pressure plate also helps to evenly transmit the clamping force along the circumference to the column and workpiece end face. Furthermore, compared to a solid disc, the annular pressure plate significantly reduces weight, resulting in a lighter overall structure and lower material costs.

[0010] In the aforementioned tooling fixture, the radial distance between the outer wall of the support plate and the outer wall of the limiting part is greater than the diameter of the column. This greater radial distance facilitates adequate support for the bottom of the column, enabling a stable and reliable detachable connection between the column and the edge of the support plate.

[0011] In the aforementioned tooling fixture, one end of the column is threaded to the edge of the support plate, and the other end is equipped with a fastener. The fastener passes through the pressure plate and secures the pressure plate to the column. The threaded connection between one end of the column and the edge of the support plate, along with the fastener passing through the pressure plate and pressing the pressure plate against the end face of the column and the end face of the workpiece, facilitates quick assembly and disassembly, allowing for convenient and rapid replacement of the column.

[0012] In the aforementioned tooling fixture, the columns are arranged in a circumferential array along the support plate. This circumferential array of columns facilitates the uniform and stable transmission of clamping force to the workpiece end face and effectively resists circumferential interference forces. Furthermore, even if one column wears out, the other columns can still maintain normal operation, contributing to stable and reliable clamping.

[0013] The aforementioned tooling fixture has a protruding clamping portion on the lower side of the support plate. During operation, the larger diameter support plate body provides stable and reliable support for the workpiece, while the smaller diameter clamping portion provides clamping points for the grippers.

[0014] The aforementioned tooling fixture has a through hole on the support plate, which extends to the surface of the limiting part and the surface of the clamping part. The through hole penetrates the support plate from its thickest point, making full use of the material thickness to disperse stress, reducing the impact on structural strength, and facilitating stable and reliable clamping.

[0015] Compared with existing technologies, this tooling fixture has the following advantages:

[0016] 1. In this tooling fixture, the workpiece is clamped and fixed by the column, pressure plate and support plate. The column and plate have low machining requirements. Moreover, the end face of the column, the surface of the pressure plate and the surface of the support plate are all flat, and there are no special requirements for the angle fit. In addition, the structure is relatively simple and individual parts can be replaced individually, saving costs.

[0017] 2. In this tooling fixture, the column not only plays a guiding role as the pressure plate approaches the support plate, preventing the pressure plate from shifting laterally relative to the support plate, but also effectively limits the workpiece from misaligning relative to the support plate in the circumferential direction. This ensures that the clamping force is evenly distributed on both ends of the product, which is conducive to achieving fast, stable and reliable clamping.

[0018] 3. In this tooling fixture, by adjusting the height of the columns, it can accommodate workpieces of different heights. Moreover, the gap between the columns can accommodate workpieces of different shapes, thereby improving applicability, reducing costs, and enabling stable and reliable clamping of different workpieces. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this tooling fixture.

[0020] Figure 2 This is a bottom view of the workpiece being held in this tooling fixture.

[0021] Figure 3 This is a top view of the workpiece being held in this tooling fixture.

[0022] Figure 4 yes Figure 3 A cross-sectional view along the AA direction.

[0023] In the figure, 1 is the support plate; 1a is the limiting part; 1b is the clamping part; 2 is the pressure plate; 3 is the column; 4 is the fastener; and 5 is the through hole. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As can be seen, this tooling fixture includes a support plate 1 and a pressure plate 2. The upper side of the support plate 1 has a protruding limiting part 1a, which allows the workpiece to be fitted onto it. The lower side of the support plate 1 has a protruding clamping part 1b, which allows the grippers to hold the workpiece. The support plate 1 has a through hole 5, which extends to the surface of the limiting part 1a and the surface of the clamping part 1b. The through hole 5 penetrates the support plate 1 from its thickest point, making full use of the material thickness to disperse stress, reducing the impact on structural strength, and facilitating stable and reliable clamping. The larger diameter of the support plate 1 body provides stable and reliable support for the workpiece, while the smaller diameter of the clamping part 1b provides a clamping point for the grippers.

[0027] Specifically, both the limiting part 1a and the clamping part 1b are disc-shaped.

[0028] The tooling fixture also includes several columns 3 distributed circumferentially along the support plate 1. The two ends of each column 3 are detachably connected to the edges of the pressure plate 2 and the support plate 1, respectively. An annular gap is provided between the side wall of the column 3 and the side wall of the limiting part 1a for the workpiece to extend into. The disc-shaped limiting part 1a can not only adapt well to the shape of cylindrical workpieces, but also, since a circle is an axisymmetric shape, the relative position between the workpiece and the limiting part 1a is less prone to large displacements, which helps to evenly apply the clamping force to the workpiece, thereby achieving stable and reliable clamping. At the same time, even if the shape of the workpiece to be processed is irregular, as long as part of its inner sidewall can contact the outer sidewall of the limiting part 1a, a certain degree of limitation can be achieved. A bushing suitable for irregularly shaped workpieces can also be fitted onto the limiting part 1a, making it highly adaptable. Furthermore, the regular shape of the cylindrical limiting part 1a also reduces costs to some extent.

[0029] The aforementioned pressure plate 2 is annular, and its width is greater than the diameter of the column 3. The radial distance between the outer wall of the support plate 1 and the outer wall of the limiting part 1a is greater than the diameter of the column 3. Several threaded holes are provided circumferentially along the edge of the support plate 1, and the bottom end of the column 3 is provided with external threads. The bottom end of each column 3 is threadedly connected to the corresponding threaded hole. The width of the pressure plate 2 is greater than the diameter of the column 3, allowing it to fully cover the top end face of the column 3 while also fully covering the end face of the workpiece. The radial distance between the outer wall of the support plate 1 and the outer wall of the limiting part 1a is greater than the diameter of the column 3, which helps to provide sufficient support for the bottom end of the column 3, allowing for minor positional errors and providing space for replacing columns 3 with larger diameter ones, thus facilitating stable and reliable clamping. The annular pressure plate 2 helps to evenly transmit the clamping force along the circumference to the column 3 and the end face of the workpiece. Moreover, compared to a solid disc, the annular pressure plate 2 significantly reduces weight, making the overall structure lightweight and reducing material costs.

[0030] Specifically, the bottom end of the column 3 is threaded to the edge of the support plate 1, and the top end is equipped with a fastener 4, which is a screw. The screw passes through the pressure plate 2 and is threaded to the column 3. One end of the column 3 is threaded to the edge of the support plate 1, and the fastener 4 passes through the pressure plate 2, causing the pressure plate 2 to press against the end face of the column 3 and the end face of the workpiece. This facilitates quick disassembly and assembly, allowing for convenient and quick replacement of the column 3. A washer can also be placed between the screw and the pressure plate 2.

[0031] Each column 3 is arranged in a circumferential array along the support plate 1. This circumferential array of columns 3 facilitates the uniform and stable transmission of clamping force to the workpiece end face and effectively resists circumferential interference forces. Furthermore, even if one column 3 experiences wear, the other columns 3 can still maintain normal operation, contributing to stable and reliable clamping.

[0032] In practical operation, the clamping part 1b is held by a chuck, and the threaded holes on the edge of each column 3 correspond one-to-one with those on the support plate 1 to achieve a threaded connection. The lower end of the workpiece to be processed extends into the gap between the side wall of the column 3 and the side wall of the limiting part 1a until the end face of that end abuts against the upper surface of the edge of the support plate 1. At the same time, the pressure plate 2 moves closer to the support plate 1 along the length of the column 3 until the lower surface of the pressure plate 2 abuts against the upper end face of the workpiece. The pressure plate 2 and the column are then tightened with screws, clamping and fixing the end face of the workpiece. The workpiece is clamped and fixed by the column 3, the pressure plate 2, and the support plate 1. The column and the plate have low machining requirements, and the end face of the column 3, the surface of the pressure plate 2, and the surface of the support plate 1 are all flat, so there are no special requirements for angular fit. Moreover, the structure is relatively simple, and individual parts can be replaced individually, saving costs. The column 3 not only guides the pressure plate 2 as it approaches the support plate 1, preventing lateral displacement of the pressure plate 2 relative to the support plate 1, but also effectively limits circumferential misalignment of the workpiece relative to the support plate 1. This ensures that the clamping force is evenly distributed on both ends of the product, facilitating fast, stable, and reliable clamping. By adjusting the height of the column 3, it can accommodate workpieces of different heights. Furthermore, the gap between the columns 3 allows for the adaptation to workpieces of different shapes, thus improving applicability, reducing costs, and enabling stable and reliable clamping of various workpieces.

[0033] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0034] Although this document frequently uses terms such as support plate 1, limiting part 1a, clamping part 1b, pressure plate 2, column 3, fastener 4, and through hole 5, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A tooling fixture comprising a support disc (1) and a pressure disc (2), characterized in that, The support disc (1) has a protruding limiting part (1a) on the upper side, and a plurality of columns (3) are detachably connected to the side edge of the support disc (1) in the circumferential direction, the pressing disc (2) abuts against the top end of the column (3) and is detachably connected to the end, and a gap for the workpiece to extend into is left between the side wall of the column (3) and the side wall of the limiting part (1a).

2. The tooling fixture of claim 1, wherein, The limiting part (1a) is disc-shaped.

3. A tooling fixture according to claim 1 or 2, wherein, The pressing disc (2) is annular, and the width of the pressing disc (2) is greater than the diameter of the column (3).

4. The tooling fixture of claim 3 wherein, The radial distance between the outer side wall of the support disc (1) and the outer side wall of the limiting part (1a) is greater than the diameter of the column (3).

5. A tool holder according to claim 4, wherein One end of the column (3) is threadedly connected to the edge of the support disc (1), and the other end is provided with a fastener (4), the fastener (4) penetrates the pressing disc (2) and fastens the pressing disc (2) and the column (3).

6. A tool holder according to claim 5, wherein The columns (3) are distributed in an array in the circumferential direction of the support disc (1).

7. A tool holder according to claim 6, wherein The support disc (1) has a protruding clamping part (1b) on the lower side.

8. The tooling fixture of Claim 7 wherein, The support disc (1) is provided with a through hole (5) extending to the surface of the limiting part (1a) and the surface of the clamping part (1b) respectively.

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