JP2000141114A - Machining device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform excellent machining by suppressing the downward displacement amount of a guide member to guide a tool prior to processing. SOLUTION: In this machining device, a moving part 30 is structured movably back and forth to a machining device body 20 holding tools 21, 22, guide bushes 31, 32 for guiding the tools are provided in this moving part 30, and a longitudinal guide rail 26 is provided on the processing device body 20 side. Sliders 36A, 36B slidably guided by the guide rail 26 are provided on the moving body 30 side, in order to fix the overhang quantity of the guide bushes 31, 32. A coil spring 38 is also provided between moving body part in the rear of a left right linking member 33 located at the forefront of the moving part and the processing device body 20, in order to energize the moving body 30 forward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing apparatus for performing a processing operation while holding various tools.

[0002]

2. Description of the Related Art Some conventional processing apparatuses are provided with guide means for supporting a tool and guiding it to a processing position (for example, Japanese Patent Publication No. Hei 8-25081). As an example, a drilling device is shown in FIGS.

In FIG. 6, a table 2 is mounted on a fixed bed 1, and the table 2 is driven to be fed back and forth (left and right directions in the figure) by a motor and a feeding mechanism (not shown).

[0004] The table 2 has a processing head 3
And a plurality of (two in the figure) guide cylinders 4.

[0005] As shown in FIGS.
Holds the drill bit 3a at its front end,
A motor for rotating the drill bit 3a is provided above the rear part (upper left in FIG. 6). A pilot bar 5 is inserted through each guide tube 4 in the front-rear direction, and is relatively movable in the same direction.

Reference numeral 6 denotes an auxiliary guide tube fixed to the front end of the guide tube 4.

A positioning pin 7 with a flange is fixed to the tip of each pilot bar 5, and a jig plate 8 is fixed to the positioning pin 7 so as to connect the positioning pins 7. The jig plate 8 is provided with a bush (guide member) 9 through which the drill bit 3a is inserted in the axial direction.
a is guided to the processing position along the axial direction.

The positioning pin 7 penetrates the jig plate 8 and has an end protruding forward. And
When the projecting end of the positioning pin 7 is fitted into the bush 12 of the receiving member 11 provided on the work support table 10, the jig plate 8 and the guide bush 9 are positioned at regular positions. I have.

A coil spring 13 is interposed between the auxiliary guide cylinder 6 and the flange of the positioning pin 7 in a compressed state. The resilient force of the coil spring 13 causes the pilot bar 5, the positioning pin 7, The moving body including the component plate 8 and the guide bush 9 is urged forward (to the right in FIGS. 6 to 8).

A groove 15 extending in the axial direction is formed at an appropriate position of the pilot bar 5, and a pin 17 on the table 2 side is fitted into the groove 15 so that the guide cylinder 4 is formed.
The amount of forward movement of the pilot bar 5 with respect to
The insertion state of the drill bit 3a into the guide bush 9 is maintained.

The processing procedure by this processing apparatus is as follows.

The processing head 3 and the guide cylinder 4 are advanced together with the table 2. Then, when the front end of the positioning pin 7 is fitted into the bush 12 on the work support base 10, the advance is temporarily stopped (FIG. 7). By this fitting, the relative positions of the positioning pin 7, the jig plate 8, and the guide bush 9 with respect to the work W, and thus the position of the drill bit 3a, are accurately determined, and the bending of the pilot bar 5 due to its own weight of the jig plate 8 and the like is performed. This prevents the position of the drill bit 3a from shifting downward.

The motor of the processing head 3 is operated to rotate the drill bit 3a. In this state, the advance of the table 2 is restarted. At this time, since the positioning pin 7 has already been fitted to the bush 12 and the pilot bar 5 and the jig plate 8 cannot advance any further, the coil spring 13
Only the processing head 3 and the guide cylinder 4 move forward with the compression deformation of, and the drill bit 3a accurately reaches the processing position of the workpiece W while being guided and held by the guide bush 9.

[0014]

The above apparatus has a structure in which the pilot bar 5 of the moving body is inserted into the guide cylinder 4 of the processing apparatus main body and the pilot bar 5 projects from the guide cylinder 4. As shown in FIG.
8, the overhang amount L1 before moving forward relative to the pilot bar 5 is always larger than the overhang amount L2 after the guide cylinder 4 moves forward by the stroke S, as shown in FIG. Become. In other words, the overhang amount L1 before the advance of the machining apparatus is obtained by adding the stroke S to the overhang amount L2 in the machining completed state. In particular, when the stroke S is large, the overhang amount L1 before machining should be reduced. Will be very difficult. If the overhang amount L1 cannot be reduced, the amount of deflection of the pilot bar 5 (that is, the amount of downward displacement of the positioning pin 7) in the pre-machining stage increases, resulting in the following inconvenience.

A) Before the positioning pin 7 reaches the bush 12, the jig plate 8 and the guide bush 9 are displaced below the regular guide position by the deflection of the pilot bar 5, and the guide bush 9 Since the upper inner peripheral surface is pressed against the upper inner peripheral surface of the drill bit 3a, turning the drill bit 3a at this stage causes significant wear of the drill bit 3a and the guide bush 9. Therefore, in this device, the drill bit 3a cannot be rotated until the positioning pin 7 reaches the bush 12, and the cycle time is correspondingly increased.

B) Before the positioning pin 7 reaches the bush 12, the positioning pin 7 is located at a position below the bush 12, and the positioning pin 7 is forcibly pressed against the bush 12 to push the bush 12. The positioning pin 7 and the bush 12 are significantly worn. Therefore, in order to maintain high processing accuracy, the positioning pin 7 and the bush 12 must be replaced at short intervals.

In view of such circumstances, an object of the present invention is to provide a processing apparatus capable of performing good processing by suppressing the downward displacement amount of a guide member before processing.

[0018]

SUMMARY OF THE INVENTION As means for solving the above-mentioned problems, the present invention provides a machining apparatus main body for performing a machining operation while holding a tool, and an axial direction of the tool with respect to the machining apparatus body. A moving body that is connected to be relatively movable in a front-rear direction that is a parallel direction, and a biasing unit that urges the moving body forward with respect to the processing apparatus main body; In a processing device provided with a guide member that guides the tool to a processing position in a state where the tool is inserted in the axial direction, a slide guide member that extends in a direction parallel to the axial direction of the tool is provided on the processing device main body side, At least one slider that slides along the slide guide member while being fitted to the slide guide member is provided on the moving body side.

In this apparatus, a slide guide member extending in the front-rear direction is provided on the processing apparatus main body side and a slider guided by the slide guide member is provided on the moving body side. Is always constant regardless of the position of the moving object. Therefore, FIG.
In the case where the stroke S (the amount of relative movement of the processing apparatus main body with respect to the moving body) is large, the amount of overhang before processing can be sufficiently reduced. As a result, the downward displacement of the guide member caused by the deflection of the pilot bar as in the related art can be effectively suppressed, and the guide member can always be maintained at a substantially regular height position.

The specific numbers of the sliders and the slide guide members are not particularly limited, but the slide guide members are provided on both left and right sides of the processing apparatus main body, and the right and left sliders fitted to each slide guide member are connected to each other. The left and right connecting members are provided with the guide member, the moving body is provided with a slider connecting member extending in the front-rear direction, and a plurality of sliders are arranged side by side on the slider connecting member. By fitting to the slide guide member, the moving body can be supported and guided more stably than when a single slider is used.

In this apparatus, the specific structure and location of the urging means can be freely set. However, as in the conventional apparatus shown in FIG. If the coil spring 13 is interposed between the cylinder 6 and the positioning pin 7, the overhang amount increases by the axial length of the coil spring 13. On the other hand, if the spring member as the urging means is interposed between the moving body and the portion behind the foremost end of the processing apparatus main body, the amount of overhang can be sufficiently reduced. Specifically, there is a device in which the rear end of the processing apparatus main body is positioned behind the rear end of the slider connecting member, and a spring member is interposed between these rear ends in a compressed state. Is preferred.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One preferred embodiment of the present invention will be described below with reference to FIGS.

The illustrated processing apparatus includes a processing apparatus main body 20 and
And a moving body 30. The processing apparatus main body 20 is placed on a table similar to the table 2 shown in FIG. 6, and is transported as a whole in a front-rear direction (a direction in which the processing apparatus approaches and separates from the work).

The processing apparatus main body 20 includes a main body frame 23 extending in the left-right direction (vertical direction in FIGS. 1 and 3).
At the front part thereof, two tools 21 and 22 extending in the front-rear direction are held, and a motor 24 for rotating these tools 21 and 22 is provided. In addition, the present invention can be widely applied to a processing apparatus using various tools such as a drill, an end mill, and a reamer irrespective of the specific number and type of tools.

A rail support member 25 extending in the front-rear direction is fixed to both left and right sides of the main body frame 23. A guide rail (slide guide member) 26 also extending in the front-rear direction is laid on the rail support member 25. I have. At the rear end of each rail support member 25, a spring seat plate 27 whose rear end protrudes upward is provided.

The moving body 30 integrally includes a left and right connecting member 33 extending in the left and right direction and a slider connecting shaft 35 extending rearward from both ends of the left and right connecting member 33.

A guide bush (guide member) 3 is provided substantially in the middle of the left and right connecting member 33 so as to penetrate the front and rear.
1, 32 are fixed. These guide bushes 3
1 and 32, the tool 2 of the processing device main body 20 is provided inside thereof.
1 and 22 are disposed at positions where they are inserted in the axial direction (front-back direction), respectively.

A front slider 36A and a rear slider 36B are fixed to a front end portion and a rear portion of each slider connecting shaft 35, respectively.
36B are slidably fitted to the left and right guide rails 26, respectively. Then, the sliders 36A, 36B
Slides along the guide rail 26,
The entire movable body 30 can be relatively moved in the front-rear direction with respect to the processing apparatus main body 20. Here, the front slider 36A and the left and right connecting member 33 are rigidly and closely connected to each other, and the distance L between them (FIGS. 2 and 4) is very small.

At the rear end of each slider connecting shaft 35, a spring receiving hole 37 that opens rearward is provided. And
The coil spring 38 is accommodated in the spring accommodation hole 37, and the coil spring 38 is interposed between the bottom surface of the spring accommodation hole 37 and the spring seat plate 27 in a compressed deformation state. The entire moving body 30 is urged forward (to the right in FIGS. 1 to 4) with respect to the processing apparatus main body 20 by the force.

A stopper 28 is provided at an intermediate portion in the front-rear direction of the left rail support member 25. When the rear slider 36B comes into contact with the stopper 28, the movement of the moving body 30 forward from the position is restricted. Have been. The restriction position is set at a position where the insertion state of the tools 21 and 22 into the guide bushes 31 and 32 is maintained as shown in FIGS.

Next, the operation of the processing apparatus will be described.

1) In the initial state before machining, the entire machining apparatus is sufficiently retracted from the work, and the movable body 30 is moved to the foremost end position shown in FIGS. The rear slider 36B is held at a position where the rear slider 36B comes into contact with the rear side. Here, the distance (that is, the amount of overhang) L from the slider 36 </ b> A to the left and right connecting member 33 is invariable, and is extremely high even though the moving body 30 is pushed forward with respect to the processing apparatus main body 20. small. Therefore, the right and left connecting members 33 and the like hardly bend due to their own weight, and the left and right connecting members 33 and the guide bushes 31 and 32 are maintained at substantially regular height positions.

2) The motor 24 is operated, and each of the tools 21,
22 is driven to rotate. As described above, the guide bush 3
Since 1, 32 are held at almost regular height positions,
Even if the rotation of the tools 21 and 22 is started at this stage, there is no possibility that the tools 21 and 22 and the guide bushes 31 and 32 are significantly worn.

3) The table (not shown) is operated, and the processing apparatus main body 20 is advanced. At first, the moving body 30 also moves forward integrally with the processing apparatus main body 20, but the stopper 40 (FIG. 3) provided on the work support base side connects the left and right connecting members 3 to each other.
The moving body 30 is prevented from advancing from the time when the front surface of the moving member 3 abuts, and only the processing apparatus main body 20 moves forward with the compression deformation of the coil spring 38. As a result, the tools 21 and 22 move forward inside the guide bushes 31 and 32 while being guided by the guide bushes 31 and 32, and reach the proper machining positions (FIGS. 3 and 4).

As described above, in this processing apparatus, the guide rail 26 extending back and forth is provided on the processing apparatus main body 20 side, and the sliders 36A and 36B slidably guided by the guide rail 26 are provided on the moving body 30 side. Therefore, regardless of the relative movement stroke of the moving body 30 with respect to the processing apparatus main body 20, the overhang amount L in the state before processing (FIGS. 1 and 2) is obtained when the processing is completed (FIGS. 3 and 4). Can be made equal to the overhang amount L in the above. Therefore, the overhang amount L can be significantly reduced (in some cases, it can be set to 0), and as a result,
The guide bushes 31 and 32 can be maintained at substantially regular height positions while omitting the positioning means including the positioning pins 7 and the bushes 12 as shown in FIGS. 7 and 8, and the structure can be simplified. At the same time, it is possible to reduce the cycle time by rotating the tools 21 and 22 from the start of the machining operation.

A structure in which a coil spring 13 is interposed between the front end (the auxiliary guide cylinder 6 in the figure) of the processing apparatus main body and the positioning pin 7 as in the conventional apparatus shown in FIGS. In this case, the overhang amount is inevitably increased by the axial length of the coil spring 13. However, as shown in FIGS. 1 to 4, the spring seat plate 27, which is a portion behind the foremost end of the processing apparatus main body, and the moving body If the coil spring 38 is interposed between the coil spring 30 and the coil spring 30, the overhang amount L can be greatly reduced.

The present invention is not limited to the above embodiment,
For example, the following embodiment is also possible.

In the above embodiment, the guide rails 26 as slide guide members are provided on both the left and right sides of the main body frame 23. However, if layout is possible, for example, only one center of the main body frame 23 is provided. A slide guide member may be provided.

In the above-described embodiment, the sliders 36A and 36B are arranged at the front and rear two places. However, the sliders may be provided at only one place in the front-rear direction, or three or more sliders may be provided. However, providing a plurality of sliders in the front-rear direction enables more stable guide support.

The location of the spring member such as the coil spring 38 can be set as appropriate. For example, in the structure shown in FIGS. 1 to 5, even if a tension coil spring is interposed between the rear slider 36B and the stopper 28, the overhang amount can be effectively reduced.

[0041]

As described above, according to the present invention, a slide guide member extending in a direction parallel to the axial direction of the tool is provided on the processing apparatus main body side, and the slide guide member is fitted on the moving body side. Since at least one slider that slides along the slide guide member in the state is provided, the amount of overhang before machining of the guide member in the moving body is reduced, and the downward displacement is effectively suppressed, so This has the effect of realizing a simple processing.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state in which a moving body is moving forward with respect to a processing apparatus main body in a processing apparatus according to an embodiment of the present invention.

FIG. 2 is a side view showing the state of FIG.

FIG. 3 is a plan view showing a state in which the moving body is retracted with respect to the processing apparatus main body in the processing apparatus according to the embodiment of the present invention;

FIG. 4 is a side view showing the state of FIG. 3;

FIG. 5 is a front view of the processing apparatus according to the embodiment of the present invention.

FIG. 6 is an overall side view of a conventional processing apparatus.

7 is a cross-sectional side view showing a state immediately after a positioning pin has reached a bush in the processing apparatus shown in FIG. 6;

8 is a cross-sectional side view showing a state where the processing head has further advanced from the state shown in FIG. 7;

[Explanation of symbols]

 Reference Signs List 20 processing apparatus main body 23 main body frame 26 guide rail (slide guide member) 27 spring seat plate 30 moving body 31, 32 guide bush (guide member) 33 left and right connecting member 35 slider connecting shaft 36A, 36B slider 38 coil spring (spring member)

Claims (5)

[Claims] 1. A processing apparatus main body that performs a processing operation while holding a tool, and a moving body that is connected to the processing apparatus main body so as to be relatively movable in a front-rear direction that is a direction parallel to an axial direction of the tool. A biasing means for biasing the moving body forward with respect to the processing apparatus main body, and a guide member for guiding the tool to a processing position in a state where the tool is inserted in the moving body in the axial direction. In the processing device provided with, a slide guide member extending in a direction parallel to the axial direction of the tool is provided on the processing device main body side, and the slide is provided on the moving body side in a state fitted with the slide guide member. A processing apparatus comprising at least one slider that slides along a guide member. 2. The processing apparatus according to claim 1, wherein the slide guide members are provided on both left and right sides of the processing apparatus main body, and left and right sliders fitted to the slide guide members are connected by left and right connection members. A processing apparatus, wherein the guide member is provided on a left and right connecting member. 3. The processing apparatus according to claim 1, wherein a slider connecting member extending in the front-rear direction is provided on the movable body, and a plurality of sliders are arranged side by side on the slider connecting member. A processing device fitted to a guide member. 4. The processing apparatus according to claim 1, wherein a spring member serving as the urging means is interposed between a moving body and a portion of the main body of the processing apparatus, which is located rearward of a front end portion. A processing device characterized by having been made. 5. The processing apparatus according to claim 4, wherein a rear end of the processing apparatus main body is located behind a rear end of the slider connecting member, and a spring member is compressed between the rear ends. A processing device, characterized by interposing