A combination knife handle using NT50 to Capto C5 conversion

Abstract

This utility model provides a combined tool holder using an NT50 to Capto C5 converter, comprising an NT50 tool holder, a connecting plate, and a Capto C5 tool holder. The connecting plate has a first inner hole and a second inner hole. One end of the NT50 tool holder is used to simultaneously engage with the inner conical surface and end face of the spindle of a CNC turning and boring machine. The other end of the NT50 tool holder is fixedly connected to the connecting plate by multiple first bolts. The Capto C5 tool holder is fixedly connected to the connecting plate by multiple screws. The Capto C5 tool holder includes a core sleeve, which is inserted into the second inner hole and interference-fitted with it. The inner wall of the core sleeve is triangularly conical, with the edges of the triangularly conical cone evenly distributed circumferentially and forming arcs. A second bolt for fixing the tool is threaded into the second inner hole. This utility model can achieve a tool change time of less than 2 minutes, a tool change repeatability accuracy of less than 0.005 mm, excellent connection rigidity, and can achieve cutting operations with a length-to-diameter ratio of 5, meeting the requirements of cutting operations.

Description

Technical Field

[0001] This utility model relates to the field of cutting tool technology, specifically to a combination tool holder using an NT50 to Capto C5 converter. Background Technology

[0002] In the field of oilfield supporting equipment, there is an increasing demand for pump heads of three-cylinder, five-cylinder, and multi-cylinder high-pressure plungers used in cementing and fracturing operations. Currently, CNC turning and boring machines integrate the functions of a boring and milling spindle and a parallel disc spindle, allowing for rapid switching between the two axes. The parallel disc spindle uses an NT50 tool holder, and the minimum parallel distance between it and the boring and milling spindle is 130mm. The NT50 tool holder cannot meet the high-precision machining requirements of complex structures, and it is necessary to replace the NT50 tool holder with a Capto tool holder. However, replacing the Capto tool holder takes a long time and requires resetting the tool and adjusting the tool compensation program. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing a combination tool holder that uses an NT50 to Capto C5 converter, which can achieve a tool change time of less than 2 minutes, a tool change repeatability accuracy of less than 0.005 mm, excellent connection rigidity, and can achieve cutting operations with a length-to-diameter ratio of 5 times, thus meeting the requirements of cutting operations.

[0004] To solve the above-mentioned technical problems, this utility model provides a combination tool holder using NT50 to Capto C5 conversion, including NT50 tool holder, connecting plate, and Capto C5 tool holder;

[0005] The connecting plate is respectively provided with a first inner hole and a second inner hole;

[0006] One end of the NT50 tool holder is used to simultaneously engage with the inner conical surface and end face of the spindle of the CNC turning and boring machine. The other end of the NT50 tool holder is provided with a central positioning cylinder and a positioning plane. The central positioning cylinder is inserted into the first inner hole. The NT50 tool holder is fixedly connected to the connecting plate by multiple first bolts. The positioning plane is in close contact with the surface of the connecting plate.

[0007] The Capto C5 tool holder is fixedly connected to the connecting plate by multiple screws. The Capto C5 tool holder includes a core sleeve, which is inserted into a second inner hole and has an interference fit with the second inner hole. The inner wall of the core sleeve is a triangular cone, and the edges of the triangular cone are evenly distributed in the circumferential direction. The edges of the triangular cone are arc-shaped. A second bolt is threaded in the second inner hole. The second bolt is used to tighten and fix the tool corresponding to the Capto C5 tool holder in the Capto C5 tool holder.

[0008] In some embodiments, the NT50 tool holder includes a plurality of flat keys, and the NT50 tool holder is connected to a connecting plate via the flat keys.

[0009] In some embodiments, the flat key is clearance-fitted with the keyway of the NT50 tool holder.

[0010] In some embodiments, the central positioning cylinder is clearance-fitted with the first inner hole.

[0011] In some embodiments, a plurality of the first bolts are evenly distributed around the central positioning cylinder.

[0012] In some embodiments, the NT50 tool holder features a 7 / 24 taper design.

[0013] In some embodiments, the second inner hole includes a threaded hole and a mounting hole that are coaxially formed, the core sleeve is interference-fitted with the mounting hole, and one end of the second bolt is threadedly connected to the threaded hole and inserted into the core sleeve.

[0014] In some embodiments, the Capto C5 tool holder is transitionally engaged with a connecting plate via multiple cylindrical pins.

[0015] In some embodiments, the Capto C5 tool holder has a taper of 1:20 and is a hollow short taper.

[0016] In some embodiments, the plurality of screws are evenly distributed around the core sleeve.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. The NT50 tool holder of this utility model is a standard tool holder with high positioning accuracy. One end can simultaneously mate with the spindle and end face of the CNC turning and boring machine's rotary table, ensuring the positioning accuracy of the NT50 tool holder itself. The other end is precisely positioned through the central positioning cylinder and positioning plane, and is fastened with the first bolt, ensuring the fixing accuracy and rigidity transmission between the connecting plate and the NT50 tool holder. The Capto C5 tool holder and the connecting plate are fixed by interference fit and multiple screws, ensuring the connection accuracy and connection rigidity between the Capto C5 tool holder and the connecting plate. The Capto C5 tool holder uses a dual positioning mechanism of end face and conical surface for the tool. Under the tension of the second bolt, the Capto C5 tool holder generates elastic deformation, making the tool and the Capto C5 tool holder in close contact, achieving precise positioning. The axial and radial repeatability positioning accuracy is within 0.005mm, eliminating the need for tool resetting or tool compensation program adjustment. This enables cutting operations with a tool change time of less than 2 minutes and a length-to-diameter ratio of 5, meeting the requirements of cutting operations.

[0019] 2. The NT50 tool holder of this utility model is connected to the connecting plate through multiple flat keys, which further ensures the rigidity transmission between the connecting plate and the NT50 tool holder, and further disperses the cutting load to avoid local stress concentration.

[0020] 3. The clearance fit between the flat key and the NT50 tool holder in this utility model allows for slight adjustment space to compensate for machining errors or assembly tolerances.

[0021] 4. The connecting plate of this utility model and the Capto C5 tool holder adopt an interference fit, cylindrical pin transition positioning and screw uniform tightening to form a stable composite connection structure, which can effectively suppress cutting vibration.

[0022] 5. The connecting plate of this utility model serves as an intermediate transition component, which can be quickly disassembled and replaced, facilitating the maintenance or upgrading of the tool holder assembly and reducing usage costs. Attached Figure Description

[0023] Figure 1 This is an exploded view of the present invention;

[0024] Figure 2 This is a cross-sectional view of the present invention;

[0025] Figure 3 This is a cross-sectional view of the connection between the NT50 tool holder and the connecting plate of this utility model;

[0026] Figure 4 This is a cross-sectional view of the connection between the Capto C5 tool holder and the connecting plate of this utility model.

[0027] Attached reference numerals: 1-NT50 tool holder; 2-flat key; 3-connecting plate; 4-third bolt; 5-Capto C5 tool holder; 51-core sleeve; 6-screw; 7-cylindrical pin; 8-first bolt; 9-second bolt. Detailed Implementation

[0028] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0029] like Figure 1 , 2 As shown, this utility model provides a combination tool holder using an NT50 to Capto C5 converter, including an NT50 tool holder 1, a connecting plate 3, and a Capto C5 tool holder 5;

[0030] like Figure 2As shown, a first inner hole and a second inner hole are respectively opened on the connecting plate 3. Both the first inner hole and the second inner hole are opened perpendicular to the connecting plate 3. The first inner hole is close to the upper end of the connecting plate 3, and the second inner hole is close to the lower end of the connecting plate 3.

[0031] One end of the NT50 tool holder 1 is used to simultaneously mate with the inner tapered surface and end face of the spindle of a CNC turning and boring machine, such as... Figure 2 As shown, the other end of the NT50 tool holder 1 is provided with a central positioning cylinder and a positioning plane. The central positioning cylinder is inserted into the first inner hole, as shown. Figure 3 As shown, the NT50 tool holder 1 is fixedly connected to the connecting plate 3 by multiple first bolts 8, and the positioning plane is in close contact with the surface of the connecting plate 3; among them, the NT50 tool holder 1 can adopt a 7 / 24 taper design, which can simultaneously cooperate with the spindle and end face of the CNC turning and boring machine's flat turntable, making it a standard tool holder with high positioning accuracy.

[0032] like Figure 4 As shown, the Capto C5 tool holder 5 and the connecting plate 3 are fixedly connected by multiple screws 6. The outer edge of the Capto C5 tool holder 5 is tightly fitted to the surface of the connecting plate 3. The Capto C5 tool holder 5 includes a core sleeve 51, which is inserted into the second inner hole and has an interference fit with the second inner hole. The inner wall of the core sleeve 51 is a triangular cone, and the edges of the triangular cone are evenly distributed in the circumferential direction. The edges of the triangular cone are arc-shaped. A second bolt 9 is threaded in the second inner hole. The second bolt 9 is used to tighten and fix the corresponding tool of the Capto C5 tool holder 5 in the Capto C5 tool holder 5.

[0033] It is understood that the NT50 tool holder 1 of this utility model is a standard tool holder with high positioning accuracy. One end of it can simultaneously mate with the spindle and end face of the CNC turning and boring machine's rotary table, ensuring the positioning accuracy of the NT50 tool holder 1 itself. The other end is precisely positioned by the central positioning cylinder and positioning plane, and is fastened by the first bolt 8, ensuring the fixing accuracy and rigidity transmission between the connecting plate 3 and the NT50 tool holder 1. The Capto C5 tool holder 5 and the connecting plate 3 are fixed by an interference fit and multiple screws 6, ensuring the connection accuracy and connection rigidity between the Capto C5 tool holder 5 and the connecting plate 3. The Capto C5 tool holder 5 uses a dual positioning mechanism of the end face and the conical surface for the tool. Under the tension of the second bolt 9, the Capto C5 tool holder 5 undergoes elastic deformation, allowing the tool and the Capto C5 tool holder 5 to be positioned together. The C5 tool holder features a tight contact mechanism, achieving precise positioning with axial and radial repeatability within 0.005mm. This eliminates the need for tool resetting or adjusting the tool compensation program, enabling cutting operations with a tool change time of less than 2 minutes and a length-to-diameter ratio of 5, thus meeting the requirements of cutting operations.

[0034] In some embodiments, such as Figure 1 , 3As shown, the NT50 tool holder 1 includes multiple flat keys 2, which are fixed to the NT50 tool holder 1 by third bolts 4. The NT50 tool holder 1 is connected to the connecting plate 3 via the flat keys 2. The flat keys 2 further disperse the cutting load, avoid local stress concentration, and further ensure the rigid transmission between the connecting plate 3 and the NT50 tool holder 1.

[0035] In some embodiments, the flat key 2 is clearance-fitted with the keyway of the NT50 tool holder 1, allowing for minor adjustment space to compensate for machining errors or assembly tolerances.

[0036] In some embodiments, the central positioning cylinder is clearance-fitted with the first inner hole.

[0037] Understandably, the NT50 tool holder 1 and the connecting plate 3 achieve clearance fit and multi-point clamping through the central positioning cylinder, the flat key 2 and the first bolt 8, ensuring the rigidity transmission between the NT50 tool holder 1 and the connecting plate 3.

[0038] In some embodiments, a plurality of first bolts 8 are evenly distributed around a central positioning cylinder. For example, Figure 1 As shown, four first bolts 8 can be provided, and the four first bolts 8 are arranged in pairs on the upper and lower sides of the two flat keys 2 respectively.

[0039] It should be noted that, Figure 3 In the diagram, the cross section corresponding to the flat key 2 and the cross section corresponding to the second bolt 9 are two mutually perpendicular cross sections. Figure 4 In the diagram, the cross-section corresponding to the cylindrical pin 7 and the cross-section corresponding to the screw 6 are two mutually perpendicular cross-sections.

[0040] In some embodiments, such as Figure 4 As shown, the second inner hole includes a threaded hole and a mounting hole that are coaxially opened. The diameter of the threaded hole is smaller than the diameter of the mounting hole. The core sleeve 51 is interference-fitted with the mounting hole. One end of the second bolt 9 is threadedly connected to the threaded hole and inserted into the core sleeve 51.

[0041] In some embodiments, the Capto C5 tool holder 5 is transitionally engaged with the connecting plate 3 via multiple cylindrical pins 7. For example... Figure 1 As shown, two cylindrical pins 7 are arranged, and the line connecting the two cylindrical pins 7 is perpendicular to the connection between the first inner hole and the second inner hole, which is used for angular positioning of the Capto C5 tool holder 5 and load distribution.

[0042] Understandably, by interfering with the mounting hole, ensuring the outer edge of the Capto C5 tool holder 5 is tightly fitted to the surface of the connecting plate 3, and using the cylindrical pin 7 for angular positioning, the high precision of the Capto C5 tool holder 5 installation is guaranteed. The connecting plate 3 and the Capto C5 tool holder 5 adopt an interference fit, the cylindrical pin 7 for transition positioning, and the screw 6 for uniform tightening, forming a stable composite connection structure that can effectively suppress cutting vibration.

[0043] In some embodiments, the taper of the Capto C5 tool holder 5 is 1:20 and it is a hollow short taper.

[0044] In some embodiments, a plurality of screws 6 are evenly distributed around the core sleeve 51. Specifically, four screws 6 are provided, arranged in pairs on the upper and lower sides of the two cylindrical pins 7.

[0045] In this utility model, the first bolt 8, the second bolt 9, and the third bolt 4 can all be internal hex bolts, the screw 6 is a countersunk screw 6, and the cylindrical pin 7 is an internally threaded cylindrical pin.

[0046] The NT50 in this utility model references international standard ISO 2583, and the Capto C5 references international standard ISO 26623.

[0047] This utility model solves problems such as long tool changing time, low positioning accuracy, and insufficient rigidity through structural optimization and standardized design, significantly improving the efficiency and quality of deep hole machining. It is suitable for the efficient and precise machining of complex internal cavities of pump heads in oilfield cementing and fracturing equipment.

[0048] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A combination tool holder using an NT50 to Capto C5 converter, characterized in that: Includes NT50 tool holder (1), connecting plate (3), and Capto C5 tool holder (5); The connecting plate (3) has a first inner hole and a second inner hole respectively; One end of the NT50 tool holder (1) is used to simultaneously engage with the inner conical surface and end face of the spindle of the CNC turning and boring machine. The other end of the NT50 tool holder (1) is provided with a central positioning cylinder and a positioning plane. The central positioning cylinder is inserted into the first inner hole. The NT50 tool holder (1) is fixedly connected to the connecting plate (3) by multiple first bolts (8). The positioning plane is in close contact with the surface of the connecting plate (3). The Capto C5 tool holder (5) and the connecting plate (3) are fixedly connected by multiple screws (6). The Capto C5 tool holder (5) includes a core sleeve (51). The core sleeve (51) is inserted into the second inner hole and is interference-fitted with the second inner hole. The inner wall of the core sleeve (51) is triangular cone-shaped. The edges of the triangular cone are evenly distributed in the circumferential direction and are arc-shaped. A second bolt (9) is threaded in the second inner hole. The second bolt (9) is used to tighten and fix the corresponding tool of the Capto C5 tool holder (5) in the Capto C5 tool holder (5).

2. The combination tool holder using NT50 to Capto C5 conversion as described in claim 1, characterized in that: The NT50 tool holder (1) includes multiple flat keys (2), and the NT50 tool holder (1) is connected to the connecting plate (3) via the flat keys (2).

3. The combined tool holder using NT50 to Capto C5 conversion as described in claim 2, characterized in that: The flat key (2) is fitted with the keyway of the NT50 tool holder (1) with clearance.

4. The combination tool holder using NT50 to Capto C5 conversion as described in claim 1, characterized in that: The central positioning cylinder is fitted with a clearance fit to the first inner hole.

5. The combination tool holder using NT50 to Capto C5 conversion as described in claim 1, characterized in that: Multiple first bolts (8) are evenly distributed around the central positioning cylinder.

6. The combination tool holder using NT50 to Capto C5 conversion as described in claim 1, characterized in that: The NT50 tool holder (1) adopts a 7 / 24 taper design.

7. The combination tool holder using NT50 to Capto C5 conversion according to any one of claims 1 to 6, characterized in that: The second inner hole includes a threaded hole and a mounting hole that are coaxially opened. The core sleeve (51) is interference-fitted with the mounting hole. One end of the second bolt (9) is threadedly connected to the threaded hole and inserted into the core sleeve (51).

8. The combination tool holder using NT50 to Capto C5 conversion according to any one of claims 1 to 6, characterized in that: The Capto C5 tool holder (5) is connected to the connecting plate (3) via multiple cylindrical pins (7).

9. The combination tool holder using NT50 to Capto C5 conversion according to any one of claims 1 to 6, characterized in that: The taper of the Capto C5 tool holder (5) is 1:20 and it is a hollow short taper.

10. The combination tool holder using NT50 to Capto C5 conversion according to any one of claims 1 to 6, characterized in that: The screws (6) are evenly distributed around the core sleeve (51).

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