A wedge clamp for clamping sheet material

Abstract

The application provides a wedge-shaped pressing plate for clamping a plate, which comprises a hexagonal nut 1-1, a gasket 1-2, an upper sliding block 1-3, a lower sliding block 1-4 and an anchor bolt 1-5, wherein the upper sliding block 1-3 is characterized in that the bottom dovetail groove rail 1-3-1 is at an angle of 45 degrees with the upper surface, a waist-shaped groove is formed in the middle, the groove width is greater than the diameter of the anchor bolt 1-5 by 0.5 mm, and the dovetail groove rail 1-3-1 is in the shape of a dovetail; the lower sliding block 1-4 is characterized in that the bottom surface is at an angle of 45 degrees with the lower sliding block groove rail 1-4-1, the bottom spline 1-4-3 is connected with the workbench 4 spline groove to play a positioning and stabilizing role, and the dovetail groove rail 1-4-1 is in the shape of a dovetail.

Description

Technical Field

[0001] This invention relates to the improvement of part clamping tooling, specifically a wedge-shaped pressure plate that clamps sheet metal. Background Technology

[0002] In the machining process of parts, the machining quality of the datum plane is the key to the success or failure of the machining. When milling the datum plane of large sheet metal, due to the lack of a vise of the corresponding size, it is necessary to interchange the clamping plates and complete the machining in steps. Due to the characteristics of the blank material itself, its base surface is not flat. Therefore, the datum machined by this method will have obvious tool marks and poor flatness. In order to achieve a qualified datum, it is often necessary to repeatedly flip the datum and mill it to complete the datum machining, which results in extremely low machining efficiency. Summary of the Invention

[0003] This application provides a wedge-shaped clamping plate that clamps sheet metal, thereby solving the problem of low processing efficiency of reference surfaces.

[0004] Technical solution: A wedge-shaped pressure plate for clamping sheet metal, wherein the wedge-shaped pressure plate 1 includes a hexagonal nut 1-1, a washer 1-2, an upper slider 1-3, a lower slider 1-4, and an anchor bolt 1-5, wherein: The upper slider 1-3 is characterized in that the bottom dovetail groove rail 1-3-1 forms a 45-degree angle with the upper surface, and has a waist-shaped groove in the middle. The groove width is 0.5mm wider than the diameter of the anchor bolt 1-5, and the dovetail groove rail 1-3-1 is dovetail-shaped. The lower slider 1-4 is characterized by its bottom surface forming a 45-degree angle with the lower slider groove 1-4-1, the bottom spline 1-4-3 being connected to the keyway of the worktable 4 for positioning and stabilization, and the dovetail groove 1-4-1 being dovetail-shaped. Specifically, the tensile strength of the connection between the internal thread of nut 1-1 and the external thread of anchor bolt 1-5 shall not be less than 400 MPa.

[0005] Specifically, the width of the waist-shaped groove of the upper slider 1-3 is 0.5mm greater than the diameter of the anchor bolt 1-5, the wall thickness at both ends in the length direction is not less than 3mm, and the dovetail groove tip is blunted with R0.3.

[0006] Specifically, the central round hole 1-4-2 of the lower slider 1-4 is 0.5mm larger than the diameter of the anchor bolt 1-5. The width of the lower spline and the size of the worktable positioning groove 4-2 are interference fit, and the dovetail groove tip is blunted with R0.3.

[0007] Specifically, the dovetail groove connection between the upper slider 1-3 and the lower slider 1-4 adopts a clearance fit, allowing them to slide freely in a free state.

[0008] Specifically, the effective length of the external thread of anchor bolts 1-5 shall not be less than half the length of the bolt.

[0009] In summary, this application provides a wedge-shaped clamping plate for holding sheet metal, employing a dovetail joint connection to increase the stability of the tooling connection. It is highly versatile; utilizing its wedge-shaped structure, it can limit and clamp the sides of sheet metal or parts of any size. Especially for large parts that cannot be clamped by a vise, it can maximize the space of the machine tool table, solving the need for side clamping of parts. The tooling is lightweight, easy to disassemble and loosen, has low cost, and can be reused, among other advantages. Attached Figure Description

[0010] Figure 1 This application provides a schematic diagram of the structure of a wedge-shaped pressure plate that clamps sheet metal. Figure 2 A schematic diagram of the structure of an upper slider provided in this application; Figure 3 A schematic diagram of a sliding block provided in this application; Figure 4 A structural schematic diagram of a method of use provided in this application; Wherein: 1-1 is a hexagonal nut, 1-2 is a washer, 1-3 is an upper slider, 1-3-1 is an upper slider waist-shaped groove, 1-3-2 is an upper slider dovetail groove, 1-4 is a lower slider, 1-4-1 is a lower slider dovetail groove, 1-4-2 is a lower slider round hole, 1-4-3 is a lower slider spline, 1-5 is an anchor bolt, 1 is a wedge-shaped pressure plate, 2 is a positioning block, 3 is a workpiece, 4 is a worktable, 4-1 is a worktable foot groove, and 4-2 is a worktable positioning groove. Detailed Implementation

[0011] This application provides a wedge-shaped clamping plate 1 that clamps sheet metal, replacing the vise clamping method. It clamps the part from the side in the free state of the part, eliminating the deformation of the part caused by the pressure applied from the top to the bottom by the clamping plate in conventional methods and the tool connection difference caused by the interchange of clamping plates. It completes the machining of the reference surface in one go.

[0012] Example 1 like Figure 1 As shown, this application provides a wedge-shaped clamping plate for holding sheet metal, comprising: 1-1 a hexagonal nut, 1-2 a washer, 1-3 an upper slider, 1-4 a lower slider, 1-4-1 a dovetail groove for the lower slider, and 1-5 an anchor bolt, wherein: The upper slider 1-3 is characterized in that the bottom dovetail groove rail 1-3-1 forms a 45-degree angle with the upper surface, and has a waist-shaped groove in the middle. The groove width is 0.5mm larger than the diameter of the anchor bolt 1-5, and the dovetail groove rail 1-3-1 is dovetail-shaped. The lower slider 1-4 is characterized by its bottom surface forming a 45-degree angle with the lower slider groove 1-4-1, the bottom spline 1-4-3 being connected to the keyway of the worktable 4 for positioning and stabilization, and the dovetail groove 1-4-1 being dovetail-shaped. Specifically, the nuts 1-1, washers 1-2, upper sliders 1-3, lower sliders 1-4, and anchor bolts 1-5 are all made of steel.

[0013] Specifically, the tensile strength of the connection between the internal thread of nut 1-1 and the external thread of anchor bolt 1-5 shall not be less than 400 MPa.

[0014] Specifically, the width of the waist-shaped groove of the upper slider 1-3 is 0.5mm wider than the diameter of the anchor bolt 1-5. To ensure the versatility of this tooling and to have sufficient sliding stroke, the wall thickness at both ends in the length direction should not be less than 3mm, and the dovetail groove tip should be rounded with a radius of 0.3.

[0015] Specifically, the central round hole 1-4-2 of the lower slider 1-4 is 0.5mm larger than the diameter of the anchor bolt 1-5. The width of the lower spline and the size of the worktable positioning groove 4-2 are always interference fit. The dovetail groove tip is blunted with R0.3.

[0016] Specifically, the dovetail groove connection between the upper slider 1-3 and the lower slider 1-4 adopts a clearance fit, allowing them to slide freely in a free state.

[0017] Specifically, the effective length of the external thread of anchor bolts 1-5 shall not be less than half the length of the bolt.

[0018] It should be noted that by tightening the nut 1-1, the pressure applied to the upper slider 1-3 causes the upper slider 1-3 to slide along the dovetail groove, thereby generating lateral pressure and achieving the clamping effect, which is applicable to a variety of occasions.

[0019] Example 2 As it is Figure 4 As shown, this application provides a method of using a wedge-shaped clamping plate that clamps sheet metal, including: Step 1: Embed the positioning block 2 into the keyway of the worktable, use a dial indicator to straighten it, and keep the two positioning blocks parallel to either the X or Y axis of the machine tool. Then tighten the nut on top of the positioning block 2 and check whether the two positioning blocks are on a straight line. Step 2: Clean the iron filings from the bottom of the workbench 4 and the workpiece 3, remove the burrs from the edges of the workpiece, and make one side of the workpiece fit tightly against the positioning block 2; Step 3: Place the anchor bolts 1-5 into the worktable groove 4-1, keeping the bolt positions parallel to the opposite positioning block 2. Combine the upper slider 1-3 and the lower slider 1-4 together, and then insert the spline 1-4-3 into the worktable positioning groove 4-2 through the screw. Step 4: Place the washer 1-2, then screw on the hex nut 1-1; Step 5: Install the other fixture using the same method, and then screw on the hexagonal nut (1-1). Step 6: Tighten the hexagonal nut 1-1 evenly, and finally tap the workpiece 3 with a wooden mallet to make the bottom surface of the workpiece 3 flat against the workbench surface 4. The pressure applied to the upper slider 1-3 by tightening the nut 1-1 causes the upper slider 1-3 to slide along the dovetail groove, generating a lateral clamping force.

[0020] It should be noted that this application provides a wedge-shaped pressure plate that clamps sheet metal. It has a simple structure and uses a dovetail groove structure for connection, which not only increases its overall shape, but also has good stability and reliability, and can quickly and effectively fix the workpiece.

[0021] In summary, this application provides a wedge-shaped clamping plate for holding sheet metal, employing a dovetail joint connection to increase the stability of the tooling connection. It is highly versatile; utilizing its wedge-shaped structure, it can limit and clamp the sides of parts of any size. Especially for large parts that cannot be clamped by a vise, it can maximize the space of the machine tool table, solving the need for side clamping of parts. The tooling is lightweight, easy to disassemble and loosen, has low cost, and can be reused, among other advantages. This tooling and part clamping method are widely applicable.

Claims

1. A wedge-shaped pressure plate for clamping sheet metal, characterized in that, The wedge-shaped pressure plate (1) includes a hexagonal nut (1-1), a washer (1-2), an upper slider (1-3), a lower slider (1-4), and an anchor bolt (1-5), wherein: The upper slider (1-3) and the bottom dovetail groove rail (1-3-1) are at a 45-degree angle to the upper surface, with a waist-shaped groove in the middle. The groove width is 0.5mm wider than the diameter of the anchor bolt (1-5). The dovetail groove rail (1-3-1) is dovetail-shaped. The bottom surface of the lower slider (1-4) is at a 45-degree angle to the lower slider groove (1-4-1). The bottom spline (1-4-3) is connected to the keyway of the worktable (4) for positioning and stabilization. The dovetail groove (1-3-1) is dovetail shaped.

2. The wedge-shaped pressure plate according to claim 1, characterized in that, Nut (1-1) Internal thread.

3. The wedge-shaped pressure plate according to claim 1, characterized in that, The tensile strength of the external thread of the anchor bolts (1-5) shall not be less than 400 MPa.

4. The wedge-shaped pressure plate according to claim 1, characterized in that, The width of the waist-shaped groove of the upper slider (1-3) is 0.5mm greater than the diameter of the anchor bolt (1-5), and the wall thickness at both ends in the length direction is not less than 3mm. The dovetail groove tip is blunted with R0.

3.

5. The wedge-shaped pressure plate according to claim 1, characterized in that, The central hole (1-4-2) of the lower slider (1-4) is 0.5mm larger than the diameter of the anchor bolt (1-5). The width of the lower spline and the size of the worktable positioning groove (4-2) are interference fit. The dovetail groove tip is blunted with R0.

3.

6. The wedge-shaped pressure plate according to claim 1, characterized in that, The dovetail groove connection between the upper slider (1-3) and the lower slider (1-4) adopts a clearance fit, allowing them to slide freely in a free state.

7. The wedge-shaped pressure plate according to claim 1, characterized in that, The effective length of the external thread of the anchor bolt (1-5) shall not be less than half the length of the bolt.

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