JP3144606U - Linear motion bearing and punching unit using the same - Google Patents

Abstract

Provided are a linear motion bearing and a punching unit that can easily ensure the straightness of each member such as a punch plate and a stripper plate that are stroked separately when punching a workpiece.
A linear motion bearing (2) is provided with two sleeves (22) and retainers (23) with respect to a guide post (21). In the punching unit 1, a stripper plate 13 for clamping the workpiece W is disposed between the punch plate 11 and the die plate 12. The lower end portion of the guide post 21 of the linear motion bearing 2 is fixed to the die plate 12, the punch plate 11 is fixed to the first sleeve 22A, and the stripper plate 13 is fixed to the second sleeve 22B. Yes. A spring 5 is attached between the punch plate 11 and the stripper plate 13.
[Selection] Figure 1

Description

  The present invention relates to a linear motion bearing applied to punching and the like, and a punching unit using the same.

Conventionally, a press device as a punching unit is known.
As shown in FIGS. 3 and 4, the press apparatus 100 is usually provided with a stripper plate 113 for clamping the workpiece W between the punch plate 111 and the die plate 112, and the punch plate 111 has a punching die. P is disposed, and the stripper plate 113 is provided with a through hole 116 through which the punching die P provided in the punch plate 111 passes. The punch plate 111 is attached so as to be linearly guided by linear motion bearings 102 fixed to the left and right of the die plate 112, respectively. The linear motion bearing 102 has a configuration in which a sleeve 122 is externally fitted to a guide post 121 via a retainer 123 holding a rolling element 103 such as a ball, and the lower end portion of the guide post 121 is fixed to the die plate 112. The punch plate 111 is fixed to the sleeve 122. Therefore, when the punch plate 111 is moved up and down by a drive system (not shown), the left and right linear bearings 102 guide the punch plate 111 linearly.

  In addition, guide rods 105 are attached to the punch plate 111 so as to be able to move forward and backward by externally fitting springs 104, respectively, and a stripper plate 113 is fixed to the lower ends of these guide rods 105. . Accordingly, the stripper plate 113 is linearly guided by the guide rod 105.

  When punching the workpiece W by the press device 100 having the above-described configuration, when the punch plate 111 is lowered, the stripper plate 113 is lowered and the workpiece W is clamped between the stripper plate 113 and the die plate 112. When the punch plate 111 is subsequently lowered, the punch plate 111 is lowered against the spring 104 fitted around the guide rod 105 and the workpiece W is punched from the punching die P.

In this way, the pressing device 100 strokes the stripper plate 113 and the punch plate 111 separately, presses the workpiece W by the stripper plate 113 in the first stage, and punches the workpiece W by the punch plate 111 in the second stage. Etc. Thereby, the smoothness and flatness of the processed surface of the workpiece | work W are ensured.
JP-A-8-164430

  However, in the press apparatus 100, the punch plate 111 is linearly guided by the linear motion bearing 102 so that the punch plate 111 and the stripper plate 113 are separately stroked, and the stripper plate 113 is provided on the punch plate 111. The guide rod 105 guides linearly. Therefore, the straightness of each of the punch plate 111 and the stripper plate 113 is ensured corresponding to the two stages of the first stage in which the workpiece W is pressed by the stripper plate 113 and the second stage in which the workpiece W is punched out by the punch plate 111. There was a need. As a result, the apparatus 100 becomes complicated and causes high costs.

  Further, a large force is applied to the stripper plate 113 or the like during pressing or the like, and the guide rod 105 may be damaged. If the guide rod 105 is damaged, it is necessary to stop the operation of the apparatus for repair, and as a result, productivity is lowered.

  The present invention has been made under the circumstances described above, and is a linear motion bearing that can easily ensure the straightness of each member such as a punch plate and a stripper plate that are stroked separately when punching a workpiece. It is another object of the present invention to provide a punching unit using the same.

(Linear bearing)
The linear motion bearing according to the present invention is
A cylindrical or columnar guide post;
A cylindrical sleeve that moves relatively in the axial direction around the guide post; and
A retainer for holding a plurality of rolling elements that roll in the axial direction between the outer peripheral surface of the guide post and the inner peripheral surface of the sleeve;
Two or more of the sleeves and the retainers are arranged for one guide post.

According to this configuration, two or more of the sleeves and the retainers are disposed for one guide post, so that each sleeve is independently guided by the same guide post and relatively moves in the axial direction. Can do. Thereby, for example, when each plate is moved by attaching the plate to each sleeve, each plate can be easily guided by the same guide post and separately stroked.
In addition, since each sleeve is guided by the same guide post, the same straightness is ensured for each sleeve. Thus, for example, by attaching a plate to each sleeve, it is possible to easily ensure straightness at each stage corresponding to each plate.

(Punching unit)
The punching unit according to the present invention is
A stripper plate for clamping a workpiece is disposed between the punch plate and the die plate, a punching die is disposed in the punch plate, and a punching die provided in the punch plate passes through the stripper plate. A punching unit provided with a through hole,
Including at least two or more of the linear motion bearings,
A guide post of the linear motion bearing is fixed to the die plate;
A first sleeve of the linear motion bearing is fixed to the punch plate;
The second sleeve of the linear bearing is fixed to the stripper plate.

According to this configuration, the first sleeve of the linear motion bearing is fixed to the punch plate, and the second sleeve of the linear motion bearing is fixed to the stripper plate, that is, the punch plate and the stripper plate are independent from each other. 1 and 2 fixed to sleep. Accordingly, when the punch plate and the stripper plate are moved, the punch plate and the stripper plate can be easily guided by the same guide post and separately stroked. In addition, since the punch plate and the stripper plate are guided by the same guide post, it is possible to easily ensure straightness at each stage corresponding to each of the punch plate and the stripper plate.
Therefore, the guide rod as in the conventional press apparatus is not necessary, and the apparatus is not complicated. Further, since the guide rod as in the conventional press device is not required, there is no problem that the device is stopped due to the breakage of the guide rod or the like.

The punching unit according to the present invention is
A stripper plate for clamping a workpiece is disposed between the punch plate and the die plate, a punching die is disposed in the punch plate, and a punching die provided in the punch plate passes through the stripper plate. A punching unit provided with a through hole,
Including at least two or more of the linear motion bearings,
A guide post of the linear motion bearing is fixed to the punch plate;
A first sleeve of the linear bearing is fixed to the die plate;
The second sleeve of the linear bearing is fixed to the stripper plate.

According to this configuration, the first sleeve of the linear motion bearing is fixed to the die plate, and the second sleeve of the linear motion bearing is fixed to the stripper plate, that is, the die plate and the stripper plate are independent from each other. 1 and 2 fixed to sleep. Therefore, when the die plate and the stripper plate are moved, the die plate and the stripper plate can be guided by the same guide post and stroked separately. Moreover, since the die plate and the stripper plate are guided by the same guide post, it is possible to easily ensure straightness at each stage corresponding to each of the die plate and the stripper plate.
Therefore, the guide rod as in the conventional press apparatus is not necessary, and the apparatus is not complicated. Further, since the guide rod as in the conventional press device is not required, there is no problem that the device is stopped due to the breakage of the guide rod or the like.

  Further, the punching unit is configured such that the punching die of the punch plate punches the workpiece after the stripper plate presses the workpiece with the die plate.

  Thereby, after the work is pressed onto the die plate by the stripper plate pressing the work on the die plate, the work can be punched out by the punch plate. Therefore, since the workpiece is punched in a state where it is fixed on the die plate by the stripper plate, the processed surface of the workpiece becomes smoother and flat.

As the punching unit,
A biasing member is attached between the punch plate and the stripper plate, or between the die plate and the stripper plate,
When the punch plate and the die plate are brought close to each other, the punching die of the punch plate is inserted from the through-hole of the stripper plate in a state where the stripper plate clamps a workpiece between the die plate and the punch plate. The elastic force may be set so as to protrude and punch the workpiece.

Accordingly, the first stage in which the stripper plate clamps the workpiece with the die plate, and the punching die of the punch plate is protruded from the through hole of the stripper plate in the workpiece clamping state to punch out the workpiece. The second stage can be easily moved. Therefore, it is possible to easily realize a punching process or the like that ensures the smoothness and flatness of the work surface of the workpiece with an apparatus having a simple configuration.
When the urging member is attached between the punch plate and the stripper plate, the punch plate is disposed on the upper side and the punch plate is moved up and down, or the punch plate is disposed on the lower side and the punch plate is disposed on the punch plate. Any method of raising and lowering the plate can be used. On the other hand, when the urging member is attached between the die plate and the stripper plate, the die plate can be disposed on the lower side and the die plate can be moved up and down.

  As described above, since the linear motion bearing according to the present invention includes two or more sleeves and retainers for one guide post, each plate is moved by attaching the plate to each sleeve. It is possible to easily stroke the plates separately, and it is also possible to easily ensure straightness at each stage corresponding to each plate. Therefore, it can be effectively used as a linear motion bearing of an apparatus for punching, for example, fine blanking.

  Further, the punching unit according to the present invention includes the linear motion bearing and guides the punch plate (or die plate) and the stripper plate with the same linear motion bearing. Therefore, in punching processing, for example, fine blanking processing, etc. It is also easy to ensure straightness at each stage corresponding to each of the punch plate (or die plate) and the stripper plate. In addition, since the guide rod as in the conventional press apparatus is not required, the apparatus is not complicated, and there is no problem that the apparatus is stopped due to breakage of the guide rod or the like.

The present invention will be described below with reference to the accompanying drawings.
As shown in FIG. 1, the punching unit 1 according to the embodiment has a stripper plate 13 disposed between a punch plate 11 and a die plate 12. The punch plate 11, die plate 12, and stripper plate 13 are supported by two linear motion bearings 2 arranged on the left and right.

  The linear motion bearing 2 includes a cylindrical or columnar guide post 21, a cylindrical sleeve 22 that relatively moves around the guide post 21 in the axial direction, an outer peripheral surface of the guide post 21, and the sleeve 22. And a retainer 23 for holding a plurality of needle-like rollers (rolling elements) 3 that roll in the axial direction between the inner peripheral surface. Two sleeves 22 and two retainers 23 are provided on one guide post 21. That is, the sleeve 22 includes a first sleeve 22A and a second sleeve 22B, and a first retainer 23A is disposed between the first sleeve 22A and the guide post 21 disposed on the upper side. A second retainer 23 </ b> B is disposed between the second sleeve 22 </ b> B and the guide post 21. The first sleeve 22A, the second sleeve 22B, the first retainer 23A, and the second retainer 23B have the same shape and structure except for the length.

  The guide post 21 has a polygonal shaft portion 21b above the collar portion 21a formed at the base end, and the polygonal shaft portion 21b has a hexagonal shape in which the top portion has an arc shape. It has become. The first and second sleeves 22A and 22B that are externally fitted to the guide post 21 have a circular outer peripheral cross section, and an inner peripheral cross section that is similar to the polygonal shaft portion 21b of the guide post 21, that is, a hexagonal shape. It has become. The first and second retainers 23A and 23B disposed in the gap between the guide post 21 and the first and second sleeves 22A and 22B are polygonal cylinders, that is, hexagonal cylinders. A plurality of rollers 3 are juxtaposed in parallel to each other and supported so as to roll in the axial direction of the guide post 21. Note that a plurality of rectangular openings (not shown) are provided in the flat portions of the first and second retainers 23A and 23B, and the rollers 3 are rotatably held in these openings. The roller diameter of each roller 3 is made larger in units of microns than the gap between the planar portions of the guide post 21 and the first and second sleeves 22A and 22B, thereby making the guide post 21 and the first and second sleeves 22A and 22B. And preload can be applied. Moreover, between the 1st retainer 23A and the 2nd retainer 23B, and between the 2nd retainer 23B and the collar part 21a, in order to prevent the position shift of 1st, 2nd retainer 23A, 23B, respectively. Coil springs B1 and B2 are arranged.

  In the punching unit 1 shown in FIG. 1, the guide post 21 of the linear motion bearing 2 is attached to the die plate 12 in an upright state using a washer 24 and a mounting bolt 25, and is fitted on the guide post 21. An adhesive is applied to the sleeve 22B and press-fitted and fixed to the through hole 14 of the stripper plate 13, and then the first sleeve 22A that is fitted around the guide post 21 is applied to the through hole 15 of the punch plate 11 by applying an adhesive. It is press-fitted and fixed. As a result, the stripper plate 13 is linearly guided on the same axis as the punch plate 11 by the left and right guide posts 21.

  A punching die P is disposed on the lower surface of the punch plate 11. The stripper plate 13 is provided with a through hole 16 through which the punching die P of the punch plate 11 passes. The die plate 12 is provided with a receiving die D on which the punching die P of the punch plate 11 is matched. A spring (biasing member) 5 is attached between the punch plate 11 and the stripper plate 13. The spring 5 is disposed between the punching die P and the linear motion bearing 2 and is attached to the left and right respectively. Each spring 5 has one end fixed to the lower surface of the punch plate 11 and the other end fixed to the upper surface of the stripper plate 13.

Each spring 5 expands when the punch plate 11 is lifted by a drive system (not shown), and the tip of the punching die P is inserted into the through hole 16 of the stripper plate 13 so that the stripper plate 13 is suspended. . Further, each spring 5 is compressed when the punch plate 11 is lowered by a drive system (not shown), and the point of the punching die P is placed on the stripper plate in a state where the stripper plate 13 clamps the workpiece W between the receiving die D and the spring 5. 13 through the through-holes 16.
Further, a protrusion 4 for pressing the workpiece W is provided on the lower surface of the stripper plate 13.
As described above, the punching unit 1 shown in FIG. 1 is assembled.

  With reference to FIGS. 1 and 2, when the workpiece W is punched by the punching unit 1 having the above-described configuration, the workpiece W is placed on the receiving die D of the die plate 12 by a conveyance system (not shown) or manually. The punch plate 11 is lowered by a drive system (not shown) (see FIG. 1). Then, the stripper plate 13 is lowered by being guided by the left and right guide posts 21 that guide the punch plate 11, and the stripper plate 13 clamps the workpiece W with the receiving die D. At this time, the workpiece W is also pressed down by the protrusion 4 protruding from the lower surface of the stripper plate 13. When the punch plate 11 is subsequently lowered in this workpiece clamped state, the tip of the punching die P protrudes from the through hole 16 of the stripper plate 13 against the urging force of the spring 5, and the workpiece W is punched (FIG. 2). reference). Thereafter, when the punch plate 11 is raised by a drive system (not shown), the stripper plate 13 is suspended by the left and right springs 5 with the pointed end of the punching die P immersed in the through hole 16 of the stripper plate 13. Raise. In this way, one cycle of the workpiece W punching is completed.

  As described above, according to the punching unit 1 according to the embodiment, the first sleeve 22A, the first retainer 23A, the second sleeve 22B, and the second retainer 23B are disposed on the guide post 21 of the linear motion bearing 2, and the first By fixing the punch plate 11 to the first sleeve 22A and the stripper plate 13 to the second sleeve 22B, the left and right linear motions fixed to the die plate 12 without using the guide rod 105 as in the conventional apparatus 100 The punch plate 11 and the stripper plate 13 can be easily linearly guided on the same axis by the guide post 21 of the bearing 2. Therefore, the straight advanceability of the punch plate 11 and the stripper plate 13 in the same direction can be easily and stably ensured. As a result, the smoothness and flatness of the processed surface of the workpiece W can be ensured.

  Further, since the punching unit 1 of the present embodiment does not have the guide rod 105 like the conventional device 100, the punching unit 1 is not stopped due to the breakage of the guide rod 105. .

  In addition, the punch plate 11 and the stripper plate 13 are connected to each other by the spring 5 having the predetermined urging force described above, so that the punch plate 11 and the stripper plate 13 It is possible to easily achieve individual strokes. Accordingly, the punching unit 1 can be simplified as compared with the case where the guide rod 105 is provided, and the apparatus cost can be reduced.

In addition, this invention is not limited only to the said embodiment, A various change is possible within the scope of this invention.
For example, the punch plate 11 may be disposed on the lower side and the punch plate 11 may be moved up and down. At this time, when the spring 5 brings the punch plate 11 and the die plate 12 close to each other, the punching die P of the punch plate 11 is connected to the stripper plate 13 while the workpiece W is clamped between the stripper plate 13 and the die plate 12. The elastic force is set so as to protrude from the through hole 16 and punch the workpiece W.
The spring 5 may be attached between the die plate 12 and the stripper plate 13. However, in this case, the die plate 12 is disposed on the lower side and the die plate 12 is moved up and down. The elastic force of the spring 5 is set as described above.
Further, the upper punch plate 11 is fixed to the guide post 21 of the linear motion bearing 2, and the lower die plate 12 is fixed to the first sleeve 22A (in this case, the first sleeve 22A is the second sleeve for fixing the stripper plate 13). The die plate 12 may be moved up and down.
As the linear motion bearing 2, the guide post 21 may have a circular outer peripheral shape. In this case, each sleeve 22 and each retainer 23 also has a circular shape similar to the circular cross section of the guide post 21.
Further, the rolling element held by the retainer 23 may be a ball.

It is a partial cross section figure which shows the structure in the mold opening state of the punching unit which concerns on embodiment. It is a partial cross section figure which shows the structure in the mold clamping state of the punching process unit which concerns on embodiment. It is a partial cross section figure which shows the structure in the mold opening state of the conventional press apparatus. It is a partial cross section figure which shows the structure in the clamping state of the conventional press apparatus.

Explanation of symbols

1 Punching unit 2 Linear motion bearing 3 Roller (rolling element)
4 Protrusion 5 Spring (biasing member)
11 Punch plate 12 Die plate 13 Stripper plate 16 Through hole 21 Guide post 22A First sleeve 22B Second sleeve 23A First retainer 23B Second retainer D Receiving die P Punching die

Claims (5)

A cylindrical or columnar guide post;
A cylindrical sleeve that moves relatively in the axial direction around the guide post; and
A retainer for holding a plurality of rolling elements that roll in the axial direction between the outer peripheral surface of the guide post and the inner peripheral surface of the sleeve;
A linear motion bearing, wherein two or more of the sleeve and the retainer are disposed for one guide post. A stripper plate for clamping a workpiece is disposed between the punch plate and the die plate, a punching die is disposed in the punch plate, and a punching die provided in the punch plate passes through the stripper plate. A punching unit provided with a through hole,
Comprising at least two or more linear motion bearings according to claim 1,
A guide post of the linear motion bearing is fixed to the die plate;
A first sleeve of the linear motion bearing is fixed to the punch plate;
The punching unit, wherein the second sleeve of the linear bearing is fixed to the stripper plate. A stripper plate for clamping a workpiece is disposed between the punch plate and the die plate, a punching die is disposed in the punch plate, and a punching die provided in the punch plate passes through the stripper plate. A punching unit provided with a through hole,
Comprising at least two or more linear motion bearings according to claim 1,
A guide post of the linear motion bearing is fixed to the punch plate;
A first sleeve of the linear bearing is fixed to the die plate;
The punching unit, wherein the second sleeve of the linear bearing is fixed to the stripper plate. In the punching unit according to claim 2 or 3,
A punching processing unit, wherein the punch plate punching die punches the workpiece after the stripper plate presses the workpiece against the die plate. The punching unit according to any one of claims 2 to 4,
A biasing member is attached between the punch plate and the stripper plate, or between the die plate and the stripper plate,
When the punch plate and the die plate are brought close to each other, the punching die of the punch plate is inserted from the through-hole of the stripper plate in a state where the stripper plate clamps a workpiece between the die plate and the punch plate. A punching processing unit characterized in that an elastic force is set so as to protrude and punch the workpiece.

Images