JP5903480B2 - Cam device grouping method - Google Patents

Description

The present invention relates to a grouping method for compactly unitized cam devices that are mounted between a fixed mold and a movable mold in order to drill holes in a workpiece .

In the design of a press die, it is necessary to arrange various functional units such as a cam device, a guide post, a workpiece detection device, and a carry-out conveyance device without interfering with each other. Specialized manufacturer of functional units so that this mold designers easily is the various units is standardized, and, in addition to the specifications Tsu had its outer shape and movement and load capacity, the catalog detail It was posted. In particular, in the cam device, after completion of the mold operation, the cam device does not exhibit the endurance according to the specification due to the contact of the sliding surface of the cam device due to the mounting error when fixed to the mold, and the cam device is camped at short intervals. The device was being replaced.

JP 2000-135526 A

The processing force required for the cam device for press dies varies depending on the workpiece (workpiece) material and plate thickness as well as the mounting position of the processing tool on the cam slider of the cam device. The machining force that can be tolerated as a cam device becomes smaller as it deviates from the center. Therefore, in the conventional cam device, the size of the cam device changes each time the thickness of the workpiece (workpiece), the material, and the mounting position of various functional units change in the mold design process. The burden on the designer for the design change was increased. In addition, frequent replacement of the entire cam device can be used to reduce the durability of the cam device due to errors in the work (workpiece) material, plate thickness, mold manufacturing and mounting errors that occur after the mold is in operation. It was .

The present invention includes a cam holder having a cam holder sliding surface, and the cam slider sliding contact surface for sliding contact with the cam holder over sliding contact surface, and the cam slider cam surface, and to have a tool mounting surface for machining tool a cam slider that, abut against the cam slider over the cam surface, a grouping method of a cam apparatus having a cam driver having a cam driver cam surfaces you drive the cam slider in a predetermined processing direction, different phases A plurality of cam devices having a processing force are included, and a plurality of cam devices have the same outer size.

The cam holder sliding contact surface is detachable from the cam holder, and the cam driver cam surface is detachable from the cam driver. The cam holder sliding surface is a sliding member that is detachable from the cam holder and has the same shape and compatibility within the same series (group) of the same outer shape; The cam surface member is detachable from the cam driver and has the same shape and compatibility within the same series (group) having the same outer shape.

Further, when the combination of the material of the cam slider sliding contact surface and the cam holder sliding contact surface is the same as that of the cam driver cam surface and the cam slider cam surface, the cam slider sliding contact surface and the cam holder sliding contact The surface roughness after finishing the contact surface is made rougher than the cam driver cam surface and the cam slider cam surface, or the solid lubricant filling density of the cam slider sliding contact surface and the cam holder sliding contact surface is set as a cam driver. Including changing the cam surface and the cam slider to be larger than the cam surface.

According to the cam device grouping method of the present invention, the change of the entire cam device can be easily replaced .

It is a disassembled perspective view of the cam apparatus 1 of this embodiment . It is a figure which shows the relationship between the processing force and cam width of the cam apparatus 1 of this embodiment .

As shown in FIG. 1, a cam apparatus 1 of this embodiment, the cam surface with the cam holder 2 with sliding surface 2a, is movable by sliding contact surfaces 3a in sliding contact with the sliding contact surface 2a of the cam holder 2 a cam slider 3 you move in a predetermined processing direction in 3b, is composed of a cam driver 4 moving the cam slider 3 in a predetermined processing direction has a cam surface 4a in contact with the cam surface 3b of the cam slider 3 The

Wear properties of the sliding contact surface 3 a of the sliding contact surface 2a and the cam slider 3 Mosquito Muhoruda 2, if the surface pressure of the sliding portion is constant, the sliding member 2b and sliding portion 3c of the cam slider 3 material, machining method, heat treatment, determined more combinations each loading further relative sliding contact surface 2a or sliding surface 3a of the solid lubricant.

Wear Properties of the cam surface 3 b of the cam surface 4a and the cam slider 3 of the cam driver 4 as well, if the surface pressure of the sliding portion is constant, the cam of the cam surface member 4b and the cam slider 3 of the cam driver 4 the material of the surface 3c, processing method, heat treatment, determined more combinations each packing density further relative to the cam surface 4a or the cam surface 3b of the solid lubricant.

Therefore, if the material of the sliding part, the processing method, and the cam width, which is the basic dimension of the cam device, are selected according to the purpose, the cam device of the same outer shape has a large processing capacity, slow wear progress, and within the same rank. The maximum machining force at 1 can be set larger than the lowest machining force of the cam device of one rank higher. FIG. 2 shows an example of the combination, and other combinations are possible. Although not shown in FIG. 2, by changing the processing method for the control of slow wear progresses, increasing the initial wear by processing coarsely surface roughness of the processing surface if example embodiment, or solid lubricants Although increasing the packing density of the progression of wear earlier, also include destructive combinations other way damage was Tsu had for securing causes of no stable friction耗特resistant material such as seizure.

Therefore, in order to improve the machining force of the cam device after the mold is operated by exchanging parts, it is necessary not to replace the cam slider that requires adjustment of the accuracy of machining tools such as piercing punches for drilling. as shown in 1, and the cam holder 2 is a main body of the sliding portion 2b is formed in the sliding member of another member, and, on the mounting surface of the cam holder 2 of the main body side, removably with bolts or the like A sliding member is attached .

Similarly, the cam slider 3 and the cam driver 4 as shown in FIG. 1, come in that the cam surface member 4b is cam member to the cam driver base portion 4c is easily replaced with a bolt to a removable, Cost does not increase .

As shown in FIG. 1, the wear of the cam surface 4 a of the cam driver 4 and the cam surface 3 b of the cam slider 3 attaches a machining tool (such as a punch or a bending tool) to the tool mounting surface 3 e of the cam slider 3. is, and the relative positional accuracy between the working tool and the workpiece (workpiece) because the high accuracy adjustment is Ru is required, it is Ru are required small. On the other hand, to the V-groove-shaped cam surface 3b and the fitting-sliding cam slider 3 becomes mountain-shaped cam surface 4a of the cam driver 4.

Ca and the cam surface 3b and the cam surface 4a of the cam driver 4 of arm slider 3, fixed in position by V-shaped grooves, with respect to the contact without contact almost piece, sliding contact surface 3a and the cam holder 2 of the cam slider 3 the sliding contact surface 2a, the error corresponding to the machining error of the mounting errors and the mold of the cam, so-called partial contact in the plane between the sliding contact surface 2a of the sliding contact surface 3a and the cam holder 2 of the cam slider 3 Occur. In order to eliminate this contact, it is necessary to prevent the contact surface pressure from becoming excessive by increasing the contact area due to the familiarity during the initial wear period.

Therefore , compared with the wear characteristics of the cam surface 4a of the cam driver 4 and the cam surface 3b of the cam slider 3, the wear characteristics of the slide contact surface 3a of the cam slider 3 and the slide contact surface 2a of the cam holder are the same surface pressure × The wear characteristic is such that the initial wear is large with respect to the sliding speed and the wear amount with respect to the sliding distance is large. This ensures that the rubbing surface 2a, the expansion of the contact area due familiar with initial wear period by 3a (i.e., elimination of partial contact) is advanced, it is possible to prevent excessive sliding surface 2a, 3a of the contact surface pressure. Further , by reducing the wear on the cam surfaces 3b and 4a, the relative positional accuracy between the machining tool of the cam slider 3 and the workpiece (workpiece) can be satisfied .

If the combination of the cams sliding surface 2a of the sliding contact surface 3a and the cam holder slider 3 is the cam surface 4a and the cam slider 3 of the cam driver 4 cam surface 3b and materials are the same, the sliding of the cam slider 3 The surface roughness after finishing of the surface 3a and the sliding surface 2a of the cam holder is made rougher than the cam surface 4a of the cam driver 4 and the cam surface 3b of the cam slider 3 , or the sliding surface 3a of the cam slider 3 This can be dealt with by changing the filling density of the solid lubricant on the sliding surface 2 a of the cam holder larger than the cam surface 4 a of the cam driver 4 and the cam surface 3 b of the cam slider 3 . Of course, changing the combination of sliding materials is also effective for this purpose.

Cams apparatus 1, each width of the cam, as shown in Table 1 (e.g., minimum, small, medium, slightly large, large, largest) the working force (the drilling and bending the material and thickness of the member to be processed such as Depending on the material combination of the sliding part (for example, low surface pressure, normal surface pressure, slightly high surface pressure, high surface pressure), select light, normal, slightly heavy, and heavy. it can. By selecting the cam width, the maximum processing force in a group with a certain cam width (referring to the maximum processing force corresponding to “(d) weight” in the group) is adjacent to the cam width by one group. Is set to be larger than the minimum processing force of the group (refers to the smallest processing force corresponding to “(e) light” in the group), and covers to compensate.

As described above, in the cam device having the adjacent width, for example, the processing force of the small cam device having the specification “heavy” is the processing force of the next smaller cam device having the specification “light”. is set larger, the substitute is rather effective between the next width of the cam device (see FIG. 2).

Another member shown in Figure 1, the elastic members 5 for the return, the extension rod 5a, for prevention stopper 6, the slide keeper 7 is forced back follower 8. The return elastic member 5 is, for example, a gas pressure cylinder, a coil spring, or the like. In Figure 1 we use gas pressure cylinder, the extension rod 5a into contact with the forward wall of the cam holder 2, and returns the elastic by Ri cam slider the resilient force of the member for returning to the initial position.

Scan topper 6 is a wall cam slider 3 to be hung neck portion by the slide keeper 7 is prevented from being come out backward. The slide keeper 7 is fixed to both side walls of the cam holder 2 and sandwiches the neck portion of the cam slider 3 with an L-shaped locking portion below the cam keeper 7 so that the cam slider 3 can slide in the front-rear direction and the vertical direction. Suspend on . The forced return follower 8 engages with the guide groove on the cam driver 4 side to forcibly move the cam slider 3 toward the initial position when the processing tool of the cam slider 3 is caught on the workpiece and is not easily pulled out .

According to the cam device 1 of the present embodiment , the cam holder 2 reciprocates in the vertical direction together with the upper mold of the mold from the top dead center to the bottom dead center, whereby the cam slider 3 is processed along the front-rear direction. Reciprocated in the direction. As a result, the machining tool provided on the tool mounting surface 3e of the cam slider 3 moves in the machining direction and performs, for example, drilling or bending on the workpiece placed on the mold . As a result, a certain amount of wear due to sliding occurs in the sliding portion constituted by the sliding contact surface 2a and the sliding contact surface 3a and in the sliding portion constituted by the cam surface 3b and the cam surface 4a.

In this embodiment , the wear of the sliding portion constituted by the sliding contact surface 2a and the sliding contact surface 3a progresses at an early stage, and the mutual contact between the sliding contact surface 2a and the sliding contact surface 3a due to mold processing and assembly errors. It is possible to eliminate the per contact of the sliding portion at the initial stage of the mold operation, and to exhibit the processing capability according to the specifications of the cam device.

Further, since the set smaller than the abrasion loss of the sliding surface 2a and the sliding contact surface 3a of the wear of the cam surface 3b and the cam surface 4a which defines the movement of the relative positional relationship relative to the work of the working tool (workpiece) , dividing-out takes adverse effects of uneven contact of the running initial, Ru can be reduced positional accuracy change of the machining tool.

In addition, when the wear of the sliding contact surface exceeding the initial assumption of the mold design occurs after the mold is operated, the material of the original design so that the sliding member 2b or the cam surface member 4b is a combination with less wear. It is possible to cope with wear exceeding the assumption by exchanging with parts of the same shape different from the above. Further, the replacement work can be easily performed with bolts, and the machining accuracy of the cam device 1 is ensured to be constant . Further, since the machining forces of the adjacent cam devices overlap each other for each width of the cam device, changes in the entire cam device can be easily replaced .

The cam device 1 of the present embodiment achieves a reduction in design time and a burden on the designer at the mold design stage, and a slight machining of the mold that is inevitable to the mold, which occurs after the mold is operated, This reduces the man-hours required for mold maintenance by preventing the malfunction caused by the error of the cam device while maintaining the machining accuracy at a high level. Furthermore, the performance improvement can be easily performed by exchanging parts, the machining accuracy can be maintained with high accuracy, and it can be used for various types of processing tools.

1 cam device,
2 cam holder, 2a sliding surface,
2b sliding member,
3 cam slider, 3a sliding contact surface,
3b cam surface, 3c sliding part,
3d cam face,
4 Cam driver, 4a Cam surface,
4b cam surface member, 4c driver base,
5 return elastic member, 5a extension rod,
6 Stopper stopper,
7 Slide keeper,
8 Forced return follower.

Claims (3)

A cam holder having a cam holder sliding contact surface;
A cam slider having a cam slider sliding surface that is in sliding contact with the cam holder sliding surface, and a cam slider cam surface, and a cam slider having a tool mounting surface for a processing tool;
A cam driver having a cam driver cam surface that contacts the cam slider cam surface and drives the cam slider in a predetermined processing direction,
Including a plurality of cam devices having different processing forces, and forming a group in which the outer sizes of the plurality of cam devices are the same ;
The group comprises a plurality of groups for each outer size of the cam device, and a maximum working force of a cam device included in an arbitrary group of the plurality of groups is adjacent to the arbitrary group, and the arbitrary A cam device grouping method, characterized in that it is larger than a minimum working force of a cam device included in a group having a larger outer size than a cam device included in the group. A cam holder having a cam holder sliding contact surface;
A cam slider having a cam slider sliding surface that is in sliding contact with the cam holder sliding surface, and a cam slider cam surface, and a cam slider having a tool mounting surface for a processing tool;
A cam driver having a cam driver cam surface that contacts the cam slider cam surface and drives the cam slider in a predetermined processing direction,
Including a plurality of cam devices having different processing forces, and forming a group in which the outer sizes of the plurality of cam devices are the same;
A cam apparatus grouping method, wherein the cam holder sliding contact surface is detachable from the cam holder, and the material of the cam holder sliding contact surface is changed according to the processing force. A cam holder having a cam holder sliding contact surface;
A cam slider having a cam slider sliding surface that is in sliding contact with the cam holder sliding surface, and a cam slider cam surface, and a cam slider having a tool mounting surface for a processing tool;
A cam driver having a cam driver cam surface that contacts the cam slider cam surface and drives the cam slider in a predetermined processing direction,
Including a plurality of cam devices having different processing forces, and forming a group in which the outer sizes of the plurality of cam devices are the same;
The cam device grouping method according to claim 1, wherein the cam driver cam surface is detachably attached to the cam driver, and a material of the cam driver cam surface is changed according to the processing force.