Pre-pressing device and method of pressing of a pre-pressing device

Abstract

The application relates to the technical field of pressing mechanisms in the automobile part machining process, in particular to a pre-pressing device and a pressing method of the pre-pressing device. The pre-pressing device comprises a driving member, a sleeve, a first elastic member and a locking member. The first elastic member is arranged in the sleeve. The driving member is provided with a driving part and a top abutting part connected with the driving part. The top abutting part is arranged in the sleeve in a sliding mode and is connected with the first elastic member. A first workpiece is arranged at one end of the sleeve away from the driving member. The locking member penetrates through the sleeve and can abut against the top abutting part, so that the top abutting part continuously compresses the first elastic member. In the pre-pressing process, the locking member abutting against the top abutting part is pulled out, the sleeve and the driving member are no longer an integral structure, the first workpiece on the sleeve moves towards a second workpiece under the reset action of the compressed first elastic member, the first workpiece slowly contacts the second workpiece under the action of the first spring and under the condition that the gravity center is not deviated, and the integrity of the first workpiece is ensured.

Description

Technical Field

[0001] This application relates to the technical field of clamping mechanisms in the processing of automotive parts, and in particular to pre-clamping devices and clamping methods for pre-clamping devices. Background Technology

[0002] Currently, when machining inlet / outlet flange tooling, due to factors such as product center of gravity deviation and strict machining dimensional requirements, pre-tightening is required to ensure accurate initial positioning. However, the current pre-tightening structure requires manual tightening and loosening, which is time-consuming and inefficient. Furthermore, the tightening is done with springs or quick clamps, which may loosen or cause abnormalities during machining, leading to product scrapping or safety accidents.

[0003] Therefore, there is an urgent need for a pre-compression device and a compression method for the pre-compression device, which can, to some extent, solve the technical problems existing in the prior art. Summary of the Invention

[0004] The purpose of this application is to provide a pre-clamping device and a clamping method for the pre-clamping device, so as to solve to some extent the technical problem of workpiece scrapping caused by manually pre-clamping workpieces with a center of gravity offset in the prior art.

[0005] This application provides a pre-clamping device for contacting a first workpiece with a second workpiece, the pre-clamping device including a driving component, a sleeve, a first elastic element and a locking component;

[0006] The first elastic element is disposed on the sleeve; the driving member has a driving part and a top part connected to the driving part; the top part is slidably disposed on the sleeve and connected to the first elastic element.

[0007] The first workpiece is disposed at the end of the sleeve away from the driving member; the locking member passes through the sleeve and can abut against the top contact portion, so that the top contact portion continuously compresses the first elastic member;

[0008] When the locking member disengages from the top contact portion, the first elastic element resets, enabling the sleeve to drive the first workpiece to contact the second workpiece.

[0009] In the above technical solution, the driving component further includes a hydraulic cylinder that can serve as the driving part and a connecting rod that can serve as the top connection part;

[0010] One end of the connecting rod is connected to the oil cylinder, and the other end is slidably disposed in the sleeve and connected to the first elastic element.

[0011] The connecting rod has a limit hole on its side wall, and the sleeve has a through hole on its side wall, with the axis of the through hole perpendicular to the axis of the sleeve.

[0012] The locking member passes through the through hole and the limiting hole in sequence, which enables the connecting rod to compress the first elastic element inside the sleeve.

[0013] In the above technical solution, the locking component further includes a housing, a pin, and a second elastic element;

[0014] The housing is disposed on the sleeve and is in communication with the sleeve;

[0015] One end of the pin is disposed inside the housing and the other end extends out of the housing; a limiting ring is sleeved on the pin, and the second elastic element is sleeved on the pin, with one end connected to the limiting ring and the other end connected to the housing.

[0016] In the above technical solution, the shell and the sleeve are integrally formed.

[0017] In the above technical solution, both the first elastic element and the second elastic element are springs.

[0018] In the above technical solution, the locking member further includes a pin that can pass through the through hole and the limiting hole in sequence;

[0019] When the pin passes through the through hole and reaches the limiting hole, the connecting rod can compress the first elastic element inside the sleeve.

[0020] When the pin disengages from the limiting hole, the first elastic element resets and causes the sleeve to push the first workpiece against the second workpiece.

[0021] In the above technical solution, the locking component further includes a drive motor;

[0022] The drive motor is connected to the pin, and the drive motor can drive the pin to move along the axial extension direction of the pin so that the pin reaches or disengages from the limiting hole.

[0023] The above technical solution further includes a connector;

[0024] The connector is used to fix the first workpiece to the sleeve.

[0025] In the above technical solution, the driving component, the sleeve, and the locking component are all made of stainless steel.

[0026] This application also provides a clamping method for a pre-clamping device, comprising the following steps:

[0027] The first workpiece contacts the second workpiece: the pin is driven along the first direction to disengage from the connecting rod, the first elastic element is reset, and the sleeve and the housing move simultaneously along the second direction to make the first workpiece contact the second workpiece;

[0028] The first workpiece is pressed against the second workpiece with a first preset pressure: the oil cylinder drives the connecting rod to move along the second direction with the first preset pressure. At this time, the connecting rod moving along the second direction compresses the first elastic element, and the pin slides along the side wall of the connecting rod until the pin falls back into the limiting hole, so as to complete the pressing of the first workpiece against the second workpiece with the first preset pressure.

[0029] The first workpiece presses against the second workpiece with a second preset pressure: when the pin falls into the limiting hole again, the connecting rod continues to be driven along the second direction, and the connecting rod drives the first workpiece to press against the second workpiece with the second preset pressure through the sleeve.

[0030] Compared with the prior art, the beneficial effects of this application are as follows:

[0031] This application provides a pre-clamping device for clamping a first workpiece onto a second workpiece. The pre-clamping device includes a driving component, a sleeve, a first elastic element, and a locking component.

[0032] The first elastic element is disposed on the sleeve; the driving member has a driving part and a top part connected to the driving part; the top part is slidably disposed on the sleeve and connected to the first elastic element.

[0033] The first workpiece is disposed at the end of the sleeve away from the driving member; the locking member passes through the sleeve and can abut against the top contact portion, so that the top contact portion continuously compresses the first elastic member;

[0034] When the locking member disengages from the top contact portion, the first elastic element resets, enabling the sleeve to drive the first workpiece to contact the second workpiece.

[0035] Specifically, the actual pre-tightening process of the first workpiece is as follows: the locking member abutting against the top part is pulled out. At this time, the sleeve and the driving member are no longer an integral structure. Under the reset action of the compressed first elastic element, the first workpiece on the sleeve can be driven to move towards the second workpiece. Note that during the process of the first workpiece moving towards the second workpiece, the first workpiece is manually straightened to ensure that the center of gravity of the first workpiece is not off-center. This ensures that the first workpiece can slowly contact the second workpiece under the action of the first spring and while ensuring that the center of gravity does not shift, thus ensuring the integrity of the first workpiece.

[0036] This application also provides a clamping method for a pre-clamping device, comprising the following steps:

[0037] The first workpiece contacts the second workpiece: the pin is driven along the first direction to disengage from the connecting rod, the first elastic element is reset, and the sleeve and the housing move simultaneously along the second direction to make the first workpiece contact the second workpiece;

[0038] The first workpiece is pressed against the second workpiece with a first preset pressure: the oil cylinder drives the connecting rod to move along the second direction with the first preset pressure. At this time, the connecting rod moving along the second direction compresses the first elastic element, and the pin slides along the side wall of the connecting rod until the pin falls back into the limiting hole, so as to complete the pressing of the first workpiece against the second workpiece with the first preset pressure.

[0039] The first workpiece presses against the second workpiece with a second preset pressure: when the pin falls into the limiting hole again, the connecting rod continues to be driven along the second direction, and the connecting rod drives the first workpiece to press against the second workpiece with the second preset pressure through the sleeve.

[0040] Specifically, the above-mentioned clamping method is based on a pre-clamping device, and therefore has all the beneficial effects of a pre-clamping device, which will not be elaborated further here. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the overall structure of the pre-compression device provided in Embodiment 1 of this application;

[0043] Figure 2This is a schematic diagram of the sleeve in the pre-tightening device provided in Embodiment 1 of this application;

[0044] Figure 3 A cross-sectional view of the pre-compression device provided in Embodiment 1 of this application (the first elastic element is in a compressed state);

[0045] Figure 4 A cross-sectional view of the first elastic element in the pre-compression device provided in Embodiment 1 of this application in the reset state;

[0046] Figure 5 This is a cross-sectional view of the first elastic element in the pre-compression device provided in Embodiment 1 of this application, which is once again in a compressed state.

[0047] Figure label:

[0048] 1-First workpiece; 2-Second workpiece; 3-Driving component; 4-Sleeve; 5-First elastic element; 7-Oil cylinder; 8-Connecting rod; 9-Limiting hole; 10-Through hole; 11-Receiving cavity; 12-Housing shell; 13-Pin; 14-Second elastic element; 15-Limiting retaining ring; 16-Connecting component; 17-First direction; 18-Second direction. Detailed Implementation

[0049] The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0050] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0051] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0052] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0053] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, devices, areas, layers, or parts, these components, devices, areas, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, device, area, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, device, area, layer, or part referred to as the second component, device, area, layer, or part may also be referred to as the second component, device, area, layer, or part.

[0054] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0055] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0056] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0057] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0058] Example 1

[0059] In the workshop, when it is necessary to fix a first workpiece 1 with a center of gravity offset to a second workpiece 2, a manual fixing method is used. However, manual fixing often results in misalignment when fixing the first workpiece 1 to the second fixing component due to the center of gravity offset of the first workpiece 1 and the unbalanced and unstable force applied manually to the first workpiece 1. Ultimately, this leads to the scrapping of the first workpiece 1. In this embodiment, based on this problem, combined with... Figures 1-5 As shown, this application provides a pre-compression device that can accurately contact a first workpiece 1 with a second workpiece 2. Specifically, the pre-compression device includes a driving member 3, a sleeve 4, a first elastic element 5, and a locking member. The sleeve 4 has a receiving cavity 11, and the first elastic element 5 is disposed in the receiving cavity 11. The driving member 3 has a driving part and a top contact part connected to the driving part. The top contact part is slidably disposed on the sleeve 4 and connected to the first elastic element 5. The first workpiece 1 is disposed at the end of the sleeve 4 away from the driving member 3. The locking member passes through the sleeve 4 and can abut against the top contact part, so that the first elastic element 5 is in a compressed state within the receiving cavity 11.

[0060] Furthermore, when the locking member abuts against the top contact portion, it means that the sleeve 4 and the driving member 3 are connected into an integral structure by the locking member, and at this time the first elastic member 5 is sealed in the receiving cavity 11 of the sleeve 4 by the driving member 3 in a compressed form.

[0061] The actual pre-tightening process of the first workpiece 1 is as follows: the locking member that abuts against the top part is pulled out. At this time, the sleeve 4 and the driving member 3 are no longer an integral structure. Then, under the reset action of the compressed first elastic member 5, the first workpiece 1 on the sleeve 4 can be driven to move toward the second workpiece 2. Note that during the process of the first workpiece 1 moving toward the second workpiece 2, the first workpiece 1 is manually straightened to ensure that the center of gravity of the first workpiece 1 does not shift. This ensures that the first workpiece 1 can slowly contact the second workpiece 2 under the action of the first spring and while ensuring that the center of gravity does not shift, thus ensuring the integrity of the first workpiece 1.

[0062] In this embodiment, to ensure that the first workpiece 1 can still press tightly against the second workpiece 2 after contacting it, the driving component 3 specifically includes a hydraulic cylinder 7 that can serve as the driving part and a connecting rod 8 that can serve as the top contact part; one end of the connecting rod 8 is connected to the hydraulic cylinder 7, and the hydraulic cylinder 7 drives the connecting rod 8 to move; the other end of the connecting rod 8 is slidably disposed in the sleeve 4 and connected to the first elastic member 5; a limiting hole 9 is provided on the side wall of the connecting rod 8, and a through hole 10 is provided on the side wall of the sleeve 4, and the axis of the through hole 10 is perpendicular to the axis of the sleeve 4; when the locking component passes through the through hole 10 and the limiting hole 9 in sequence, the connecting rod 8 can compress the first elastic member 5 into the sleeve 4.

[0063] More specifically, when the first elastic element 5 is locked in the receiving cavity 11 by the locking member, and when the first workpiece 1 contacts the second workpiece 2, the hydraulic cylinder 7 is driven. The hydraulic cylinder 7 can drive the connecting rod 8, the sleeve 4 and the locking member to move simultaneously, so that the first workpiece 1 in contact with the second workpiece 2 can be pressed tightly against the second workpiece 2.

[0064] In this embodiment, the locking component includes a housing 12, a pin 13, and a second elastic member 14. The housing 12 has an installation channel, and the housing 12 is disposed on the sleeve 4, with the installation channel communicating with the through hole 10. Specifically, one end of the pin 13 is disposed inside the housing 12, and the other end extends out of the housing 12. A limiting ring 15 is sleeved on the pin 13, and the second elastic member 14 is sleeved on the pin 13, with one end connected to the limiting ring 15 and the other end connected to the housing 12.

[0065] In actual use, when the pin 13 passes through the through hole 10 and the limiting hole 9 in sequence and abuts against the connecting rod 8, the second elastic element 14 is in a state of free tension; when the pin 13 is pulled so that it no longer abuts against the connecting rod 8, the second elastic element 14 is in a state of compression under the action of the limiting retaining ring 15. Then, when the connecting rod 8 moves in the sleeve 4, the pin 13 passes through the through hole 10 and connects with the side wall of the connecting rod 8 (it is worth noting that at this time the pin 13 no longer abuts against the side wall of the connecting rod 8, and the connecting rod 8 and the pin 13 are in a state of sliding connection, that is, the pin 13 does not affect the sliding connection in the sleeve 4).

[0066] In addition, when the through hole 10 and the limiting hole 9 are connected again, the pin 13 will be driven by the reset action of the second elastic element 14 to pass through the through hole 10 and the limiting hole 9 in sequence, that is, the connecting rod 8 will once again compress the first elasticity in the sleeve 4.

[0067] Preferably, the housing 12 and the sleeve 4 are integrally formed to ensure that the sleeve 4 and the housing 12 can move simultaneously.

[0068] Preferably, both the first elastic element 5 and the second elastic element 14 are springs.

[0069] Preferably, in order to improve the service life of the driving component 3, the sleeve 4 and the locking component, the driving component 3, the sleeve 4 and the locking component are all made of stainless steel.

[0070] In this embodiment, the locking member further includes a drive motor; the drive motor is connected to the pin 13, and the drive motor can drive the pin 13 to move along the axial extension direction of the pin 13 so that the pin 13 reaches or disengages from the limiting hole 9.

[0071] Specifically, when the drive motor drives the pin 13 to move along the first direction 17 (the first direction 17 is described below and will not be elaborated on here), it is equivalent to pulling the pin 13 off the connecting rod 8. At this time, the connecting rod 8 and the sleeve 4 are in a sliding connection relationship and are no longer an integral structure. The first elastic element 5 will then return to its original position. When the drive motor drives the pin 13 to move in the opposite direction to the first direction 17, that is, when the pin 13 is inserted into the through hole 10 and the limiting hole 9 in sequence, the first spring can be sealed in the receiving cavity 11 in a compressed state.

[0072] In summary, using a drive motor to drive the pin 13 to move in the first direction 17 and in the opposite direction to the first direction 17 replaces the manual drive of the pin 13, making it safer, more automated, and more efficient.

[0073] In this embodiment, a connector 16 is also included; the connector 16 is used to fix the first workpiece 1 to the sleeve 4.

[0074] Preferably, the connector 16 is a bolt.

[0075] Example 2

[0076] This second embodiment is an improvement based on the above embodiments. The technical content disclosed in the above embodiments will not be described again, and the content disclosed in the above embodiments also belongs to the content disclosed in this second embodiment.

[0077] This embodiment discloses another structure for a locking member, specifically, the locking member includes a pin that can pass sequentially through the through hole and the limiting hole;

[0078] When the pin passes through the through hole and reaches the limiting hole, the connecting rod can compress the first elastic element inside the sleeve.

[0079] When the pin disengages from the limiting hole, the first elastic element resets and causes the sleeve to drive the first workpiece to contact the second workpiece.

[0080] In summary, the locking member in this embodiment has a simpler structure than the locking member disclosed in Embodiment 1, and requires manual operation to move the pin along the first direction and in the opposite direction.

[0081] Example 3

[0082] This third embodiment is an improvement based on the above embodiments. The technical content disclosed in the above embodiments will not be described again, and the content disclosed in the above embodiments also belongs to the content disclosed in this third embodiment.

[0083] This embodiment discloses a clamping method for a pre-clamping device, comprising the following steps:

[0084] Step 100: The first workpiece contacts the second workpiece: Drive the pin along the first direction (here, the first direction refers to the direction from the connecting rod to the pin) to disengage the pin from the connecting rod, the first elastic element resets, and the first elastic element drives the sleeve and the housing to move simultaneously along the second direction 18 (here, the second direction 18 refers to the direction from the driving member to the first workpiece) so that the first workpiece contacts the second workpiece.

[0085] Step 200: The first workpiece presses against the second workpiece with a first preset pressure: The oil cylinder drives the connecting rod to move along the second direction 18 with the first preset pressure. At this time, the connecting rod moving along the second direction 18 compresses the first elastic element, and the pin slides along the side wall of the connecting rod until the pin falls back into the limiting hole, so as to complete pressing the first workpiece against the second workpiece with the first preset pressure.

[0086] Step 300: The first workpiece presses against the second workpiece with a second preset pressure: When the pin falls into the limiting hole again, the connecting rod, sleeve and pin are an integral structure. When the connecting rod is driven along the second direction 18, the connecting rod drives the first workpiece to press against the second workpiece with the second preset pressure through the sleeve.

[0087] Step 400: When the operation of pressing the first workpiece into the second workpiece is completed, the connecting rod, sleeve and pin are still an integral structure. The hydraulic cylinder drives the connecting rod to move in the opposite direction to the second direction, so that the connecting rod sleeve and pin move in the opposite direction to the second direction at the same time, thereby realizing the separation of the first workpiece and the second workpiece. The first workpiece can be removed for the next operation.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A clamping method for a pre-clamping device, based on the pre-clamping device, the pre-clamping device being used to bring a first workpiece into contact with a second workpiece; the pre-clamping device comprising a driving member, a sleeve, a first elastic element, and a locking member; The first elastic element is disposed on the sleeve; the driving member has a driving part and a top part connected to the driving part; the top part is slidably disposed on the sleeve and connected to the first elastic element. The first workpiece is disposed at the end of the sleeve away from the driving member; the locking member passes through the sleeve and can abut against the top contact portion, so that the top contact portion continuously compresses the first elastic member; When the locking member disengages from the top contact portion, the first elastic element resets, enabling the sleeve to drive the first workpiece to contact the second workpiece. The driving component includes a hydraulic cylinder that can serve as the driving part and a connecting rod that can serve as the top connection part. One end of the connecting rod is connected to the oil cylinder, and the other end is slidably disposed in the sleeve and connected to the first elastic element. The connecting rod has a limit hole on its side wall, and the sleeve has a through hole on its side wall, with the axis of the through hole perpendicular to the axis of the sleeve. The locking member passes through the through hole and the limiting hole in sequence so that the connecting rod compresses the first elastic element into the sleeve; The locking component includes a housing, a pin, and a second elastic element; The housing is disposed on the sleeve and is in communication with the sleeve; One end of the pin is disposed inside the housing and the other end extends out of the housing; a limiting ring is sleeved on the pin, and the second elastic element is sleeved on the pin, with one end connected to the limiting ring and the other end connected to the housing; Both the first elastic element and the second elastic element are springs; Its features are, The clamping method of the pre-clamping device includes the following steps: The first workpiece contacts the second workpiece: the pin is driven along the first direction to disengage from the connecting rod, the first elastic element is reset, and the sleeve and the housing move simultaneously along the second direction to make the first workpiece contact the second workpiece; The first workpiece is pressed against the second workpiece with a first preset pressure: the oil cylinder drives the connecting rod to move along the second direction with the first preset pressure. At this time, the connecting rod moving along the second direction compresses the first elastic element, and the pin slides along the side wall of the connecting rod until the pin falls back into the limiting hole, so as to complete pressing the first workpiece against the second workpiece with the first preset pressure. The first workpiece presses against the second workpiece with a second preset pressure: when the pin falls into the limiting hole again, the connecting rod continues to be driven along the second direction, and the connecting rod drives the first workpiece to press against the second workpiece with the second preset pressure through the sleeve.

2. The clamping method of the pre-clamping device according to claim 1, characterized in that, The housing and the sleeve are integrally formed.

3. The clamping method of the pre-clamping device according to claim 2, characterized in that, The locking member includes a pin that can pass through the through hole and the limiting hole in sequence; When the pin passes through the through hole and reaches the limiting hole, the connecting rod can compress the first elastic element inside the sleeve. When the pin disengages from the limiting hole, the first elastic element resets and causes the sleeve to drive the first workpiece to contact the second workpiece.

4. The clamping method of the pre-clamping device according to claim 1 or 3, characterized in that, The locking component also includes a drive motor; The drive motor is connected to the pin, and the drive motor can drive the pin to move along the axial extension direction of the pin so that the pin reaches or disengages from the limiting hole.

5. The clamping method of the pre-clamping device according to claim 1, characterized in that, It also includes connectors; The connector is used to fix the first workpiece to the sleeve.

6. The clamping method of the pre-clamping device according to claim 1, characterized in that, The driving component, the sleeve, and the locking component are all made of stainless steel.

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