Cold knife weakening tool

Abstract

The utility model discloses a cold knife weakening frock relates to cutting processing technical field, cold knife weakening frock includes: frock base, at least two cutting platform, at least two cutting platform interval installation in frock base, every cutting platform all includes adsorption area, and the adsorption area is used to carry out adsorption to the skin of cutting, operation module, operation module installation in frock base, operation module is used to control every adsorption area to corresponding skin of cutting carries out selectively adsorption. The cold knife weakening frock of the utility model, by the integration of at least two cutting platform setting on frock base, can make the same cold knife weakening frock can realize the cutting processing of at least two skins of cutting simultaneously, need not every skin of cutting carries on cutting separately, is favorable to reduce the die change frequency, reduces die change operation and downtime waste, improves work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of cutting and processing technology, and in particular to a cold-blade weakening tool. Background Technology

[0002] Cold-blade weakening is a processing method that uses a blade to cut the slush-molded skin to locally thin the airbag cover at the deployment location. During the burst stress, the cut skin experiences stress concentration at the weakened location, causing the instrument panel cover to fracture at a predetermined position. To ensure uniform weakening thickness, a support fixture conforming to the product surface needs to be designed. In related technologies, cold-blade weakening fixtures are generally machined from a single piece of forged aluminum, resulting in significant weight, difficult handling and replacement, and each fixture can only be used for weakening the slush-molded skin of one vehicle model. Changing models requires mold changing, taking approximately 20 minutes per operation, leading to substantial time waste and room for improvement. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a cold-blade weakening tool, which can support and adhere to at least two surfaces to be cut, thereby improving the efficiency of the cutting process.

[0004] The cold-blade weakening tool according to an embodiment of the present invention includes: a tooling base; at least two cutting platforms, wherein the at least two cutting platforms are installed at intervals on the tooling base, and each cutting platform includes an adsorption area for adsorbing the skin to be cut; and an operation module installed on the tooling base, wherein the operation module is used to control each adsorption area to selectively adsorb the corresponding skin to be cut.

[0005] According to the embodiments of the present invention, the cold knife weakening tooling integrates at least two cutting platforms on the tooling base, enabling the same cold knife weakening tooling to simultaneously perform cutting of at least two surfaces to be cut, without requiring each surface to be cut to be cut individually. This helps to reduce the frequency of mold changes, reduce mold change operations and downtime waste, and improve work efficiency.

[0006] According to some embodiments of the present invention, each of the cutting platforms is connected to a support plate; The adsorption area is used to place and support the area to be cut of the epidermis to be cut, and the support plate is used to place and support the non-cutting area of ​​the epidermis to be cut.

[0007] According to some embodiments of the present invention, in the cold blade weakening tooling, the support plate is connected to the edge of the cutting platform and extends to the outside of the tooling base.

[0008] According to some embodiments of the present invention, the cold blade weakening tooling has two cutting platforms, which are spaced apart along the length of the tooling base, and the support plates corresponding to the two cutting platforms extend away from each other at both ends of the tooling base.

[0009] According to some embodiments of the present invention, the cold blade weakening tool is configured to be telescopic relative to the cutting platform, so that the length of the support plate extending relative to the cutting platform is adjustable.

[0010] According to some embodiments of the present invention, each of the cutting platforms is provided with a detection element, which is used to detect the skin to be cut on the adsorption area; The detection element is electrically connected to the operation module, and the operation module is configured to control the corresponding adsorption area to adsorb the epidermis to be cut when the detection element detects the epidermis to be cut.

[0011] According to some embodiments of the present invention, the cold knife weakening tool is constructed as a pressure sensor, which is disposed on the surface of the adsorption area. When the skin to be cut is placed in the adsorption area, the pressure sensor emits a detection signal.

[0012] According to some embodiments of the present invention, the cold knife weakening tool is provided with two cutting platforms, namely a first cutting platform and a second cutting platform, and the operation module includes a first operation switch, a second operation switch and a common operation switch; The first operating switch is used to control the adsorption area on the first cutting platform to selectively activate the adsorption function, the second operating switch is used to control the adsorption area on the second cutting platform to selectively activate the adsorption function, and the shared operating switch is used to control the first cutting platform and the second cutting platform to selectively activate the adsorption function simultaneously.

[0013] According to some embodiments of the present invention, the cold-blade weakening tool further includes a first cutting tool and a second cutting tool. The first operating switch is configured to control the first cutting tool to cut the skin to be cut on the first cutting platform according to a set trajectory when it is turned on. The second operating switch is configured to control the second cutting tool to cut the skin to be cut on the second cutting platform according to a set trajectory when it is turned on. The shared operating switch is configured to control the first cutting tool and the second cutting tool to cut simultaneously when it is turned on.

[0014] According to some embodiments of the present invention, the cold knife weakening tool is provided with the first operating switch, the second operating switch and the common operating switch being spaced apart and placed on the same side of the tooling base.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of the cold knife weakening tool according to an embodiment of this utility model; Figure label: Cold blade weak chemical fitting 100, Tooling base 1, first cutting platform 21, second cutting platform 22, adsorption area 23, pressure sensor 24, support plate 25, first operating switch 31, second operating switch 32, common operating switch 33, mode selection switch 34. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0018] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] The following is for reference. Figure 1 The present invention describes a cold knife weakening tool 100 according to an embodiment of the present invention. The cold knife weakening tool 100 can achieve adsorption cutting of at least two surfaces to be cut, reduce the frequency of mold changing, reduce mold changing operations and downtime waste, and improve work efficiency.

[0020] like Figure 1 As shown, the cold knife weakening tool 100 according to some embodiments of the present invention includes: tooling base 1, operation module and at least two cutting platforms.

[0021] The tooling base 1 serves as the bottom support for the cold blade weakening tooling 100, meaning that the operating module and at least two cutting platforms can be installed on the tooling base 1. In actual use, the tooling base 1 can be placed directly on the ground or installed on a workbench.

[0022] At least two cutting platforms are installed spaced apart on the fixture base 1, allowing the cutting platforms to be mounted above the fixture base 1. This provides bottom support for the cutting platforms, ensuring they are in a relatively stable state and preventing structural instability that could lead to damage during cutting, thus improving the reliability of the cutting process. Two, three, or more cutting platforms can be configured; in other words, two or more cutting platforms can be installed on the fixture base 1 to simultaneously cut the surface to be cut.

[0023] It should be noted that the cold knife weakening tool 100 is equipped with a cutting machine tool, which is equipped with cutting tools. The cutting tools are movable relative to the cutting platform, and the number of cutting tools can be set to be the same as the number of cutting platforms. For example, the cutting platform and the cutting tools can be set to two, three or more, so that multiple cutting tools can simultaneously cut the surface to be cut on the corresponding cutting platform.

[0024] Each cutting platform includes an adsorption area 23, which is used to adsorb the skin to be cut. The adsorption area 23 can be configured with a vacuum adsorption structure, so that after the skin to be cut is placed on the cutting platform, it can be actively adsorbed by the vacuum adsorption structure, thus stably fixing the skin to be cut on the cutting platform and ensuring that the skin to be cut remains in a stable state during the cutting process, guaranteeing the accuracy of the cutting process. Specifically, the vacuum adsorption structure may include a vacuum pump or other types of vacuum adsorption methods.

[0025] The operation module is installed on the tooling base 1. The operation module is used to control each adsorption area 23 to selectively adsorb the corresponding skin to be cut. That is, the adsorption function of each cutting platform can be actively controlled by the operation module. When the skin to be cut is placed on any cutting platform, the corresponding adsorption area 23 can be controlled by the operation module to actively adsorb the skin to be cut, so as to realize the centralized control of at least two cutting platforms.

[0026] According to the embodiment of the present utility model, the cold knife weakening tooling 100 integrates at least two cutting platforms on the tooling base 1, enabling the same cold knife weakening tooling 100 to simultaneously perform cutting of at least two surfaces to be cut, without the need for each surface to be cut to be cut individually. This helps to reduce the frequency of mold changes, reduce mold change operations and downtime waste, and improve work efficiency.

[0027] In some embodiments, each cutting platform is connected to a support plate 25. The adsorption area 23 is used to place and support the area to be cut of the skin to be cut, and the support plate 25 is used to place and support the non-cutting area of ​​the skin to be cut. That is, when the skin to be cut is placed on the cold knife weakening tool 100, the adsorption area 23 of the cutting platform and the support plate 25 can jointly support and fix the skin to be cut.

[0028] This allows the cutting platform to provide stable structural support for the surface to be cut, ensuring that the surface remains in a stable position during the cutting process, preventing it from shifting and improving cutting accuracy.

[0029] Furthermore, it should be noted that by setting the support plate 25, the overall actual support area of ​​the cutting platform can be increased without making the structural dimensions of the tooling base 1 very large. For example, two cutting platforms can be set, and the adsorption areas 23 of both cutting platforms can be located above the tooling base 1. The sum of the areas of the support plate 25 and the adsorption areas 23 can be set to be greater than the upper surface area of ​​the tooling base 1. Figure 1As shown, the adsorption areas 23 of the two cutting platforms can support the cutting areas of the two surfaces to be cut, while the non-cutting areas of the two surfaces to be cut can be supported above the support plate 25. In this way, the support area of ​​the tooling base 1 can be set to be smaller than the structural area of ​​the two surfaces to be cut, thereby reducing the structural size of the tooling base 1, reducing the structural weight of the cold knife weakening tooling 100, reducing the setup cost, and reducing the investment cost of a tooling.

[0030] In some embodiments, the support plate 25 is connected to the edge of the cutting platform and extends to the outside of the tooling base 1. That is, by setting the support plate 25, the surface to be cut is supported, but the support plate 25 is located in the outer area of ​​the tooling base 1, that is, the support plate 25 does not occupy the installation space on the tooling base 1. Thus, the structural dimensions of the tooling base 1 can be set to be smaller.

[0031] Furthermore, the support plate 25 can support the surface to be cut on the outside of the tooling base 1, so that the non-cutting area of ​​the surface to be cut does not occupy the space on the tooling base 1, which greatly utilizes the space outside the tooling base 1, which is conducive to improving the space utilization rate of the structure and reducing the footprint requirement of the tooling base 1.

[0032] In some embodiments, two cutting platforms are provided, spaced apart along the length of the tooling base 1, so as to maximize the utilization of the space above the tooling base 1. Specifically, as shown in the figure... Figure 1 As shown, the two cutting platforms can be constructed as rectangular blocks, and the tooling base 1 can be constructed as a rectangular base. The two cutting platforms are distributed along the length of the tooling base 1, which facilitates the compact installation of the two cutting platforms, realizes the miniaturized design of the tooling base 1, and reduces the installation cost.

[0033] The support plates 25 corresponding to the two cutting platforms extend away from each other at both ends of the fixture base 1, meaning the two support plates 25 can be symmetrically distributed relative to the central area of ​​the fixture base 1, and can be located at both ends of the fixture base 1. In this way, when the two surfaces to be cut are placed on the two cutting platforms, the non-cutting areas of both surfaces are positioned above both ends of the fixture base 1, thus ensuring a relatively balanced weight distribution at both ends of the fixture base 1. This prevents excessive load on one end during cutting operations, which could cause the fixture base 1 to shift, and improves structural stability.

[0034] In some embodiments, the support plate 25 is configured to be telescopic relative to the cutting platform so that the length of the support plate 25 extending relative to the cutting platform is adjustable. For example, the support plate 25 can be slidably mounted on the cutting platform so that the length of the support plate 25 extending relative to the cutting platform can be adjusted when sliding relative to the cutting platform, so that the support area of ​​the support plate 25 outside the cutting platform is adjustable.

[0035] In other words, when the support plate 25 supports the skin to be cut, the required support area varies depending on the size of the skin to be cut. At this time, the length of the support plate 25 extending relative to the cutting platform can be adjusted so that the support plate 25 can adapt to skins of different lengths to be cut and meet more support requirements.

[0036] A sliding groove can be provided on the side of the cutting platform, and the support plate 25 is slidably supported in the sliding groove so that the length of the support plate 25 can be flexibly adjusted.

[0037] In some embodiments, each cutting platform is provided with a detection element. The detection element is used to detect the skin to be cut on the adsorption area 23. The detection element can be used to determine whether the skin to be cut exists in the adsorption area 23. If there is no skin to be cut in the adsorption area 23, the detection element will not send a detection signal. However, if there is skin to be cut in the adsorption area 23, the detection element can detect the skin to be cut and send a detection signal.

[0038] The detection element is electrically connected to the operation module. The operation module is configured to control the corresponding adsorption area 23 to adsorb the skin to be cut when the detection element detects the skin to be cut. That is, when the detection element detects the presence of the skin to be cut, it sends a detection signal to the operation module. After receiving the detection signal, the control module analyzes and determines that the skin to be cut exists. At this time, it can control the vacuum adsorption structure in the adsorption area 23 to adsorb the skin to be cut, thereby fixing the skin to be cut.

[0039] In some embodiments, the detection element is configured as a pressure sensor 24, which is disposed on the surface of the adsorption region 23. The pressure sensor 24 emits a detection signal when the skin to be cut is placed in the adsorption region 23. That is, in actual installation, the pressure sensor 24 can be installed on the upper surface of the adsorption region 23, so that when the skin to be cut is supported above the adsorption region 23, the weight of the skin to be cut can directly act on the pressure sensor 24, thereby enabling the pressure sensor 24 to accurately detect the presence of the skin to be cut and ensuring the accuracy of the detection.

[0040] In actual installation, each cutting platform's adsorption area 23 can be equipped with at least one pressure sensor 24. That is, the number of pressure sensors 24 can be set to one, two, or more. When multiple pressure sensors 24 are set, they can be set at multiple positions in the circumferential direction of the adsorption area 23, thereby improving the detection accuracy.

[0041] In some embodiments, there are two cutting platforms, namely a first cutting platform 21 and a second cutting platform 22. The operation module includes a first operation switch 31, a second operation switch 32 and a common operation switch 33. In this way, the function of the adsorption area 23 on the first cutting platform 21 and the second cutting platform 22 can be selectively turned on by the first operation switch 31, the second operation switch 32 and the common operation switch 33.

[0042] Specifically, the first operating switch 31 is used to selectively activate the adsorption function of the adsorption area 23 on the first cutting platform 21, the second operating switch 32 is used to selectively activate the adsorption function of the adsorption area 23 on the second cutting platform 22, and the shared operating switch 33 is used to simultaneously and selectively activate the adsorption functions of both the first cutting platform 21 and the second cutting platform 22. In other words, when cutting the skin to be cut using a single first cutting platform 21, the vacuum adsorption function of the adsorption area 23 of the first cutting platform 21 can be activated individually using the first operating switch 31; when cutting the skin to be cut using a single second cutting platform 22, the vacuum adsorption function of the adsorption area 23 of the second cutting platform 22 can be activated individually using the second operating switch 32; and when cutting the skin to be cut using both the first cutting platform 21 and the second cutting platform 22, the adsorption functions of both cutting platforms can be activated simultaneously using the shared operating switch 33 to improve cutting efficiency.

[0043] In other words, when the Cold Knife Weak Chemical Fixture 100 is equipped with two cutting platforms, the two cutting platforms can flexibly choose to cut individually or simultaneously, thereby adapting to different cutting needs.

[0044] In some embodiments, the cold knife weakening tool 100 further includes a first cutting tool and a second cutting tool. The first operating switch 31 is configured to control the first cutting tool to cut the skin to be cut on the first cutting platform 21 with a set trajectory when it is turned on. The second operating switch 32 is configured to control the second cutting tool to cut the skin to be cut on the second cutting platform 22 with a set trajectory when it is turned on. The shared operating switch 33 is configured to control the first cutting tool and the second cutting tool to cut simultaneously when it is turned on, thereby realizing the active control of the two cutting tools.

[0045] In other words, the adsorption function of the first cutting tool can be linked with the adsorption function of the corresponding adsorption area 23 on the first cutting platform 21. That is, after the adsorption function of the corresponding adsorption area 23 on the first cutting platform 21 is activated, the control program of the first cutting tool is automatically activated and runs along a predetermined trajectory. Similarly, the adsorption function of the second cutting tool can be linked with the adsorption function of the corresponding adsorption area 23 on the second cutting platform 22. That is, after the adsorption function of the corresponding adsorption area 23 on the second cutting platform 22 is activated, the control program of the second cutting tool is automatically activated and runs along a predetermined trajectory.

[0046] Specifically, in actual operation, when the first cutting platform 21 is used alone for cutting, it first checks whether the adsorption area 23 of the first cutting platform 21 holds a workpiece. When it is detected that the adsorption area 23 of the first cutting platform 21 holds the skin to be cut, the vacuum adsorption function on the adsorption area 23 of the first cutting platform 21 is activated, and the control program of the first cutting tool is invoked to actively cut the skin to be cut. When the second cutting platform 22 is used alone for cutting, it first checks whether the adsorption area 23 of the second cutting platform 22 holds a workpiece. When it is detected that the adsorption area 23 of the second cutting platform 22 holds the skin to be cut, the control program of the second cutting platform 22 is activated. The vacuum adsorption function on the adsorption area 23 is activated, and the control program of the second cutting tool is invoked to actively cut the skin to be cut; and when the first cutting platform 21 and the second cutting platform 22 are used for cutting at the same time, it is first detected whether the adsorption area 23 of the first cutting platform 21 and the second cutting platform 22 has a part placed on it. When it is detected that the adsorption area 23 of the first cutting platform 21 and the second cutting platform 22 has a skin to be cut placed on it at the same time, the vacuum adsorption function on the adsorption area 23 of the first cutting platform 21 and the second cutting platform 22 is activated, and the control program of the first cutting tool and the second cutting tool is invoked to actively cut the skin to be cut.

[0047] This design allows for three control modes, flexibly adaptable to different cutting needs. One tooling unit enables dual-station production, reducing the number of tooling units by one and cutting investment in tooling for a single product; it also reduces the tooling storage space occupied by 1.5㎡; one tooling unit can produce two products, reducing mold change frequency and saving approximately 20 minutes per mold change operation; furthermore, a three-position knob allows switching between different product models, enabling three working modes and flexible production without mold changes, based on production needs. Additionally, when producing two products simultaneously, it reduces one machine door opening / closing operation time, increasing efficiency by approximately 10 seconds and improving overall production efficiency.

[0048] In some embodiments, the first operating switch 31, the second operating switch 32, and the common operating switch 33 are spaced apart and positioned on the same side of the tooling base 1, such as... Figure 1As shown, the first operating switch 31, the second operating switch 32, and the common operating switch 33 are all located on one side of the tooling base 1 in the width direction. In this way, the operator can operate the first operating switch 31, the second operating switch 32, and the common operating switch 33 from one side of the tooling base 1. The operation is convenient and does not require the operator to switch positions, so that the active operation of multiple operating switches can be realized.

[0049] Furthermore, a mode selection switch 34 can be installed on the tooling base 1 to switch the cold knife weakening tooling 100 to different working modes. The mode selection switch 34 can switch between the three modes in a fixed sequence. The mode selection switch 34 can be located on the same side of the tooling base 1 as the first operating switch 31, the second operating switch 32, and the common operating switch 33 for easy operation.

[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cold-blade weakening tool (100), characterized in that, include: Tooling base (1); At least two cutting platforms are installed at a distance from each other on the tooling base (1), and each cutting platform includes an adsorption area (23) for adsorbing the skin to be cut. An operation module is installed on the tooling base (1). The operation module is used to control each adsorption area (23) to selectively adsorb the corresponding epidermis to be cut.

2. The cold-blade weakening tool (100) according to claim 1, characterized in that, Each of the cutting platforms is connected to a support plate (25); The adsorption area (23) is used to place and support the area to be cut of the epidermis to be cut, and the support plate (25) is used to place and support the non-cutting area of ​​the epidermis to be cut.

3. The cold-blade weakening tool (100) according to claim 2, characterized in that, The support plate (25) is connected to the edge of the cutting platform and extends to the outside of the tooling base (1).

4. The cold-blade weakening tool (100) according to claim 2, characterized in that, The cutting platform is configured as two, and the two cutting platforms are distributed at intervals along the length direction of the tooling base (1), and the support plates (25) corresponding to the two cutting platforms extend away from each other at both ends of the tooling base (1).

5. The cold-blade weakening tool (100) according to claim 2, characterized in that, The support plate (25) is configured to be retractable relative to the cutting platform, so that the length of the support plate (25) extending relative to the cutting platform is adjustable.

6. The cold-blade weakening tool (100) according to claim 1, characterized in that, Each of the cutting platforms is equipped with a detection element, which is used to detect the epidermis to be cut on the adsorption area (23); The detection element is electrically connected to the operation module, and the operation module is configured to control the corresponding adsorption area (23) to adsorb the epidermis to be cut when the detection element detects the epidermis to be cut.

7. The cold-blade weakening tool (100) according to claim 6, characterized in that, The detection element is constructed as a pressure sensor (24), which is disposed on the surface of the adsorption area (23). The pressure sensor (24) emits a detection signal when the skin to be cut is placed in the adsorption area (23).

8. The cold-blade weakening tool (100) according to claim 1, characterized in that, The cutting platform is configured as two, namely a first cutting platform (21) and a second cutting platform (22), and the operation module includes a first operation switch (31), a second operation switch (32) and a common operation switch (33); The first operation switch (31) is used to control the adsorption area (23) on the first cutting platform (21) to selectively activate the adsorption function, the second operation switch (32) is used to control the adsorption area (23) on the second cutting platform (22) to selectively activate the adsorption function, and the shared operation switch (33) is used to control the first cutting platform (21) and the second cutting platform (22) to selectively activate the adsorption function simultaneously.

9. The cold-blade weakening tool (100) according to claim 8, characterized in that, It also includes a first cutting tool and a second cutting tool. The first operating switch (31) is configured to control the first cutting tool to cut the skin to be cut on the first cutting platform (21) with a set trajectory when it is turned on. The second operating switch (32) is configured to control the second cutting tool to cut the skin to be cut on the second cutting platform (22) with a set trajectory when it is turned on. The shared operating switch (33) is configured to control the first cutting tool and the second cutting tool to cut simultaneously when it is turned on.

10. The cold-blade weakening tool (100) according to claim 8, characterized in that, The first operating switch (31), the second operating switch (32) and the common operating switch (33) are spaced apart and placed on the same side of the tooling base (1).

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