Precision machining table

Abstract

This invention relates to the field of fixture equipment technology, and discloses a precision machining machine tool, including a support base and a detection system. A power component is mounted on the support base, and a first connecting plate is mounted on the output shaft of the power component. A fixed seat is mounted on the support base, and a second connecting plate is rotatably connected to the fixed seat. A support plate is welded between the first and second connecting plates. A fixture is mounted on the support plate, and the fixture includes a fixture base and a fixture body. A positioning ring is detachably connected to the fixture base. The positioning ring includes a positioning part, a connecting part, and a limiting part connected in sequence. The inner and outer surfaces of the positioning part are both conical surfaces. A positioning seat is detachably connected to the support plate, and the positioning seat has a positioning groove. The inner and outer surfaces of the positioning groove are both conical surfaces. The detection system includes a control unit and an air supply unit. The air supply unit ensures an airtightness alarm. The control unit detects whether the positioning ring and the positioning seat are coaxial. The technical solution of this invention can quickly and accurately achieve fixture positioning.

Description

[0001] This application is a divisional application of application number 2023106399743, filed on May 31, 2023, entitled "Method for quick change of fixtures in precision machining process". Technical Field

[0002] This invention relates to the field of fixture equipment technology, and more specifically to a precision machining machine. Background Technology

[0003] Precision machining is a process that uses machining machinery to change the shape, size, or properties of a workpiece. With the continuous development of new technologies and the increase in market demand, industrial production is moving towards mass standardization, and products are gradually becoming more diversified. In the precision machining process, the same machining equipment often needs to process different products in rotation, and different products correspond to different fixtures. Therefore, when processing different products, it is necessary to change the fixtures according to the shape of the workpiece.

[0004] Existing fixture replacement methods typically include the following steps: S1: Remove the original fixture from the support plate of the precision machining machine; S2: Replace the fixture to be replaced. Specifically, a cylindrical pin is fixedly connected to the bottom of the fixture, and a positioning hole corresponding to the cylindrical pin is provided on the support plate of the precision machining machine. During replacement, the fixture is first positioned by engaging the cylindrical pin with the positioning hole, and then the fixture is fixed to the support plate by a locking device. The disadvantage of this technical solution is that, in order to facilitate the disassembly of the cylindrical pin, there is usually a gap between the cylindrical pin and the positioning hole. Due to the existence of the gap, the positioning is inaccurate, requiring repositioning and retesting, which makes the fixture replacement inefficient. Summary of the Invention

[0005] The present invention aims to provide a method for quickly changing fixtures in the process of precision machining products, which can quickly and accurately achieve the positioning of the fixtures.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a method for quickly changing fixtures in precision machining processes, comprising the following steps:

[0007] S1: Remove the original clamps;

[0008] S2: Replace the fixture that needs to be switched:

[0009] The first step is to position the fixture to be replaced onto the support plate. The fixture includes a fixture base and a fixture body. A positioning ring is detachably connected to the fixture base. The positioning ring includes a positioning part, a connecting part, and a limiting part connected in sequence. The positioning part is located outside the fixture base, and both the outer and inner sides of the positioning part are tapered surfaces. A positioning seat is detachably connected to the support plate. The positioning seat has a positioning groove, and both the inner and outer sides of the positioning groove are tapered surfaces. When positioning the fixture, the positioning part is inserted into the positioning groove to achieve the positioning of the fixture.

[0010] The second step is to fix the fixture that needs to be replaced onto the support plate.

[0011] The beneficial effects of this solution are as follows: Since the outer and inner sides of the positioning part are both conical surfaces, and the inner and outer sides of the positioning groove are both conical surfaces, the conical surfaces on the positioning groove and the conical surfaces of the positioning part can cooperate to simultaneously position the inner and outer sides of the positioning part, thereby improving the accuracy of positioning. At the same time, positioning is also faster and more convenient.

[0012] Because the positioning ring is detachably connected to the fixture base, it is easy to remove and replace the positioning ring; because the positioning seat is detachably connected to the support plate, it is easy to remove and replace the positioning seat.

[0013] Furthermore, in the first step of S2, there are two positioning rings and two positioning seats. The two positioning rings are located on the left and right sides of the fixture base, respectively, and the two positioning rings are set diagonally. The position of the positioning seat corresponds one-to-one with the position of the positioning ring.

[0014] The beneficial effects of this solution are as follows: Since the two positioning rings are located on the left and right sides of the fixture base respectively, and the two positioning rings are set diagonally, the position of the positioning seat corresponds one-to-one with the position of the positioning ring. Therefore, this technical solution can complete the positioning of the fixture using two positioning rings and a positioning base. The operation is simple and the positioning is accurate and reliable.

[0015] Furthermore, in the first step of S2, the interior of the positioning seat is a hollow structure.

[0016] The beneficial effects of this solution are as follows: If the positioning seat is a solid structure, when the workpiece is being processed, iron filings and other debris will fall onto the positioning seat through the positioning ring, thus accumulating inside the positioning ring. This requires regular cleaning of the debris inside the positioning ring, increasing the number of processing steps and reducing processing efficiency.

[0017] Furthermore, in the first step of S2, both the positioning ring and the positioning seat are made of GCr15 material, with a heat treatment hardness of HRC58-65.

[0018] The beneficial effects of this solution are as follows: Due to the high hardness, good wear resistance, uniform structure, and high contact fatigue performance of GCr15 material, the positioning ring and positioning seat made of GCr15 material inherit the advantages of GCr15 material, making positioning more accurate.

[0019] Furthermore, it also includes S3, installation accuracy detection; the installation accuracy is detected by a detection system, which includes a control unit and an air supply unit. The air supply unit ensures airtightness alarm to prevent the workpiece from being mispositioned; the control unit is used to detect whether the positioning ring and the positioning base are coaxial.

[0020] The beneficial effects of this solution are as follows: Due to the setting of the detection system, it can be used to detect whether the positioning ring and the positioning base are coaxial. If the positioning ring and the positioning base are not coaxial, it can promptly remind the operator to reassemble, thus avoiding inaccurate processing accuracy and increased scrap rate during workpiece processing due to the misalignment of the positioning ring and the positioning base.

[0021] Furthermore, the control unit in S3 includes a controller, a gas pressure sensor, and a buzzer. Both the gas pressure sensor and the buzzer are electrically connected to the controller. A first partition is fixedly connected to the top of the positioning ring, and a second partition is fixedly connected to the bottom of the positioning seat. When the positioning part is engaged in the positioning groove, the interior of the positioning ring and the interior of the positioning groove are connected to form a detection chamber. The gas pressure sensor is installed inside the positioning seat.

[0022] The beneficial effects of this solution are as follows: When checking whether the positioning ring and the positioning base are coaxial, the air supply unit fills the positioning groove with air, and the gas pressure sensor detects the gas pressure in the detection chamber and compares it with the standard value. If the pressure in the detection chamber decreases or increases, it indicates that the positioning ring and the positioning base are not coaxial. At this time, the gas pressure sensor will feed the information back to the controller, and the controller will control the buzzer to sound an alarm, reminding the operator to reassemble.

[0023] Furthermore, in the first step of S2, the positioning seat is provided with an annular cavity, and the bottom of the positioning groove is provided with several connecting holes, the bottom of each connecting hole being connected to the annular cavity.

[0024] The beneficial effects of this solution are as follows: When detecting whether the positioning ring and the positioning base are coaxial, during the process of snapping the positioning part into the positioning groove, the positioning part forces the gas at the bottom of the positioning groove into the annular cavity, where it accumulates. If the positioning ring and the positioning base are not coaxial, when the positioning part is tightly fitted to the inner side of the positioning groove, a small amount of gas accumulated in the annular cavity will leak. The gas pressure in the detection chamber is detected by a gas pressure sensor and compared with a standard value. If the pressure in the detection chamber decreases, it indicates that the positioning ring and the positioning base are not coaxial. At this time, the gas pressure sensor feeds the information back to the controller, which controls the buzzer to sound an alarm, reminding the operator to reassemble. When the gap between the positioning part and the inner side of the positioning groove is relatively large, a large amount of gas accumulated in the annular cavity will leak and enter the detection chamber from the positioning groove. The gas pressure sensor detects the gas pressure in the detection chamber and compares it with a standard value. If the pressure in the detection chamber increases, it indicates that the positioning ring and the positioning base are not coaxial. At this time, the gas pressure sensor feeds the information back to the controller, which controls the buzzer to sound an alarm, reminding the operator to reassemble.

[0025] Furthermore, the air supply unit in S3 includes an air supply device. The side of the positioning seat is provided with an air inlet hole, which is connected to the annular cavity. The side of the support plate is provided with an air inlet channel that is connected to the air inlet hole. An air inlet pipe that is connected to the air inlet channel is fixedly connected to the side of the support plate. The length of the air inlet pipe is less than the distance between the bottom of the support plate and the support base. The air outlet pipe of the air supply device is detachably connected to the air inlet pipe.

[0026] The beneficial effects of this solution are as follows: When checking whether the positioning ring and the positioning base are coaxial, the air supply equipment is activated, which fills the annular cavity with air. The air in the annular cavity enters the positioning groove through the connecting hole. If the positioning ring and the positioning base are not coaxial, when the positioning part fits tightly against the inner side of the positioning groove, less air enters the detection chamber from the positioning groove. The gas pressure sensor detects the gas pressure in the detection chamber and compares it with the standard value. If the pressure in the detection chamber decreases, it indicates that the positioning ring and the positioning base are not coaxial. At this time, the gas pressure sensor feeds the information back to the controller, and the controller activates the buzzer to sound an alarm, reminding the operator to reassemble. When the gap between the positioning part and the inner side of the positioning groove is relatively large, more air enters the detection chamber from the positioning groove. The gas pressure sensor detects the gas pressure in the detection chamber and compares it with the standard value. If the pressure in the detection chamber increases, it indicates that the positioning ring and the positioning base are not coaxial. At this time, the gas pressure sensor feeds the information back to the controller, and the controller activates the buzzer to sound an alarm, reminding the operator to reassemble.

[0027] Furthermore, the intake pipe in the S3 is detachably connected to a sealing plug.

[0028] The beneficial effects of this solution are as follows: After the installation accuracy test is completed, the air supply equipment needs to be removed from the air inlet pipe to facilitate the processing of the workpiece. Since iron filings and other debris will be generated during the processing of the workpiece, the air inlet pipe can be blocked with a sealing plug to prevent iron filings and other debris from entering the air inlet pipe and clogging the annular cavity. Attached Figure Description

[0029] Figure 1 This is a three-dimensional diagram of Example 1;

[0030] Figure 2 A 3D view of Example 1 with the right-side fixture body removed;

[0031] Figure 3 This is a 3D view of Example 1 with the right-side clamp removed;

[0032] Figure 4 This is a three-dimensional view of the positioning ring in Example 1;

[0033] Figure 5 This is a three-dimensional view of the positioning seat in Example 1;

[0034] Figure 6 This is a three-dimensional diagram showing the cooperation between the air supply unit and the positioning unit in Example 2;

[0035] Figure 7 This is a three-dimensional view of the positioning seat in Example 2;

[0036] Figure 8 for Figure 7 Sectional view along the AA direction. Detailed Implementation

[0037] Methods for quick fixture changes in precision machining processes

[0038] The following detailed description illustrates the specific implementation method:

[0039] The reference numerals in the accompanying drawings include: support base 1, power component 2, fixed seat 3, first connecting plate 4, second connecting plate 5, support plate 6, fixture base 7, fixture body 8, workpiece 9, first bolt hole 10, first receiving hole 11, positioning ring 12, positioning part 13, connecting part 14, limiting part 15, second bolt hole 16, second receiving hole 17, positioning seat 18, locking bolt 19, positioning groove 20, gas pressure sensor 21, first partition 22, second partition 23, detection chamber 24, blower 25, annular cavity 26, connecting hole 27, air inlet 28, air inlet pipe 29, inner side of positioning groove 30, and outer side of positioning groove 31.

[0040] Example 1

[0041] like Figure 1The precision machining table shown includes a support base 1, a locking component and a positioning unit. The positioning unit includes a positioning ring 12 and a positioning seat 18. In this embodiment, the locking component is a locking bolt 19.

[0042] like Figure 1 As shown, a power component 2 is installed on the right end of the support base 1. A first connecting plate 4 is bolted to the output shaft of the power component 2. A fixed seat 3 is installed on the left end of the support base 1. A second connecting plate 5 is rotatably connected to the right side of the fixed seat 3. A support plate 6 is welded between the first connecting plate 4 and the second connecting plate 5. There is a gap between the bottom of the support plate 6 and the support base 1. Two clamps are installed on the support plate 6. Each clamp includes a clamp base 7 and a clamp body 8. The clamp body 8 holds a workpiece 9 and is bolted to the clamp base 7. In this embodiment, the power component 2 is a motor of model 130BYG350B-N. It should be noted that this embodiment is illustrated by replacing the clamp on the right side of the support plate 6.

[0043] like Figure 2 As shown, each of the four corners of the fixture base 7 has a first bolt hole 10, and the top of the fixture base 7 has two first receiving holes 11 on each of its left and right sides. Positioning rings 12 are engaged in the first receiving holes 11. Preferably, there are two positioning rings 12, located in the first receiving holes 11 on the left and right sides of the fixture base 7, respectively, and the two positioning rings 12 are arranged diagonally. Figure 4 As shown, the positioning ring 12 includes a positioning part 13, a connecting part 14 and a limiting part 15 from bottom to top. The limiting part 15, the connecting part 14 and the positioning part 13 are integrally formed. The outer and inner sides of the positioning part 13 are both conical surfaces, and the positioning part 13 extends out of the bottom of the fixture base 7 and is located below the fixture base 7.

[0044] like Figure 3 As shown, the support plate 6 has four second bolt holes 16 and four second receiving holes 17. The positions of the second bolt holes 16 correspond one-to-one with the positions of the first bolt holes 10, and the positions of the second receiving holes 17 correspond one-to-one with the positions of the first receiving holes 11. There are two positioning seats 18, which are respectively engaged in the second receiving holes 17 on the left and right sides of the support plate 6. The positions of the positioning seats 18 correspond one-to-one with the positions of the positioning rings 12. The upper surface of the positioning seats 18 is flush with the upper surface of the support plate 6. The clamp base 7 is connected to the support plate 6 by four locking bolts 19. Specifically, the locking bolts 19 pass through the first bolt holes 10 and the second bolt holes 16 in sequence to fix the clamp base 7 to the support plate 6. Figure 5As shown, the upper end of the positioning seat 18 has a positioning groove 20. The inner side 30 and the outer side 31 of the positioning groove are both tapered surfaces, and the positioning part 13 can be engaged in the positioning groove 20. The interior of the positioning seat 18 is a hollow structure. Both the positioning ring 12 and the positioning seat 18 are made of GCr15, and their heat treatment hardness is HRC58-65.

[0045] A method for quickly changing fixtures during precision machining processes includes the following steps:

[0046] S1: Remove the original fixture; specifically, remove the four locking bolts 19 on the fixture base 7 one by one, then remove the fixture base 7 from the support plate 6 and replace the entire fixture.

[0047] S2: Replace the fixture that needs to be switched;

[0048] The first step is to position the fixture to be replaced onto the support plate 6. Specifically, align the positioning ring 12 on the fixture base 7 with the positioning seat 18 on the support plate 6 so that the positioning part 13 is locked in the positioning groove 20, and the fixture base 7 is positioned by the two positioning units at opposite corners.

[0049] The second step is to fix the fixture to be replaced onto the support plate 6. After the fixture base 7 is positioned, the locking bolts 19 are passed through the first bolt hole 10 and the second bolt hole 16 in sequence and the fixture base 7 is fixed onto the support plate 6. Specifically, the fixture base 7 is first pre-fixed onto the support plate 6 with four locking bolts 19, and then the four locking bolts 19 are tightened in sequence.

[0050] Example 2

[0051] Based on Embodiment 1, a detection system is also included, which includes a control unit and an air supply unit.

[0052] The control unit includes a controller, a gas pressure sensor 21, and a buzzer. Both the gas pressure sensor 21 and the buzzer are electrically connected to the controller. Specifically, for example... Figure 6 and Figure 8 As shown, a first partition 22 is welded to the top of the positioning ring 12, and a second partition 23 is welded to the bottom of the positioning seat 18. When the positioning part 13 is engaged with the positioning groove 20, the interior of the positioning ring 12 and the interior of the positioning groove 20 are connected to form a detection chamber 24. The gas pressure sensor 21 is installed inside the positioning seat 18. In this embodiment, the controller is an STM32 microcontroller, the gas pressure sensor 21 is an HSP-W110MA, and the buzzer is a KMB-P80D4.

[0053] like Figure 6-8As shown, the air supply unit includes an air supply device, which in this embodiment is a blower 25. An annular cavity 26 is formed on the positioning seat 18, and several connecting holes 27 are formed at the bottom of the positioning groove 20. The bottom of each connecting hole 27 communicates with the annular cavity 26. An air inlet 28 is formed on the side of the positioning seat 18, communicating with the annular cavity 26. An air intake channel communicating with the air inlet 28 is formed on the front side of the support plate 6. An air intake pipe 29 is welded to the front side of the support plate 6, communicating with the air intake channel. The length of the air intake pipe 29 is less than the distance between the bottom of the support plate 6 and the support base 1. A sealing plug is snapped onto the air intake pipe 29. The air outlet pipe of the blower 25 can also be snapped onto the air intake pipe 29.

[0054] The method for quickly changing fixtures in precision machining processes also includes S3, installation accuracy testing; specifically, after the fixture unit is fixed, the sealing plug on the air inlet pipe 29 is removed, the air outlet pipe on the blower 25 is connected to the air inlet pipe 29, and the blower 25 is turned on. The blower 25 fills the annular cavity 26 with air, and the air in the annular cavity 26 enters the positioning groove 20 through the connecting hole 27. If the positioning ring 12 and the positioning seat 18 are not coaxial, when the positioning part 13 fits tightly with the inner side surface 30 of the positioning groove, less air enters the detection chamber 24 from the positioning groove 20. The gas pressure sensor 21 detects the gas pressure in the detection chamber 24 and compares it with the standard value. If the pressure in the detection chamber 24 decreases... If the positioning ring 12 and the positioning seat 18 are not coaxial, the gas pressure sensor 21 will send information to the controller, which will then activate the buzzer to sound an alarm, reminding the operator to reassemble. When the gap between the positioning part 13 and the inner side 30 of the positioning groove is large, more air will enter the detection chamber 24 from the positioning groove 20. The gas pressure sensor 21 will detect the gas pressure in the detection chamber 24 and compare it with the standard value. If the pressure in the detection chamber 24 has increased, it indicates that the positioning ring 12 and the positioning seat 18 are not coaxial. In this case, the gas pressure sensor 21 will send information to the controller, which will then activate the buzzer to sound an alarm, reminding the operator to reassemble. After the test is completed, the blower 25 will be removed, and the sealing plug will be placed on the air inlet pipe 29.

[0055] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A precision machining table, characterized in that: Includes a support base and a detection system; A power component is installed on the right end of the support base. A first connecting plate is installed on the output shaft of the power component. A fixed seat is installed on the left end of the support base. A second connecting plate is rotatably connected to the right side of the fixed seat. A support plate is welded between the first and second connecting plates. There is a gap between the bottom of the support plate and the support base. A clamp is installed on the support plate. The clamp includes a clamp base and a clamp body. The clamp body holds the workpiece. The clamp body is bolted to the clamp base. A positioning ring is detachably connected to the clamp base. The positioning ring includes a positioning part, a connecting part, and a limiting part connected in sequence. The positioning part is located outside the clamp base. The outer and inner sides of the positioning part are both conical surfaces. A positioning seat is detachably connected to the support plate. The positioning seat has a positioning groove. The inner and outer sides of the positioning groove are both conical surfaces. The positioning part can be inserted into the positioning groove. The positioning seat has an annular cavity. The bottom of the positioning groove has several connecting holes. The bottom of each connecting hole communicates with the annular cavity. The detection system includes a control unit and an air supply unit. The air supply unit ensures airtightness alarms to prevent incorrect placement of the workpiece to be processed. The control unit is used to detect whether the positioning ring and the positioning base are coaxial. The air supply unit includes an air supply device. The side of the positioning base is provided with an air inlet hole that communicates with the annular cavity. The side of the support plate is provided with an air inlet channel that communicates with the air inlet hole. An air inlet pipe that communicates with the air inlet channel is fixedly connected to the side of the support plate. The length of the air inlet pipe is less than the distance between the bottom of the support plate and the support base. The air outlet pipe of the air supply device is detachably connected to the air inlet pipe.

2. The precision machining table according to claim 1, characterized in that: There are two positioning rings and two positioning seats. The two positioning rings are located on the left and right sides of the fixture base, respectively, and the two positioning rings are set diagonally. The positions of the positioning seats correspond one-to-one with the positions of the positioning rings.

3. The precision machining table according to claim 2, characterized in that: The positioning base has a hollow internal structure.

4. The precision machining table according to claim 3, characterized in that: Both the positioning ring and the positioning seat are made of GCr15 material, and the heat treatment hardness is HRC58-65.

5. The precision machining table according to claim 1, characterized in that: The control unit includes a controller, a gas pressure sensor, and a buzzer. Both the gas pressure sensor and the buzzer are electrically connected to the controller. A first partition is fixedly connected to the top of the positioning ring, and a second partition is fixedly connected to the bottom of the positioning seat. When the positioning part is engaged in the positioning groove, the inside of the positioning ring and the inside of the positioning groove are connected to form a detection chamber. The gas pressure sensor is installed inside the positioning seat.

6. The precision machining table according to claim 5, characterized in that: A sealing plug is detachably connected to the air intake pipe.

Images