A replaceable fixture milling machine table positioning device

Abstract

The utility model discloses a kind of milling machine workbench positioning devices of replaceable clamp, including workbench, multiple groups of sliding slots are opened in the workbench, two groups of block body one and two groups of block body two are slidably connected in part sliding slot, multiple groups of block body two are respectively adhered to corresponding block body one, multiple groups of block body two one end are all thread connected with stud, multiple groups of plate body are equipped on the workbench, and multiple groups of plate body are all opened with groove body.The utility model moves two groups of block body along sliding slot, can drive plate body to adjust to with clamp bottom mounting seat matching position, the clamp of different size, mounting position is adapted, and the compatibility of multiple specifications is improved.Moving plate body makes one end to clamp mounting seat, the other end to pad block, form bidirectional support, even power transmission avoids clamp single-point stress or suspended instability, enhances processing stability.Pad block stepped design provides multiple height selection, without frequent replacement pad block, reduce downtime waiting, and the applicability is wider.

Description

Technical Field

[0001] This utility model relates to the technical field of milling machines, and in particular to a milling machine table positioning device with replaceable fixtures. Background Technology

[0002] Milling machines primarily utilize the rotational motion of the milling cutter. A motor drives the spindle to rotate the milling cutter at high speed, while the workpiece mounted on the worktable or indexing head performs feed motion. Through the relative motion between the milling cutter and the workpiece, excess material on the workpiece surface is removed, enabling various machining operations such as planar machining, groove machining, gear machining, thread machining, and curved surface machining.

[0003] In milling, a stable connection between the fixture and the worktable is crucial for ensuring machining accuracy. Currently, the industry commonly uses a block-and-bolt fixing method. The vise, as a typical fixture, exemplifies this mechanism's operational logic through its installation process. First, the operator must precisely position the vise within the pre-defined machining area of ​​the worktable, ensuring the vise's reference surface is parallel or perpendicular to the worktable's positioning reference. Next, the matching T-block is slidably adjusted along the T-slot on the worktable surface. During this process, the T-block simultaneously moves the rigidly connected stud and positioning block until the block slides into the pre-defined slot on the vise's side. This slot is typically designed with a rectangular or trapezoidal cross-section, ensuring smooth block insertion while restricting the vise's horizontal displacement. Once the block is aligned with the vise slot, the operator tightens the nut at the top of the stud with a wrench. The nut exerts a downward clamping force on the block, which is transmitted through the block to the vise's side, ultimately resulting in a stable, rigid fixation of the vise on the worktable surface. However, the overall dimensions of this fixing device are fixed, meaning that key parameters such as the length of the T-block, the diameter and height of the stud, and the thickness and width of the positioning block are all standardized values ​​and cannot be adjusted according to the structural characteristics of different fixtures. For example, when fixing small special-purpose fixtures, if standard-sized blocks and bolts are used, the large size of the blocks may restrict the operating space around the fixture, affecting tool changing or workpiece measurement. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a milling machine table positioning device with replaceable fixtures.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A milling machine table positioning device with replaceable fixtures includes a worktable with multiple sets of sliding grooves. Two sets of blocks I and two sets of blocks II are slidably connected in some of the sliding grooves. The multiple sets of blocks II are respectively fitted with corresponding blocks I. Each set of blocks II is threaded with a stud at one end. The worktable is provided with multiple sets of plates, each set of plates having a groove. The multiple sets of grooves are respectively movably connected to corresponding studs. Each set of studs is threaded with a nut I. Multiple sets of pads are fitted on the worktable, and each set of pads has a stepped end.

[0006] Preferably, each of the multiple sets of blocks has a bolt threadedly connected to one end and the other end, and the multiple sets of bolts are respectively threadedly connected to the corresponding block.

[0007] Preferably, all of the multiple sets of grooves are inverted T-shaped and fit into block one and block two.

[0008] Preferably, all of the bolts in the multiple sets are provided with prismatic holes.

[0009] Preferably, both the first and second sets of blocks are made of gray cast iron.

[0010] Preferably, each of the multiple sets of studs is threadedly connected to a second nut, and each of the multiple sets of second nuts is respectively engaged with a corresponding first nut.

[0011] Preferably, one end of each of the multiple sets of plates is connected to a rubber pad.

[0012] The beneficial effects of this utility model are as follows: 1. Through the cooperation between the set worktable, studs, and pads, the plate can be synchronously adjusted to match the bottom mounting base of the fixture by moving two sets of blocks along the slide groove. This allows for adaptation to fixtures of different sizes and installation positions, improving the device's compatibility with multi-specification fixtures. Moving the plate so that one end fits against the bottom mounting base of the fixture and the other end fits against the corresponding position of the pad forms a two-way support structure of fixture, plate, and pad. The plate can evenly transfer the force of the fixture to the pad and worktable, avoiding instability caused by single-point force or suspension of the fixture, further improving the stability during processing. The stepped design at one end of the pad provides multiple height options. For fixture mounting bases of different thicknesses, there is no need to frequently change pads of different specifications. Simply select the corresponding stepped surface of the pad to fit the plate according to the thickness of the mounting base to meet the support requirements. This reduces downtime caused by mismatched pad specifications and has a wide range of applicability. 2. By utilizing the fit between Block 1, Block 2, and the bolt, when Block 1 or Block 2 is damaged, repairs can be performed as follows: First, rotate the stud to gradually disengage it from the threaded fit of Block 2. After the stud is completely disassembled, unscrew the bolt. Then, replace the damaged Block 1 or Block 2 individually without disassembling or replacing the entire structure. The modular connection design allows for targeted disassembly of the connecting parts related to the damaged component during repairs, eliminating the need to disassemble the entire structure. This shortens disassembly and assembly time to some extent, reduces the complexity of repair operations, and improves maintenance efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a milling machine worktable positioning device with replaceable fixtures proposed in this utility model; Figure 2 for Figure 1 Structural diagram of the workbench, pad block, and plate; Figure 3 for Figure 1 Schematic diagram of the structure of the intermediate worktable and slide; Figure 4 for Figure 1 Structural diagram of block one, bolts, and block two; Figure 5 for Figure 1 A schematic diagram of the structure of nut one, nut two, and the groove.

[0014] In the diagram: 1. Workbench; 2. Slide; 3. Block 1; 4. Block 2; 5. Bolt; 6. Stud; 7. Plate; 8. Groove; 9. Nut 1; 10. Nut 2; 11. Spacer; 12. Rubber pad. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] Example 1, referring to Figures 1 to 5A milling machine table positioning device with replaceable fixtures includes a table 1. Multiple sets of sliding grooves 2 are provided on the table 1. Two sets of first blocks 3 and two sets of second blocks 4 are slidably connected within some of the sliding grooves 2. Moving the first blocks 3 and second blocks 4 along the sliding grooves 2 moves a plate 7 to a corresponding position. The multiple sets of second blocks 4 respectively engage with corresponding first blocks 3. Each set of second blocks 4 has a stud 6 threaded to one end. Multiple sets of plates 7 are provided on the table 1. Moving a plate 7 so that one end engages with the bottom mounting base of the fixture, the other... The end of the plate 7 is fitted with the corresponding position of the pad 11. Each of the multiple plates 7 has a groove 8. Each of the multiple grooves 8 is movably connected to the corresponding stud 6. Each of the multiple stud 6 is threaded with a nut 9. Tightening the nut 9 makes it abut against the plate 7, thereby fixing the fixture. Multiple pads 11 are placed on the workbench 1. One end of each of the multiple pads 11 is stepped. The stepped design provides more height options. To a certain extent, it is not necessary to replace the pads 11 according to the thickness of the fixture mounting base, which makes it more widely applicable.

[0017] In this embodiment, multiple sets of blocks 4 are threaded to one end and the other end with bolts 5. These bolts 5 are threaded to corresponding blocks 3. Rotating the studs 6 disengages them from the threaded connection to blocks 4. After unscrewing the bolts 5, damaged blocks 3 or 4 can be replaced; complete replacement is not required when damaged. Multiple sets of sliding grooves 2 are inverted T-shaped and fit into blocks 3 and 4, providing guidance and vertical constraint. Multiple sets of bolts 5 have prismatic holes for easy tightening with tools. Both blocks 3 and 4 are made of gray cast iron. The high rigidity of gray cast iron can, to some extent, prevent plastic deformation such as bending and denting under stress, ensuring that the contact surfaces of the blocks remain flat and preventing workpiece positioning displacement due to block deformation. Multiple sets of studs 6 are threadedly connected to nuts 10. Each nut 10 engages with a corresponding nut 9. When tightened, nut 9 presses firmly against the edge of the groove 8 of the plate 7, while nut 10 presses firmly against nut 9 and applies force in the opposite direction. This creates a pre-tightening force between the threads of the two sets of nuts and the studs 6, which to some extent counteracts the tendency of the threads to loosen due to vibration. Each set of plates 7 has a rubber pad 12 connected to one end, increasing the friction with the clamps and pads 11, thus improving stability to some extent.

[0018] The working principle of this embodiment is as follows: During use, according to the size of the fixture to be installed and the position of the bottom mounting base, two sets of blocks 3 and two sets of blocks 4 are slid along multiple sets of sliding grooves 2 on the workbench 1. The sliding of the blocks drives multiple sets of plates 7 on the workbench 1 to move synchronously until the position of the plates 7 matches the preset installation position of the bottom mounting base of the fixture, laying the foundation for subsequent fixture fixing. The plates 7, which have been initially adjusted in position, are manually moved so that one end of the plates 7 is in contact with the bottom mounting base of the fixture, while ensuring that the other end of the plates 7 is in contact with the corresponding support position of the pad 11 placed on the workbench 1, forming a two-way support structure of fixture, plates 7, and pad 11, which to a certain extent avoids single-point stress or suspension after the fixture is installed. Since one end of block 2 4 is threadedly connected to stud 6, and plate 7 has a groove 8, after the position of plate 7 is determined, it is ensured that stud 6 moves precisely through the corresponding groove 8 of plate 7, making stud 6 a key component connecting block 2 4 and plate 7, providing structural support for subsequent locking and fixing. By tightening the nut 1 9 threaded on stud 6, nut 1 9 gradually abuts against the surface of plate 7. With the extrusion force between nut 1 9 and plate 7, plate 7 is firmly fixed in the current position. Thus, through the bidirectional support of plate 7, the fixture is stably fixed, preventing displacement of the fixture during milling. Utilizing the stepped design at one end of pad 11, the corresponding stepped surface on pad 11 is selected to fit against plate 7 according to the thickness of the mounting base at the bottom of the fixture. Through the multiple height options provided by the stepped structure, it is ensured that the support height of plate 7 for the fixture is adapted, further enhancing the stability of the fixture after installation and meeting the support requirements of fixtures of different thicknesses. If block 3 or block 4 is damaged, first rotate stud 6 to disengage it from the threaded connection with block 4, then unscrew bolt 5, disassemble and replace the damaged block 3 or block 4 separately, and after replacement, reverse the operation to reset. There is no need to replace the entire device, ensuring the continuous and stable operation of the device.

[0019] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A milling machine table positioning device with replaceable fixtures, comprising a table (1), characterized in that, The workbench (1) has multiple sets of sliding grooves (2). Two sets of blocks (3) and two sets of blocks (4) are slidably connected in some of the sliding grooves (2). The blocks (4) are respectively attached to the corresponding blocks (3). One end of each block (4) is threaded with a stud (6). The workbench (1) has multiple sets of plates (7). Each set of plates (7) has a groove (8). Each set of grooves (8) is movably connected to the corresponding stud (6). Each set of studs (6) is threaded with a nut (9). Multiple sets of pads (11) are attached to the workbench (1). One end of each set of pads (11) is stepped.

2. The milling machine table positioning device with replaceable fixtures according to claim 1, characterized in that, Each of the multiple sets of blocks two (4) has a bolt (5) threadedly connected to one end and the other end, and the bolts (5) are threadedly connected to the corresponding blocks one (3).

3. A milling machine table positioning device with replaceable fixtures according to claim 1, characterized in that, All of the aforementioned grooves (2) are inverted T-shaped and fit into block one (3) and block two (4).

4. A milling machine table positioning device with replaceable fixtures according to claim 2, characterized in that, All of the bolts (5) in the multiple sets are provided with prismatic holes.

5. A milling machine table positioning device with replaceable fixtures according to claim 1, characterized in that, Both the first (3) and the second (4) blocks are made of gray cast iron.

6. A milling machine table positioning device with replaceable fixtures according to claim 1, characterized in that, Each of the multiple sets of studs (6) is threadedly connected to a second nut (10), and each of the multiple sets of second nuts (10) is respectively fitted with a corresponding first nut (9).

7. A milling machine table positioning device with replaceable fixtures according to claim 1, characterized in that, Each of the multiple sets of plates (7) has a rubber pad (12) connected to one end.

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