Boring shaft tail supporting structure of boring and milling main shaft unit

Abstract

The utility model discloses a boring spindle tail supporting structure of a boring and milling spindle unit, which comprises a plurality of flange hanging brackets, a guide rail fixing plate, a linear guide rail, a sliding block and a lead screw nut supporting seat, the flange hanging brackets are fixed in counter bores at the top of a ram, the flange hanging brackets are of circular truncated cone-shaped structures, and rectangular grooves are formed in the bottom surfaces of the flange hanging brackets; the guide rail fixing plate is connected into a rectangular groove of the flange hanging bracket through a fixing plate screw, a rectangular through groove is formed in the bottom face of the guide rail fixing plate, the linear guide rail is reversely connected into the rectangular through groove of the guide rail fixing plate through a guide rail screw, and the lead screw nut supporting seat is installed in an inner cavity of the tail portion of the ram. The ball screw is connected with the tail portion of the boring shaft through a lead screw nut supporting seat, a sliding block is connected to the top face of the lead screw nut supporting seat, and the sliding block is matched with the linear guide rail. The supporting rigidity of the tail of the boring shaft and the feeding straightness of the boring shaft can be effectively improved, and it is guaranteed that axial feeding movement of the boring shaft is fast, reliable and stable.

Description

Technical Field

[0001] The utility model belongs to the field of boring and milling machines, in particular to a boring spindle tail support structure of a boring and milling spindle unit. Background Art

[0002] For CNC horizontal boring and milling machines, the boring spindle feeds horizontally. As the boring spindle boring machining accuracy requirements become higher and higher, the straightness and positioning accuracy requirements for the boring spindle feed are also getting higher and higher. The front half of the boring spindle slides inside the milling spindle, and the rear part uses a linear guide for guidance and support. Limited by the size and structure of the slide, the installation base surface of the linear guide is difficult to machine in place, and traditional installation methods are difficult to implement. In the past, we used multi-point hanger installation, which lacked an effective mounting surface and a firm bolt connection. As a result, the structural rigidity and guiding accuracy of the linear guide could not play their due role, resulting in the boring spindle feed accuracy being affected, and ultimately affecting the spindle unit machining accuracy. Therefore, in order to ensure the straightness and positioning accuracy of the boring spindle feed, designing an effective support structure at the tail of the boring spindle is an urgent problem to be solved. Summary of the Invention

[0003] In order to overcome the shortcomings of the above-mentioned existing technologies, the utility model provides a new boring spindle tail support structure, which can effectively improve the support rigidity of the boring spindle tail and the boring spindle feed straightness, ensure the fast, reliable and smooth axial feed movement of the boring spindle, and improve the spindle feed speed and spindle accuracy of the CNC horizontal milling and boring machine.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a boring spindle tail support structure of a boring and milling spindle unit, including a flange hanger, a guide rail fixing plate, a linear guide rail, a slider, and a screw nut support seat, several of the flange hangers are fixed in the countersunk hole on the top of the slide, the flange hanger is a truncated cone structure, and a rectangular groove is provided on its bottom surface, the guide rail fixing plate is connected to the rectangular groove of the flange hanger by means of fixing plate screws, the bottom surface of the guide rail fixing plate is provided with a rectangular through groove, the linear guide is reversely connected to the rectangular through groove of the guide rail fixing plate by means of guide rail screws, the screw nut support seat is installed in the inner cavity of the slide tail, the ball screw is connected to the boring spindle tail through the screw nut support seat, a slider is connected to the top surface of the screw nut support seat, and the slider cooperates with the linear guide rail.

[0005] In the above technical solution, the number of the flange hangers is 4, and the 4 flange hangers are arranged at equal intervals in the long direction of the slide.

[0006] In the above technical solution, the cross-section of the guide rail fixing plate is a rectangular structure, and its width is adapted to the width of the rectangular groove on the bottom surface of the flange hanger. The width of the rectangular through groove on the bottom surface of the guide rail fixing plate is adapted to the width of the linear guide rail. There is a row of threaded holes arranged at equal intervals on one side of the guide rail fixing plate, and set screws for straightening the linear guide rail are installed in the threaded holes.

[0007] In the above technical solution, the number of the sliders is at least 2, and the slider is fixed on the top of the screw nut support seat and is adapted to the linear guide rail, and is a precision linear guide component.

[0008] In the above technical solution, a slider adjustment pad is provided between one side of the slider and the mounting surface of the screw nut support seat, and a wedge-shaped pressure block is provided between the other side thereof and the top inclined surface of the screw nut support seat.

[0009] In the above technical solution, a hanger adjustment pad is provided between the countersunk hole of the ram and the flange hanger.

[0010] The beneficial effects of the utility model are as follows: by installing the guide rail fixing plate under the flange hanger on the top of the slide, a mounting base surface and a support surface are provided for the linear guide rail for the axial feed guide of the boring spindle, which greatly improves the supporting rigidity and installation accuracy of the tail of the boring spindle, and improves the assembly processability of the guide structure of the tail of the boring spindle, thereby ensuring the fast, reliable and stable feeding of the boring spindle, and improving the straightness and positioning accuracy of the boring spindle feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the present utility model.

[0012] Figure 2 for Figure 1 Medium AA view.

[0013] Figure 3 for Figure 1 Middle BB view.

[0014] Among them: 1. Slide; 2. Screw nut support seat; 3. Linear guide; 4. Slider; 5. Guide rail fixing plate; 6. Flange hanger; 7. Flange hanger adjustment pad; 8. Slider adjustment pad; 9. Pressure block; 10. Boring shaft; 11. Ball screw; 12. Fixing plate screw; 13. Set screw; 14. Threaded hole; 15. Rectangular slot; 16 Rectangular through slot; 17. Guide rail screw. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0016] like Figures 1 to 3The boring spindle tail support structure of a boring and milling spindle unit shown in the figure includes a flange hanger 6, a guide rail fixing plate 5, a linear guide 3, a slider 4, and a screw nut support seat 2. Several of the flange hangers 6 are fixed in the countersunk hole on the top of the slide 1. The flange hanger 6 is a truncated cone structure, and its bottom surface is provided with a rectangular groove 15. The guide rail fixing plate 5 is connected to the rectangular groove 15 of the flange hanger 6 through the fixing plate screw 12. The bottom surface of the guide rail fixing plate 5 is provided with a rectangular through groove 16. The linear guide 3 is reversely connected to the rectangular through groove 16 of the guide rail fixing plate 5 through the guide rail screw 17. The screw nut support seat 2 is installed in the inner cavity of the tail of the slide 1, and the ball screw 11 is connected to the tail of the boring spindle 10 through the screw nut support seat 2. A slider 4 is connected to the top surface of the screw nut support seat 2, and the slider 4 cooperates with the linear guide 3. When the ball screw 11 rotates, the screw nut can be driven to drive the screw nut support seat 2 and the boring shaft 10 to realize the axial feed of the boring shaft. At this time, the slider 4 installed on the top of the screw nut support seat 2 slides along the linear guide rail 3 to realize the support and guiding function of the tail of the boring shaft 10.

[0017] In the above technical solution, the number of the flange hangers 6 is 4, and the 4 flange hangers 6 are arranged at equal intervals in the longitudinal direction of the ram 1 .

[0018] In the above technical solution, the cross-section of the guide rail fixing plate 5 is a rectangular structure, and its width is adapted to the width of the rectangular groove 15 on the bottom surface of the flange hanger 6. The width of the rectangular through groove 16 on the bottom surface of the guide rail fixing plate 5 is adapted to the width of the linear guide rail 3. There is a row of threaded holes arranged at equal intervals on one side of the guide rail fixing plate 5, and set screws 13 for straightening the linear guide rail 3 are installed in the threaded holes to adjust the straightness of the linear guide rail 3.

[0019] In the above technical solution, the number of the sliders 4 is at least two, and the sliders 4 are fixed to the top of the screw nut support 2 and are adapted to the linear guide 3. The sliders 4 are precision linear guide components and can reciprocate along the linear guide 3.

[0020] In the above technical solution, a slider adjustment pad 8 is positioned between one side of the slider 4 and the mounting surface of the screw nut support 2. A wedge-shaped pressure block 9 is positioned between the other side of the slider adjustment pad 8 and the top inclined surface of the screw nut support 2. By varying the thickness of the slider adjustment pad 8, the horizontal position of the screw nut support 2 can be adjusted, ensuring coaxiality between the screw nut support 2 and the spindle center. The wedge-shaped pressure block 9 is used to laterally compress the slider 4.

[0021] In the above technical solution, a hanger adjustment pad 7 is provided between the countersunk hole of the ram 1 and the flange hanger 6. By changing the thickness of the adjustment pad 7, the vertical position of the screw nut support base 2 can be adjusted as a whole to ensure the coaxiality of the screw nut support base 2 and the spindle center.

[0022] The screw nut support seat 2 is installed at the tail of the boring shaft 10, and a linear guide slider 4 is installed on the top of the screw nut support seat 2. Figure 3 As shown, the nut of the ball screw 11 is installed in the bottom circular hole of the screw nut support seat 2 by means of screws, ensuring that the central axis of the ball screw 11 is parallel to the central axis of the boring shaft 10.

[0023] During operation, the ball screw 11 rotates, and the screw nut drives the screw nut support seat 2 at the tail of the boring spindle 10 and the slider 4 on its top to feed axially along the linear guide 3. The linear guide 3 is installed on the top of the inner cavity of the slide 1 through the flange hanger and the 6 guide rail fixing plate 5, so that the structural rigidity and guiding accuracy of the linear guide 3 can play their due effect, effectively improving the support rigidity of the tail of the boring spindle and the straightness of the boring spindle feed, ensuring the fast, reliable and smooth axial feed movement of the boring spindle, and improving the positioning accuracy and repeat positioning accuracy of the boring spindle feed.

[0024] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any changes or replacements that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed in the present invention should be covered by the protection scope of the present invention.

Claims

1. A boring spindle tail support structure of a boring and milling spindle unit, characterized by: It includes a flange hanger, a guide rail fixing plate, a linear guide rail, a slider, and a screw nut support seat. Several of the flange hangers are fixed in the countersunk holes on the top of the ram. The flange hanger is a truncated cone structure with a rectangular groove on its bottom surface. The guide rail fixing plate is connected to the rectangular groove of the flange hanger through fixing plate screws. The bottom surface of the guide rail fixing plate is provided with a rectangular through groove. The linear guide is reversely connected to the rectangular through groove of the guide rail fixing plate through guide rail screws. The screw nut support seat is installed in the inner cavity of the tail of the ram, and the ball screw is connected to the tail of the boring shaft through the screw nut support seat. A slider is connected to the top surface of the screw nut support seat, and the slider cooperates with the linear guide rail.

2. The boring spindle tail support structure of the boring and milling spindle unit according to claim 1, characterized in that: The number of the flange hangers is 4, and the 4 flange hangers are arranged at equal intervals in the long direction of the ram.

3. The boring spindle tail support structure of the boring and milling spindle unit according to claim 1, characterized in that: The cross-section of the guide rail fixing plate is a rectangular structure, and its width is adapted to the width of the rectangular groove on the bottom surface of the flange hanger. The width of the rectangular through groove on the bottom surface of the guide rail fixing plate is adapted to the width of the linear guide rail. There is a row of threaded holes arranged at equal intervals on one side of the guide rail fixing plate, and set screws for straightening the linear guide rail are installed in the threaded holes.

4. The boring spindle tail support structure of the boring and milling spindle unit according to claim 1, characterized in that: The number of the sliders is at least 2. The sliders are fixed on the top of the screw nut support seat and are adapted to the linear guide rail. They are precision linear guide components.

5. The boring spindle tail support structure of the boring and milling spindle unit according to claim 1, characterized in that: A slider adjustment pad is provided between one side of the slider and the mounting surface of the screw nut support seat, and a wedge-shaped pressure block is provided between the other side of the slider and the top inclined surface of the screw nut support seat.

6. The boring spindle tail support structure of the boring and milling spindle unit according to claim 1, characterized in that: A hanger adjustment pad is provided between the countersunk hole of the ram and the flange hanger.

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