Tool magazine and numerical control gantry machining center

Abstract

The invention discloses a tool magazine and a numerical control gantry machining center, and relates to the field of numerical control gantry machining, the tool magazine comprises a magazine body, and a tool pouch for placing a plurality of tools is arranged in the magazine body. Through the arranged cutter bag, under the driving of the driving motor, the cutter bag is twisted into an approximately twisted structure, namely the twisted state, so that the internal space of the cutter bag is reduced, the liquid level of lubricating oil rises, the lubricating oil is soaked in the surface of a cutter, and the cutter is maintained. Afterwards, when the cutter bag is recovered from the twisting state to the natural state, the cutter does not make contact with the cutter bag, namely, the liquid level of the lubricating oil falls back to the position below the cutter, after standing is conducted for a period of time, the lubricating oil attached to the surface of the cutter drips downwards, attachment of the lubricating oil is reduced, it is avoided that much lubricating oil is attached to the surface of the cutter, and therefore loss of the lubricating oil is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of CNC gantry machining, in particular to a tool magazine and a CNC gantry machining center. Background Art

[0002] As is known, CNC gantry machining center is a large-scale, high-precision CNC machine tool, which is widely used in mechanical processing, mold manufacturing, aerospace and other fields. In the machining process, the movement of the machine tool is controlled by the numerical control system (CNC), the operator inputs the machining program into the CNC system, and the system controls the movement of each axis, the rotation and feed speed of the tool according to the program instructions to realize automated processing.

[0003] The patent application document with application number CN202410283719.4 and application date 2024-03-13 and titled "A Horizontal Gantry Machining Center" includes a main frame and also includes: a workbench located between the main frames, a gantry is provided on the main frame, a transverse driving mechanism is provided on the gantry, a transverse mounting frame is connected to the transverse driving mechanism, and the transverse mounting frame is slidably arranged on the gantry; the present invention can provide a tool detachment buffering effect for unused tools when replacing them through a buffer tool sleeve, and after the tool is in the buffer tool sleeve, a sealed space is formed in the oil storage chamber to isolate the tool head from the outside air, and when the tool is in the buffer tool sleeve, the oil storage chamber is vented to further improve the anti-oxidation effect on the tool head, and when the connecting plate descends, the second connecting tube is used to achieve the effect of exhausting air from the oil storage chamber again, and the effect of inflating the airbag ring is achieved.

[0004] In the prior art, when the tool of the machining center is maintained, the tool is generally placed in a tool holder storing lubricating oil for soaking to achieve the purpose of tool maintenance. However, each time the tool is used, the lubricating oil is brought out through surface adhesion. As the number of times the tool is soaked increases, the amount of lubricating oil in the tool holder is constantly consumed, resulting in serious waste. In addition, the brought out lubricating oil also drips onto the machining table, deteriorating the operating environment. Summary of the invention

[0005] The purpose of the present invention is to provide a tool magazine and a CNC gantry machining center to solve the above-mentioned problems in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A tool magazine comprises a magazine body, wherein a tool sheath for accommodating a plurality of tools is arranged inside the magazine body, and a tool bag for accommodating the tools is arranged inside each of the tool sheaths, and the bag opening of the tool bag is limited so that the tool bag is driven to have a natural state and a twisted state. In the natural state, the tool enters the tool bag and is located above the lubricating oil, and then the tool bag enters the twisted state from the natural state so that the lubricating oil rises and soaks the tool.

[0008] In the above-mentioned tool magazine, a driving motor is arranged at the bottom of the tool sleeve, and the output shaft of the driving motor passes through and extends into the interior of the tool sleeve and is connected to the bottom of the tool bag.

[0009] In the above-mentioned tool magazine, a metal sheet is provided at the bottom of the inner wall of the tool bag, and the metal sheet is used to protect the bottom of the tool bag.

[0010] In the above-mentioned tool magazine, the opening of the tool bag is fixedly connected to a support plate, the support plate runs across the top of the tool sleeve, and a central hole is opened on the support plate to fix the opening of the tool bag.

[0011] In the above tool magazine, when the tool enters the tool bag, it is located above the lubricating oil level, that is, the tool does not contact the lubricating oil.

[0012] In the above-mentioned tool magazine, a placement mechanism is provided on one side of the gantry, a driving unit is provided at the bottom of the magazine body, the driving unit includes a motor, a placement plate is rotatably connected inside the magazine body, and the output shaft of the motor passes through and extends to the interior of the magazine body and is connected to the placement plate.

[0013] In the above-mentioned tool magazine, a plurality of placement holes are opened inside the placement plate, and each placement hole is used to place the tool sleeve; two electric telescopic rods are arranged opposite to each other on both sides of the tool sleeve, and the telescopic ends of the electric telescopic rods abut against the end of the tool.

[0014] In the above-mentioned tool magazine, a V-shaped opening is provided on the top of the magazine body, and the placement hole and the V-shaped opening are in the same vertical direction.

[0015] A CNC gantry machining center comprises a gantry, a storage body is arranged on the gantry, and a processing table is arranged below the gantry. The processing table is used to place a workpiece so that a tool can process the workpiece placed on the processing table.

[0016] In the above-mentioned CNC gantry machining center, a plurality of supporting legs are arranged at the bottom of the machining table.

[0017] In the above technical scheme, the tool magazine and CNC gantry machining center provided by the present invention, through the tool bag, under the drive of the driving motor, the tool bag is twisted into a similar twisted structure, that is, a twisted state, so that the space inside the tool bag is reduced, the liquid level of the lubricating oil rises, and the lubricating oil is immersed in the surface of the tool to perform maintenance on the tool. Subsequently, when the tool bag is restored from the twisted state to the natural state, the tool is not in contact with the tool bag at this time, that is, the lubricating oil level falls back to the bottom of the tool. After standing for a period of time, the lubricating oil attached to the surface of the tool is dripped downward to reduce the attachment of the lubricating oil and avoid too much lubricating oil attached to the surface of the tool, thereby reducing the loss of lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the structure of a tool magazine and a CNC gantry machining center provided by an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of a top cross-sectional structure of a tool magazine and a magazine body in a CNC gantry machining center provided by an embodiment of the present invention;

[0021] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure of the middle knife sleeve;

[0022] Figure 4 A schematic structural diagram of another embodiment of a tool magazine and a CNC gantry machining center provided by an embodiment of the present invention;

[0023] Figure 5 for Figure 4 A schematic cross-sectional view of the middle knife bag;

[0024] Figure 6 for Figure 5 A local enlarged schematic diagram of point A in the middle.

[0025] Description of reference numerals:

[0026] 1. Gantry; 2. Tool sheath; 3. Tool bag; 4. Driving motor; 5. Metal sheet; 6. Overlap ring; 7. Storage body; 8. Motor; 9. Placement plate; 10. Placement hole; 11. Electric telescopic rod; 12. Processing table; 13. Support plate; 14. Through hole; 15. First protrusion; 16. First connecting rod; 17. Arc sheet; 18. Second connecting rod; 19. Second protrusion; 20. Limit groove; 21. Limit block. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0028] like Figure 1-6 As shown, this embodiment provides a tool magazine, including a magazine body 7, wherein a tool sheath 2 for placing a plurality of cutting tools is arranged inside the magazine body 7, and a tool bag 3 for placing the cutting tools is arranged inside each of the tool sheaths 2, and the tool bag 3 is used to carry lubricating oil, and the bag mouth of the tool bag 3 is limited so that the inside of the tool sheath 2, the tool bag 3 is driven to have a natural state and a twisted state, in the natural state, the cutting tool enters the tool bag 3 and is located above the lubricating oil, and then the tool bag 3 enters a twisted state from the natural state so that the lubricating oil rises to soak the cutting tool.

[0029] Specifically, the storage body 7 is cylindrical and hollow inside. A driving unit is arranged at the bottom of the storage body 7, and the driving unit includes a motor 8, which is connected to the gantry 1 through a bracket; a placement plate 9 is rotatably connected inside the storage body 7, and the output shaft of the motor 8 passes through and extends to the inside of the storage body 7 and is connected to the placement plate 9. A plurality of placement holes 10 are provided inside the placement plate 9, and each of the placement holes 10 is used to place the tool sleeve 2; a V-shaped opening is provided at the top of the storage body 7. When the placement hole 10 and the V-shaped opening are in the same vertical direction, the tool and the V-shaped opening are in the same vertical direction, so as to facilitate the taking and placing operation of the tool in the storage body 7; the tool sleeve 2 is vertically inserted into the placement hole 10, so as to limit the tool sleeve 2 as a whole. By starting the motor 8, the placement plate 9 inside the storage body 7 can be driven to rotate, and at the same time, the plurality of placement holes 10 on the placement plate 9 are aligned one by one with the V-shaped opening in the vertical direction. The above are all prior art and will not be described in detail.

[0030] In the embodiment of the present invention, it is inconvenient to take and place the knife shaft due to the small V-shaped opening. Further, in this embodiment, an electric telescopic rod 11 is relatively arranged on both sides of the knife sleeve 2, and the tops of the two electric telescopic rods 11 are commonly connected to a lap ring 6. The lap ring 6 is used to overlap the variable diameter part of the tool so that the tool can be suspended in the knife bag. At the same time, when placing the knife, the electric telescopic rod 11 is first used to drive the lap ring 6 to rise to the top of the storage body 7 to receive the tool, so as to avoid interference between the knife shaft and the storage body 7. Then, the lap ring 6 carries the tool and descends vertically into the knife sleeve. When taking the knife, on the contrary, the electric telescopic rod 11 drives the lap ring 6 to drive the tool to rise first, and then the knife shaft performs the knife taking operation.

[0031] Another innovation of the present embodiment is that a knife bag 3 for placing a cutting tool is provided inside each of the knife sheaths 2, and the bag opening of the knife bag 3 is limited so that the inside of the knife sheath 2, the knife bag 3 is driven to have a natural state and a twisted state. In the natural state, the cutting tool enters the knife bag 3 and is located above the lubricating oil, and then the knife bag 3 enters a twisted state from the natural state so that the lubricating oil rises and soaks the cutting tool.

[0032] Specifically, a driving motor 4 is provided at the bottom of the knife sheath 2, and the output shaft of the driving motor 4 passes through and extends to the interior of the knife sheath 2 and is connected to the bottom of the knife bag 3. A metal sheet 5 is provided at the bottom of the inner wall of the knife bag 3, and the metal sheet 5 is used to protect the bottom of the knife bag 3 to reduce the probability of the blade of the knife cutting the knife bag 3. The opening of the knife bag is fixed to a support plate 13, and the support plate 13 runs across the top of the knife sheath 2. The support plate 13 has a central hole for fixing the opening of the knife bag 3.

[0033] In this embodiment, the top of the knife bag 3 is open, the middle part is approximately cylindrical, and the lower part is approximately elliptical. Since a certain amount of lubricating oil is contained in the lower part, the bottom of the knife bag 3 is approximately elliptical under the action of gravity. When the tool enters the knife bag 3, it is located above the level of the lubricating oil, that is, the tool does not contact the lubricating oil. Figure 3 As shown, this state is also the natural state of the knife bag 3;

[0034] When the tool is to be maintained, the drive motor 4 is started, so that the output shaft of the drive motor 4 drives the tool bag 3 to twist. Since the support plate 13 is provided to limit and fix the opening of the tool bag 3, when the tool bag 3 is twisted, the bag opening does not twist, and the middle inner wall of the tool bag 3 gradually approaches and fits the surface of the tool, and is twisted around the surface of the tool in a twisted shape. At this time, due to the twisting of the tool bag 3, the space inside the tool bag 3 is reduced, so that the lubricating oil inside the tool bag 3 is squeezed due to the overall deformation of the tool bag 3, causing the liquid level to rise, so that the lubricating oil inside the tool bag 3 covers and soaks the surface of the tool, so as to maintain the tool;

[0035] The purpose of the metal sheet 5 is to support the bottom of the knife bag 3, so that the output shaft of the driving motor 4 drives the knife bag 3 to twist, thereby maintaining the knife. At the same time, by arranging the metal sheet 5 at the bottom of the knife bag 3, the bottom of the knife bag 3 can be protected to prevent the blade of the knife from accidentally contacting the bottom of the knife bag 3, thereby causing damage to the knife bag 3.

[0036] In the above description, when the knife bag 3 is in a natural state, that is, the tool is not immersed in the lubricating oil, that is, the tool is above the lubricating oil; when the knife bag 3 is in a twisted state, that is, the drive motor 4 is driven to drive the knife bag 3 to twist, so as to perform maintenance operations on the tool in the knife bag 3.

[0037] Specifically, when the used tool is to be maintained, the motor 8 is first started to drive the placement plate 9 to rotate, and the tool sleeve 2 without the tool placed is vertically aligned with the V-shaped opening of the storage body 7, so that the tool installed on the tool shaft falls into the tool sleeve 2 and enters the interior of the tool bag 3, wherein the connecting end of the tool abuts the opening of the tool sleeve 2, so that the tool is inserted into the tool bag 3 so as to be above the liquid level of the lubricating oil, and then the driving motor 4 is started to drive the tool bag 3 to twist, and its inner wall gradually approaches and fits the surface of the tool, and is twisted around the surface of the tool in a twisted shape. At this time, due to the twisting of the tool bag 3, the space inside the tool bag 3 is reduced, so that the lubricating oil inside the tool bag 3 is squeezed due to the overall deformation of the tool bag 3, causing the liquid level to rise, so that the lubricating oil inside the tool bag 3 covers and soaks the surface of the tool, so as to perform maintenance on the tool;

[0038] When the maintenance is completed, the tool is used for a predetermined time, such as five minutes, by first starting the drive motor 4 to drive the tool bag 3 to reversely twist, that is, the tool bag 3 is restored from a twisted state to a natural state. At this time, the lubricating oil remaining on the tool is soaked and drips under the action of gravity. At the same time, the lubricating oil adhered to the inner wall of the tool bag 3 also flows downward and is concentrated at the bottom of the tool bag 3. After standing for a predetermined time to reduce the lubricating oil adhered to the surface of the tool, the electric telescopic rod 11 is started to push the tool to move upward and is installed and connected to the tool shaft.

[0039] The beneficial effect of this embodiment is that, by means of the knife bag 3, the knife bag 3 is twisted into a similar twisted structure under the drive of the driving motor 4, that is, in a twisted state, so that the space inside the knife bag 3 is reduced, the lubricating oil is squeezed, the liquid level of the lubricating oil rises, and the lubricating oil is soaked in the surface of the tool to perform maintenance on the tool. Subsequently, when the knife bag 3 is restored from the twisted state to the natural state, the tool does not contact the knife bag 3, that is, the lubricating oil liquid level falls back to below the tool, and after standing for a period of time, the lubricating oil attached to the surface of the tool drips downward to reduce the attachment of the lubricating oil and avoid too much lubricating oil attached to the surface of the tool, thereby reducing the loss of the lubricating oil.

[0040] A CNC gantry machining center, comprising a gantry 1, a storage body 7 is arranged on the gantry 1, and a processing table 12 is arranged below the gantry 1, the processing table 12 is used to place the workpiece, so that the tool can process the workpiece placed on the processing table 12. A plurality of supporting legs are arranged at the bottom of the processing table 12.

[0041] Specifically, the gantry 1 is a main structure and is arranged vertically, and a driving mechanism is arranged on the gantry 1. The driving mechanism is provided with a tool shaft for fixing the tool, and a corresponding locking mechanism (not shown) is arranged inside the tool shaft. When changing the tool, after the top of the tool is inserted into the tool shaft, the tool is locked and limited by the provided locking mechanism, so that the tool is installed on the tool shaft for corresponding processing. When the tool processes the workpiece, the driving mechanism is used to drive the tool to move its position on the gantry 1, thereby realizing the processing operation on the workpiece. It should be noted that the working direction of the tool is driven by the driving mechanism to realize movement in three-dimensional space. A processing table 12 is arranged below the gantry 1, and the processing table 12 is used to place the workpiece so that the tool can process the workpiece placed on the processing table 12. A plurality of supporting legs are arranged at the bottom of the processing table 12, and the plurality of supporting legs are fixed on a fixed foundation such as the ground;

[0042] When the driving mechanism is working, the driving mechanism drives the tool on the tool shaft to align with the tool sleeve 2 in the vertical direction, and enables the tool to smoothly fall into the tool sleeve 2 for placement; when the tool falls into the tool sleeve 2, since the diameter of the connection end between some tools and the tool shaft is larger, the connection end of the tool is abutted against the opening of the tool sleeve 2, so that after the tool enters the tool sleeve 2, the tool is supported by the opening of the tool sleeve 2, and the blade part of the tool is suspended in the tool sleeve 2, so as to soak the tool and perform maintenance on the tool. When taking the tool, the tool is removed from the tool sleeve 2 and locked with the tool shaft. The above is the prior art of the CNC gantry machining center and will not be repeated.

[0043] For further information, see Figure 4-Figure 6As shown, since the lubricating oil is relatively viscous, its fluidity is relatively poor. Thus, after the tool has been left to stand for a period of time, a certain amount of lubricating oil still remains on its surface. Thus, this embodiment provides a cleaning structure, wherein a through hole 14 is provided on each of the opposite sides of the tool sleeve 2, a first protrusion 15 is fixedly connected to the telescopic end of the electric telescopic rod 11, a protrusion is provided on the lower surface of the support plate 13, a hole is provided on the protrusion to be slidably connected to a first connecting rod 16, one end of the first connecting rod 16 is connected to an arc-shaped piece 17, the arc-shaped piece 17 abuts against the outer wall of the tool pocket 3, and the other end of the first connecting rod 16 is rotatably connected to a second connecting rod 18 via a rotating shaft, and the second connecting rod 18 passes through the through hole 1 4 and extends to the outside of the knife sheath 2, the first connecting rod 16, the arc-shaped piece 17, and the second connecting rod 18 are each provided with two sets to correspond to the two electric telescopic rods 11 one by one, one end of the second connecting rod 18 extending to the outside of the knife sheath 2 is rotatably connected to a second protrusion 19 through another rotating shaft, a limiting groove 20 is provided inside the through hole 14, the rotating shaft on the second protrusion 19 is slidably connected to the inside of the limiting groove 20, and a limiting block 21 is provided inside the limiting groove 20, and the limiting block 21 is used to limit the second protrusion 19.

[0044] Specifically, a vertical surface is provided on opposite sides of the rotating shaft on the second protrusion 19, and the vertical surface is slidably connected to the inside of the limiting groove 20, so that the second protrusion 19 always maintains a horizontal state and slides inside the limiting groove 20 so as to perform wedge-shaped cooperation with the first protrusion 15; the first protrusion 15 is provided with a first inclined surface and a second inclined surface relatively, and the first inclined surface is arranged above the second inclined surface, and the second protrusion 19 is provided with a third inclined surface and a fourth inclined surface relatively, and the third inclined surface is arranged above the fourth inclined surface, and the first inclined surface is adapted to the fourth inclined surface, and the second inclined surface is adapted to the third inclined surface, and the materials of the first protrusion 15 and the limiting block 21 are both rubber materials, so that when the tool maintenance is completed, by starting the electric telescopic rod 11, the first inclined surface on the first protrusion 15 is driven to move toward the second The fourth inclined surface on the protrusion 19 is squeezed to push the second protrusion 19 to slide vertically upward in the limiting groove 20, so as to drive the second connecting rod 18 to swing and tend to the horizontal state. In the process of tending to the horizontal state, the first connecting rod 16 is pushed horizontally to slide on the support plate 13, and the arc-shaped piece 17 is pushed to squeeze the bag mouth of the knife bag 3, so that the inner wall of the bag mouth of the knife bag 3 fits the surface of the knife. At this time, the first connecting rod 16 and the second connecting rod 18 are on the same horizontal line. Before the second connecting rod 18 swings toward the horizontal state, as the rotating shaft on the second protrusion 19 slides in the limiting groove 20, the rotating shaft on the second protrusion 19 slides through the limiting block 21, and the position of the second protrusion 19 is limited, so that the first connecting rod 16 and the second connecting rod 18 are always in a horizontal state;

[0045] As the electric telescopic rod 11 continues to move upward, the tool is also driven to move upward, and the surface of the tool is brought into contact and rubbed with the opening of the tool bag 3, so that the lubricating oil remaining on the surface of the tool is wiped and cleaned; at the same time, because the second protrusion 19 is limited by the limit block 21, the first protrusion 15 is forced to deform to slide and squeeze over the second protrusion 19, and the tool continues to move upward under the movement of the electric telescopic rod 11 to slide and rub with the opening of the tool bag 3, and the first connecting rod 16 and the second connecting rod 18 stay at corresponding positions due to the limitation of the limit block 21, so that the lubricating oil attached to the surface of the tool is wiped and cleaned;

[0046] After wiping and cleaning is completed, when the next tool needs to be maintained, the bag mouth of the tool bag 3 needs to be reset so that the next tool can be smoothly inserted into the inside of the tool bag 3. By starting the electric telescopic rod 11, the first protrusion 15 is driven to move downward, so that the second inclined surface slides against the third inclined surface, and the rotating shaft on the second protrusion 19 is driven to slide downward inside the limit groove 20, and slide and squeeze to pass through the limit block 21, driving the second connecting rod 18 to swing downward, thereby pulling the first connecting rod 16 to slide in the opposite direction, so that the arc-shaped piece 17 loses the squeezing and fixing on the bag mouth of the tool bag 3, so that the next tool can smoothly enter the tool bag 3 for maintenance.

[0047] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A tool magazine, comprising a magazine body, wherein a tool sleeve for placing a plurality of tools is arranged inside the magazine body, characterized in that: A knife bag for placing a knife is arranged inside each knife sheath, and the bag opening of the knife bag is limited so that the knife bag is driven to have a natural state and a twisted state. In the natural state, the knife enters the knife bag and is located above the lubricating oil. Then the knife bag enters the twisted state from the natural state so that the lubricating oil rises and soaks the knife.

2. A tool magazine according to claim 1, characterized in that: A driving motor is arranged at the bottom of the knife sleeve, and an output shaft of the driving motor penetrates and extends into the interior of the knife sleeve and is connected to the bottom of the knife bag.

3. A tool magazine according to claim 1, characterized in that: A metal sheet is arranged at the bottom of the inner wall of the knife bag, and the metal sheet is used to protect the bottom of the knife bag.

4. A tool magazine according to claim 1, characterized in that: The opening of the knife bag is fixedly connected to a support plate, and the support plate crosses the top of the knife sleeve. The support plate has a central hole for fixing the opening of the knife bag.

5. The tool magazine according to claim 1, characterized in that: When the tool enters the tool bag, it is located above the level of the lubricating oil, that is, the tool does not contact the lubricating oil.

6. The tool magazine according to claim 1, characterized in that: A driving unit is arranged at the bottom of the storage body, and the driving unit includes a motor. A placement plate is rotatably connected inside the storage body, and an output shaft of the motor passes through and extends to the inside of the storage body and is connected to the placement plate.

7. A tool magazine according to claim 6, characterized in that: A plurality of placement holes are provided inside the placement plate, and each of the placement holes is used to place the knife sleeve; two electric telescopic rods are arranged opposite to each other on both sides of the knife sleeve, and the telescopic ends of the electric telescopic rods are in contact with the end of the knife.

8. A tool magazine according to claim 7, characterized in that: A V-shaped opening is provided on the top of the storage body, and the placement hole and the V-shaped opening are in the same vertical direction.

9. A CNC gantry machining center, based on the tool magazine according to any one of claims 1 to 8, characterized in that: The CNC gantry machining center comprises a gantry, the storage body is arranged on the gantry, and a processing table is arranged below the gantry. The processing table is used to place the workpiece so that the tool can process the workpiece placed on the processing table.

10. A CNC gantry machining center according to claim 9, characterized in that: A plurality of supporting legs are arranged at the bottom of the processing table.

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