Workpiece processing device

Abstract

This invention relates to a workpiece processing apparatus configured to process a workpiece using hydraulic pressure, wherein: the workpiece processing apparatus includes a main component; the main component includes a base component, a punch, and a piston; the base component forms a hydraulic chamber; the hydraulic chamber is capable of being filled with liquid; the hydraulic chamber has a workpiece processing chamber and a hydraulic generation chamber; the workpiece processing chamber and the hydraulic generation chamber are combined and each has an opening; the openings open outward from the base component; the punch is movable between an initial position and a receiving position; when the opening of the workpiece processing chamber is covered by the workpiece, as the punch moves from the initial position to the receiving position, the punch presses the workpiece into the workpiece processing chamber; the piston is partially received in the hydraulic generation chamber, such that the piston is movable and partially protrudes within the hydraulic generation chamber; when the hydraulic chamber is filled with liquid, during the movement of the punch, the piston is subjected to pressure toward the hydraulic generation chamber and moves according to the pressure, increasing the hydraulic pressure of the liquid.

Description

Technical Field

[0001] The present invention relates to a workpiece processing apparatus configured to use hydraulic pressure to process a workpiece.

[0002] For example, this type of workpiece processing apparatus is disclosed in JPH08-150426A (Patent Document 1), the contents of which are incorporated herein by reference. Background Technology

[0003] refer to Figure 15 Patent Document 1 discloses a workpiece processing apparatus 90, which is a typical existing workpiece processing apparatus, configured to process material (object) 98 using hydraulic pressure. The workpiece processing apparatus 90 includes a mold 91, a blank holder 92, a punch 93, and a hydraulic control device 95. The mold 91 has a hydraulic chamber 94. The hydraulic chamber 94 is filled with a liquid such as oil. The hydraulic pressure of the liquid is controlled by the hydraulic control device 95, which includes a pump and a pressure reducing valve. The blank holder 92 can be moved vertically by a power device (not shown). The punch 93 can be moved vertically relative to the blank holder 92 by another power device (not shown). When the blank holder 92 moves downward, the object 98 is clamped between the mold 91 and the blank holder 92. Subsequently, when the punch 93 moves downward, the object is drawn using hydraulic pressure.

[0004] The workpiece processing apparatus 90 disclosed in Patent Document 1 has a complex hydraulic control mechanism including a pump and a pressure reducing valve. However, there is a need for a workpiece processing apparatus with a simpler structure. Summary of the Invention

[0005] Therefore, the object of the present invention is to provide a new workpiece processing apparatus which is configured to process workpieces using hydraulic pressure and has a simpler structure.

[0006] One aspect of the present invention provides a workpiece processing apparatus configured to process a workpiece using hydraulic pressure. The workpiece processing apparatus includes a main component. The main component includes a base component, a punch, and a piston. The base component forms a hydraulic chamber. The hydraulic chamber can be filled with liquid. The hydraulic chamber has a workpiece processing chamber and a hydraulic generation chamber. The workpiece processing chamber and the hydraulic generation chamber are combined and each has an opening. The openings open outward from the base component at different locations. The punch is movable between an initial position away from the opening of the workpiece processing chamber and a received position where the punch is partially received in the workpiece processing chamber through the opening. When the punch moves from the initial position to the received position with the workpiece covering the opening of the workpiece processing chamber, the punch presses the workpiece into the workpiece processing chamber. The piston is partially received in the hydraulic generation chamber through the opening, such that the piston is movable within and partially protrudes from the hydraulic generation chamber. When the hydraulic chamber is filled with liquid, during the movement of the punch from the initial position to the received position, the piston receives pressure via an elastic member toward the hydraulic generation chamber, and the piston moves according to the pressure, increasing the hydraulic pressure of the liquid.

[0007] In one aspect of the invention, the piston moves according to the pressure applied via an elastic member, increasing the hydraulic pressure of the fluid. According to this structure, by utilizing the elasticity of the elastic member without providing a pressure-reducing valve, excessive increase in hydraulic pressure can be prevented. Furthermore, by eliminating the need for a pressure-reducing valve, the fluid is kept within the hydraulic chamber, thus eliminating the need for an external fluid supply. Therefore, a complex hydraulic control mechanism including a pump and a pressure-reducing valve is unnecessary. Another aspect of the invention provides a novel workpiece processing apparatus configured to process workpieces using hydraulic pressure and possessing a simpler structure.

[0008] The purpose of the invention and its structure can be understood more fully by studying the following description of preferred embodiments and referring to the accompanying drawings. Attached Figure Description

[0009] Figure 1 This is a perspective view of a workpiece processing apparatus according to an embodiment of the present invention, wherein the object is disposed on the workpiece processing apparatus. Although the punch and the spacer shown are separate from the slide, the actual punch and the actual spacer are fixed to the slide. A portion of the workpiece processing apparatus surrounded by dotted lines is enlarged and shown, and in the enlarged view, the location of the hidden branch channel is shown by dashed lines.

[0010] Figure 2 It is shown Figure 1 The front view of the workpiece processing device, in which the position of the hidden punch is shown by dashed lines;

[0011] Figure 3 It is shown Figure 1A rear view of the workpiece processing device, with the location of the hidden hydraulic chamber shown by dashed lines;

[0012] Figure 4 It is shown Figure 1 A top view of the workpiece processing device, in which the sliding element is not shown, and the location of the hidden workpiece processing chamber opening and the hidden piston are shown in dashed lines;

[0013] Figure 5 It is shown Figure 4 A cross-sectional view of the workpiece processing device taken along line VV, wherein the slider is located at the upper position, the lower end of the slider is shown by a dashed line, and a portion of the workpiece processing device surrounded by a dotted line is enlarged and shown.

[0014] Figure 6 It is shown Figure 4 A cross-sectional view of the workpiece processing device taken along line VI-VI, wherein the slider is located at the upper position and the lower end of the slider is shown by a dashed line;

[0015] Figure 7 It is shown Figure 5 Another cross-sectional view of the workpiece processing apparatus, in which the slider moves downward, the lower end of the spacer contacts the piston, the lower end of the retainer contacts the object, and a portion of the workpiece processing apparatus enlarged and shown by the dashed line.

[0016] Figure 8 It is shown Figure 7 Another cross-sectional view of the workpiece processing apparatus, in which the slider moves further downward, the spacer presses the piston, the lower end of the punch contacts the object, and a portion of the workpiece processing apparatus surrounded by dotted lines is enlarged and shown.

[0017] Figure 9 It is shown Figure 8 Another cross-sectional view of the workpiece processing device, in which the slider moves further downward and is located in the lower position;

[0018] Figure 10 It is shown by Figure 9 An enlarged cross-sectional view of a portion of the workpiece processing device enclosed by the dashed line A;

[0019] Figure 11 It is shown by Figure 10 An enlarged cross-sectional view of a portion of the workpiece processing device enclosed by the dashed line B.

[0020] Figure 12 It is shown by Figure 11 An enlarged cross-sectional view of a part of the workpiece processing device enclosed by the dashed line C;

[0021] Figure 13 It is shown Figure 1 A top view of a variant of the workpiece processing device, with the location of the hidden hydraulic generation chamber shown by dashed lines;

[0022] Figure 14 It is shown Figure 13 A cross-sectional view of the base components, piston, and spacer of the workpiece processing apparatus, wherein the cross-section shown corresponds to... Figure 5 The cross-section;

[0023] Figure 15 This is a cross-sectional view showing the workpiece processing apparatus of Patent Document 1.

[0024] While the invention is open to various modifications and alternatives, specific embodiments thereof are shown by way of example in the accompanying drawings and will be described in detail herein. However, it should be understood that the drawings and the detailed description thereof are not intended to limit the invention to the specific forms disclosed; rather, the invention is intended to cover all modifications, equivalents, and substitutions falling within the spirit and scope of the invention as defined by the appended claims. Detailed Implementation

[0025] refer to Figure 1 According to an embodiment of the present invention, the workpiece processing apparatus 10 is a workpiece processing apparatus configured to process the workpiece (blank) 82 of the object 80 using hydraulic pressure. In this embodiment, "hydraulic pressure" refers to a liquid 50L (see...) Figure 5 The pressure applied to workpiece 82, as described later, includes the concepts of "hydraulic counter-pressure OP" and "peripheral hydraulic PP" as described below. In this embodiment, object 80 is a single metal sheet and has a thin, flat shape before being processed. (Reference) Figure 1 and Figure 4 The object 80 shown has a carrier 81 and three workpieces 82 connected to the carrier 81.

[0026] The workpiece processing apparatus 10 of this embodiment is suitable for progressive processing of an object 80. However, the present invention is not limited thereto, but can be applied to apparatuses that perform transfer processing on an object 80. Furthermore, the object 80 may be one of the workpieces 82 that are separate from the carrier 81. Therefore, the workpiece processing apparatus 10 may be an apparatus that performs a single processing on only one of the workpieces 82.

[0027] like Figures 1 to 3As shown, the workpiece processing apparatus 10 of this embodiment includes a base component 20, a movable component 60, and three pistons 42, each piston being made of metal. The movable component 60 is located above the base component 20 and the pistons 42 in the vertical direction. In this embodiment, the vertical direction is the Z-direction. In this embodiment, "upward" refers to the positive Z-direction, and "downward" refers to the negative Z-direction. The vertical direction is preferably aligned with the direction of gravity. However, the invention is not limited thereto. For example, the vertical direction may intersect the direction of gravity within the range where the object 80 can be processed.

[0028] like Figure 1 As shown, the base component 20 has a channel 18. The channel 18 is a downwardly recessed space. The channel 18 extends continuously in a transverse direction perpendicular to the vertical direction and opens outward at its opposite ends in the transverse direction. In this embodiment, the transverse direction is the Y direction. The channel 18 has a bottom surface extending along a horizontal plane (XY plane) perpendicular to the vertical direction. The object 80 is placed on the bottom surface of the channel 18. The workpiece 82 of the object 80 is arranged in the transverse direction.

[0029] refer to Figures 1 to 3 In this embodiment, the workpiece processing apparatus 10 includes only the base component 20, the movable component 60, and the piston 42 as described above. The workpiece processing apparatus 10 has a small size, at most a few tens of centimeters in the lateral direction. However, the present invention is not limited to this, but can be applied to large workpiece processing apparatus 10. In addition, the workpiece processing apparatus 10 may also include other components besides those described above.

[0030] The base component 20 in this embodiment includes three base components 20F, 20S, and 20T, namely, the first component (base component) 20F, the second component (base component) 20S, and the third component (base component) 20T. The base components 20F, 20S, and 20T are arranged in the transverse direction. The three base components 20F, 20S, and 20T can respectively process three workpieces 82.

[0031] The formation process of this embodiment includes three processing steps. The workpiece processing apparatus 10 of this embodiment includes three base components 20F, 20S, and 20T, respectively used for the three processing steps. The base components 20F, 20S, and 20T of this embodiment are formed separately from each other and arranged in the transverse direction without gaps between them. According to this embodiment, two or more base components 20F, 20S, 20T, etc., can be arranged depending on the number of processing steps. However, the present invention is not limited thereto. For example, the base components 20F, 20S, and 20T can be integrally formed with each other. When the number of processing steps is one, the workpiece processing apparatus 10 may include only one base component 20F.

[0032] The base components 20F, 20S, and 20T in this embodiment have the same outline and similar structures. However, the invention is not limited thereto. For example, the base components 20F, 20S, and 20T may have different outlines and structures.

[0033] The following description refers to the base component 20F of this embodiment. The description below applies to each base component 20S and 20T.

[0034] refer to Figure 5 and Figure 1 In this embodiment, the base component 20F includes a base 22, a mold 30 made of metal, and a cylindrical member 40 made of metal. The base 22 includes an upper member 222 made of metal and a lower member 224 made of metal. The upper member 222 rests on the lower member 224. The upper member 222 has the aforementioned channel 18. The base component 20F has a hydraulic chamber 50. The hydraulic chamber 50 is an internal space located within the base component 20F and is enclosed within the base component 20F except for some openings described later. The hydraulic chamber 50 may be filled with a liquid 50L, such as oil. The illustrated hydraulic chamber 50 is filled with liquid 50L.

[0035] See Figure 5 In this embodiment, the base component 20F is formed by combining an upper component 222, a lower component 224, a mold 30, and a cylindrical component 40. With this structure, the hydraulic chamber 50 can be easily formed. However, the invention is not limited thereto. For example, the upper component 222, the mold 30, and the cylindrical component 40 can be integrally formed with each other. In addition to the components described above, the base component 20F may also include other components.

[0036] Each of the mold 30 and the cylindrical member 40 in this embodiment has a cylindrical shape extending in the vertical direction. Each of the mold 30 and the cylindrical member 40 has a central hole with a cylindrical shape extending in the vertical direction. The upper component 222 has two attachment holes 223, each with a cylindrical shape. The mold 30 and the cylindrical member 40 are respectively fitted into the two attachment holes 223. These cylindrical components can be easily fitted into the cylindrical holes while eliminating gaps that could allow liquid 50L to leak. However, the invention is not limited thereto. The shapes of the mold 30 and the cylindrical member 40 are not particularly limited, as long as each of the mold 30 and the cylindrical member 40 has a central hole.

[0037] The mold 30 and the cylindrical member 40 have upper end faces that protrude upwards from the upper part 222. The mold 30 is located in front of the cylindrical member 40 in the front-rear direction perpendicular to the vertical and horizontal directions. In this embodiment, the front-rear direction is the X direction. In this embodiment, "front" indicates the positive X direction, and "rear" indicates the negative X direction. The upper end face of the mold 30 forms part of the bottom surface of the channel 18. Reference Figure 1 and 11 A recess 32 is formed on the upper end face of the mold 30. The recess 32 is a downwardly recessed space. The recess 32 has an annular shape in the XY plane and surrounds the central hole of the mold 30.

[0038] like Figure 5 As shown, the hydraulic chamber 50 has a workpiece processing chamber 51 and a hydraulic generation chamber 53. The workpiece processing chamber 51 and the hydraulic generation chamber 53 are combined and each has an opening 52 and an opening 54. The openings 52 and 54 open outward from the base member 20F at different locations from each other.

[0039] Specifically, each of the workpiece processing chamber 51 and the hydraulic generation chamber 53 extends vertically and opens upwards. In other words, the workpiece processing chamber 51 and the hydraulic generation chamber 53 extend parallel to each other in the vertical direction and each has an upwardly opening opening 52 and 54. In this embodiment, the openings 52 and 54 open at different locations on the upper end face of the base member 20F. In addition to the workpiece processing chamber 51 and the hydraulic generation chamber 53, the hydraulic chamber 50 in this embodiment also has a connecting chamber 55. The connecting chamber 55 extends in the front-rear direction and connects the lower ends of the workpiece processing chamber 51 and the lower ends of the hydraulic generation chamber 53 together.

[0040] The workpiece processing chamber 51 and the hydraulic generation chamber 53 have the above-described structure. However, the present invention is not limited thereto, and the structure of the workpiece processing chamber 51 and the hydraulic generation chamber 53 can be modified in various ways.

[0041] For example, Figure 13 and Figure 4 In comparison, the workpiece processing apparatus 10A according to a variant includes a base component 20A that is different from the base component 20 of this embodiment. Figure 14 and Figure 5In comparison, in this variant, the base component 20F of the base component 20A has a hydraulic chamber 50A that is different from the hydraulic chamber 50. The hydraulic chamber 50A has the same workpiece processing chamber 51 as the hydraulic chamber 50, but has a hydraulic generation chamber 53A that is different from the hydraulic generation chamber 53. The hydraulic generation chamber 53A extends in the front-rear direction and opens rearward. Therefore, in this variant, the openings 52 and 54 open outward from the base component 20F at different surfaces. The lower end of the workpiece processing chamber 51 and the front end of the hydraulic generation chamber 53A are joined together, without forming a joining chamber 55 between them. According to this variant, it is not necessary to provide a joining chamber 55.

[0042] In this embodiment, the workpiece processing chamber 51 extends through the central hole of the mold 30. The opening 52 of the workpiece processing chamber 51 is located on the upper end face of the mold 30. In this embodiment, the hydraulic generation chamber 53 extends through the central hole of the cylindrical member 40. The opening 54 of the hydraulic generation chamber 53 is located on the upper end face of the cylindrical member 40 and above the opening 52. Each of the workpiece processing chamber 51 and the hydraulic generation chamber 53 has a circular shape in the XY plane. The coupling chamber 55 has a circular shape in a vertical plane (YZ plane) perpendicular to the front-back direction.

[0043] refer to Figure 5 and Figure 10 as well as Figure 1 In this embodiment, the hydraulic chamber 50 also has four branch channels 56. The four branch channels 56 are located in front of the workpiece processing chamber 51, behind the workpiece processing chamber 51, and on opposite lateral sides of the workpiece processing chamber 51, respectively. Each branch channel 56 branches off from the workpiece processing chamber 51. Specifically, a portion of the lower end face of the mold 30 is located slightly above the upper end face of the lower component 224, and this arrangement forms a flow channel extending outward from the workpiece processing chamber 51 in the XY plane. Each branch channel 56 extends upward from this flow channel.

[0044] Each branch channel 56 extends vertically parallel to the workpiece machining chamber 51, passing through a small hole formed in the mold 30 and opening upwards. Each such branch channel 56 has an opening 57 opening outwards from the base component 20F. (Reference) Figure 11 Each opening 57 is located on the bottom surface of the recess 32 of the mold 30. Each opening 57 thus formed is located slightly below the opening 52 of the workpiece processing chamber 51.

[0045] See Figure 5 The hydraulic chamber 50 of this embodiment has the structure described above. However, the present invention is not limited thereto, and the structure of the hydraulic chamber 50 can be modified as needed. For example, a connecting chamber 55 and a branch channel 56 can be provided as needed. Optionally, the hydraulic chamber 50 may have other parts in addition to the parts described above.

[0046] See Figure 6 In this embodiment, the three pistons 42 are configured to correspond to the three hydraulic chambers 50 respectively. The following description will focus on the pistons 42 corresponding to the hydraulic chambers 50 of the base component 20F. The description below applies to each piston 42.

[0047] like Figure 1 and 5 As shown, the piston 42 of this embodiment has a main body 44 and a pressurized portion 46. Each of the main body 44 and the pressurized portion 46 has a cylindrical shape extending in the vertical direction. The dimension of the pressurized portion 46 in the XY plane is larger than other dimensions of the main body 44 in the XY plane. The main body 44 extends downward from the lower end of the pressurized portion 46.

[0048] See Figure 5 The piston 42 is partially received in the hydraulic generation chamber 53 through the opening 54, allowing the piston 42 to move within the hydraulic generation chamber 53. The piston 42 also partially protrudes from the hydraulic generation chamber 53. According to this embodiment, the body 44 of the piston 42 is inserted into the hydraulic generation chamber 53, passing downward through the opening 54. The inserted body 44 is movable in the vertical direction. Therefore, in this embodiment, the piston 42 is partially received in the hydraulic generation chamber 53, allowing the piston 42 to move in the vertical direction and protrude upward from the hydraulic generation chamber 53.

[0049] In this embodiment, the lower part of the main body 44 is received in a central hole formed in the cylindrical member 40, with substantially no gap between them. On the other hand, the upper part of the main body 44 protrudes upward from the hydraulic generation chamber 53. The lower end of the main body 44 is in contact with the liquid 50L. An O-ring 48 is attached to the lower part of the main body 44 to prevent leakage of the liquid 50L.

[0050] The piston 42 of this embodiment has the structure described above and is attached to the base member 20F as described above. However, the invention is not limited thereto. For example, an O-ring 48 may be provided as needed. See also... Figure 14 In the variant shown, the piston 42 is inserted into the hydraulic generation chamber 53 by passing forward through the rearward-opening opening 54. The piston 42 protrudes rearward from the hydraulic generation chamber 53. The piston 42 can move in the back-and-forth direction within the hydraulic generation chamber 53.

[0051] refer to Figure 1 The movable part 60 of this embodiment will be described below.

[0052] The movable component 60 in this embodiment includes a slider 61, three workpiece processing components 62, and three spacers 72. Therefore, the workpiece processing apparatus 10 in this embodiment includes a slider 61, workpiece processing components 62, and spacers 72.

[0053] See Figures 1 to 3 In this embodiment, the slider 61 is located above the base component 20 in the vertical direction. The slider 61 is supported by a power unit (not shown) and can... Figures 1 to 3 The upper position shown (object 80 is not processed) and Figure 9 The lower position shown (where the object 80 is processed) moves vertically. The slider 61 in this embodiment has a flat plate shape extending along the XY plane. However, the shape and internal structure of the slider 61 of the present invention are not specifically limited.

[0054] refer to Figure 4 Three workpiece processing components 62 are arranged to correspond to the three base components 20F, 20S, and 20T, respectively. The workpiece processing components 62 are located at positions corresponding to the openings 52 of the workpiece processing chamber 51 in the XY plane. From this arrangement, it can be seen that the number of workpiece processing components 62 can correspond to the number of workpieces 82 (see [reference]) on the object 80. Figure 1 The number of parts to be processed. For example, when the workpiece processing apparatus 10 includes only the base part 20F, the number of workpiece processing parts 62 can be one.

[0055] refer to Figure 2 and Figure 5 Each workpiece processing component 62 in this embodiment includes a base 63 made of metal, a punch 64 made of metal, a retainer 65 made of metal, and a retainer support component 66 formed by one or more metal springs. Therefore, the workpiece processing apparatus 10 of this embodiment includes a base 63, a punch 64, a retainer 65, and a retainer support component 66. Each punch 64 has a circular shape in the XY plane. Each of the base 63 and the retainer 65 has an annular shape in the XY plane. Each workpiece processing component 62 of this embodiment includes the above-described components. However, the invention is not limited thereto. For example, the shape of each component of each workpiece processing component 62 is not specifically limited.

[0056] See Figure 4 Three spacers 72 are provided, each corresponding to one of the three pistons 42. The positions of the spacers 72 correspond to the positions of the pistons 42 in the XY plane. This arrangement shows that the number of spacers 72 can correspond to the number of pistons 42. For example, when the workpiece processing apparatus 10 includes only one piston 42 attached to the base member 20F, the number of spacers 72 can be one.

[0057] refer to Figure 3 and Figure 5Each spacer 72 in this embodiment includes a base 73 made of metal, a pressure part 74 made of metal, and a support member (elastic member) 76 formed by one or more metal springs. Therefore, the workpiece processing apparatus 10 of this embodiment includes a base 73, a pressure part 74, and an elastic member 76. Each of the base 73 and the pressure part 74 has a cylindrical shape extending in the vertical direction. Each spacer 72 in this embodiment includes the aforementioned components. However, the invention is not limited thereto. For example, the shape of each component of each spacer 72 is not specifically limited.

[0058] See Figure 5 as well as Figure 2 and Figure 3 The movable component 60 in this embodiment includes the components described above. The punch 64, the retainer 65, and the spacer 72 are fixed to the slider 61 and can move together with the slider 61. However, the invention is not limited thereto. For example, the slider 61, the retainer 65, the retainer support member 66, and the spacer 72 can be provided as needed. For example, when the base component 20 only includes the base component 20F, the movable component 60 may only include one punch 64 corresponding to the base component 20F. Optionally, in addition to the components described above, the movable component 60 may also include other components.

[0059] See Figure 2 as well as Figure 1 In this embodiment, the three punches 64, three retainers 65, and three spacers 72 cooperate with the three base components 20F, 20S, and 20T respectively to process the three workpieces 82 of the object 80. In other words, referring to... Figure 3 The workpiece processing apparatus 10 of this embodiment includes three workpiece processing groups 12, which are configured to process workpieces 82 (see Figure 1 Specifically, the workpiece processing apparatus 10 of this embodiment includes three workpiece processing groups 12, consisting of a first group (workpiece processing group) 12F, a second group (workpiece processing group) 12S, and a third group (workpiece processing group) 12T. However, the present invention is not limited thereto, and the number of workpiece processing groups 12 can be one, two, or more than three. For example, the workpiece processing apparatus 10 may include only one workpiece processing group 12F, or it may include two or more workpiece processing groups 12.

[0060] The workpiece processing group 12 of this embodiment will be described below.

[0061] See Figure 6 as well as Figure 2In this embodiment, each workpiece processing group 12 includes a hydraulic chamber 50, a piston 42, a punch 64, a retainer 65, and a spacer 72. However, the invention is not limited thereto. For example, the workpiece processing apparatus 10 may not include the retainer 65 or the spacer 72. In this case, each workpiece processing group 12 should include a hydraulic chamber 50, a piston 42, and a punch 64.

[0062] See Figure 6 In this embodiment, each piston 42 has the aforementioned body 44. Each body 44 is partially received in the hydraulic generation chamber 53, with its lower end in contact with the liquid 50L.

[0063] See Figure 5 as well as Figure 2 In this embodiment, each punch 64 is secured to the slider 61 by a fixing member such as a screw and extends downward from the lower end of the slider 61. Each base 63 in this embodiment is secured to the slider 61 by a fixing member such as a screw. Each base 63 extends downward from the lower end of the slider 61 while surrounding the punch 64 in the XY plane.

[0064] In this embodiment, each retainer support member 66 is attached to the outer periphery of the base 63 in the XY plane and extends in the vertical direction. Each retainer 65 in this embodiment is located outside the punch 64 in the XY plane. In other words, each retainer 65 surrounds the punch 64 in the XY plane. Each retainer 65 is attached to the lower end of the retainer support member 66. Each retainer support member 66 is elastic and supports the retainer 65, allowing the retainer 65 to move relative to the slider 61. According to this embodiment, the lower end of each punch 64 is located slightly above the lower end of the retainer 65.

[0065] refer to Figure 5 as well as Figure 3 In this embodiment, the base 73 of each spacer 72 is fixed to the slider 61 by a fixing member such as a screw and extends downward from the lower end of the slider 61. Each pressure member 74 is configured to press the piston 42 downward. Each elastic member 76 is formed of one or more metal springs and is elastic. In each spacer 72, the upper end of each metal spring is attached to the base 73, and the lower end of each metal spring is attached to the pressure member 74. According to this structure, each elastic member 76 supports the pressure member 74, such that the pressure member 74 is movable relative to the slider 61. However, the invention is not limited thereto. For example, each spacer 72 may include only the elastic member 76. In this case, the lower end of each elastic member 76 serves as the pressure member 74.

[0066] Each pressurizing part 74 in this embodiment can move in the vertical direction. However, the invention is not limited thereto. For example, see... Figure 14The variant shown has each pressurizing part 74 that can move in the front-to-back direction.

[0067] refer to Figure 2 and Figure 3 In this embodiment, all punches 64 and all spacers 72 are directly fixed to a single slider 61 and protrude downward from the single slider 61. In this embodiment, all retainers 65 are indirectly fixed to the single slider 61 via resilient retainer support members 66 and protrude downward from the single slider 61. Therefore, by moving only the single slider 61 in the vertical direction, all punches 64, all retainers 65, and all spacers 72 move in the vertical direction.

[0068] Each workpiece processing group 12 in this embodiment has the above-described structure. According to this structure, all punches 64, all retainers 65, and all spacers 72 can move simultaneously via a common sliding member 61 attached to a power unit (not shown), thereby reducing the size of the workpiece processing apparatus 10. However, the invention is not limited thereto. For example, each of the punches 64, retainers 65, and spacers 72 can be fixed to one of a plurality of power units (not shown) that operate independently of each other, such that each of the punches 64, retainers 65, and spacers 72 can move in the vertical direction. Furthermore, there are no specific limitations on the structure used to support the retainers 65. The retainer support member 66 is not limited to a metal spring, as long as the retainer support member 66 is elastic. Similarly, each elastic member 76 is not limited to a metal spring.

[0069] The processing steps performed by the first group 12F, which is one of the workpiece processing groups 12 in this embodiment, will be described below. The description below applies to each of the second group 12S and the third group 12T.

[0070] refer to Figure 5 and Figure 9 Punch 64 can be used as Figure 5 The initial position of the opening 52, which is away from the workpiece machining chamber 51, is shown, and as... Figure 9 The punch 64 shown is partially received through the opening 52 of the workpiece processing chamber 51 and moves between received positions within the workpiece processing chamber 51. In this embodiment, the initial position is above the received position. The punch 64 in this embodiment moves according to the slider 61... Figure 5 The upper position shown and Figure 9 The lower positions shown are moved vertically between the initial position and the received position. However, the invention is not limited thereto. For example, the punch 64 can directly receive force from a power unit (not shown) to move vertically between the initial position and the received position.

[0071] See Figure 5 and Figure 7 Based on the vertical movement of the slider 61, the spacer 72 in this embodiment moves together with the punch 64 in the vertical direction. When the punch 64 moves from... Figure 5 The initial position shown is moved to Figure 7 In the intermediate position shown, the pressurized portion 74 of the spacer 72 contacts the pressurized portion 46 of the piston 42. (Reference) Figure 7 When the pressurizing part 74 contacts the pressurized part 46, the punch 64 is positioned above the opening 52 of the workpiece processing chamber 51. At this time, the liquid level 58 of the liquid 50L is positioned below the opening 52. Therefore, the liquid 50L is maintained in the hydraulic chamber 50.

[0072] According to this embodiment, while the spacer 72 is in contact with the piston 42, the lower end of the retainer 65 is in contact with the object 80. However, the invention is not limited thereto. For example, the lower end of the retainer 65 may be in contact with the object 80 before the spacer 72 is in contact with the piston 42.

[0073] refer to Figures 7 to 9 When the punch head 64 from Figure 7 The middle position shown Figure 9 As the receiving position shown moves continuously, the punch 64 moves to... Figure 8 The machining start position is shown. During the movement of the punch 64 from the intermediate position to the machining start position, the retainer support member 66 presses the retainer 65 against the workpiece 80 while being elastically compressed. Therefore, the punch 64 moves downward relative to the retainer 65. When the punch 64 reaches the machining start position, the lower end of the punch 64 is located at the same position as the lower end of the retainer 65 and is in contact with the workpiece 82 of the workpiece 80.

[0074] refer to Figure 8 as well as Figure 11 and 12 When the punch 64 moves to Figure 8 At the indicated machining start position, the retainer 65 applies a force generated by the restoring force of the retainer support member 66 to the outer periphery of the workpiece 82 in the XY plane. The retainer 65 presses the outer periphery of the workpiece 82 against the upper end face of the mold 30 of the base member 20F in the XY plane. The workpiece 82 pressed against the base member 20F, together with the retainer 65 and the base member 20F, forms a closed space 59 including the recess 32.

[0075] See Figure 7 and Figure 8 , from the 64th ram Figure 7 The middle position shown is moved to Figure 8During the processing at the indicated starting position, the elastic member 76 of the spacer 72, while being elastically compressed, presses the pressure part 74 against the piston 42. Therefore, the piston 42 is pushed into the hydraulic generation chamber 53. The pushed piston 42 moves into the hydraulic generation chamber 53. Consequently, the liquid level 58 of the liquid 50L rises, and the liquid 50L contacts the lower surface of the workpiece 82 of the object 80 and fills the interior of the enclosed space 59 (see...). Figure 12 The liquid 50L is contained within the enclosed space 59 and does not leak to the outside of the enclosed space 59.

[0076] refer to Figure 5 , Figure 8 and Figure 9 When the opening 52 of the workpiece processing chamber 51 is covered by the workpiece 82 of the object 80, when the punch 64 exits from... Figure 5 The initial position shown is moved to Figure 9 When the punch 64 is in the receiving position as shown, it presses the workpiece 82 into the workpiece processing chamber 51. Specifically, when the punch 64 moves from... Figure 8 During the movement from the processing start position to the receiving position, the punch 64 presses the workpiece 82 into the workpiece processing chamber 51. Thus, the workpiece 82 is partially received in the workpiece processing chamber 51 while deforming and pushing the liquid surface 58 of the opening 52 downwards.

[0077] At the 64th striker Figure 8 The processing start position shown is towards Figure 9 During the movement of the received position as shown, the pressurizing portion 74 of the spacer 72 continuously applies pressure PP to the piston 42 via the elastic member 76. Therefore, an active hydraulic counterpressure OP (hereinafter referred to as "hydraulic counterpressure OP") is generated, for example, approximately 30 to 60 MPa. As described above, when the hydraulic chamber 50 is filled with liquid 50L, the piston 42 moves from the piston 64... Figure 5 During the movement from the initial position to the received position, piston 42 is subjected to pressure PP via elastic member 76 toward hydraulic generation chamber 53, and piston 42 moves according to pressure PP, increasing the hydraulic pressure of liquid 50L. Punch 64 continuously presses against workpiece 82 against this hydraulic counter-pressure OP, thereby stretching workpiece 82.

[0078] The hydraulic pressure generated according to this embodiment can be adjusted by the spring force of the elastic member 76, more specifically, by the elastic modulus of the metal spring. Therefore, excessive hydraulic pressure can be prevented. Thus, the elastic member 76 serves as a hydraulic pressure regulating mechanism.

[0079] In summary, in this embodiment, the piston 42 moves according to the pressure PP applied via the elastic member 76, increasing the hydraulic pressure of the liquid 50L in the hydraulic chamber 50. According to this structure, when the hydraulic pressure in the hydraulic chamber 50 exceeds a predetermined value, the piston 42 cannot move into the hydraulic generation chamber 53. Therefore, by using the elasticity of the elastic member 76, excessive increase in hydraulic pressure can be prevented without providing a pressure reducing valve. Furthermore, since the liquid 50L is maintained in the hydraulic chamber 50 through a structure without a pressure reducing valve, the liquid 50L does not need to be supplied from an external source. Therefore, a complex hydraulic control mechanism including a pump and a pressure reducing valve is not required. This embodiment provides a novel workpiece processing apparatus 10, configured to process the workpiece 82 of the object 80 using hydraulic pressure, and has a simpler structure.

[0080] The workpiece processing apparatus 10 of this embodiment is particularly suitable for processing small parts such as the housing (not shown) of a connector (not shown), which are configured to be integrated into an electronic device (not shown). For example, the workpiece processing apparatus 10 can shape a workpiece 82 having a size of about a few millimeters into a desired shape. However, the invention is not limited thereto. For example, the size of the object 80 is not particularly limited.

[0081] refer to Figure 5 , Figure 8 and Figure 9 According to this embodiment, when the hydraulic chamber 50 is filled with liquid 50L and the workpiece 82 of the object 80 is as follows... Figure 5 As shown, when placed on the workpiece processing chamber 51, the sliding member 61 moves from... Figure 5 The upper position shown is towards Figure 9 When the lower position is moved as shown, the punch 64 moves downward and presses the workpiece 82 into the workpiece processing chamber 51, and the piston 42 moves downward according to the pressure PP and increases the hydraulic pressure of the liquid 50L. In this embodiment, the piston 42 receives the downward pressure PP from the slider 61 via the elastic member 76 during the movement of the slider 61 from the upper position to the lower position. However, the invention is not limited thereto.

[0082] For example, refer to Figure 13 and Figure 14 The illustrated variant shows a workpiece processing apparatus 10A that includes an additional sliding member 61A in addition to the sliding member 61. The additional sliding member 61A moves in the front-back direction in coordination with the vertical movement of the sliding member 61. Based on the forward movement of the additional sliding member 61A, the piston 42 of this variant receives a forward pressure PP via the elastic member 76 from the additional sliding member 61A. The piston 42 of this variant also moves according to the pressure PP applied via the elastic member 76, increasing the hydraulic pressure of the fluid 50L in the hydraulic chamber 50A.

[0083] See Figure 5 According to this embodiment, when the slider 61 is located at Figure 5 In the upper position shown, the first distance (i.e., the vertical distance between the lower end of the punch 64 and the workpiece 82 of the object 80) is greater than the second distance (i.e., the vertical distance between the lower end of the spacer 72 and the upper end of the piston 42). Reference Figure 5 and Figure 8 According to this arrangement, the piston 42 is subjected to pressure PP before the punch 64 begins processing the workpiece 82. However, the invention is not limited to this. For example, the first distance may be smaller than the second distance. In this case, after the punch 64 begins processing the workpiece 82, the piston 42 is subjected to pressure PP and generates hydraulic back pressure OP.

[0084] See Figure 8 In this embodiment, the piston 42 receives pressure PP from the slider 61 via the spacer 72. However, the invention is not limited thereto. For example, when the spacer 72 is not provided, the slider 61 may have an elastic portion. The piston 42 may then receive pressure PP from the elastic portion of the slider 61.

[0085] refer to Figure 5 , Figure 7 and Figure 8 According to this embodiment, when the slider 61 moves downward with the workpiece 82 placed on the workpiece processing chamber 51, the retainer 65 moves downward and presses the workpiece 82 against the base member 20F. According to this mechanism, the workpiece 82 can be stretched without wrinkling. According to this embodiment, the retainer 65 presses the workpiece 82 before the punch 64 begins processing. However, the invention is not limited thereto. For example, the retainer 65 can press the workpiece 82 after the punch 64 begins processing. More specifically, when the slider 61 is located... Figure 5 In the upper position shown, the punch 64 can protrude slightly downwards beyond the lower end of the retainer 65. Furthermore, as previously mentioned, the retainer 65 can be provided as needed.

[0086] refer to Figure 11 and Figure 12 In this embodiment, the opening 57 of the branch channel 56 is open in the enclosed space 59. When the retainer 65 presses the workpiece 82 against the base member 20F, the opening 57 of the branch channel 56 is located below the retainer 65 in the vertical direction and outside the periphery 84 of the workpiece 82 in the XY plane.

[0087] When piston 42 is pressed into hydraulic generation chamber 53, liquid 50L fills enclosed space 59 and applies peripheral hydraulic pressure PP to the periphery 84 of workpiece 82. Workpiece 82 is pushed into workpiece processing chamber 51 by peripheral hydraulic pressure PP. According to this mechanism, workpiece 82 can be easily stretched to obtain the desired shape. Furthermore, according to this embodiment, only a single sliding member 61 (see...) is used... Figure 9 Moving downwards can simultaneously generate hydraulic back pressure OP and peripheral hydraulic pressure PP. However, the invention is not limited thereto. Branch channel 56 can be configured as needed, as described above.

[0088] refer to Figure 3 The workpiece processing apparatus 10 of this embodiment includes three workpiece processing groups 12 as described above. As described below, the workpiece processing groups 12 of this embodiment generate different hydraulic pressures at different times.

[0089] refer to Figure 6 In the slider 61 from Figure 6 The upper position shown is moved to Figure 9 During the lower position shown, each piston 42 of the three workpiece processing groups 12 receives pressure PP from the spacer 72. When the slider 61 is in the upper position, each spacer 72 is separated from the piston 42 by a predetermined distance D1, D2, or D3 in the vertical direction.

[0090] In this embodiment, the predetermined distances D1, D2, and D3 are different from each other. From this distance condition, it can be seen that the piston 42 in this embodiment receives pressure PP from the spacer 72 at different times (see...). Figure 8 However, the invention is not limited thereto. For example, two of the three predetermined distances D1, D2, and D3 may be equal to each other. Therefore, at least one of the predetermined distances D1, D2, and D3 may be different from the remaining one of the predetermined distances D1, D2, and D3. In other words, at least one of the pistons 42 may receive pressure PP from the slider 61 at a different time than the time when the remaining one of the pistons 42 receives pressure PP.

[0091] refer to Figure 2 According to this embodiment, the punches 64 of the three workpiece processing groups 12 have the same diameter as each other. (See reference...) Figure 6 The bodies 44 of pistons 42 in workpiece processing groups 12F and 12S have the same diameter in the XY plane, and thus have the same cross-sectional area in the XY plane. Conversely, the body 44 of piston 42 in workpiece processing group 12T has a different cross-sectional area in the XY plane than the bodies 44 of pistons 42 in workpiece processing groups 12F and 12S. Therefore, the cross-sectional area of ​​at least one body 44 is different from the other cross-sectional areas of the remaining body 44 in the XY plane.

[0092] According to this embodiment, workpiece processing groups 12F and 12S generate the same hydraulic pressure, but workpiece processing group 12T generates a different hydraulic pressure than workpiece processing groups 12F and 12S. However, the invention is not limited thereto. For example, the bodies 44 of the three workpiece processing groups 12 may have different cross-sectional areas in the XY plane. Therefore, the three workpiece processing groups 12 may generate different hydraulic pressures.

[0093] According to this embodiment, at a predetermined time, the hydraulic pressure of at least one workpiece processing group 12 differs from that of the remaining workpiece processing group 12. See also Figure 9 In this embodiment, the predetermined time is the time when workpiece 82 is processed.

[0094] See Figure 3 According to this embodiment, the workpiece processing group 12F generates relatively large hydraulic pressure at an earlier time, the workpiece processing group 12S generates the same hydraulic pressure as the workpiece processing group 12F at a later time, and the workpiece processing group 12T generates relatively small hydraulic pressure at an even later time.

[0095] refer to Figure 4 The workpiece processing apparatus 10 of this embodiment includes three workpiece processing groups 12 as described above, and can perform deep drawing processing on one of the workpieces 82 through three processing steps, all using hydraulic pressure. In other words, the workpiece processing apparatus 10 of this embodiment is a deep drawing processing apparatus. The workpiece processing apparatus 10 can progressively process a workpiece 82 by sequentially conveying the object 80 along the channel 18 (see...). Figure 1 For example, workpiece processing group 12F can perform stretching, workpiece processing group 12S can perform deeper stretching, and workpiece processing group 12T can perform final stretching, thereby preventing springback. Optionally, different processing can be performed on three workpieces 82 simultaneously. Furthermore, another workpiece processing group 12 can be provided to cut workpieces 82 from the carrier 81 (see...). Figure 1 ).

[0096] refer to Figure 1 To illustrate the structure of the workpiece processing apparatus 10 in this embodiment from another perspective, the workpiece processing apparatus 10 includes a main component (partial device) 11 and a sliding member 61. In this embodiment, the main component 11 includes all components of the workpiece processing apparatus 10 except for the sliding member 61. The main component 11 is configured to form the workpiece processing apparatus 10 together with the sliding member 61, and the workpiece processing apparatus 10 is configured to use hydraulic pressure to process the workpiece 82 of the object 80. Therefore, the main component 11 is a partial device 11 of the workpiece processing apparatus 10. In other words, the workpiece processing apparatus 10 includes a partial device 11 that functions as the main component 11 of the workpiece processing apparatus 10.

[0097] The main component 11 in this embodiment includes at least a base component 20 and a punch 64 (see...). Figure 2 ), retainer 65 (see Figure 2 ), retainer support component 66 (see Figure 2 ), spacer 72 (see Figure 3 ) and piston 42 (see Figure 3 Each component of the main component 11 has the structure already described and operates as described. For example, when the workpiece processing apparatus 10 is formed, the sliding member 61 is positioned above the base component 20 in the vertical direction and can... Figure 5 The upper position shown and Figure 9 The lower positions shown can move vertically. The punch 64, retainer 65, and spacer 72 can be attached to the slider 61. When the punch 64 is attached to the slider 61, the punch 64 protrudes downward from the slider 61 and moves vertically according to the vertical movement of the slider 61.

[0098] refer to Figure 2 Besides the variations already described, the workpiece processing apparatus 10 of this embodiment can be modified in various ways. For example, the three workpiece processing components 62 of this embodiment have the same shape as each other. However, the invention is not limited thereto. For example, the three punches 64 may have different diameters. In this case, the workpiece processing chamber 51 (see...) Figure 5 It may have an inner diameter corresponding to the punch 64.

Claims

1. A workpiece processing apparatus configured to use hydraulic pressure to process a workpiece, wherein: The workpiece processing device includes a main component; The main component includes a base component, a punch, and a piston; The base component has a hydraulic chamber; The hydraulic chamber can be filled with liquid; The hydraulic chamber includes a workpiece processing chamber and a hydraulic generation chamber; The workpiece processing chamber and the hydraulic generation chamber are combined together and each has an opening; The openings open outward from the base component at different locations from each other; The punch is movable between an initial position away from the opening of the workpiece processing chamber and a received position in the workpiece processing chamber where the punch is partially received through the opening of the workpiece processing chamber. With the workpiece covering the opening of the workpiece processing chamber, when the punch moves from the initial position to the receiving position, the punch presses the workpiece into the workpiece processing chamber. The piston is partially received in the hydraulic generation chamber through an opening in the hydraulic generation chamber, such that the piston can move within the hydraulic generation chamber and partially protrude from the hydraulic generation chamber; When the hydraulic chamber is filled with liquid, during the movement of the punch from the initial position to the receiving position, the piston receives pressure via an elastic member toward the hydraulic generating chamber, and the piston moves according to the pressure and increases the hydraulic pressure of the liquid; The base component is formed by combining an upper component, a lower component, a mold, and a cylindrical component. The upper component is placed on the lower component in the vertical direction; Each of the mold and the cylindrical component has an upper end face that protrudes upward from the upper component; Each of the mold and the cylindrical component has a central hole; The workpiece processing chamber extends through the central hole of the mold; and The hydraulic generating chamber extends through the central hole of the cylindrical component.

2. The workpiece processing apparatus according to claim 1, wherein: The workpiece processing device includes a sliding component; The slider is located above the base component in the vertical direction and can move vertically between the upper and lower positions; The punch protrudes downward from the slider and moves vertically in accordance with the vertical movement of the slider. The workpiece processing chamber and the hydraulic generation chamber extend in the vertical direction and open upwards, respectively; The piston is partially received in the hydraulic generating chamber, allowing the piston to move in the vertical direction and protrude upward from the hydraulic generating chamber; During the movement of the slider from the upper position to the lower position, the piston receives downward pressure from the slider; and With the hydraulic chamber filled with liquid and the workpiece placed on the workpiece processing chamber, when the slider moves from the upper position to the lower position, the punch moves downward and presses the workpiece into the workpiece processing chamber, and the piston moves downward according to the pressure and increases the hydraulic pressure of the liquid.

3. The workpiece processing apparatus according to claim 2, wherein: The workpiece processing device includes two or more workpiece processing groups; Each of the workpiece processing groups includes the hydraulic chamber, the piston, and the punch; All punches protrude downwards from a single sliding member; and At a predetermined time, the hydraulic pressure of at least one of the workpiece processing groups is different from that of the remaining workpiece processing group.

4. The workpiece processing apparatus according to claim 3, wherein, At least one of the pistons receives pressure from the slider at a different time than the time when the remaining one of the pistons receives pressure.

5. The workpiece processing apparatus according to claim 3, wherein: Each of the aforementioned workpiece processing groups includes spacers; All spacers protrude downward from the single slider; During the movement of the slider from the upper position to the lower position, each piston receives pressure from the spacer; When the slider is in the upper position, each spacer is separated from the piston by a predetermined distance in the vertical direction; and At least one of the predetermined distances is different from the remaining one of the predetermined distances.

6. The workpiece processing apparatus according to claim 5, wherein: Each of the spacers includes a pressurizing portion and the elastic component; Each of the pressurizing sections is configured to press the piston downwards; and Each of the elastic components is elastic and supports the pressurizing part, allowing the pressurizing part to move relative to the slider.

7. The workpiece processing apparatus according to claim 3, wherein: Each of the pistons has a body; Each of the said bodies is partially received in the hydraulic generation chamber; and At least one of the main bodies has a cross-sectional area in a plane perpendicular to the vertical direction that is different from the cross-sectional area of ​​the other main body.

8. The workpiece processing apparatus according to any one of claims 2 to 7, wherein: The main component includes a retainer and a retainer support component; The retainer is located outside the punch in a horizontal plane perpendicular to the vertical direction; The retainer support member is elastic and supports the retainer, allowing the retainer to move relative to the slider; and With the workpiece placed on the workpiece processing chamber, when the sliding member moves downward, the retaining member moves downward and presses the workpiece against the base component.

9. The workpiece processing apparatus according to claim 8, wherein: The hydraulic chamber has branch passages; The branch channel branches off from the workpiece processing chamber and has an opening that opens outward from the base component; and When the retainer presses the workpiece against the base component, the opening of the branch channel is located below the retainer in the vertical direction and outside the periphery of the workpiece in the horizontal plane.

10. A main component configured to form a workpiece processing apparatus together with a sliding member, the workpiece processing apparatus being configured to process a workpiece object using hydraulic pressure, wherein: The main component includes a base component, a punch, and a piston; When the workpiece processing device is formed, the sliding member is located above the base component in the vertical direction and is able to move in the vertical direction between the upper position and the lower position; The punch can be attached to the slider; When the punch is attached to the slider, the punch protrudes downward from the slider and moves in the vertical direction according to the movement of the slider in the vertical direction; The base component has a hydraulic chamber; The hydraulic chamber can be filled with liquid; The hydraulic chamber includes a workpiece processing chamber and a hydraulic generation chamber; The workpiece processing chamber and the hydraulic generation chamber are combined together and each has an opening; The openings open outward from the base component at different locations from each other; The workpiece processing chamber and the hydraulic generation chamber extend in the vertical direction and open upwards, respectively; The piston is partially received in the hydraulic generating chamber, enabling the piston to move in the vertical direction and protrude upward from the hydraulic generating chamber; During the movement of the slider from the upper position to the lower position, the piston receives downward pressure from the slider via the elastic member; With the hydraulic chamber filled with liquid and the workpiece placed on the workpiece processing chamber, when the sliding member moves from the upper position to the lower position, the punch moves downward and presses the workpiece into the workpiece processing chamber, and the piston moves downward according to the pressure and increases the hydraulic pressure of the liquid; The base component is formed by combining an upper component, a lower component, a mold, and a cylindrical component. The upper component is placed on the lower component in the vertical direction; Each of the mold and the cylindrical component has an upper end face that protrudes upward from the upper component; Each of the mold and the cylindrical component has a central hole; The workpiece processing chamber extends through the central hole of the mold; and The hydraulic generating chamber extends through the central hole of the cylindrical component.

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