JP7519042B2 - Work table and vice device of vice - Google Patents

Description

This invention relates to a vice device used to secure multiple workpieces to the table of a machine tool and a work table used with said vice device, and in particular to said vice device and work table that can grip and release multiple workpieces in a single operation and is also suitable for gripping workpieces with an arc-shaped gripping surface.

Here, a vice device refers to a work table that supports a workpiece between the opposing jaws of a vice (a member that abuts against the workpiece with or without a jaw or jaws) or a vice equipped with an intermediate jaw that grips the workpiece.

When machining a workpiece using a machine tool such as a machining center, it is common to fix the workpiece to the table of the machine tool via a vice. When machining a large number of relatively small workpieces, attaching a work table or intermediate jaws to the vice so that a single vice can hold multiple workpieces can improve machining efficiency and work efficiency.

The applicant of the present application has proposed, for example in Patent Documents 1 and 2, a work support table or receiving table used to hold multiple workpieces with one vise. In many cases, such a work support table or receiving table must be prepared according to the shape of the workpiece to be held.

When a workpiece is held in a vice for processing, it is necessary to be able to efficiently carry out setup operations such as gripping and releasing the workpiece. This is particularly important when multiple workpieces are held in a single vice for processing. The gripping and releasing of multiple workpieces held in the vice can be performed all at once, for example, using fluid pressure, but this creates problems such as the need to change the setup of the fluid piping when the workpiece is changed.

Japanese Patent Application Publication No. 11-170134 Japanese Patent Application Publication No. 11-300562

When multiple workpieces are held in a single vise for processing, it is important that the workpieces can be held and released quickly and with simple operations, that the workpieces are held and released uniformly, and that the support or receiving stand to be attached to the vise can be manufactured inexpensively.

The objective of this invention is to provide a work table and a vise device that can open and close multiple workpieces held in a single vise in the usual manner, and can uniformly open and close each of the multiple workpieces at the same time, can reliably hold workpieces with arc-shaped gripping surfaces, and can provide the device at low cost.

The work table 3 of this invention is a work table that is attached to the work table of a machine tool and supports two or more workpieces by mounting it on the two opposing jaws 2 (2a, 2b, 2c) of a vice 1 that secures a workpiece, typically on the base 11 of the vice between the fixed jaw 2a and the movable jaw 2b.

The work table 3 of this invention comprises a pedestal 31 that is attached to the base 11 of the vice so as to be freely movable in the direction of movement of the movable jaw 2b (hereinafter referred to as the "longitudinal direction"), a seat plate 33 that is guided on the upper surface of the pedestal 31 so as to be slidable in the longitudinal direction, a partition plate 34 erected on the upper surface of the seat plate, and a push rod 41 that pushes the pedestal 31 in a direction separating it from the adjacent jaws 2 (2a, 2b, 2c). The workpiece W to be machined is placed on the seat plates 33 on both sides of the partition plate 34.

The seat plate 33 and the push rod 41 are biased by a compression spring 42 so that they are pushed toward the end face of the base 31. The seat plate 33 is pushed by the compression spring 42, which releases the grip of one of the workpieces Wb on the seat plate, and the difference in the pushing stroke of the push rod and the seat plate releases the grip of the workpiece Wa on the other adjacent jaw 2 side. Therefore, the amount of pushing of the seat plate 33 by the compression spring 42 is smaller than the amount of pushing of the push rod 41, and is preferably 1/2. The compression spring 42 that pushes the seat plate 33 and the push rod 41 can be provided separately or as a single unit.

When one compression spring 42 pushes the seat plate 33 and the push rod 41, the spring 42 can be engaged with the push rod 41 after it is pushed, and the seat plate 33 can be pushed. For example, a protrusion 46 such as a large diameter portion can be formed at the base end of the push rod 41, and after the push rod 41 is pushed by the compression spring 42, the protrusion 46 can be engaged with the seat plate 33 and push the seat plate 33.

By providing a partition jaw 4 that abuts against the workpiece Wb in the longitudinal center of the base 31 and arranging a seat plate 33, a push rod 41, and a compression spring 42 on both sides of the partition jaw 4, a workpiece table 3 that can simultaneously grip and release four workpieces W can be obtained.

The vise device of this invention is a vise device in which multiple work tables 3 of this invention are mounted on a base 11 between the fixed jaw 2a and the movable jaw 2b of the vise, via intermediate jaws 2c that can move freely in the longitudinal direction between adjacent work tables.

The vice device of this invention can grip and release multiple workpieces W all at once by moving the movable jaw 2b of the vice 1 back and forth. It is also possible to equalize the gap that is formed between the workpieces W and the jaws 2, 4 that grip them when the workpieces are released, and it is also easy to automate the attachment and detachment of the workpieces W to the vice device. Furthermore, the work table 3 of this invention has a simple structure and is easy to manufacture, which has the effect of allowing the vice device of this invention to be constructed inexpensively.

Perspective view of the work table Cross-sectional side view of work table Side view of the vice device A perspective view showing an example of a partition base spacer FIG. 1 is a perspective view showing an example of a workpiece;

The present invention will now be described in detail with reference to the drawings showing the embodiments. In FIG. 3, 1 is a vice, 11 is a base of the vice 1, and 3 is a work table attached to the base 11.

An example of a vice device of this invention is shown in Figure 3. The vice 1 comprises an elongated rectangular column-shaped base 11 that is fixed to the work table of a machine tool, a fixed jaw 2a fixed to one end of the base 11, and a movable jaw 2b that moves forward and backward opposite the fixed jaw 2a. Jaws 5a and 5b are attached to the fixed jaw 2a and the movable jaw 2b, respectively.

The movable jaw 2b of the vise 1 in the figure can change its fixed position by the positioning table 12. That is, the movable jaw 2b and the positioning table 12 are movable by being guided by the guide grooves 13 provided on both sides of the base 11, and the positioning table 12 is fixed to the base 11 at a desired position by inserting a pin into one of the base side pin holes 14 ... provided on the side of the base 11 and the positioning table side pin hole 15 provided on the positioning table 12, which is aligned with each other. The movable jaw 2b is screwed into a threaded rod 16 that is immovable in the axial direction but rotatable on the positioning table 12, and by rotating the threaded rod 16, it advances and retreats relative to the positioning table 12 to grip and release the workpiece W (Wa, Wb). By making this advance and retreat stroke larger than the arrangement pitch of the base side pin holes 14, the distance between the fixed jaw and the movable jaw can be changed continuously.

The vise device in Figure 3 is a vise device in which two work tables 3 and one intermediate jaw 2c are attached between the fixed jaw 2a and the movable jaw 2b of the vise 1 having the above structure. The work tables 3 and the intermediate jaw 2c are attached so as to be freely movable in the longitudinal direction of the base 11.

Figures 1 and 2 show the details of the work table 3 attached to the vice device in Figure 3, where 31 is the base of the work table 3, 32 is a partition jaw that is part of the base 31, 4 is a partition jaw affixed to the partition jaw 32 so as to be replaceable according to the dimensions of the work, 33 is a seat plate attached to the upper surface of the base 31 so as to be freely slidable in the longitudinal direction, 34 is a partition plate fixed to the seat plate 33, 41 is a push rod that passes through the seat plate 33 so as to be freely movable back and forth in the longitudinal direction, and 42 is a compression spring interposed between the base of the push rod 41 and the partition jaw 32.

The work table 3 shown in the figure is designed to be able to simultaneously grip and release four workpieces W (Wa, Wb) by symmetrically arranging the seat plate 33, push rod 41, and compression spring 42 on both longitudinal sides of the partition jaw 4, and with the structure on only one side, it is possible to make a work table capable of gripping and releasing two workpieces W simultaneously.

The base 31 has a guide section that slidably fits into the base 11 of the vise, and has guide rails 35 on both sides of the upper edge that slidably guide the seat plate 33. A notch 36 is provided in the width direction (perpendicular to the longitudinal direction) in the center of the top surface of the base 31, and the partition jaw 32 is positioned and fixed in this notch 36 with a key 37. The partition jaw 32 is fixed to the partition jaw 32 so that it can be replaced according to the dimensions of the workpiece Wb. The partition jaw 32, which is part of the base 31, has a split structure in order to enable machining of the longitudinal guide rails 35.

The seat plate 33 is a member that serves as a seat for the workpiece W, and is slidably attached to the guide rail 35 of the base 31. The partition plate 34 provided on the upper surface of the seat plate 33 is provided to enable stable gripping of two workpieces, particularly a workpiece W with an arc-shaped gripping surface.

The base 31 and seat plate 33 must be long enough that even when a workpiece with a minimum longitudinal dimension (a workpiece with a minimum dimension B in FIG. 5) is placed on the seat plate 33, the edge E of the workpiece protrudes from the base 31 and seat plate 33. In other words, when the workpiece W on the seat plate 33 is gripped by the vise 1, the jaws 2 must be long enough to abut against the workpiece W before abutting against the base 31 or seat plate 33.

The seat plate 33 has a longitudinal through hole 44 with a large diameter spring storage section 43 on the partition jaw 4 side, and the push rod 41 is slidably inserted through this through hole with its large diameter protrusion 46 stored in the spring storage section 43. The spring storage section 43 stores a compression spring 42 between the base end of the push rod and the partition jaw 32, which is part of the base 31, to bias them in the direction of separation.

When the compression spring 42 is expanded, it pushes the push rod 41 to a position where its tip 47 slightly exceeds the edge E of the workpiece Wa on the seat plate 33, and during the pushing movement, the protrusion 46 of the push rod abuts against the engagement surface 45 that forms the bottom surface of the spring storage section 43, pushing and moving the seat plate 33. The amount of pushing of the seat plate 33 determines the opening amount of the workpiece Wb on the partition jaw 4 side, and the degree to which the tip 47 of the push rod exceeds the edge E of the workpiece Wa determines the opening amount of the workpiece Wa on the fixed jaw 2a and intermediate jaw 2c sides. The opening amount referred to here is the dimension corresponding to the gap dimension required to attach and detach the workpiece W from the seat plate 33.

The work table 3 of the above structure is mounted on the base 11 between the fixed jaw 2a and the movable jaw 2b of the vise 1, as shown in Figure 3. When multiple work tables 3 are mounted, the intermediate jaw 2c is mounted between them. The intermediate jaw 2c and the work tables 3 on the movable jaw 2b side of the intermediate jaw 2c need to be mounted on the base 11 so that they can move in the longitudinal direction, i.e., in the direction of gripping and releasing the work W.

The vise 1 in Figure 3 comprises a long, slender, rectangular base 11 that is fixed to the work table of a machine tool, a fixed jaw 2a fixed to one end of the base 11, a movable jaw 2b that moves forward and backward opposite the fixed jaw 2a, and a positioning table 12. The base 11 has guide grooves 13 on both sides. The positioning table 12, the movable jaw 2b, the work table 3, and the intermediate jaw 2c each have a guide portion that fits slidably with the base 11.

The positioning table 12 can be fixed to the base 11 at a desired position by inserting a pin into a circular hole that aligns one of a number of base-side pin holes 14... on the side of the base 11 with a positioning-table-side pin hole 15 on the positioning table 12. The movable jaw 2b is screwed into a threaded rod 16 that is rotatably mounted on the positioning table 12 and cannot move axially. By rotating the threaded rod 16, the movable jaw advances and retreats relative to the positioning table 12 to grip and release the workpiece W (Wa, Wb). By making this advance and retreat stroke larger than the arrangement pitch of the base-side pin holes 14, the distance between the fixed jaw and the movable jaw can be changed continuously.

In the vise device of FIG. 3, when the workpiece W is inserted between the partition plate 34 of the two work tables 3 and the jaws 2 (2a, 2b, 2c) and partition jaw 4, and the movable jaw 2b is advanced in the direction of gripping the workpiece, the tip 47 of the push rod 41 first comes into contact with the movable jaw 2b, intermediate jaw 2c, and fixed jaw 2a, compressing the compression spring 42 and coming into contact with the edge E of the workpiece Wa on the jaw 2 side. When the movable jaw 2b advances further, the partition plate 34, and therefore the seat plate 33, are pushed through the movable jaw 2b, intermediate jaw 2c, and fixed jaw 2a side workpiece Wa, and the workpiece Wb on the partition jaw 4 side comes into contact with the partition jaw 4. In this state, the desired gripping force is applied to the movable jaw 2b, and all the works on the two work tables are fixed.

After the workpiece is machined, the movable jaw 2b is opened, and the pushing rod 41 advances due to the biasing force of the compression spring 42, releasing the workpiece Wa on the movable jaw 2b, intermediate jaw 2c, and fixed jaw 2a side. Then, the protrusion 46 of the pushing rod 41 abuts against the engagement surface 45, which is the bottom surface of the spring storage section 43, pushing and moving the seat plate 33, releasing the workpiece Wb on the partition jaw 4 side, and forming the gap required for attaching and detaching the workpiece between the gripping surface of the workpiece W and the jaws 2 and 4.

When gripping a workpiece with a different dimension in the gripping direction (dimension B in Figure 5), the above-mentioned gap required for attaching and detaching the workpiece can be made constant by replacing the partition jaw 4 or fitting a spacer 48, for example as shown in Figure 4, to the partition jaw 4. In other words, the partition jaw 4 should be of a dimension such that the distance from the center of the partition jaw 4 to the partition plate 34 when gripping the workpiece is constant.

The work table and vice device of this invention can simultaneously grip and release multiple workpieces with a single operation, has a simple structure, and can be provided relatively inexpensively. Furthermore, since the gap between the workpiece and the partition plate or jaws when the grip of the workpiece is released can be set relatively accurately, reliable attachment and detachment operations are possible even when the attachment and detachment of the workpiece is automated. In addition, even a workpiece with an arc-shaped edge, as shown in Figure 5, can be stably gripped and fixed.

The work table 3 shown in the embodiment is designed to be able to grip four workpieces, two on each side of the partition jaw 4, but if the partition jaw 4 is split in the center, for example, it can be used to grip two workpieces. Also, in the embodiment shown in the figure, the push rod and seat plate are moved forward and backward by one compression spring, but it is also possible to move each forward and backward by a separate compression spring.

REFERENCE SIGNS LIST 1 vise 2 (2a, 2b, 2c) jaw 3 work table 4 partition jaw 11 base 31 base 32 partition jaw 33 seat plate 34 partition plate 41 push rod 42 compression spring 43 spring storage section 44 through hole 46 convex portion W (Wa, Wb) work

Claims (3)

In a work table that is mounted between two opposing jaws of a vice and supports a workpiece,
a base that is attached to the vise and is movable in a moving direction of a movable jaw of the vise;
Two seat plates are attached to the upper surface of the base so as to be movable in the direction , and the seat plates are provided with partition plates for separating two workpieces supported in a juxtaposed manner in the moving direction with a partition jaw protruding from the upper surface of the base sandwiched therebetween;
a through hole in the moving direction provided in the seat plate, the partition jaw side end portion being a large-diameter spring housing portion;
a push rod having a protrusion at a base end housed in the spring housing and a tip end protruding from the seat plate and inserted into the through hole, the push rod being movable in the moving direction;
The seat plate is housed in the spring housing portion , and is pushed in the moving direction by the engagement surface, which is the bottom surface of the spring housing portion, coming into contact with the protrusion .
a compression spring that moves the push rod in the same direction with a stroke larger than the stroke of the seat plate;
a partition jaw fixed to the partition jaw and protruding higher than the upper surface of the seat plate;
Equipped with
Vice workbench . 2. A work table as described in claim 1, further comprising a partition jaw attached to the center of the movement direction of the upper surface of the partition jaw , which is part of the base, and the seat plate, compression spring and push rod are symmetrically arranged on both sides of the partition jaw . A vice device in which an intermediate jaw that can be moved in the same direction as the movement direction of the movable jaw of the vice is attached to the base of the vice between the fixed jaw and movable jaw of the vice, and a work table as described in claim 1 or 2 is attached to the fixed jaw side and movable jaw side of the intermediate jaw so as to be freely moved in the movement direction.

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