JP5467023B2 - Machine tool cover device - Google Patents

Description

  The present invention relates to a cover device for preventing cutting water and other mixed cutting water from entering a machine tool, in particular, a drive mechanism for moving a spindle base, tool post, etc. of a turret lathe.

  As this type of cover device, a headstock and a tool post are respectively provided at the required positions on the top surface of the bed, and either the headstock or the tool post is a movable base that is movable in the left-right direction. In addition, a drive mechanism for moving the movable base is provided at the lower level of the movable path of the movable base, and a movable cover that moves together with the movable base and covers the drive mechanism is fixed to the movable base. The fixed cover is fixed to the bed along the rear edge of the moving path of the base, and the upper surface of the rear edge of the movable cover and the lower surface of the front edge of the fixed cover are opposed to each other with a predetermined gap in the vertical direction. The movable seal member is attached along the upper surface of the rear edge of the movable cover, and the fixed seal member is attached along the lower surface of the front edge of the fixed cover. In by sliding through the gap, the drive mechanism, which chips such as contaminated cutting water is to prevent the intrusion are known (e.g., see Patent Document 1.).

  In the above cover device, it is a necessary condition that the movable seal member and the fixed seal member are always in sliding contact, and in order to achieve this, the rear edge of the movable cover and the lower surface of the front edge of the fixed cover are necessary. It is necessary to keep the gap between them constant, and management of the gap is not easy. Furthermore, if fine chips or the like are bitten between the movable seal member and the fixed seal member, there is a possibility that both the seal members are damaged or both the covers are deformed.

  Moreover, it is a structure in which the invading chips are hard to come off, and there is a risk that it will eventually enter the drive mechanism.

JP 2008-264925 A

  An object of the present invention is to prevent cutting water and other mixed cutting water from entering a driving mechanism without strict management of a gap between a movable cover and a fixed cover, and maintenance of a seal member or the like is also unnecessary. It is an object of the present invention to provide a machine tool cover device capable of ensuring stable quality.

  In the machine tool cover device according to the present invention, the movable base, the first cover, and the second cover are respectively disposed at required positions on the top surface of the bed, and the movable base is movable in the left-right direction. A drive mechanism for moving the movable base is provided at a lower level of the movable path of the movable base, and the front edge of the second cover is positioned above the rear edge of the first cover with a vertical seal gap therebetween. In the seal gap, a strip-like seal wall extending in the left-right direction is raised from the upper surface of the rear edge of the first cover toward the lower surface of the front edge of the second cover. A folding wall is projected forward from the upper end along the lower surface of the front edge of the second cover, a play gap is formed between the lower surface of the front edge of the second cover and the upper surface of the folding wall, From the front edge of the cover to the play gap from the front The covered downward bent wall is suspended, and one of the first cover and the second cover is fixed to the movable base so as to be covered with the drive mechanism and move in the left-right direction together with the movable base. The other side is fixed to the bed along the moving path of the movable table.

  In the cover device for a machine tool according to the present invention, the sealing wall prevents the cutting water that has entered the seal gap from passing through the seal gap. Therefore, it is possible to prevent the cutting water from entering the drive mechanism. In addition, due to the presence of the play gap, variations in the seal gap can be absorbed by that amount, and it is not necessary to strictly manage the seal gap, and maintenance of device components such as the seal wall is unnecessary and stable. Quality can be ensured.

  Furthermore, even if the cutting water enters the seal gap vigorously, the cutting water is rebounded by the folding wall, so that it becomes difficult for the cutting water to pass through the play gap. Further, the downward bent wall prevents the cutting water from directly hitting the play gap.

  According to the present invention, it is possible to prevent the cutting water mixed with chips and the like from entering the drive mechanism without strict management of the gap between the movable cover and the fixed cover. There is no need for maintenance, and a machine tool cover device capable of ensuring stable quality is provided.

It is a perspective view of the machine tool provided with the cover apparatus by this invention. It is a vertical cross-sectional view of the machine tool. It is a principal part expanded sectional view of the cover apparatus.

  In the following description, front and rear refer to the front side of the turret lathe (right front side of FIG. 1, right side of FIG. 2) as the front, and the opposite side as the rear. The left and right sides are called left and right.

  Referring to FIG. 1, the bed 11 of the turret lathe has a front and lower inclined top surface 12.

  In the middle of the height of the bed top surface 12, a first headstock 21 and a second headstock 22 are provided so as to be opposed to each other on the left and right. The second head stock 22 is movable in the left-right direction. A first tool post 23 is provided on the bed top surface 12 behind the first headstock 21. A second tool post 24 is provided on the bed top surface 12 behind the second headstock 22. The first tool post 23 and the second tool post 24 are movable in the left-right direction. A third tool post 25 is provided in front of the second headstock 22 on the bed top surface 12. The third tool post 25 is movable in the left-right direction.

  A first movable cover 31 is fixed to the second spindle stock 22 in a cantilever shape protruding leftward. A first saddle (not shown) of the first tool rest 23, more specifically, a first tool rest 23 that is movably supported in the tilt direction of the bed top surface 12 and is moved in the left-right direction together with the first tool rest 23. A second movable cover 32 is fixed to one saddle so as to protrude rightward. A second saddle (not shown) of the third tool post 25, more specifically, a third movable cover 33 is cantilevered in a leftward projecting manner on the second saddle corresponding to the third tool post 25 instead of the first saddle. It is fixed.

  A gap is formed between the first movable cover 31 and the second movable cover 32, and the first fixed cover 34 is covered therewith. A gap is formed between the first movable cover 31 and the third movable cover 33, and the second fixed cover 35 is covered with the gap.

  When the second head stock 22 moves left from the state shown in FIG. 1, the first movable cover 31 is drawn into the first head stock 21. When the first tool post 23 moves to the right or when the first tool post 23 and the second tool post 24 are brought close to each other, the second movable cover 32 is drawn into the second tool post 24. When the third tool post 25 moves to the left, the third movable cover 33 is advanced in front of the first headstock 21.

  A first screw rod 41 screwed to the second headstock 22 below the movement path of the first movable cover 31 is a first screw rod screwed to the first tool rest 23 below the movement path of the second movable cover 32. The second screw rod 42 and the third screw rod 43 screwed to the second tool post 24 are below the movement path of the third movable cover 33, and the fourth screw rod 44 screwed to the third tool post 25 is left and right respectively. It extends in the direction.

  The output shaft of the first motor 51 is at the left end of the first screw rod 41, the output shaft of the second motor 52 is at the left end of the second screw rod 42, and the third is at the right end of the third screw rod 43. The output shaft of the motor 53 and the output shaft of the fourth motor 54 are connected to the left end of the fourth screw rod 44, respectively.

  Referring to FIG. 2, a pair of first guide rails 61 slidably fitted to the second headstock 22 on both front and rear sides of the first screw rod 41 are arranged on the front and rear sides of the second and third screw rods 42 and 43. A pair of second guide rails 62 slidably fitted on both sides to the first and second tool rests 24 are slidably fitted on the third tool rest 25 on both front and rear sides of the fourth screw rod 44. The paired third guide rails 63 extend in the left-right direction.

  In FIG. 2, the third movable cover 33, the second fixed cover 35, the first movable cover 31, the first fixed cover 34, and the second movable cover 32 are arranged in this order along the bed top surface 12 from the front to the rear. Are arranged in parallel. Further, in the adjacent ones of these covers 31 to 35, the front edges of the rear covers 31 to 35 are arranged higher than the rear edges of the front covers 31 to 35. Yes. In other words, all these covers 31 to 35 are arranged in a step-down manner.

  The first movable cover 31 is received by a first receiving member 71 fixed to the bed 11 via a first sliding member 72. The third movable cover 33 is received by a second receiving member 73 fixed to the bed 11 via a second sliding member 74. Although the receiving structure of the second movable cover 32 is omitted, it conforms to that of the first movable cover 31 and the third movable cover 33. The first fixed cover 34 is fixed to the bed 11 by the first support member 75 and the second fixed cover 35 is fixed to the bed 11 by the second support member 76, respectively.

  A first seal mechanism 81 is provided between the rear edge of the third movable cover 33 and the front edge of the second fixed cover 35, and the first seal mechanism 81 is provided between the rear edge of the second fixed cover 35 and the front edge of the first movable cover 31. A second seal mechanism 82 is provided between the rear edge of the first movable cover 31 and the front edge of the second fixed cover 35, and the third seal mechanism 83 is provided between the rear edge of the second fixed cover 35 and the second movable cover 32. A fourth seal mechanism 84 is provided between the front edges.

  FIG. 3 shows the first and second sealing mechanisms 81 and 82 in detail.

  First, the first seal mechanism 81 will be described. A seal gap 101 is formed between the rear edge portion of the third movable cover 33 and the front edge portion of the second fixed cover 35. A seal piece 102 is accommodated in the seal gap 101. The seal 102 piece is made of a long member having a substantially S-shaped cross section extending in the left-right direction, and includes a seal wall 111 orthogonal to the upper surface of the rear edge of the third movable cover 33, The base wall 112 protrudes rearward from the lower end and is fixed to the upper surface of the rear edge of the third movable cover 33, and the folded wall 113 protrudes forward from the upper end of the seal wall 111. A first play gap 114 is formed between the lower surface of the front edge of the second fixed cover 35 and the upper surface of the folding wall 113. An upward bent wall 115 rises from the rear edge of the third movable cover 33. A downward bent wall 116 is suspended from the front edge of the second fixed cover 35. The downward bent wall 116 is covered with the first play gap 114 from the front. A baffle piece 121 is accommodated between the seal wall 111 and the upward bent wall 115. The baffle piece 121 is made of a long member having a substantially inverted L-shaped cross section extending in the left-right direction. The top wall 132 protrudes rearward from the upper end of the second fixed cover 35 and is fixed to the lower surface of the rear edge of the second fixed cover 35. A second play gap 133 is formed between the upper surface of the rear edge of the third movable cover 33 and the lower end of the baffle wall 131.

  The space between the seal wall 111 and the upward bent wall 115 is partitioned by a baffle wall 131 into a front large space 141 and a rear small space 142.

  Next, the second seal mechanism 82 will be described. The second seal mechanism 82 performs the same sealing function as the first seal mechanism 81, and the rear edge portion of the third movable cover 33 of the first seal mechanism 81 is replaced with the rear edge portion of the second fixed cover 35. Further, the front edge portion of the second fixed cover 35 is replaced with the front edge portion of the first movable cover 31, respectively.

  Parts corresponding to the first seal mechanism 81 are denoted by the same reference numerals in the respective portions of the second seal mechanism 82, and detailed description thereof is omitted.

  For the third seal mechanism 83, the basic configuration of the first seal mechanism 81 is adopted, and for the fourth seal mechanism 84, the basic configuration of the second seal mechanism 82 is adopted, whereby the third and fourth seals are adopted. The mechanism 84 is configurable. Illustration and illustration of the detailed structure of the third and fourth seal mechanisms 84 are omitted.

  The first and second play gaps 114 and 133 are for absorbing the above-mentioned various cover in consideration of processing accuracy of the various covers and bending deformation during use. When the sizes of the play gaps 114 and 133 are shown as specific numerical values, for example, they are 0.5 to 3 mm.

  Next, the sealing function will be described with reference to the first sealing mechanism 81. The cutting fluid may flow into the first seal mechanism 81 from the upper side or bounce off the workpiece and flow from the lower side. In the latter case, the effect of the sealing mechanism performing the sealing function is significant.

  The cutting water that is about to flow into the seal gap 101 collides with the downward bent wall 116, thereby preventing the cutting water from hitting the first play gap 114 directly. When the cutting water flows under the downward bent wall 116 and flows into the seal gap 101, it collides with the seal wall 111. Even if the cutting water flowing upward along the seal wall 111 tries to get over the seal wall 111, the cutting water is rebounded by the folding wall 113.

  Further, by making the seal gap 101 large, the cutting water colliding with the seal wall 111 can be easily returned to the cutting space, and the possibility of the cutting water passing through the first play gap 114 is further reduced. Even if the cutting water passes through the first play gap 114, it is very small, and the small amount of cutting water is held in the bowl-shaped space formed by the seal wall 111 and the upward bent wall 115, It is recovered from the end in the direction orthogonal to the cutting water supply source. In addition, since the baffle wall 131 exists, as a result, there is no cutting water passing through the small space 142 and over the upward bent wall 115.

In the above, three movable covers and two fixed covers are shown. The number of covers is not limited to this, and it is obvious that the number of covers is set as needed depending on the function and form of the lathe.

  The cover device according to the present invention is suitable for achieving prevention of intrusion of cutting water or other mixed cutting water into a drive mechanism for moving a headstock, a tool post, etc. in a machine tool, particularly a turret lathe. ing.

21 and 22 headstock
23 ~ 25 Turret
31-33 Movable cover
34, 35 Fixed cover
41-44 Screw rod
101 Seal gap
111 Sealing wall

Claims (3)

  A movable base, a first cover, and a second cover are respectively disposed at required places on the top surface of the bed, and the movable base is movable in the left-right direction, and a drive mechanism for moving the movable base Is provided at the lower level of the moving path of the movable table, the front edge of the second cover is opposed to the upper edge of the rear edge of the first cover with a vertical seal gap, A strip-shaped seal wall extending in the left-right direction is raised from the upper surface of the rear edge of the first cover toward the lower surface of the front edge of the second cover, and from the upper end of the seal wall to the front edge of the second cover The folding wall is projected forward along the lower surface of the part, and a play gap is formed between the lower surface of the front edge of the second cover and the upper surface of the folded wall, and from the front edge of the second cover to the play gap. The downward bent wall covered from the front is suspended. One of the first cover and the second cover is covered with the drive mechanism and fixed to the movable base so that it can move in the left-right direction together with the movable base, and the other is the moving path of the movable base. A machine tool cover device that is fixed to the bed.   The cover device for a machine tool according to claim 1, wherein an upward bent wall is raised from a rear edge portion of the first cover.   The machine apparatus cover device according to claim 2, wherein a belt-like baffle wall extending in the left-right direction is suspended from the lower surface of the front edge of the second cover between the seal wall and the upward bent wall.

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