Die for part former

Abstract

To apply a pressing force to a workpiece from an intersection direction intersecting one direction which is a moving direction of a movable die.SOLUTION: A die for a part former includes: a fixed die to which a workpiece is pressed from one side in one direction and which has pressing members capable of pressing the workpiece which is moved in an intersection direction intersecting the one direction and pressed against the fixed die; and a movable die which moves in the one direction to press the workpiece against the fixed die and acts on the pressing members to move the pressing members in the intersection direction and cause the pressing members to press the workpiece in the intersection direction.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a mold for a parts former. [Background technology]

[0002] Patent Document 1 describes a multi-stage parts former that uses a die and a punch that moves back and forth opposite the die to sequentially press-form a material from rough to fine to form a molded product with a hole, and in the process following the process of forming the hole by forward or backward extrusion within the punch or die, a hole inspection cage pin is provided to detect folding or chipping of the punch within the formed hole. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Application No. 2002-5607 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, when a product is processed using a parts former, which is a multi-stage forging device, the supplied material is cut to a certain size and the workpiece is processed using multiple dies, each of which has a fixed die and a movable die. Specifically, the cut workpiece is transported sequentially to multiple dies, and in each die, the movable die moves in one direction relative to the fixed die to apply a pressing force to the workpiece from one direction, and the workpiece finally becomes a product.

[0005] In this way, the movable mold moves in one direction relative to the fixed mold, thereby applying a pressing force to the workpiece from one direction, and therefore, for example, it is not possible to apply a pressing force to the workpiece from a direction intersecting the one direction.

[0006] The object of the present disclosure is to apply a pressing force to a workpiece from a direction intersecting one direction that is the movement direction of the movable mold. [Means for solving the problem]

[0007] The mold for a part former according to the first aspect is characterized by comprising: a fixed mold having a pressing member against which a workpiece is pressed from one side in one direction and which can move in an intersecting direction intersecting the one direction to press the pressed workpiece; and a movable mold which moves in the one direction to press the workpiece against the fixed mold and acts on the pressing member to move the pressing member in the intersecting direction, causing the pressing member to press the workpiece in the intersecting direction.

[0008] According to the above configuration, the movable die, which moves in one direction, acts on the pressing member of the fixed die to move the pressing member in the intersecting direction. Furthermore, the pressing member moving in the intersecting direction presses the workpiece in the intersecting direction. In this way, a pressing force can be applied to the workpiece from the intersecting direction that intersects with the one direction in which the movable die moves.

[0009] The mold for a part former described in the second aspect is the mold for a part former described in the first aspect, characterized in that the pressing members are provided in pairs with the work pressed against the fixed mold between them when viewed from the one direction.

[0010] According to the above configuration, when viewed from one direction, the pair of pressing members can press the workpiece from both sides.

[0011] A third aspect of the mold for a part former is the mold for a part former of the first aspect, wherein the pressing member has a pressing surface that presses the workpiece and an inclined surface that is inclined relative to the one direction, and the movable die includes an extension member having another inclined surface that is inclined relative to the one direction and presses the inclined surface in the one direction to move the pressing member in the intersecting direction, and a pressing member that contacts the workpiece in the one direction and presses the workpiece against the fixed die, and wherein the other inclined surface of the extension member presses the inclined surface of the pressing member while the pressing member restricts the movement of the workpiece.

[0012] With the above configuration, while the pressing member restricts the movement of the workpiece, the other inclined surface of the extension member presses the inclined surface of the pressing member, thus preventing the workpiece pressed by the pressing member from moving in one direction.

[0013] A fourth aspect of the die for a part former is the die for a part former of the third aspect, characterized in that the movable die is provided with a biasing member that elastically deforms to bias the pressing member against the workpiece.

[0014] According to the above-described configuration, the biasing member elastically deforms to bias the pressing member against the workpiece, thereby effectively restricting the movement of the workpiece even if the shape of the workpiece varies in one direction.

[0015] A fifth aspect of the mold for a part former is the mold for a part former of the third aspect, wherein the pressing member is movable between an allowable position that allows the workpiece moving in one direction to face the pressing member in the intersecting direction, and a pressing position that presses the workpiece, and the fixed mold includes a biasing member that biases the pressing member to the allowable position, and when the pressing member is biased to the allowable position by the biasing member, the other inclined surface of the extension member presses the inclined surface of the pressing member.

[0016] According to the above-described configuration, the biasing member biases the pressing member to the allowable position that allows the workpiece moving in one direction to face the pressing member in the intersecting direction. This makes it possible to move the pressing member to the allowable position with a simpler configuration than when a link or the like is used to move the pressing member to the allowable position.

[0017] The mold for a part former described in a sixth aspect is the mold for a part former described in the first aspect, characterized in that the fixed mold comprises an extrusion member that extrudes the work pressed against the fixed mold toward the other side of the one direction, a pair of holding members that sandwich the work extruded by the extrusion member from another intersecting direction that intersects the one direction and the intersecting direction and maintain the posture of the work, and a biasing member that biases the holding members toward the work.

[0018] According to the above configuration, the holding member biased by the biasing member holds the workpiece pushed out by the push-out member from the other intersecting direction to maintain the position of the workpiece. As a result, even if the shape of the workpiece varies in the other intersecting direction, the position of the workpiece pushed out by the push-out member can be maintained by suppressing tilting. [Effects of the Invention]

[0019] According to the die for a part former of the present invention, a pressing force can be applied to the workpiece from a direction intersecting the one direction that is the moving direction of the movable die. [Brief explanation of the drawings]

[0020] [Figure 1] 4A to 4E are drawings showing the shapes of workpieces machined by each die in a part former equipped with a die for the part former according to the present embodiment. [Figure 2] FIG. 2 is a side view of a mold for a part former according to the present embodiment, showing the mold in an open state. [Figure 3] 10A and 10B are side views of the mold for the part former according to the embodiment, illustrating a process in which the movable mold moves toward the fixed mold. [Figure 4] FIG. 10 is a side view of the mold for the part former according to the embodiment, showing a state in which a workpiece is pressed into the fixed mold while the movable mold is moving toward the fixed mold. [Figure 5]FIG. 10 is a side view of the mold for the part former according to the embodiment, showing a state in which the extension member of the movable mold comes into contact with the pressing member of the fixed mold as the movable mold moves toward the fixed mold. [Figure 6] FIG. 2 is a side view of a mold for a part former according to the present embodiment, showing the mold in a clamped state. [Figure 7] FIG. 2 is a side view of the mold for the part former according to the present embodiment, showing the mold opened and the workpiece pushed out. [Figure 8] FIG. 2 is an exploded perspective view showing an extension member and a pressing member provided in the mold for the part former according to the embodiment. [Figure 9] 1A and 1B are a front view and a plan view of a mold for a part former according to this embodiment, showing a state in which a workpiece is pressed into the fixed mold as the movable mold moves toward the fixed mold. [Figure 10] 1A and 1B are a front view and a plan view of a mold for a part former according to the present embodiment, showing the mold in a clamped state. [Figure 11] FIG. 2 is a plan view of a mold for a part former according to the present embodiment, showing a state in which the mold is opened and a workpiece is pushed out. [Figure 12] FIG. 10 is a side view of a transport unit of a part former equipped with a die for the part former according to the present embodiment, showing a state in which the transport unit receives a workpiece. [Figure 13] FIG. 1 is a side view of a transport unit of a part former equipped with a die for the part former according to the present embodiment, showing a state in which a workpiece is rotated. [Figure 14] FIG. 1 is a front view of a transfer unit of a part former equipped with a die for the part former according to the present embodiment, showing a state in which the transfer unit receives a workpiece. [Figure 15] FIG. 1 is a front view of a transport unit of a part former equipped with a die for the part former according to the present embodiment, showing a state in which a workpiece is rotated. [Figure 16]FIG. 10 is a side view of another mold included in the part former equipped with the mold for the part former according to the present embodiment, showing the other mold in an open state. DETAILED DESCRIPTION OF THE INVENTION

[0021] An example of a part former die according to an embodiment of the present disclosure will be described with reference to Figures 1 to 16. Arrow H in each figure indicates the vertical direction, i.e., the up-down direction of the part former die, arrow W in each figure indicates the width direction of the part former die, is perpendicular to arrow H and indicates the horizontal direction, and arrow D in each figure indicates the depth direction of the part former die, is perpendicular to arrows H and W and indicates the horizontal direction.

[0022] The drawings used in the following description are all schematic, and the dimensional relationships between elements, ratios, etc. shown in the drawings do not necessarily correspond to the actual ones.

[0023] The die for a part former according to this embodiment is composed of a movable die and a fixed die, and is used to process a cylindrical metal workpiece into a brake hose fitting as a product. Here, the part former is a horizontal multi-stage forging device that cuts a supplied material to a set size, sequentially transports the cut workpiece between multiple opposing movable and fixed dies, and is a horizontal press machine that applies a pressing force to the workpiece with the movable and fixed dies to form the product.

[0024] In this embodiment, the movable die and the fixed die are arranged facing each other in the depth direction, and the movable die moves toward the rear and front in the depth direction. Furthermore, multiple dies are provided, and the multiple dies are arranged in the width direction. That is, a transport unit provided in the part former for transporting a workpiece from one die to another moves the workpiece in the width direction so that the workpiece machined by the die in the previous process can be machined by the die in the next process.

[0025] (Processing process from workpiece to brake hose fitting) 1(A) to 1(E) show the workpieces machined in each process in order from left to right on the page. Arrows H, W, and D in Fig. 1 indicate the direction of the workpiece when machined by the part former die. The following explanation of the shape of the workpiece will be given using the direction when the workpiece is machined by the part former die.

[0026] For the workpieces in each process, the shape of the workpiece as viewed from above is shown in the vertical center of the paper, the shape of the front part of the workpiece in the depth direction as viewed from the front side in the depth direction is shown at the top of the paper, and the shape of the back part of the workpiece in the depth direction as viewed from the back side in the depth direction is shown at the bottom of the paper.

[0027] FIG. 1(A) shows a workpiece 200 before machining, which has a cylindrical shape extending in the depth direction.

[0028] 1(B) shows workpiece 210 after workpiece 200 has been machined in multiple steps, and workpiece 210 includes a spherical portion 210a and a rectangular parallelepiped portion 210b connected to spherical portion 210a. Specifically, spherical portion 210a and rectangular parallelepiped portion 210b are aligned from the front side to the back side in the depth direction.

[0029] 1(C) shows workpiece 220 after workpiece 210 has been machined. Workpiece 220 includes an oblate spherical portion 220a and a rectangular parallelepiped portion 220b connected to oblate spherical portion 220a. Specifically, oblate spherical portion 220a and rectangular parallelepiped portion 220b are aligned from the front side to the back side in the depth direction. Furthermore, oblate spherical portion 220a is formed with a pair of circular flat portions 220c facing up and down.

[0030] 1(D) shows workpiece 230 after workpiece 220 has been machined. Workpiece 230 includes an oblate spherical portion 230a and a rectangular parallelepiped portion 230b connected to oblate spherical portion 230a. Specifically, oblate spherical portion 230a and rectangular parallelepiped portion 230b are aligned from the front side to the back side in the depth direction. A pair of circular recesses 230c recessed in the vertical direction are formed in oblate spherical portion 230a.

[0031] 1(E) shows a product 240 obtained after workpiece 230 has been machined through multiple steps. Product 240 includes an oblate spherical portion 240a and a rectangular parallelepiped portion 240b connected to oblate spherical portion 240a. Specifically, oblate spherical portion 240a and rectangular parallelepiped portion 240b are aligned from the front to the back in the depth direction. Further, oblate spherical portion 240a has a through-hole 240c formed therethrough in the vertical direction.

[0032] (Configuration of mold 10 for parts former) Next, a description will be given of a mold 10 (hereinafter simply referred to as "mold 10") for a part former that processes a workpiece 210 to produce a workpiece 220. As shown in FIG. 2, the mold 10 includes a movable mold 10a and a fixed mold 10b that are arranged to face each other in the depth direction. A driving force is transmitted from a driving source (not shown) to the movable mold 10a, which moves in the depth direction, thereby pressing the workpiece 210 against the fixed mold 10b, thereby processing the workpiece 210. Note that FIG. 2 shows the mold 10 in an open state.

[0033] [Mobile type 10a] The movable die 10a is a so-called punch, and is disposed on the front side in the depth direction relative to the fixed die 10b, as shown in Fig. 2. The movable die 10a includes a main body 12, a pressing pin 14, a biasing member 16, and a pair of extension members 18. The pressing pin 14 is an example of a pressing member.

[0034] -Main body 12, pressing pin 14, biasing member 16- As shown in Figure 2, the main body 12 is shaped like a rectangular parallelepiped extending in the depth direction, and the main body 12 is formed with a hollow portion 12a extending in the depth direction, a top surface 12b facing the back side of the main body 12 in the depth direction, and a communication hole 12c connecting the top surface 12b and the hollow portion 12a.

[0035] The pressing pin 14 extends in the depth direction, and an expanded diameter portion 14a, which is expanded in diameter relative to the general portion, is formed at the base end of the pressing pin 14 on the front side in the depth direction. Specifically, the pressing pin 14 extends on a center line CL01 extending in the depth direction of the mold 10. The expanded diameter portion 14a of the pressing pin 14 is disposed in the hollow portion 12a, and the pressing pin 14 extends from the expanded diameter portion 14a to the rear side in the depth direction, passes through the communicating hole 12c, and protrudes from the top surface 12b toward the fixed mold 10b.

[0036] Furthermore, a curved contact surface 14b (see FIG. 9(B)) is formed at the tip of the innermost depth direction of the pressing pin 14. This contact surface 14b conforms to the outer shape of the workpiece 220 when viewed from above.

[0037] The biasing member 16 is a so-called compression coil spring and is disposed in the hollow portion 12a so as to extend in the depth direction. Specifically, the biasing member 16 is disposed in a compressed state on the near side in the depth direction relative to the enlarged diameter portion 14a of the pressing pin 14. As a result, the biasing member 16 biases the pressing pin 14 so that the pressing pin 14 protrudes from the top surface 12b.

[0038] -Extension member 18- 2, a pair of extension members 18 are provided and attached to the top surface 12b of the main body 12. Specifically, the pair of extension members 18 are arranged to face each other on both sides in the up-down direction with the center line CL01 therebetween.

[0039] As shown in Fig. 8, the extension member 18 includes a main body 18a attached to the top surface 12b and a protruding portion 18b that protrudes from the main body 18a toward the rear in the depth direction and has a triangular shape when viewed from the width direction. Furthermore, an inclined surface 18c that is inclined with respect to the depth direction is formed on the protruding portion 18b. Specifically, the inclined surface 18c is inclined with respect to the depth direction when viewed from the width direction so that the portion on the front side in the depth direction when viewed from the width direction is closer to the center line CL01 than the portion on the rear side in the depth direction. Note that Fig. 8 shows the extension member 18 disposed on the lower side. The inclined surface 18c is an example of another inclined surface.

[0040] [Fixed type 10b] The fixed mold 10b is a so-called die, and is disposed on the rear side in the depth direction relative to the movable mold 10a, as shown in Fig. 2. The fixed mold 10b includes a main body 32, an ejector pin 34, a pressing member 36, a biasing member 38 (see Fig. 9(A)), a holding member 40 (see Fig. 9(B)), and a biasing member 42 (see Fig. 9(B)). The ejector pin 34 is an example of a biasing member.

[0041] -Main body 32, ejector pin 34- As shown in FIG. 2, the main body 32 is formed with a rectangular recess 32a that is open toward the front in the depth direction. The recess 32a has a pair of opposing surfaces 32c that face each other in the vertical direction and a pair of opposing surfaces 32d that face each other in the width direction (see FIG. 9(B)). Furthermore, a through-hole 32f extending in the depth direction is formed in the bottom 32e of the main body 32 on the far side in the depth direction. This through-hole 32f penetrates a cavity 48 formed between the bottom 32e of the main body 32 and a base (reference numeral omitted) and the recess 32a of the main body 32, has a rectangular shape when viewed in the depth direction, and extends on a center line CL01. As will be described in detail later, a rectangular parallelepiped portion 210b of the workpiece 210 is adapted to be inserted into the through-hole 32f.

[0042] The ejector pin 34 extends in the depth direction, and an expanded diameter portion 34a, which is larger in diameter than the general portion, is formed at the base end of the ejector pin 34 on the rear side in the depth direction. Specifically, the ejector pin 34 extends on the center line CL01. The expanded diameter portion 34a of the ejector pin 34 is disposed in the hollow portion 48, and the ejector pin 34 extends from the expanded diameter portion 34a to the front side in the depth direction, passes through the through hole 32f, and protrudes from the bottom portion 32e toward the movable mold 10a. The ejector pin 34 is movable in the depth direction, and when the workpiece 220 machined by the mold 10 is pushed forward in the depth direction, a driving force is transmitted from a driving source (not shown) to the ejector pin 34, which moves the ejector pin 34 from the rear side to the front side in the depth direction.

[0043] -Pressing member 36, biasing member 38- As shown in Fig. 2, a pair of pressing members 36 are provided and are arranged to face each other in the vertical direction in the recess 32a of the main body 32. Specifically, the pair of pressing members 36 are arranged to face each other on both sides in the vertical direction with the center line CL01 between them. When viewed in the width direction, the pressing member 36 has a rectangular shape extending in the vertical direction. When the mold is opened, the base end of the pressing member 36 contacts the opposing surface 32c of the main body 32.

[0044] As shown in FIG. 8, an opening 36a is formed at the base end portion of the pressing member 36, which is open on the opposing surface 32c (see FIG. 2) side. Furthermore, a pressing surface 36b protruding toward the center line CL01 and a stepped surface 36c sandwiching the pressing surface 36b in the width direction and recessed relative to the pressing surface 36b are formed at the tip end portion of the pressing member 36. Furthermore, an inclined surface 36d inclined relative to the depth direction is formed at the base end portion of the pressing member 36 so as to form the opening 36a. Specifically, the inclined surface 36d is inclined relative to the depth direction as viewed in the width direction so that the rear portion in the depth direction is farther away from the center line CL01 than the front portion in the depth direction when viewed in the width direction. Note that FIG. 8 also shows the extension member 18 disposed on the lower side.

[0045] 9A, the main body 32 is further formed with an opposing surface 32g that faces the stepped surface 36c of the pressing member 36 in the vertical direction, and a biasing member 38 is disposed between the stepped surface 36c and the opposing surface 32g. The biasing member 38 is a so-called compression coil spring and is disposed so as to extend in the vertical direction. As a result, the biasing member 38 biases the pressing member 36 so that the base end of the pressing member 36 comes into contact with the opposing surface 32c of the main body 32, as shown in FIG.

[0046] In this configuration, as shown in Fig. 2, the biasing member 38 biases the pressing member 36 so that the base end of the pressing member 36 contacts the opposing surface 32c of the main body 32, thereby positioning the pressing member 36 at an allowable position that allows the workpiece 210 moving in the depth direction to face the pressing member 36 in the up-down direction. On the other hand, when the movable mold 10a moves toward the back in the depth direction, the inclined surface 18c of the extension member 18 presses the inclined surface 36d of the pressing member 36. As a result, the pressing member 36 moves to a pressing position (see Fig. 6) where the pressing surface 36b presses the spherical portion 210a of the workpiece 210 from both the up-down direction and the down-down direction. The up-down direction is an example of an intersecting direction.

[0047] -Retaining member 40, biasing member 42- 9(A) and 9(B), a pair of holding members 40 are provided and are arranged to face each other in the width direction in the recess 32a of the main body 32. Specifically, the pair of holding members 40 are arranged to face each other on both sides in the width direction with the center line CL01 therebetween. Furthermore, as shown in FIG. 9(A), the holding members 40 extend in the width direction when viewed from the depth direction.

[0048] Furthermore, an expanded portion 40a expanding in the vertical direction is formed at the base end portion of the holding member 40, and an opposing surface 32h opposing the expanded portion 40a in the width direction is formed on the main body 32. Furthermore, a curved contact surface 40b that contacts the workpieces 210, 220 is formed at the tip portion of the holding member 40 and extends in the depth direction. Specifically, when viewed from the depth direction, the contact surface 40b follows the oblate spherical portion 220a of the workpiece 220. In other words, when viewed from the depth direction, the contact surface 40b follows the outer shape of the workpiece 220.

[0049] In addition, a biasing member 42 is disposed between the opposing surface 32d formed on the main body 32 and the base end portion of the holding member 40. The biasing member 42 is a so-called compression coil spring and is disposed so as to extend in the width direction. As a result, the biasing member 42 biases the holding member 40 so that the expanding portion 40a of the holding member 40 comes into contact with the opposing surface 32h of the main body 32.

[0050] (Action of mold 10) Next, a machining operation when the die 10 is used to machine the workpiece 210 (see FIG. 1(B)) into the workpiece 220 (see FIG. 1(C)) will be described.

[0051] [Mold open state] When the mold 10 is in an open state, as shown in FIG. 2, the movable mold 10a is disposed on the front side of the fixed mold 10b in the depth direction and is spaced apart from the fixed mold 10b.

[0052] In this state, in the movable mold 10a, the biasing member 16 biases the pressing pin 14 so that the pressing pin 14 protrudes from the top surface 12b. Furthermore, in the fixed mold 10b, the biasing member 38 (see FIG. 9(A)) biases the pressing member 36 so that the base end of the pressing member 36 contacts the opposing surface 32c of the main body 32. Furthermore, the ejection pin 34 protrudes into the recess 32a of the main body 32.

[0053] Then, a transport unit (not shown) that moves the workpiece 210 from the mold of the previous process to the mold 10 of the next process places the workpiece 210 on the front side in the depth direction of the ejector pin 34, as shown in Fig. 2. When the workpiece 210 is placed, the movable mold 10a moves toward the back side in the depth direction by a driving force from a driving source (not shown).

[0054] [Mold clamping and pushing process] When the movable mold 10a moves toward the rear in the depth direction, the tip of the pressing pin 14 comes into contact with the spherical portion 210a of the workpiece 210, as shown in Fig. 3. The depth direction is an example of one direction.

[0055] 4, when the movable mold 10a moves further back in the depth direction, the pressing pin 14 presses the workpiece 210 into the recess 32a of the main body 32. As a result, the spherical portion 210a of the workpiece 210 comes into contact with the edge of the through-hole 32f of the main body 32, and the rectangular parallelepiped portion 210b of the workpiece 210 is inserted into the through-hole 32f. Furthermore, the ejection pin 34 is pressed by the workpiece 210 and moves further back in the depth direction.

[0056] In this state, when viewed from the width direction, the spherical portion 210a of the workpiece 210 is disposed between the pair of pressing members 36 in the vertical direction. Furthermore, when viewed from the depth direction and the vertical direction, as shown in Figures 9(A) and (B), the spherical portion 210a of the workpiece 210 is sandwiched between the pair of holding members 40 in the width direction, and the curved contact surfaces 40b of the holding members 40 contact the spherical portion 210a of the workpiece 210 (see Figure 9(A)). The width direction is an example of another intersecting direction.

[0057] [Mold clamping and pressing process] 5, when the movable mold 10a moves further toward the rear in the depth direction, the tip of the pressing pin 14 remains in contact with the spherical portion 210a of the workpiece 210, compressing the biasing member 16. The biasing force of this biasing member 16 presses the workpiece 210 against the main body 32 of the fixed mold 10b, restricting movement of the workpiece 210 in the depth direction.

[0058] Furthermore, the protruding portion 18b of the extension member 18 enters the opening 36a of the pressing member 36 (see FIG. 8), and the inclined surface 18c of the extension member 18 comes into contact with the inclined surface 36d of the pressing member 36.

[0059] [Mold clamping and pressing process] As the movable mold 10a moves further toward the rear in the depth direction, the inclined surface 18c of the extension member 18 presses the inclined surface 36d of the pressing member 36, and as shown in FIGS. 6, 10(A), and 10(B), the pair of pressing members 36 move vertically toward each other. As a result, the pressing surfaces 36b of the pair of pressing members 36 press the spherical portion 210a from both the vertical and horizontal directions, causing the spherical portion 210a to plastically deform from a spherical shape to an oblate spheroid by expanding in the width and depth directions. In this way, the workpiece 210 (see FIG. 1(B)) is machined into a workpiece 220 (see FIG. 1(C)) having an oblate spheroid portion 220a with a flat portion 220c facing vertically.

[0060] 10(A) and 10(B), the oblate spherical portion 220a of the workpiece 220 is sandwiched between the pair of holding members 40 in the width direction, as viewed from the depth direction and the up-down direction, and the curved contact surfaces 40b of the holding members 40 are in contact with and follow the oblate spherical portion 220a of the workpiece 220. Specifically, as the spherical portion 210a expands from its spherical shape in the width direction and the depth direction, the pair of holding members 40 move in the width direction against the biasing force of the biasing member 42, moving away from each other while maintaining contact with the spherical portion 210a.

[0061] This maintains contact between the contact surfaces 40b of the holding members 40 and the oblate spherical portions 220a of the workpiece 220. Furthermore, the biasing force of the biasing members 42 presses the pair of holding members 40 against the workpiece 220, maintaining the posture of the workpiece 220.

[0062] [Mold opening and extrusion process] When the workpiece 210 is machined into the workpiece 220, the movable die 10a moves toward the front in the depth direction by a driving force from a driving source (not shown), and the movable die 10a returns to its initial position as shown in Fig. 7. Then, the biasing member 38 (see Fig. 9(A)) biases the pressing member 36 so that the base end of the pressing member 36 contacts the opposing surface 32c of the main body 32. As a result, the pressing member 36 returns to the allowable position.

[0063] Furthermore, the ejector pins 34 of the fixed mold 10b move toward the front in the depth direction by a driving force from a driving source (not shown), and the workpiece 220 is pushed out from the fixed mold 10b. Here, a pair of holding members 40 shown in FIGS. 10(A) and 10(B) sandwich the workpiece 220 pushed out from the fixed mold 10b by the ejector pins 34 from the width direction, thereby maintaining the posture of the workpiece 220. Then, the workpiece 220 pushed out from the mold 10b is gripped by the gripping members 62 of the transport unit 60. In this manner, the workpiece 220 is delivered to the transport unit 60.

[0064] (Transport unit 60) Next, the transport unit 60 that transports the workpiece 220 pushed out from the fixed die 10b to the die 110 (see FIG. 16) for the next process will be described.

[0065] As shown in FIGS. 7 and 11, the transport unit 60 has a pair of gripping members 62 that grip the workpiece 220 pushed out from the fixed die 10b from both sides in the width direction.

[0066] Specifically, as shown in Figures 12 and 14, the conveying unit 60 comprises a main body 90, a gripping member 62, a support unit 66 that supports the gripping member 62, a rotating member 70 that rotates the support unit 66, and a moving member 96 that moves the main body 90.

[0067] [Main body 90] The main body 90 is integrally formed and has a rectangular base portion 90a extending vertically when viewed in the width direction, and an extension portion 90b extending downward from the front portion of the base portion 90a in the depth direction, as shown in Fig. 12. When the main body 90 of the transport unit 60 is positioned at a receiving position where it receives the workpiece 220 from the mold 10, the extension portion 90b is arranged at the front side of the fixed mold 10b in the depth direction, as shown in Fig. 12.

[0068] 14, the extension portions 90b are provided as a pair spaced apart in the width direction when viewed from the depth direction. A support unit 66 that supports the gripping member 62 is attached to the lower end portion of the extension portion 90b.

[0069] [Support unit 66, gripping member 62] As shown in Figures 11 and 14, a pair of support units 66 are provided, one on each side in the width direction, sandwiching the workpiece 220 extruded from the fixed mold 10b. The support unit 66 includes a shaft portion 66a extending in the width direction, a C-ring 66b attached to the base end portion (the portion away from the center line CL01) of the shaft portion 66a, and an expanded diameter portion 66c formed at the tip end (the end portion on the center line CL01 side) of the shaft portion 66a and having a larger diameter than the shaft portion 66a. Furthermore, the support unit 66 includes a biasing member 66d that biases the expanded diameter portion 66c toward the workpiece 220. The shaft portion 66a is an example of a support member.

[0070] A through-hole (not shown) through which the shaft 66a passes is formed in the extension 90b of the main body 90, and the shaft 66a is supported in the through-hole so as to be rotatable in the circumferential direction. Specifically, the shaft 66a is supported in the through-hole so as to be rotatable in the circumferential direction, with the rotation axis direction being the width direction, and so as to be movable in the width direction. The width direction is an example of the rotation axis direction.

[0071] The biasing member 66d is a so-called compression coil spring, and is disposed between the expanded diameter portion 66c and the extending portion 90b. Specifically, the biasing member 66d is disposed in a compressed state, and biases the expanded diameter portion 66c toward the workpiece 220.

[0072] The gripping members 62 are plate-shaped members whose thickness direction is the width direction, and are provided as a pair facing each other in the width direction, and are attached to the tip portions (portions on the center line CL01 side) of the enlarged diameter portions 66c. The width direction is an example of the facing direction.

[0073] 12, the gripping member 62 has an arcuate surface 62a formed around the rotation center CL02 of the shaft portion 66a when viewed from the width direction. Specifically, when the main body 90 is placed at a receiving position where it receives the workpiece 220 from the mold 10, the arcuate surface 62a is formed clockwise from an upper portion in the vertical direction with respect to the rotation center CL02 to a far portion in the depth direction with respect to the rotation center CL02 of the shaft portion 66a.

[0074] [Rotating member 70] As shown in FIGS. 12 and 14, the rotating member 70 includes a link unit 72 and an operating unit 76 that operates the link unit 72.

[0075] -Link unit 72- As shown in FIGS. 12 and 14, a pair of link units 72 are provided, and are arranged on both sides in the width direction with the workpiece 220 extruded from the fixed mold 10b between them. Specifically, the link unit 72 includes a first link 72a, one end of which is attached to the shaft portion 66a, and a second link 72b, one end of which is rotatably attached to the other end of the first link 72a. When the main body 90 is positioned at a receiving position where it receives the workpiece 220 from the mold 10, the first link 72a is positioned in its initial position and is arranged to extend from one end to the front side in the depth direction, as shown in FIG. 12. In other words, the base end of the first link 72a is attached to the shaft portion 66a and extends to the opposite side of the fixed mold 10b when viewed in the width direction.

[0076] In this state, the second link 72b is disposed in its initial position and extends upward in the vertical direction from one end. Here, the C-ring 66b described above is attached to a portion of the shaft portion 66a on the outer side in the width direction (the side away from the center line CL01) of the first link 72a, as shown in FIG.

[0077] -Operating Unit 76- 12 and 14, the operating unit 76 includes a rod 76a extending in the width direction and having the other ends of the second links 72b rotatably attached to both ends thereof, and a cantilever link 76b having one end rotatably attached to the longitudinal center of the rod 76a. The operating unit 76 further includes an operating part 76c that rotates the cantilever link 76b.

[0078] When the transport unit 60 is disposed at a receiving position where it receives the workpiece 220 from the mold 10, the cantilever link 76b is disposed at its initial position and is disposed so as to extend from one end to the far side in the depth direction, as shown in Fig. 12. Furthermore, the other end of the cantilever link 76b is rotatably attached to a shaft 92 formed on a base part 90a of the main body 90.

[0079] The operating part 76c also includes a cylindrical rod 78 inserted into a through-hole (reference numeral omitted) extending in the vertical direction and formed in the base part 90a of the main body 90, and a large-diameter part 80 attached to the upper end of the rod 78 and having a larger diameter than the rod 78. When the transport unit 60 is placed at the receiving position, the lower surface of the large-diameter part 80 contacts the upper surface of the base part 90a of the main body 90 in the vertical direction.

[0080] The rod 78 is also formed with a notch 78a to avoid interference with the shaft 92 that constitutes the rotation axis of the cantilever link 76b, and a through-hole 78b (see FIG. 14) through which the cantilever link 76b passes and which penetrates in the depth direction. The rod 78 is further provided with a pin 78c that crosses the through-hole 78b in the width direction, and this pin 78c is inserted into an elongated hole 77 that is formed in the cantilever link 76b, extends in the extension direction of the cantilever link 76b, and penetrates in the width direction.

[0081] In this configuration, as shown in Figures 13 and 15, a driving force is transmitted from a driving source (not shown) to the moving part 76c, which moves upward a predetermined distance, and the lower surface of the large diameter part 80 of the moving part 76c moves away from the upper surface of the base part 90a of the main body 90. As the moving part 76c moves upward, the pin 78c that crosses the elongated hole 77 formed in the cantilever link 76b also moves upward. As the pin 78c moves upward, the cantilever link 76b rotates clockwise about the shaft part 92, and one end of the cantilever link 76b moves upward.

[0082] As one end of the cantilever link 76b moves upward, the other end of the second link 72b moves upward, and as the other end of the second link 72b moves upward, one end of the second link 72b also moves upward. As one end of the second link 72b also moves upward, the other end of the first link 72a moves upward, and the first link 72a rotates around the shaft 66a. Specifically, as viewed in the width direction, the shaft 66a rotates clockwise. As the shaft 66a rotates clockwise, the gripping member 62 rotates clockwise.

[0083] [Moving member 96] The moving member 96 moves the main body 90 in the width direction from a receiving position where the gripping member 62 receives the workpiece 220 pushed out from the fixed die 10b of the die 10 to a processing position where the workpiece 220 gripped by the gripping member 62 can be processed by the die 110 in the next process. This moving member 96 is configured by combining known mechanisms such as cams and links (not shown). In this way, the direction in which the main body 90 is moved by the moving member 96 is the width direction.

[0084] (Function of the transport unit 60) Next, a description will be given of the transport operation in which the workpiece 220 pushed out from the fixed die 10b of the die 10 is transported to the die 110 (see FIG. 16) for the next process using the transport unit 60. The die 110 is disposed adjacent to the die 10 in the width direction, and as shown in FIG. 16, includes a movable die 110a and a fixed die 110b.

[0085] [Gripping process] When the main body 90 of the conveying unit 60 is positioned at a receiving position where it receives the workpiece 220 from the mold 10, the extension portion 90b of the main body 90 is positioned on the front side of the fixed mold 10b in the depth direction, as shown in FIGS. 11 and 12. Also, as shown in FIGS. 12 and 14, the lower surface of the large-diameter portion 80 of the movable portion 76c contacts the upper surface of the base portion 90a of the main body 90 in the vertical direction. Furthermore, the first link 72a, the second link 72b, and the cantilever link 76b are positioned in their respective initial positions. In this state, as shown in FIGS. 11, 12, and 14, the workpiece 220 is pushed out of the fixed mold 10b, and the pair of gripping members 62 grip the workpiece 220 between them. Specifically, a pair of gripping members 62 are biased by the biasing force of biasing member 66d to both ends of the width direction of oblate spherical portion 220a of workpiece 220, whose flat portion 220c faces in the vertical direction, so that the pair of gripping members 62 grips workpiece 220.

[0086] [Width direction movement and rotation process] When the pair of gripping members 62 grip the workpiece 220, the moving member 96 moves the main body 90 in the width direction. Specifically, the moving member 96 moves the main body 90 to a processing position where the extension portion 90b of the main body 90 is positioned on the front side of the fixed mold 110b in the depth direction.

[0087] Here, while the main body 90 is moving, the transport unit 60 rotates the workpiece 220 held by the pair of gripping members 62. Specifically, the transport unit 60 rotates the workpiece 220, with the flat surface 220c facing the up-down direction, so that the flat surface 220c faces the depth direction.

[0088] The process of rotating the workpiece 220 will be described below. While the main body 90 is moving, the moving part 76c receives a driving force from a driving source (not shown) and moves upward by a predetermined distance, as shown in Figures 13 and 15, and the lower surface of the large diameter part 80 of the moving part 76c separates from the upper surface of the basic part 90a of the main body 90.

[0089] As the movable portion 76c moves upward, the pin 78c that crosses the elongated hole 77 formed in the cantilever link 76b also moves upward. Furthermore, as the pin 78c moves upward, the cantilever link 76b rotates clockwise around the shaft portion 92, and one end of the cantilever link 76b moves upward.

[0090] When one end of the cantilever link 76b moves upward, the other end of the second link 72b moves upward, and when the other end of the second link 72b moves upward, one end of the second link 72b also moves upward.

[0091] As one end of the second link 72b moves upward, the other end of the first link 72a moves upward, and the first link 72a rotates clockwise around the shaft 66a, causing the shaft 66a to rotate clockwise when viewed in the width direction.

[0092] The clockwise rotation of the shaft 66a rotates the gripping member 62. Specifically, the arcuate surface 62a of the gripping member 62 passes through the portion where the fixed molds 10b, 110b of the molds 10, 110 and the gripping member 62 are closest in the depth direction when viewed from the width direction, and the gripping member 62 rotates clockwise.

[0093] By rotating the gripping member 62, the workpiece 220 rotates so that the flat surface portion 220c of the workpiece 220 faces the depth direction.

[0094] In this state, the workpiece 220 held by the holding members 62 is placed on the front side in the depth direction of the fixed mold 110b of the mold 110, as shown in FIG.

[0095] (Configuration and Function of Mold 110) The mold 110 is aligned with the mold 10 in the width direction. In other words, the alignment direction of the mold 10 and the mold 110 is the width direction. Furthermore, as shown in FIG. 16, the movable mold 110a of the mold 110 is provided with a cylindrical pressing pin 120 extending toward the back in the depth direction. Specifically, the pressing pin 120 extends on a center line CL11 extending in the depth direction of the mold 110. The width direction is an example of the alignment direction of the molds 10 and 110.

[0096] Furthermore, the fixed mold 110b of the mold 110 is provided with a cylindrical pressing pin 130 that extends toward the front in the depth direction. Specifically, the pressing pin 130 extends on a center line CL11 that extends in the depth direction of the mold 110. Furthermore, the outer diameter of the pressing pin 130 is the same as the outer diameter of the pressing pin 120, and is smaller than the outer diameter of the circular flat portion 220c of the workpiece 220.

[0097] Then, by moving the movable mold 110a toward the rear in the depth direction, the pressing pin 120 and the pressing pin 130 clamp the oblate spherical portion 220a of the workpiece 220, thereby machining the workpiece 230 (see Figure 1 (D)) having a recess 230c.

[0098] (summary) As described above, in the mold 10, when the movable die 10a moves toward the rear in the depth direction, the inclined surface 18c of the extension member 18 presses the inclined surface 36d of the pressing member 36. This causes the pair of pressing members 36 to move in the vertical direction, and the pair of pressing members 36 press the spherical portion 210a of the workpiece 210 from both the top and bottom directions with their pressing surfaces 36b. In this way, when a product is machined using a part former, a pressing force can be applied to the workpiece 210 from the top and bottom directions that intersect with the depth direction, which is the direction of movement of the movable die 10a.

[0099] Furthermore, in the die 10, a pair of pressing members 36 are provided with a center line CL01 therebetween when viewed from the depth direction. This allows the die 10 to process (press) the workpiece 210 from both sides when viewed from the depth direction.

[0100] Furthermore, in the mold 10, with the pressing pin 14 restricting the movement of the workpiece 210 in the depth direction, the inclined surface 18c of the extension member 18 presses the inclined surface 36d of the pressing member 36 in the depth direction, causing the pressing member 36 to move up and down. This makes it possible to prevent the workpiece 210 pressed by the pressing member 36 from moving in the depth direction.

[0101] Furthermore, in the mold 10, the biasing member 16 elastically deforms to bias the pressing pin 14 against the workpiece 210. This makes it possible to effectively restrict the movement of the workpiece 210 even if the shape of the workpiece 210 varies in the depth direction.

[0102] Furthermore, in the mold 10, the biasing member 38 biases the pressing member 36 so that the base end of the pressing member 36 comes into contact with the opposing surface 32c of the main body 32. As a result, the pressing member 36 is disposed at an allowable position that allows the workpiece 210 moving in the depth direction to face the pressing member 36 in the up-down direction. In this way, the pressing member 36 can be moved to the allowable position by the biasing force of the biasing member 38 with a simple configuration, without using a link or the like to move the pressing member to the allowable position.

[0103] The mold 10 also includes a pair of holding members 40 that sandwich the workpiece 220 pushed out by the ejector pins 34 in the width direction to maintain the posture of the workpiece 220, and a biasing member 42 that biases the holding members 40 toward the workpiece 220. As a result, even if the shape of the workpiece 220 varies in the width direction, the posture of the workpiece 220 can be maintained by suppressing tilting of the workpiece 220 pushed out by the ejector pins 34.

[0104] Although the present disclosure has been described in detail with respect to a specific embodiment, it will be apparent to those skilled in the art that the present disclosure is not limited to such an embodiment and that various other embodiments are possible within the scope of the present disclosure. For example, in the above embodiment, a pair of pressing members 36 are provided with the workpiece 210 pressed against the fixed mold 10b between them when viewed from the depth direction, but a single pressing member may also be used. In this case, the effect achieved by providing a pair of pressing members will not be achieved.

[0105] In addition, in the above embodiment, the pressing member 36 pressed the workpiece 210 in a state in which the pressing pin 14 restricted the movement of the workpiece 210, but the pressing member may press a workpiece whose movement is not restricted. However, in this case, the effect of restricting the movement of the workpiece 210 is not achieved.

[0106] In the above embodiment, the movable mold 10a is provided with the biasing member 16 that elastically deforms to bias the pressing pin 14 against the workpiece 210, but the workpiece may be biased by magnetic force or the like. [Explanation of symbols]

[0107] 10. Molds (molds for parts formers) 10a Mobile 10b fixed type 14 Pressing pin (an example of a pressing member) 16. Pressurizing member 18 Extension member 18c Inclined surface (an example of another inclined surface) 34 Extrusion pin (an example of an extrusion member) 36 Pressing member 36b Pressing surface 36d slope 38 biasing member 40 Retaining member 42 biasing member 210 Work 220 Work

Claims

1. a fixed mold having a pressing member to which a workpiece is pressed from one side in one direction and which can move in an intersecting direction intersecting the one direction to press the pressed workpiece; a movable die that moves in the one direction to press the workpiece against the fixed die and also acts on the pressing member to move the pressing member in the intersecting direction, causing the pressing member to press the workpiece in the intersecting direction; A mold for a parts former comprising:

2. When viewed from the one direction, the pressing members are provided in pairs with the work pressed against the fixed die therebetween. A mold for the parts former according to claim 1.

3. the pressing member has a pressing surface that presses the workpiece and an inclined surface that is inclined with respect to the one direction, the movable die includes an extension member having another inclined surface that is inclined with respect to the one direction and presses the inclined surface in the one direction to move the pressing member in the intersecting direction, and a pressing member that contacts the workpiece in the one direction to press the workpiece against the fixed die, In a state in which the pressing member restricts the movement of the workpiece, the other inclined surface of the extension member presses the inclined surface of the pressing member. A mold for the parts former according to claim 1.

4. The movable mold includes a biasing member that is elastically deformed to bias the pressing member against the workpiece. A mold for the parts former according to claim 3.

5. the pressing member is movable between an allowable position that allows the workpiece moving in the one direction to face the pressing member in the intersecting direction, and a pressing position that presses the workpiece, the fixed die includes a biasing member that biases the pressing member to the allowed position, When the pressing member is biased to the allowable position by the biasing member, the other inclined surface of the extension member presses the inclined surface of the pressing member. A mold for the parts former according to claim 3.

6. The fixed die includes a push-out member that pushes out the workpiece pressed against the fixed die toward the other side of the one direction, a pair of holding members that sandwich the workpiece pushed out by the push-out member from another intersecting direction that intersects the one direction and the intersecting direction and maintains the attitude of the workpiece, and a biasing member that biases the holding members toward the workpiece. A mold for the parts former according to claim 1.

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