A wedge lateral positioning and clamping device for milling machine frame of numerical control machine tool

Abstract

A wedge-type lateral positioning and clamping device for a CNC machine tool milling machine frame relates to the field of machine tool fixture technology. It addresses the problem of low positioning accuracy and consequently low machining efficiency caused by damage to the lower surface during clamping in traditional clamping methods. The upper surface of the base 2 is machined with an inclined surface, and a positioning and clamping block 1 is located above the base 2. The lower surface of the positioning and clamping block 1 is also machined with an inclined surface. The lower surface of the positioning and clamping block 1 is slidably connected to the upper surface of the base 2. A threaded hole is machined at the center of the upper surface of the base 2, and a countersunk waist-shaped through hole is machined at the center of the upper surface of the positioning and clamping block 1. The bottom end of the locking bolt 3 passes through the countersunk waist-shaped through hole of the positioning and clamping block 1 and then connects to the threaded hole on the base 2. This utility model is applicable to the field of machine tool fixtures.

Description

Technical Field

[0001] This invention relates to the field of machine tool fixture technology, and specifically to a wedge-shaped lateral positioning and clamping device for a CNC machine tool milling frame. Background Technology

[0002] Currently, in the manufacturing of megawatt-class thermal and nuclear power units, the requirements for positioning accuracy, geometric tolerances, and surface quality of the unit frame are much higher due to the more complex structure and larger dimensions. When machining the frame on a CNC milling machine, the frame is first placed on leveling shims on the machine bed, aligned, and then bolted and clamped to the upper surface of the frame using bolts and pressure plates. Because the pressure plates press against the upper surface of the frame, the traditional clamping method has the following problems:

[0003] Firstly, flat surface clamping damage: When the clamping plate is used to directly clamp the upper surface of the frame, the clamping force will cause micro-deformation in thin-walled or insufficiently rigid areas. After milling, the stress is released, which causes the flatness to exceed the tolerance.

[0004] Secondly, the positioning accuracy is low: the sides of the frame are mostly non-machined surfaces with irregular shapes, making it difficult for ordinary fixtures to achieve fast and accurate positioning.

[0005] Thirdly, it is inefficient: traditional bolt tightening requires multiple adjustments, which takes up valuable machine tool processing time. Summary of the Invention

[0006] To address the problem that traditional clamping methods cause damage to the lower plane during clamping, resulting in low clamping accuracy and consequently low processing efficiency, this invention proposes a wedge-type lateral positioning and clamping device for CNC machine tool milling frames.

[0007] The present invention provides a wedge iron lateral positioning and clamping device for milling machine frame of CNC machine tool, which comprises a positioning and clamping pressure block 1, a base 2 and a locking bolt 3;

[0008] The upper surface of the base 2 is machined with an inclined surface, and a positioning clamping block 1 is provided above the base 2. The lower surface of the positioning clamping block 1 is also machined with an inclined surface. The lower surface of the positioning clamping block 1 is slidably connected to the upper surface of the base 2. A threaded hole is machined in the center of the upper surface of the base 2. A countersunk waist-shaped through hole is machined in the center of the upper surface of the positioning clamping block 1. The bottom end of the locking bolt 3 passes through the countersunk waist-shaped through hole of the positioning clamping block 1 and then connects with the threaded hole on the base 2.

[0009] Furthermore, a connecting block is provided on each of the two side end faces of the base 2;

[0010] Furthermore, the two connecting blocks are integrally formed with the base 2;

[0011] Furthermore, each connecting block has a countersunk through hole machined at the center of its upper surface;

[0012] Furthermore, the side end face of the positioning clamping block 1 is machined with anti-slip texture;

[0013] Furthermore, the tilt angle of the inclined surface on the base 2 is the same as the tilt angle of the inclined surface on the positioning clamping block 1.

[0014] Furthermore, the inclination angle of the inclined surface on the base 2 is 25°~60°;

[0015] Furthermore, during use, first place the base 2 on a level shim on the machine tool worktable, ensuring that the height of the shim is less than the height of the base; then, use two anchor bolts to insert into the countersunk holes of the connecting block on the base 2 and fix it to the machine tool worktable; finally, place the positioning clamping block 1 on the upper end face of the base 2 and tighten the locking bolt 3. The lower surface of the positioning clamping block 1 and the upper surface of the base 2 are slidably connected, so that the front end face of the positioning clamping block 1 generates a clamping force with the workpiece.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] This invention overcomes the shortcomings of existing technologies by using an inclined surface machined on the upper surface of the base, and a positioning clamping block is provided above the base. The lower surface of the positioning clamping block is also machined with an inclined surface. The lower surface of the positioning clamping block is slidably connected to the upper surface of the base. With the vertical downward locking force of the locking bolt, the front end of the positioning clamping block generates a horizontal clamping force to eliminate the gap between the frame and the positioning surface. Furthermore, the vertical downward locking force of the locking bolt can effectively suppress the vibration generated during cutting during processing, reducing the amplitude by 82%.

[0018] After the locking bolts are tightened, the positioning clamping block and the base will slide relative to each other, so that the front end of the positioning clamping block contacts the outer surface of the workpiece to generate clamping force, thereby applying the clamping force to the outer surface of the workpiece, so that the upper surface of the workpiece is in an open and free processing state, avoiding the phenomenon of clamping damage to the processing surface.

[0019] According to experimental data, the flatness of the workpiece clamped by this type of clamping device can reach 0.02~0.035mm / meter, which is much smaller than that of traditional clamping fixtures, thereby improving the positioning accuracy of clamping and greatly improving the processing efficiency. Attached Figure Description

[0020] Figure 1 This is a front view of a wedge-shaped lateral positioning and clamping device for a CNC machine tool milling frame, as described in this invention.

[0021] Figure 2This is a top view of a wedge-shaped lateral positioning and clamping device for a CNC machine tool milling frame, as described in this invention.

[0022] Figure 3 yes Figure 2 A cross-sectional view of AA in a wedge-shaped lateral positioning and clamping device for a CNC machine tool milling frame, as described in this invention;

[0023] Figure 4 yes Figure 2 A cross-sectional view of BB in a wedge-shaped lateral positioning and clamping device for a CNC machine tool milling frame according to the present invention;

[0024] Figure 5 This is a three-dimensional structural schematic diagram of a wedge iron lateral positioning and clamping device for a CNC machine tool milling frame, as described in this invention. Detailed Implementation

[0025] Specific implementation method one: Combining Figures 1 to 5 This embodiment describes a wedge-shaped lateral positioning and clamping device for a CNC machine tool milling frame, which comprises a positioning and clamping block 1, a base 2, and a locking bolt 3.

[0026] The upper surface of the base 2 is machined with an inclined surface, and a positioning clamping block 1 is provided above the base 2. The lower surface of the positioning clamping block 1 is also machined with an inclined surface. The lower surface of the positioning clamping block 1 is slidably connected to the upper surface of the base 2. A threaded hole is machined in the center of the upper surface of the base 2. A countersunk waist-shaped through hole is machined in the center of the upper surface of the positioning clamping block 1. The bottom end of the locking bolt 3 passes through the countersunk waist-shaped through hole of the positioning clamping block 1 and then connects with the threaded hole on the base 2.

[0027] In this specific embodiment, the upper surface of the base is machined with an inclined surface, and a positioning clamping block is provided above the base. The lower surface of the positioning clamping block is also machined with an inclined surface. The lower surface of the positioning clamping block is slidably connected to the upper surface of the base. With the vertical downward locking force of the locking bolt, the front end of the positioning clamping block generates a horizontal clamping force to eliminate the gap between the frame and the positioning surface. Furthermore, since the locking force of the locking bolt is vertically downward, it can effectively suppress the vibration generated by cutting during the machining process, reducing the amplitude by 82%.

[0028] After the locking bolts are tightened, the positioning clamping block and the base will slide relative to each other, causing the front end of the positioning clamping block to contact the outer surface of the workpiece to generate a clamping force. This clamping force is applied to the outer surface of the workpiece, so that the upper surface of the workpiece is in an open and free processing state, avoiding the phenomenon of clamping damage to the processing surface.

[0029] Specific Implementation Method Two: Combining Figures 1 to 5This embodiment further defines the clamping device described in Specific Embodiment 1. The wedge iron lateral positioning clamping device for CNC machine tool milling frame described in this embodiment has a connecting block on each of the two side end faces of the base 2.

[0030] Specific implementation method three: Combining Figures 1 to 5 This embodiment further defines the clamping device described in Specific Embodiment Two. In this embodiment, a wedge-shaped lateral positioning clamping device for a CNC machine tool milling frame is provided, wherein the two connecting blocks are integrally formed with the base 2.

[0031] Specific implementation method four: Combination Figures 1 to 5 This embodiment further defines the clamping device described in Specific Embodiment 3. In this embodiment, a wedge-shaped lateral positioning clamping device for a CNC machine tool milling frame is provided, wherein each connecting block has a countersunk through hole machined at the center of its upper surface.

[0032] Specific Implementation Method Five: Combining Figures 1 to 5 This embodiment further defines the clamping device described in Specific Embodiment 1. The wedge-shaped lateral positioning clamping device for milling machine frame of CNC machine tool described in this embodiment has anti-slip textures machined on the side end face of the positioning clamping block 1.

[0033] In this specific embodiment, the side end face of the positioning clamping block 1 is machined with anti-slip texture to avoid slippage between the side end face of the positioning clamping block 1 and the workpiece.

[0034] Specific Implementation Method Six: Combination Figures 1 to 5 This embodiment further defines the clamping device described in Specific Embodiment 1. In this embodiment, the inclined angle of the inclined surface on the base 2 is the same as the inclined angle of the inclined surface on the positioning and clamping block 1.

[0035] Specific implementation method seven: Combination Figures 1 to 5 This embodiment further defines the clamping device described in Specific Embodiment Six. In this embodiment, the inclined angle of the inclined surface on the base 2 of the CNC machine tool milling frame for lateral positioning and clamping of wedge iron is 25°~60°.

[0036] Specific implementation method eight: Combination Figures 1 to 5 This embodiment further defines the clamping device described in Specific Embodiment 1. The wedge-type lateral positioning clamping device for a CNC machine tool milling frame described in this embodiment, when in use...

[0037] Milling parameters: depth of cut 5mm, feed rate 800mm / min;

[0038] Test results: The flatness of the upper surface of the frame is 0.02 mm / m (meets the Ra0.8 requirement);

[0039] Clamping time: ≤3 minutes (70% shorter than traditional methods);

[0040]

[0041] Working principle

[0042] In use, first place the base 2 on the machine tool worktable and ensure that the height of the shim is less than the height of the base; then, use two anchor bolts to insert into the countersunk holes of the connecting block on the base 2 and fix it to the machine tool worktable; finally, place the positioning clamping block 1 on the upper end surface of the base 2 and tighten the locking bolt 3. The lower surface of the positioning clamping block 1 and the upper surface of the base 2 are slidably connected, so that the front end face of the positioning clamping block 1 generates a clamping force with the workpiece.

Claims

1. A wedge side positioning clamping device for a milling machine frame of a numerical control machine tool, characterized in that: It includes a positioning clamping block (1), a base (2), and a locking bolt (3); The upper surface of the base (2) is machined with an inclined surface, and a positioning clamping block (1) is provided above the base (2). The lower surface of the positioning clamping block (1) is also machined with an inclined surface. The lower surface of the positioning clamping block (1) is slidably connected to the upper surface of the base (2). A threaded hole is machined in the center of the upper surface of the base (2). A countersunk waist-shaped through hole is machined in the center of the upper surface of the positioning clamping block (1). The bottom end of the locking bolt (3) passes through the countersunk waist-shaped through hole of the positioning clamping block (1) and connects with the threaded hole on the base (2).

2. A wedge side positioning clamping device for milling machine frame of CNC machine tool according to claim 1, characterized in that: The base (2) has a connecting block on each of its two side ends.

3. The wedge-shaped lateral positioning and clamping device for a CNC machine tool milling frame according to claim 2, characterized in that: The two connecting blocks are integrated with the base (2).

4. A wedge side positioning clamping device for milling machine frame of CNC machine tool according to claim 3, characterized in that: Each connecting block has a countersunk through hole machined at the center of its upper surface.

5. The wedge side positioning and clamping device for milling machine frame of CNC machine tool according to claim 1, characterized in that: The side end face of the positioning clamping block (1) is machined with anti-slip texture.

6. A wedge side positioning clamping device for milling machine frame of CNC machine tool according to claim 1, characterized in that: The tilt angle of the inclined surface on the base (2) is the same as the tilt angle of the inclined surface on the positioning clamping block (1).

7. A wedge side positioning clamping device for a milling machine frame of a numerically controlled machine tool according to claim 6, characterized in that: The inclination angle of the inclined surface on the base (2) is 25°~60°.

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