A composite hinge roller cutter

Abstract

The utility model provides a kind of composite hinge hob, including tool body section and the tool shank section of with tool body section interface, tool body section includes reamer area, located between reamer area and tool shank section and rolls the area, reamer area is evenly distributed with several straight line type reamer edges along tool body section axial direction circumferentially, straight line type reamer edge is equipped with straight line type chip flute, straight line type chip flute penetrates and rolls the area, and the rolling needle for being used to the rolling processing of the hole wall wall of the hole to be processed is equipped in the reamer edge back of rolling area, the hydraulic diameter adjusting assembly for adjusting the radial telescoping of rolling needle is further equipped between the rolling area and tool shank section. Through the taper drill of the aluminium alloy knuckle taper hole machining of the present application, roughness requirement higher machining of the hole to be processed can be realized by rolling after reamer area precision reaming is completed by rolling area. Compared with the processing of the hole to be processed by previous multiple processes and multiple equipment, the production rhythm of the present application is shortened, and the efficiency is higher.

Description

Technical Field

[0001] This utility model relates to the field of machining, and specifically designs a composite reamer hob. Background Technology

[0002] In the field of machining, hole machining is a common process requirement, especially for high-precision, high-surface-quality through-hole parts, where the requirements for hole wall roughness are often extremely strict (e.g., Ra < 0.4 μm), and the surface must be free of machining marks. Currently, conventional processes typically employ a multi-step combination scheme of "rough drilling—fine reaming—special finishing (such as rolling, grinding)". For example, rough machining is first completed by drilling, then semi-finishing is performed using a reamer, and finally, high-precision rolling tools or grinding processes are used to achieve the final surface quality requirements.

[0003] In the process of developing the existing technology, the inventors discovered that:

[0004] After precision reaming with a precision reamer, the reamed hole needs to be placed in a rolling and grinding machine. This process requires different processing equipment, which can easily lead to extended production cycle time and low processing efficiency.

[0005] Therefore, this application provides a technical solution that can efficiently process through-hole parts with high surface roughness requirements, thereby solving the problem of low processing efficiency caused by the prior art process of needing to perform rolling and grinding on other equipment after finishing when dealing with parts with high surface roughness requirements. Utility Model Content

[0006] The purpose of this utility model is to provide a technical solution for machining through-hole parts with high surface roughness requirements with higher efficiency, in order to solve the problem that the existing technology requires finishing the parts with high surface roughness requirements and then performing other processes such as rolling and grinding, which results in low processing efficiency.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a composite reamer hob, comprising a cutter body section and a shank section connected to the cutter body section. The cutter body section includes a reamer area and a rolling zone located between the reamer area and the shank section. The reamer area has a plurality of straight reamer blades evenly distributed circumferentially along the axial direction of the cutter body section. Straight chip removal grooves are provided between the straight reamer blades and penetrate the rolling zone. The rolling zone has rollers on the back of the reamer blades for rolling the wall of the hole to be machined.

[0008] Preferably, the relationship between the reamer cutting edge diameter D1 of the reamer area and the diameter of the hole to be processed is: D1 = hole diameter - K; where K is between 0.04mm and 0.08mm.

[0009] Preferably, the relationship between the diameter D2 of the rolling zone and the reamer cutting diameter D1 of the reamer zone is D2=D1-P; where P is between 0.5mm and 1mm.

[0010] Preferably, the relationship between the diameter D3 of the position where the roller needle is installed in the rolling zone and the diameter of the hole to be processed is: D3 = hole diameter.

[0011] Preferably, the relationship between the blade length L1 of the reamer in the reamer area and the blade diameter D1 of the reamer in the reamer area is: L1 = 1.5 × D1.

[0012] Preferably, the distance L2 between the end face of the reamer area away from the shank section and the needle roller mounting position in the rolling zone is: L2 = L1 + 10.

[0013] Preferably, the relationship between the total length L3 of the reamer zone and the rolling zone and the hole depth of the hole to be processed is: L3 = hole depth + 15.

[0014] Preferably, a hydraulic diameter adjustment assembly for adjusting the radial extension and retraction of the needle roller is also provided between the rolling zone and the tool holder section.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows: Only one composite reaming hob of this application is needed; after precision reaming in the reaming zone, the hole can be rolled using a needle roller in the rolling zone to achieve a high surface roughness. Compared with the previous multi-process, multi-equipment machining of the hole, this application has a shorter production cycle and higher efficiency. Attached Figure Description

[0016] Figure 1 A schematic diagram of the composite reamer hob provided by this utility model;

[0017] Figure 2 Another schematic diagram of the composite reamer hob provided by this utility model;

[0018] Legend: 100, compound reamer hob;

[0019] 1. Tool body section; 11. Reamer area; 111. Straight reamer edge; 112. Straight chip groove; 12. Rollering area; 121. Needle roller;

[0020] 2. Handle section;

[0021] 3. Hydraulic diameter adjustment assembly; Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0023] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0024] Please see Figures 1 to 2 The present invention provides a composite reamer hob 100, comprising a cutter body section 1 and a shank section 2 connected to the cutter body section 1. The cutter body section 1 includes a reamer area 11 and a rolling zone 12 located between the reamer area 11 and the shank section 2. The reamer area 11 has a plurality of straight reamer blades 111 evenly distributed circumferentially along the axial direction of the cutter body section 1. A straight chip removal groove 112 is provided between the straight reamer blades 111 and passes through the rolling zone 12. The rolling zone 12 has a roller needle 121 on the back of the reamer blade for rolling the wall of the hole to be processed.

[0025] Specifically, the composite reamer 100 provided in this application transforms the previous process of drilling with a drilling tool, reaming with a precision reamer, and rolling with a rolling mill into a process that only requires drilling with a drilling tool and reaming with a reamer, and rolling. This shortens the production cycle time caused by the previous two processes of reaming with a precision reamer and rolling with a rolling mill, thereby improving processing efficiency.

[0026] This application uses the reamer zone 11 of the cutter body section 1 to perform fine reaming of the hole to be machined, and the roller 121 of the rolling zone 12 to achieve the rolling finish of the hole wall of the hole to be machined.

[0027] In a preferred embodiment provided in this application, a weld reamer is provided on one side of a plurality of straight reamer blades 111 in the reamer area 11, i.e., in the straight chip removal groove 112, to achieve fine reaming. The straight chip removal groove 112 is mainly provided for better chip removal, so as to ensure the hole wall quality of the hole to be machined after fine reaming.

[0028] Furthermore, the relationship between the reamer cutting edge diameter D1 of the reamer area 11 and the diameter of the hole to be processed is: D1 = hole diameter - K; where K is between 0.04mm and 0.08mm.

[0029] Specifically, the reamer cutting diameter D1 is determined based on the customer's working conditions. In a preferred embodiment provided in this application, D1 is preferably equal to the hole diameter minus K. It can be understood that K is the machining allowance for the hole wall after precision reaming, to facilitate further processing via rolling.

[0030] Furthermore, the relationship between the cutting edge length L1 of the reamer edge in the reamer region 11 and the cutting edge diameter D1 of the reamer edge in the reamer region 11 is as follows:

[0031] L1 = 1.5 X D1.

[0032] Specifically, the relationship between the cutting length L1 and the cutting diameter D1 is mainly to ensure the stability of the reaming hob machining, so that the reamer in the reamer zone 11 can perform better machining.

[0033] In a preferred embodiment provided in this application, the rolling zone 12 is used to roll the wall of the hole to be processed by providing a rolling needle 121 on the back of the reamer blade. It should be noted that rolling is a pressure finishing process that utilizes the cold plasticity of metal at room temperature. A certain pressure is applied to the surface of the workpiece using a rolling tool, causing the surface metal of the workpiece to plastically flow and fill the original residual low-recessed valleys, thereby reducing the surface roughness of the workpiece. In this application, the rolling needle 121 is pressed against the hole to be processed, pressing the uneven areas of the workpiece surface to make it smooth and achieve a mirror-like effect.

[0034] Furthermore, the relationship between the diameter D2 of the rolling zone 12 and the reamer cutting diameter D1 of the reamer zone 11 is: D2 = D1 - P; where P is between 0.5 mm and 1 mm.

[0035] Specifically, the diameter of the rolling zone 12 is set lower than the diameter of the reamer zone 11, and its value is set between 0.5mm and 1mm. This can be understood as the clearance diameter, which is used to avoid possible interference during the processing.

[0036] Furthermore, the relationship between the diameter D3 of the position where the roller needle 121 is installed in the rolling zone 12 and the diameter of the hole to be processed is: D3 = hole diameter.

[0037] Specifically, the diameter D3 of the position where the roller needle 121 is installed in the rolling zone 12 is equal to the diameter of the hole to be processed, so as to achieve the processing of the hole with high surface roughness requirements.

[0038] Furthermore, the distance L2 between the end face of the reamer area 11 away from the shank section 2 and the installation position of the needle roller 121 in the rolling area 12 is: L2 = L1 + 10.

[0039] Specifically, the distance between the needle roller 121 and the end face of the reamer area 11 away from the tool holder section 2 is set to determine the distance at which the needle roller 121 will be rolled after fine reaming.

[0040] Furthermore, the relationship between the total length L3 of the reamer area 11 and the rolling area 12 and the hole depth to be processed is: L3 = hole depth + 15.

[0041] Specifically, the distance relationship between the reamer zone 11 and the rolling zone 12 relative to the hole depth of the hole to be processed is set in order to ensure that the hole wall of the hole to be processed can be rolled, thereby ensuring the requirements of hole wall roughness.

[0042] Furthermore, to ensure that the diameter D3 of the position where the needle roller 121 is installed in the rolling zone 12 is equal to the diameter of the hole to be machined, this application also provides a hydraulic diameter adjustment assembly 3 between the rolling zone 12 and the tool holder section 2 for adjusting the radial extension and retraction of the needle roller 121.

[0043] Specifically, the hydraulic diameter adjustment component 3 includes: a piston built into the rolling zone 12 and connected to the needle roller 121 via a linkage mechanism; a hydraulic component connected to the piston; and a drive rod located between the hydraulic component and the tool holder section 2. The hydraulic component and the drive rod are connected and driven by a thread.

[0044] It can be understood that by rotating the drive rod, the hydraulic components are driven to move the linkage mechanism. The movement of the linkage mechanism is converted into the radial extension and retraction of the needle roller 121, thereby making the diameter D3 equal to the diameter of the hole to be processed.

[0045] It should be noted that in the adjustment of the radial direction of the needle roller 121 by the hydraulic diameter adjustment component 3, the linkage mechanism includes a first connecting rod connected to the piston, and a second connecting rod whose one end is connected to the first connecting rod at an inclined angle and whose other end is connected to the needle roller 121. When the piston is driven to move axially, the first connecting rod and the second connecting rod connected to the piston move, thereby realizing the extension and retraction of the needle roller 121 in the radial direction.

[0046] It should also be noted that those skilled in the art are familiar with the hydraulic diameter adjustment assembly 3 and its driving structure other than that used in this application when adjusting the needle roller 121. Therefore, this application will not elaborate further.

[0047] The composite reaming hob 100 of this application enables the machining of holes with high surface roughness requirements by performing precision reaming in the reaming zone 11 followed by rolling with the rolling needle 121 in the rolling zone 12 after fine reaming in the reaming zone 11. Compared with the previous multi-process and multi-equipment machining of holes, the production cycle of this application is shortened and the efficiency is higher.

[0048] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A composite reamer hob, characterized in that, It includes a cutter body section and a shank section connected to the cutter body section. The cutter body section includes a reamer area and a rolling zone located between the reamer area and the shank section. The reamer area has several straight reamer blades evenly distributed circumferentially along the axis of the cutter body section. Straight chip removal grooves are provided between the straight reamer blades. The straight chip removal grooves penetrate the rolling zone. The rolling zone has rollers on the back of the reamer blades for rolling the wall of the hole to be machined.

2. The composite reamer hob according to claim 1, characterized in that, The relationship between the reamer cutting edge diameter D1 in the reamer zone and the diameter of the hole to be machined is as follows: D1 = Aperture - K; The value of K is between 0.04 mm and 0.08 mm.

3. The composite reamer hob according to claim 2, characterized in that, The relationship between the diameter D2 of the rolling zone and the reamer cutting diameter D1 of the reamer zone is as follows: D2 = D1 - P; The value of P is between 0.5mm and 1mm.

4. The composite reamer hob according to claim 1 or 3, characterized in that, The relationship between the diameter D3 of the position where the needle rollers are installed in the rolling zone and the diameter of the hole to be processed is as follows: D3 = Aperture.

5. The composite reamer hob according to claim 1, characterized in that, The relationship between the cutting edge length L1 and the cutting edge diameter D1 of the reamer in the reamer area is as follows: L1 = 1.5X D1.

6. The composite reamer hob according to claim 4, characterized in that, The relationship between the distance L2 between the end face of the reamer area away from the tool holder section and the position of the needle roller in the rolling zone is as follows: L2 = L1 + 10.

7. The composite reamer hob according to claim 1, characterized in that, The relationship between the total length L3 of the reamer zone and the rolling zone and the depth of the hole to be machined is as follows: L3 = Hole depth + 15.

8. The composite reamer hob according to claim 1, characterized in that, A hydraulic diameter adjustment assembly for adjusting the radial extension and retraction of the needle roller is also provided between the rolling zone and the tool holder section.

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