JP2006095536A - Pressing roller device for spinning processing - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressing roller for spinning with internal cooling device, wherein the cooling of the pressing roller and the lubrication of a rotary part are performed at the same time. <P>SOLUTION: This pressing roller device for spinning processing is provided with a rotary shaft part 30, a pressing roller part 40 which is provided on the top of the rotary shaft part and a supporting part 50 for rotatably supporting the rotary shaft part housed therein. A cooling passage 45 through which a liquid coolant flows is formed in the pressing roller part. The inlet side of the cooling passage is communicated with the inflow port 51 of a supporting member through the first connecting passage 31 of a rotary member and the lubricating passage 75 for a bearing 70. The outlet side of the cooling passage is communicated with the outflow port 52 of the supporting member through the second connecting path 32 of the rotary shaft part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a pressure roller device used when spinning a workpiece such as a vehicle wheel, and more particularly to a cooling structure thereof.

  In general, in the spinning process, a work is placed on the outer periphery of the mandrel, the pressure roller is pressed from the outer periphery of the work while the mandrel is rotated, and the pressure roller is moved relative to the mandrel in the axial direction. Move in the radial direction of the mandrel along the outer profile. As a result, the workpiece is formed into the outer peripheral shape of the mandrel. As an example, Patent Document 1 that discloses spinning of a vehicle wheel is cited.

By the way, in the spinning process, the pressing roller squeezes while pressing the workpiece, so that the workpiece material adheres to the pressing roller and a processing flaw may remain on the processed workpiece surface. In order to prevent adhesion of the material to the pressing roller portion, although not disclosed in Patent Document 1, generally, a cooling liquid (water containing a special water-soluble lubricant) that also serves as lubrication is applied to the pressing roller. The pressure roller is sprayed to cool the pressing roller.
Japanese Examined Patent Publication No. 47-15209

  However, in the method of cooling the pressure roller by spraying the cooling liquid, a large amount of cooling liquid is required to perform sufficient cooling, and management such as recovery of the cooling liquid is complicated. In particular, in the hot spinning process, when a large amount of cooling liquid is sprayed onto the pressing roller, the cooling liquid scatters on the work and cools the work, resulting in inconvenience that moldability is deteriorated.

The present invention has been made to solve the above-described problems, and includes (a) a rotation shaft portion, (b) a pressing roller portion provided at a tip of the rotation shaft portion, and (c) housing the rotation shaft portion. And a supporting part that is rotatably supported, and a pressing roller device for spinning processing,
The pressure roller portion is formed with a cooling passage through which the cooling liquid passes, the support portion is formed with an inlet port for the cooling liquid and an outlet port for the cooling liquid to be formed. A first communication passage connecting the inlet side of the cooling passage and the inlet is formed, and a second communication passage connecting the outlet side of the cooling passage and the outlet is formed.

  According to the above configuration, since the pressure roller portion is cooled by the coolant flowing inside the pressure roller portion, it is easier to manage the coolant than in the case where a large amount of coolant is ejected from the outside of the pressure roller portion. In particular, in the hot spinning process, the work is not cooled by the coolant, and good moldability can be secured.

  Preferably, the cooling passage includes an annular passage portion concentric with the outer periphery of the pressing roller portion. According to this, the outer periphery of the pressing roller portion can be uniformly and efficiently cooled by passing the coolant through the annular passage portion.

  Preferably, the cooling passage further includes a first auxiliary passage portion and a second auxiliary passage portion, and one end of each of the first and second auxiliary passage portions is provided at two locations facing the annular passage portion at approximately 180 °. The other ends of the first and second auxiliary passage portions are connected to the first and second communication passages, respectively. According to this, the coolant is divided into two hands in the annular passage portion and flows over a half circumference, so that cooling can be performed more uniformly and efficiently.

  Preferably, the pressing roller portion includes an annular outer member and an inner member fitted on the radially inner side of the outer member, and the gap between the inner peripheral surface of the outer member and the outer peripheral surface of the inner member. An annular passage portion is formed, and the first and second auxiliary passage portions are formed in a straight line on the inner member. According to this, the cooling passage having the annular passage portion can be easily formed.

  Preferably, a cylindrical gap between the rotation shaft portion and the support portion accommodates the bearing and is provided as a lubrication passage, and the lubrication passage is provided between the first communication passage of the rotation shaft portion and the support portion. The cooling liquid is interposed between the inlet and the inlet and serves as a lubricating oil for the bearing. According to this, since the coolant also serves as the lubricating oil and cools the pressure roller portion and the bearing, the passage structure for cooling and lubrication of the pressure roller device can be simplified. The circulation path structure in can also be simplified.

  According to the apparatus of the present invention, since the pressure roller portion is cooled by the cooling liquid flowing inside the pressure roller portion, it is easier to manage the cooling liquid as compared with the case where a large amount of the cooling liquid is ejected from the outside of the pressure roller portion.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an apparatus for spinning a vehicle wheel made of aluminum alloy (made of light alloy).
Describing schematically, this spinning processing apparatus includes a mandrel 10, a counter plate 20 (clamp member), a pressing roller device A, and a pressing mechanism (not shown) for moving the counter plate 20 up and down relative to the mandrel 10. A rotation drive mechanism (not shown) for rotating the mandrel 10 and the counter plate 20 together, an axial movement mechanism (not shown) for moving the pressing roller device A in the axial direction of the mandrel 10, and the pressing roller device A for the mandrel 10 And a radial movement mechanism (not shown) for moving in the radial direction.

  The mandrel 10 has a central axis (rotary axis) extending vertically, a molding cylinder 11, an end plate 12 fixed to the upper end of the molding cylinder 11, and an end of the mandrel 10 that is inserted and fixed in the center of the end board 12. A receiving cylinder 13 which is a part of the board 12 and a centering pin 14 inserted and fixed to the receiving cylinder 13 are provided. The head portion 14 a of the centering pin 14 protrudes upward from the upper surface of the flange 13 a of the receiving tube 13 (the end surface of the mandrel 10).

  The counter plate 20 includes a disk-shaped main body 21, a small-diameter disk-shaped support member 22, and a ring-shaped contact member 23. A hole 21a is formed at the center of the main body 21, and the support member 22 is fitted into the upper diameter enlarged portion of the central hole 21a, and the contact member 23 is fitted into the lower diameter enlarged portion. The support member 22 and the contact member 23 are fixed to the main body 21 by screwing bolts 24 penetrating the contact member 23 and the main body 21 into the support member 22.

  A detachment mechanism 25 is provided at the center of the counter plate 20. The detachment mechanism 25 includes a small-diameter disk-shaped pressing member 26 accommodated in the central hole 21 a of the main body 21 so as to be vertically slidable, and a compression coil spring 27 provided between the pressing member 26 and the support member 22. is doing. By this compression coil spring 27, the pressing member 26 is urged downward, that is, in a direction away from the support member 22.

  Next, the pressing roller device A, which is a feature of the present invention, will be described in detail with reference to FIG. The pressure roller device A includes a rotating shaft portion 30 having a central axis parallel to the central axis of the mandrel 10, a pressing roller portion 40 provided at the lower end (tip) of the rotating shaft portion 30, and the rotating shaft portion 30. A cylindrical support portion 50 that is housed and rotatably supported, and a pre-rotation shaft 60 inserted into the rotary shaft portion 30 are provided.

  The rotating shaft portion 30 is configured by a single shaft member whose diameter changes along the axial direction. The pressing roller portion 40 includes an annular outer member 40a and an annular inner member 40b that is fitted and fixed to the inner periphery of the outer member 40a. The inner member 40b is fitted and fixed to the lower end small diameter portion of the rotating shaft portion 30. The support part 50 has four annular or cylindrical members 50a to 50d fixed so as to be stacked in order from the top along the axial direction.

  The rotating shaft portion 30 is rotatably supported by the support portion 50 by a plurality of bearings 70 that are spaced apart from each other between the outer periphery and the inner periphery of the support portion 50.

  A housing hole 35 is formed in the rotating shaft portion 30 over a predetermined length from the upper end surface along the central axis, and the pre-rotating shaft 60 is housed in the housing hole 35 with a gap. The pre-rotation shaft 60 has an upper end portion rotatably supported by the support portion 50 by a bearing 80 and an intermediate portion rotatably supported by the rotary shaft portion 30 by a pair of upper and lower bearings 81. Further, a one-way clutch 82 is provided between the pair of bearings 81, and pre-rotation is transmitted from the pre-rotation shaft 60 to the rotary shaft portion 30 via the one-way clutch 82.

  The pressing roller device A is slidably supported on a movable table (not shown) in the horizontal direction, that is, in the radial direction of the mandrel 10, and can be moved in the same direction by the radial movement mechanism described above. The moving table is also moved by the above-described axial movement mechanism.

  The pressure roller device A has a passage structure that circulates lubricating and cooling oil (cooling fluid that also functions as lubricating oil) in order to lubricate the bearings 70, 80, and 81 and to cool the pressing roller portion 40. ing. Details will be described below.

  An inflow port 51 penetrating in the radial direction is formed in the uppermost member 50 a of the support portion 50, and an outflow port 52 is formed in the lowermost member 50 d of the support portion 50.

  An annular groove 43 (annular passage portion) is formed on the outer peripheral surface of the inner member 40b of the pressing roller portion 40. The inner and outer members 42 extend in the radial direction and are arranged in a straight line. Two auxiliary passage portions 41 and 42 are formed. The outer ends of these auxiliary passage portions 41, 42 are opposed to each other at an angle of 180 ° and are continuous with the annular groove 43, and the inner ends thereof open to the inner periphery of the inner member 42. The annular groove 43 and the auxiliary passage portions 41 and 42 constitute a cooling passage 45 for cooling the pressing roller portion 40.

  A cylindrical gap formed between the outer periphery of the rotary shaft portion 30 and the inner periphery of the support portion 50 is provided as a lubrication passage 75 for housing the bearing 70 and lubricating the bearing 70.

  The upper end of the lubrication passage 75 and the inlet 51 are an annular space 90 formed between the upper end portion of the pre-rotation shaft 60 and the member 51a of the support portion 50, and a T-shaped passage formed in the pre-rotation shaft 60. 61, a passage 65 formed between the outer periphery of the lower part of the pre-rotation shaft 60 and the inner periphery of the receiving hole 35 of the rotary shaft part 30, and the outer periphery of the intermediate part of the pre-rotating shaft 60 and the upper inner periphery of the receiving hole 35. They are connected to each other via a lubrication passage 85 formed between them for the bearing 81.

  Seal members 91 and 92 are arranged between the upper end portion of the pre-rotation shaft 60 and the support portion 50 on both sides (up and down) of the annular passage 90. The seal member 91 blocks the annular passage 90 from the outside, and the seal member 92 partitions the annular passage 90 from the lubrication passages 75 and 85.

  A first communication path 31 and a second communication path 32 are formed in the lower part of the rotating shaft part 30 (in the vicinity of the pressing roller part 40). The inlet side of the cooling passage 45 is connected to the inlet 51 via the first communication passage 31 and the above-described lubricating circuits 75 and 85, and the outlet side of the cooling passage 45 is the second communication passage. 32 is connected to the outlet 52 through 32.

  This will be described in more detail. The first communication passage 31 includes an upper horizontal passage portion that passes through the rotary shaft portion 30 in the radial direction, a vertical passage portion that extends downward in the axial direction from an intermediate portion of the horizontal passage portion, and a diameter from the vertical passage portion. A lower horizontal passage portion that extends in the direction and opens on the outer peripheral surface of the small-diameter portion of the lower end of the rotary shaft portion 30. Two open ends of the upper horizontal passage portion (inlet end of the first communication passage 31) are connected to a lower end (one end) of the lubrication passage 75. The open end of the lower horizontal passage portion is connected to the inner end of the first auxiliary passage portion 41 of the pressing roller portion 40.

  The second communication passage 32 includes an upper horizontal passage portion extending in the radial direction, a vertical passage portion extending downward from the inner end of the upper horizontal passage portion, and a lower horizontal passage extending radially from the vertical passage portion. And have a part. The opening end of the lower horizontal passage portion is continuous with the inner end of the second auxiliary passage portion 42 of the pressing roller portion 40. The open end of the upper horizontal passage portion (the exit end of the second communication passage 32) is connected to an annular passage 93 formed between the rotary shaft portion 30 and the support portion 50.

  The annular passage 93 is adjacent to the lubrication passage 75 and coincides with the outlet 52 in the axial direction. Seal members 94 and 95 are disposed between the rotary shaft portion 30 and the support portion 50 on both sides (up and down) of the annular passage 93. The seal member 94 is for blocking the annular passage 93 and the lubrication passage 75 disposed above the annular passage 93, and the seal member 95 is for blocking the annular passage 93 and the outside.

  The operation of the spinning device having the above configuration will be schematically described with reference to FIG. First, the preform 100 (work) to be processed will be described. This preform 100 has a disk portion 101 and a rim original shape portion 102 integrally. The rim original shape portion 102 has a first portion 102a and a second portion 102b. Further, the preform 100 has a runner forming portion 103 formed corresponding to the mold runner and a concave portion 104 formed corresponding to the molten metal guide portion. The runner forming part 103 protrudes on the opposite side of the second part 102 b of the rim original part 102 in the center of the disk part 101. The concave portion 104 is located on the back side of the runner forming portion 103.

  In the spinning process, the preheated preform 100 is set on the mandrel 10 by the transfer robot. That is, the rim original shape portion 102 fits on the outer peripheral surface of the molding cylinder 11 of the mandrel 10, and the central portion of the disk portion 101 is placed on the flange 13 a of the receiving cylinder 13 of the mandrel 10. In the set state of the preform 100, the preform 100 is centered by fitting the head portion 14 a of the centering pin 14 into the concave portion 104 of the preform 100.

  After the preform 100 is set on the mandrel 10, the pressing mechanism is operated to lower the counter plate 20, and the preform 100 is sandwiched between the counter plate 20 and the mandrel 10. At this time, the abutting member 23 of the counter plate 20 pushes the central portion of the disk portion 101 of the preform 100. The pressing load received by the preform 100 is received by the flange 13 a of the receiving tube 13 of the mandrel 10.

  In the sandwiched state, the runner forming portion 103 enters the central hole 21 a of the counter plate 20. The pressing member 26 hits the runner forming portion 103, and the pressing member 26 rises relative to the main body 21 and approaches or hits the support member 22. The pressing member 26 presses the runner forming portion 103 with the force of the compression coil spring 27.

  In a state where the preform 100 is sandwiched, the mandrel 10 is rotated by the rotation driving mechanism, thereby rotating the mandrel 10 and the counter plate 20 together. At the same time, the pressure roller device A is moved downward by the axial movement mechanism, and the pressure roller device A is moved by the radial movement mechanism in the radial direction of the mandrel 10 corresponding to the profile of the outer periphery of the mandrel 10.

  Due to the above action, the pressing roller 40 is pressed against the second portion 102b of the rim original shape portion 102 of the preform 100 while being reduced in thickness. Thereby, as shown by the imaginary line of FIG. 2, the rim | limb part 109 of the shape close | similar to the final shape of a vehicle wheel is obtained.

  The spinning process involves a large flow of the material of the rim original shape part 102 (plastic deformation of the material in a broad sense), and compression of the nest, refinement of the structure (dynamic recrystallization), anisotropy of the structure (rolling structure) , Work hardening can be realized.

  When the spinning process is finished, the pressing mechanism is operated to move the counter plate 20 upward and away from the mandrel 10. At this time, the pressing member 26 presses the runner forming portion 103 by the force of the compression coil spring 27 of the detaching mechanism 25, so that the vehicle wheel is detached from the counter plate 20 and left on the mandrel 10. Then, the vehicle wheel left on the mandrel 10 is unloaded by the transfer robot.

  After the spinning process, heat treatment is performed, and a hub hole is formed in the center of the disk part 101, a bolt hole is formed around the hub part, a cutting process is performed on the rim part 109, and coating is performed. Is completed. When forming the hub hole, the runner forming portion 103 is removed.

  Next, the action at the time of spinning of the pressing roller device A which is a characteristic part of the present invention will be described in detail. The pre-rotation shaft 60 is rotated by a pre-rotation motor (not shown). The rotation of the pre-rotation shaft 60 rotates the rotary shaft portion 30 and the pressing roller portion 40 via the one-way clutch 82. The pressing roller unit 40 presses the rotating preform 100 while pre-rotating. After contacting the preform 100, the pressing roller unit 40 rotates at a higher speed than the pre-rotation with the rotation of the preform 100.

  Lubricating and cooling oil flows from the inlet 51 of the pressure roller device A, passes through the lubricating passages 90 and 61 and 65, passes through the lubricating passages 85 and 75, and the bearing 80 disposed in the lubricating passages 85 and 75. , 81, 70 are lubricated.

  Thereafter, the lubricating / cooling oil passes from the lower end of the lubrication passage 75 through the first communication passage 31 of the rotating shaft portion 30, through the cooling passage 45 of the pressing roller portion 40, and further through the second communication passage 32 and the annular passage 93. Then, it flows out from the outlet 52. Lubricating and cooling oil that has exited from the outlet 52 is radiated in the process of returning to the outlet 51 by a pump (not shown) through a circulation path.

  The flow of the lubricating / cooling oil in the cooling passage 45 will be described in detail with reference to FIG. The lubricating and cooling oil that has flowed into the inner end of the first auxiliary passage 41 from the first communication passage 31 reaches the annular groove 43 along the first auxiliary passage 41 in the radially outward direction, and is divided into two hands here. Each of the annular grooves 43 flows over a half circumference, reaches the outer end of the second auxiliary passage 42, flows radially inward along the second auxiliary passage 42, and travels toward the second communication passage 32.

  The lubricating and cooling oil cools the pressing roller portion 40, particularly the outer member 40a, particularly in the course of flowing through the annular groove 43 of the cooling passage 45. As a result, it is possible to prevent the material of the preform 100 from adhering to the pressure roller 40 and to prevent the processing flaw from occurring.

  The lubricating and cooling oil flows concentrically with the outer periphery of the pressing roller portion 40 and flows through the annular groove 43 formed close to the outer periphery, and further, divided into two hands and flows half a cycle, so that the pressing roller portion 40, particularly the outer member 40a can be cooled evenly and efficiently.

  During the spinning process, a lubricating processing liquid composed of water containing a water-soluble lubricant is sprayed from the nozzle (indicated by reference numeral 200 in FIG. 2) toward the pressing roller unit 40 together with the compressed air. , And the preform 100 is not cooled, and good moldability can be secured.

The present invention can adopt other forms. For example, the center axis (rotary axis) of the mandrel may be horizontal during spinning.
The present invention can also be applied to cold spinning.

It is a longitudinal cross-sectional view which shows the apparatus which spins a preform. It is an expansion longitudinal cross-sectional view of the press roller apparatus used for the apparatus. It is sectional drawing which follows the BB line in FIG.

Explanation of symbols

A Pressure roller device 10 Mandrel 20 Counter plate (clamp member)
30 Rotating shaft portion 31 First communication passage 32 Second communication passage 40 Press roller portion 40a Outer member 40b Inner member 41 First auxiliary passage portion 42 Second auxiliary passage portion 43 Annular groove (annular passage portion)
45 Cooling passage 50 Support portion 51 Inlet 52 Outlet 70 Bearing 75 Lubrication passage 100 Preform (work)

Claims (5)

(A) a rotating shaft part;
(A) a pressing roller portion provided at the tip of the rotating shaft portion;
(C) a support portion that accommodates the rotation shaft portion and supports it rotatably;
In the pressing roller device for spinning processing provided with
The pressure roller portion is formed with a cooling passage through which the cooling liquid passes, the support portion is formed with an inlet port for the cooling liquid and an outlet port for the cooling liquid to be formed. A spinning process characterized in that a first communication passage that connects the inlet side of the cooling passage and the inlet is formed, and a second communication passage that connects the outlet side of the cooling passage and the outlet is formed. Press roller device.   2. The spinning roller assembly according to claim 1, wherein the cooling passage includes an annular passage portion concentric with the outer periphery of the pressing roller portion.   The cooling passage further includes a first auxiliary passage portion and a second auxiliary passage portion, and one ends of the first and second auxiliary passage portions are respectively connected at two positions facing the annular passage portion at approximately 180 °, 3. The spinning roller for pressing according to claim 2, wherein the other ends of the first and second auxiliary passage portions are connected to the first and second communication passages, respectively.   The pressing roller portion has an annular outer member and an inner member fitted on the radially inner side of the outer member, and the annular passage portion is provided between the inner peripheral surface of the outer member and the outer peripheral surface of the inner member. 4. The spinning roller assembly according to claim 3, wherein the inner member is formed with the first and second auxiliary passage portions in a straight line.   A cylindrical gap between the rotary shaft portion and the support portion accommodates the bearing and is provided as a lubrication passage. The lubrication passage includes a first communication passage of the rotation shaft portion and an inlet of the support portion. 5. The spinning roller for pressing according to claim 1, wherein the cooling liquid also serves as a lubricating oil for the bearing.

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