A housing clamping tool

Abstract

This application relates to the field of clamping fixture technology, and particularly to a housing clamping fixture, including a base, a support block, a positioning cover plate, and a displacement driving mechanism. The support block and the displacement driving mechanism are both connected to the upper surface of the base. The positioning cover plate is connected to the output end of the displacement driving mechanism. Under the driving action of the displacement driving mechanism, the positioning cover plate moves up and down along the Z-axis and is confined to a position directly above the support block. The top of the support block is open, and this opening extends along the Y-axis. A cavity is provided on the side of the positioning cover plate facing the support block. When the positioning cover plate moves downward to its displacement limit under the drive of the displacement driving mechanism, the cavity of the positioning cover plate cooperates with the top opening of the support block to form a positioning cavity for clamping the workpiece. This application can achieve all-round constraint on the workpiece from multiple dimensions, significantly improving positioning accuracy and stability. Furthermore, multiple positioning cavities can be set within a single fixture, greatly improving workpiece clamping efficiency and processing consistency.

Description

Technical Field

[0001] This application relates to the field of clamping fixture technology, and in particular to a housing clamping fixture. Background Technology

[0002] The vortex flow meter housing is a key component of the vortex flow meter system. It is used to adapt the vortex sensor to the fluid channel, enabling the guidance of medium flow and precise assembly and positioning of the sensor.

[0003] In existing technologies, the machining of vortex jig housings relies on two independent tooling sets for step-by-step operations: first, the top stepped hole is machined using a conventional lathe, and then the side holes are drilled and tapped using a bench drill. However, this method has the following significant drawbacks, mainly: due to the complex structure of the vortex jig housing, although the top stepped hole and small hole can be machined on the same plane, the processing requirements are different. The conventional lathe and bench drill each have their own focus, and a single tooling and equipment cannot balance accuracy and efficiency. Therefore, two independent tooling sets are required for step-by-step operations. However, frequent clamping leads to inconsistent positioning references. The placement angle and clamping force of the workpiece vary slightly each time it is clamped, resulting in cumulative errors. This makes it difficult to guarantee the relative positional accuracy of the stepped hole and small hole, specifically manifested as poor positional consistency between the small holes and excessive coaxiality of the stepped hole. At the same time, multiple clamping will prolong the processing cycle, reduce production efficiency, and the repeated positioning process may cause scratches on the workpiece surface due to improper operation, further affecting the stability of product quality. As industrial automation production continues to demand higher precision, efficiency, and cost control in parts processing, the existing vortex-street mounting housing processing mode can no longer meet the requirements.

[0004] Therefore, there is an urgent need to develop an integrated machining tool that can complete the clamping and processing of multiple workpieces in one go in a machining center, achieving efficient, precise, and low-cost production, and promoting the upgrading of vortex flow equipment manufacturing processes. Utility Model Content

[0005] The purpose of this application is to provide a housing clamping fixture to solve the problems in the prior art, such as the reliance on multiple sets of fixtures for vortex-shutter clamping housing processing, cumbersome clamping and debugging, and poor processing consistency.

[0006] The embodiments of this application can be implemented through the following technical solutions: A clamping fixture includes a base, a support block, a positioning cover plate, and a displacement driving mechanism. The support block is provided in multiple ways. The support block and the displacement driving mechanism are both connected to the upper end face of the base. The positioning cover plate is connected to the output end of the displacement driving mechanism. Under the driving action of the displacement driving mechanism, the positioning cover plate moves up and down along the Z-axis and is confined to a position directly above the support block. Each of the support blocks has an open top, and the opening extends along the Y-axis. The positioning cover plate has a cavity on the side facing the support block that corresponds to each of the support blocks. The cavity extends along the Z-axis and its lower end face is adapted to the workpiece surface. When the positioning cover plate moves downward to the displacement limit under the drive of the displacement driving mechanism, the cavity of the positioning cover plate and the top opening of the support block cooperate to form a positioning cavity for clamping the workpiece.

[0007] Furthermore, along the X-axis, the base is provided with a number of support blocks, and the positioning cover is provided with a number of cavities that correspond one-to-one with the support blocks.

[0008] Furthermore, the top opening of the support block is V-shaped, and the two side walls of the V-shaped opening are symmetrically inclined and extend along the Y-axis.

[0009] Furthermore, the support block includes a first support block and a second support block, the first support block and the second support block being detachably and fixedly connected to the base, and the first support block and the second support block being arranged at intervals along the Y-axis direction.

[0010] Furthermore, the positioning cover plate has a square hole that runs through the Z direction. Along the Y axis, on the lower end face of the positioning cover plate, a first positioning groove and a second positioning groove with an open bottom are respectively formed on both sides of the square hole. The square hole, the first positioning groove and the second positioning groove together constitute the cavity of the positioning cover plate.

[0011] Furthermore, the inner contour of the square hole is adapted to the square structure of the workpiece, and the four corners of the square hole are all rounded to form a semi-circular hole structure.

[0012] Furthermore, along the X-axis, the two ends of the first positioning groove are milled surfaces, the middle part is an arc-shaped groove, and the first positioning groove is continuous along the Y-axis.

[0013] Furthermore, the second positioning groove is an arc-shaped stepped groove that runs through the Y-axis direction, wherein the radius of curvature of the arc at the end of the second positioning groove away from the square hole is smaller than the radius of curvature of the arc at the end adjacent to the square hole, and along the Z-axis direction, the arc surface at the end of the second positioning groove away from the square hole is located below the arc surface at the end adjacent to the square hole.

[0014] Furthermore, both the bottom of the first positioning groove and the second positioning groove are provided with buffer pad receiving grooves, and the buffer pad receiving grooves contain buffer components.

[0015] Furthermore, the displacement driving mechanism is provided at both ends of the base along the X-axis direction.

[0016] The housing clamping fixture provided in the embodiments of this application has at least the following beneficial effects: In terms of structural layout, the base can be flexibly equipped with several support blocks, and correspondingly, the positioning cover plate is also equipped with an equal number of cavities, each of which can precisely fit with the corresponding support block. This design enables the simultaneous clamping and processing of multiple workpieces, greatly improving the utilization rate of the equipment, effectively shortening the overall processing cycle, and significantly improving production efficiency.

[0017] Regarding precise clamping and positioning, the workpiece can be stably supported within the V-shaped opening groove of the support block. This V-shaped structure has excellent self-centering characteristics, automatically adjusting the workpiece position to ensure accurate and stable initial positioning on the support block. The cavity on the side of the positioning cover facing the support block is shaped to match the workpiece surface height. When the positioning cover moves down to its displacement limit under the action of the displacement drive mechanism, the cavity and the support block fit tightly together, forming a stable positioning cavity. This positioning method can apply constraint forces to the workpiece from multiple directions, achieving stable clamping and precise positioning, effectively avoiding workpiece shaking or displacement caused by force during processing, providing a reliable guarantee for high-precision machining and significantly improving machining accuracy.

[0018] In terms of processing convenience, the cavity of the positioning cover plate runs through the Z-axis. This unique design allows operators to directly perform hole machining and other operations on the workpiece clamped in the cavity from above the positioning cover plate, eliminating the need for frequent disassembly and re-clamping of the workpiece during processing. This greatly simplifies the operation process, reduces workpiece positioning errors caused by multiple clamping, effectively ensures the consistency and stability of product quality, reduces the defect rate, saves production costs for enterprises, and enhances market competitiveness. Attached Figure Description

[0019] Figure 1 , Figure 2 Schematic diagrams of the vortex-type mounting housing from different perspectives; Figure 3 This is a schematic diagram of a housing processing fixture according to this application, in which a workpiece is assembled. Figure 4 This is a schematic diagram of the support block being assembled on the base in this application; Figure 5 , Figure 6 These are schematic diagrams of the positioning cover plate in this application from different perspectives.

[0020] Numbers in the diagram 10 - Square structure; 20 - Tubular structure; 100 - Stepped hole; 200 - Center hole; 300 - Small hole; 1-Base; 2-Support block; 21-First support block; 22-Second support block; 3-Positioning cover plate; 30-Square hole; 31-First positioning groove; 32-Second positioning groove; 33-Buffer pad receiving groove; 4-Displacement drive mechanism. Detailed Implementation

[0021] The present application will now be further described based on preferred embodiments and with reference to the accompanying drawings.

[0022] Furthermore, for ease of understanding, various components on the drawings have been enlarged or reduced, but this is not intended to limit the scope of protection of this application.

[0023] Singular forms of words also include plural meanings, and vice versa.

[0024] In the description of the embodiments of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use, they are only for the convenience of describing this application 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 on this application. In addition, in the description of this application, in order to distinguish different units, the terms "first," "second," etc. are used in this specification, but these are not limited by the manufacturing order, nor should they be construed as indicating or implying relative importance. Their names may differ in the detailed description and claims of this application.

[0025] The vocabulary used in this specification is for illustrative purposes and is not intended to limit the scope of this application. It should also be noted that, unless otherwise expressly specified and limited, the terms "set," "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, a direct connection, or an indirect connection via an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of these terms in this application.

[0026] Figure 1 , Figure 2 Schematic diagrams of the vortex-shutter mounting housing from different perspectives, such as... Figure 1 , Figure 2As shown, the vortex jig housing S is an integral structural component composed of a square structure 10 and a tubular structure 20. The square structure 10 has a stepped hole 100 and several small holes 300 at its top, while the tubular structure 20 has a through-hole central hole 200 on its side. Industrial applications have strict requirements for the coaxiality of the stepped hole 100, the consistency of the small holes 300's positions, machining accuracy, production efficiency, and cost control. This application aims to design a clamping fixture that can clamp and position multiple vortex jig housings S in a single setup to meet the machining requirements of different holes, ensuring the consistency of hole machining on each workpiece. For ease of description, ... Figure 3 The center line of the center hole 200 of the vortex-shutter clamping housing S is the Y-axis direction, the direction perpendicular to the Y-axis in the same horizontal plane is the X-axis direction, and the vertical direction perpendicular to the horizontal plane is the Z-axis direction.

[0027] like Figure 3 As shown, a clamping fixture includes a base 1, support blocks 2, a positioning cover plate 3, and a displacement driving mechanism 4. Multiple support blocks 2 are provided. Both the support blocks 2 and the displacement driving mechanism 4 are connected to the upper surface of the base 1. The positioning cover plate 3 is connected to the output end of the displacement driving mechanism 4. Under the driving action of the displacement driving mechanism 4, the positioning cover plate 3 moves up and down along the Z-axis, and its displacement trajectory is limited to directly above the support blocks 2. The top of each support block 2 is open, and this opening is along the Y-axis. The positioning cover plate 3 is oriented through the Z-axis, forming a groove-shaped structure for supporting the workpiece. The side of the positioning cover plate 3 facing the support block 2 is provided with a cavity corresponding to each of the support blocks 2. The cavity is oriented through the Z-axis, and the lower end face is adapted to the surface of the workpiece. When the positioning cover plate 3 moves downward to the displacement limit under the drive of the displacement driving mechanism 4, the cavity of the positioning cover plate 3 cooperates with the support block 2 to form a positioning cavity, thereby realizing the stable clamping and precise positioning of the workpiece, and the workpiece clamped in the cavity can be machined from above the positioning cover plate 3.

[0028] In some preferred embodiments, along the X-axis direction, the base 1 is provided with a plurality of support blocks 2, and correspondingly, the positioning cover plate 3 is provided with a plurality of cavities that correspond one-to-one with the support blocks 2. Preferably, the contour and depth of each cavity are adapted to the shape and size of the opening at the top of the corresponding support block 2, and the arrangement spacing of the cavities on the positioning cover plate 3 is the same as the arrangement spacing of the support blocks 2 on the base 1. The synchronous clamping of multiple workpieces in the X-axis direction greatly improves the clamping efficiency during batch processing and ensures that the positioning reference of all clamped workpieces is unified, thereby improving the dimensional consistency and processing quality stability of batch products.

[0029] In some preferred embodiments, the top opening of the support block 2 is V-shaped, and the two side walls of the V-shaped opening are symmetrically inclined and extend along the Y-axis. When the workpiece is placed in the top opening of the support block 2, the outer circle of the tube structure 20 of the clamped vortex clamping housing S will contact the two side walls of the V-shaped opening. Under the action of its own gravity, the workpiece will automatically slide towards the bottom of the V-shaped opening until it is completely in contact with the two side walls, thereby achieving rapid and accurate alignment of the workpiece on the support block 2, ensuring the initial positioning consistency of the workpiece without additional adjustment operations.

[0030] In some preferred embodiments, such as Figure 4 As shown, the support block 2 includes a first support block 21 and a second support block 22. The first support block 21 and the second support block 22 are detachably and fixedly connected to the base 1, which facilitates flexible replacement of the appropriate support block according to the workpiece specifications. At the same time, the first support block 21 and the second support block 22 are arranged at a preset interval along the Y-axis to form a two-point support structure for the workpiece, which can provide a stable bearing foundation for the workpiece.

[0031] In some preferred embodiments, such as Figure 5 , Figure 6 As shown, the positioning cover plate 3 has a square hole 30 that runs through the Z direction. Along the Y axis, on the lower end face of the positioning cover plate 3, on both sides of the square hole 30, a first positioning groove 31 and a second positioning groove 32 with an open bottom are respectively provided. The square hole 30, the first positioning groove 31 and the second positioning groove 32 together constitute the cavity of the positioning cover plate 3. In some preferred embodiments, the inner contour of the square hole 30 is adapted to the shape of the square structure 10 of the vortex clamping housing S. When the positioning cover plate 3 is pressed down, the square hole 30 can radially limit the square structure 10 of the vortex clamping housing S from all sides, preventing it from shifting during processing. At the same time, the four end corners of the square hole 30 are all rounded to form a semi-circular hole structure. The radius of curvature of the semi-circular hole matches the rounded corner of the end corner of the square structure 10, which can effectively eliminate the sharp edges of the end corners of the square hole 30 and prevent the corners of the square hole 30 from rigidly contacting the end corners of the square structure 10 during the pressing down of the positioning cover plate 3, thus preventing collision damage.

[0032] In some preferred embodiments, viewed along the X-axis, the two ends of the first positioning groove 31 are flat milled surfaces, while the middle part is an arc-shaped groove with a smooth arc transition at the inner edge. The first positioning groove 31 is completely through along the Y-axis, forming a composite positioning structure that adapts to the shape of the workpiece. The second positioning groove 32 is an arc-shaped stepped groove extending along the Y-axis, with a rounded edge at the groove opening. The radius of curvature of the arc at the end of the second positioning groove 32 away from the square hole 30 is smaller than the radius of curvature of the arc at the end adjacent to the square hole 30. Along the Z-axis, the arc surface at the end of the second positioning groove 32 away from the square hole 30 is located below the arc surface at the end adjacent to the square hole 30, forming an arc-shaped limiting structure. This stepped arc-shaped limiting structure formed by the curvature difference can not only closely fit the corresponding part of the workpiece but also effectively limit the displacement of the workpiece during processing.

[0033] When assembly is required, the displacement driving mechanism 4 drives the positioning cover plate 3 to rise, pushing the vortex clamping housing S from the first positioning groove 31 to the second positioning groove 32 along the Y-axis direction, until one end face of the vortex clamping housing S is limited by the arc-shaped limiting structure of the second positioning groove 32. At this time, the vortex clamping housing S is initially positioned by the support block 2 and the positioning cover plate 3, but not yet fully constrained. Then, the displacement driving mechanism 4 drives the positioning cover plate 3 to press down and fit against the surface of the vortex clamping housing S. At this time, the square structure 10 of the vortex clamping housing S is rigidly constrained and limited from all sides by the square hole 30, and the two ends of the tube structure 20 are precisely engaged and limited by the first positioning groove 31 and the second positioning groove 32 respectively. This achieves complete positioning and stable clamping of the vortex clamping housing S in the X, Y, and Z directions, ensuring that it will not have any displacement or shaking during subsequent assembly or processing, providing a reliable structural guarantee for high-precision operation.

[0034] In some preferred embodiments, the bottom of the first positioning groove 31 and the second positioning groove 32 are provided with a buffer pad receiving groove 33. The buffer pad receiving groove 33 is used to receive any one of the buffer components, such as rubber pad, silicone pad, etc. When the positioning cover plate 3 presses the workpiece downward under the drive of the displacement driving mechanism 4, the buffer component in the buffer pad receiving groove 33 can directly contact the surface of the workpiece and absorb the impact force through its own deformation, so as to avoid the rigid collision between the positioning cover plate 3 and the workpiece causing scratches or structural damage to the workpiece surface, thus playing a role in protecting the workpiece.

[0035] In some preferred embodiments, the displacement drive mechanism 4 is any one of a cylinder, hydraulic cylinder, electric push rod, or servo motor combined with a ball screw assembly. Along the X-axis, both ends of the base 1 are equipped with this displacement drive mechanism 4, and the piston rods of the two cylinders are respectively connected to corresponding positions on the lower end face of the positioning cover plate 3. Through the synchronous extension and retraction drive of the two cylinders, the positioning cover plate 3 can be smoothly raised and lowered along the Z-axis, ensuring balanced force on the positioning cover plate 3 during pressing or lifting, further improving the stability and accuracy of workpiece positioning.

[0036] The specific embodiments of this application have been described in detail above. For those skilled in the art, several improvements and modifications can be made to this application without departing from the principle of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A clamping fixture, characterized in that, include: The base (1), support block (2), positioning cover plate (3) and displacement driving mechanism (4) are provided. The support block (2) is provided in multiple ways. The support block (2) and the displacement driving mechanism (4) are both connected to the upper end face of the base (1). The positioning cover plate (3) is connected to the output end of the displacement driving mechanism (4). Under the driving action of the displacement driving mechanism (4), the positioning cover plate (3) moves up and down along the Z-axis and is limited to be located directly above the support block (2). Each of the support blocks (2) has an open top, and the opening extends along the Y-axis. The positioning cover plate (3) has a cavity corresponding to each support block (2) on the side facing the support block (2). The cavity extends along the Z-axis, and its lower end face is adapted to the workpiece surface. When the positioning cover plate (3) moves downward to the displacement limit under the drive of the displacement driving mechanism (4), the cavity of the positioning cover plate (3) cooperates with the top opening of the support block (2) to form a positioning cavity for clamping the workpiece.

2. The clamping fixture according to claim 1, characterized in that: Along the X-axis, the base (1) is provided with several support blocks (2), and the positioning cover plate (3) is provided with several cavities that correspond one-to-one with the support blocks (2).

3. The clamping fixture according to claim 1, characterized in that: The top opening of the support block (2) is V-shaped, and the two side walls of the V-shaped opening are symmetrically inclined and extend along the Y-axis.

4. The clamping fixture according to claim 1, characterized in that: The support block (2) includes a first support block (21) and a second support block (22). The first support block (21) and the second support block (22) are detachably fixed to the base (1). The first support block (21) and the second support block (22) are arranged at intervals along the Y-axis.

5. The clamping fixture according to claim 1, characterized in that: The positioning cover plate (3) has a square hole (30) that runs through the Z direction. Along the Y axis, on the lower end face of the positioning cover plate (3), a first positioning groove (31) and a second positioning groove (32) with an open bottom are respectively provided on both sides of the square hole (30). The square hole (30), the first positioning groove (31) and the second positioning groove (32) together constitute the cavity of the positioning cover plate (3).

6. The clamping fixture according to claim 5, characterized in that: The inner contour of the square hole (30) is adapted to the shape of the square structure (10) of the workpiece, and the four corners of the square hole (30) are all rounded to form a semi-circular hole structure.

7. The clamping fixture according to claim 5, characterized in that: Along the X-axis, the two ends of the first positioning groove (31) are milled surfaces, the middle part is an arc-shaped groove, and the first positioning groove (31) is through along the Y-axis.

8. The clamping fixture according to claim 5, characterized in that: The second positioning groove (32) is an arc-shaped stepped groove that runs through the Y-axis direction. The radius of curvature of the arc at the end of the second positioning groove (32) away from the square hole (30) is smaller than the radius of curvature of the arc at the end adjacent to the square hole (30). In the Z-axis direction, the arc surface at the end of the second positioning groove (32) away from the square hole (30) is located below the arc surface at the end adjacent to the square hole (30).

9. The clamping fixture according to claim 5, characterized in that: The bottom of the first positioning groove (31) and the second positioning groove (32) are provided with a buffer pad receiving groove (33), and the buffer pad receiving groove (33) contains a buffer component.

10. The clamping fixture according to claim 1, characterized in that: Along the X-axis, the displacement driving mechanism (4) is provided at both ends of the base (1).

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