Fine adjustment tool bar for metal cutting

Abstract

This utility model relates to a precision-adjusting tool holder for metal cutting, used in boring machines (drilling machines) to machine internal holes or internal threads. It allows for rapid and accurate determination of the depth of cut and quick retraction during the return stroke. It consists of an infeed mechanism and a pressure adjustment mechanism. The infeed mechanism comprises a tool holder, a tapered shank, a dial gauge, an infeed sleeve, a sliding tool holder, a spring, a locking screw, a pressure pin, a cutting tool, a clearance adjustment plate, and an anti-disengagement pin. The upper part of the tool holder is fitted with a tapered shank, which is threadedly connected to the tapered shank. The dial gauge and the infeed sleeve are tightly fitted together. The lower part of the tool holder contains a sliding tool holder and a clearance adjustment plate. The lower part of the infeed sleeve is threadedly fitted to the tool holder. When the dial gauge and the infeed guide tube rotate, they move up and down relative to the tool holder. The pressure adjustment mechanism consists of a pressure adjustment plate and an intermediate plate. The intermediate plate is mounted on the dial gauge and is threadedly connected to the tapered shank. Several grooves are milled on the upper outer surface of the pressure adjustment plate to facilitate the use of a wrench.

Description

Technical Field

[0001] This utility model relates to a precision-adjusting tool holder for metal cutting. When used on a boring machine (drilling machine) to machine internal holes or internal threads, it quickly and accurately determines the depth of cut and allows for rapid tool retraction during the return stroke. Background Technology

[0002] Existing boring bar holders consist of a tool mounted in a square hole at the head of the holder, which is then secured with a screw to perform boring. Determining the tool's position within the holder hole, i.e., adjusting the depth of cut, relies entirely on experience and visual observation, which is time-consuming and makes it difficult to guarantee dimensional accuracy. Furthermore, for machining internal threads, it is impossible to prevent the tool tip from contacting the workpiece surface during the return stroke. Utility Model Content

[0003] The purpose of this utility model is to provide a fine-tuning tool holder for metal cutting, which is a boring tool holder that can quickly and accurately determine the depth of cut and allows the cutting tool to be easily withdrawn during the return stroke so that it does not contact the workpiece surface, thereby reducing tool wear and avoiding damage to the machined surface.

[0004] This utility model of a fine-tuning tool holder for metal cutting is achieved by the following technical solution:

[0005] The fine-tuning tool holder for metal cutting consists of a tool feed mechanism and a pressure adjustment mechanism; the tool feed mechanism consists of a tool holder, a taper shank, a dial, a tool feed sleeve, a sliding tool box, a spring, a locking screw, a pressure pin, a cutting tool, a gap adjustment plate, and an anti-disengagement pin;

[0006] The upper part of the tool holder of the feed mechanism is equipped with a tapered shank, and the two are connected by threads. To prevent loosening, a locking screw is provided for fastening. The dial and the feed sleeve are tightly fitted together and are sleeved on the outside of the tool holder. There is a sliding tool box and a gap adjustment plate in the hole at the lower part of the tool holder. The lower part of the feed sleeve and the tool holder are threaded together. When the dial and the feed guide rotate, they will move up and down relative to the tool holder.

[0007] Because the bottom of the feed sleeve and the upper part of the sliding tool box are in conical contact, when the dial and the feed sleeve rotate and move downward, they will push the sliding tool box to move horizontally outward, and the cutting tool will move forward. When the dial reverses, the feed sleeve moves upward, the sliding tool box loses pressure and is pressed inward by the spring, and the cutting tool moves back.

[0008] The pressure regulating mechanism consists of a pressure regulating plate and an intermediate plate, which are mounted on the scale. The pressure regulating plate and the tapered handle are connected by threads. Several grooves are milled on the upper outer surface of the pressure regulating plate to facilitate rotation with a wrench. When the pressure regulating plate rotates and moves downward, it presses against the scale through the intermediate plate, causing it to stop. When the pressure regulating plate reverses, the pressure on the scale disappears, and it can rotate freely again.

[0009] The lower part of the feed sleeve is an inner conical surface, while the upper part of the sliding tool box that contacts it is an outer conical surface. The sum of the two conical angles is 90°, and the conical surface of the sliding tool box is only in its upper half, making it a local conical surface.

[0010] The upper part of the tool holder has a long groove, and the inner hole of the middle plate has a protrusion that protrudes into the long groove on the upper part of the tool holder, so that the middle plate can move up and down but cannot rotate; a vertical line or triangular line is engraved on the outer cylindrical surface of the middle plate relative to the zero point of the scale, so as to determine the amount of rotation of the scale.

[0011] The graduations on the dial correspond to the pitch of the thread on the lower part of the feed sleeve. Therefore, the reading on the rotating dial is the distance the sliding force box moves, which is the feed amount of the cutting tool.

[0012] The bottom hole of the tool holder has a trapezoidal cross-section and contains a sliding force box, which also has a trapezoidal cross-section. There is a boss on the tool holder hole at the top of the sliding tool box to install a spring. The spring presses against the top of the sliding force box. A gap adjustment plate is installed between the bottom of the sliding tool box and the bottom of the tool holder hole. The gap adjustment plate ensures that the sliding tool box slides smoothly. The two ends of the gap adjustment plate are bent and wrapped around the bottom of the tool holder to prevent it from falling off.

[0013] This utility model relates to a precision-adjusting tool holder for metal cutting, which features a reasonable and compact design. It includes a feed mechanism and a pressure adjustment mechanism. The tool holder is inserted into the spindle hole of a boring machine (drilling machine). Rotating the upper anti-disengagement pin causes its conical head to engage with the bottom of the elliptical hole for removing the drill bit in the conical bore of the boring machine (drilling machine) spindle. Rotating the dial and feed sleeve moves them downwards. Because the upper part of the sliding tool holder and the lower part of the feed sleeve are both conical, the outward movement of the sliding tool holder inevitably moves the internal cutting tool. Since the feed sleeve and tool holder are threaded together with a fixed pitch, and the dial is evenly divided, the rotation of the dial accurately reflects the distance the cutting tool travels. Once the cutting tool position is determined, the pressure adjustment plate is unscrewed to lock the dial in place, allowing the boring machine (drilling machine) to begin boring. During the return stroke, reversing the pressure adjustment plate and dial retracts the tool. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of a fine-tuning tool holder used in metal cutting.

[0016] Figure 2 This is a sectional view of the structure of a fine-tuning tool holder used in metal cutting.

[0017] Figure 3 This is a schematic diagram of the operation of a fine-tuning tool holder used in metal cutting.

[0018] Figure 4This is a schematic diagram of a fine-tuning tool holder used in metal cutting.

[0019] In the diagram: 1. Taper shank, 2. Pressure adjusting plate, 3. Intermediate plate, 4. Dial, 5. Feed sleeve, 6. Tool holder, 7. Sliding tool box, 8. Spring, 9. Lathe tool, 10. Tool pressing screw, 11. Set screw, 12. Gap adjusting plate, 13. Boring machine (drilling machine), 14. Workpiece, 15. Anti-disengagement pin. Detailed Implementation

[0020] See attached document Figure 1-4 The fine-tuning tool holder used in metal cutting consists of a feed mechanism and a pressure adjustment mechanism.

[0021] The feed mechanism consists of a dial 4, a feed sleeve 5, a sliding tool box 7, a tool holder conical surface, a dial 4, a spring 8, a locking screw 11, a tool pressing screw 10, a gap adjusting plate 12, and a cutting tool 9.

[0022] The dial 4 and the feed sleeve 5 are tightly fitted together as one unit.

[0023] The dial 4 and the feed sleeve 5 are fitted over the tool holder 6. The lower part of the feed sleeve 5 and the tool holder 6 are threaded together. When the dial 4 and the feed sleeve 5 rotate, they will move relative to the tool holder 6. Because the bottom of the feed sleeve 5 and the upper part of the sliding tool box 7 are in conical contact, when the dial 4 and the feed sleeve 5 rotate and move downward, they will push the sliding tool box 7 to move horizontally outward, and the cutting tool 9 will move forward. When the dial 4 reverses, the feed sleeve 5 moves upward, the sliding tool box 7 loses pressure and is pressed inward by the spring 8, and the cutting tool 9 moves back.

[0024] The pressure regulating mechanism consists of a pressure regulating plate 2 and an intermediate plate 3, which are mounted on a scale plate 4.

[0025] The pressure regulating plate 2 and the cone handle 1 are connected by threads. Several grooves are milled on the cylindrical surface of the pressure regulating plate to allow the wrench to apply force. When the pressure regulating plate 2 rotates and moves downward, it presses against the scale plate 4 through the intermediate plate 3, causing it to stop.

[0026] When the pressure regulating plate 2 reverses, the pressure on the scale 4 disappears, and it can rotate freely again.

[0027] The lower part of the feed sleeve 5 is an inner conical surface, while the upper part of the sliding tool box 7 that contacts it is an outer conical surface. The sum of the two conical angles is 90°, and the conical surface of the sliding tool box 7 is only in its upper half, making it a local conical surface.

[0028] The upper part of the tool holder 6 has a long groove, and the inner hole of the middle disk 3 has a protrusion that protrudes into the long groove on the upper part of the tool holder 6, so that the middle disk 3 can move up and down but cannot rotate. A vertical line or isosceles triangle is engraved on the outer cylindrical surface of the middle disk 3 relative to the zero point of the scale 4 in order to determine the amount of rotation of the scale 4.

[0029] The scale on the dial 4 corresponds to the pitch of the thread on the lower part of the feed sleeve 5. That is, the reading on the rotating scale is the distance the sliding tool box 7 moves, which is the feed amount of the cutting tool 9.

[0030] The bottom hole of the tool holder 6 has a trapezoidal cross section, and the sliding tool box 7 inside also has a trapezoidal cross section. There is a boss in the tool holder hole at the top of the sliding tool box 7 to install a spring. The spring 8 presses against the top of the sliding tool box 7. A gap adjustment piece is installed between the bottom of the sliding tool box 7 and the bottom of the tool holder hole to ensure that the sliding tool box 7 slides smoothly.

[0031] See attached document Figure 3 A schematic diagram of the operation of a fine-tuning tool holder used in metal cutting.

[0032] Insert the fine-tuning tool holder 12 into the spindle hole of the boring machine (drilling machine) 13, tighten the anti-disengagement pin 15, rotate the dial 4 and the feed sleeve 5 downwards, the sliding tool box 7 moves outwards under force, and the internal cutting tool 9 will inevitably move along with it. Observe the scale on the dial to show the amount of cutting tool movement, that is, the depth of cut. After determining the depth of cut, unscrew the pressure adjusting plate 2 to press the intermediate plate 3 and the dial 4 firmly. Start the boring machine (drilling machine) 13 to feed downwards and bore the hole of the workpiece 14. When boring to the bottom of the workpiece 14, when it is time to return, in order not to damage the inner hole, the tool needs to be retracted to allow the cutting tool tip to disengage. At this time, rotate the pressure adjusting plate 2 to release the pressure on the scale 4, rotate the dial 4 in reverse, the sliding tool box 7 moves back under the action of the spring, the cutting tool 9 disengages from the workpiece surface, and the fine-tuning tool holder 12 is lifted back to the top of the workpiece 14, repeating the previous operation to bore the hole again.

[0033] The present invention will now be described in detail with reference to the accompanying drawings:

[0034] like Figure 1-4 As shown, this utility model relates to a precision-adjusting tool holder for metal cutting. The precision-adjusting tool holder for metal cutting consists of a feed mechanism and a pressure adjustment mechanism. The feed mechanism comprises a taper shank 1, a dial 4, a feed sleeve 5, a tool holder 6, a sliding tool box 7, a spring 8, a cutting tool 9, a tool-pressing pin 10, a locking screw 11, a gap adjustment plate 12, and an anti-disengagement pin 15. The dial 4 and the feed sleeve 5 are tightly fitted together. The dial 4 and the feed sleeve 5 are fitted over the tool holder 6, and the feed sleeve 5 and the tool holder 6 are threaded together. When the dial 4 and the feed sleeve 5 rotate, they move relative to the tool holder 6. Because the bottom of the feed sleeve 5 and the upper part of the sliding tool box 7 are in conical contact, when the dial 4 and the feed sleeve 5 rotate and move downwards, they push the sliding tool box 7 horizontally outwards, causing the cutting tool to move forward. When the dial 4 reverses direction, the feed sleeve moves upwards, the sliding tool box loses pressure, and is pressed inwards by the spring, causing the cutting tool to rotate.

[0035] The pressure regulating mechanism consists of a pressure regulating plate 2 and an intermediate plate 3, which are mounted on the scale 4. The pressure regulating plate 2 and the tapered handle 1 are connected by threads. Several grooves are milled on the cylindrical surface of the pressure regulating plate 2 to allow for force to be applied with a wrench. When the pressure regulating plate 2 rotates and moves downward, it presses against the scale 4 through the intermediate plate 3 to stop it from moving. When the pressure regulating plate 2 reverses, the pressure on the scale disappears and it can rotate freely again.

[0036] The lower part of the feed sleeve 5 is an inner conical surface, while the upper part of the sliding force box 7 that is in contact with it is an outer conical surface. The sum of the two conical angles is 90°, and the conical surface of the sliding tool box 7 is only in its upper half, making it a local conical surface.

[0037] The upper part of the tool holder 6 has a long groove, and the inner hole of the middle disk 3 has a protrusion that protrudes into the long groove on the upper part of the tool holder 6, so that the middle disk 3 can move up and down but cannot rotate. A vertical line or isosceles triangle is engraved on the outer cylindrical surface of the middle disk 3 relative to the zero point of the scale 4 in order to determine the amount of rotation of the scale 4.

[0038] The scale on dial 4 corresponds to the pitch of the thread on the lower part of the feed sleeve 5. That is, the reading on the rotating scale on dial 4 is the distance the sliding tool box 7 moves, which is the feed amount of the cutting tool 9.

[0039] The bottom hole of the tool holder 6 has a trapezoidal cross section, and the sliding force box 7 inside also has a trapezoidal cross section. There is a boss in the hole of the tool holder 6 at the top of the sliding tool box 7 to install a spring 8. The spring 8 presses against the top of the sliding tool box 7. A gap adjustment piece is installed between the bottom of the sliding tool 7 and the bottom of the hole of the tool holder 6 to ensure that the sliding tool box 7 slides smoothly.

[0040] like Figure 3As shown, insert the fine-tuning tool holder into the spindle hole of the boring machine (drilling machine) and tighten the anti-disengagement pin to install it, so that boring can be performed on the workpiece. Begin boring. Before boring, process the hole diameter as required in the drawing. Because the feed sleeve 5 and the tool holder 6 are threaded, the feed sleeve 5 rotates downwards. The bottom of the feed sleeve 5 is an inner conical surface, and the upper half of the sliding tool box 7 is an outer conical surface. When the two contact, the sliding tool box 7 is pushed outwards by the feed sleeve 5, and the cutting tool 9 also moves outwards. Because the pitch of the feed sleeve 5 and the tool holder 6 is constant, the number of divisions on the dial 4 indicates the distance the sliding tool box moves. Therefore, the depth of cut and feed rate are determined by the dial 4. After determining the position of the cutting tool 9, rotate the pressure adjusting plate 2. The pressure adjusting plate 2 moves downwards past the intermediate plate 3, pressing the dial 4 to prevent further displacement. Because there is a protrusion inside the hole of the intermediate disk 3, which enters the groove of the tool holder 1 and prevents it from rotating, when the pressure adjusting disk 2 rotates downward, the intermediate disk 3 is pressed down, causing the scale disk 4 to be pressed tightly and not rotate. The position of the scale disk 4 will not change. When the boring machine (drilling machine) spindle rotates to bore the hole, when it reaches the bottom and returns, the spindle stops rotating, the pressure adjusting disk 2 is reversed to release the pressure on the scale disk, and then the scale disk 4 and the feed sleeve 5 are reversed to move upward. Because the sliding tool box 7 is pushed inward by the spring 8, the cutting tool 9 is no longer in contact with the workpiece surface, and the boring machine (drilling machine) spindle moves upward. The fine-tuning tool holder 12 rises to the upper surface of the workpiece 14, and the depth of cut of the cutting tool 9 is adjusted according to the above procedure to bore the hole again.

Claims

1. A fine-tuning tool holder for metal cutting, characterized in that, It consists of a tool feed mechanism and a pressure adjustment mechanism; the tool feed mechanism consists of a tool holder, a taper shank, a dial, a tool feed sleeve, a sliding tool box, a spring, a locking screw, a tool pressing pin, a cutting tool, a gap adjusting plate, and an anti-disengagement pin; The upper part of the tool holder of the feed mechanism is equipped with a tapered shank, and the two are connected by threads. To prevent loosening, a locking screw is provided for fastening. The dial and the feed sleeve are tightly fitted together and are sleeved on the outside of the tool holder. There is a sliding tool box and a gap adjustment plate in the hole at the lower part of the tool holder. The lower part of the feed sleeve and the tool holder are threaded together. When the dial and the feed guide rotate, they will move up and down relative to the tool holder. The bottom of the feed sleeve and the upper part of the sliding tool box are in conical contact. When the dial and the feed sleeve rotate and move downward, they will push the sliding tool box to move horizontally outward, and the cutting tool will move forward. When the dial reverses, the feed sleeve moves upward, the sliding tool box loses pressure and is pressed inward by the spring, and the cutting tool moves back. The pressure regulating mechanism consists of a pressure regulating plate and an intermediate plate, which are mounted on the scale. The pressure regulating plate and the tapered handle are connected by threads. Several grooves are milled on the upper outer surface of the pressure regulating plate to facilitate the use of a wrench. When the pressure regulating plate rotates and moves downward, it presses against the scale through the intermediate plate, causing it to stop. When the pressure regulating plate reverses, the pressure on the scale disappears, and it can rotate freely again.

2. The precision-adjusting tool holder for metal cutting according to claim 1, characterized in that, The lower part of the feed sleeve is an inner conical surface, while the upper part of the sliding tool box that contacts it is an outer conical surface. The sum of the two conical angles is 90°, and the conical surface of the sliding tool box is only in its upper half, making it a local conical surface.

3. The precision-adjusting tool holder for metal cutting according to claim 1, characterized in that, The upper part of the tool holder has a long groove, and the inner hole of the middle plate has a protrusion that protrudes into the long groove on the upper part of the tool holder, so that the middle plate can move up and down but cannot rotate; a vertical line or triangular line is engraved on the outer cylindrical surface of the middle plate relative to the zero point of the scale, so as to determine the amount of rotation of the scale.

4. The precision-adjusting tool holder for metal cutting according to claim 1, characterized in that, The graduations on the dial correspond to the pitch of the thread on the lower part of the feed sleeve. Therefore, the reading on the rotating dial is the distance the sliding force box moves, which is the feed amount of the cutting tool.

5. The precision-adjusting tool holder for metal cutting according to claim 1, characterized in that, The bottom hole of the tool holder has a trapezoidal cross section and contains a sliding force box, which also has a trapezoidal cross section. There is a boss on the tool holder hole at the top of the sliding tool box to install a spring. The spring presses against the top of the sliding force box. A gap adjustment plate is installed between the bottom of the sliding tool box and the bottom of the tool holder hole. The gap adjustment plate ensures that the sliding tool box slides smoothly. The two ends of the gap adjustment plate are bent and wrapped around the bottom of the tool holder to prevent it from falling off.

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