Pneumatic expansion mechanism for vertical machining center

Abstract

The pneumatic expansion mechanism for the vertical machining center relates to the technical field of vertical machining centers and comprises a base, sliding grooves are formed in the four sides of the top end of the base, expansion clamps are connected to the inner walls of the sliding grooves in a sliding mode, and telescopic grooves are formed in the tops of one ends of the outer sides of the expansion clamps. A first spring is fixedly connected to one end of the inner side of the telescopic groove, a clamping column is fixedly connected to one end of the outer side of the first spring, a push plate is fixedly connected to the top end of the clamping column, a through hole is formed in the top end of the telescopic groove in a penetrating mode, and the push plate is arranged on the inner wall of the through hole. The effects that the clamping force of the expansion clamp is prevented from being reduced after the expansion clamp is used for a long time, and then the service life of the expansion clamp is prevented from being influenced are achieved, and the problems that the clamping force of the expansion clamp is reduced, cracks occur and the like when a traditional pneumatic expansion mechanism is used for a long time, and the service life of the expansion clamp is influenced are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical machining centers, in particular to a pneumatic expansion mechanism for vertical machining centers. Background Art

[0002] A vertical machining center is a CNC machine tool whose spindle is perpendicular to the worktable and the workpiece is fixed on the worktable for processing. A vertical machining center usually has the function of multi-axis linkage and can process complex parts, such as milling, drilling, tapping and other processes. During the processing, a pneumatic expansion mechanism is required to clamp and fix the workpiece;

[0003] At present, the pneumatic clamping mechanism on the market will generate a large friction force when clamping the workpiece, which leads to a slow clamping speed, thus affecting production efficiency. In addition, the clamping clamp needs to clamp and release the workpiece during operation, which will cause friction between the clamp surface and the workpiece, thus causing wear. Long-term use will reduce the clamping force of the clamp, make the clamp surface rough, and even cause cracks, which will affect the service life of the clamp.

[0004] To this end, this case proposes a pneumatic expansion mechanism for a vertical machining center to solve the above technical problems. Utility Model Content

[0005] The main purpose of the utility model is to provide a pneumatic expansion mechanism for a vertical machining center, which can effectively solve the technical problems in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A pneumatic expansion mechanism for a vertical machining center comprises a base, wherein four sides of the top of the base are provided with slide grooves, an expansion clamp is slidably connected to the inner wall of the slide groove, a telescopic groove is provided at the top of the outer end of the expansion clamp, a first spring is fixedly connected to the inner end of the telescopic groove, a clamping column is fixedly connected to the outer end of the first spring, a push plate is fixedly connected to the top of the clamping column, a through hole is passed through the top of the telescopic groove, the push plate is arranged on the inner wall of the through hole, T-shaped columns are fixedly connected to both sides of the outer end of the expansion clamp, an outer shell plate is arranged on the expansion clamp, T-shaped slots are provided on both sides of the inner end of the outer shell plate, the T-shaped slot and the T-shaped column are matched in shape, and a clamping slot is provided at the top of the inner end of the outer shell plate.

[0008] As a further solution of the utility model, a fixing plate is fixedly connected to the four sides of the top of the base, an inner end of the fixing plate is fixedly connected to a second spring, and an inner end of the second spring is fixedly connected to the bottom of an outer end of the expansion clamp.

[0009] As a further solution of the utility model, a circular groove is opened in the middle of the top of the base, the bottom end of the circular groove is fixedly connected to an electric cylinder, the driving end of the electric cylinder is fixedly connected to a top column, and the outer wall of the top column is arranged on the inner wall of the circular groove.

[0010] As a further solution of the utility model, a slope surface is arranged on the top of the outer wall of the top column, a plurality of evenly arranged placement grooves are opened on the slope surface, and balls are arranged on the inner walls of the placement grooves.

[0011] As a further solution of the utility model, one end of the inner side of the expansion clamp is arranged as a slope surface, and the ball rises and contacts the slope surface.

[0012] As a further solution of the utility model, a cover plate is fixedly connected to the top of the base, a hole is penetrated through the top of the cover plate, and the width of the hole is equal to the width of the slide groove.

[0013] The beneficial effects of the utility model are as follows:

[0014] Through the cooperation of the electric cylinder, the top column, the ball and the sloped surface on the expansion clamp, the friction between the top column and the expansion clamp can be reduced, thereby increasing the expansion speed of the expansion clamp and preventing the processing efficiency from being affected;

[0015] In addition, through the cooperation of the push plate, the clamping column, the clamping slot, the telescopic slot, the T-slot, the T-column and the first spring, the outer shell plate can be replaced quickly, and the expansion clamp can be protected by the outer shell plate, thereby preventing the clamping force of the expansion clamp from decreasing after a long time, thereby avoiding affecting the service life of the expansion clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of a pneumatic expansion mechanism for a vertical machining center of the utility model;

[0017] Figure 2 for Figure 1 A magnified view of middle;

[0018] Figure 3 This is a diagram showing the internal structure of a base of a pneumatic expansion mechanism for a vertical machining center according to the utility model;

[0019] Figure 4 This is a cross-sectional view of the base of a pneumatic expansion mechanism for a vertical machining center of the utility model;

[0020] Figure 5 This is a disassembled diagram of a pneumatic expansion mechanism for a vertical machining center of the utility model;

[0021] Figure 6The utility model is a cross-sectional view of an expansion clamp of a pneumatic expansion mechanism for a vertical machining center.

[0022] In the figure: 1. base; 2. telescopic slot; 3. expansion clamp; 4. outer shell plate; 5. fixing plate; 6. cover plate; 7. T-shaped column; 8. push plate; 9. first spring; 10. through hole; 11. second spring; 12. slide groove; 13. top column; 14. ball bearing; 15. circular groove; 16. electric cylinder; 17. placement groove; 18. T-shaped slot; 19. clamping slot; 20. clamping column. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] like Figure 1-6 As shown, a pneumatic expansion mechanism for a vertical machining center includes a base 1, a slide groove 12 is opened on the four sides of the top of the base 1, an expansion clamp 3 is slidably connected to the inner wall of the slide groove 12, a telescopic groove 2 is opened on the top of the outer end of the expansion clamp 3, a first spring 9 is fixedly connected to the inner end of the telescopic groove 2, a clamping column 20 is fixedly connected to the outer end of the first spring 9, a push plate 8 is fixedly connected to the top of the clamping column 20, a through hole 10 is penetrated at the top of the telescopic groove 2, the push plate 8 is arranged on the inner wall of the through hole 10, and the push plate 8 is limited by the through hole 10, T-shaped columns 7 are fixedly connected to both sides of the outer end of the expansion clamp 3, a shell plate 4 is arranged on the expansion clamp 3, T-shaped grooves 18 are opened on both sides of the inner end of the shell plate 4, the T-shaped grooves 18 and the T-shaped columns 7 are matched in shape, and a clamping groove 19 is opened on the top of the inner end of the shell plate 4;

[0025] The push plate 8 is pushed inwardly to move the card column 20 inwardly, so that the card column 20 leaves the range of the card slot 19 and shrinks into the telescopic slot 2. At this time, the shell plate 4 is pulled up to separate it from the expansion clamp 3, so that a new shell plate 4 can be replaced, and the T-slot 18 is sleeved on the T-column 7 and squeezed downward. Since the outer end of the card column 20 is set as a slope surface, the card column 20 can be retracted into the telescopic slot 2 when moving downward. After the shell plate 4 is installed, under the reset action of the first spring 9, the card column 20 is stuck in the card slot 19 to complete the limiting of the shell plate 4. Therefore, the shell plate 4 can be quickly replaced, and the expansion clamp 3 is protected by the shell plate 4, so that the clamping force of the expansion clamp 3 can be prevented from decreasing after a long time, thereby avoiding affecting the service life of the expansion clamp 3.

[0026] In this embodiment, the four sides of the top of the base 1 are fixedly connected with a fixing plate 5, an inner end of the fixing plate 5 is fixedly connected with a second spring 11, and an inner end of the second spring 11 is fixedly connected to the bottom of an outer end of the expansion clamp 3;

[0027] When the workpiece needs to be released from the limit, the second spring 11 pushes the expansion clamp 3 to move inward, thereby releasing the limit fixation of the workpiece.

[0028] In this embodiment, a circular groove 15 is provided in the middle of the top of the base 1, an electric cylinder 16 is fixedly connected to the bottom of the circular groove 15, a top column 13 is fixedly connected to the driving end of the electric cylinder 16, an outer wall of the top column 13 is arranged on the inner wall of the circular groove 15, a slope surface is provided on the top of the outer wall of the top column 13, a plurality of evenly arranged placement grooves 17 are provided on the slope surface, a ball 14 is provided on the inner wall of the placement groove 17, an inner end of the expansion clamp 3 is provided with a slope surface, and the ball 14 rises and contacts the slope surface;

[0029] By starting the electric cylinder 16 to move the top column 13 upward, the ball 14 will contact the slope surface on the expansion clamp 3 during the rising process, and the ball 14 will roll during the rising process of the top column 13, thereby reducing the friction between the top column 13 and the expansion clamp 3, thereby increasing the expansion speed of the expansion clamp 3 and preventing the processing production efficiency from being affected.

[0030] In this embodiment, a cover plate 6 is fixedly connected to the top of the base 1, and a hole is formed on the top of the cover plate 6, and the width of the hole is equal to the width of the slide groove 12;

[0031] The cover plate 6 is covered on the base 1 to seal the redundant chute 12 .

[0032] It should be noted that the utility model is a pneumatic expansion mechanism for a vertical machining center. When in use, the electric cylinder 16 is started to move the top column 13 upward, and the ball 14 will contact the slope surface on the expansion clamp 3 during the rising process, and the ball 14 will roll during the rising process of the top column 13, so that the friction between the top column 13 and the expansion clamp 3 can be reduced, thereby increasing the expansion speed of the expansion clamp 3 and preventing the processing production efficiency from being affected;

[0033] After using for a period of time, the push plate 8 is pushed inward to move the card column 20 inward, so that the card column 20 leaves the range of the card slot 19 and shrinks into the telescopic slot 2. At this time, the shell plate 4 is pulled up to separate it from the expansion clamp 3, so that a new shell plate 4 can be replaced, and the T-slot 18 is sleeved on the T-column 7 and squeezed downward. Since the outer end of the card column 20 is set as a slope surface, the card column 20 can be retracted into the telescopic slot 2 when moving downward. After the shell plate 4 is installed, under the resetting action of the first spring 9, the card column 20 is stuck into the card slot 19, completing the limiting of the shell plate 4, so that the shell plate 4 can be quickly replaced, and the expansion clamp 3 is protected by the shell plate 4, so that the clamping force of the expansion clamp 3 can be prevented from decreasing after a long time, thereby avoiding affecting the service life of the expansion clamp 3.

[0034] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A pneumatic expansion mechanism for a vertical machining center, comprising a base (1), characterized in that: The top four sides of the base (1) are provided with sliding grooves (12), the inner wall of the sliding groove (12) is slidably connected with an expansion clamp (3), the top of the outer end of the expansion clamp (3) is provided with a telescopic groove (2), the inner end of the telescopic groove (2) is fixedly connected with a first spring (9), the outer end of the first spring (9) is fixedly connected with a clamping column (20), the top of the clamping column (20) is fixedly connected with a push plate (8), the top of the telescopic groove (2) is penetrated with a through hole (10), the push plate (8) is arranged on the inner wall of the through hole (10), the outer end of the expansion clamp (3) is fixedly connected with T-shaped columns (7), the expansion clamp (3) is provided with a shell plate (4), the inner end of the shell plate (4) is provided with T-shaped grooves (18) on both sides, the T-shaped grooves (18) and the T-shaped columns (7) are matched in shape, and the top of the inner end of the shell plate (4) is provided with a clamping groove (19).

2. The pneumatic expansion mechanism for a vertical machining center according to claim 1, characterized in that: The four sides of the top of the base (1) are fixedly connected to a fixing plate (5), an inner end of the fixing plate (5) is fixedly connected to a second spring (11), and an inner end of the second spring (11) is fixedly connected to the bottom of an outer end of the expansion clamp (3).

3. The pneumatic expansion mechanism for a vertical machining center according to claim 1, characterized in that: A circular groove (15) is provided in the middle of the top of the base (1), the bottom end of the circular groove (15) is fixedly connected to an electric cylinder (16), the driving end of the electric cylinder (16) is fixedly connected to a top column (13), and the outer wall of the top column (13) is arranged on the inner wall of the circular groove (15).

4. The pneumatic expansion mechanism for a vertical machining center according to claim 3, characterized in that: The top of the outer wall of the top column (13) is provided with a slope surface, a plurality of evenly arranged placement grooves (17) are opened on the slope surface, and the inner wall of the placement groove (17) is provided with a ball (14).

5. The pneumatic expansion mechanism for a vertical machining center according to claim 4, characterized in that: One end of the inner side of the expansion clamp (3) is arranged as a slope surface, and the ball (14) rises and contacts the slope surface.

6. The pneumatic expansion mechanism for a vertical machining center according to claim 1, characterized in that: A cover plate (6) is fixedly connected to the top of the base (1), and a hole is formed through the top of the cover plate (6), wherein the width of the hole is equal to the width of the slide groove (12).

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