Cutter support for boring inner hole of long tubular workpiece

Abstract

The utility model discloses a cutter support for boring an inner hole in a long tubular workpiece, a reinforcing rod structure is arranged on one side, in contact with the inner wall of the tubular workpiece, of the cutter support, one end of the reinforcing rod structure is connected to the side wall of one end, close to a cutter, of the cutter support, and the other end of the reinforcing rod structure is detachably connected to a cutter holder. And an included angle is formed between the reinforcing rod and the cutter bracket. The cutter support and the reinforcing rod are each of a telescopic rod structure and sequentially comprise a fixed support, a telescopic support, a fixed rod body, a telescopic rod body and a fastening bolt for adjusting the fixed support and the telescopic support in a telescopic mode. The reinforcing rod structure is arranged on the cutter support and can overcome deformation under the condition that the overall dimension of the cutter support is not changed and the length is increased, so that when the length of a tubular workpiece is increased, the overall dimension of the cutter support does not need to be increased, and the body weight of the cutter support is further reduced; therefore, an operator can quickly assemble and disassemble the tool support on the tool apron, and the operation safety and the machining efficiency are improved.

Description

Technical Field

[0001] The present application relates to the technical field of boring inner holes of long tubular workpieces, and in particular to a tool holder for boring inner holes of long tubular workpieces. Background Art

[0002] At present, when machining a relatively long shaft workpiece on a machine tool, one end of the workpiece is clamped on the machine tool spindle to drive the workpiece to rotate, while the center of the end face of the other end is supported by the rear tailstock of the machine tool (see the manual). Figure 1 As shown in the figure, the stability of the long shaft workpiece is ensured during the machining. When boring the inner hole of the long shaft tubular workpiece, the workpiece is a cylindrical structure and the tool needs to be inserted into the inner cavity of the workpiece for machining. Therefore, the rear tailstock cannot achieve tail end support. At the same time, the machine tool tool holder cannot be inserted into the workpiece. Therefore, when boring the hole, a tool holder is usually used, such as Figure 2 As shown, it is a long rod-shaped structure, whose length is greater than the axial length of the tubular workpiece, and one end of the tool support is fixed on the tool seat of the machine tool, and the other end is equipped with a tool.

[0003] When boring the inner hole of a long tubular workpiece, the rear end of the tool holder is fixed to the tool holder by bolts on the tool holder, and a boring tool is installed on the other end of the tool holder. The tool holder is moved axially to drive the tool holder and the boring tool into the inner cavity of the tubular workpiece, and the processing depth of the tool and the inner wall of the workpiece is adjusted. At the same time, the workpiece is driven to rotate by the machine tool spindle, thereby realizing the inner boring of the long tubular workpiece.

[0004] In order to achieve a complete boring operation on the inner hole of the workpiece, the length of the tool holder is greater than the axial length of the workpiece, and the tail end of the tool holder is clamped on the tool holder, so that most of the tool holder can extend into the inner cavity of the workpiece, while avoiding contact and interference between the tool holder and the workpiece. The longer the axial length of the workpiece, the longer the length of the tool holder is required, which makes the part of the tool holder suspended outside the tool holder longer (such as Figure 2 As shown in the figure, the increase in the tool suspension length requires its external dimensions (such as width and thickness) to be increased synchronously to overcome the force of the workpiece reaction transmitted to the tool holder through the tool during boring processing, so as to avoid bending and deformation of the tool holder, and make the tool holder have a higher body strength. The increase in the length and external dimensions of the tool holder further increases the weight of the tool holder body, which makes it more difficult for operators to load and unload on the tool holder, thereby affecting the processing efficiency of tubular boring operations. Summary of the invention

[0005] In response to the above-mentioned problems, the present application aims to provide a tool holder for boring inner holes in long tubular workpieces, which can reduce the weight of the tool holder while ensuring the strength of the tool holder, so as to facilitate the operator to quickly load and unload the tool holder on the tool holder, thereby improving operational safety and processing efficiency.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted in the present application is as follows: a tool holder for boring the inner hole of a long tubular workpiece, the tool holder is a long rod-shaped structure, whose length is greater than the axial length of the tubular workpiece, and one end of the tool holder is fixed on the tool seat of the machine tool, and the other end is equipped with a tool, characterized in that a reinforcing rod structure is provided on the side of the tool holder that is in contact with the inner wall of the tubular workpiece.

[0007] Preferably, the reinforcing rod structure is a reinforcing rod having one end connected to a side wall of the tool holder close to one end of the tool and the other end detachably connected to the tool holder, and the reinforcing rod forms an angle with the tool holder.

[0008] Preferably, the tool bracket and the reinforcing rod are both telescopic rod structures, which include a fixed bracket and a telescopic bracket, a fixed rod body and a telescopic rod body in sequence, and the outer walls of the fixed bracket and the fixed rod are penetrated with fastening bolts that can be tightened on the telescopic bracket and the telescopic rod body respectively.

[0009] Preferably, an oblique groove which forms an angle with the axis is formed on the outer wall of the telescopic bracket and the telescopic rod, and the fastening bolts are tightened in the oblique groove.

[0010] The beneficial effect of the present application is that a reinforcing rod structure is provided on the tool holder, and the reinforcing rod structure can overcome the deformation (caused by external processing force) when the outer dimensions of the tool holder remain unchanged but the length increases, so that when the length of the tubular workpiece increases, the outer dimensions (width and thickness) of the tool holder do not need to be increased, and the body weight of the tool holder is reduced, so that the operator can quickly load and unload the tool holder on the tool holder, thereby improving operational safety and processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a diagram of the long shaft (solid) workpiece currently being processed.

[0012] Figure 2 This is a top view of the structure for processing long tubular workpieces.

[0013] Figure 3 This is a diagram of the overall structure of the tool holder of this application.

[0014] Figure 4 This is a diagram of the exploded structure of the tool holder for this application.

[0015] Figure 5This is a diagram of the contraction structure of the tool holder for this application.

[0016] Figure 6 This is a structural diagram of the tool holder of this application being assembled on the tool holder.

[0017] Figure 7 For this application Figure 3 Enlarged view of the structure at point A in the middle.

[0018] In the figure: 1a-embedded groove; 2a-circular ring; 4-tool holder; 5-tool; 6-long tubular workpiece. DETAILED DESCRIPTION

[0019] In order to enable ordinary technicians in the field to better understand the technical solution of the present application, the technical solution of the present application is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Refer to the attached Figures 1 to 7 The tool holder 1 is a long rod-shaped structure, the length of which is greater than the axial length of the tubular workpiece, and one end of the tool holder 1 is fixed to the tool holder of the machine tool, and the other end is equipped with a tool. When boring the inner hole of the long tubular workpiece, the tail end of the tool holder 1 is fixed to the tool holder through the bolts on the tool holder, and a boring tool is installed on the other end of the tool holder 1. Through the axial movement of the tool holder, the tool holder 1 and the boring tool are driven to extend into the inner cavity of the tubular workpiece, and the processing depth of the tool and the inner wall of the workpiece is adjusted, and the workpiece is driven to rotate through the main shaft of the machine tool at the same time, so as to realize the inner boring of the long tubular workpiece.

[0021] In order to solve the current difficulty faced by operators in loading and unloading the tool holder, the present application provides a reinforcing rod structure on the side of the tool holder 1 that contacts the inner wall of the tubular workpiece. The reinforcing rod structure can overcome the deformation (caused by external processing force) when the outer dimensions of the tool holder remain unchanged but the length increases, so that when the length of the tubular workpiece increases, the outer dimensions (width and thickness) of the tool holder do not need to be increased, and the weight of the tool holder body is reduced, so that the operator can quickly load and unload the tool holder on the tool holder, thereby improving the operation safety and processing efficiency.

[0022] Specifically, Figure 3 , 6 As shown, the reinforcing rod structure is a reinforcing rod 2 which is connected (preferably fixedly connected) at one end to the side wall of the tool holder 1 close to one end of the tool and detachably connected to the tool holder at the other end. Specifically, the other end of the reinforcing rod 2 is fastened by a screw on the tool holder.

[0023] In order to achieve the reinforcement effect on the tool support 1, the reinforcement rod 2 forms an angle with the tool support 1 (such as Figure 6As shown in the figure, through the inclined-pull structure, the reinforcing rod 2 forms a pulling effect on the distal end of the tool holder 1 (the end where the tool is mounted) based on the tool holder, so as to overcome the problem that the distal end of the tool holder is offset toward the axis of the workpiece due to the transmission of the reaction force of the workpiece to the tool, the bending of the tool holder and the insufficient processing accuracy. In addition, the problem that the outer dimensions of the tool holder 1 need to be increased synchronously to resist processing deformation when the length of the tool holder 1 is increased can be solved.

[0024] In order to further reduce the difficulty of assembling the above tool holder, Figure 4-5 As shown, the tool support 1 and the reinforcing rod 2 are both telescopic rod structures, which include a fixed support 11 and a telescopic support 12, a fixed rod body 21 and a telescopic rod body 22 in sequence, and the outer walls of the fixed support 11 and the fixed rod body 21 are penetrated with fastening bolts 3 which can be respectively tightened on the telescopic support 12 and the telescopic rod body 22. Before assembly, first disassemble the tool support 1 and the reinforcing rod 2 into the following Figure 4 The split structure shown in FIG. 1 is first assembled on the tool holder of the machine tool by the fixing bracket 11 and the fixing rod body 21 (preferably, as shown in FIG. 1 ). Figure 3 As shown, a ring is provided at the end of the fixed rod body 21, which can embed the screw on the knife seat to ensure the tightness of the assembly of the fixed rod body 21 and the knife seat. At the same time, an embedding groove that matches the screw on the knife seat can be opened on the tail surface of the fixed bracket 11, which can also achieve a stable assembly of the fixed bracket 11 and the knife seat). Then, the telescopic bracket 12 and the telescopic rod body 22 are respectively inserted into the fixed bracket 11 and the fixed rod body 21, and the overall assembly of the tool bracket is achieved by tightening the fastening bolt 3. After the tool bracket is separated during assembly, the weight of each assembly can be reduced, thereby further reducing the difficulty of assembling the tool bracket.

[0025] During the boring operation, the tool holder continuously moves axially toward the inner cavity of the workpiece, and the inner wall of the workpiece exerts a reaction force on the tool rod body toward the rear of the tool holder through the tool. Therefore, in order to avoid the problem that the tool holder 1 and the reinforcing rod 2 are retracted due to the reaction force and affect the processing accuracy, Figure 7 As shown, an oblique groove a which forms an angle with the axis is provided on the outer wall of the telescopic bracket 12 and the telescopic rod body 22, and the fastening bolts 3 are all pressed against the oblique groove a. After the tool bracket 1 and the reinforcing rod are penetrated and assembled, the fastening bolts 3 are screwed and pressed against the inner bottom surface of the oblique groove a. Since the inner bottom surface of the oblique groove a is a slope structure, the axial sliding of the fastening bolts 3 therein can be limited, and the axial retraction of the telescopic bracket 12 and the telescopic rod body 22 can be limited, thereby ensuring the stability of the tool bracket 1 after assembly, overcoming the reaction force during workpiece processing, and ensuring the processing accuracy of the boring hole.

[0026] The principle of the present invention is that before assembling the long tubular workpiece on the machine tool spindle for boring operation, the tool support 1 is assembled. During assembly, the tool support 1 and the reinforcing rod 2 are first disassembled into the following Figure 4 The split structure shown in the figure is firstly assembled on the tool holder of the machine tool by the fixed bracket 11 and the fixed rod body 21, and then the telescopic bracket 12 and the telescopic rod body 22 are respectively inserted into the fixed bracket 11 and the fixed rod body 21, and the overall length of the high tool bracket 1 is adjusted to completely realize the inner wall boring of the workpiece, and then the fastening bolt 3 is tightened and pressed against the inner bottom surface of the inclined groove a. Since the inner bottom surface of the inclined groove a is a slope structure, the axial sliding of the fastening bolt 3 therein can be limited, and the axial retraction of the telescopic bracket 12 and the telescopic rod body 22 can be limited, thereby ensuring the stability of the tool bracket 1 after assembly, overcoming the reaction force during workpiece processing, and ensuring the processing accuracy of the boring hole.

[0027] The above shows and describes the basic principles, main features and advantages of the present application. Without departing from the spirit and scope of the present application, the present application may have various changes and improvements, which fall within the scope of the present application to be protected.

Claims

1. A tool holder for boring inner holes of a long tubular workpiece, the tool holder (1) being a long rod-shaped structure, the length of which is greater than the axial length of the tubular workpiece, and one end of the tool holder (1) being fixed to a tool holder of a machine tool, and the other end being equipped with a tool, characterized in that: A reinforcing rod structure is arranged on the side of the tool support (1) that is in contact with the inner wall of the tubular workpiece.

2. The tool holder according to claim 1, characterized in that: The reinforcing rod structure comprises a reinforcing rod (2) having one end connected to a side wall of a tool support (1) close to one end of the tool and the other end detachably connected to the tool holder, and the reinforcing rod (2) forms an angle with the tool support (1).

3. The tool holder according to claim 2, characterized in that: The tool support (1) and the reinforcing rod (2) are both telescopic rod structures, which sequentially comprise a fixed support (11) and a telescopic support (12), a fixed rod body (21) and a telescopic rod body (22), and fastening bolts (3) which can be respectively tightened on the telescopic support (12) and the telescopic rod body (22) are provided on the outer walls of the fixed support (11) and the fixed rod body (21).

4. The tool holder according to claim 3, characterized in that: An oblique groove (a) forming an angle with the axis is provided on the outer wall of the telescopic bracket (12) and the telescopic rod body (22), and the fastening bolts (3) are tightened in the oblique groove (a).

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