Machine body mechanism of tool grinding machine and tool grinding machine

Abstract

The utility model discloses a machine body mechanism of a tool grinding machine and the tool grinding machine. The machine body mechanism is used for bearing a grinding assembly and a feeding and discharging transfer assembly. The bed body mechanism comprises a bed body and an outer cover; the lathe bed is used for installing the grinding assembly; the lathe bed comprises a base and a gantry support, and a containing groove and a liquid discharging channel are formed in the upper surface of the base. The gantry support is fixed in the containing groove and matched with the containing groove to form a working area for the grinding assembly to machine. The gantry support comprises a stand column and a cantilever beam, the stand column is vertically arranged in the containing groove, and the cantilever beam is fixed at the end, away from the base, of the stand column so that the cantilever beam can be arranged above the working area in a spanning mode. The outer cover covers the outer part and the top of the gantry bracket and is detachably arranged on the edge of the base; the utility model provides a machine body mechanism of a tool grinding machine and the tool grinding machine. The problems that an existing tool grinding machine is difficult to transport, disassemble and assemble, and oil leakage and liquid leakage are caused by structural layout are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control equipment production, in particular to a bed mechanism of a tool grinder and the tool grinder. Background Art

[0002] At present, most tool grinders on the existing market adopt separate combinations (i.e. grinding component part, electronic control part, loading and unloading mechanism, etc.), (such as Figure 1 (As shown) This separation type needs to be disassembled during transportation and then reassembled at the destination (especially wiring and other assembly processes). Constant disassembly and assembly increases the workload of after-sales service personnel and causes great inconvenience to users. In addition, the loading and unloading areas of some grinders are arranged on the rear side of the machine tool, which is not convenient for operators to replace materials on a daily basis, nor is it convenient to observe the loading and unloading actions. Moreover, there are problems with the bed structure layout of existing tool grinders, and oil and liquid leakage often occurs, that is, coolant and cooling oil seep out of the base of the grinder, and in terms of maintenance, the entire outer cover must be removed before internal parts can be repaired, which increases the difficulty of maintenance personnel.

[0003] In summary, the bed structure of the existing tool grinder needs to be further improved to meet actual production needs. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned defects or problems existing in the background technology, and to provide a bed mechanism of a tool grinder and a tool grinder, which have a simple structure, are easy to manufacture, easy to implement and have low cost, and solve the problems of existing tool grinders that are difficult to transport and disassemble, difficult to assemble, and have oil and liquid leakage caused by the structural layout.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A bed structure of a tool grinder, which is used to carry a grinding assembly and upper and lower material transfer assemblies; the bed structure includes a bed and an outer cover;

[0007] A bed, which is used for mounting the grinding assembly; the bed includes a base and a gantry bracket, the upper surface of the base is provided with a receiving groove and a drainage channel; the gantry bracket is fixed in the receiving groove, and cooperates with the receiving groove to construct a working area for processing the grinding assembly; the gantry bracket includes a column and a suspension beam, the column is erected in the receiving groove, and one end away from the base is fixed to the suspension beam, so that the suspension beam is straddled above the working area;

[0008] The outer cover covers the outer side and the top of the gantry support and is detachably mounted on the edge of the base.

[0009] Furthermore, the power supply wires and cooling pipelines of the grinding assembly are respectively mounted on the columns and / or suspension beams, and the suspension beams are also provided with through holes for the power supply wires to pass through.

[0010] Furthermore, the base and the gantry bracket are made of mineral casting materials.

[0011] Furthermore, the outer cover includes a cover body and a movable door, the cover body is fixed to the base through a connecting piece, and an opening is formed on the front side of the cover body; the movable door is correspondingly mounted on the cover body through a mounting structure to open and close the opening.

[0012] Furthermore, the mounting structure includes a slide rail and a sliding member, wherein the sliding member is mounted on the movable door and cooperates with the slide rail fixed on the cover body, so that the movable door slides along the slide rail to open and close the opening.

[0013] Furthermore, opening windows are respectively provided on the cover body at the left and right sides and the rear side; wherein the opening window at the rear side is configured as an opening window for inspection and maintenance; and the opening windows at the left and right sides are configured as windows for loading and / or unloading materials.

[0014] Furthermore, a cable groove and an explosion-proof hole are provided on the top of the cover body, and the cable groove is communicated with the through hole on the suspension beam.

[0015] Furthermore, the movable door and / or the outer cover is also provided with a transparent viewing window for observing the processing status of the processing area.

[0016] Furthermore, it also includes an auxiliary shell, which is detachably fixed to the left side or the right side of the cover body and is connected to the opening window.

[0017] A tool grinder includes a grinding component, an electric control component and an upper and lower material transfer component; it also includes the bed and the outer cover, the bed is used to install the grinding component and the upper and lower material transfer component; the upper and lower material transfer component includes a manipulator, which is used to transport the grinding workpiece between the processing area and the outside.

[0018] From the above description of the utility model, it can be seen that compared with the prior art, the utility model has the following beneficial effects:

[0019] (1) The utility model provides a bed structure of a tool grinder and a tool grinder, which have a simple structure, are easy to manufacture, easy to implement and low in cost, and solve the problems of existing tool grinders that are difficult to disassemble and assemble during transportation, and have oil and liquid leakage caused by the structural layout. The utility model adopts an integrated bed structure, which does not need to be disassembled during transportation. The corresponding base bottom can be directly lifted by a forklift and can be started and used after being transported to the destination. There is no need for manual complicated installation process, and there is no need to install wiring, pipes, etc. in a small space. More importantly, the utility model retracts and fixes the gantry bracket as a whole in the receiving groove of the base, further increasing the depth of the receiving groove to avoid overflow or seepage of oil or coolant. In addition, the wiring, oil inlet pipe, cooling pipe, etc. of the grinding component are introduced from the gantry bracket, and there is no need to open a lead groove on the base, etc., thereby eliminating the sealing process of the sealing hole and avoiding oil and liquid leakage.

[0020] (2) The present invention provides a through hole on the suspension beam or column, which is used to introduce oil pipes, cables and air pipes into the processing area. The through hole is designed to be located in the middle of the suspension beam, which can minimize the length of the cables, oil pipes and air pipes. In addition, the original method of threading the wires from the base is improved, and the wires are no longer arranged on the base. This reduces the defects of poor sealing and easy leakage of the wire grooves or wire holes on the base, and at the same time provides more space for leading and arranging the wires, making it easier to disassemble and assemble during maintenance and replacement. More importantly, the bottom of the base can adopt a solid structure to reduce the occurrence of shaking and be more stable.

[0021] (3) The new type uses mineral castings to make the base and gantry bracket. This method makes the entire base more stable, free of internal stress, and more resistant to shock, reducing the impact of vibration on the overall processing accuracy.

[0022] (4) The bed of the present invention adopts a split structure, which is designed and manufactured according to the functions of each module. After being manufactured, they are assembled together by screws. During maintenance, one or part of the parts can be removed separately as needed without removing the entire outer cover, thereby improving the defects of the existing arc-type integrated bed, which is bulky and laborious, and inconvenient to disassemble and maintain.

[0023] (5) The outer cover of the present invention is realized by a split splicing structure and is provided with a translational sliding movable door (i.e., a closed processing space is formed by combining the cover body and the movable door). Compared with the existing large-volume arc door design, the movable door of the present invention is light in weight, easy to disassemble and assemble, and more convenient to open and close.

[0024] (6) The novel device has opening windows on the left and right sides and the rear side of the cover body, which not only plays a good protective role but also does not affect the placement of workpieces and internal maintenance. The layout of each part is reasonable and compact. During daily inspection and maintenance, there is no need to remove the entire cover, but only need to remove a part separately, which is simple and practical.

[0025] (7) The present invention also has a transparent viewing window on the movable door and / or the outer cover, so that the staff can observe the processing status, loading and unloading actions, etc. of the processing area.

[0026] (8) The present invention is also provided with an auxiliary shell, which is detachably fixed to the left or right side of the cover body and is in communication with the opening window; the auxiliary shell can be used to place an electric control cabinet, a hydraulic station, a lubrication pump, an air source and air circuit, and a loading and unloading area, etc. The above components are arranged in the auxiliary shell, which is not only beautiful and neat, but also can be collected by the auxiliary shell when oil drips, so as to prevent it from dripping onto the ground.

[0027] (9) The tool grinder described in the present invention also configures the loading and unloading transfer components in the form of an articulated manipulator. The existing three-axis coordinate clamping mechanism is prone to oil dripping along the gap during transportation, and can only be placed in the middle position on the right side of the base. Otherwise, the clamping claws of the clamping mechanism cannot place the workpiece into the processing area. The present invention uses an articulated manipulator as a component for moving the workpiece, which is more flexible and the articulated manipulator is installed in the base to reduce the occurrence of oil dripping and leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 It is a schematic diagram of the three-dimensional structure of the prior art;

[0030] Figure 2 It is a three-dimensional structural schematic diagram of the tool grinder bed mechanism of the utility model;

[0031] Figure 3 It is a three-dimensional structural schematic diagram of the base and the gantry support of the utility model in a combined state;

[0032] Figure 4 This is a schematic diagram of the three-dimensional decomposition structure of the outer cover of the utility model.

[0033] Figure 5 It is a three-dimensional structural schematic diagram of the base and the outer cover of the utility model in a combined state;

[0034] Figure 6 It is a three-dimensional structural schematic diagram of the movable door and the outer cover of the utility model in a combined state;

[0035] Figure 7 It is a schematic diagram of the three-dimensional structure of the rear side of the outer cover of the utility model;

[0036] Figure 8 It is a three-dimensional structural schematic diagram of the auxiliary shell of the utility model. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are preferred embodiments of the utility model and should not be regarded as excluding other embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0038] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. are for distinguishing different objects rather than for describing a specific order.

[0039] In the claims, specification and the above-mentioned drawings of the utility model, unless otherwise explicitly defined, directional words, such as the use of terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the referred device or element must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the utility model.

[0040] In the claims, specification and the above drawings of the utility model, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two parties, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0041] In the claims, specification and drawings of the present utility model, if the terms "including", "having" and their variations are used, they are intended to mean "including but not limited to".

[0042] See also Figure 2-8The bed structure of a tool grinder and the tool grinder described in the present invention are used to carry grinding components, loading and unloading material transfer components, etc.; the bed structure mainly includes the following components: bed 1, base 11, receiving tank 111, drainage channel 112, gantry bracket 12, column 121, suspension beam 122, outer cover 2, cover body 21, opening 211, opening window 212, cable groove 213, explosion-proof hole 214, transparent visual window 215, movable door 22, mounting structure 3, slide rail 31, sliding joint 32, auxiliary shell 4, loading and unloading material transfer components 5, articulated manipulator 51, through hole 6, switch door 7 and grinding components (not shown in the figure);

[0043] The bed structure comprises a bed body 1 and an outer cover 2;

[0044] The bed 1 is used for mounting a grinding assembly (not shown) and upper and lower material transfer assemblies 5;

[0045] like Figure 2 As shown, the Figure 2 It is used to show the three-dimensional structure of the entire tool grinder, showing the overall layout of the bed 1, the outer cover 2, the movable door 22, the auxiliary shell 4 and other components;

[0046] like Figure 3 As shown, the bed 1 includes a base 11 and a gantry support 12;

[0047] The base 11 in this embodiment is illustrated by a base 11 made of a mineral casting material. It should be noted that the mineral casting is a product of natural granite or marble combined with epoxy resin, which has good shock resistance and shock absorption. The base 11 is exemplified by a square-shaped base, on which a receiving groove 111 and a drainage channel 112 are excavated. In addition, a plurality of assembly holes are provided on the upper surface and side surfaces of the base 11 for subsequent screw assembly with the gantry bracket 12, the auxiliary shell 4, the grinding assembly, the upper and lower material transfer assemblies 5, etc.

[0048] The receiving groove 111 is a concave groove body cut downward from the upper surface of the base 11 made of a mineral casting. In order to carry and accommodate the entire gantry bracket 12, the length and width of the receiving groove 111 of the entire base 11 are greater than the length and width of the gantry bracket 12. In this way, even if the components installed on the gantry bracket 12 have oil overflow or seepage, they can be received and collected by the receiving groove 111 and are not easy to leak out. In addition, a drainage channel 112 is provided in the receiving groove 111 to collect cooling oil, coolant, etc.

[0049] In this embodiment, the gantry bracket 12 includes a column 121 and a suspension beam 122, and the column 121 and the suspension beam 122 are both made of marble, which form a square strip of stone, which has the function of earthquake resistance and shock absorption; the two columns 121 are vertically arranged on the upper surface of the base 11 (arranged in the receiving groove 111), and are fixed by connecting parts, which are generally fixed by connecting parts and then sealed with glue; and the suspension beam 122 is fixed at the end away from the base 11 for the suspension beam 122, which is also fixed by connecting parts, so as to form a gantry bracket 12 suspended on the base 11, and the gantry bracket 12 and the receiving groove 111 of the base 11 are connected. The part between the two ends forms a working area A, where the working area A can be used to install grinding components, place workpieces, articulated manipulators 51, etc.; in addition, a number of mounting holes for assembly and connection with components such as the outer cover 2, and a through hole 6 opened in the middle of the suspension beam 122 are provided on the column 121 and the suspension beam 122. The through hole 6 is used to introduce oil pipes, cables, and air pipes into the processing area A. The position design in the middle can also minimize the length of cables, oil pipes, and air pipes, making them more regular, less prone to entanglement and disorder, and entering the above-mentioned pipe body from the top of the suspension beam, so that the base 11 does not need to have a hole, thereby reducing the risk of leakage of oil and the like from the opening.

[0050] Outer cover 2, such as Figure 4-7 As shown, it covers the outside and top of the gantry bracket 12 and is installed on the edge of the base 11.

[0051] In this embodiment, the outer cover 2 includes a cover body 21 and a movable door 22, and the cover body 21 is fixed to the base 11 by a connecting member (in this embodiment, screws are used as connecting members as an example);

[0052] In this embodiment, (such as Figure 4 The cover body 21 is divided into three parts: a bottom frame 21A, a front cover 21B and a rear cover 21C. The three parts are arranged separately for easy processing and forming, and then assembled and fixed by connecting parts for subsequent maintenance. The bottom frame 21A is arranged in a square shape, and its length and width are the same as those of the base 11. When assembling, the bottom frame 21A is first aligned with the edge of the base 11 and locked.

[0053] The front cover 21B is provided with an opening 211, and then the front cover 21B with the opening 211 and the rear cover 21C with the opening window 212 are respectively placed on the bottom frame 21A. At this time, the front cover 21B and the rear cover 21C cover the entire gantry bracket 12, and then the front cover 21B and the rear cover 21C are spliced ​​and screwed together through a connecting piece to form a complete cover body 21;

[0054] It should be noted that an explosion-proof hole 214 is also provided at the top of the rear cover 21C, and a cable trough 213 is formed between the top of the rear cover 21C and the suspension beam 122 for arranging cables and oil pipes, gas pipes, etc.;

[0055] (As shown in Figure 5) After the above assembly, a transparent visual window 215 and an opening window 212B are respectively opened on the front side and the left and right sides of the front cover 21B. The opening window 212B here is for subsequent assembly and connection with the auxiliary shell 4 to connect the auxiliary shell 4 with the processing area A (in the present invention, this opening window 212B is configured as a window for loading and / or unloading); and the transparent visual window 215 is used to observe the internal processing of the outer cover 2 and the base 11.

[0056] (like Figure 6 As shown in the figure, an opening 211 is formed at the front side of the front cover 21B, and a movable door 22 is installed at the position of the opening 211, that is, the movable door 22 is installed and opened and closed by the mounting structure 3; the mounting structure 3 here can be a sliding mounting structure, a hinged mounting structure, etc., to achieve the translational sliding or rotation of the movable door 22 relative to the cover body 21;

[0057] In this embodiment, the sliding installation structure 3 includes a slide rail 31 and a sliding member 32. The sliding member 32 is installed and fixed on the upper edge of the movable door 22, and cooperates with the slide rail 31 fixed on the cover body 21 (that is, embedded in the slide rail 31). The movable door 22 is pulled to slide along the slide rail 31 to open or close the opening 211. In this way, the sliding push-pull movable door 22 is not only lightened and easy to open and close, but also greatly reduced in size, making it more convenient to operate.

[0058] (like Figure 7 (As shown in the figure) In this embodiment, not only is a switch window 212B provided on the front cover 21B, but an opening window 212A is also provided on the rear side of the rear cover 21C, and a switch door 7 is provided corresponding to the position of the opening window 212A; the opening window 212A of the rear cover 21C is configured as an opening window for inspection and maintenance, and subsequent maintenance can be carried out by opening the corresponding opening window 212A alone (especially convenient for daily maintenance of the equipment).

[0059] (As shown in 6 and 8) it also includes an auxiliary shell 4, which is detachably fixed to the left or right side of the cover body 21 and is connected to the opening window 212B; the auxiliary shell 4 in this embodiment is detachably installed on the left or right side of the cover body 21 through a connecting piece, and can be used to place an electric control cabinet, a hydraulic station, a lubrication pump, an air source and air circuit, and a loading and unloading area, etc., wherein this embodiment takes the loading and unloading area as an example, and an articulated manipulator 51 is installed in the base 11, which can be extended into the opening window 212B to clamp the workpiece placed in the loading and unloading area to realize the transfer of the workpiece; in addition, the auxiliary shell 4 is fixed to the base 11 and the side of the cover body 21 to form an integrated body, which is convenient for subsequent transportation, etc.

[0060] During actual assembly: Figure 2-8As shown, a tool grinder is used as an example;

[0061] (1) Select an integrated mineral casting (i.e., natural or artificial marble) and cut it into a base 11, a column 121, and a suspension beam 122, and carve a receiving groove 111 on the base 11;

[0062] (2) The two columns 121 are inserted into the left and right sides of the receiving groove 111, and the suspension beam 122 with the through hole 6 is fixed on the top of the column 121, and then the parts are fixed by connecting members (i.e. screws);

[0063] (3) Then, the fixing plate B and the like for fixing the grinding assembly are installed in the receiving groove 111, and the grinding assembly of corresponding specifications is assembled according to actual needs (not shown in the figure);

[0064] (4) Assemble the housing 21 of the outer housing 2 to the base 11. In this embodiment, in order to facilitate assembly, the housing 21 is divided into three parts: a bottom frame 21A, a front cover 21B and a rear cover 21C. During assembly, the bottom frame 21A is first aligned with the edge of the base 11 and locked, and then the front cover 21B with an opening 211 and the rear cover 21C with an opening window 212 are respectively placed on the bottom frame 21A, and the front cover 21B and the rear cover 21C are screwed together to form a complete housing 21. It should be noted that an explosion-proof hole 214 and a cable groove 213 are also provided on the top of the rear cover 21C. Then, a switch door 7 is installed on the rear side of the rear cover 21C at a position corresponding to the opening window 212.

[0065] The movable door 22 at the front side of the front cover 21B is assembled through the mounting structure 3, that is, a sliding member 32 is installed on the movable door 22, and a slide rail 31 is installed transversely at the position of the opening 211, and the sliding member 32 is installed on the slide rail 31, so that the movable door 22 can slide along the slide rail 31 to open or close the opening 211;

[0066] (5) The auxiliary housing 4 is installed on the left or right side of the front cover 21B, and the auxiliary housing 4 is connected to the opening window 212 on the side of the front cover 21B, so that the upper and lower material transfer assembly 5 (i.e., the articulated manipulator 51) can transport the abrasive material; the articulated manipulator 51 described in the present embodiment is used as an example of the upper and lower material transfer assembly;

[0067] (6) Then, an electric control cabinet, a hydraulic station, a lubrication pump, an air source and an air circuit are installed in another auxiliary housing 4; after assembly, the components are assembled into one piece and directly transported to the destination for commissioning and use by a forklift.

[0068] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A bed structure of a tool grinder, which is used to carry a grinding assembly and an upper and lower material transfer assembly; characterized in that: The bed structure comprises a bed body and an outer cover; A bed, which is used for mounting the grinding assembly; the bed includes a base and a gantry bracket, the upper surface of the base is provided with a receiving groove and a drainage channel; the gantry bracket is fixed in the receiving groove, and cooperates with the receiving groove to construct a working area for processing the grinding assembly; the gantry bracket includes a column and a suspension beam, the column is erected in the receiving groove, and one end away from the base is fixed to the suspension beam, so that the suspension beam is straddled above the working area; The outer cover covers the outer side and the top of the gantry support and is detachably mounted on the edge of the base.

2. A bed structure of a tool grinder according to claim 1, characterized in that: The power supply wire and cooling pipeline of the grinding assembly are respectively mounted on the column and / or the suspension beam, and the suspension beam is also provided with a through hole for the power supply wire to pass through.

3. The bed structure of a tool grinder according to claim 1, characterized in that: The base and the gantry bracket are made of mineral casting materials.

4. A bed structure of a tool grinder according to claim 1, 2 or 3, characterized in that: The outer cover comprises a cover body and a movable door. The cover body is fixed to the base through a connecting piece, and an opening is formed on the front side of the cover body. The movable door is correspondingly mounted on the cover body through a mounting structure to open and close the opening.

5. A bed structure of a tool grinder according to claim 4, characterized in that: The installation structure comprises a slide rail and a slide joint. The slide joint is installed on the movable door and matches with the slide rail fixed on the cover body so that the movable door slides along the slide rail to open and close the opening.

6. The bed structure of a tool grinder according to claim 4, characterized in that: Opening windows are respectively provided on the cover body at the left and right sides and the rear side; wherein the opening window at the rear side is configured as an opening window for inspection and maintenance; and the opening windows at the left and right sides are configured as windows for loading and / or unloading materials.

7. A bed structure of a tool grinder according to claim 6, characterized in that: A cable groove and an explosion-proof hole are also provided on the top of the cover body, and the cable groove is communicated with the through hole on the suspension beam.

8. The bed structure of a tool grinder according to claim 7, characterized in that: The movable door and / or the outer cover is also provided with a transparent viewing window for observing the processing status of the processing area.

9. The bed structure of a tool grinder according to claim 6, characterized in that: It also includes an auxiliary shell, which is detachably fixed to the left side or the right side of the cover body and is in communication with the opening window.

10. A tool grinder, comprising a grinding assembly, an electric control assembly, and an upper and lower material transfer assembly; characterized in that: It also includes a bed and an outer cover as described in any one of claims 1-9, wherein the bed is used to install a grinding component and an upper and lower material transfer component; the upper and lower material transfer component includes an articulated manipulator for transporting the grinding workpiece between the processing area and the outside.

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