A tool holding device for boring special-shaped holes

Abstract

The invention discloses a tool clamping device for boring special-shaped holes, comprising a clamping body, a mandrel, a locking screw plug, an end cover, a tool sleeve, a tool, an adjusting screw plug and an adjusting base; the upper end of the clamping body is a Morse outer cone, the lower end is a cylindrical container, and the side of the container is provided with at least one sliding sleeve; the mandrel comprises an upper and lower section, the lower end of a long compression spring abuts against the top of the upper section of the mandrel, a second through hole is provided at the bottom of the container, the end cover is connected to the lower opening of the second through hole, and a guide mechanism A is provided between the lower section of the mandrel and the end cover; the tool sleeve is stepped, and the tool can be detachably plugged into the tool sleeve; the locking screw plug cooperates with the internal thread at the top end of the sliding sleeve, a spherical contact is provided on the upper end of the end surface of the tail end of the tool sleeve, the spherical contact contacts with the contoured surface of the upper section of the mandrel, and a guide mechanism B is provided between the tool sleeve and the sliding sleeve. The invention has a simple structure, is scientific and reasonable, has high processing accuracy, and has low design and manufacturing costs, and is convenient for processing special-shaped holes.

Description

Technical Field

[0001] The invention relates to the technical field of machining equipment, and in particular to a tool clamping device for boring special-shaped holes. Background Art

[0002] Boring refers to the further processing of forged, cast or drilled holes. Boring can enlarge the hole diameter, improve accuracy, reduce surface roughness, and better correct the deviation of the original hole axis.

[0003] In production, we often encounter the processing of various large special-shaped holes, such as large arc holes, large tapered holes, etc. Since ordinary boring machines can only process cylindrical holes and do not have the function of processing these holes, we use forming tools or machining centers for processing. However, since the processing equipment of machining centers is expensive, the corresponding processing costs are relatively high.

[0004] Therefore, it is necessary to invent a tool clamping device for boring special-shaped holes to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a tool clamping device for boring special-shaped holes, which has a simple structure, is scientific and reasonable, and is convenient for processing special-shaped holes, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A tool clamping device for boring special-shaped holes, comprising a clamping body, a mandrel, a locking screw plug, an end cover, a tool sleeve, a tool, an adjusting screw plug and an adjusting base;

[0008] The upper end of the clamping body is a Morse outer cone, and the lower end is a cylindrical container. The side of the container is provided with at least one sliding sleeve, and the sliding sleeve is provided with a first through hole. The lower end of the Morse outer cone is provided with a first blind hole that penetrates the inner cavity of the container, and a long compression spring is provided in the first blind hole.

[0009] The core shaft comprises an upper and lower section, the lower end of the long compression spring abuts against the top end of the upper section of the core shaft, a second through hole is provided at the bottom of the container, the end cover is connected to the lower opening of the second through hole, and a third through hole is provided at the bottom end of the end cover, the upper section of the core shaft is slidably matched with the second through hole and the inner wall of the end cover, the lower section of the core shaft is slidably matched with the third through hole, and a guide mechanism A is provided between the lower section of the core shaft and the end cover, the adjusting screw plug is rotatably connected to the bottom end of the lower section of the core shaft, and the internal thread of the adjusting base is matched with the external thread of the adjusting screw plug;

[0010] The tool sleeve is in a step shape, and the tool is detachably connected to the tool sleeve; the external thread of the locking screw plug cooperates with the internal thread of the top end of the sliding sleeve, and a fourth through hole is provided on the locking screw plug. The outer cylinder at the rear end of the tool sleeve slides with the first through hole, and a short compression spring is provided between the rear end of the tool sleeve and the locking screw plug, and the outer contour of the short compression spring slides with the first through hole, and the outer cylinder at the head end of the tool sleeve slides with the fourth through hole. A spherical contact is provided on the upper end surface of the rear end of the tool sleeve, and the spherical contact contacts with the contoured surface of the upper section of the core shaft, and a guide mechanism B is provided between the tool sleeve and the sliding sleeve.

[0011] A further improvement of the present invention is that the first blind hole is step-shaped, the small hole at the upper end is slidingly matched with the outer contour of the long compression spring, and the large hole at the lower end is slidingly matched with the upper section of the core shaft; the top end of the upper section of the core shaft is fixedly connected with an upper short shaft, and the outer cylinder of the upper short shaft is transitionally matched with the inner hole of the long compression spring.

[0012] A further improvement of the present invention is that the bottom end of the lower section of the core shaft is fixedly connected with a lower short shaft, the outer cylinder of the lower short shaft is interference fit with the inner hole of the thrust ball bearing, the upper end of the adjusting screw plug is provided with a second blind hole, and the second blind hole is interference fit with the outer circle of the lower retaining ring of the thrust ball bearing.

[0013] A further improvement of the present invention is that the guide mechanism A includes a hexagon socket long cylindrical end set screw and a guide groove; the guide groove is arranged on the outer wall of the lower section of the core shaft, and a transverse threaded through hole is provided at the third through hole of the end cover, the hexagon socket long cylindrical end set screw is threadedly matched with the threaded through hole, and the cylinder of the hexagon socket long cylindrical end set screw is slidably matched in the guide groove.

[0014] A further improvement of the present invention is that a square third blind hole is provided at the head end of the tool sleeve, the tool and the inner wall clearance of the third blind hole are matched, vertical threaded through holes are respectively provided on the outer circle upper surfaces at both ends of the tool sleeve, and the hexagon socket clamping bolt locks the tool in the third blind hole, and the hexagon socket clamping bolt is located on the outside of the sliding sleeve.

[0015] A further improvement of the present invention is that the guide mechanism B includes a guide hole and a hexagonal cone end adjusting bolt, the long waisted guide hole is arranged at the upper end of the sliding sleeve, the hexagonal cone end adjusting bolt is threadedly matched with the threaded through hole at the rear end of the tool sleeve, and the hexagonal cone end adjusting bolt is slidingly matched with the guide hole.

[0016] A further improvement of the present invention is that the locking screw plug is in a step shape, and the small cylinder of the locking screw plug is transitionally matched with the inner hole of the short compression spring.

[0017] A further improvement of the present invention is that the contoured surface of the upper section of the mandrel is a convex arc surface, a concave arc surface or a conical surface.

[0018] A further improvement of the present invention is that the number of the sliding sleeves is two and they are symmetrically arranged on the left and right, and the clamping body is T-shaped as a whole.

[0019] A further improvement of the present invention is that an adjusting rod for adjusting the extension length of the tool is provided in the third blind hole, the adjusting rod is cylindrical and slidingly cooperates with the third blind hole, one end of the adjusting rod is in contact with the tail end of the tool, and the other end of the adjusting rod is provided with a chamfer, and the chamfer is in contact with the conical surface of the hexagonal cone end adjusting bolt.

[0020] Beneficial effects of the present invention:

[0021] The tool clamping device for boring special-shaped holes of the present invention has a simple structure, is scientific and reasonable, has high processing accuracy, and has low design and manufacturing costs, and is convenient for processing special-shaped holes.

[0022] The tool clamping device for boring special-shaped holes of the present invention can replace mandrels of different shapes to realize the processing of various special-shaped holes such as concave arcs, convex arcs, cones, etc., thereby expanding the processing range.

[0023] The tool clamping device for boring special-shaped holes of the present invention has a wide range of applications and can be widely adapted to machine tools such as vertical boring machines, vertical milling machines, vertical drilling machines, and radial drilling machines.

[0024] The tool clamping device for boring special-shaped holes of the present invention comprises two sliding sleeves symmetrically arranged on the left and right to ensure double-knife cutting, realize rough and fine processing at one time, and improve production efficiency.

[0025] The tool clamping device for boring special-shaped holes of the present invention has an adjusting rod for adjusting the tool extension length in the third blind hole. The tool extension length can be fine-tuned by pressing down the chamfer of the length adjusting rod with the adjusting bolt at the inner hexagonal cone end, thereby ensuring the dimensional accuracy of the hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 It is an overall cross-sectional view of the present invention when processing a concave arc hole.

[0028] Figure 3 It is an overall cross-sectional view of the present invention when processing a convex arc hole.

[0029] Figure 4 It is a schematic diagram of the clamping body structure of the present invention.

[0030] Figure 5 It is a schematic diagram of the knife sheath structure of the present invention.

[0031] Figure 6 It is a schematic diagram of the locking screw plug structure of the present invention.

[0032] Figure 7It is a schematic diagram of the end cover structure of the present invention.

[0033] In the figure: 1-clamping body, 101-Morse outer cone, 102-accommodating body, 103-sleeve, 1031-guide hole, 2-core shaft, 201-upper section of core shaft, 202-lower section of core shaft, 203-contact surface, 204-upper short shaft, 205-lower short shaft, 206-guide groove, 3-locking screw plug, 4-end cover, 5-tool sleeve, 6-tool, 7-adjusting screw plug, 8-adjusting base, 9-long compression spring, 10-spherical contact, 11-thrust ball bearing, 12-hexagon socket long cylindrical end set screw, 13-hexagon socket clamping bolt, 14-hexagon socket cone end adjusting bolt, 15-adjusting rod, 16-short compression spring. DETAILED DESCRIPTION

[0034] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments.

[0035] Example 1: Figures 1 to 7As shown, a tool clamping device for boring special-shaped holes includes a clamping body 1, a core shaft 2, a locking screw plug 3, an end cover 4, a tool sleeve 5, a tool 6, an adjusting screw plug 7 and an adjusting base 8; the upper end of the clamping body 1 is a Morse outer cone 101, and the lower end is a cylindrical container 102, the side of the container 102 is provided with at least one sliding sleeve 103, the sliding sleeve 103 is provided with a first through hole, the lower end of the Morse outer cone 101 is provided with a first blind hole that penetrates the inner cavity of the container 102, and the first blind hole is provided with a long compression spring 9; the core shaft 2 includes an upper and lower section, the lower end of the long compression spring 9 abuts against the top end of the core shaft upper section 201, the bottom of the container 102 is provided with a second through hole, and the end cover 4 is fixedly connected to the second through hole by a hexagonal bolt. The lower end of the end cover 4 is provided with a third through hole, the upper section 201 of the mandrel is slidably matched with the second through hole and the inner wall of the end cover 4, the lower section 202 of the mandrel is slidably matched with the third through hole, and a guide mechanism A is provided between the lower section 202 of the mandrel and the end cover 4, the adjusting screw plug 7 is rotatably connected to the bottom end of the lower section 202 of the mandrel, and the internal thread of the adjusting base 8 is matched with the external thread of the adjusting screw plug 7; the tool sleeve 5 is stepped, and the tool 6 is detachably connected to the tool sleeve 5; the locking screw plug 3 is threadedly matched with the top end of the sliding sleeve 103, and a fourth through hole is provided on the locking screw plug 3, the outer cylinder of the tail end of the tool sleeve 5 is slidably matched with the first through hole, and a short compression spring 16 is provided between the tail end of the tool sleeve 5 and the locking screw plug 3, and the outer contour of the short compression spring 16 is slidably matched with the first through hole The outer cylinder at the front end of the knife sleeve 5 is slidably matched with the fourth through hole, and a spherical contact 10 is provided on the upper end surface of the tail end of the knife sleeve 5, and the spherical contact 10 is in contact with the contoured surface 203 of the upper section 201 of the core shaft, and a guide mechanism B is provided between the knife sleeve 5 and the sliding sleeve 103; the first blind hole is stepped, the small hole at the upper end is slidably matched with the long compression spring 9, and the large hole at the lower end is slidably matched with the upper section 201 of the core shaft; the top of the upper section 201 of the core shaft is fixedly connected with an upper short shaft 204, and the outer cylinder of the upper short shaft 204 is transitionally matched with the inner hole of the long compression spring 9; the bottom end of the lower section 202 of the core shaft is fixedly connected with a lower short shaft 205, and the outer cylinder of the lower short shaft 205 is interference fit with the inner hole of the thrust ball bearing 11, and a second blind hole is provided on the upper end of the adjusting screw plug 7, and the first The second blind hole is interference fit with the outer circle of the lower retaining ring of the thrust ball bearing 11; the guide mechanism A includes a hexagon socket long cylindrical end set screw 12 and a guide groove 206; the guide groove 206 is arranged on the outer wall of the lower section 202 of the core shaft, and a transverse threaded through hole is provided at the third through hole of the end cover 4, and the hexagon socket long cylindrical end set screw 12 is threadedly matched with the threaded through hole, and the cylinder of the hexagon socket long cylindrical end set screw 12 is slidably matched in the guide groove 206; the head end of the tool sleeve 5 is provided with a square third blind hole, and the tool 6 is clearance matched with the inner wall of the third blind hole, and the upper surfaces of the outer circles at both ends of the tool sleeve 5 are respectively provided with vertical threaded through holes, and the hexagon socket clamping bolt 13 locks the tool 6 in the third blind hole, and the hexagon socket clamping bolt 13 is located on the outside of the sliding sleeve 103;The guide mechanism B includes a guide hole 1031 and a hexagon cone-end adjusting bolt 14. The long waist-shaped guide hole 1031 is arranged at the upper end of the sliding sleeve 103. The hexagon cone-end adjusting bolt 14 is threadedly matched with the threaded through hole at the rear end of the knife sleeve 5, and the hexagon cone-end adjusting bolt 14 is slidably matched with the guide hole 1031; the locking screw plug 3 is stepped, and the small cylinder of the locking screw plug 3 is transitionally matched with the inner hole of the short compression spring 16; the contoured surface 203 of the upper section 201 of the mandrel is a convex arc surface, a concave arc surface or a conical surface; the sliding sleeve 103 is two symmetrically arranged on the left and right, and the clamping body 1 is T-shaped as a whole. ;

[0036] Embodiment 2: This embodiment is a further improvement of Embodiment 1. The main improvement is that when Embodiment 1 is used, it is impossible to fine-tune the extension length of the tool 6; in this embodiment, the above defects can be avoided. Specifically:

[0037] An adjusting rod 15 for adjusting the extension length of the tool 6 is provided in the third blind hole. The adjusting rod 15 is cylindrical and slidably cooperates with the third blind hole. One end of the adjusting rod 15 contacts the rear end of the tool 6, and the other end of the adjusting rod 15 is provided with a chamfer, and the chamfer contacts the conical surface of the hexagonal cone-end adjusting bolt 14. When the present embodiment is in use, an adjusting rod 15 for adjusting the extension length of the tool 6 is provided in the third blind hole. By using the hexagonal cone-end adjusting bolt 14 to press down the chamfer of the length adjusting rod 15, the extension length of the tool 6 can be fine-tuned, thereby ensuring the dimensional accuracy of the hole.

[0038] Apart from this, this embodiment is exactly the same as Embodiment 1 and will not be described in detail here.

[0039] The specific working principle of the present invention is as follows:

[0040] Before processing, select the corresponding mandrel 2 according to the shape of the hole, and follow Figure 1 After assembling the device, select the appropriate tool 6 and length adjustment rod 15 according to the size of the hole. The height difference between the tips of the two tools 6 is 1 to 3 mm, and the difference in the extended length is about 1 mm. Ensure that the size of the hole processed by the extended length of the long tool 6 is the final size of the hole. In this way, the rough and fine processing of the inner hole can be completed in one time. If the accuracy requirement of the hole is high, you can first slightly loosen the clamping bolt of the tool 6, tighten the hexagonal cone end adjusting bolt 14, and rely on the contact between its lower end cone surface and the chamfer of the adjusting rod 15. Under the action of the cone pressing down the chamfer of the adjusting rod 15, the extended length of the tool 6 can be fine-tuned, thereby ensuring the dimensional accuracy of the hole.

[0041] During processing, firstly, the hole center and the spindle axis are aligned, then the machine tool spindle and the adjustment base 8 are adjusted so that the height of the tool tip 6 is slightly higher than the upper plane of the hole, and at the same time, the bottom surface of the adjustment base 8 is ensured to be in contact with the table surface of the machine tool workbench. Finally, the spindle is allowed to move downward automatically. Under the guidance of the long compression spring 9 and the hexagonal long cylindrical end set screw 12, the core shaft 2 remains stationary up and down while the clamping body 1 drives the tool 6 to rotate from top to bottom. Under the guidance of the short compression spring 16 and the hexagonal cone end adjusting bolt 14, the spherical contact 10 on the rear end face of the tool sleeve 5 is always in contact with the contour surface 203 of the core shaft 2, so that the tool tip can run according to the contour of the contour surface 203, and finally the processing of the forming surface is completed.

[0042] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A tool holding device for boring special-shaped holes, characterized in that: It comprises a clamping body (1), a core shaft (2), a locking screw plug (3), an end cover (4), a tool sleeve (5), a tool (6), an adjusting screw plug (7) and an adjusting base (8); The upper end of the clamping body (1) is a Morse outer cone (101), and the lower end is a cylindrical containing body (102); at least one sliding sleeve (103) is provided on the side of the containing body (102); a first through hole is provided in the sliding sleeve (103); a first blind hole is provided at the lower end of the Morse outer cone (101) and is communicated with the inner cavity of the containing body (102); a long compression spring (9) is provided in the first blind hole; The core shaft (2) comprises an upper and lower section, the lower end of the long compression spring (9) abuts against the top end of the core shaft upper section (201), a second through hole is provided at the bottom of the housing (102), the end cover (4) is connected to the lower opening of the second through hole, and a third through hole is provided at the bottom end of the end cover (4), the core shaft upper section (201) is slidably matched with the second through hole and the inner wall of the end cover (4), the core shaft lower section (202) is slidably matched with the third through hole, and a guide mechanism A is provided between the core shaft lower section (202) and the end cover (4), the adjusting screw plug (7) is rotatably connected to the bottom end of the core shaft lower section (202), and the internal thread of the adjusting base (8) is matched with the external thread of the adjusting screw plug (7); The knife sleeve (5) is in a step shape, and the knife (6) is detachably connected to the knife sleeve (5); the external thread of the locking screw plug (3) cooperates with the internal thread of the top end of the sliding sleeve (103); a fourth through hole is provided on the locking screw plug (3); the outer cylinder at the rear end of the knife sleeve (5) is slidably engaged with the first through hole; a short compression spring (16) is provided between the rear end of the knife sleeve (5) and the locking screw plug (3); the outer contour of the short compression spring (16) is slidably engaged with the first through hole; the outer cylinder at the front end of the knife sleeve (5) is slidably engaged with the fourth through hole; a spherical contact (10) is provided on the upper end surface of the rear end of the knife sleeve (5); the spherical contact (10) contacts the contoured surface (203) of the upper section (201) of the core shaft; and a guide mechanism B is provided between the knife sleeve (5) and the sliding sleeve (103); The first blind hole is in a step shape, the small hole at the upper end is in sliding cooperation with the outer contour of the long compression spring (9), and the large hole at the lower end is in sliding cooperation with the upper section (201) of the mandrel; the top end of the upper section (201) of the mandrel is fixedly connected with an upper short shaft (204), and the outer cylinder of the upper short shaft (204) is in transition cooperation with the inner hole of the long compression spring (9); The bottom end of the lower section (202) of the mandrel is fixedly connected to a lower short shaft (205), the outer cylinder of the lower short shaft (205) is interference fit with the inner hole of the thrust ball bearing (11), the upper end of the adjusting screw plug (7) is provided with a second blind hole, and the second blind hole is interference fit with the outer circle of the lower retaining ring of the thrust ball bearing (11); The guide mechanism A comprises a hexagon socket long cylindrical end set screw (12) and a guide groove (206); the guide groove (206) is arranged on the outer wall of the lower section (202) of the core shaft, and a transverse threaded through hole is arranged at the third through hole of the end cover (4), the hexagon socket long cylindrical end set screw (12) is threadedly matched with the threaded through hole, and the cylinder of the hexagon socket long cylindrical end set screw (12) is slidably matched with the guide groove (206); A square third blind hole is provided at the head end of the tool sleeve (5), the tool (6) is clearance-matched with the inner wall of the third blind hole, vertical threaded through holes are respectively provided on the outer circumferential upper surfaces of both ends of the tool sleeve (5), the hexagon socket clamping bolt (13) locks the tool (6) in the third blind hole, and the hexagon socket clamping bolt (13) is located outside the sliding sleeve (103).

2. A tool holding device for boring special-shaped holes according to claim 1, characterized in that: The guide mechanism B comprises a guide hole (1031) and a hexagonal cone-end adjusting bolt (14); the long waist-shaped guide hole (1031) is arranged at the upper end of the sliding sleeve (103); the hexagonal cone-end adjusting bolt (14) is threadedly matched with the threaded through hole at the rear end of the tool sleeve (5); and the hexagonal cone-end adjusting bolt (14) is slidably matched with the guide hole (1031).

3. A tool holding device for boring special-shaped holes according to claim 2, characterized in that: The locking screw plug (3) is in a step shape, and the small cylinder of the locking screw plug (3) is transitionally matched with the inner hole of the short compression spring (16).

4. A tool holding device for boring special-shaped holes according to claim 1, characterized in that: The contoured surface (203) of the mandrel upper section (201) is a convex arc surface, a concave arc surface or a conical surface.

5. A tool holding device for boring special-shaped holes according to claim 1, characterized in that: The sliding sleeves (103) are two in a left-right symmetrical arrangement, and the clamping body (1) is in a T-shape as a whole.

6. A tool holding device for boring special-shaped holes according to claim 1, characterized in that: An adjusting rod (15) for adjusting the extension length of the tool (6) is provided in the third blind hole. The adjusting rod (15) is cylindrical and slidably engages with the third blind hole. One end of the adjusting rod (15) contacts the rear end of the tool (6). The other end of the adjusting rod (15) is provided with a chamfer, and the chamfer contacts the conical surface of the hexagonal cone-end adjusting bolt (14).

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