Airtight blowing structure and method for exchange workbench

Abstract

The invention discloses an airtight blowing structure and method for an exchange workbench, and belongs to the technical field of machinery. The workbench is provided with 18 oil cylinders, the oil cylinders are connected with the machine tool workbench respectively, two semicircular cylindrical blocks are arranged on the two sides of each oil cylinder respectively, the semicircular cylindrical blocks are connected with the machine tool workbench, a part of the semicircular cylindrical blocks are provided with airtight blowing structures, and the airtight blowing structures are formed by transverse blowing holes 25 with the diameter phi being 8.2 mm, transverse blowing holes 25 with the diameter phi being 8.2 mm, transverse blowing holes 25 with the diameter phi being 8.2 mm and transverse blowing holes 25 with the diameter phi being 8.2 mm. A vertical air blowing hole 27 with the diameter phi being 6 mm and an airtight air blowing hole 24 with the diameter phi being 1.2 mm form an air blowing structure on each semicircular cylindrical block, and the air blowing structures are used for blowing away dust, scrap iron and the like on the contact surface between the machine tool workbench and the exchange workbench, so that the contact surface is kept clean and tidy; and dust or scrap iron is prevented from falling on the contact surface to influence the contact between the machine tool worktable and the exchange worktable.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology and relates to an airtight blowing structure and method for an exchange workbench. Background Art

[0002] The workbench is one of the important components of the machine tool. It is used to place, clamp and fix the workpiece. If the workbench accuracy is not good, it will seriously affect the processing accuracy of the workpiece. Therefore, in general, the workbench surface will have very high precision requirements, and even self-milling is required to ensure the accuracy of the workbench surface.

[0003] Multiple workbenches can be exchanged on a machine tool to meet the increasing demand for automation of machine tools. The exchangeable workbench here is the exchange table (or pallet). In addition to ensuring its own accuracy, each exchange table must ensure the consistency of its accuracy after being moved to the machine tool. Therefore, the contact surface between the exchange table and the machine tool needs to have a high degree of adhesion. An exchange table air-tight blowing structure is applied to this scenario, which can ensure the tight contact between the exchange table and the machine tool, and also ensure the consistency of the accuracy of multiple exchange tables after they are moved to the machine tool. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides an airtight blowing structure and method for an exchange workbench.

[0005] The invention discloses an airtight blowing structure for an exchange worktable. The oil cylinders are respectively connected to the machine tool worktables. There are two semicircular cylindrical blocks on both sides of the oil cylinders. Some of the semicircular cylindrical blocks are provided with airtight blowing structures. The semicircular cylindrical blocks are connected to the machine tool worktables. The machine tool worktable is provided below the exchange worktable. The semicircular cylindrical blocks on both sides of the oil cylinders are provided with airtight blowing structures. The airtight blowing structures are composed of horizontal blowing holes, vertical blowing holes and airtight blowing holes. The semicircular cylindrical blocks are respectively connected to both sides of the oil cylinders. The bottom surface of the exchange worktable is the detection surface. The digital position sensor is connected to the horizontal blowing hole through a pipeline. The horizontal blowing hole is connected to the vertical blowing hole. The other end of the vertical blowing hole is connected to a φ1.2mm airtight blowing hole.

[0006] The cylinders include a first cylinder, a second cylinder, a third cylinder, a fourth cylinder, a fifth cylinder, a sixth cylinder, a seventh cylinder, an eighth cylinder, a ninth cylinder, a tenth cylinder, an eleventh cylinder, a twelfth cylinder, a thirteenth cylinder, a fourteenth cylinder, a fifteenth cylinder, a sixteenth cylinder, a seventeenth cylinder and an eighteenth cylinder.

[0007] The airtight blowing structure is composed of a Φ8.2mm horizontal blowing hole, a Φ6mm vertical blowing hole and a Φ1.2mm airtight blowing hole.

[0008] A method for airtightly fixing an exchange worktable. An oil cylinder is connected to a machine tool worktable. When the exchange worktable is moved to the machine tool, the exchange worktable is clamped and fixed by the oil cylinder. Each oil cylinder has two semicircular cylindrical blocks on both sides. When the machine tool clamps the exchange worktable, the bottom surface of the exchange worktable is in close contact with the top surface of the semicircular cylindrical blocks, thereby ensuring the exchange accuracy of the exchange worktable.

[0009] A method for airtightness of an exchange workbench includes the steps of confirming airtightness: a semicircular cylindrical block has a horizontal blowing hole and a vertical blowing hole, and a φ1.2mm airtight blowing hole (detection nozzle); when the oil cylinder on a machine tool clamps the exchange workbench, the detection surface of the exchange workbench and the top surface of the semicircular cylindrical block of the airtight blowing structure will be in full contact, the air blowing volume here will be affected, and the pressure inside the pipeline (the horizontal blowing hole and the vertical blowing hole) will also change accordingly; the better the adhesion here, the better the sealing of the air path, the less air leakage will be, and the air pressure in the pipeline and the pipe will become higher and higher.

[0010] The advantages of the present invention are: the contact situation between the machine tool and the exchange worktable can be easily judged with a simple structure, so as to grasp the exchange accuracy of the exchange worktable and improve the processing accuracy of the machine tool with the exchange worktable; this airtight blowing structure is simple, and the relevant parts are inexpensive, which reduces costs and meets the automation needs of the machine tool in an economical way.

[0011] With the frequent exchange of workbenches, it is impossible to judge whether the machine tool and the exchange workbench are in complete and close contact each time a new workbench arrives at the machine tool. With the application of this airtight blowing structure, users can easily and accurately judge the contact between the machine tool and the exchange workbench in the machine tool operating system based on the signal information from the digital position sensor, effectively reducing accidents that affect the machining accuracy of the machine tool due to inadequate contact between the machine tool and the exchange workbench. The application of this structure plays an important role in maintaining the machining accuracy of machine tools with exchange workbench structures, and makes a significant contribution to the automation process of machine tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] in:

[0014] Figure 1 It is a structural diagram of the present invention.

[0015] Figure 2 It is a cross-sectional view of the structure AA of the present invention.

[0016] Figure 3 It is the structural diagram of the oil cylinder of the present invention.

[0017] Figure 4 This is a BB cross-section airtight blowing structure diagram of the present invention.

[0018] Figure 5 This is one of the usage state diagrams of the present invention.

[0019] Figure 6 This is the second usage state diagram of the present invention.

[0020] Figure 7 This is the third usage state diagram of the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1: Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, an exchange workbench air-tight blowing structure 28, the cylinders include a first cylinder 2, a second cylinder 3, a third cylinder 4, a fourth cylinder 5, a fifth cylinder 6, a sixth cylinder 7, a seventh cylinder 8, an eighth cylinder 9, a ninth cylinder 10, a tenth cylinder 11, an eleventh cylinder 12, a twelfth cylinder 13, a thirteenth cylinder 14, a fourteenth cylinder 15, a fifteenth cylinder 16, a sixteenth cylinder 17, a seventeenth cylinder 18 and an eighteenth cylinder 19, and the cylinders are respectively connected to the machine tool working The left semicircular cylindrical block of the fifth cylinder 6, the left semicircular cylindrical block of the first cylinder 2, the right semicircular cylindrical block of the eighth cylinder 9, the left semicircular cylindrical block of the eleventh cylinder 12, the eighteenth cylinder 19 and the right semicircular cylindrical block of the sixteenth cylinder 17 are respectively provided with an airtight blowing structure 28, the semicircular cylindrical blocks are connected to the machine tool worktable 1, and the machine tool worktable 1 is provided below the exchange worktable 21.

[0023] There are two semicircular cylindrical blocks 22 on both sides of the first cylinder 2, the second cylinder 3, the third cylinder 4, the fourth cylinder 5, the fifth cylinder 6, the sixth cylinder 7, the seventh cylinder 8, the eighth cylinder 9, the ninth cylinder 10, the tenth cylinder 11, the eleventh cylinder 12, the twelfth cylinder 13, the thirteenth cylinder 14, the fourteenth cylinder 15, the fifteenth cylinder 16, the sixteenth cylinder 17, the seventeenth cylinder 18 and the eighteenth cylinder 19.

[0024] The second blowing structure 40 is used to blow away the dust 30 (including iron filings, foreign matter, etc.) on the contact surface between the machine tool worktable and the exchange worktable, keeping the contact surface clean and tidy, and preventing dust 30 or iron filings from falling on the contact surface and affecting the contact between the machine tool worktable and the exchange worktable. This structure is provided on all semicircular cylindrical blocks.

[0025] The airtight blowing structure 28 is only arranged on six semicircular cylindrical blocks, namely, the left semicircular cylindrical block at the first oil cylinder 2, the fifth oil cylinder 6, the right semicircular cylindrical block at the eighth oil cylinder 9, the left semicircular cylindrical block at the fourteenth oil cylinder 15, the sixteenth oil cylinder 17, and the right semicircular cylindrical block at the eighteenth oil cylinder 19.

[0026] The semicircular cylindrical block 22 has a second blowing structure 40 and an airtight blowing structure 28 , respectively. The airtight blowing structure 28 includes a horizontal blowing hole 25 , a vertical blowing hole 27 and an airtight blowing hole 24 .

[0027] There are two blowing structures (ie, the second blowing structure 40 and the airtight blowing structure 28) on the semicircular cylindrical block 22, but not all semicircular cylindrical blocks have two blowing structures, and only some semicircular cylindrical blocks have two blowing structures.

[0028] The second blowing structure 40 is an ordinary blowing structure. Each semicircular cylindrical block is provided with an ordinary blowing structure. The airtight blowing structure 28 is only provided at the first oil cylinder 2, the fifth oil cylinder 6, the eighth oil cylinder 9, the fourteenth oil cylinder 15, the sixteenth oil cylinder 17 and the eighteenth oil cylinder 19. The airtight blowing structure 28 is formed by connecting respectively a Φ8.2mm horizontal blowing hole 25, a Φ6mm vertical blowing hole 27 and a Φ1.2mm airtight blowing hole 24.

[0029] Beiyi XHA2420x60-M4NC gantry automatic production line is composed of two machine tools, each of which can exchange two exchange workbenches. Figure 1 This is a schematic diagram of the exchange workbench on a single machine tool in the automatic production line. Figure 1 The main view in FIG. 1 shows a switching table (or pallet) 21 on the top and a machine tool table 1 on the bottom.

[0030] There are 18 oil cylinders connected to the machine tool worktable 1. When the exchange worktable 21 is moved to the machine tool, the exchange worktable 21 is clamped and fixed by the 18 oil cylinders. There are two semicircular cylindrical blocks 22 on both sides of each oil cylinder. When the machine tool clamps the exchange worktable 21, the bottom surface of the exchange worktable 21 is in close contact with the top surface of the semicircular cylindrical block 22, so as to ensure the exchange accuracy of the exchange worktable 21.

[0031] The contact surface machining accuracy requirements between the exchange workbench 21 and the semicircular cylindrical block 22 are relatively high, and no foreign matter 30 (dust or iron filings) can fall on them. Therefore, each semicircular cylindrical block 22 is provided with an air blowing structure to blow away the foreign matter 30 (dust and a small amount of fallen iron filings). In addition, it is also necessary to confirm the contact tightness between the exchange workbench and the machine tool. Therefore, a method is needed to detect the gap between the two contact surfaces. If the gap is within a certain numerical range, it is confirmed that the exchange workbench and the machine tool are in close contact. If the gap exceeds a certain numerical range, it is considered that the exchange workbench and the machine tool are not in close contact, which will affect the machining accuracy of the machine tool on the workpiece.

[0032] Figure 1 Among the 18 oil cylinders, 6 oil cylinders are provided with airtight blowing structures 28, such as Figure 4 As shown, the structure of the airtight blowing structure 28: semicircular cylindrical blocks 22 are respectively arranged on both sides of the cylinder, the semicircular cylindrical blocks are connected to the machine tool worktable 1, the bottom surface of the exchange worktable 21 is the detection surface 23, the digital position sensor 20 is connected to the horizontal blowing hole 25 through a pipeline, the horizontal blowing hole 25 is connected to the vertical blowing hole 27, and the other end of the vertical blowing hole 27 is connected to the φ1.2mm airtight blowing hole 24 (detection nozzle).

[0033] Each semicircular cylindrical block is provided with an airtight blowing structure 28 and a second blowing structure 40. The airtight blowing structure 28 is used to blow away foreign matter 30 (dust, iron filings, etc.) on the contact surface between the machine tool worktable and the exchange worktable to keep the contact surface clean and tidy, and prevent foreign matter 30 (dust, iron filings, etc.) from falling on the contact surface and affecting the contact between the machine tool worktable and the exchange worktable. Among them, only the semicircular cylindrical blocks on the side of the cylinders at 6 locations, namely the first cylinder 2, the fifth cylinder 6, the eighth cylinder 9, the eleventh cylinder 12, the sixteenth cylinder 17 and the eighteenth cylinder 19, are provided with an airtight blowing structure 28. The airtight blowing structure 28 is composed of a Φ8.2mm horizontal blowing hole 25, a Φ6mm vertical blowing hole 27 and a Φ1.2mm airtight blowing hole 24.

[0034] Example 2: Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a method for airtightness of an exchange worktable includes the steps of confirming airtightness: a semicircular cylindrical block 22 has a horizontal blowing hole 25 and a vertical blowing hole 27, and a φ1.2mm airtight blowing hole 24 (detection nozzle). When the oil cylinder on the machine tool clamps the exchange worktable, the detection surface 23 of the exchange worktable 21 and the top surface of the semicircular cylindrical block 22 of the airtight blowing structure 28 will be in complete contact, and the blowing volume here will be affected, and the pressure inside the pipeline (the horizontal blowing hole 25 and the vertical blowing hole 27) will also change accordingly. The better the adhesion here, the better the sealing of the air path, the less air leakage will be, and the air pressure in the pipeline and the pipe will become higher and higher.

[0035] The pipeline is connected to the digital position sensor 20 of SMC (ISA3-GCP-1LB). When the pressure on the pipeline and the pipe changes and reaches a certain value, the digital position sensor 20 will sense the pressure change and display the corresponding characters on the screen of the digital position sensor 20. Based on the characters, the contact tightness between the exchange workbench 21 and the machine tool can be confirmed.

[0036] The present invention is provided with 6 airtight blowing structures 28, and the airtight blowing structures 28 include a first airtight blowing structure 28, a second airtight blowing structure 28, a third airtight blowing structure 28, a fourth airtight blowing structure 28, a fifth airtight blowing structure 28 and a sixth airtight blowing structure 28. The first oil cylinder 2 is connected to the first airtight blowing structure 28, the fifth oil cylinder 6 is connected to the second airtight blowing structure 28, the eighth oil cylinder 9 is connected to the third airtight blowing structure 28, the eleventh oil cylinder 12 is connected to the fourth airtight blowing structure 28, the sixteenth oil cylinder 17 is connected to the fifth airtight blowing structure 28, and the eighteenth oil cylinder 19 is connected to the sixth airtight blowing structure 28.

[0037] There are only three digital position sensors 20, which is equivalent to two air-tight blowing structures 28 sharing one digital position sensor. Therefore, when the system displays that the three digital position sensors (the first digital position sensor 20, the second digital position sensor and the third digital position sensor) are all in the ON state, it is considered that the exchange workbench is in full contact with the machine tool.

[0038] The first digital position sensor 20 is respectively connected to the left semicircular cylindrical block of the first cylinder 2 and the left semicircular cylindrical block of the fifth cylinder 6, the second digital position sensor is respectively connected to the right semicircular cylindrical block of the eighth cylinder 9 and the right semicircular cylindrical block of the eleventh cylinder 12, and the third digital position sensor is respectively connected to the right semicircular cylindrical block of the sixteenth cylinder 17 and the right semicircular cylindrical block of the eighteenth cylinder 19.

[0039] like Figure 5As shown, the detection distance is 0.02-0.15mm. If there is foreign matter between the contact surface of the exchange table and the machine tool, causing the exchange table to detach from the machine tool, there will be a gap and foreign matter 30 between the contact surface 23 of the exchange table and the machine tool. The blowing volume on the airtight blowing structure 28 will not be greatly affected, so it will not affect the pressure of the air path. The screen of the digital position sensor 20 will display OFF, indicating that the exchange table is not in full contact with the machine tool.

[0040] like Figure 6 As shown in the figure, if the exchange table and the machine tool are not in full contact, but the gap is within the set allowable range, the screen of the digital position sensor 20 will display ON, and the grid below will be half full. This is a relatively ideal state, and it is also believed that the exchange table and the machine tool are in close contact and good adhesion, and the allowable gap range between the contact surface of the exchange table and the machine tool is 0.02-0.15mm.

[0041] Or Figure 7 As shown, the detection distance is 0.02-0.15mm, the exchange table is in full and tight contact with the machine tool, and its sealing is particularly good, then the leakage on the detection surface between the exchange table and the machine tool is zero, at this time the pressure on the air blowing path is the highest, the screen of the digital position sensor 20 will display ON, and the grid below will also be full, indicating that the exchange table is in full contact with the contact surface of the machine tool. At the same time, this is also a theoretically ideal state. In actual use, if Figure 6 There are many cases shown.

[0042] The invention discloses an air-tight blowing structure and method for an exchange worktable. The worktable is provided with 18 oil cylinders, which are respectively connected to a machine tool worktable. Two semicircular cylindrical blocks are respectively provided on both sides of the oil cylinders, which are connected to the machine tool worktable. Each semicircular cylindrical block is provided with an air-tight blowing structure for blowing away dust, iron filings and the like on the contact surface between the machine tool worktable and the exchange worktable, so as to keep the contact surface clean and tidy and prevent dust or iron filings from falling on the contact surface and affecting the contact between the machine tool worktable and the exchange worktable. Some of the semicircular cylindrical blocks are provided with an air-tight blowing structure, which is composed of a Φ8.2mm horizontal blowing hole 25, a Φ6mm vertical blowing hole 27 and a Φ1.2mm air-tight blowing hole 24. The bottom surface of the exchange worktable is a detection surface, a digital position sensor is connected to the horizontal blowing hole through a pipeline, the horizontal blowing hole is connected to the vertical blowing hole, and the other end of the vertical blowing hole is connected to a Φ1.2mm air-tight blowing hole.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An airtight blowing structure for an exchange workbench, characterized in that: The oil cylinder is connected to the machine tool worktable respectively, and there are two semicircular cylindrical blocks on both sides of the oil cylinder respectively, some of which are provided with an airtight blowing structure, the semicircular cylindrical blocks are connected to the machine tool worktable, and there is a machine tool worktable under the exchange worktable. There are airtight blowing structures on the semicircular cylindrical blocks on both sides of the oil cylinder, and the airtight blowing structure is composed of horizontal blowing holes, vertical blowing holes and airtight blowing holes. The semicircular cylindrical blocks are connected to both sides of the oil cylinder respectively, and the bottom surface of the exchange worktable is the detection surface. The digital position sensor is connected to the horizontal blowing hole through a pipeline, the horizontal blowing hole is connected to the vertical blowing hole, and the other end of the vertical blowing hole is connected to a φ1.2mm airtight blowing hole.

2. The airtight blowing structure of the exchange workbench according to claim 1 is characterized in that: The cylinders include a first cylinder, a second cylinder, a third cylinder, a fourth cylinder, a fifth cylinder, a sixth cylinder, a seventh cylinder, an eighth cylinder, a ninth cylinder, a tenth cylinder, an eleventh cylinder, a twelfth cylinder, a thirteenth cylinder, a fourteenth cylinder, a fifteenth cylinder, a sixteenth cylinder, a seventeenth cylinder and an eighteenth cylinder.

3. The airtight blowing structure of the exchange workbench according to claim 1 is characterized in that: The airtight blowing structure is composed of a Φ8.2mm horizontal blowing hole, a Φ6mm vertical blowing hole and a Φ1.2mm airtight blowing hole.

4. A method for airtight bonding of an exchange workbench, characterized in that: The machine tool workbench is connected to an oil cylinder. When the exchange workbench is moved to the machine tool, the exchange workbench is clamped and fixed by the oil cylinder. There are two semicircular cylindrical blocks on both sides of each oil cylinder. When the machine tool clamps the exchange workbench, the bottom surface of the exchange workbench is in close contact with the top surface of the semicircular cylindrical block, so as to ensure the exchange accuracy of the exchange workbench.

5. The method for airtight bonding of an exchange workbench according to claim 4, characterized in that: The process includes steps for confirming the airtightness: the semicircular cylindrical block has horizontal and vertical holes for blowing air, and a φ1.2mm airtight blowing hole (detection nozzle). When the oil cylinder on the machine tool clamps the exchange table, the detection surface of the exchange table and the top surface of the semicircular cylindrical block of the airtight blowing structure will be in complete contact. The air blowing volume here will be affected, and the pressure inside the pipeline (horizontal and vertical holes for blowing air) will also change accordingly. The better the adhesion here, the better the sealing of the air path, the less air leakage will be, and the air pressure in the pipeline and pipe will become higher and higher.

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