Spark machine oil groove locking device and electric spark forming machine tool

Abstract

The utility model provides an electric spark machine oil groove locking device and an electric spark forming machine tool, which comprise pre-pressing mechanisms and a locking mechanism, at least one pair of pre-pressing mechanisms are respectively arranged on two sides of a matching part of an oil groove main body and a door main body, and each pre-pressing mechanism comprises a pre-pressing driving unit, a pre-pressing telescopic end, an oil groove drag hook and a door drag hook, the multiple locking mechanisms are arranged on the peripheral side of the matching portion of the oil groove body and the door body, and each locking mechanism comprises a locking driving unit, a rotating shaft and a pressing block. According to the scheme, the situation that the pressing block on the other side cannot enter the clamping groove due to the fact that one side of the door body tilts can be avoided, the elastic door sealing strip can be tightly and evenly attached to the oil groove body, the self-locking function is achieved after locking, high pressure can be borne, and compared with manual locking, mechanical driving locking and unlocking are time-saving and labor-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of electric spark forming processing machine tools, in particular to a spark machine oil tank locking device and an electric spark forming processing machine tool. Background Art

[0002] EDM is mainly used for discharge machining of various difficult-to-machine materials or difficult-to-machine cavity parts. This requires that the electrode or the workpiece can achieve multi-axis translation or rotation. In EDM, the working fluid plays an important role in EDM. It can provide cooling, cleaning and lubrication effects to ensure the stability and efficiency of the machining process. In EDM machine tools, the oil tank is used as a container for storing the working fluid. The oil tank of large spark machines currently uses a vertical lifting door mechanism, which is convenient for loading and unloading parts. The lifting door needs to have a sealing function and needs to seal the working fluid in the entire oil tank. The sealing principle is mainly to use multiple clamping mechanisms to make the seal placed on the door fit tightly and evenly with the main body of the oil tank.

[0003] The general locking mechanism of the oil tank currently on the market uses a single rotating locking mechanism for compression. In the process of implementing the utility model, the applicant found that the existing general locking mechanism has at least the following technical problems after long-term use:

[0004] 1. The adjustable clamping force mechanism is unreliable. After long-term use, the clamping force will change, which may cause oil leakage in the oil tank or the rotating mechanism to fail to rotate.

[0005] 2. After the door is closed, there is a layer of elastic door seal between the door and the oil tank. When one of the clamping mechanisms is locked, the door will be lifted up, making it impossible for the clamping block of the locking mechanism on the other side to enter the slot.

[0006] 3. Large oil tanks have multiple rotating mechanisms, which require manpower to lock, which is time-consuming and labor-intensive.

[0007] In view of this, how to solve the problems of unreliability and manual locking of existing general locking mechanisms has become the research content of this topic. Utility Model Content

[0008] The utility model provides a spark machine oil tank locking device and an electric spark forming processing machine tool.

[0009] To achieve the above-mentioned purpose, in the first aspect, the technical solution adopted by the utility model is: to propose a spark machine oil tank locking device, which is used for automatically locking and sealing the oil tank body and the door body in the spark machine oil tank. The door body is vertically lifted and installed on the oil tank body, and an elastic door seal is arranged between the door body and the oil tank body. The innovation point is that the spark machine oil tank locking device includes a pre-tensioning mechanism and a locking mechanism.

[0010] At least one pair of the pre-stressing mechanisms are arranged on both sides of the matching position of the oil tank body and the door body, and the pre-stressing mechanism includes a pre-stressing drive unit, a pre-stressing telescopic end, an oil tank hook, and a door hook. The pre-stressing drive unit is installed on the oil tank body, the oil tank hook is installed on the pre-stressing telescopic end, and the door hook is installed on the door hook. The oil tank hook and the door hook cooperate with each other.

[0011] Multiple locking mechanisms are arranged on the peripheral side of the matching position between the oil tank body and the door body, and the locking mechanism includes a locking drive unit, a rotating shaft, and a pressure block. The drive unit is installed on the oil tank body, and the pressure block is installed on the rotating shaft. The pressure block is provided with an inclined surface facing outward and a locking surface perpendicular to the axis of the rotating shaft, and the door body is provided with a slot that matches the pressure block.

[0012] The spark machine oil tank locking device is configured to have a pre-stressing state and a locking state; in the pre-stressing state, the pre-stressing driving unit drives the oil tank hook on the pre-stressing telescopic end to act on the door hook, so that the door body and the oil tank body are close to each other, and the slot passes over the inclined surface of the pressure block; in the locking state, the driving unit drives the pressure block on the rotating shaft to rotate, and the pressure block is rotated into the slot of the door body through the inclined surface and then locked with the slot by the locking surface.

[0013] To achieve the above-mentioned purpose, in a second aspect, the technical solution adopted by the present utility model is: an electrospark forming machine tool, wherein the electrospark forming machine tool uses the spark machine oil tank locking device described in the first aspect of the present utility model.

[0014] The relevant contents in the above technical solution are explained as follows:

[0015] 1. In the present utility model, in view of the problems that the universal locking mechanism of the oil tank of the EDM machine tool is unreliable and requires manual locking, a novel oil tank locking device for an EDM machine and an EDM forming machine are designed. The oil tank locking device for an EDM machine includes a pre-pressing mechanism and a locking mechanism, including a pre-pressing mechanism for pre-pressing and a locking mechanism for locking and realizing self-locking, and the corresponding oil tank locking device for an EDM machine is configured to have a pre-pressing state and a locking state; in the pre-pressing state, the oil tank hook on the pre-pressing telescopic end is driven by the pre-pressing driving unit to act on the door hook, so that the door body and the oil tank body are close to each other, and the slot is allowed to pass over the inclined surface of the pressure block, so as to ensure that the door body and the oil tank body are in close contact with each other. The elastic door seal of the groove body can be completely fitted, ensuring that the pressure block in the locking mechanism can smoothly enter the slot in the next state, and at least one pair of the pre-pressing mechanisms are arranged on both sides of the matching position of the oil groove body and the door body. This arrangement can prevent the door body from tilting on one side and causing the pressure block on the other side to be unable to enter the slot; in the locked state, the driving unit drives the pressure block on the rotating shaft to rotate, and the pressure block is rotated into the slot of the door body through the inclined surface, and then the locking surface is locked with the slot, so that the elastic door seal can be tightly and evenly fitted on the oil groove body, and the mechanism can realize the self-locking function, and the mechanism still maintains sufficient clamping force after the external driving force is cut off.

[0016] 2. In the above scheme, the preloading drive unit and the locking drive unit are both pneumatic drive structures, and the drive source is easy to obtain, simple and reliable; however, the utility model is not limited to this, and the drive source can also be hydraulic, electric, etc.

[0017] 3. In the above scheme, the number of the pre-compression mechanisms is one or two pairs, and one or two pairs of the pre-compression mechanisms are arranged flush at the matching position of the oil tank body and the door body. In this way, the pre-compression is realized reliably and stably to ensure balance. However, the utility model is not limited to this, and the number of the pre-compression mechanisms can also be three or four pairs.

[0018] 4. In the above technical solution, the number of the locking mechanisms is eight, two of which are arranged at the bottom of the matching part of the oil tank body and the door body, and six of which are arranged on the left and right sides of the matching part of the oil tank body and the door body. In this way, locking and self-locking can be achieved reliably and stably, but the utility model is not limited to this, and the number of the locking mechanisms can also be 5, 6, 7, 9, 10, etc.

[0019] 5. In the above technical solution, the locking mechanism also includes a rotating mechanism key, an adjustable locking flange, and a guide key. The locking drive unit is connected to the adjustable locking flange through the rotating mechanism key. The rotating shaft is fixed on the adjustable locking flange. The front and rear positions of the rotating shaft can be adjusted by adjusting the adjustable locking flange, thereby adjusting the relative positions of the pressing block and the slot. The pressing force of the pressing block in the locking mechanism is adjusted by this structure. When the pressing force is adjusted to a suitable position, the front and rear positions of the rotating shaft are locked by adjusting the screws on the locking flange.

[0020] 6. In this utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0021] 7. In the present utility model, the orientation or position relationship indicated by the terms "center", "upper", "lower", "axial", "bottom", "inner", "outer", etc. is based on the orientation or position assembly relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0022] 8. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0023] Due to the application of the above scheme, the utility model has the following advantages and effects compared with the prior art:

[0024] 1. In the above scheme of the utility model, in order to solve the problems that the universal locking mechanism of the oil tank of the electric spark machine tool is unreliable and requires manual locking, a new type of spark machine oil tank locking device and electric spark forming machine are designed. The spark machine oil tank locking device includes a pre-pressing mechanism and a locking mechanism, including a pre-pressing mechanism for pre-pressing and a locking mechanism for locking and achieving self-locking, and the corresponding spark machine oil tank locking device is configured to have a pre-pressing state and a locking state.

[0025] 2. In the above scheme of the utility model, in the pre-stressing state, the pre-stressing driving unit drives the oil tank hook on the pre-stressing telescopic end to act on the door hook, so that the door body and the oil tank body are close to each other, and the slot passes over the inclined surface of the pressure block, so as to ensure that the elastic door seal of the door body and the oil tank body can be completely fitted, and ensure that the pressure block in the locking mechanism can smoothly enter the slot in the next state, and at least one pair of the pre-stressing mechanisms are arranged on both sides of the matching position of the oil tank body and the door body. This arrangement can avoid the door body from tilting on one side and causing the pressure block on the other side to be unable to enter the slot.

[0026] 3. In the above scheme of the utility model, in the locked state, the driving unit drives the pressure block on the rotating shaft to rotate, and the pressure block is rotated into the slot of the door body through the inclined surface, and then the locking surface and the slot are locked and matched, so that the elastic door seal can fit tightly and evenly on the oil tank body, and has a self-locking function after locking, that is, the locking force can be maintained without external force after locking.

[0027] 4. In the above scheme of the utility model, it can be ensured that the elastic door seal is evenly compressed and sealed to fit on the oil tank body, can withstand higher pressure, and can seal 1M deep working fluid.

[0028] 5. In the above scheme of the utility model, mechanical drive is used for locking and releasing, and multiple locking mechanisms are arranged on the large oil tank door. Mechanical drive for locking and releasing saves time and effort compared with manual opening and locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front view of an embodiment of the utility model;

[0030] Figure 2 for Figure 1 DD section diagram in ;

[0031] Figure 3 A side view of an embodiment of the utility model;

[0032] Figure 4 This is a structural schematic diagram of the pre-pressing mechanism in the embodiment of the utility model;

[0033] Figure 5 It is a cross-sectional view of the locking mechanism in the embodiment of the utility model (direction one);

[0034] Figure 6 It is a cross-sectional view of the locking mechanism in the embodiment of the utility model (direction 2);

[0035] Figure 7 It is a schematic diagram of an initial state in which the pre-pressing mechanism and the locking mechanism in the embodiment of the utility model have not yet worked;

[0036] Figure 8 It is a schematic diagram of the pre-pressing state after the pre-pressing mechanism in the embodiment of the utility model starts to work;

[0037] Fig. 9 It is a schematic diagram of the locking state after the locking mechanism starts working in the embodiment of the utility model.

[0038] In the above attached figure:

[0039] 1 Pre-tensioning mechanism

[0040] 11 Preload drive unit

[0041] 12 Pre-loaded telescopic end

[0042] 13 Oil tank hook

[0043] 14 Door hook

[0044] 2 Locking mechanism

[0045] 21 Locking drive unit

[0046] 22 Shaft

[0047] 23 Briquetting

[0048] 231 bevel

[0049] 232 Locking surface

[0050] 24 Rotating mechanism key

[0051] 25 Adjustment locking flange

[0052] 26 Guide key

[0053] 27 Screws

[0054] 7 Oil tank body

[0055] 8 Door body

[0056] 81 Card slot

[0057] 9 Flexible door seal. DETAILED DESCRIPTION

[0058] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0059] The utility model aims to solve the problems of unreliability and manual locking of the universal locking mechanism 2 of the oil tank of the electric spark machine, and designs a novel spark machine oil tank locking device and an electric spark forming machine, which are used for automatic locking and sealing of the oil tank body 7 and the door body 8 in the oil tank of the spark machine. The spark machine oil tank locking device and the electric spark forming machine are time-saving and labor-saving to use, have reliable sealing, and can realize the self-locking function.

[0060] The following describes it in detail with reference to specific embodiments.

[0061] Example 1, reference Figure 1 , Figure 2 , Figure 3 As shown, the first embodiment of the utility model proposes a spark machine oil tank locking device, including a frame 2, a rotating worktable 1 and a rotating sealing assembly, which is used for automatic locking and sealing of the oil tank body 7 and the door body 8 in the spark machine oil tank. The door body 8 is vertically mounted on the oil tank body 7, and an elastic door seal 9 is arranged between the door body 8 and the oil tank body 7. The innovation point is that the spark machine oil tank locking device includes a pre-pressing mechanism 1 and a locking mechanism 2, at least one pair of the pre-pressing mechanisms 1 are arranged on both sides of the matching position of the oil tank body 7 and the door body 8, and a plurality of the locking mechanisms 2 are arranged on the surrounding side of the matching position of the oil tank body 7 and the door body 8.

[0062] refer to Figure 4 As shown, at least one pair of the pre-stressing mechanisms 1 are arranged on both sides of the matching position of the oil tank body 7 and the door body 8, and the pre-stressing mechanism 1 includes a pre-stressing drive unit 11, a pre-stressing telescopic end 12, an oil tank hook 13, and a door hook 14. The pre-stressing drive unit 11 is installed on the oil tank body 7, the oil tank hook 13 is installed on the pre-stressing telescopic end 12, and the door hook 14 is installed on the door hook 14. The oil tank hook 13 and the door hook 14 cooperate with each other.

[0063] refer to Figure 5 , Figure 6 As shown, a plurality of the locking mechanisms 2 are arranged on the peripheral side of the matching position of the oil tank body 7 and the door body 8, and the locking mechanism 2 includes a locking drive unit 21, a rotating shaft 22, and a pressure block 23. The drive unit is installed on the oil tank body 7, and the pressure block 23 is installed on the rotating shaft 22. The pressure block 23 is provided with an inclined surface 231 facing outward and a locking surface 232 perpendicular to the axis of the rotating shaft 22, and the door body 8 is provided with a slot 81 that matches the pressure block 23.

[0064] In the above-mentioned embodiment 1 of the present utility model, the spark machine oil tank locking device is configured to have a pre-stressing state and a locking state; in the pre-stressing state, the pre-stressing driving unit 11 drives the oil tank hook 13 on the pre-stressing telescopic end 12 to act on the door hook 14, so that the door body 8 and the oil tank body 7 are close to each other, and the slot 81 is allowed to pass over the inclined surface 231 of the pressure block 23; in the locking state, the driving unit drives the pressure block 23 on the rotating shaft 22 to rotate, and the pressure block 23 is rotated into the slot 81 of the door body 8 through the inclined surface 231, and then the locking surface 232 is locked with the slot 81.

[0065] The above solution of the first embodiment of the utility model can achieve the following functions:

[0066] 1. In the first embodiment of the present invention, the door body 8 is sealed and attached to the oil tank body 7 and can withstand a relatively high pressure. Through experiments, the device can seal a working fluid with a depth of 1 meter.

[0067] 2. In the first embodiment of the present invention, the locking mechanism 2 can realize a self-locking function. After the external air is cut off, the device still maintains sufficient clamping force.

[0068] 3. In the first embodiment of the utility model, the device can realize fully automatic locking, saving time and effort.

[0069] In another embodiment of the present invention, the preload drive unit 11 and the locking drive unit 21 are both pneumatic drive structures, and the drive source is easy to obtain, simple and reliable; however, the present invention is not limited to this, and the drive source can also be hydraulic, electric, etc.

[0070] In another embodiment of the utility model, the number of the pre-pressing mechanisms 1 is one or two pairs, and the one or two pairs of the pre-pressing mechanisms 1 are flushly arranged at the matching position of the oil tank body 7 and the door body 8. In this way, the pre-pressing is reliably and stably achieved to ensure balance. However, the utility model is not limited to this, and the number of the pre-pressing mechanisms 1 can also be three or four pairs.

[0071] In the embodiment of the utility model, the number of the locking mechanisms 2 is eight, two of which are arranged at the bottom of the matching part of the oil tank body 7 and the door body 8, and six of which are arranged on the left and right sides of the matching part of the oil tank body 7 and the door body 8. In this way, locking and self-locking can be achieved reliably and stably, but the utility model is not limited to this, and the number of the locking mechanisms 2 can also be 5, 6, 7, 9, 10, etc.

[0072] In the embodiment of the utility model, the locking mechanism 2 further includes a rotating mechanism key 24, an adjusting locking flange 25, and a guide key 26. The locking drive unit 21 is connected to the adjusting locking flange 25 through the rotating mechanism key 24. The rotating shaft 22 is fixed on the adjusting locking flange 25. The front and rear positions of the rotating shaft 22 can be adjusted by adjusting the adjusting locking flange 25, so as to adjust the relative positions of the pressing block 23 and the slot 81. The pressing force of the pressing block 23 in the locking mechanism 2 is adjusted by this structure. When the pressing force is adjusted to a suitable position, the front and rear positions of the rotating shaft 22 are locked by adjusting the screws 27 on the locking flange 25.

[0073] The solution of the utility model is described below with a specific detailed embodiment.

[0074] The spark machine oil tank locking device proposed in this detailed embodiment includes two pairs of pre-pressing mechanisms 1 and eight locking mechanisms 2. One pair of the pre-pressing mechanisms 1 is flushly arranged on the left and right sides of the matching position of the oil tank body 7 and the door body 8. Two of the locking mechanisms 2 are arranged at the bottom of the matching position of the oil tank body 7 and the door body 8. Six of the locking mechanisms 2 are respectively arranged on the left and right sides of the matching position of the oil tank body 7 and the door body 8. The pre-pressing mechanisms 1 and the locking mechanisms 2 are both pneumatic structures.

[0075] The pre-stressing mechanism 1 includes a pre-stressing driving unit 11, a pre-stressing telescopic end 12, an oil tank hook 13, and a door hook 14. The pre-stressing driving unit 11 is mounted on the oil tank body 7, the oil tank hook 13 is mounted on the pre-stressing telescopic end 12, and the door hook 14 is mounted on the door hook 14. The oil tank hook 13 and the door hook 14 cooperate with each other. The oil tank hook 13 and the door hook 14 have a mating surface facing inward and one facing outward that cooperates with each other, so that when the pre-stressing telescopic end 12 is extended and retracted, the oil tank hook 13 drives the door hook 14, so that the door body 8 can press the elastic door seal 9 synchronously and evenly in the process of approaching the oil tank body 7.

[0076] The locking mechanism 2 includes a locking drive unit 21, a rotating shaft 22, a pressure block 23, a rotating mechanism key 24, an adjusting locking flange 25, and a guide key 26. The driving unit is mounted on the oil tank body 7, the pressure block 23 is mounted on the rotating shaft 22, a guide key 26 is arranged on the rotating shaft 22, the pressure block 23 is provided with an inclined surface 231 facing outward and a locking surface 232 perpendicular to the axis of the rotating shaft 22, and the door body 8 is provided with a slot 81 that cooperates with the pressure block 23. The locking drive unit 21 is connected to the adjusting locking flange 25 through the rotating mechanism key 24, the rotating shaft 22 is fixed on the adjusting locking flange 25, and the front and rear positions of the rotating shaft 22 can be adjusted by adjusting the adjusting locking flange 25, so as to adjust the relative positions of the pressure block 23 and the slot 81. This structure is used to adjust the clamping force of the pressing block 23 in the locking mechanism 2. When the clamping force is adjusted to a suitable position, the front and rear positions of the rotating shaft 22 are locked by adjusting the screws 27 on the locking flange 25.

[0077] Next, combine Figure 7 , Figure 8 , Fig. 9 Each state and state change after adopting this detailed embodiment will be described.

[0078] Figure 7 A schematic diagram is shown in the initial state in which the pre-tensioning mechanism 1 and the locking mechanism 2 have not yet worked. In the initial state, the door body 8 is lowered to the sealing position of the oil tank body 7. Since an elastic door seal 9 is provided between the door body 8 and the oil tank body 7, the card slot 81 on the door body 8 is still located on the inner side of the pressure block 23 of the locking mechanism 2. At this time, the pressure block 23 cannot be screwed into the card slot 81.

[0079] Figure 8 A schematic diagram is shown of the pre-stressing state after the pre-stressing mechanism 1 starts working. In the pre-stressing state, the pre-stressing driving unit 11 drives the oil tank hook 13 on the pre-stressing telescopic end 12 to act on the door hook 14, so that the door body 8 and the oil tank body 7 are close to each other, the elastic door seals 9 on both sides are evenly compressed, and the action surfaces of the slot 81 and the pressure block 23 just pass over the inclined surface 231 of the pressure block 23, so that the pressure block 23 can have the conditions to enter the slot 81.

[0080] Fig. 9The schematic diagram shows the locking state after the locking mechanism 2 starts working. In the locked state, the driving unit drives the pressure block 23 on the rotating shaft 22 to rotate, and the pressure block 23 is screwed into the slot 81 of the door body 8 through the inclined surface 231, and then the locking surface 232 is locked with the slot 81. With the cooperation of multiple locking mechanisms 2, the elastic door seal 9 arranged on the door body 8 is tightly and evenly fitted with the oil tank body 7. After locking, sufficient locking force can still be maintained under the condition of no external force (external air is cut off).

[0081] Through the implementation of this detailed embodiment, the following structural features are possessed:

[0082] 1. The clamping force is adjustable to achieve uniform clamping between the door body 8 and the oil tank body 7.

[0083] 2. After locking, it has a self-locking function, that is, after locking, the locking force can be maintained without external force.

[0084] 3. Mechanically driven locking and loosening are adopted. Multiple locking mechanisms 2 are arranged on the large oil tank door. Mechanically driven locking and loosening saves time and effort compared with manual opening and locking.

[0085] Embodiment 2. Embodiment 2 of the present invention proposes an electrospark forming machine tool, which has an oil tank structure. The oil tank structure uses the spark machine oil tank locking device described in Embodiment 1. Its implementation method can refer to the relevant description of Embodiment 1 and the detailed embodiments, and will not be repeated here.

[0086] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A spark machine oil tank locking device, used for automatically locking and sealing an oil tank body (7) and a door body (8) in an oil tank of a spark machine, wherein the door body (8) is vertically mounted on the oil tank body (7), and an elastic door seal strip (9) is arranged between the door body (8) and the oil tank body (7), characterized in that: The spark machine oil tank locking device comprises a pre-pressing mechanism (1) and a locking mechanism (2); At least one pair of the pre-pressing mechanisms (1) are arranged on both sides of the matching position of the oil tank body (7) and the door body (8), and the pre-pressing mechanism (1) comprises a pre-pressing drive unit (11), a pre-pressing telescopic end (12), an oil tank hook (13), and a door hook (14); the pre-pressing drive unit (11) is mounted on the oil tank body (7), the oil tank hook (13) is mounted on the pre-pressing telescopic end (12), and the door hook (14) is mounted on the door hook (14); the oil tank hook (13) and the door hook (14) cooperate with each other; A plurality of locking mechanisms (2) are arranged on the peripheral side of the matching portion between the oil tank body (7) and the door body (8); the locking mechanism (2) comprises a locking drive unit (21), a rotating shaft (22), and a pressure block (23); the drive unit is mounted on the oil tank body (7); the pressure block (23) is mounted on the rotating shaft (22); the pressure block (23) is provided with an inclined surface (231) facing outward and a locking surface (232) perpendicular to the axis of the rotating shaft (22); and the door body (8) is provided with a slot (81) matching with the pressure block (23); The spark machine oil tank locking device is configured to have a pre-pressing state and a locking state; in the pre-pressing state, the pre-pressing drive unit (11) drives the oil tank hook (13) on the pre-pressing telescopic end (12) to act on the door hook (14), so that the door body (8) and the oil tank body (7) are close to each other, and the clamping groove (81) passes over the inclined surface (231) of the pressure block (23); in the locking state, the drive unit drives the pressure block (23) on the rotating shaft (22) to rotate, and the pressure block (23) is rotated into the clamping groove (81) of the door body (8) through the inclined surface (231), and then the locking surface (232) is locked with the clamping groove (81).

2. The spark machine oil tank locking device according to claim 1, characterized in that: The pre-pressing drive unit (11) and the locking drive unit (21) are both pneumatic drive structures.

3. The spark machine oil tank locking device according to claim 1, characterized in that: The number of the pre-pressing mechanisms (1) is one or two pairs, and the one or two pairs of pre-pressing mechanisms (1) are arranged flush at the matching position of the oil tank body (7) and the door body (8).

4. The spark machine oil tank locking device according to claim 1, characterized in that: The number of the locking mechanisms (2) is eight, two of which are arranged at the bottom of the matching position between the oil tank body (7) and the door body (8), and six of which are arranged on the left and right sides of the matching position between the oil tank body (7) and the door body (8).

5. The spark machine oil tank locking device according to claim 1, characterized in that: The locking mechanism (2) further comprises a rotating mechanism key (24) and an adjusting locking flange (25); the locking drive unit (21) is connected to the adjusting locking flange (25) via the rotating mechanism key (24); the rotating shaft (22) is fixed on the adjusting locking flange (25); and the front and rear positions of the rotating shaft (22) can be adjusted by adjusting the adjusting locking flange (25), thereby adjusting the relative positions of the pressing block (23) and the card slot (81).

6. An electrospark forming machine tool, characterized in that: The electric spark forming machine tool uses the spark machine oil tank locking device according to any one of claims 1 to 5.

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