Automatic positioning tool for hemispherical workpiece

Abstract

The utility model relates to an automatic positioning tool for a hemispherical workpiece, and relates to the field of numerical control machining technologies. The semi-spherical workpiece machining device comprises a machining table, a positioning table is fixedly installed on the machining table, a spherical groove used for containing a semi-spherical workpiece is formed in the positioning table, a chip removal opening is formed in the positioning table in a penetrating mode, and the chip removal opening is located in the groove bottom of the spherical groove; four positioning seats are installed on the machining table in a sliding mode, the four positioning seats are rotationally symmetrical about the positioning table, and positioning blocks used for fixing hemispherical workpieces are fixedly installed on the four positioning seats correspondingly. The device further comprises a driving mechanism, a clamping control module and an end face positioning mechanism. The semi-spherical workpiece positioning device can quickly and stably position the semi-spherical workpiece.

Description

Technical Field

[0001] This application relates to the field of CNC machining technology, and in particular to an automatic positioning fixture for hemispherical workpieces. Background Technology

[0002] Currently, existing positioning technologies can meet the positioning requirements for products with obvious positioning features. However, for products with indistinct positioning features, such as hemispherical shells, the positioning is more difficult because their outer curved surfaces are arc-shaped and there is no corresponding positioning reference. Therefore, most of the component assembly processes for hemispherical shells still use manual positioning methods.

[0003] During the assembly of related components on the inner curved surface of the hemispherical shell, the operators encountered difficulties due to the unpredictable assembly process, which negatively impacted the assembly process and resulted in low production efficiency. Therefore, improvements are needed. Utility Model Content

[0004] To enable rapid and stable positioning of hemispherical workpieces, this application provides an automatic positioning fixture for hemispherical workpieces.

[0005] The automatic positioning fixture for a hemispherical workpiece provided in this application adopts the following technical solution:

[0006] An automatic positioning fixture for a hemispherical workpiece includes a processing table, on which a positioning table is fixedly installed. The positioning table has a spherical groove for placing the hemispherical workpiece, and a chip discharge port is provided through the positioning table, which is located at the bottom of the spherical groove.

[0007] Four positioning seats are slidably mounted on the processing table. The four positioning seats are rotationally symmetrical about the positioning table. Each of the four positioning seats has a rubber positioning block fixedly mounted on it for fixing the hemispherical workpiece.

[0008] Also includes:

[0009] A drive mechanism, fixedly mounted on the processing table, is used to drive the four positioning seats to slide toward or away from the positioning table.

[0010] A clamping control module is fixedly installed on the processing table and is used to detect the position of any of the positioning seats and output a control signal when any of the positioning seats moves to a set position.

[0011] An end face positioning mechanism is fixedly installed on the positioning seat and is connected to the signal output terminal of the clamping control module. It is used to receive the control signal and clamp and fix the end face of the hemispherical workpiece.

[0012] The signal output terminal of the clamping control module is connected to the signal input terminal of the drive mechanism, and the drive mechanism receives the control signal and stops driving.

[0013] By adopting the above technical solution, during the actual production and processing, the operator can place the spherical surface of the hemispherical workpiece in the spherical groove and start the positioning fixture by pressing the start button on the processing table. The drive mechanism drives the four positioning seats to move towards the processing table. When the four rubber positioning blocks are pressed against the bottom of the hemispherical workpiece and the positioning seats move to the set position, the clamping control module controls the drive mechanism to stop continuously driving the positioning seats to slide. The end face positioning mechanism clamps and fixes the top end face of the hemispherical workpiece, which can achieve the technical effect of automatically clamping the side and top end faces of the hemispherical workpiece. Since the spherical surface of the hemispherical workpiece is embedded in the spherical groove, combined with the end face positioning mechanism and the rubber positioning blocks, the hemispherical workpiece can be stably and quickly fixed, which can provide effective protection for subsequent CNC machining processes. Moreover, the waste generated during CNC machining can be discharged through the chip discharge port at the bottom of the spherical groove. The operator can place a material trough for collecting waste under the positioning table for easy collection of waste.

[0014] Preferably, each of the positioning seats has a trapezoidal protrusion fixedly installed at its bottom, and the processing table has four sliding grooves that are adapted to the four trapezoidal protrusions. The four trapezoidal protrusions are respectively slidably disposed in the four sliding grooves.

[0015] By adopting the above technical solution, the sliding connection between the positioning seat and the processing table can be achieved through the trapezoidal protrusion and the sliding groove on the processing table. Furthermore, the trapezoidal protrusion combined with the trapezoidal sliding groove can effectively reduce the occurrence of the positioning seat falling out of the sliding groove.

[0016] Preferably, a positioning plate is fixedly installed on the side of the four positioning seats near the positioning platform, and four limiting grooves are respectively opened on the positioning platform. The four limiting grooves are coaxially arranged with the four sliding grooves, and the four positioning plates are slidably arranged in the four limiting grooves.

[0017] The four rubber positioning blocks are respectively fixedly installed on the four positioning plates, and the side of each rubber positioning block closest to the positioning platform is rounded.

[0018] By adopting the above technical solution, the side of the hemispherical workpiece can be clamped and held by the rubber positioning block; by setting the upper limit groove of the positioning platform, the occurrence of left and right displacement of the positioning plate can be reduced, further improving the stability of clamping the hemispherical workpiece.

[0019] Preferably, four mounting platforms are fixedly installed on the processing table, and the driving mechanism includes four first telescopic cylinders. The cylinder bodies of the four first telescopic cylinders are respectively fixedly installed on the four mounting platforms, and the cylinder shafts of the four first telescopic cylinders are respectively fixedly connected to the four positioning seats.

[0020] By adopting the above technical solution, the first telescopic cylinder can extend or retract the cylinder shaft, thereby driving four positioning seats to move simultaneously toward or away from the positioning platform.

[0021] Preferably, a connecting bracket is fixedly installed on each of the four positioning seats, and the end face positioning mechanism includes a second telescopic cylinder fixedly installed on each of the four connecting brackets, and a rubber pad for clamping the end face of the hemispherical workpiece is fixedly installed on the cylinder shaft end of each of the four second telescopic cylinders.

[0022] By adopting the above technical solution, when the four positioning seats slide to the set position, the second telescopic cylinder extends the cylinder shaft, so that the rubber pad is pressed against the top end face of the hemispherical workpiece, thereby achieving the technical effect of clamping and positioning the top end face of the hemispherical workpiece.

[0023] Preferably, the clamping control module includes:

[0024] An infrared ranging sensor is fixedly mounted on any of the mounting platforms and is used to detect the distance between itself and the positioning base and output a sensed distance signal.

[0025] The comparator chip has its signal input terminal connected to the signal output terminal of the infrared ranging sensor, and is used to receive the sensing distance signal and output the control signal when the sensing distance reaches a set value.

[0026] By adopting the above technical solution, during the movement of the positioning seat, the infrared ranging sensor detects the sensing distance between itself and the positioning seat in real time. By working with the comparator chip, it can detect the position of the positioning seat and automatically control the positioning seat to stop sliding when it reaches the set position, and drive the second telescopic cylinder to clamp the top end face of the hemispherical workpiece, thus achieving the technical effects of automatic positioning and automatic clamping.

[0027] In summary, the automatic positioning fixture for hemispherical workpieces provided in this application has at least one of the following beneficial technical effects:

[0028] 1. During actual production and processing, the operator can place the spherical surface of the hemispherical workpiece in the spherical groove and start the positioning fixture by pressing the start button on the processing table. The drive mechanism drives the four positioning seats to move towards the processing table. When the four rubber positioning blocks are pressed against the bottom of the hemispherical workpiece and the positioning seats move to the set position, the clamping control module controls the drive mechanism to stop continuously driving the positioning seats to slide. The end face positioning mechanism clamps and fixes the top end face of the hemispherical workpiece, which can achieve the technical effect of automatically clamping the side and top end faces of the hemispherical workpiece. Since the spherical surface of the hemispherical workpiece is embedded in the spherical groove, combined with the end face positioning mechanism and rubber positioning blocks, the hemispherical workpiece can be stably and quickly fixed, which can provide effective protection for subsequent CNC machining processes.

[0029] 2. Furthermore, the waste chips generated during CNC machining can be discharged through the chip discharge port at the bottom of the spherical groove. Operators can place a material trough for collecting waste chips under the positioning table for easy collection. Attached Figure Description

[0030] Figure 1 This is a schematic diagram illustrating the overall structure of the positioning tooling in an embodiment of this application.

[0031] Figure 2 This is a schematic diagram illustrating the internal signal transmission of the positioning fixture in an embodiment of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. Machining table; 11. Slide groove; 12. Mounting table; 2. Positioning table; 21. Spherical groove; 22. Chip discharge port; 23. Limiting groove; 3. Positioning seat; 31. Trapezoidal protrusion; 32. Positioning plate; 33. Rubber positioning block; 34. Connecting bracket; 4. First telescopic cylinder; 5. Second telescopic cylinder; 51. Rubber pad; 6. Infrared ranging sensor. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0034] Example

[0035] This application discloses an automatic positioning fixture for a hemispherical workpiece. (Refer to...) Figure 1 and Figure 2 The system includes a processing table 1, on which a positioning table 2 is fixedly installed. The positioning table 2 has a spherical groove 21 for placing a hemispherical workpiece, and a chip discharge port 22 is opened through the positioning table 2, which is located at the bottom of the spherical groove 21. Four positioning seats 3 are slidably installed on the processing table 1. The four positioning seats 3 are rotationally symmetrical about the positioning table 2, and rubber positioning blocks 33 for fixing the hemispherical workpiece are fixedly installed on the four positioning seats 3 respectively.

[0036] It also includes: a drive mechanism, fixedly mounted on the processing table 1, for driving the four positioning seats 3 to slide toward or away from the positioning table 2; a clamping control module, fixedly mounted on the processing table 1, for detecting the position of any positioning seat 3 and outputting a control signal when any positioning seat 3 moves to a set position; an end face positioning mechanism, fixedly mounted on the positioning seat 3 and connected to the signal output terminal of the clamping control module, for receiving the control signal and clamping and fixing the end face of the hemispherical workpiece; the signal output terminal of the clamping control module is connected to the signal input terminal of the drive mechanism, and the drive mechanism receives the control signal and stops driving.

[0037] During actual production and processing, the operator can place the spherical surface of the hemispherical workpiece in the spherical groove 21 and start the positioning fixture by pressing the start button on the processing table 1. The drive mechanism drives the four positioning seats 3 to move towards the processing table 1. When the four rubber positioning blocks 33 are pressed against the bottom of the hemispherical workpiece and the positioning seats 3 move to the set position, the clamping control module controls the drive mechanism to stop continuously driving the positioning seats 3 to slide. The end face positioning mechanism clamps and fixes the top end face of the hemispherical workpiece, which can achieve the technical effect of automatically clamping the side and top end faces of the hemispherical workpiece. Since the spherical surface of the hemispherical workpiece is embedded in the spherical groove 21, together with the end face positioning mechanism and the rubber positioning blocks 33, the hemispherical workpiece can be stably and quickly fixed, which can provide effective protection for subsequent CNC machining processes. Moreover, the waste generated during CNC machining can be discharged through the chip discharge port 22 at the bottom of the spherical groove 21. The operator can place a material trough for collecting waste under the positioning table 2 for easy collection of waste.

[0038] In this embodiment, trapezoidal protrusions 31 are fixedly installed on the bottom of the positioning base 3, and four slide grooves 11 adapted to the four trapezoidal protrusions 31 are provided on the processing table 1. The four trapezoidal protrusions 31 are respectively slidably disposed in the four slide grooves 11.

[0039] By using the trapezoidal protrusion 31 and the slide groove 11 on the processing table 1, the technical effect of sliding connection between the positioning seat 3 and the processing table 1 can be achieved. Furthermore, the trapezoidal protrusion 31, combined with the trapezoidal slide groove 11, can effectively reduce the occurrence of the positioning seat 3 falling out of the slide groove 11.

[0040] Reference Figure 1 Four positioning seats 3 are fixedly installed with positioning plates 32 on the side near the positioning platform 2. Four limiting grooves 23 are respectively opened on the positioning platform 2. The four limiting grooves 23 are coaxially arranged with the four sliding grooves 11. The four positioning plates 32 are slidably arranged in the four limiting grooves 23. Four rubber positioning blocks 33 are fixedly installed on the four positioning plates 32, and the side of the rubber positioning blocks 33 near the positioning platform 2 is rounded.

[0041] The rubber positioning block 33 can be used to clamp the side of the hemispherical workpiece; the upper limit groove 23 of the positioning platform 2 can reduce the occurrence of left and right offset of the positioning plate 32, and further improve the stability of clamping the hemispherical workpiece.

[0042] Reference Figure 1 The processing table 1 has four mounting platforms 12 fixedly installed. The drive mechanism includes four first telescopic cylinders 4. The cylinder bodies of the four first telescopic cylinders 4 are fixedly installed on the four mounting platforms 12 respectively. The cylinder shafts of the four first telescopic cylinders 4 are fixedly connected to the four positioning seats 3 respectively.

[0043] The technology allows four positioning seats 3 to move simultaneously toward or away from the positioning platform 2 by extending or retracting the cylinder shaft through the first telescopic cylinder 4.

[0044] Reference Figure 1 Each of the four positioning seats 3 is fixedly mounted with a connecting bracket 34. The end face positioning mechanism includes a second telescopic cylinder 5 fixedly mounted on each of the four connecting brackets 34. The cylinder shaft ends of the four second telescopic cylinders 5 are respectively fixedly mounted with rubber pads 51 for clamping the end face of the hemispherical workpiece.

[0045] When the four positioning seats 3 slide to the set position, the second telescopic cylinder 5 extends the cylinder shaft, so that the rubber pad 51 presses against the top end face of the hemispherical workpiece, thereby achieving the technical effect of clamping and positioning the top end face of the hemispherical workpiece.

[0046] Reference Figure 1 and Figure 2 The clamping control module includes: an infrared ranging sensor 6, which is fixedly installed on any mounting platform 12, for detecting the distance between itself and the positioning seat 3 and outputting a sensing distance signal; and a comparator chip, whose signal input terminal is connected to the signal output terminal of the infrared ranging sensor 6, for receiving the sensing distance signal and outputting a control signal when the sensing distance reaches a set value.

[0047] During the movement of the positioning seat 3, the infrared ranging sensor 6 detects the sensing distance between itself and the positioning seat 3 in real time. By working together with the comparator chip, it can detect the position of the positioning seat 3 and automatically control the positioning seat 3 to stop sliding when it reaches the set position. It can also drive the second telescopic cylinder 5 to clamp the top end face of the hemispherical workpiece, thus achieving the technical effects of automatic positioning and automatic clamping.

[0048] It should be noted that, in this embodiment of the application, the rubber positioning block 33 and the positioning pad are provided to prevent the positioning plate 32 and the cylinder shaft of the second telescopic cylinder 5 from directly contacting the surface of the hemispherical workpiece, which can effectively reduce the occurrence of damage to the surface of the hemispherical workpiece caused by the positioning fixture.

[0049] The implementation principle of the automatic positioning fixture for a hemispherical workpiece in this application embodiment is as follows: During the actual production and processing, the operator can place the spherical surface of the hemispherical workpiece in the spherical groove 21 and start the positioning fixture by pressing the start button on the processing table 1; the drive mechanism drives the four positioning seats 3 to move towards the processing table 1. When the four rubber positioning blocks 33 are pressed against the bottom of the hemispherical workpiece and the positioning seats 3 move to the set position, the clamping control module controls the drive mechanism to stop continuously driving the positioning seats 3 to slide. The end face positioning mechanism clamps and fixes the top end face of the hemispherical workpiece, which can achieve the technical effect of automatically clamping the side and top end face of the hemispherical workpiece. Since the spherical surface of the hemispherical workpiece is embedded in the spherical groove 21, combined with the end face positioning mechanism and the rubber positioning blocks 33, the hemispherical workpiece can be stably and quickly fixed, which can provide effective protection for subsequent CNC machining processes.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A semi-spherical workpiece automatic positioning tooling, characterized in that, Includes a processing table (1), on which a positioning table (2) is fixedly installed. The positioning table (2) has a spherical groove (21) for placing a hemispherical workpiece. A chip discharge port (22) is provided through the positioning table (2), and the chip discharge port (22) is located at the bottom of the spherical groove (21). Four positioning seats (3) are slidably installed on the processing table (1). The four positioning seats (3) are rotationally symmetrical about the positioning table (2). Rubber positioning blocks (33) for fixing hemispherical workpieces are fixedly installed on the four positioning seats (3). Also includes: The drive mechanism is fixedly installed on the processing table (1) and is used to drive the four positioning seats (3) to slide in the direction of approaching or moving away from the positioning table (2); The clamping control module is fixedly installed on the processing table (1) and is used to detect the position of any of the positioning seats (3) and output a control signal when any of the positioning seats (3) moves to the set position; The end face positioning mechanism is fixedly installed on the positioning seat (3) and is connected to the signal output terminal of the clamping control module. It is used to receive the control signal and clamp and fix the end face of the hemispherical workpiece. The signal output terminal of the clamping control module is connected to the signal input terminal of the drive mechanism, and the drive mechanism receives the control signal and stops driving.

2. The automatic positioning tooling for a hemispherical workpiece of claim 1, wherein, The bottom of each positioning seat (3) is fixedly installed with a trapezoidal protrusion (31), and the processing table (1) is provided with four sliding grooves (11) that are adapted to the four trapezoidal protrusions (31). The four trapezoidal protrusions (31) are respectively slidably arranged in the four sliding grooves (11).

3. The automatic positioning tool for a hemispherical workpiece according to claim 2, wherein Positioning plates (32) are fixedly installed on the side of the four positioning seats (3) near the positioning platform (2). The positioning platform (2) is provided with four limiting grooves (23). The four limiting grooves (23) are coaxially arranged with the four sliding grooves (11). The four positioning plates (32) are slidably arranged in the four limiting grooves (23). The four rubber positioning blocks (33) are respectively fixedly installed on the four positioning plates (32), and the side of the rubber positioning blocks (33) near the positioning platform (2) is rounded.

4. The automatic positioning tooling for a hemispherical workpiece of claim 3, wherein, Four mounting platforms (12) are fixedly installed on the processing table (1). The driving mechanism includes four first telescopic cylinders (4). The cylinder bodies of the four first telescopic cylinders (4) are fixedly installed on the four mounting platforms (12) respectively. The cylinder shafts of the four first telescopic cylinders (4) are fixedly connected to the four positioning seats (3) respectively.

5. The automatic positioning tool for a hemispherical workpiece according to claim 4, wherein A connecting bracket (34) is fixedly installed on each of the four positioning seats (3). The end face positioning mechanism includes a second telescopic cylinder (5) fixedly installed on each of the four connecting brackets (34). The cylinder shaft ends of the four second telescopic cylinders (5) are respectively fixedly installed with rubber pads (51) for clamping the end face of the hemispherical workpiece.

6. The automatic positioning tool for a hemispherical workpiece according to claim 5, wherein The clamping control module includes: An infrared distance sensor (6) is fixedly installed on any of the installation tables (12) and is used to detect the distance between the positioning seat (3) and output an inductive distance signal; A comparator chip is signal connected with the signal output end of the infrared distance sensor (6) and is used to receive the inductive distance signal and output the control signal when the inductive distance reaches a set value.

Images