Airtight positioning device for finish turning of machine tool

Abstract

The utility model relates to an airtight positioning device to solve the technical problem that whether a workpiece to be machined is installed on a machine tool correctly or not is difficult to judge in the prior art. The utility model provides an airtight positioning device for finish turning of a machine tool, which comprises a positioning seat which is positioned between a machine tool spindle chuck and a workpiece to be machined and is connected with the machine tool spindle chuck, one end of the positioning seat far away from the machine tool spindle chuck is provided with three uniformly distributed support bulges, and the three support bulges are respectively provided with a sealing support; an air supply hole communicated with a machine tool spindle hole is formed in one side, close to the machine tool spindle chuck, of the positioning seat; three air channels corresponding to the three supporting protrusions in position are formed in the positioning base, one end of each air channel communicates with the air supply hole, the other end of each air channel communicates with the outside of the positioning base, and a first sealing bolt is arranged at the other end of each air channel. A through hole communicated with the air channel is formed in the middle of the sealing support, and air flow flows in from the air supply hole and then reaches the supporting end face of the to-be-machined workpiece through the air channel and the through hole.

Description

Technical Field

[0001] The utility model relates to an airtight positioning device, in particular to an airtight positioning device for fine turning of a machine tool. Background Art

[0002] At present, in the process of processing disc gears, a two-step processing method is usually used to perform fine turning on the disc gears: the first step is to fix the outer circle of the blank of the workpiece to be processed by the three-jaw chuck of the machine tool, and use the machine tool tool to fine turn the end face and the inner hole of one end; the second step is to turn the workpiece to be processed, use the expansion sleeve to tighten the inner circle of the workpiece to be processed, and fix the workpiece by supporting the processed end face of the workpiece, and then use the machine tool to fine-process the end face and outer circle of the other end.

[0003] However, this processing method makes it difficult to determine whether the workpiece to be processed is properly installed on the machine tool. If the workpiece to be processed is not properly installed, it is easy to cause large errors in the machine tool's fine turning processing. Utility Model Content

[0004] The utility model aims to solve the technical problems in the prior art that it is difficult to judge whether the workpiece to be processed is installed correctly on the machine tool during the processing of disc gears, and the machine tool fine turning processing is prone to large errors, and to provide an airtight positioning device for machine tool fine turning processing.

[0005] In order to solve the above technical problems, the technical solutions provided by the utility model are as follows:

[0006] An airtight positioning device for machine tool precision turning includes a positioning seat located between a machine tool spindle chuck and a workpiece to be processed and connected to the machine tool spindle chuck, and the special features thereof are:

[0007] The positioning seat is provided with three evenly distributed support protrusions on one side away from the machine tool spindle chuck, and the three support protrusions are all provided with sealing supports, and one end of the sealing support away from the support protrusion contacts with the support end face of the workpiece to be processed;

[0008] An air supply hole connected to the main shaft hole of the machine tool is provided at one end of the positioning seat close to the main shaft chuck of the machine tool; three air passages corresponding to the positions of the three supporting protrusions are provided inside the positioning seat, one end of the air passage is connected to the air supply hole, and the other end of the air passage is connected to the outside of the positioning seat, and a first sealing bolt is provided at the other end of the air passage for sealing the other end of the air passage;

[0009] A through hole connected to the air channel is provided in the middle of the sealing support, and air flows in from the air supply hole and reaches the support end face of the workpiece to be processed through the air channel and the through hole.

[0010] Furthermore, the positioning seat is provided with an annular boss adapted to the main shaft hole of the machine tool at the opening of the air supply hole, and the annular boss is placed in the main shaft hole of the machine tool;

[0011] An annular groove is provided on the outer side wall of the annular boss around the central axis of the annular boss, and an annular sealing ring is arranged in the annular groove.

[0012] Furthermore, the support protrusion is provided with a plurality of threaded holes which are sequentially distributed along the central axis of the airway and are connected to the airway;

[0013] The sealing support is installed in any threaded hole, and the remaining threaded holes are provided with second sealing bolts for sealing the threaded holes.

[0014] Furthermore, the sealing support includes a cylindrical section and a stud section, the diameter of the cylindrical section is larger than the diameter of the stud section; the stud section is threadedly connected to the supporting protrusion;

[0015] A first annular groove is provided on an end surface of the cylindrical section close to one end of the stud section around the central axis of the cylindrical section, and a first annular sealing ring is provided in the first annular groove.

[0016] Furthermore, two supporting planes are symmetrically arranged on the outer side wall of the cylindrical section of the sealing support, and the two supporting planes constitute a wrench clamping area.

[0017] Furthermore, the positioning seat is connected to the machine tool spindle chuck via a plurality of hexagon socket screws.

[0018] Furthermore, a second annular groove is provided on the end surface of the screw head of the second sealing bolt close to one end of the screw rod, and a second annular sealing ring is provided in the second annular groove.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] 1. The utility model provides an airtight positioning device for machine tool fine turning, in which gas is injected into the air supply hole through the main spindle hole of the machine tool, and the gas reaches the end face of the workpiece through the air passage of the positioning seat and the through hole on the sealing support. By judging whether there is air leakage between the sealing support and the end face of the workpiece, it is judged whether the workpiece is installed correctly on the machine tool, so as to ensure the accuracy of the machine tool when performing fine turning on the workpiece.

[0021] 2. The utility model provides an airtight positioning device for machine tool precision turning. Since each support protrusion of the positioning seat is provided with a plurality of threaded holes, during specific use, the installation position of the sealing support can be determined according to the diameter of the support end face distribution circle of the workpiece to be processed, so as to meet the support positioning of workpieces of different structural sizes. For different replacement parts, it is only necessary to adjust the installation position of the sealing support to achieve rapid positioning. There is no need to invest in supports of different sizes and specifications, which saves design and manufacturing costs and improves the efficiency of tooling inventory management.

[0022] 3. The airtight positioning device for machine tool precision machining provided by the utility model has a simple structure, a short manufacturing cycle and low cost. The positioning seat is a fixed device and does not need to be replaced. The sealing support is similar to a cylindrical structure. The sealing support has a through hole for easy processing. For some parts that need to be supported shorter, the cylindrical section of the sealing support can be shortened, and the versatility is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front view of the embodiment of the utility model after removing the sealing support, the second sealing bolt and the hexagon socket screw;

[0024] Figure 2 It is a three-dimensional structural schematic diagram of an embodiment of the utility model;

[0025] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure along the section line AA;

[0026] Figure 4 This is a schematic diagram of the internal structure of the sealing support in the embodiment of the utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the second sealing bolt in the embodiment of the utility model;

[0028] Explanation of the accompanying drawings: 1-positioning seat, 11-supporting protrusion, 12-air supply hole, 13-air duct, 14-annular boss, 15-annular groove, 16-threaded hole, 17-first sealing bolt, 2-sealing support, 21-through hole, 22-cylindrical section, 221-first annular groove, 222-first annular sealing ring, 223-supporting plane, 23-stud section, 3-second sealing bolt, 31-second annular groove, 32-second annular sealing ring, 4-hexagon socket screw. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings to clearly and completely describe the technical solution of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] like Figure 1 and Figure 2As shown, an airtight positioning device for machine tool precision turning processing includes a positioning seat 1 located between the machine tool spindle chuck and the workpiece to be processed and connected to the machine tool spindle chuck. The cross section of the positioning seat 1 is an isosceles triangle. The end of the positioning seat 1 away from the machine tool spindle chuck is provided with three evenly distributed support protrusions 11. The three support protrusions 11 are all provided with sealing supports 2. The end of the sealing support 2 away from the support protrusions 11 contacts the support end surface of the workpiece to be processed.

[0031] like Figure 3 As shown, an air supply hole 12 communicating with the main shaft hole of the machine tool is provided at one end of the positioning seat 1 close to the main shaft chuck of the machine tool; three air passages 13 corresponding to the positions of the three supporting protrusions 11 are provided inside the positioning seat 1, one end of the air passage 13 is communicated with the air supply hole 12, and the other end of the air passage 13 is connected with the outside of the positioning seat 1, and a first sealing bolt 17 is provided at the other end of the air passage 13; the first sealing bolt 17 is used to seal the other end of the air passage 13; as shown in FIG. Figure 2 and Figure 4 As shown, a through hole 21 communicating with the air channel 13 is provided in the middle of the sealing support 2. The air flows in from the air supply hole 12 and reaches the supporting end surface of the workpiece to be processed through the air channel 13 and the through hole 21.

[0032] During use, gas is provided to the air supply hole 12 through the main spindle hole of the machine tool, the gas in the air supply hole 12 reaches the through hole 21 of the sealing support 2 through the air duct 13, and the gas is blown from the through hole 21 of the sealing support 2 to the supporting end face of the workpiece to be processed; since the sealing support 2 is in contact with the supporting end face of the workpiece to be processed, it can be judged whether the workpiece to be processed is installed correctly by judging whether there is leakage at the contact part between the sealing support 2 and the supporting end face of the workpiece to be processed.

[0033] In order to fix the positioning seat 1 and the machine tool spindle chuck, Figure 2 As shown, the positioning seat 1 is connected to the machine tool spindle chuck through six hexagon socket screws 4. At the same time, in order to ensure the connection reliability and sealing between the machine tool spindle hole and the air supply hole 12, as shown in FIG. Figure 3 As shown, an annular boss 14 for matching with the machine tool spindle hole is provided at the opening of the air supply hole 12 of the positioning seat 1, and the annular boss 14 is placed in the machine tool spindle hole; an annular groove 15 is provided on the outer wall of the annular boss 14 around the central axis of the annular boss 14, and an annular sealing ring is provided in the annular groove 15. The position between the positioning seat 1 and the machine tool spindle chuck is positioned by extending the annular boss 14 into the machine tool spindle hole, and at the same time, the machine tool spindle hole and the air supply hole 12 are sealed by the annular sealing ring.

[0034] In order to enable the seal support 2 to be replaced quickly, Figure 4As shown, the sealing support 2 includes a cylindrical section 22 and a stud section 23, and the sealing support 2 can be quickly replaced by threading the stud section 23 with the support protrusion 11. The diameter of the cylindrical section 22 is larger than the diameter of the stud section 23; the stud section 23 is threadedly connected with the support protrusion 11; a first annular groove 221 is provided on the end surface of the cylindrical section 22 near one end of the stud section 23 around the central axis of the cylindrical section 22, and a first annular sealing ring 222 is provided in the first annular groove 221; by providing the first annular sealing ring 222, it is ensured that there is no air leakage between the sealing support 2 and the support protrusion 11.

[0035] In order to facilitate the disassembly and replacement of the sealing support 2, as Figure 2 and Figure 4 As shown, two symmetrically arranged support planes 223 are provided on the outer side wall of the cylindrical section 22 of the sealing support 2. The two support planes 223 form a wrench clamping area. The sealing support 2 can be removed or replaced by using a wrench adapted to the wrench clamping area.

[0036] like Figure 1 and Figure 3 As shown, the support protrusion 11 is provided with four threaded holes 16 which are sequentially distributed along the central axis of the airway 13 and communicated with the airway 13; Figure 2 As shown, the sealing support 2 is installed in any threaded hole 16 , and the other threaded holes 16 are provided with second sealing bolts 3 for sealing the threaded holes 16 .

[0037] The end of the stud section 23 of the sealing support 2 away from the cylindrical section 22 and the end of the second sealing bolt 3 will not block the flow of gas in the air passage 13 .

[0038] In specific use, the installation position of the sealing support can be determined according to the distribution circle diameter of the support end face of the workpiece to be processed, so as to meet the support positioning of the workpiece to be processed with different structural sizes. That is, by changing the position of the sealing support 2 in the four threaded holes 16 distributed in sequence along the central axis of the airway 13, it can adapt to different support end faces of the workpiece to be processed, and at the same time, the remaining threaded holes 16 are blocked with the second sealing bolts 3.

[0039] To ensure that there is no air leakage between the second sealing bolt 3 and the threaded hole 16 of the supporting protrusion 11, Figure 5 As shown, a second annular groove 31 is formed on the end surface of the screw head of the second sealing bolt 3 close to one end of the screw rod, and a second annular sealing ring 32 is arranged in the second annular groove 31 .

[0040] In this embodiment, the annular sealing ring, the first annular sealing ring 222 and the second annular sealing ring 32 are all O-rings in accordance with the GB / T3452.1-2005 standard.

[0041] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or replacements within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An airtight positioning device for machine tool precision turning, comprising a positioning seat (1) located between a machine tool spindle chuck and a workpiece to be processed and connected to the machine tool spindle chuck, characterized in that: The positioning seat (1) is provided with three evenly distributed support protrusions (11) on a side away from the machine tool spindle chuck, and the three support protrusions (11) are all provided with sealing supports (2), and one end of the sealing support (2) away from the support protrusion (11) contacts the support end surface of the workpiece to be processed; An air supply hole (12) communicating with the main shaft hole of the machine tool is provided at one end of the positioning seat (1) close to the main shaft chuck of the machine tool; three air passages (13) corresponding to the positions of the three supporting protrusions (11) are provided inside the positioning seat (1); one end of the air passage (13) is communicated with the air supply hole (12), and the other end of the air passage (13) is connected with the outside of the positioning seat (1); a first sealing bolt (17) is provided at the other end of the air passage (13) for sealing the other end of the air passage (13); A through hole (21) communicating with the air channel (13) is provided in the middle of the sealing support (2). After air flows in from the air supply hole (12), it passes through the air channel (13) and the through hole (21) to reach the support end face of the workpiece to be processed.

2. The airtight positioning device for machine tool precision turning according to claim 1, characterized in that: The positioning seat (1) is provided with an annular boss (14) for matching with the main spindle hole of the machine tool at the opening of the air supply hole (12), and the annular boss (14) is placed in the main spindle hole of the machine tool; An annular groove (15) is provided on the outer side wall of the annular boss (14) around the central axis of the annular boss (14), and an annular sealing ring is provided in the annular groove (15).

3. The airtight positioning device for machine tool precision turning according to claim 1, characterized in that: The supporting protrusion (11) is provided with a plurality of threaded holes (16) which are sequentially distributed along the central axis of the airway (13) and are in communication with the airway (13); The sealing support (2) is installed in any one of the threaded holes (16), and the remaining threaded holes (16) are provided with second sealing bolts (3) for sealing the threaded holes (16).

4. The airtight positioning device for machine tool fine turning according to claim 1 or 3, characterized in that: The sealing support (2) comprises a cylindrical section (22) and a stud section (23); the diameter of the cylindrical section (22) is larger than the diameter of the stud section (23); the stud section (23) is threadedly connected to the support protrusion (11); A first annular groove (221) is provided on an end surface of the cylindrical section (22) close to one end of the stud section (23) around the central axis of the cylindrical section (22), and a first annular sealing ring (222) is provided in the first annular groove (221).

5. The airtight positioning device for machine tool finishing machining according to claim 4, characterized in that: Two support planes (223) are symmetrically arranged on the outer side wall of the cylindrical section (22) of the sealing support (2), and the two support planes (223) form a wrench clamping area.

6. The airtight positioning device for machine tool precision turning according to claim 2, characterized in that: The positioning seat (1) is connected to the machine tool spindle chuck via a plurality of hexagon socket screws (4).

7. The airtight positioning device for machine tool finishing machining according to claim 3, characterized in that: A second annular groove (31) is provided on the end surface of the screw head of the second sealing bolt (3) close to one end of the screw rod, and a second annular sealing ring (32) is provided in the second annular groove (31).

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