JPH0335956A - Microfeed device - Google Patents

Abstract

PURPOSE:To manufacture a device at a low-cost and to enable an operator at a site to easily use the device by a method wherein a reaction force generated through expansion and contraction of a spring having a low spring constant is exerted on a structure considered as a spring having a high spring constant to move an object to be positioned. CONSTITUTION:In the microfeed of a bite 7, when a handle wheel 17 is rotated so that a coil spring support part 92 of a shaft is moved leftward, the handle wheel 17 is moved leftward through compression of a coil spring 13, and a moving amount is read by a dial gauge 21. In this case, the reaction force of compression of the coil spring 13 is exerted on a screw part 32 of a bridgeform bite support rest 3, and the bite 7 is moved in a direction reverse to the moving direction of the coil spring support part 92 through resilient deformation of the support rest 3. From the balancing of a force, relation A moving amount LS of the bite 7 is LS=KLKS.DELTALS, wherein KH is the cut direction of the bite 7 of the bridgeform bite support rest 3, KL is the spring constant of the coil spring 13, and DELTALS is a compression amount of the coil spring 13 read by a dial gauge.

Description

DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION (Industrial Field of Application) The present invention relates to a micro-feeding device for positioning objects such as cutting tools in precision machining that requires micro-cuts.

(Prior Art) Conventionally, there have been micro-feeding devices for precise positioning that use piezoelectric elements, air pressure, or extraction pressure as actuators.

(Problem M that the invention sought to solve) Micro-feeding devices that use piezoelectric elements, pneumatic pressure, or hydraulic pressure are basically intended for automatic control and require a control device, and the structure of the actuator part is complicated, etc. This caused the problem that the device was extremely bulky and could not be easily incorporated into a machine tool or the like.

The present invention has been made to solve these problems, and therefore, an object of the present invention is to provide a microfeeding device that can be easily operated by an operator at a processing site and that can be manufactured at low cost.

Configuration of Himei; (Means for solving the problem) The one-stroke small feeding device of the present invention has a small distance +ii in a certain direction.
The positioning object to be moved forward or backward, and the same positioning object is considered as a reference body! A base that fits in the same base and a high point that connects the same base and the positioning object n:j! A support T-fQ for the positioning object, which is regarded as a spring (4. It has a spring (I3) that accommodates 4 out of 1 springs, and a means for measuring (+i+condensed acid) of the spring (B), and moves the positioning object in a certain direction [rI+c] by a minute distance forward or It was characterized by a backward movement.

(Function) In the present invention, a spring with a low spring constant (K
, ), and the object to be positioned is moved by the expansion and contraction of the support means. Since the spring constant of the support means is high, the amount of movement of the positioning object is 1. reduced to

(Example) The following is a detailed description of the example of the present invention based on the drawings.
Explain.

Figure ↓ (a) shows a plan view of the microfeeding device of the present invention,
FIG. 1(o) shows a 1117-plane view taken along line A-A in FIG. 1(a). In FIGS. 1A and 1B, l is a base that is regarded as a fixed body with respect to the object to be positioned. A bridge-shaped tool support 3, which is a support means, is fastened to the base T by a pole h5, and a convex portion 101- in the center of the base 1 is a housing for mounting a bear link 12, 12, and a coil spring 7. >13 guides. In the center of the bridge-shaped tool support base 3, there is a tool storage section 31 for attaching the tool tool 7, which is the object to be positioned, and a tool holder section 31 that serves as the point of application of force for moving the tool tool 7 in the direction of the 1J) insertion. The same hole 32 is opened in the cutting direction of the cutting tool 7. 9 has a shaft, which is inserted into the screw hole 32: Pheasant 1,
1st part 91. Coil spring receiver part 92, slide part 93,
The numbering of handlebars has been prohibited since Section 94. 1L 12
is a bearing that supports the shaft 9 so that it can rotate and slide. 13 is a coiled bam, one end of which connects to the protrusion 10 of the base l via the seat 115 and the bear link 12.
1 so that it does not move in the direction of the shaft (the central axis of IiI19), and the other end of the coil spring bearing of the shaft 9 is supported by a part 92, and the part 92 of the coil spring bearing is supported by a part 92 of the shaft JJ1. ;It is expanded or contracted by moving to +J. 17 is a handle wheel fixed to the shaft 9, and the end surface 1 of the shaft 9 is
71 is a smooth plane perpendicular to the central axis ζ of the shaft 9. One is a handle wheel 17 for rotating the shaft 9.
It is a handle attached to. 21 is a dial gauge, and the tip of its stylus 211 is connected to the end surface 171 of the handle wheel 17.
The amount of axial movement of the handle wheel 17 can be read on the scale.

With the above configuration, the coil spring 13 is in a compressed state.
Most of the male screws of 1lI9 are in the holes 3 of the tool support 3.
It looks like it's screwed into 2.

For minute feeding of the cutting tool 7, the handle wheel 17 is moved to the shaft 9.
The coil spring receiving portion 92 of is moved f? to the left (the direction in which the coil spring 13 is compressed) in FIG. 1(b). Rotate it so that it moves. Due to the compression of the coil spring 13, the steering wheel 1-7
At this time, the reaction force of the compression of the coil spring 13 acts on the threaded portion 32 of the six-bridge-shaped tool support 3, which moves to the left and the amount of movement is recorded by the dial gauge 2■.
Due to the elastic deformation of the support portion 33, the coil spring receiving portion 9 of @9
2 is moved in the opposite direction. Let KH be the stiffness constant of the cutting direction ir of the cutting tool 7 of the tool support 3 in the shape of a tool, KL be the spring constant of the coil spring 13, and the amount of compression of the 21-ir spring 13 that has been removed by using the dial gauge 21. If we set △L3, we get bite 7 from the Seki 1 system of force balance.
The amount of movement LB is as follows.

That is, if the values of K t, /K H are determined in advance by measurement, an arbitrary amount of movement can be used to send out the bi l-7 based on the scale of the dial gauge 21. KL,・K
If +, + are made to be 1/L OOO, that is, the rigidity of the support base 3 is made to be 1000 M of the spring 13, it becomes possible to perform minute feeding in units of 1/'1000 of the minimum scale of the dial gauge 21. (In other words, the cutting depth of the cutting tool can be determined simply by changing the scale of the dial gauge from mm to μm.) Fig. 2 shows an embodiment of the pond according to the present invention. By rotating, the tip 91.h of the shaft 9b moves in the direction of the center line of the shaft, the coil spring 13b expands and contracts, and the reaction force at the time of expansion and contraction acts on the cylinder 25, which is considered to be a spring with a high spring constant. As the cylinder 25 expands and contracts, the part 31b of the part 31b moves.Unlike the case shown in Fig. is sent in the cutting direction.

Effects of the invention: As described above, the micro-feeding device of the present invention moves the object to be positioned by applying the reaction force caused by the expansion and contraction of a spring with a low spring constant to a structure that is considered to be a spring with a high spring constant. Since it does not require a control device or drive device, it can be manufactured at low cost and can be easily used by on-site operators.

[Brief explanation of drawings]

Fig. 1 (a) shows the micro feeder of the present invention.
i fF? 1(D) is a sectional view taken along the line AA in FIG. 1(A), and FIG. 2 is a 11J↑ side view showing another embodiment of the present invention. 1... Base, 3... 4 bridges, 7 bite supports (springs with high spring constant: support means), 7.7
b...Bye 1~(positioning target), 9.9 b
−[1+, 13.13b...Coil spring, 17.
...Handle wheel, 2 points...Dial gauge (means for determining 1L of spring expansion and contraction), 25...Cylinder (supporting means).

Claims (3)

[Claims] (1) A positioning object that is to be moved forward or backward by a small distance in a certain direction, a base that is regarded as a reference body for the positioning object, and a base that is attached to the base and that is connected to the positioning object. A means for supporting the positioning object, which is regarded as a spring (A) with a high spring constant, a spring (B) with a low spring constant for applying a force in the direction to the support means, and a spring (B) with a low spring constant for applying a force in the direction to the support means. ); and means for measuring the amount of expansion and contraction of the spring (B); and a means for measuring the amount of expansion and contraction of the spring (B). (2) The micro-feeding device according to claim (1), wherein the object to be positioned is a cutting tool. (3) The micro-feeding device according to claim (1), characterized in that the ratio of the spring constant K_H of the spring (A) to the spring constant K_L of the spring (B) is K_H:K_L=1000:1.