Knurling tool suitable for machining knurls on numerical control machine tool

Abstract

The utility model discloses a knurling tool suitable for processing knurls on a numerical control machine tool. The knurling tool comprises a mounting block, a groove is formed in the mounting block; a hinge shaft is arranged on the mounting block; a first cutter assembly and a second cutter assembly are arranged on the hinge shaft to form a knurling cutter group; the first cutter assembly comprises a first cutter handle and a first knurl wheel; the second cutter assembly comprises a second cutter handle and a second knurl wheel; a through hole is formed in the bottom of the groove; a T-shaped push rod is arranged between the mounting block and the knurling cutter group; a compression spring is arranged between the first cutter handle and the second cutter handle, and an adjusting screw is arranged in the through hole. According to the knurling tool suitable for machining the knurls on the numerical control machine tool, the influence on the main shaft can be avoided during machining through a specific structure, and the knurling tool can be suitable for workpieces of different sizes and is wide in application range. Besides, when the knurling tool is subjected to tool setting, automatic centering can be achieved, the production efficiency is improved, and the product quality problem caused by the tool setting precision problem is effectively avoided.

Description

Technical Field

[0001] The utility model relates to a knurling tool, in particular to a knurling cutter suitable for knurling on a numerical control machine tool. Background Art

[0002] Knurling is a mechanical process of forming patterns on the handle or other working surfaces of metal products by extrusion. The main function of knurling is anti-slip. In the prior art, a knurling cutter is usually used for knurling processing. The knurling cutter generally includes a knurling wheel and a tool holder for mounting the knurling wheel. The knurling wheel is rotatably connected to the tool holder. When knurling operation needs to be performed on a workpiece, the workpiece is installed on the machine tool and driven by the machine tool to rotate. The knurling wheel contacts the surface of the workpiece, and patterns are left on the surface of the workpiece through extrusion.

[0003] At present, there are two types of tools for knurling processing on the market. One has a single knurling wheel, and the other has a pair of opposed knurling wheels. The single-wheel knurling cutter can only process straight lines, and the double-wheel knurling cutter can process grid patterns and is more widely used. However, whether it is a single-wheel knurling cutter or a double-wheel knurling cutter, when knurling on a numerical control machine tool, the knurling cutter extrudes the workpiece from one side, which will cause the workpiece to be subjected to a radial force and easily damage the spindle of the machine tool. In addition, the double-wheel knurling cutter also has the problem of difficult centering, and it often takes a long time to align the tool. The above problems make the existing knurling cutters not suitable for use on numerical control machine tools, resulting in low knurling processing efficiency and high costs. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present application provides a knurling cutter suitable for knurling on a numerical control machine tool. The knurling cutter suitable for knurling on a numerical control machine tool according to the present application has a specific structure, so that the two knurling wheels clamp the workpiece during processing, and the two radial forces acting on the workpiece upward and downward cancel each other out, thereby avoiding affecting the spindle. In addition, the specific structural design enables it to be applicable to workpieces of different sizes, with a wide application range. In addition, when the knurling cutter of the present application is aligning the tool, it can automatically center, improve production efficiency, and effectively avoid product quality problems caused by tool alignment accuracy problems.

[0005] The technical solution of the present application is as follows:

[0006] A knurling tool suitable for knurling on a CNC machine tool comprises a mounting block; a groove is provided on the mounting block to form an articulated seat structure; an articulated shaft is provided on the mounting block; a first tool assembly and a second tool assembly used in conjunction with each other are provided on the articulated shaft to form a knurling tool set; the first tool assembly comprises a first tool handle and a first knurling wheel articulated on the first tool handle, and the root of the first tool handle is articulated with the articulated shaft; the second tool assembly comprises a second tool handle and a second knurling wheel articulated on the second tool handle, and the root of the second tool handle is articulated with the articulated shaft; a through hole; a T-shaped push rod is provided between the mounting block and the knurling tool assembly; one end of the T-shaped push rod is located in the through hole and can slide, and the other end is in contact with the knurling assembly; the roots of the first tool handle and the second tool handle are respectively processed with a first arc surface and a second arc surface, and the first arc surface and the second arc surface are symmetrical with respect to the hinge axis; a compression spring is provided between the first tool handle and the second tool handle, and correspondingly, an adjusting screw is provided in the through hole, and the adjusting screw supports the T-shaped push rod for limiting; when in use, the opening and closing angle between the first tool handle and the second tool handle can be adjusted by rotating the adjusting screw.

[0007] Compared with the prior art, the knurling tool of the present application, which is suitable for knurling on a CNC machine tool, is provided with a knurling tool group. When in use, the adjusting screw can be loosened to leave moving space for the T-shaped push rod, so that the two tool assemblies can rotate and open around the hinge axis under the action of the compression spring; move to the workpiece position, and then re-tighten the adjusting screw, so that the two tool assemblies can clamp the workpiece from the upper and lower sides; thereby, the two radial forces of the two knurling wheels on the workpiece upward and downward offset each other during processing, thereby avoiding affecting the main shaft; and the opening and closing angle between the two tool assemblies can be freely adjusted by rotating the adjusting screw, so that the knurling tool of the present application can perform knurling processing on workpieces of different sizes.

[0008] As an optimization, in the aforementioned knurling tool suitable for knurling on a CNC machine tool, a first spring mounting groove is provided on the first tool handle, and a second spring mounting groove is provided on the second tool handle; the two ends of the compression spring are respectively located in the first spring mounting groove and the second spring mounting groove. With this structure, the two ends of the compression spring are respectively placed in the first spring mounting groove and the second spring mounting groove, and it is only necessary to open the mounting groove on the tool handle, which is more convenient for processing. Furthermore, the depth of the first spring mounting groove is not less than 5mm, and correspondingly, the depth of the second spring mounting groove is not less than 5mm. With this structure, the depth of the spring mounting groove is not less than 5mm, which can ensure that the compression spring will not detach during use, and the reliability is higher.

[0009] As an optimization, in the knurling tool suitable for machining knurling on a numerically controlled machine tool as described above, one end of the hinge shaft extends out of the mounting block and is hinged to the clamping block; an opening groove is provided at the hinge hole on the clamping block, and correspondingly, a locking screw is provided on the clamping block; when the locking screw is tightened, the clamping block is fixedly connected to the hinge shaft; meanwhile, a fixing member is provided on the mounting block for fixing the hinge shaft. With this structure, during use, first loosen the locking screw so that the clamping block and the hinge shaft can rotate relative to each other. During the process of clamping the workpiece by the first tool assembly and the second tool assembly (tool alignment), the mounting block can rotate, thereby realizing tool alignment self-centering, with high tool alignment efficiency, thus improving production efficiency and effectively avoiding product quality problems caused by tool alignment accuracy issues. Further, on the mounting block, on both sides of the knurling tool set, a fixing member is respectively provided.

[0010] As an optimization, in the knurling tool suitable for machining knurling on a numerically controlled machine tool as described above, the fixing member is a pin, and correspondingly, a pin hole is provided on the mounting block; the fixing member and the pin hole are connected by a screw pair, so that the hinge shaft can be circumferentially limited by tightening the fixing member. With this specific structure, while ensuring the reliability of the locking structure, the machining is relatively convenient. Further, the outer end of the fixing member has an internal hexagonal shape. With this structure, the internal hexagonal structure is convenient for operation in places with limited space such as numerically controlled machine tools. Still further, the heads of the adjusting screw and the locking screw are both provided with an internal hexagonal shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural view of the knurling tool suitable for machining knurling on a numerically controlled machine tool in the closed state Figure 1 ;

[0012] Figure 2 is Figure 1 a cross-sectional view;

[0013] Figure 3 is a schematic structural view of the knurling tool suitable for machining knurling on a numerically controlled machine tool in the closed state Figure 2 ;

[0014] Figure 4 is a schematic structural view of the knurling tool suitable for machining knurling on a numerically controlled machine tool in the open state Figure 1 ;

[0015] Figure 5 is a schematic structural view of the knurling tool suitable for machining knurling on a numerically controlled machine tool in the open state Figure 2 ;

[0016] Figure 6 is a schematic structural view of the knurling tool suitable for machining knurling on a numerically controlled machine tool during machining (the mounting block is inclined);

[0017] Figure 7 Yes Figure 6 Schematic structural diagram when clamping the workpiece.

[0018] The reference signs in the drawings are: 1 - mounting block, 11 - groove, 12 - through hole; 2 - hinge shaft; 3 - fixing member; 4 - first cutting tool assembly, 41 - first tool shank, 411 - first arc surface, 412 - first spring mounting groove, 42 - first knurling wheel; 5 - second cutting tool assembly, 51 - second tool shank, 511 - second arc surface, 512 - second spring mounting groove, 52 - second knurling wheel; 6 - T-shaped push rod; 7 - compression spring; 8 - adjusting screw; 9 - clamping block, 91 - opening groove, 92 - locking screw. Specific embodiments

[0019] The present application will be further described below in conjunction with the drawings and embodiments, but it shall not be used as a basis for limiting the present application.

[0020] Embodiment (see Figures 1 to 7 ):

[0021] A knurling tool suitable for knurling on a numerically controlled machine tool, comprising a mounting block 1; a groove 11 is provided on the mounting block 1 to form a hinge seat structure; a hinge shaft 2 is provided on the mounting block 1; a first cutting tool assembly 4 and a second cutting tool assembly 5 are provided on the hinge shaft 2 for matching use to form a knurling tool set; the first cutting tool assembly 4 includes a first tool shank 41 and a first knurling wheel 42 hinged to the first tool shank 41, and the root of the first tool shank 41 is hinged to the hinge shaft 2; the second cutting tool assembly 5 includes a second tool shank 51 and a second knurling wheel 52 hinged to the second tool shank 51, and the root of the second tool shank 51 is hinged to the hinge shaft 2; a through hole 12 penetrating the mounting block 1 is provided at the bottom of the groove 11; a T-shaped push rod 6 is provided between the mounting block 1 and the knurling tool set; one end of the T-shaped push rod 6 is located in the through hole 12 and can slide, and the other end abuts against the knurling assembly; first arc surfaces 411 and second arc surfaces 511 are respectively machined at the roots of the first tool shank 41 and the second tool shank 51, and the first arc surfaces 411 and the second arc surfaces 511 are symmetric with respect to the hinge shaft 2; a compression spring 7 is provided between the first tool shank 41 and the second tool shank 51, and correspondingly, an adjusting screw 8 is provided in the through hole 12, and the adjusting screw 8 abuts against the T-shaped push rod 6 for limiting; during use, the opening and closing angle between the first tool shank 41 and the second tool shank 51 can be adjusted by rotating the adjusting screw 8.

[0022] In this embodiment, a first spring mounting groove 412 is provided on the first tool handle 41, and a second spring mounting groove 512 is provided on the second tool handle 51; both ends of the compression spring 7 are respectively located in the first spring mounting groove 412 and the second spring mounting groove 512. With this structure, for the connection method of placing both ends of the compression spring 7 in the first spring mounting groove 412 and the second spring mounting groove 512 respectively, only mounting grooves need to be opened on the tool handle, and the processing is relatively convenient.

[0023] In this embodiment, the depth of the first spring mounting groove 412 is 5 mm. Correspondingly, the depth of the second spring mounting groove 512 is 5 mm. With this structure, a depth of 5 mm for the spring mounting groove can ensure that the compression spring 7 will not come off during use, and the reliability is relatively high.

[0024] In this embodiment, one end of the hinge shaft 2 extends out of the mounting block 1 and is hinged to the clamping block 9; an opening groove 91 is provided at the hinge hole of the clamping block 9. Correspondingly, a locking screw 92 is provided on the clamping block 9; when the locking screw 92 is tightened, the clamping block 9 is fixedly connected to the hinge shaft 2; at the same time, a fixing member 3 is provided on the mounting block 1 for fixing the hinge shaft 2; on the mounting block 1, one fixing member 3 is provided on each side of the knurling tool set. With this structure, during use, first loosen the locking screw 92 so that the clamping block 9 and the hinge shaft 2 can rotate relative to each other, and then tighten the adjusting screw 8. During the process of the first tool assembly 4 and the second tool assembly 5 clamping the workpiece, the mounting block 1 can rotate, thereby realizing tool setting self-centering, with high tool setting efficiency, thus improving the production efficiency and effectively avoiding product quality problems caused by tool setting accuracy problems.

[0025] In this embodiment, the fixing member 3 is a pin, and corresponding pin holes are provided on the mounting block 1; the fixing member 3 and the pin holes are connected by a screw pair, so that the hinge shaft 2 can be circumferentially limited by tightening the fixing member 3. With this specific structure, while ensuring the reliability of the locking structure, the processing is relatively convenient.

[0026] In this embodiment, the outer end of the fixing member 3 has an internal hexagonal shape; the heads of the adjusting screw 8 and the locking screw 92 are both provided with an internal hexagonal shape. With this structure, the internal hexagonal structure is convenient for operation in places with a narrow space such as a numerical control machine tool.

[0027] When the knurling tool suitable for machining knurling on a numerical control machine tool in this embodiment is used, the clamping block 8 is clamped on the fixture of the numerical control machine tool; the adjusting screw 8 is loosened, and the first tool assembly 4 and the second tool assembly 5 automatically rotate and open under the spring force of the compression spring 7; the locking screw 92 is loosened to enable the mounting block 1 to rotate freely; the fixture is moved so that the first tool assembly 4 and the second tool assembly 5 are respectively located on the upper and lower sides of the workpiece; the adjusting screw 8 is tightened, the T-shaped push rod 6 moves, so that the first tool assembly 4 and the second tool assembly 5 rotate and clamp the workpiece. At the same time, the mounting block 1 automatically turns to a suitable angle to realize tool setting and self-centering; after the workpiece is clamped, the locking screw 92 is tightened.

[0028] It should be noted that the knurling tool of the present invention is developed according to the use requirements of numerical control machine tools, but is not limited to being used on numerical control machine tools and can also be used on ordinary machine tools.

[0029] The above general description of the utility model involved in this application and the description of its specific implementation manners should not be construed as a limitation on the technical solution of the utility model. Those skilled in the art can, based on the disclosure of this application, without departing from the constituent elements of the utility model involved, add, subtract, or combine the disclosed technical features in the above general description or / and specific implementation manners (including embodiments) to form other technical solutions that fall within the protection scope of this application.

Claims

1. A knurling tool suitable for machining knurling on a numerically controlled machine tool, characterized in that: It includes an installation block (1); a groove (11) is provided on the installation block (1) to form a hinge seat structure; a hinge shaft (2) is provided on the installation block (1); a first tool assembly (4) and a second tool assembly (5) used in cooperation are provided on the hinge shaft (2) to form a knurling tool set; the first tool assembly (4) includes a first tool handle (41) and a first knurling wheel (42) hinged to the first tool handle (41), and the root of the first tool handle (41) is hinged to the hinge shaft (2); the second tool assembly (5) includes a second tool handle (51) and a second knurling wheel (52) hinged to the second tool handle (51), and the root of the second tool handle (51) is hinged to the hinge shaft (2). A through hole (12) penetrating the installation block (1) is provided at the bottom of the groove (11); a T-shaped push rod (6) is provided between the installation block (1) and the knurling tool set; one end of the T-shaped push rod (6) is located in the through hole (12) and can slide, and the other end abuts against the knurling assembly; first arc surfaces (411) and second arc surfaces (511) are respectively machined at the roots of the first tool handle (41) and the second tool handle (51), and the first arc surfaces (411) and the second arc surfaces (511) are symmetric with respect to the hinge shaft (2); a compression spring (7) is provided between the first tool handle (41) and the second tool handle (51), correspondingly, an adjusting screw (8) is provided in the through hole (12), and the adjusting screw (8) holds the T-shaped push rod (6) in place for limit; during use, the opening and closing angle between the first tool handle (41) and the second tool handle (51) can be adjusted by rotating the adjusting screw (8).

2. The knurling tool suitable for machining knurling on a numerically controlled machine tool according to claim 1, characterized in that: A first spring installation groove (412) is provided on the first tool handle (41), and a second spring installation groove (512) is provided on the second tool handle (51); both ends of the compression spring (7) are respectively located in the first spring installation groove (412) and the second spring installation groove (512).

3. The knurling tool suitable for machining knurling on a numerically controlled machine tool according to claim 2, characterized in that: The depth of the first spring installation groove (412) is not less than 5 mm, correspondingly, the depth of the second spring installation groove (512) is not less than 5 mm.

4. The knurling tool suitable for machining knurling on a numerically controlled machine tool according to claim 3, characterized in that: One end of the hinge shaft (2) extends out of the installation block (1) and is hinged to a clamping block (9); an opening groove (91) is provided at the hinge hole of the clamping block (9), correspondingly, a locking screw (92) is provided on the clamping block (9); when the locking screw (92) is tightened, the clamping block (9) is fixedly connected to the hinge shaft (2); meanwhile, a fixing member (3) is provided on the installation block (1) for fixing the hinge shaft (2).

5. The knurling tool suitable for machining knurling on a numerically controlled machine tool according to claim 4, characterized in that: On the installation block (1), one fixing member (3) is respectively provided on both sides of the knurling tool set.

6. The knurling tool suitable for machining knurling on a numerically controlled machine tool according to claim 5, wherein: The fixing member (3) is a pin, and corresponding pin holes are provided on the installation block (1); the fixing member (3) is connected to the pin holes through a screw pair, so that the hinge shaft (2) can be circumferentially limited by tightening the fixing member (3).

7. The knurling tool suitable for machining knurling on a numerically controlled machine tool according to claim 6, characterized in that: The outer end of the fixing member (3) has an internal hexagon shape.

8. The knurling tool suitable for machining knurling on a numerically controlled machine tool according to any one of claims 1-5 or 7, characterized in that: The heads of the adjusting screw (8) and the locking screw (92) both have an internal hexagon shape.

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