阅读说明：本技术 大直径内孔立车抛光工装及提高粗糙度的一体化加工方法 (Large-diameter inner hole vertical lathe polishing tool and integrated machining method for improving roughness ) 是由 李伟 于 2020-05-30 设计创作，主要内容包括：本发明涉及一种大直径内孔立车抛光工装及提高粗糙度的一体化加工方法,工装包括主体块、连接板、珩磨砂条和弹性元件,其中：主体块用于连接在立式车床刀架上,具有用于指向固定在立式车床旋转工作台上的工件内孔侧壁的工作端,主体块的工作端设有安装槽；连接板嵌设于安装槽内,并具有凸出于安装槽开口的延伸部,该连接板可相对于安装槽在工作端指向方向所在的直线上滑动；珩磨砂条设置于连接板的延伸部的末端；弹性元件设置于安装槽内,并作用在连接板上,对连接板施以指向安装槽外方向的弹力。与现有技术相比,本发明简单高效、成本低廉,能够适应粗糙度要求高的大直径内孔加工,可以在立车上一次装夹工件,完成加工,保证形位公差。(The invention relates to a large-diameter inner hole vertical lathe polishing tool and an integrated processing method for improving roughness, wherein the tool comprises a main body block, a connecting plate, a honing emery stick and an elastic element, wherein: the main body block is used for being connected to a tool rest of a vertical lathe and is provided with a working end used for pointing to the side wall of an inner hole of a workpiece fixed on a rotary worktable of the vertical lathe, and the working end of the main body block is provided with an installation groove; the connecting plate is embedded in the mounting groove and is provided with an extending part protruding out of the opening of the mounting groove, and the connecting plate can slide on a straight line of the working end pointing direction relative to the mounting groove; the honing emery stick is arranged at the tail end of the extension part of the connecting plate; the elastic element is arranged in the mounting groove and acts on the connecting plate to apply elastic force pointing to the outer direction of the mounting groove to the connecting plate. Compared with the prior art, the method is simple, efficient and low in cost, can adapt to the machining of the large-diameter inner hole with high requirement on roughness, can clamp a workpiece on a vertical lathe once to complete machining, and ensures form and position tolerance.)

1. The utility model provides a major diameter hole merry go round machine polishing frock for the polishing of work piece (6) major diameter hole, its characterized in that includes:

the main body block (1) is connected to a tool rest (5) of the vertical lathe and is provided with a working end (101) pointing to the inner hole side wall (61) of a workpiece (1) fixed on a rotary worktable of the vertical lathe, the working end (101) of the main body block (1) is provided with an installation groove (102),

a connecting plate (2) embedded in the mounting groove (102) and provided with an extending part (22) protruding out of the opening of the mounting groove (102), wherein the connecting plate (2) can slide on a straight line of the pointing direction of the working end (101) relative to the mounting groove (102),

the honing emery stick (3) is arranged at the tail end of the extension part (22) of the connecting plate (2),

and the elastic element (4) is arranged in the mounting groove (102), acts on the connecting plate (2), and exerts elastic force pointing to the outer direction of the mounting groove (102) on the connecting plate (2).

2. The large-diameter inner hole vertical lathe polishing tool according to claim 1, wherein the main body block (1) consists of a block body (11) and a cover plate (12) covering two opposite side surfaces of the block body (11), the working end (101) is located at one end of the block body (11), and the other end, opposite to the working end (101), of the block body (11) is connected to a vertical lathe tool rest (5).

3. The large-diameter inner hole vertical lathe polishing tool according to claim 2, characterized in that the mounting groove (102) penetrates through the block body (11) along the direction of the two cover plates (12), and the cover plates (12) cover the two ends of the mounting groove (102); the opening of the mounting groove (102) is positioned on the working end (101).

4. The large-diameter inner hole vertical lathe polishing tool according to any one of claims 2 to 3, wherein the mounting groove (102) is a C-shaped groove.

5. The large-diameter inner hole vertical lathe polishing tool according to claim 4, characterized in that the connecting plate (2) is composed of a plate body (21) and an extension part (22), the plate body (21) is positioned in the mounting groove (102), and the extension part (22) extends out of an opening of the mounting groove (102); the two sides of the plate body (21) are limited by the cover plate (12).

6. The large-diameter inner hole vertical lathe polishing tool according to claim 5, characterized in that when the connecting plate (2) slides relative to the mounting groove (102) to the outermost end on a straight line in which the pointing direction of the working end (101) is located, a moving space is formed between the groove bottom of the mounting groove (102) and the plate body (21), and the elastic element (4) is arranged in the moving space.

7. The large-diameter inner hole vertical lathe polishing tool according to claim 1, wherein one surface, facing the inner hole side wall (61) of the workpiece (6), of the honing emery stick (3) is in an arc shape matched with the shape of the inner hole side wall (61).

8. An integrated machining method for improving roughness of a large-diameter inner hole is characterized in that the tool according to any one of claims 1 to 6 is adopted, and the integrated machining method comprises the following steps:

s1: continuously keeping the clamping state of the previous process on a rotating workbench of the vertical lathe by the workpiece, and installing the tool on a tool rest of the vertical lathe;

s2: rotating the workpiece, moving the vertical lathe tool rest along the radial direction of the workpiece, and driving the tool to move towards the side wall of the inner hole of the workpiece, so that the honing emery stick is tightly attached to the side wall of the inner hole of the workpiece under the action of the elastic element;

s3: the lathe tool rest moves in the axial direction of the workpiece, and the inner hole side wall is machined through the honing sand bars, so that the roughness of the inner hole is improved.

9. The integrated processing method for improving the roughness of the large-diameter inner hole according to claim 8, wherein the speed of the vertical lathe tool rest moving along the axial direction of the workpiece is 3-5 mm/min; the linear speed of the workpiece rotation is 40-60m/min, and the machining allowance is 0.03 mm.

10. The integrated machining method for improving the roughness of the large-diameter inner hole according to claim 8, characterized in that 20# engine oil is used for lubrication in the machining process.

Technical Field

The invention relates to the technical field of large-diameter inner hole machining, in particular to a large-diameter inner hole vertical lathe polishing tool and an integrated machining method for improving roughness.

Background

At present, for the cylinder inner bore with the size larger than phi 1000mm and the roughness drawing requirement smaller than 1.6, a manufacturer does not have a machine tool to process, and although a foreign company has a special machine tool, the processing cost is very high, the processing period cannot be guaranteed, and the production progress is influenced. Therefore, manufacturers need a viable and inexpensive solution.

Disclosure of Invention

The invention aims to provide a vertical lathe polishing tool for a large-diameter inner hole and an integrated processing method for improving roughness. The method is simple, efficient and low in cost, and can be suitable for machining large-diameter inner holes with high roughness requirements.

The purpose of the invention can be realized by the following technical scheme:

the invention provides a large-diameter inner hole vertical lathe polishing tool in a first aspect, which is used for polishing a large-diameter inner hole of a workpiece and comprises the following components:

a main body block which is used for being connected on a tool rest of the vertical lathe and is provided with a working end used for pointing to the side wall of an inner hole of a workpiece fixed on a rotary worktable of the vertical lathe, the working end of the main body block is provided with an installation groove,

a connecting plate embedded in the mounting groove and having an extending portion protruding from the opening of the mounting groove, the connecting plate being slidable relative to the mounting groove on a straight line in which the working end is directed,

the honing emery stick is arranged at the tail end of the extension part of the connecting plate,

and the elastic element is arranged in the mounting groove and acts on the connecting plate to apply elastic force pointing to the outer direction of the mounting groove to the connecting plate.

Preferably, the main body block consists of a block body and cover plates covering two opposite side surfaces of the block body, the working end is positioned at one end of the block body, and the other end, opposite to the working end, of the block body is connected to a tool rest of the vertical lathe.

Preferably, the cover plate is fixed to the block body by a plurality of bolts.

Preferably, the mounting groove penetrates through the block body along the direction of the two cover plates, and the cover plates cover two ends of the mounting groove; the opening of the mounting groove is positioned on the working end.

Preferably, the mounting groove is a C-shaped groove.

Preferably, the connecting plate consists of a plate body and an extension part, the plate body is positioned in the mounting groove, and the extension part extends out of an opening of the mounting groove; the two sides of the plate body are limited by the cover plates.

Preferably, when the connecting plate slides to the outermost end on the straight line where the working end points to the direction with respect to the mounting groove, a moving space is provided between the groove bottom of the mounting groove and the plate body, and the elastic element is disposed in the moving space.

Preferably, the elastic element is at least one spring. More preferably a plurality of springs.

Preferably, one surface of the honing emery stick facing to the side wall of the inner hole of the workpiece is in an arc shape matched with the shape of the side wall of the inner hole.

Preferably, the honing emery stick is glued on the connecting plate through epoxy resin.

The invention provides an integrated processing method for improving the roughness of a large-diameter inner hole, which adopts the tool and comprises the following steps:

s1: continuously keeping the clamping state of the previous process on a rotating workbench of the vertical lathe by the workpiece, and installing the tool on a tool rest of the vertical lathe;

s2: rotating the workpiece, moving the vertical lathe tool rest along the radial direction of the workpiece, and driving the tool to move towards the side wall of the inner hole of the workpiece, so that the honing emery stick is tightly attached to the side wall of the inner hole of the workpiece under the action of the elastic element;

s3: the lathe tool rest moves in the axial direction of the workpiece, and the inner hole side wall is machined through the honing sand bars, so that the roughness of the inner hole is improved.

Preferably, the speed of the vertical lathe tool rest moving along the axial direction of the workpiece is 3-5 mm/min; the linear speed of the workpiece rotation is 40-60m/min, and the machining allowance is 0.03 mm.

Preferably, 20# engine oil is used for lubrication during the process.

In the present invention, the former step generally refers to finish-turning an inner hole on a workpiece.

Compared with the prior art, the invention has the following beneficial effects:

1. low cost and convenience. The existing processing equipment of a large-diameter inner hole workpiece manufacturer, namely a vertical lathe, is effectively utilized, the problem of cost increase caused by additionally purchasing a machine tool is solved, the structure of the tool is simple and ingenious, and the manufacturing manufacturer can carry out processing production by oneself. In addition, the installation, the use and the disassembly of the tool are very convenient.

2. For the large-diameter inner hole, the invention can finish machining by one-time clamping on a vertical lathe to ensure form and position tolerance.

3. The final internal bore surface quality roughness may be less than 1.6. The roughness requirement is met by exploring and optimizing the processing technology.

Drawings

Fig. 1 is a schematic view (top view, and a hatched portion is a schematic cross-sectional view) of a large-diameter inner hole vertical lathe polishing tool according to the present invention.

In the figure, 1 is a main body block, 11 is a block body, 12 is a cover plate, 101 is a working end, 102 is a mounting groove, 103 is a bolt, and 2 is a connecting plate. 21 is the board body, 22 is the extension, 3 is the honing emery stick, 4 is the elastic component, 5 is vertical lathe saddle, 6 is the work piece, 61 is the hole lateral wall.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments.