Deep hole machining clamp for machine tool box type parts

Abstract

The invention discloses a deep hole machining clamp for machine tool box type parts, and belongs to the field of box type part machining. The boring tool comprises a boring tool rod, the front end of the boring tool rod is connected with a transmission tool handle, the front portion and the rear portion of the boring tool rod are provided with a front supporting sleeve and a rear supporting sleeve respectively in a matched mode, a tool square hole is formed in the middle of the boring tool rod, a tool apron is arranged in the tool square hole, and an adjustable boring tool bit is arranged on the tool apron. A hanging wall is arranged on the outer circle of the rear supporting sleeve in a matched mode, a side positioning plate is arranged on one side of the upper portion of the hanging wall, and a side baffle is arranged on the other side of the upper portion of the hanging wall. Machine tool and cutter errors can be eliminated through the clamp precision, and the part machining precision is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of machining of box - type parts, and particularly relates to a deep - hole machining fixture for box - type parts of machine tools. Background Art

[0002] The traditional deep - hole machining method for box - type parts is that the machine tool has an extendable spindle and the tool is an extended damping tool holder for machining. However, due to factors such as the spindle clearance of the machine tool, the rigidity of the extended spindle, and the weight of the extended damping tool holder, the problem of "bowing down" of the spindle overhang causes unqualified coaxiality of the holes in the box body, and the problem of tool vibration causes unqualified roughness of the machined holes. Summary of the Invention

[0003] The present invention aims at the above problems, makes up for the deficiencies of the prior art, and provides a deep - hole machining fixture for box - type parts of machine tools; the present invention can eliminate the errors of the machine tool and the tool through the fixture accuracy, and ensure the machining accuracy of parts.

[0004] To achieve the above object, the present invention adopts the following technical solutions.

[0005] The present invention provides a deep - hole machining fixture for box - type parts of machine tools, including a boring bar. It is characterized in that a transmission tool holder is connected to the front end of the boring bar, a front support sleeve and a rear support sleeve are respectively arranged in a small - clearance fit with the front part and the rear part of the boring bar, a tool - square hole is arranged in the middle of the boring bar, a tool holder is arranged in the tool - square hole, an adjustable boring head is arranged on the tool holder, a hanging wall is arranged in an outer - circle fit with the rear support sleeve, a side positioning plate is arranged on one side of the upper part of the hanging wall, and a side baffle is arranged on the other side of the upper part of the hanging wall.

[0006] Further, both the front support sleeve and the rear support sleeve are arranged in a small - clearance fit with the boring bar.

[0007] Further, the rear support sleeve and the hanging wall are arranged in a small - clearance fit.

[0008] Further, the transmission tool holder and the boring bar are flexibly connected.

[0009] Further, the outer circle of the front support sleeve is arranged in a small - clearance fit with the front - end hole of the part box body.

[0010] Further, screw holes are arranged on the side baffle, and the side baffle is connected to the part box body through set screws cooperating with the screw holes to fix the hanging wall and the part box body, and the set screws are adjusted to make the side positioning plate closely fit against the side of the part box body without clearance.

[0011] Furthermore, screws are arranged on the upper part of the hanging wall, and the hanging wall is tightly pressed and fixed to the upper side of the part box body through set screws.

[0012] Advantages of the present invention

[0013] The present invention can form a double support through the reference conversion of the part itself, and convert the front and side references of the box body into hole references through a fixture, which can eliminate the errors caused by adverse factors, ensure the coaxiality of the deep holes of the box body parts through the fixture accuracy, eliminate the problems of the "bowing down" of the machine tool spindle overhang and tool vibration, and ensure the machining accuracy of the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 is a schematic diagram of the external structure after the combination of the present invention and the part box body.

[0017] Figure 3 is a schematic diagram of the sectional structure after the combination of the present invention and the part box body.

[0018] Reference signs in the drawings: 1 is a boring bar, 2 is a driving tool holder, 3 is a front support sleeve, 4 is a rear support sleeve, 5 is a tool square hole, 6 is a tool holder, 7 is an adjustable boring head, 8 is a hanging wall, 9 is a side positioning plate, 10 is a side baffle, and 11 is a part box body. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] As shown in the accompanying drawings, the present embodiment provides a fixture for deep hole machining of machine tool box body parts, including a boring bar. The front end of the boring bar 1 is flexibly connected to a driving tool holder 2, and the front end of the driving tool holder 2 is connected to the machine tool spindle to drive the boring bar 1 to rotate.

[0020] The front part and the rear part of the boring bar 1 are respectively provided with a front support sleeve 3 and a rear support sleeve 4 in a matching manner. Both the front support sleeve 3 and the rear support sleeve 4 are arranged in a small clearance fit with the boring bar 1. The outer circle of the front support sleeve 3 is in a small clearance fit with the front end hole of the part box body 11.

[0021] The outer circle of the rear support sleeve 4 is provided with a hanging wall 8 in a small clearance fit. One side of the upper part of the hanging wall 8 is provided with a side positioning plate 9, and the other side of the upper part of the hanging wall 8 is provided with a side baffle 10. The side baffle 10 is provided with a screw hole, and the side baffle 10 is connected to the part box body 11 through a set screw cooperating with the screw hole, thereby fixing the hanging wall 8 and the part box body 11. The side reference surface of the hanging wall 8 is combined with the side reference surface of the part box body 11 through the side positioning plate 9, and the set screw is adjusted to make the side positioning plate 9 fit tightly with the side of the part box body 11 without clearance.

[0022] There are screws provided on the upper part of the hanging wall 8. The hanging wall 8 is fixed to the upper side of the part box body 11 through set screws, and the reference plane on the hanging wall 8 is combined with the reference plane on the part box body 11.

[0023] A tool square hole 5 is provided in the middle of the boring bar 1. A tool holder 6 is arranged in the tool square hole 5 and is laterally tightened with screws. An adjustable boring head 7 is arranged on the tool holder 6 and is laterally tightened with screws. The adjustable boring head 7 is adjusted to the machining dimension. The adjustable boring head 7 is driven to rotate by the rotation of the boring bar 1 to machine the rear end hole of the part box body 11.

[0024] By converting the front and side references of the part box body 11 into hole references, and using the front support sleeve 3 and the rear support sleeve 4 as double support points, the problem of "lowering the head" of the overhang of the machine tool spindle and the tool during machining is solved.

[0025] During the installation before machining, the front support sleeve 3 is installed into the front end hole of the part box body 11 to cooperate with it. After combining the hanging wall 8, the rear support sleeve 4, the side positioning plate 9, and the side baffle 10, they are placed into the square window hole of the part box body 11 along the side, and are laterally connected with set screws, so that the side positioning plate 9 is closely attached to the side of the part box body 11 without gaps. Then, the hanging wall 8 is pressed and fixed on the part box body 11 with set screws from above. After the boring bar 1 is hung level, it passes through the front support sleeve 3 and the rear support sleeve 4. The transmission tool handle 2 is flexibly connected to the boring bar 1 and the transmission tool handle 2 is installed on the machine tool spindle. The tool holder 6 is installed in the tool square hole 5 of the boring bar 1 and is laterally tightened with screws, and the adjustable boring head 7 is installed on the tool holder 6 and is laterally tightened with screws. The adjustable boring head 7 is adjusted to the machining dimension.

[0026] The deep hole is machined by driving the rotation of the boring bar 1 through the rotation of the machine tool spindle. During semi-finishing, the position of the tool holder 6 can be adjusted according to the machining allowance of the boring hole, and the adjustable boring head 7 can be adjusted during finishing. Since each fixture part is detachable and separable, therefore, by replacing the fixture parts of different size specifications and combining them, it can be adapted to the machining of box-shaped parts with similar shapes and different sizes.

[0027] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited by the technical solutions described in the embodiments of the present invention. Those of ordinary skill in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effect; as long as it meets the usage requirements, it is within the protection scope of the present invention.

Claims

1. A deep hole machining fixture for machine tool box parts, including a boring bar (1), characterized in that, The front end of the boring bar (1) is connected to a drive tool holder (2). The front and rear parts of the boring bar (1) are respectively provided with a front support sleeve (3) and a rear support sleeve (4) in a mating manner. A tool square hole (5) is provided in the middle of the boring bar (1). A tool holder (6) is arranged in the tool square hole (5). An adjustable boring head (7) is arranged on the tool holder (6). The outer circumference of the rear support sleeve (4) is provided with a wall crane (8) in a mating manner. A side positioning plate (9) is arranged on one side of the upper part of the wall crane (8), and a side baffle (10) is arranged on the other side of the upper part of the wall crane (8).

2. A deep-hole machining fixture for machine tool box parts according to claim 1, characterized in that, Both the front support sleeve (3) and the rear support sleeve (4) are arranged in a small clearance fit with the boring bar (1).

3. A deep-hole machining fixture for machine tool box parts according to claim 1, characterized in that, The rear support sleeve (4) is arranged in a small clearance fit with the wall crane (8).

4. A deep hole machining fixture for machine tool box parts according to claim 1, characterized in that, The drive tool holder (2) is flexibly connected to the boring bar (1).

5. A deep-hole machining fixture for machine tool box parts according to claim 1, characterized in that, The outer circumference of the front support sleeve (3) is arranged in a small clearance fit with the front end hole of the part box body (11).

6. A deep-hole machining fixture for machine tool box parts according to claim 1, characterized in that, The side baffle (10) is provided with a screw hole, and the side baffle (10) is connected to the part box body (11) by a set screw cooperating with the screw hole to fix the wall crane (8) to the part box body (11). The set screw is adjusted so that the side positioning plate (9) is in close contact with the side of the part box body (11) without clearance.

7. A deep-hole machining fixture for machine tool box parts according to claim 6, characterized in that, The upper part of the wall crane (8) is provided with a screw, and the wall crane (8) is pressed and fixed to the upper side of the part box body (11) by a set screw.

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