Die machining device facilitating station switching and die machining method

Abstract

The mold machining device comprises an inner rotating disc and an outer rotating disc, a plurality of inner machining tables are arranged on the inner rotating disc, a plurality of outer machining tables are arranged on the outer rotating disc, and mechanical butt joint units capable of being in butt joint and interlocking are installed at the bottoms of the inner machining tables and the bottoms of the outer machining tables. A positioning ring is fixedly installed at the position, close to the outer rotating disc, of the inner rotating disc, and butt joint locking units are arranged at the positions, corresponding to the outer machining tables, of the outer rotating disc. The machining method further comprises the following steps that S1, the inner machining table and the outer machining table are independently machined; s2, the butt joint locking unit works; s3, the mechanical docking unit carries out secondary fine adjustment; s4, the stop wheel clamps the positioning ring again; s5, the position of the mold is adjusted; and S6, combined machining is conducted. Two modes of independent machining and combined machining are integrated, a system in which the sensor set, the butt joint locking unit and the mechanical butt joint unit work cooperatively is constructed, in the station switching process, accurate butt joint is achieved, and errors caused by separated positioning machining are eliminated.

Description

Technical Field

[0001] The present invention relates to the technical field of metal mold processing, and in particular to a mold processing device and a mold processing method which are convenient for switching workstations. Background Art

[0002] The surface of the mold that is directly used to shape the material is called the molding surface. In the actual working process of the mold, the molding surfaces of the upper mold and the lower mold must be closely matched. The matching accuracy has a profound impact on the performance of the mold. It is a key factor in determining the quality of the product and is directly related to the dimensional accuracy, surface finish and overall pass rate of the product.

[0003] The above-mentioned influence is particularly prominent when metal molds are used in processes such as sheet metal bending and hemming. At present, the industry generally adopts the traditional method of processing the upper mold and the lower mold separately. During the processing, it is difficult to achieve completely accurate and consistent clamping and positioning each time, and positioning errors are difficult to avoid. In addition, the accuracy of different processing equipment varies, and the degree of tool wear is also different. These factors are superimposed on each other, resulting in the upper mold and the lower mold being processed separately. When assembled, the size accuracy and shape accuracy of the two are difficult to achieve an ideal matching state.

[0004] This undesirable matching state has caused a series of serious problems in the use of metal molds for sheet metal bending and hemming. For example, wrinkles are very likely to appear on the product, which destroys the flatness of the sheet metal surface, greatly affecting the appearance quality of the product and reducing the beauty and texture of the product. At the same time, due to mold accuracy problems, the product may also have uneven edges. What is more serious is that the product may be partially thinned, and even microcracks caused by stress concentration may occur.

[0005] Based on the above situation, we are committed to designing an innovative mold processing device that is easy to switch workstations. This device has excellent flexibility. It can not only perform processing operations on the upper mold and the lower mold separately according to conventional needs; but also quickly switch workstations when necessary to achieve combined processing of the upper mold and the lower mold, fundamentally solving the problem of precision matching caused by separate processing, and greatly improving the quality and efficiency of metal mold manufacturing. Summary of the invention

[0006] The purpose of the present invention is to solve the problems raised in the background technology and to propose a mold processing device and a mold processing method that are convenient for switching workstations.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A mold processing device facilitating the switching of workstations, comprising: an inner turntable and an outer turntable, the inner turntable and the outer turntable are coaxially installed, a plurality of inner processing stations are arranged on the inner turntable, and a plurality of outer processing stations are correspondingly arranged on the outer turntable;

[0009] The inner processing station and the outer processing station are used to fix the upper mold and the lower mold by setting fixtures; a mechanical docking unit capable of docking and interlocking is installed at the bottom of the inner processing station and the outer processing station;

[0010] A positioning ring is fixedly installed at a position of the inner turntable close to the outer turntable, the positioning ring is concentric with the inner turntable, and a sensor group is arranged at a corresponding position of each inner processing station on the positioning ring;

[0011] A docking stop unit is arranged at a corresponding position of each outer processing station on the outer turntable. The docking stop unit includes a docking seat, a roller and a stop wheel. The docking seat is fixed on the outer turntable. The roller and the stop wheel are respectively located on both sides of the positioning ring, and the roller is in contact with the surface of the positioning ring. The stop wheel is used to clamp or loosen the positioning ring.

[0012] As a further scheme of the present invention: the mechanical docking unit includes an inner docking member and an outer docking member. The inner docking member is fixedly installed on the inner processing station, and the outer docking member is fixedly installed on the outer processing station;

[0013] An automatic telescopic rod is arranged on the inner docking member, and a plugging cylinder matched with the automatic telescopic rod is arranged on the outer docking member;

[0014] The telescopic end of the automatic telescopic rod is conical in shape, and the diameter gradually decreases towards the end close to the plugging cylinder. The inner diameter of the plugging cylinder matches the diameter of the telescopic end of the automatic telescopic rod.

[0015] As a further scheme of the present invention: the side of the positioning ring facing the inner processing station is the inner surface, which is provided with meshing teeth. The side of the positioning ring facing the outer processing station is the outer surface, which is set as a smooth arc surface;

[0016] The roller is in contact with the outer surface of the positioning ring. At the same time, the roller is rotatably installed on the first connecting member, and the first connecting member is fixedly connected with the docking seat;

[0017] The stop wheel is a gear, and its shape matches the meshing teeth on the inner surface of the positioning ring. The stop wheel is rotatably installed on the second connecting member. A T-shaped slider is arranged at the top of the second connecting member, and a T-shaped sliding groove matched with the T-shaped slider is arranged on the docking seat. The T-shaped slider is slidably installed in the T-shaped sliding groove.

[0018] As a further scheme of the present invention: the T-shaped slider and the T-shaped sliding groove are connected by a spring, and electromagnets are arranged at the spring connection positions of the T-shaped slider and the T-shaped sliding groove.

[0019] As a further solution of the present invention: the electromagnets on the T-shaped slider and the T-shaped chute attract each other magnetically after being energized, and the spring is a compression spring;

[0020] When the electromagnet is not energized, the spring is in its initial state. At this time, the stop wheel does not contact the positioning ring. After the electromagnet is energized, the spring is in a compressed state. At this time, the engaging teeth on the inner surface of the stop wheel and the positioning ring are engaged with each other.

[0021] As a further solution of the present invention: the sensor group includes a positioning sensor and several pre-stop sensors. The installation position of the positioning sensor corresponds to the position of the inner processing table, and several pre-stop sensors are symmetrically distributed on both sides of the positioning sensor.

[0022] As a further solution of the present invention: two pre-stop sensors are provided and symmetrically installed on both sides of the positioning sensor. Both the positioning sensor and the pre-stop sensors are pressure sensors.

[0023] As a further solution of the present invention, XY two-way adjustment sliding tables are provided on the upper parts of both the inner processing table and the outer processing table.

[0024] As a further solution of the present invention: the inner turntable is in the shape of a disc, the outer turntable is in the shape of a ring, and the outer turntable is located outside the inner turntable;

[0025] The inner turntable and the outer turntable are respectively driven by two groups of motors and rotate around their common central axis.

[0026] The bottoms of the inner turntable and the outer turntable are provided with bases. Different processing stations are arranged around the bases, and a milling machine, a drilling machine and a grinding machine are respectively installed.

[0027] A method for using a mold processing device convenient for switching stations, using the mold processing device convenient for switching stations as described above, includes the following steps:

[0028] S1: Both the docking stop unit and the mechanical docking unit are in their initial states. At this time, the stop wheel does not contact the positioning ring, the inner docking part is separated from the outer docking part, and the automatic telescopic rod is in the retracted state. In this state, the inner turntable and the outer turntable rotate respectively, and the molds on the inner processing table and the outer processing table rotate to different processing stations and are processed separately;

[0029] S2: When the molds on the inner processing table and the outer processing table need to be combined for processing, the outer turntable stops rotating, and the inner turntable decelerates and rotates slowly. When the pre-stop sensor on the positioning ring contacts the roller and detects pressure, the inner turntable decelerates again and rotates slowly at a predetermined rotational speed until the alignment sensor contacts the roller and detects pressure, then it stops rotating. At the same time, the stop wheel meshes with the positioning ring to achieve the effect of mechanically stopping the inner turntable. In this state, the inner processing table, the outer processing table, the alignment sensor, and the roller are aligned one by one;

[0030] S3: Release the positioning ring by the stop wheel, and then the automatic telescopic rod of the inner docking part extends and docks with the insertion cylinder on the outer docking part. The automatic telescopic rod has a guiding and correcting function, which can finely adjust the positions of the inner processing table and the outer processing table to accurately dock the inner processing table and the outer processing table;

[0031] S4: After the inner docking part and the outer docking part complete docking and interlocking, the stop wheel clamps the positioning ring again;

[0032] S5: According to the processing requirements, adjust the positions of the molds on the inner processing table and the outer processing table through the XY two-way adjustment slide table;

[0033] S6: The inner turntable and the outer turntable rotate synchronously to different processing stations for combined processing.

[0034] Compared with the existing technology, the advantages of the present invention are as follows:

[0035] 1: The mold processing device designed by the present invention breaks through the limitations of the traditional single processing mode, and has both independent processing and combined processing modes for the upper mold and the lower mold. In the independent processing mode, it can meet the conventional processing tasks; while in the combined processing mode, it can effectively avoid the clamping errors and processing errors caused by multiple clamping and different processing stages, complete the processing of the mating surface through one clamping, ensure the high-precision matching of the mating surfaces of the upper mold and the lower mold, greatly improve the service performance of the mold, and then improve the molding quality of the product and reduce the rejection rate caused by insufficient mold fitting accuracy.

[0036] 2: It constructs a system in which the sensor group, the docking stop unit and the mechanical docking unit work together. During the process of switching workstations, the sensor group monitors the rotational position of the inner turntable in real time. When the pre-stop sensor and the alignment sensor are triggered successively, it accurately controls the rotational speed and stop position of the inner turntable to initially align the inner processing table and the outer processing table. The docking stop unit responds quickly, and through the meshing of the stop wheel and the positioning ring, it realizes the mechanical locking of the inner turntable. Subsequently, the mechanical docking unit is activated. Its automatic telescopic rod, with a unique conical design, performs secondary fine adjustment to further finely adjust the positions of the inner processing table and the outer processing table to achieve their precise docking, effectively ensuring the position accuracy of the combined processing of the mold. Description of the Drawings

[0037] Figure 1 This is a schematic diagram of the overall structure when the inner processing table and the outer processing table of the present invention are in a combined state;

[0038] Figure 2 This is a schematic diagram of the overall structure when the inner processing table and the outer processing table of the present invention are in a separated state;

[0039] Figure 3 This is a schematic diagram of the installation structure of the inner processing table and the outer processing table of the present invention;

[0040] Figure 4 This is a schematic diagram of the installation structure of the inner processing table and the outer processing table of the present invention from another angle;

[0041] Figure 5 is Figure 4 a partial enlarged structure schematic diagram of part A in

[0042] Figure 6 This is a schematic diagram of the structure of the inner turntable of the present invention;

[0043] Figure 7 This is a schematic diagram of the structure of the outer turntable of the present invention;

[0044] Figure 8 This is a schematic diagram of the installation structure of the mechanical docking unit of the present invention;

[0045] Figure 9 This is a schematic diagram of the structure of the mechanical docking unit of the present invention;

[0046] Figure 10 This is a schematic diagram of the structure of the mechanical docking unit in another state of the present invention;

[0047] Figure 11 This is a schematic diagram of the installation structure of the docking stop unit and the positioning ring of the present invention;

[0048] Figure 12 This is a schematic diagram of the structure of the docking stop unit of the present invention;

[0049] Figure 13 is Figure 12 a partial enlarged structure schematic diagram of part B in

[0050] Figure 14 This is a front view structural schematic diagram of the docking stop unit of the present invention;

[0051] Figure 15 This is a schematic diagram of the structure of different processing stations of the present invention.

[0052] In the figure: 1. Inner turntable; 11. Inner processing table; 12. Positioning ring; 13. Sensor group; 131. Positive position sensor; 132. Pre-stop sensor; 2. Outer turntable; 21. Outer processing table; 3. Mechanical docking unit; 31. Inner docking part; 311. Automatic telescopic rod; 32. Outer docking part; 321. Insertion cylinder; 4. Docking stop unit; 41. Docking seat; 411. T-shaped chute; 412. Spring; 42. Roller; 421. First connecting piece; 43. Stop wheel; 431. Second connecting piece; 432. T-shaped slider; 5. XY two-way adjustment slide; 6. Base; 61. Milling machine; 62. Drilling machine; 63. Grinding machine. Detailed implementation mode

[0053] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0054] Refer to Figure 1-15 , a mold processing device convenient for switching workstations, including an inner turntable 1 and an outer turntable 2. The inner turntable 1 and the outer turntable 2 are installed on a base 6. Processing equipment such as a milling machine 61, a drilling machine 62, and a grinding machine 63 are arranged around the base 6, which are respectively used for processing operations such as milling, drilling, and grinding of the mold.

[0055] The inner turntable 1 and the outer turntable 2 are coaxially installed. The inner turntable 1 is in a disc shape, and the outer turntable 2 is in an annular shape and is located outside the inner turntable 1. They are respectively driven by two groups of motors and can rotate around their common central axis. A plurality of inner processing tables 11 are arranged on the inner turntable 1, and a plurality of outer processing tables 21 are correspondingly arranged on the outer turntable 2. Fixtures are arranged on the tops of the inner processing tables 11 and the outer processing tables 21 for fixing the upper mold and the lower mold (the fixtures are designed separately according to the shapes and characteristics of different molds). In order to adjust the position of the mold more accurately, XY two-way adjustment slides 5 are provided on the upper parts of the inner processing tables 11 and the outer processing tables 21. Operators can fine-tune the positions of the upper mold and the lower mold in the horizontal direction by adjusting the XY two-way adjustment slides 5 according to actual processing requirements, thereby improving the processing accuracy.

[0056] Refer to Figure 1-10, a mechanical docking unit 3 capable of docking and interlocking is installed at the bottom of the inner processing table 11 and the outer processing table 21; the mechanical docking unit 3 includes an inner docking member 31 and an outer docking member 32, the inner docking member 31 is fixedly installed on the inner processing table 11, and the outer docking member 32 is fixedly installed on the outer processing table 21; an automatic telescopic rod 311 is provided on the inner docking member 31, and a socket cylinder 321 cooperating with the automatic telescopic rod 311 is provided on the outer docking member 32.

[0057] The telescopic end of the automatic telescopic rod 311 is conical in shape, and the diameter gradually decreases towards the end close to the socket cylinder 321. The inner diameter of the socket cylinder 321 matches the diameter of the telescopic end of the automatic telescopic rod 311. During the combined processing of the molds, the automatic telescopic rod 311 extends and inserts into the socket cylinder 321, and the conical telescopic end is used to perform secondary fine adjustment on the positions of the inner processing table 11 and the outer processing table 21 to ensure accurate docking of the two.

[0058] Refer to Figure 1-14 , a positioning ring 12 is fixedly installed on the turntable 1 at a position close to the outer turntable 2. The positioning ring 12 is concentric with the inner turntable 1. The side of the positioning ring 12 facing the inner processing table 11 is the inner surface, which is provided with meshing teeth; the side facing the outer processing table 21 is the outer surface, which is set as a smooth arc surface; a sensor group 13 is provided at each position corresponding to the inner processing table 11 on the positioning ring 12. The sensor group 13 includes a positioning sensor 131 and two pre-stop sensors 132 symmetrically distributed on both sides of the positioning sensor 131 (multiple pre-stop sensors 132 can be set). The positioning sensor 131 and the pre-stop sensors 132 are both pressure sensors.

[0059] At each position corresponding to the outer processing table 21 on the outer turntable 2, a docking stop unit 4 is provided. The docking stop unit 4 includes a docking seat 41, a roller 42 and a stop wheel 43. The docking seat 41 is fixed on the outer turntable 2. The roller 42 is rotatably installed on the first connecting member 421. The first connecting member 421 is fixedly connected to the docking seat 41. The roller 42 is in contact with the outer surface of the positioning ring 12. During the rotation of the inner turntable 1 and the outer turntable 2, the roller 42 will always roll along the outer surface of the positioning ring 12. When the roller 42 rolls over the positioning sensor 131 and the pre-stop sensors 132, it will be detected by the positioning sensor 131 and the pre-stop sensors 132.

[0060] The stop wheel 43 is a gear, and its shape matches the meshing teeth on the inner surface of the positioning ring 12 (the cross-section of the positioning ring 12 is T-shaped, and the cross-sections of the roller 42 and the stop wheel 43 are I-shaped. They are installed in cooperation with the positioning ring 12 to prevent the roller 42 and the stop wheel 43 from moving up and down). The stop wheel 43 is rotatably installed on the second connecting member 431. A T-shaped slider 432 is provided at the top of the second connecting member 431. A T-shaped sliding groove 411 that cooperates with the T-shaped slider 432 is provided on the docking seat 41. The T-shaped slider 432 is slidably installed in the T-shaped sliding groove 411. The T-shaped slider 432 and the T-shaped sliding groove 411 are connected by a spring 412, and electromagnets are provided at the connection points of the spring 412 of the T-shaped slider 432 and the T-shaped sliding groove 411.

[0061] When the electromagnet is not powered on, the spring 412 is in its initial state, and the stop wheel 43 does not contact the positioning ring 12. After the electromagnet is powered on, the spring 412 is in a compressed state, and the meshing teeth on the inner surface of the stop wheel 43 and the positioning ring 12 are engaged with each other, realizing the mechanical locking of the inner turntable 1.

[0062] When the upper die and the lower die are processed separately in a conventional manner, the inner turntable 1 and the outer turntable 2 rotate independently. The operator fixes the upper die on the XY two-way adjustment slide 5 of the inner processing table 11, and fixes the lower die on the XY two-way adjustment slide 5 of the outer processing table 21. According to the processing requirements, the inner turntable 1 or the outer turntable 2 is driven to rotate, and the die is moved to the corresponding processing station. For example, for a die that needs to mill the outer shape, it is rotated to the corresponding station of the milling machine 61 for processing. For a die with a punching requirement, it is rotated to the corresponding station of the punching machine 62 for punching operations. During this process, the position of the die can be finely adjusted through the XY two-way adjustment slide 5 to ensure the processing accuracy (the XY two-way adjustment slide 5 is selected as an automatic adjustment slide or a manual adjustment slide according to the actual processing needs).

[0063] When the combined processing of the upper die and the lower die is required, the outer turntable 2 stops rotating, and the inner turntable 1 will rotate slowly. The pre-stop sensor 132 in the sensor group 13 starts to monitor the rotation position of the inner turntable 1 in real time. Since the roller 42 always rolls along the outer surface of the positioning ring 12 during the rotation of the inner turntable 1, when the roller 42 contacts the pre-stop sensor 132, the pre-stop sensor 132 is triggered, and the control system receives the signal, controls the inner turntable 1 to decelerate again, and rotates slowly at the set rotation speed (since the distance between the positive position sensor 131 and the pre-stop sensor 132 is designed, the rotation speed can be calculated, and within the set time, it can rotate from the position of the pre-stop sensor 132 to the position of the positive position sensor 131), and stops rotating when reaching the position of the positive position sensor 131. At this time, the inner processing table 11 and the outer processing table 21 are initially aligned;

[0064] To further ensure that the inner turntable 1 stops at the accurate docking position, the present application also provides a stop wheel 43 for mechanical clamping and stopping. Specifically, when the positive position sensor 131 is triggered, the docking stop unit 4 starts to work. The electromagnets on the T-shaped slider 432 and the T-shaped chute 411 are energized. The T-shaped slider 432 slides within the T-shaped chute 411, compressing the spring 412, driving the stop wheel 43 closer to the positioning ring 12. The engaging teeth on the inner surface of the stop wheel 43 and the positioning ring 12 are engaged with each other, achieving mechanical locking of the inner turntable 1, making it mechanically stop, and preventing it from rotating during subsequent operations.

[0065] Referring to Figure 4-14 , afterwards, the positions of the inner processing table 11 and the outer processing table 21 are finely adjusted for the second time. First, the stop wheel 43 is temporarily released from the positioning ring 12, and the mechanical docking unit 3 is started. The automatic telescopic rod 311 at the bottom of the inner processing table 11 extends. Since its telescopic end is conical, during the process of inserting into the insertion cylinder 321 at the bottom of the outer processing table 21, it can play a role in guiding and correcting, and will finely adjust the positions of the inner processing table 11 and the outer processing table 21 for the second time, further finely adjusting the positions of the two to ensure accurate docking of the inner processing table 11 and the outer processing table 21.

[0066] After docking is completed, the position of the mold is finely adjusted by the XY two-way adjustment slide table 5. It should be noted here that the functions of the mechanical docking unit 3 and the docking stop unit 4 are to accurately dock the positions of the inner processing table 11 and the outer processing table 21 (preventing angular deviation between the two positions), while the XY two-way adjustment slide table 5 is used to adjust the position of the mold after docking, eliminating the influence caused by the installation error of the mold. In addition, the XY two-way adjustment slide table 5 also has the function of preventing interference.

[0067] After the combined processing is completed, first retract the automatic telescopic rod 311 of the mechanical docking unit 3 to release the docking interlock state between the inner processing table 11 and the outer processing table 21. Then, the electromagnet of the docking stop unit 4 is powered off, the spring 412 returns to its initial state, the stop wheel 43 is separated from the positioning ring 12, and the inner turntable 1 is unlocked and can be switched back to the independent processing mode.

[0068] Further explanation, the above fixed connection, unless otherwise clearly specified and limited, should be understood in a broad sense. For example, it can be welding, gluing, or integrally formed setting, etc., which are common means well-known to those skilled in the art.

[0069] A method for using a mold processing device facilitating station switching, using the above mold processing device facilitating station switching, includes the following steps:

[0070] S1: Both the docking stop unit 4 and the mechanical docking unit 3 are in their initial states. At this time, the stop wheel 43 does not contact the positioning ring 12, the inner docking member 31 is separated from the outer docking member 32, and the automatic telescopic rod 311 is in the retracted state. In this state, the inner turntable 1 and the outer turntable 2 rotate respectively, and the molds on the inner processing table 11 and the outer processing table 21 rotate to different processing stations for separate processing;

[0071] S2: When the molds on the inner processing table 11 and the outer processing table 21 need to be combined for processing, the outer turntable 2 stops rotating, and the inner turntable 1 decelerates and rotates slowly. When the pre-stop sensor 132 on the positioning ring 12 contacts the roller 42 and detects pressure, the inner turntable 1 decelerates again and rotates slowly at a predetermined rotational speed until the alignment sensor 131 contacts the roller 42 and detects pressure, then it stops rotating. At the same time, the stop wheel 43 meshes with the positioning ring 12 to achieve the effect of mechanically stopping the rotation of the inner turntable 1. In this state, the inner processing table 11, the outer processing table 21, the alignment sensor 131, and the roller 42 are aligned one by one;

[0072] S3: Release the stop wheel 43 from the positioning ring 12, and then the automatic telescopic rod 311 of the inner docking member 31 extends and docks with the insertion cylinder 321 on the outer docking member 32. The automatic telescopic rod 311 has a guiding and correcting function and can finely adjust the positions of the inner processing table 11 and the outer processing table 21 to accurately dock the inner processing table 11 and the outer processing table 21;

[0073] S4: After the inner docking member 31 and the outer docking member 32 complete docking and interlocking, the stop wheel 43 clamps the positioning ring 12 again;

[0074] S5: Adjust the positions of the molds on the inner processing table 11 and the outer processing table 21 through the XY two-way adjustment slide table 5;

[0075] S6: The inner turntable 1 and the outer turntable 2 rotate synchronously to different processing stations for combined processing.

[0076] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A mold processing device that facilitates switching of workstations, comprising an inner turntable (1) and an outer turntable (2) that are coaxially arranged, characterized in that: The inner turntable (1) is provided with a plurality of inner processing tables (11), and the outer turntable (2) is correspondingly provided with a plurality of outer processing tables (21); The inner processing table (11) and the outer processing table (21) are used to fix the upper mold and the lower mold by arranging a clamp; a mechanical docking unit (3) capable of docking and interlocking is installed at the bottom of the inner processing table (11) and the outer processing table (21); The inner turntable (1) is fixedly mounted with a positioning ring (12) at a position close to the outer turntable (2); the positioning ring (12) is concentric with the inner turntable (1), and a sensor group (13) is arranged at a corresponding position of each inner processing table (11) on the positioning ring (12); The outer turntable (2) is provided with a docking stop unit (4) at a position corresponding to each outer processing table (21), the docking stop unit (4) comprising a docking seat (41), a roller (42) and a stop wheel (43), the docking seat (41) is fixed on the outer turntable (2), the roller (42) and the stop wheel (43) are respectively located on both sides of the positioning ring (12), and the roller (42) is in contact with the surface of the positioning ring (12), and the stop wheel (43) is used to clamp or release the positioning ring (12).

2. A mold processing device that is convenient for switching workstations according to claim 1, characterized in that: The mechanical docking unit (3) comprises an inner docking piece (31) and an outer docking piece (32), wherein the inner docking piece (31) is fixedly mounted on the inner processing table (11), and the outer docking piece (32) is fixedly mounted on the outer processing table (21); The inner docking piece (31) is provided with an automatic telescopic rod (311), and the outer docking piece (32) is provided with an inserting tube (321) that cooperates with the automatic telescopic rod (311); The telescopic end of the automatic telescopic rod (311) is in a conical shape, and its diameter gradually decreases towards an end close to the plug-in cylinder (321); the inner diameter of the plug-in cylinder (321) matches the diameter of the telescopic end of the automatic telescopic rod (311).

3. A mold processing device that is convenient for switching workstations according to claim 2, characterized in that: The side of the positioning ring (12) facing the inner processing table (11) is an inner surface, which is provided with meshing teeth, and the side of the positioning ring (12) facing the outer processing table (21) is an outer surface, which is provided with a smooth arc surface; The roller (42) is in contact with the outer surface of the positioning ring (12), and the roller (42) is rotatably mounted on the first connecting member (421), and the first connecting member (421) is fixedly connected to the docking seat (41); The stop wheel (43) is a gear whose shape matches the meshing teeth on the inner surface of the positioning ring (12). The stop wheel (43) is rotatably mounted on the second connecting member (431). A T-shaped slider (432) is provided on the top of the second connecting member (431). The docking seat (41) is provided with a T-shaped slide groove (411) that matches the T-shaped slider (432). The T-shaped slider (432) is slidably mounted in the T-shaped slide groove (411).

4. A mold processing device that is convenient for switching workstations according to claim 3, characterized in that: The T-shaped slider (432) and the T-shaped slide groove (411) are connected via a spring (412), and electromagnets are provided at the connection points between the T-shaped slider (432) and the spring (412) of the T-shaped slide groove (411).

5. A mold processing device that is convenient for switching workstations according to claim 4, characterized in that: The electromagnets on the T-shaped slide block (432) and the T-shaped slide groove (411) are magnetically attracted to each other after being energized, and the spring (412) is a compression spring; When the electromagnet is not energized, the spring (412) is in an initial state, at which time the stop wheel (43) is not in contact with the positioning ring (12); when the electromagnet is energized, the spring (412) is in a compressed state, at which time the stop wheel (43) and the meshing teeth on the inner surface of the positioning ring (12) are meshed with each other.

6. A mold processing device that facilitates switching of workstations according to claim 5, characterized in that: The sensor group (13) comprises a positive position sensor (131) and a plurality of pre-stop sensors (132); the installation position of the positive position sensor (131) corresponds to the position of the inner processing table (11); and the plurality of pre-stop sensors (132) are symmetrically distributed on both sides of the positive position sensor (131).

7. A mold processing device that facilitates switching of workstations according to claim 6, characterized in that: Two pre-stop sensors (132) are provided and symmetrically mounted on both sides of the positive position sensor (131); the positive position sensor (131) and the pre-stop sensor (132) are both pressure sensors.

8. A mold processing device that facilitates switching of workstations according to claim 7, characterized in that: An XY bidirectional adjustment slide (5) is provided on the upper parts of the inner processing table (11) and the outer processing table (21).

9. A mold processing device that facilitates switching of workstations according to claim 8, characterized in that: The inner turntable (1) is in the shape of a disk, the outer turntable (2) is in the shape of a ring, and the outer turntable (2) is located outside the inner turntable (1); The inner turntable (1) and the outer turntable (2) are driven by two sets of motors respectively, and rotate with their common central axis as the rotation center; A base (6) is provided at the bottom of the inner rotating disk (1) and the outer rotating disk (2), and different processing stations are arranged on the periphery of the base (6), and are respectively equipped with a milling machine (61), a punching machine (62) and a grinding machine (63).

10. A method for using a mold processing device that is convenient for switching workstations, using the mold processing device that is convenient for switching workstations as claimed in claim 9, characterized in that: The following steps are involved: S1: The docking stop unit (4) and the mechanical docking unit (3) are both in an initial state, at which the stop wheel (43) is not in contact with the positioning ring (12), the inner docking member (31) is separated from the outer docking member (32), and the automatic telescopic rod (311) is in a retracted state. In this state, the inner turntable (1) and the outer turntable (2) rotate separately, and the molds on the inner processing table (11) and the outer processing table (21) rotate to different processing stations for separate processing; S2: When the molds on the inner processing table (11) and the outer processing table (21) need to be combined for processing, the outer turntable (2) stops rotating, and the inner turntable (1) slows down and rotates slowly. When the pre-stop sensor (132) on the positioning ring (12) contacts the roller (42) and detects pressure, the inner turntable (1) slows down again and rotates slowly at the set rotation speed until the positive position sensor (131) contacts the roller (42) and stops rotating when pressure is detected. At the same time, the stop wheel (43) engages with the positioning ring (12) to achieve the effect of mechanically stopping the inner turntable (1). In this state, the positions of the inner processing table (11), the outer processing table (21), the positive position sensor (131), and the roller (42) are aligned one by one. S3: The stop wheel (43) releases the positioning ring (12), and then the automatic telescopic rod (311) of the inner docking member (31) extends and docks with the plug-in tube (321) on the outer docking member (32). The automatic telescopic rod (311) has a guiding and correcting function, and can fine-tune the positions of the inner processing table (11) and the outer processing table (21), so that the inner processing table (11) and the outer processing table (21) can be accurately docked; S4: After the inner docking member (31) and the outer docking member (32) are docked and interlocked, the stop wheel (43) clamps the positioning ring (12) again; S5: According to processing requirements, the positions of the molds on the inner processing table (11) and the outer processing table (21) are adjusted by using the XY bidirectional adjustment slide (5); S6: The inner turntable (1) and the outer turntable (2) are synchronously rotated to different processing stations for combined processing.

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