A workpiece fixing fixture for a gantry machining center

Abstract

This utility model discloses a workpiece fixing fixture for a gantry machining center, specifically relating to the field of workpiece fixing technology. It includes a worktable with a fixing mechanism on top for fixing the workpiece and a support frame fixed at the bottom. The fixing mechanism includes two control boxes on the top of the worktable. Each control box has a first bidirectional threaded hole movably connected to it via bearings. Limit plates are threaded to both ends of the first bidirectional threaded hole. One side of the limit plate passes through and extends beyond one side of the control box. A first electric push rod is fixed to one side of each limit plate, and a support plate is fixed to one end of the first electric push rod. A rubber pad is provided on one side of the support plate. This utility model can fix the workpiece through the fixing mechanism, improving workpiece stability and extending its service life. Furthermore, the first threaded hole allows the rubber pad to be removed from the support plate for easy replacement, preventing any impact on stability.

Description

Technical Field

[0001] This utility model relates to the field of workpiece fixing technology, specifically to a workpiece fixing fixture for a gantry machining center. Background Technology

[0002] A gantry machining center is a machining center where the Z-axis of the spindle is perpendicular to the worktable. Its overall structure is a large machining center with a portal frame frame consisting of double columns and a top beam, with a crossbeam in the middle of the double columns. It is particularly suitable for machining large and complex-shaped workpieces. The worktable of a gantry machining center is basically rectangular. Large castings such as the worktable, bed, columns, crossbeam, and ram are made of cast iron or welded parts. The internal cavities of the castings have a honeycomb composite arrangement structure, an advanced design, and all undergo aging and secondary tempering treatments to eliminate residual internal stress, stabilize the material, and ensure stable workpiece machining accuracy and machine tool life.

[0003] For example, Chinese patent application No. 202221116020.1 discloses a workpiece clamping device for a gantry machining center, including a worktable. A gantry frame is movably mounted on one upper end of the worktable, and a clamping assembly is mounted on the other upper end of the worktable. A support frame is provided between the clamping assembly and the gantry frame, and the support frame is fixedly connected to the center of the upper side of the worktable. The clamping assembly includes a transmission component, and a fixed rod is fixedly connected to the center of the transmission component. The lower end of the fixed rod is fixedly connected to the upper end of the output shaft of a drive motor. The drive motor is connected to the lower side of one side of the worktable through a mounting bracket, and the output shaft of the drive motor is an electric telescopic rod. This technical solution solves the problem that the clamping range of the existing fixtures is limited and it is difficult to adjust them to match workpieces within a similar size range.

[0004] However, the following problems still exist in this technical solution: In this technical solution, the workpiece is clamped by two sets of clamping blocks driven by the connecting spring. However, after long-term use, the elastic potential energy of the spring will gradually decrease, and eventually it will be unable to fix the workpiece. Utility Model Content

[0005] The purpose of this utility model is to provide a workpiece fixing fixture for a gantry machining center. The fixing mechanism can fix the workpiece, improve the stability of the workpiece, and extend its service life. The rubber pad can also be removed from the support plate through the first threaded hole, making it easy to replace and avoiding affecting stability, thus solving the above-mentioned shortcomings in the technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a workpiece fixing fixture for a gantry machining center, including a worktable, a fixing mechanism for fixing the workpiece on the top of the worktable, and a support frame fixedly provided at the bottom of the worktable.

[0007] Preferably, the fixing mechanism includes two control boxes located on the top of the workbench. Each control box has a first bidirectional threaded hole movably connected to it via bearings. Limiting plates are threaded to both ends of the first bidirectional threaded hole. One side of the limiting plate passes through the control box and extends out of the control box. A first electric push rod is fixedly mounted on one side of each limiting plate. A support plate is fixedly mounted on one end of the first electric push rod. A rubber pad is mounted on one side of the support plate. The rear end of the first bidirectional threaded hole passes through the control box and extends out of the rear side of the control box. A first motor is fixedly mounted on the rear end of the first bidirectional threaded hole for fixing the workpiece.

[0008] Preferably, the support plate has second threaded holes on both sides, and the rubber pad has first threaded holes on both sides. The first and second threaded holes are connected by the same bolt for installing and removing the rubber pad.

[0009] Preferably, the top of the workbench is provided with a moving mechanism that drives the two control boxes to move. The moving mechanism includes two fixed plates on the top of the workbench. Each fixed plate has a second electric push rod on both sides of its top. The top of the second electric push rod is fixedly connected to the bottom of the control box. A second bidirectional threaded rod is movably connected to the inside of the workbench through a bearing. Both ends of the second bidirectional threaded rod are threadedly connected to a connecting plate. The top of the connecting plate passes through the workbench and extends beyond the top of the workbench. The top of the connecting plate is fixedly connected to the bottom of the fixed plate, which is used to drive the two control boxes to move.

[0010] Preferably, one end of the second bidirectional threaded rod passes through the worktable and extends out of one side of the worktable, and a second motor is fixedly installed at one end of the second bidirectional threaded rod extending out of the worktable to drive the second bidirectional threaded rod to rotate.

[0011] Preferably, the workbench is equipped with limit rods on both sides inside, and the limit rods pass through the connecting plate to limit the position of the connecting plate.

[0012] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0013] 1. Start the first motor, which can drive the first bidirectional threaded hole to rotate. The rotation of the first bidirectional threaded hole can drive the limit plate to move. The limit plate can drive the first electric push rod to move. Open the first electric push rod and move the support plate to one side of the workpiece. The support plate can fix the workpiece. Compared with the existing technology of fixing by spring, the fixing method of this utility model is more stable and has an increased service life.

[0014] 2. Rotate the bolt to unscrew it from the second and first threaded holes, then pull the rubber pad to remove it from the support plate for easy replacement and to avoid affecting stability. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a front view of the present invention;

[0017] Figure 2 This is a rear view of the present invention;

[0018] Figure 3 This is a schematic diagram of the fixing mechanism of this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the second electric push rod of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the moving mechanism of this utility model;

[0021] Figure 6 This is a schematic diagram of the support plate and rubber pad of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1 workbench;

[0024] 2. Fixing mechanism, 201. Control box, 202. First bidirectional threaded hole, 203. Limiting plate, 204. First electric push rod, 205. Support plate, 206. Rubber pad, 207. First threaded hole, 208. Second threaded hole, 209. Bolt, 210. First motor;

[0025] 3. Moving mechanism, 301. Fixed plate, 302. Second electric push rod, 303. Second bidirectional threaded rod, 304. Connecting plate, 305. Limiting rod, 306. Second motor;

[0026] 4. Support frame. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0028] This utility model provides, for example Figure 1-6 The workpiece fixing fixture shown is for a gantry machining center and includes a worktable 1. The top of the worktable 1 is provided with a fixing mechanism 2 for fixing the workpiece, and the bottom of the worktable 1 is fixed with a support frame 4. The fixing mechanism 2 includes two control boxes 201 located on the top of the worktable 1.

[0029] like Figure 5 As shown, the top of the workbench 1 is provided with a moving mechanism 3 that drives the two control boxes 201 to move. The moving mechanism 3 includes two fixed plates 301 on the top of the workbench 1. The top sides of the fixed plates 301 are provided with second electric push rods 302. The top of the second electric push rods 302 are fixedly connected to the bottom of the control boxes 201. The workbench 1 is movably connected to a second bidirectional threaded rod 303 through a bearing. Both ends of the second bidirectional threaded rod 303 are threadedly connected to a connecting plate 304. The top of the connecting plate 304 passes through the workbench 1 and extends out of the top of the workbench 1. The top of the connecting plate 304 is fixedly connected to the bottom of the fixed plate 301.

[0030] like Figure 5 As shown, one end of the second bidirectional threaded rod 303 passes through the workbench 1 and extends out of one side of the workbench 1. The second motor 306 is fixedly installed at one end of the second bidirectional threaded rod 303 extending out of one side of the workbench 1. Limiting rods 305 are provided on both sides inside the workbench 1. The limiting rods 305 pass through the connecting plate 304.

[0031] Place the workpiece on top of the workbench 1, start the second motor 306, the second motor 306 can drive the second bidirectional threaded rod 303 to rotate, the rotation of the second bidirectional threaded rod 303 can drive the connecting plate 304 to move, the movement of the connecting plate 304 can drive the limit rod 305 to slide upward, the limit rod 305 can limit the connecting plate 304 to prevent displacement, the movement of the connecting plate 304 can drive the fixed plate 301 to move, move the fixed plate 301 to one side of the workpiece, open the second electric push rod 302, use the second electric push rod 302 to drive the control box 201 to move, move the control box 201 to the middle position of the workpiece, so as to facilitate the support of the workpiece.

[0032] like Figure 3 , 6 As shown, each control box 201 has a first bidirectional threaded hole 202 movably connected inside through a bearing. The two ends of the first bidirectional threaded hole 202 are threadedly connected to a limit plate 203. One side of the limit plate 203 passes through the control box 201 and extends out of the control box 201. A first electric push rod 204 is fixedly provided on one side of each limit plate 203. A support plate 205 is fixedly provided at one end of the first electric push rod 204.

[0033] like Figure 3 , 6As shown, a rubber pad 206 is provided on one side of the support plate 205. The rear end of the first bidirectional threaded hole 202 passes through the control box 201 and extends out of the rear side of the control box 201. A first motor 210 is fixedly provided at the rear end of the first bidirectional threaded hole 202. A second threaded hole 208 is provided on both sides of the support plate 205. A first threaded hole 207 is provided on both sides of the rubber pad 206. The first threaded hole 207 and the second threaded hole 208 are connected by the same bolt 209.

[0034] The first motor 210 is started, which drives the first bidirectional threaded hole 202 to rotate. The rotation of the first bidirectional threaded hole 202 drives the limiting plate 203 to move. The limiting plate 203 drives the first electric push rod 204 to move. The first electric push rod 204 is opened, and the support plate 205 is moved to the side of the workpiece. The support plate 205 can fix the workpiece. The rubber pad 206 on one side of the support plate 205 is in contact with the workpiece. The rubber pad 206 can increase the friction between the support plate 205 and the workpiece, and improve stability. Compared with the spring-fixed method in the prior art, the fixing method of this utility model is more stable and has an increased service life.

[0035] Rubber pad 206 is prone to damage under prolonged friction. By rotating bolt 209 and turning it out of the second threaded hole 208 and the first threaded hole 207, and then pulling rubber pad 206, rubber pad 206 can be removed from support plate 205 for easy replacement and to avoid affecting stability.

[0036] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A workpiece fixing fixture for a gantry machining center, comprising a worktable (1), characterized in that: The workbench (1) is provided with a fixing mechanism (2) for fixing the workpiece at the top, and a support frame (4) is fixedly provided at the bottom of the workbench (1). The fixing mechanism (2) includes two control boxes (201) located on the top of the workbench (1). Each control box (201) has a first bidirectional threaded hole (202) connected to it via a bearing. The two ends of the first bidirectional threaded hole (202) are threadedly connected to a limiting plate (203). One side of the limiting plate (203) passes through the control box (201) and extends out of the control box (201). A first electric push rod (204) is fixedly provided on one side of each limiting plate (203). A support plate (205) is fixedly provided at one end of the first electric push rod (204). A rubber pad (206) is provided on one side of the support plate (205).

2. The workpiece fixing fixture for a gantry machining center according to claim 1, characterized in that: The rear end of the first bidirectional threaded hole (202) passes through the control box (201) and extends out of the rear side of the control box (201). The rear end of the first bidirectional threaded hole (202) is fixedly provided with a first motor (210).

3. The workpiece fixing fixture for a gantry machining center according to claim 1, characterized in that: The support plate (205) has a second threaded hole (208) on both sides, and the rubber pad (206) has a first threaded hole (207) on both sides. The first threaded hole (207) and the second threaded hole (208) are connected by the same bolt (209).

4. The workpiece fixing fixture for a gantry machining center according to claim 1, characterized in that: The top of the workbench (1) is provided with a moving mechanism (3) that drives the two control boxes (201) to move; The moving mechanism (3) includes two fixed plates (301) on the top of the workbench (1). The fixed plates (301) are provided with second electric push rods (302) on both sides of the top. The top of the second electric push rods (302) is fixedly connected to the bottom of the control box (201). The workbench (1) is movably connected to a second bidirectional threaded rod (303) through a bearing. Both ends of the second bidirectional threaded rod (303) are threadedly connected to a connecting plate (304). The top of the connecting plate (304) passes through the workbench (1) and extends out of the top of the workbench (1). The top of the connecting plate (304) is fixedly connected to the bottom of the fixed plate (301).

5. A workpiece fixing fixture for a gantry machining center according to claim 4, characterized in that: One end of the second bidirectional threaded rod (303) passes through the workbench (1) and extends out of one side of the workbench (1). The second motor (306) is fixedly installed at one end of the second bidirectional threaded rod (303) extending out of one side of the workbench (1).

6. A workpiece fixing fixture for a gantry machining center according to claim 4, characterized in that: The workbench (1) is equipped with limit rods (305) on both sides inside, and the limit rods (305) penetrate the connecting plate (304).

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