A tool bar support mechanism and guide frame for machining tiny holes

Abstract

The present invention discloses a tool bar support mechanism and a guide frame for processing micro holes, comprising a drill sleeve seat, a tool is slidably connected inside the drill sleeve seat, a drill shank connecting sleeve is connected to the other end of the tool, a sleeve is slidably sleeved outside the drill shank connecting sleeve, and a plurality of tool guide mechanisms are arranged between the drill sleeve seat and the sleeve, and the plurality of guide mechanisms are evenly distributed around the tool. The mechanism adopts the basic principle of determining a plane by three points, and installs the drill rod support mechanism inside the guide frame body, thereby solving the problems of poor processing accuracy and low processing efficiency caused by the micro hole when the length-to-diameter ratio inside the guide frame exceeds 35 times the diameter, and achieving the function of anti-shake support for the tool bar.

Description

Technical Field

[0001] The invention relates to the field of mechanical processing equipment, in particular to a tool bar supporting mechanism and a guide frame for processing micro holes, which are key components of a micro hole deep hole drilling machine. Background Art

[0002] When the aspect ratio of the drilled hole is greater than 5 and the drilled hole diameter is less than φ35mm, a gun drill tool is usually used for deep hole processing. When drilling, the cutting oil enters the inner hole of the gun drill tool through the inner hole of the tool drive unit, and then reaches the cutting area. The cutting oil carries the chips through the processed hole wall and the V-groove of the tool and is discharged from the hole. After the gun drill head enters the workpiece, it uses its self-guiding function to complete deep hole drilling.

[0003] When using a gun drill to drill deep holes, there is a one-to-one correspondence between the specifications of the tool and the hole diameter to be processed. For example, a φ10 hole can only use a φ10 tool, and the tool specification is divided into intervals of 0.01mm. In addition, the tool specifications and auxiliary tool specifications are also one-to-one (auxiliary tools include: drill guide, drill rod support, drill shank connection). A set of tool rod supports is added for every 40 times the tool length. The longer the tool, the more tool rod supports are required. Only with sufficient support can the processing accuracy and efficiency be guaranteed.

[0004] Micro holes generally have a diameter of 1-3mm. The original machine tool processing depth is limited by the tool aspect ratio, and generally can only ensure that the processing depth is within 35 times the diameter, or reduce the accuracy and efficiency to achieve the purpose of gun drilling processing. Summary of the invention

[0005] In view of the above problems, the present invention discloses a tool rod support mechanism and a guide frame for processing tiny holes. The mechanism adopts the basic principle of determining a plane through three points, and installs the drill rod support mechanism inside the guide frame body, thereby solving the problems of poor processing accuracy and low processing efficiency caused by the aspect ratio of the tiny hole inside the guide frame exceeding 35 times the diameter, thereby achieving the effect of anti-shake support for the tool rod.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] A tool bar support mechanism for machining tiny holes comprises a drill sleeve seat, a tool is slidably connected inside the drill sleeve seat, a drill shank connecting sleeve is connected to the other end of the tool, a sleeve is slidably sleeved outside the drill shank connecting sleeve, and a plurality of tool guide mechanisms are arranged between the drill sleeve seat and the sleeve, and the plurality of guide mechanisms are evenly distributed around the tool.

[0008] Preferably, each tool guiding mechanism comprises a guide rod, the left end of the guide rod is connected to the drill sleeve seat, the right end of the guide rod is connected to the mounting seat, the guide rod is externally sleeved with an elastic sleeve, and a plurality of elastic sleeves are commonly connected to the tool.

[0009] Preferably, a plurality of elastic sleeves are commonly connected to a vibration-proof support plate, the center of the vibration-proof support plate is connected to the tool, and a guide hole cooperating with the guide rod is provided in an area outside the center of the vibration-proof support plate.

[0010] Preferably, an anti-vibration sleeve is provided between the tool and the anti-vibration support plate.

[0011] Preferably, the guide rod is connected with a retaining ring for positioning the anti-vibration support plate.

[0012] Preferably, there are a plurality of anti-vibration support plates, which are distributed along the axis of the tool, and an elastic sleeve is sleeved on the outside of the guide rod between every two adjacent anti-vibration support plates.

[0013] The present invention further discloses a guide frame for machining micro holes, comprising a frame body, and the frame body is equipped with the tool rod supporting mechanism as described above.

[0014] Preferably, the frame is a hollow box, the front side wall of the box is connected to the drill sleeve seat, and the rear side wall of the box is connected to the sleeve.

[0015] Beneficial Effects of the Invention

[0016] 1. This patent adopts a new structure in which the tool rod support mechanism is installed inside the guide frame body, which solves the problem of insufficient support due to the small diameter of the tool and the large aspect ratio in the guide frame.

[0017] 2. This patent adopts a three-rod guide structure, which is installed between the guide sleeve support and the sleeve, simplifying the inherent installation structure of the general drill rod support and making it possible to install the drill rod support inside the guide frame.

[0018] 3. This patent uses spring compression deformation to push the anti-vibration support plate to automatically reset when the tool retreats. The wire retaining ring plays the role of limiting the reset position, so that the drill rod support can automatically reset after processing is completed, which is convenient for batch processing.

[0019] 4. This patent adopts thermoplastic elastomer high-hardness polyurethane material as the drill rod anti-vibration sleeve, so that the support sleeve can support and prevent the tool from shaking, and reduce friction loss and temperature rise. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 The structure of the present invention Figure 1 ;

[0022] Figure 2 The structure of the present invention Figure 2 ;

[0023] Figure 3 The structure of the present invention Figure 3 ;

[0024] In the figure, 1. drill sleeve seat, 2. spring, 3. anti-vibration sleeve, 4. anti-vibration support plate, 5. guide rod, 6. sleeve, 7. drill shank connecting sleeve, 8. tool, 9. wire retaining ring, 10. guide frame. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] In the description of the present invention, it is necessary to understand that the terms "inside", "outside", "left" and "right" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] The present invention discloses a Figure 1-2 The knife bar support mechanism shown in Figure 3 The guide frame shown in the figure, the tool bar support mechanism includes a drill sleeve seat 1, a guide rod 5, a sleeve 6 and a mounting seat 10 connected in sequence from front to back, and a drill shank connecting sleeve 7 is sleeved in the mounting seat 10 and can slide forward and backward along the axis of the mounting seat. The front end of the drill shank connecting sleeve 7 is connected to a tool 8, and the tool 8 is slidably installed in the drill sleeve seat 1 and can slide forward and backward along the axis of the drill sleeve seat. There are three guide rods 5, which are evenly distributed around the tool 8. The end of the spring on the outside of each guide rod is sleeved with an anti-vibration sleeve 3. The three anti-vibration sleeves are all connected to the anti-vibration support plate 4. The number of anti-vibration support plates is determined according to the actual length-to-diameter ratio multiple of the tool 8 in the guide frame. At present, at most two groups are used, and the two groups are separated by an elastic sleeve, which is preferably a spring 2. On the outside of the anti-vibration support plate, a retaining ring is installed on each guide rod, and the retaining ring is preferably a steel wire retaining ring 9, which is a steel wire retaining ring for the shaft, to limit the position of the anti-vibration support plate 4 on the guide rod.

[0028] The tool bar support mechanism adopts the basic principle of three points to determine a plane, and uses three guide rods to position and guide the anti-shake plane. This simplifies the original drill rod support structure and makes it possible to install it inside the guide frame.

[0029] When installing the mechanism, the drill sleeve seat 1, spring 2, anti-vibration sleeve 3, anti-vibration support plate 4, guide rod 5, sleeve 6, and wire retaining ring 9 are assembled into a whole. One end of the three guide rods 5 is installed on the drill sleeve seat 1, and the other end is installed on the sleeve 6. The anti-vibration sleeve 3 that can be replaced according to the processing hole diameter is installed on the anti-vibration support plate 4, and they can move together on the three guide rods 5 along the guide rod axial direction. The spring 2 and the wire retaining ring 9 are used to limit the position of the anti-vibration support plate 4 on the guide rod.

[0030] When actually used for processing, the whole device is first installed inside the guide frame. Then, when the drill shank connecting sleeve 7 moves forward to a certain distance driven by the power part, the front end of the handle of the tool 8 can push the anti-vibration support plate 4 forward, and the spring 2 is gradually compressed. When the processing is completed, the tool 8 retreats under the drive of the drill shank connecting sleeve 7, and the spring 2 is expanded under the action of the restoring force, so that the anti-vibration support plate returns to the initial position defined by the wire retaining ring 9.

[0031] At the same time, the limit spring and drill handle connecting sleeve structure are used to realize the anti-vibration support plate on the three guide rods, which can perform motorized reciprocating motion along with the tool feeding and processing, so as to achieve the purpose of automatic continuous processing.

[0032] The anti-vibration support contact part with the tool bar is made of thermoplastic elastomer high-hardness polyurethane material to reduce wear and heat caused by high-speed rotation.

[0033] The anti-vibration support plate adopts a split structure, and the middle anti-vibration contact part can be replaced according to the change of the hole diameter.

[0034] The number of anti-vibration support plates can be selected according to the actual aspect ratio of the processing tool. Generally, the smaller the hole, the more number is used, and support is required for 35 times the diameter.

[0035] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tool bar support mechanism for machining micro holes, characterized in that: It comprises a drill sleeve seat, a tool is slidably connected inside the drill sleeve seat, a drill shank connecting sleeve is connected to the other end of the tool, a sleeve is slidably sleeved outside the drill shank connecting sleeve, and three tool guide mechanisms are arranged between the drill sleeve seat and the sleeve, and the three tool guide mechanisms are evenly distributed around the tool; Each tool guide mechanism comprises a guide rod, the left end of the guide rod is connected to the drill sleeve seat, the right end of the guide rod is connected to the sleeve, an elastic sleeve is sleeved on the outside of the guide rod, and the three elastic sleeves are connected to the tool together; The three elastic sleeves are commonly connected to an anti-vibration support plate, the center of the anti-vibration support plate is connected to the tool, and the area outside the center of the anti-vibration support plate is provided with a guide hole that cooperates with the guide rod; An anti-vibration sleeve is provided between the tool and the anti-vibration support plate; There are multiple anti-vibration support plates, which are distributed along the axis of the tool, and an elastic sleeve is sleeved on the outside of the guide rod between every two adjacent anti-vibration support plates.

2. A tool bar support mechanism for machining micro holes according to claim 1, characterized in that: The guide rod is connected with a retaining ring for positioning the anti-vibration support plate.

3. A guide frame for machining micro holes, characterized in that: It comprises a frame body, on which the knife bar supporting mechanism as claimed in claim 1 or 2 is installed.

4. A guide frame for machining micro holes according to claim 3, characterized in that: The frame is a hollow box, the front side wall of the box is connected to the drill sleeve seat, and the rear side wall of the box is connected to the sleeve.

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