Cutter for solving pressure shell sealing

Abstract

The utility model relates to the technical field of machining, in particular to a cutter for solving the sealing problem of a pressing shell. The tool comprises a tool handle, a tool apron and a tool bit, the two groups of tool bits are fixed on the tool apron; the tool apron is used for being connected with the tool handle and is of a central symmetry structure. After the cutter holder is connected with the cutter handle, the two groups of cutter heads arranged on the cutter holder are symmetrically arranged relative to the axis of the cutter handle; the cutter handle is connected with a spindle of a machining center. And the machining center drives the main shaft to rotate so as to drive the cutter to rotate at a high speed to machine the to-be-machined pressing shell. The tool bit comprises a flat machining part and a convex machining part; the convex machining parts are arranged on the side, close to the symmetry axis, of the flat machining part, the flat machining part is used for machining a pipe orifice face, and the convex machining parts are used for machining sealing grooves; the pipe orifice surface and the sealing groove are formed by one-step processing; the machining efficiency is improved, the machining precision is guaranteed, and the working procedure capability is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of machining, in particular to a tool for solving the problem of compression shell sealing. Background Art

[0002] As an important part of automobile engine, the compressor casing has high sealing requirements, such as Figure 1 and 2 As shown, the height difference between the compression shell tube mouth surface and the sealing groove must be controlled within 2.75+ / -0.05, otherwise leakage will occur and affect engine performance.

[0003] The traditional processing method is divided into two steps; Figure 3 As shown in the figure, a flying cutter is used to process the tube mouth surface at the shell tube mouth, and then a sleeve groove cutter is used to process the sealing groove; however, since the two surfaces are processed by different tools, the height difference between the two surfaces is unstable, which is prone to out-of-tolerance problems;

[0004] After systematic analysis, it was found that the reason was that aluminum chips occasionally stuck to the cone surface of the tool handle during CNC processing, causing the tool length to change suddenly and the height of the sealing groove to exceed the tolerance; the processed products needed to be inspected 100 times before they could be shipped, wasting a lot of manpower and material resources;

[0005] The existing methods to solve this problem include: 1. Add a brush at the entrance of the tool magazine; 2. Manually clean the tool sleeve regularly; 3. Add a tool holder flushing device to the spindle; these methods have little effect, and the problem of out-of-tolerance occurs occasionally and still exists; 4. For the two knives that affect the height of the sealing groove, each machine tool needs to add a broken tool detection, which requires a lot of investment. The broken tool detection is set to sense 0.05MM. If a smaller value is set, frequent alarms will affect production; and the addition of a broken tool detection to two knives increases the cycle time by 30 seconds, affecting processing efficiency, and cannot 100% eliminate the occurrence of out-of-tolerance. Therefore, how to solve the out-of-tolerance phenomenon in the processing process at a low cost has become a technical problem that needs to be solved urgently. Utility Model Content

[0006] The utility model aims to solve the problems existing in the background technology and proposes a tool for solving the problem of shell sealing. By improving the existing tools, two tools are combined into one to form a composite tool, which is processed and formed in one time during the processing, thereby improving the processing efficiency and ensuring that the processing accuracy and process capability are greatly improved.

[0007] The technical solution of the utility model is a tool for solving the problem of compression shell sealing, comprising a tool handle, a tool seat and a tool head;

[0008] Two groups of cutter heads are provided and both are fixed on the cutter holder;

[0009] The knife seat is used to connect with the knife handle, and the knife seat is a central symmetrical structure; after the knife seat is connected with the knife handle, the two sets of knife heads arranged on the knife seat are symmetrically arranged with the central axis of the knife handle to the symmetry axis;

[0010] The tool holder is connected to the spindle of the machining center;

[0011] The machining center drives the spindle to rotate, which in turn drives the tool to rotate at high speed to process the compression shell to be processed.

[0012] Preferably, the tool head comprises a flat processing portion and a convex processing portion; there is one and only one group of convex processing portions, and they are arranged on one side of the flat processing portion close to the axis of symmetry.

[0013] Preferably, the flat processing portion is used for processing the pipe mouth surface.

[0014] Preferably, the convex processing portion is used for processing the sealing groove.

[0015] Preferably, the pipe mouth surface and the sealing groove are formed at one time.

[0016] Preferably, the model of the knife handle is BT40.

[0017] Compared with the prior art, the utility model has the following beneficial technical effects:

[0018] 1. In the process of machining, as the main shaft of the machining center rotates and feeds, the convex machining part first contacts the compression shell, and then the flat machining part contacts the compression shell, and the pipe mouth and the sealing groove are processed during the high-speed rotation; Figure 3 The flying knife shown and Figure 4 Compared with the two-processing method of the slotting cutter shown in the figure, the pipe mouth surface and the sealing groove of the utility model are processed and formed at one time; because the cutter is designed as a composite cutter, the sealing surface and the sealing groove are formed by one cutter, and the cutter is used to ensure that even if aluminum chips are occasionally stuck to the handle, the relative height difference remains unchanged because it is a single cutter, thus protecting the sealing performance without increasing investment, and shortening the processing cycle time by 30 seconds, thereby improving processing efficiency, ensuring processing accuracy, and greatly improving process capability;

[0019] 2. The utility model is designed as a double-edged structure. Compared with a tool with a single-edged structure, it can also reduce the movement of the spindle of the machining center during the machining process, which is beneficial to improving the machining efficiency.

[0020] 3. The model of the tool handle in the utility model is BT40, which has good compatibility. After adopting the tool in this solution, when machining some workpieces similar to the compression shell, the height difference requirement is relatively high, and the lathe accuracy is not high, the environment is not good (such as sticky aluminum chips), etc., the tool in this embodiment can solve the out-of-tolerance problem well without increasing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is one of the structural schematic diagrams of the medium-compressor casing of the utility model;

[0022] Figure 2 This is the second structural schematic diagram of the medium-pressure air casing of the utility model;

[0023] Figure 3 It is a structural schematic diagram of the original pipe mouth surface flying knife in the prior art;

[0024] Figure 4 It is a structural schematic diagram of the original groove cutter in the prior art;

[0025] Figure 5 This is a schematic diagram of the improved tool structure in the utility model;

[0026] Figure 6 To improve the first 32pcs data and process capability chart;

[0027] Figure 7 This is the improved 32pcs data and process capability chart.

[0028] Figure numerals: 1, knife handle; 2, knife seat; 3, knife head; 31, flat processing part; 32, convex processing part; 4, pressing shell; 41, pipe mouth; 5, flying face knife; 6, grooving knife. DETAILED DESCRIPTION

[0029] Example 1

[0030] The utility model proposes a tool for solving the problem of shell sealing, such as Figure 5 As shown, it includes a knife handle 1, a knife seat 2 and a knife head 3;

[0031] Two groups of cutter heads 3 are arranged and both are fixed on the cutter seat 2; the cutter head 3 includes a flat processing part 31 and a convex processing part 32; there is only one group of convex processing part 32, and it is arranged on one side of the flat processing part 31 close to the symmetry axis; wherein, the flat processing part 31 is used for processing the pipe mouth surface; and the convex processing part 32 is used for processing the sealing groove.

[0032] The knife seat 2 is used to connect with the knife handle 1, and the knife seat 2 is a central symmetrical structure; after the knife seat 2 is connected with the knife handle 1, the two sets of knife heads 3 arranged on the knife seat 2 are symmetrically arranged with the central axis of the knife handle 1 to the symmetry axis;

[0033] The tool holder 1 is connected to the spindle of the machining center;

[0034] The machining center drives the main shaft to rotate, thereby driving the tool to rotate at high speed to process the compression shell 4 to be processed.

[0035] In this embodiment, during the machining process, as the main shaft of the machining center rotates and feeds, the convex machining portion 32 first contacts the compression shell 4, and then the flat machining portion 31 contacts the compression shell 4, and the pipe mouth and the sealing groove are machined during the high-speed rotation process; Figure 3 The flying knife shown and Figure 4 Compared with the two-processing method of the grooving cutter shown in the figure, the pipe mouth surface and the sealing groove of the utility model are processed and formed in one time; because the tool is designed as a composite tool, the sealing surface and the sealing groove are formed in one knife, which is guaranteed by the knife. Even if aluminum chips occasionally stick to the handle, because it is a knife, the relative height difference remains unchanged, thus protecting the sealing performance without increasing investment, and shortening the processing cycle time by 30 seconds, thereby improving processing efficiency, ensuring processing accuracy, and greatly improving process capability; in addition, the utility model is designed as a double-edged structure, which can also reduce the movement of the spindle of the machining center during machining compared to a single-edged tool, which is beneficial to improving processing efficiency.

[0036] In this embodiment, the model of the tool handle 1 is BT40, which has good compatibility. After adopting the tool in this solution, when machining some workpieces similar to the compression shell, the height difference requirement is relatively high, the lathe accuracy is not high, the environment is not good (such as sticky aluminum chips), etc., the tool in this embodiment can solve the out-of-tolerance problem well without increasing the cost.

[0037] like Figure 6 The data of 32pcs before improvement is shown in the figure; Figure 7 The figure shows the improved 32pcs data;

[0038] From the analysis of the experimental results, the improved tools were used; the cpk (process capability index) increased from 0.67 to 2.06, the process capability was greatly improved, and the effect was remarkable; and the improved tools have been in operation for one year, the effect is good, the sealing groove height has never exceeded the tolerance, and the production capacity has been improved; the actual life of the new tools is about 25,000 pieces, which completely solves this problem, and it has also been expanded for similar products with remarkable results.

[0039] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A tool for solving the problem of shell sealing, characterized in that: It comprises a knife handle (1), a knife seat (2) and a knife head (3); Two groups of cutter heads (3) are provided, and both are fixed on the cutter seat (2); The knife seat (2) is used to connect with the knife handle (1), and the knife seat (2) is a centrally symmetrical structure; after the knife seat (2) is connected with the knife handle (1), two sets of knife heads (3) arranged on the knife seat (2) are symmetrically arranged with the central axis of the knife handle (1) relative to the symmetry axis; The tool handle (1) is connected to the spindle of the machining center; The machining center drives the main shaft to rotate, thereby driving the tool to rotate at high speed to process the compression shell (4) to be processed.

2. A tool for solving the problem of compression shell sealing according to claim 1, characterized in that: The cutter head (3) comprises a flat processing portion (31) and a convex processing portion (32); there is only one group of convex processing portions (32) which are arranged on one side of the flat processing portion (31) close to the axis of symmetry.

3. A tool for solving the problem of compression shell sealing according to claim 2, characterized in that: The flat processing part (31) is used for processing the pipe mouth surface.

4. A tool for solving the problem of compression shell sealing according to claim 2, characterized in that: The convex processing part (32) is used for processing the sealing groove.

5. A tool for solving the problem of compression shell sealing according to claim 3 or 4, characterized in that: The pipe mouth surface and the sealing groove are formed in one process.

6. A tool for solving the problem of compression shell sealing according to claim 1, characterized in that: The model of the tool handle (1) is BT40.

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