JP5364453B2 - Clamping device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clamp device capable of performing work in a short time. <P>SOLUTION: The clamp device 10 in which works 11, 70 are pressed to a table surface 12 by clampers 30, 56 includes the clampers 30, 56 with different shape corresponding to the shape of the works 11, 70 such that central axes 59 of the plurality of clampers 30, 56 are superposed with each other. As a result, the clampers 30, 56 selected suitable for the shape of the works 11, 70 are ascended. Namely, since the plurality of clampers 30, 56 are provided on the same central axis 59, exchange of the clampers 30, 56 is not required. Thereby, shortening of the working time can be attained. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a clamp device that holds a workpiece.

  In the cutting process, it is essential to secure the workpiece in order to ensure the positional accuracy of the cutting site and to cope with the cutting force applied to the workpiece. A clamping device is used to fix the workpiece. Various types of clamp devices have been proposed (see, for example, Patent Document 1 (FIG. 5)).

Patent document 1 is demonstrated based on the following figure.
As shown in FIG. 5, a cylinder block 103 as shown by an imaginary line is placed on the legs 102, 102 provided on the table surface 101. After clamping the clamper 105 against the upper surface of the cylinder block 103, the cylinder block is processed.

By the way, when the workpiece is a cylinder block, there are a block for an in-line engine whose upper surface is a horizontal plane, and a V-type engine block whose upper surface is a slope.
In order to clamp the cylinder block of the V-type engine, it is necessary to use a slope clamper. That is, it is necessary to replace the clamper 105 with a slope clamper. Each time the type of engine changes, it is necessary to replace the clamper, which complicates the machining work of the cylinder block.

  A clamping device that can easily perform a machining operation is desired.

JP-A-10-71535

  It is an object of the present invention to provide a clamping device that can easily perform a machining operation.

The invention according to claim 1 is a clamp device that presses a workpiece against a table surface by a clamper,
This clamping device is provided with a deformed clamper corresponding to the shape of the workpiece so that the central axes of these clampers overlap each other ,
The workpiece is a cylinder block of an in-line engine whose upper surface is a horizontal surface, and a cylinder block of a V-type engine whose upper surface is a slope with respect to a horizontal plane,
The first clamper for clamping the cylinder block of the in-line engine is connected to an actuator for raising and lowering the first clamper,
The second clamper for clamping the cylinder block of the V-type engine is connected to the actuator via a lifting shaft locking mechanism for clamping the lifting shaft of the actuator .

In the invention according to claim 2 , a plurality of types of V-type engine cylinder blocks are used as the cylinder block of the V-type engine.
The cylinder blocks of these multiple types of V-type engines have different slope angles with respect to the horizontal plane,
The second clamper includes a tapered block having a plurality of tapered surfaces formed at different angles with respect to a horizontal plane in accordance with the inclined surfaces of the cylinder blocks of the plurality of types of V-type engines. .

  According to the first aspect of the present invention, the odd-shaped clamper corresponding to the shape of the workpiece is provided so that the central axes of the plurality of clampers overlap. The selected clamper is lowered according to the shape of the workpiece. That is, since a plurality of clampers are provided on the same central axis, there is no need to replace the clampers. As a result, the machining operation can be simplified and the working time can be shortened.

  In addition, the central axes of the plurality of clampers overlap. This eliminates the need for a device for exchanging the clamper, such as a device for exchanging the clamper by rotating a table that supports the clamper. This simplifies the clamping device.

In addition, in the first aspect of the invention, the first clamper is connected to an actuator for raising and lowering the first clamper, and the second clamper is connected to the actuator via an elevation shaft locking mechanism for clamping the elevation shaft of the actuator. Connected to When the first clamper is lifted or lowered, the lift shaft locking mechanism is opened, and when the second clamper is lifted or lowered, the lift shaft locking mechanism is clamped. The clamper can be selected by switching between the clamp and release of the lift shaft. For this reason, only one actuator for raising and lowering the clamper is required, which contributes to a reduction in the number of parts.
The invention according to claim 2 is advantageous because it can cope with a plurality of V-type engines having different cylinder mounting angles with a single taper block.

It is a figure showing the whole clamp device concerning the present invention. FIG. 2 is a sectional view taken along line 2-2 of FIG. FIG. 3 is a three-part enlarged view of FIG. 2. It is action | operation explanatory drawing of the clamp apparatus which concerns on this invention. It is a figure explaining the basic principle of the prior art.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

Embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, for example, a clamping device 10 straddles a work table 13 for carrying out a work processing work by placing a first work 11 having a horizontal upper surface placed on a table surface 12, and the work table 13. The two support columns 14 are arranged in such a way as to be separated from each other in the front and back direction of the drawing, the support beams 15 and 15 are extended over the support column 14 and extended in the front and back direction of the drawing, and are supported by the support beams 15 and 15. And an elevating mechanism 20 for elevating and lowering the clamper (reference numerals 30 and 56 in FIG. 2).

A lift shaft 21 is connected to the lift mechanism 20, and a linear encoder 22 that measures the height position or the lift amount of the lift shaft 21 is provided.
In addition, the 1st workpiece | work 11 whose upper surface is horizontal is demonstrated below by taking the cylinder block of an in-line engine as an example.

Details of the lifting mechanism 20 according to the present invention will be described with reference to the following drawings.
As shown in FIG. 2, the lifting mechanism 20 includes a base plate 23 attached to the support beam 15, a vertical frame 24 standing on the base plate 23, a top plate 25 attached to the upper end of the vertical frame 24, A top plate 26 mounted on the top plate 25, a cylinder 28 as an actuator provided at the center (right and left center) of the top plate 26 and having a piston rod 27 directed downward, and a piston rod 27 of the cylinder 28 A lifting shaft 21 that extends downward from the lifting shaft 21 and moves up and down by the action of the cylinder 28, a first clamper 30 that is provided at the lower end of the lifting shaft 21 and presses a work whose upper surface is horizontal, A cylindrical member 31 that is fitted (can be raised and lowered), a support member 34 that surrounds the cylindrical member 31, and an upper surface of the support member 34 that surrounds the lifting shaft 21 A lift shaft locking mechanism 35 that is attached and prevents the support member 34 from moving in the axial direction with respect to the lift shaft 21, a suspension member 36 that is suspended from the tubular member 31, and a lower end of the suspension member 36. Support plates 37 and 37 that are horizontally provided, taper blocks 43 and 43 that are fixed to the lower surfaces of these support plates 37 and 37 with bolts 38 and 38, and a support member 34 that pass through the base plate 23, It comprises rods 44 and 44 penetrating the plate 26, and rod lock mechanisms 45 and 45 provided on the top plate 26 to prevent the rods 44 and 44 from moving in the axial direction with respect to the top plate 26.

The elevating shaft locking mechanism 35 employs a hydraulic clamper that reduces the diameter by receiving pressure oil supplied by a hydraulic hose 48. The rod lock mechanism 45 also employs a hydraulic clamper that is contracted by receiving hydraulic oil supplied by a hydraulic hose 49.
When there is a concern about the rod 44 falling off the top plate 26, it is desirable to provide a retaining member 51 at the upper end of the rod 44.

  Further, the positioning rod 52 is extended upward from the suspension member 36, the positioning hole 53 is extended from the base plate 23, and the positioning rod 52 is inserted into the positioning hole 53, thereby preventing the suspension member 36 from rotating. Also good. In other words, the positioning rod 52 and the positioning hole 53 constitute a positioning mechanism 54.

  The first clamper 30 is a flat clamp plate 55 arranged in parallel to the horizontal plane, and clamps a first work (FIG. 1, reference numeral 11) whose upper surface is horizontal. The flat clamp plate 55 is formed in a disc shape.

The second clamper 56 that clamps the second work (FIG. 4B, reference numeral 70) whose upper surface is an inclined surface includes a suspension member 36, a support plate 37, and a taper block 43.
The taper of the taper block 43 is formed according to the slope of the second workpiece.

  According to such a clamping device 10, the first clamper 30 or the second clamper 56 is selected according to the shape of the upper surface of the workpiece to be clamped, and the workpiece is clamped by the selected clamper.

  For example, when the workpiece is clamped by the first clamper 30, the lift shaft locking mechanism 35 is opened. When the cylinder 28 is operated when the lift shaft locking mechanism 35 is in the open state, the lift shaft 21 slides inside the lift shaft locking mechanism 35. By operating the cylinder 28 and lowering the elevating shaft 21, the first clamper 30 disposed at the tip is also lowered. The work is clamped by lowering and pressing the flat clamp plate 55 to a position where it contacts the work.

  When the workpiece is clamped by the first clamper 30, the rods 44 and 44 are clamped by the upper rod lock mechanisms 45 and 45. By clamping the rods 44, the support member 34, the lifting shaft locking mechanism 35 placed on the upper surface of the support member 34, and the second clamper 56 disposed on the lower surface of the support member 34 are stationary. ing.

  On the other hand, when the workpiece is clamped by the second clamper 56, the lifting shaft locking mechanism 35 is clamped and the rod locking mechanisms 45, 45 are opened. When the cylinder 28 is operated in this state, the lift shaft locking mechanism 35 is lifted and lowered together with the lift shaft 21. As the elevating shaft locking mechanism 35 is moved up and down, the support member 34 that supports the elevating shaft locking mechanism 35, the rods 44 and 44, the second clamper 56, and the first clamper 30 that are connected to the support member 34 are moved up and down simultaneously. The The work is clamped by lowering and pressing until the taper block 43 contacts the work.

That is, when lowering the second clamper 56, the rods 44 and 44, the support member 34, the lift shaft locking mechanism 35, the lift shaft 21, and the first clamper 30 are lifted and lowered simultaneously.
The clampers 30 and 56 can be selected by switching between the clamp and release of the lifting shaft 21. For this reason, only one actuator for raising and lowering the clampers 30 and 56 is required, which contributes to a reduction in the number of parts.

Further, by providing the support member 34 with the bushes 57, 57, the rods 44, 44 can be raised and lowered smoothly.
The cylindrical member 31 has a flange portion 58 below.

  As is clear from the above description, the central axis 59 when the first clamper 30 is raised and lowered overlaps the central axis 59 when the second clamper 56 is raised and lowered.

The cylinder 28 may be of any hydraulic, pneumatic, or other type of operation other than hydraulic. In other words, any actuator for raising and lowering the clampers 30 and 56 can be used.
The same applies to the lifting shaft locking mechanism 35 and the rod locking mechanisms 45, 45. That is, the operation method can be arbitrarily selected as long as it can switch the clamp and release of the lifting shaft 21 and the rods 44 and 44.
Details of the taper block 43 will be described with reference to the next drawing.

  As shown in FIG. 3, the taper block 43 has a plurality of tapered surfaces 61 and 62 having different angles with respect to the horizontal plane. Accordingly, a plurality of types of second workpieces (reference numeral 70 in FIG. 4A) having different slope angles can be clamped with one taper block 43, which is beneficial.

  In particular, when a cylinder block of a V-type engine is used for a workpiece whose upper surface is inclined with respect to a horizontal plane, a single taper block 43 can handle a plurality of V-type engines having different cylinder mounting angles. Can be beneficial.

  Specifically, a cylinder block of a V-type engine in which the angle at which the cylinder bore axis and the cylinder bore axis intersect is 90 ° is clamped by the first tapered surface 61, and the angle at which the cylinder bore axes intersect is 60 °. A cylinder block of a certain V-type engine can be clamped by the second tapered surface 62.

  In addition, the taper block 43 has a groove 63 on the outer surface side, and the support plate 37 has a protrusion 64 on the outer surface side. A protrusion 64 is fitted in the groove 63. When the taper block 43 is pressed against the workpiece, the taper block 43 receives an inertial force toward the outside. By receiving this force at the protrusion 64, the taper block 43 can be prevented from shifting from the support plate 37.

The taper block 43 is detachably fixed by a bolt 38. When it is necessary to replace the taper block 43 due to its life, it can be easily replaced by removing the bolt 38. Thereby, the maintenance of the clamp apparatus 10 becomes easy.
The operation of the clamping device 10 according to the present invention will be described with reference to the next drawing.

  As shown in FIG. 4A, the first work 11 whose upper surface is horizontal is clamped by lowering the first clamper 30 and pressing the flat clamp plate 55. At this time, the lift shaft locking mechanism 35 is in an open state, and the rod lock mechanisms 45 and 45 are in a clamped state.

At this time, the rotation of the second clamper 56 is restricted by the positioning mechanism 54. When the second clamper 56 rotates, it interferes with the work processing of the workpiece. By restricting the rotation of the second clamper 56 when the first clamper 30 is actuated, the workpiece can be processed smoothly.
When the machining operation of the first workpiece 11 is completed, the first clamper 30 is raised.

Next, as shown in (b), when clamping the second workpiece 70 such as a cylinder block of a V-type engine whose upper surface is an inclined surface, it is clamped by the second clamper 56.
In order to raise and lower the second clamper 56, first, the elevator shaft locking mechanism 35 is brought into a clamped state, and the rod lock mechanisms 45 and 45 are brought into an opened state.
In this state, the second clamper 56 is lowered by operating the cylinder 28.

As shown in (c), the second workpiece 70 is clamped by pressing the taper block 43 of the second clamper 56. The taper surface 62 of the taper block 43 is formed in advance according to the slope of the second workpiece 70.
When the machining operation of the second workpiece 70 is completed, the second clamper 56 is raised.

When the workpiece is changed from the second workpiece 70 to the first workpiece ((a) reference numeral 11), a procedure opposite to the procedure described above may be performed.
That is, the second clamper 56 is raised from the state shown in (c) to the state shown in (b), the rod lock mechanisms 45 and 45 are clamped, and then the lifting shaft lock mechanism 35 is opened.

  The selected clampers 30 and 56 are lowered according to the shape of the workpiece. That is, since the plurality of clampers 30 and 56 are provided on the same central axis (reference numeral 59 in FIG. 2), it is not necessary to replace the clampers 30 and 56. Thereby, the working time can be shortened.

  In addition, the central axes of the plurality of clampers (FIG. 2, reference numeral 59) overlap each other. This eliminates the need for a device for exchanging the clamper, such as a device for exchanging the clamper by rotating a table that supports the clamper. This simplifies the clamping device.

  In addition, although the clamp apparatus which concerns on this invention demonstrated to the example the clamp of the cylinder block in embodiment, a workpiece | work is not restricted to these things.

  The clamping device of the present invention is suitable for a cylinder block machining operation.

  DESCRIPTION OF SYMBOLS 10 ... Clamp apparatus, 11 ... 1st workpiece | work (cylinder block of an in-line engine), 12 ... Table surface, 28 ... Cylinder (actuator), 30 ... 1st clamper, 56 ... 2nd clamper, 59 ... Central axis, 70 ... 1st 2 works (V-type engine cylinder block).

Claims (2)

A clamping device that presses a workpiece against a table surface by a clamper,
This clamping device is provided with a deformed clamper corresponding to the shape of the workpiece so that the central axes of these clampers overlap each other ,
The workpiece is a cylinder block of an in-line engine whose upper surface is a horizontal surface, and a cylinder block of a V-type engine whose upper surface is a slope with respect to a horizontal plane,
The first clamper for clamping the cylinder block of the in-line engine is connected to an actuator for raising and lowering the first clamper,
The clamp device according to claim 1, wherein the second clamper for clamping the cylinder block of the V-type engine is connected to the actuator via a lift shaft locking mechanism for clamping the lift shaft of the actuator . For the cylinder block of the V-type engine, a plurality of types of cylinder blocks of the V-type engine are used,
The cylinder blocks of these multiple types of V-type engines have different slope angles with respect to the horizontal plane,
The second clamper includes a tapered block having a plurality of tapered surfaces formed at different angles with respect to a horizontal plane in accordance with the inclined surfaces of the cylinder blocks of the plurality of types of V-type engines. The clamping device according to claim 1.

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