Drum inner cavity tool structure

Abstract

The present invention relates to the technical field of turning tools, and specifically, to a drum inner cavity tool structure, including a tool holder and a tool rod. The tool rod is hinged to the tool holder. A pushing rod is slidably provided inside the tool holder. The length direction of the pushing rod is parallel to the length direction of the tool holder. One end of the pushing rod is provided with a pushing portion in cooperation with the tool holder, so that when the pushing portion pushes the tool holder, the tool holder gradually deflects to be perpendicular to the tool holder. The tool holder and the tool head are arranged as a rotatable structure so that the angle between the two can be easily adjusted, thereby ensuring that the tool head can easily enter and exit the workpiece. At the same time, in this process, there is no need to separate the tool holder, the tool holder, the tool head and the feed mechanism, so as to avoid the trouble of repeated clamping and the difficulty in controlling the precision due to repeated clamping.

Description

Technical Field

[0001] The invention relates to the technical field of turning tools, and in particular to a drum inner cavity tool structure. Background Art

[0002] In mechanical processing, we often encounter some special-shaped structures. These special-shaped structures are difficult to process with standard processing equipment, and are generally processed with special tools. Figure 1 The workpiece is cylindrical in shape. Its inner diameter is larger than the opening diameter of the port. When machining its inner wall, the tool needs to be fed horizontally into the inner wall of the workpiece. Since the opening of the workpiece is small, the longer tool cannot directly descend and enter the workpiece through the opening of the workpiece.

[0003] In the prior art, the tool is usually placed inside the workpiece separately and then the tool holder is moved inside the workpiece to connect with the tool. After each processing is completed, the tool needs to be removed from the workpiece and then re-clamped for the next processing. This method makes the connection of the tool very troublesome. At the same time, repeated clamping also makes it difficult to ensure accuracy. Summary of the invention

[0004] The object of the present invention is to provide a drum inner cavity tool structure, which can facilitate the tool to enter the inner cavity of a drum-type workpiece.

[0005] The embodiments of the present invention are implemented by the following technical solutions:

[0006] A drum inner cavity tool structure comprises a tool holder and a tool rod; the tool rod is hinged to the tool holder; a pushing rod is slidably arranged inside the tool holder; the length direction of the pushing rod is parallel to the length direction of the tool holder; one end of the pushing rod is provided with a pushing portion to cooperate with the tool rod, so that when the pushing portion pushes the tool rod, the tool rod gradually deflects to be perpendicular to the tool holder.

[0007] Furthermore, the end of the tool holder away from the tool rod is a clamping section; the tool holder is provided with an adjusting shaft near the clamping section; the adjusting shaft is provided with an active bevel gear; a driven bevel gear meshing with the active bevel gear is provided inside the tool holder; the tightening rod is passed through and threadedly connected to the driven bevel gear; the adjusting shaft is provided perpendicular to the tool holder.

[0008] Furthermore, the knife rod is provided with a rotating block; two support seats are provided opposite to each other at the end of the knife seat; the rotating block is provided between the two support seats and is hinged to the support seats; the rotating block is provided with a tightening piece; the pushing rod is provided with a wedge-shaped pushing block in cooperation with the tightening piece, so that when the pushing block pushes the tightening piece, the tightening piece gradually tightens the support seat.

[0009] Furthermore, the pushing portion is telescopically arranged at the end of the pushing rod; a pushing spring is also arranged between the pushing portion and the pushing rod, so that when the pushing portion presses the knife rod through the pushing spring, the pushing block is pushed to abut against the pressing piece.

[0010] Furthermore, the tightening pieces are arranged on both sides of the rotating block; and a gap for the pushing block to be inserted is arranged between the tightening piece and the rotating block.

[0011] Furthermore, the rotating block is provided with a screw hole; the knife rod is threadedly connected to the screw hole.

[0012] Furthermore, a connector is provided at the end of the knife rod; the connector is in a step shape; the step surface of the upper step is recessed with a positioning groove; the step surface of the lower step is protruding with a positioning protrusion; and the connector is also provided with a threaded hole.

[0013] Furthermore, two threaded holes are provided.

[0014] Furthermore, the tool holder is provided with an axial hole for accommodating the adjusting shaft; the end of the adjusting shaft is embedded in the axial hole; and the end surface of the adjusting shaft is provided with a hexagonal connecting hole.

[0015] The technical solution of the embodiment of the present invention has at least the following advantages and beneficial effects:

[0016] When the drum inner cavity tool structure of the present invention is used, the tool holder is clamped on the feed mechanism of the machine tool. The degree to which the pushing rod tightens the tool rod is adjusted so that the pushing rod tightens the tool rod. At this time, the angle between the tool rod and the tool holder is limited to 90 degrees. At this time, cutting processing can be performed by the tool head connected to the tool rod. When the tool rod enters the inside of the drum-shaped workpiece, the pushing rod is loosened so that the angle of the tool rod can be adjusted to be parallel to the tool holder. At this time, the tool rod equipped with the tool head can be easily inserted into the inside of the workpiece. After the tool head enters the workpiece, the tool rod is pushed to 90 degrees by the pushing rod and is locked. In practice, there is no need to adjust the tool rod to be parallel to the tool holder during the process of the tool head entering and exiting the workpiece, but the angle between the tool rod and the tool holder is adjusted as needed so that the tool head can enter the workpiece.

[0017] The tool bar and the tool head are set to a rotatable structure so that the angle between them can be easily adjusted, thereby ensuring that the tool head can easily enter and exit the workpiece. At the same time, during this process, the tool bar, tool holder, tool head and feed mechanism do not need to be separated, avoiding the trouble of repeated clamping and also avoiding the difficulty in controlling the precision caused by repeated clamping.

[0018] The adjusting shaft, the active bevel gear and the driven bevel gear are matched to make it possible to rotate the adjusting shaft from the side of the tool holder. The adjusting shaft is always exposed to the outside, which is convenient for adjusting the angle between the tool bar and the tool holder.

[0019] The cooperation between the pushing block and the tightening piece enables the tightening piece to be stably tightened against the support seat, thereby ensuring that the rotating block will not rotate during use. The setting of the tightening spring allows the tightening part to first contact the tool rod, and then push the tool rod to be perpendicular to the tool seat, and then the pushing block and the tightening piece are used to make the tightening piece stably tightened against the support seat. The tool rod and the rotating block are connected by a thread, so that the length of the tool rod extending from the side of the tool seat can be adjusted, thereby making the tool setting more flexible. The connection head of the tool rod allows the tool head to be clamped quickly and stably, and also allows the tool head to be replaced as needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a diagram showing the tool head entering the workpiece. Figure 1 ;

[0022] Figure 2 This is a diagram showing the tool head entering the workpiece. Figure 2 ;

[0023] Figure 3 This is a diagram showing the tool head entering the workpiece. Figure 3 ;

[0024] Figure 4 This is a schematic diagram when the tool bar is perpendicular to the tool holder;

[0025] Figure 5 It is a schematic diagram when the tool bar is tilted to the tool holder;

[0026] Figure 6 It is a schematic diagram of the structure inside the knife holder;

[0027] Figure 7 Schematic diagram of the tool bar.

[0028] Icon: 1-workpiece, 2-tool holder, 3-tool rod, 4-pushing rod, 5-pushing part, 6-clamping section, 7-adjusting shaft, 8-active bevel gear, 9-driven bevel gear, 10-rotating block, 11-support seat, 12-tensioning plate, 13-pushing block, 14-pushing spring, 15-screw hole, 16-connecting head, 17-positioning groove, 18-positioning protrusion, 19-threaded hole, 20-feed mechanism, 21-tool head. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Example:

[0031] like Figure 1-Figure 7 As shown, the present invention provides a drum inner cavity tool structure, including a tool holder 2 and a tool rod 3. The tool holder 2 is used to connect to the feed mechanism 20 of the machine tool, and the tool rod 3 is used to connect to the tool head 21, so that the tool head 21 is connected to the feed mechanism 20 and performs cutting processing on the inner wall of the workpiece 1 under the support of the feed mechanism 20. The tool rod 3 is hinged to the tool holder 2, so that the tool rod 3 can rotate to be perpendicular to the tool holder 2 or parallel to the tool holder 2. A pushing rod 4 is slidably provided inside the tool holder 2. The length direction of the pushing rod 4 is parallel to the length direction of the tool holder 2. One end of the pushing rod 4 is provided with a pushing portion 5 in cooperation with the tool rod 3, so that when the pushing portion 5 pushes the tool rod 3, the tool rod 3 gradually deflects to be perpendicular to the tool holder 2.

[0032] When the drum inner cavity tool structure of the present invention is used, the tool holder 2 is clamped on the feed mechanism 20 of the machine tool. The degree to which the pushing rod 4 presses the tool rod 3 is adjusted so that the pushing rod 4 presses the tool rod 3. Since the pushing rod 4 presses the tool rod 3, the angle between the tool rod 3 and the tool holder 2 is limited to 90 degrees. At this time, cutting processing can be performed by the tool head 21 connected to the tool rod 3. When the tool rod 3 enters the interior of the drum-shaped workpiece 1, the pushing rod 4 is loosened so that the angle of the tool rod 3 can be adjusted to be parallel to the tool holder 2. At this time, the tool rod 3 equipped with the tool head 21 can be easily inserted into the interior of the workpiece 1. After the tool head 21 enters the workpiece 1, the tool rod 3 is pushed to 90 degrees by the pushing rod 4 and is locked. In practice, the process of placing the tool head 21 into the workpiece 1 is as follows. Figure 1-Figure 3 As shown, when the cutter head 21 enters and exits the workpiece 1, it is not necessary to adjust the cutter bar 3 to be parallel to the cutter seat 2. Instead, the angle between the cutter bar 3 and the cutter seat 2 can be adjusted as needed so that the cutter head 21 can enter the workpiece 1. The process of taking the cutter head 21 out of the workpiece 1 is the reverse operation of the insertion process.

[0033] The tool bar 3 and the tool head 21 are arranged to be rotatable so that the angle between them can be conveniently adjusted, thereby ensuring that the tool head 21 can easily enter and exit the workpiece 1. At the same time, in this process, the tool bar 3, the tool holder 2, the tool head 21 and the feed mechanism 20 do not need to be separated, avoiding the trouble of repeated clamping and also avoiding the difficulty in controlling the precision caused by repeated clamping.

[0034] It should be noted that the feed mechanism 20 of the machine tool is used for feeding, and it has the ability to rise and fall, rotate and translate in the horizontal plane. When the tool is clamped in the feed mechanism 20, its relative position with the feed mechanism 20 can be recorded by the machine tool. This position can be used as a basis for subsequent processing.

[0035] In this embodiment, the end of the tool holder 2 away from the tool rod 3 is a clamping section 6, which is used to be clamped by the mechanism to complete the connection between the tool and the machine tool. The tool holder 2 is provided with an adjustment shaft 7 near the clamping section 6. Figure 6 As shown, the tool holder 2 is provided with an axial hole for accommodating the adjustment shaft 7. The end of the adjustment shaft 7 is embedded in the axial hole. The end face of the adjustment shaft 7 is provided with a hexagonal connection hole. This makes it easy to actively adjust the shaft 7 by using a tool such as a hexagonal screwdriver. The adjustment shaft 7 is provided with an active bevel gear 8. A driven bevel gear 9 meshing with the active bevel gear 8 is provided inside the tool holder 2. The push rod 4 is penetrated through the driven bevel gear 9 and is threadedly connected to the driven bevel gear 9. Rotating the adjustment shaft 7 can drive the driven bevel gear 9, thereby causing the push rod 4 threadedly connected to the driven bevel gear 9 to extend and retract. The adjustment shaft 7 is arranged perpendicular to the tool holder 2.

[0036] The adjustment shaft 7 can be rotated from the side of the knife seat 2 by the cooperation of the adjustment shaft 7, the active bevel gear 8 and the driven bevel gear 9. The position of the adjustment shaft 7 is always exposed to the outside, which is convenient for adjusting the angle between the knife bar 3 and the knife seat 2.

[0037] In this embodiment, the knife bar 3 is provided with a rotating block 10. Figure 6 As shown, two support seats 11 are arranged opposite to each other at the end of the knife seat 2. The rotating block 10 is arranged between the two support seats 11 and is hinged to the support seat 11. The rotating block 10 is provided with a tightening piece 12. Tightening pieces 12 are arranged on both sides of the rotating block 10. A gap is arranged between the tightening piece 12 and the rotating block 10 for the pushing block 13 to be inserted. A slope is arranged on the side of the tightening piece 12 close to the gap. The pushing rod 4 is provided with a wedge-shaped pushing block 13 in cooperation with the tightening piece 12, so that when the pushing block 13 pushes the slope of the tightening piece 12, the tightening piece 12 gradually opens outward and tightens the support seat 11. This also enables the tightening piece 12 to be stably tightened to the support seat 11, thereby ensuring that the rotating block 10 will not rotate during use. In practice, the width of the gap is equivalent to the width of the pushing block 13, so that the two sides of the gap are moved away from each other by the squeezing of the pushing block 13 when the pushing block 13 enters the gap. That is to say, when the pushing block 13 enters the gap, the pushing rod 4 only needs to push the pushing block 13 into the gap, and the pushing rod 4 will not be subjected to lateral reaction force.

[0038] In order to ensure that the pushing portion 5 can push the knife bar 3 to a horizontal state when squeezing the knife bar 3, the rotating block 10 is set in a rectangular shape and the part of the pushing portion 5 that cooperates with the rotating block 10 is set in a flat shape. When the pushing portion 5 pushes the rotating block 10, if the plane of the pushing portion 5 does not completely fit with the surface of the rotating block 10, the knife bar 3 will be driven to rotate. Only when the plane of the pushing portion 5 and the surface of the rotating block 10 are completely in contact, the two will not rotate relative to each other. At this time, the knife bar 3 is perpendicular to the knife seat 2.

[0039] In this embodiment, the pushing portion 5 is telescopically arranged at the end of the pushing rod 4. Figure 6 As shown, a pushing spring 14 is also provided between the pushing portion 5 and the pushing rod 4, so that when the pushing portion 5 pushes the knife bar 3 through the pushing spring 14, the pushing block 13 is pushed to abut against the pressing piece 12. That is to say, when in a relaxed state, the pushing portion 5 protrudes from the pushing block 13. When the pushing rod 4 is pushed forward, the pushing portion 5 first contacts the rotating block 10, and then the rotating block 10 rotates until the knife bar 3 is perpendicular to the knife seat 2. Subsequently, the pushing block 13 contacts the pressing piece 12 and pushes the pressing piece 12. In this process, the pushing spring ensures the effective execution of the entire process.

[0040] In this embodiment, the rotating block 10 is provided with a screw hole 15. The tool rod 3 is threadedly connected to the screw hole 15. The tool rod 3 and the rotating block 10 are threadedly connected, so that the length of the tool rod 3 extending from the side of the tool holder 2 is adjustable, thereby making the tool setting more flexible.

[0041] In this embodiment, a connector 16 is provided at the end of the knife rod 3. Figure 7 As shown, the connector 16 is provided with two threaded holes 19. The cutter head 21 and the cutter rod 3 are fixedly connected by screws. The connector 16 is in a step shape. The step surface of the upper step is recessed with a positioning groove 17. The step surface of the lower step is protruding with a positioning protrusion 18. Correspondingly, the connection part between the cutter head 21 and the cutter rod 3 is provided with the same structure, so that the two can fit tightly when connected. At the same time, the positioning grooves 17 and the positioning protrusions 18 of the two are embedded and matched with each other, so that the two cannot shake after being connected. The connection head 16 of the cutter rod 3 is set so that the cutter head 21 can be clamped quickly and stably, and also enables the cutter head 21 to be replaced as needed.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A drum inner cavity tool structure, characterized in that: It comprises a knife seat and a knife rod; the knife rod is hinged to the knife seat; a pushing rod is slidably arranged inside the knife seat; the length direction of the pushing rod is parallel to the length direction of the knife seat; one end of the pushing rod is matched with the knife rod and a pushing part is arranged, so that when the pushing part pushes the knife rod, the knife rod gradually deflects to be perpendicular to the knife seat; The end of the knife seat away from the knife rod is a clamping section; the knife seat is provided with an adjustment shaft near the clamping section; the adjustment shaft is provided with an active bevel gear; the knife seat is provided with a driven bevel gear meshing with the active bevel gear; the push rod is passed through and threadedly connected to the driven bevel gear; the adjustment shaft is arranged perpendicular to the knife seat; The knife bar is provided with a rotating block; two supporting seats are provided at the ends of the knife seat; the rotating block is provided between the two supporting seats and is hinged to the supporting seats; the rotating block is provided with a tightening sheet; the tightening rod is provided with a wedge-shaped pushing block in cooperation with the tightening sheet, so that when the pushing block pushes the tightening sheet, the tightening sheet gradually tightens the supporting seat; The pushing portion is telescopically arranged at the end of the pushing rod; a pushing spring is also arranged between the pushing portion and the pushing rod, so that when the pushing portion presses the knife rod through the pushing spring, the pushing block is pushed to abut against the pressing piece; The tightening pieces are arranged on both sides of the rotating block; and a gap for the pushing block to be inserted is arranged between the tightening piece and the rotating block.

2. The drum inner cavity tool structure according to claim 1, characterized in that: The rotating block is provided with a screw hole; the knife rod is threadedly connected to the screw hole.

3. The drum inner cavity tool structure according to claim 2, characterized in that: A connector is provided at the end of the knife rod; the connector is in a step shape; the step surface of the upper step is concavely provided with a positioning groove; the step surface of the lower step is convexly provided with a positioning protrusion; the connector is also provided with a threaded hole.

4. The drum inner cavity tool structure according to claim 3 is characterized in that: There are two threaded holes.

5. The drum inner cavity tool structure according to claim 4 is characterized in that: The knife seat is provided with an axial hole for accommodating the adjusting shaft; the end of the adjusting shaft is embedded in the axial hole; and the end surface of the adjusting shaft is provided with a hexagonal connecting hole.

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