CN-121988767-A - Lathe turning cutter bar capable of being fast-assembled and locked and locking method

Abstract

The invention discloses a lathe turning cutter bar capable of being fast-assembled and locked and a locking method, and belongs to the technical field of numerical control lathe cutters. The turning tool rod comprises a tool bar with a protruding insert at the end, positioning strips attached to two sides of the insert are arranged at one end of the tool bit, which is matched with the tool bar, symmetrical limiting grooves are formed in the upper side face and the lower side face of the insert, locking blocks are mounted in the limiting grooves in a matched mode, symmetrical positioning grooves are formed in the upper side face and the lower side face of the positioning strips, the side portions of the locking blocks are correspondingly positioned in the positioning grooves of the positioning strips, a rotating rod penetrates through the insert and the two locking blocks, and pressing caps used for pressing the outer ends of the locking blocks are sleeved at the two ends of the rotating rod. The cutter head and the cutter bar are in push-in fit, synchronous driving and locking are carried out through the single rotating rod, the disassembly and assembly steps are simplified, the replacement efficiency of the cutter head is greatly improved, and radial, axial and circumferential limiting can be automatically carried out on the cutter head and the cutter bar during compaction through the locking piece, the limiting groove and the positioning groove with the conical surface matched, so that accurate centering in the three-dimensional direction is realized, and the repeated installation accuracy of the cutter head is effectively ensured.

Inventors

• LI XIAODONG
• ZHANG ZIHAN

Assignees

• 安徽安丰智控科技有限公司

Dates

Publication Date

20260508

Application Date

20260408

Claims (10)

1. 1. The utility model provides a lathe cutter arbor that can fast-assembling locking which characterized in that includes: the end part of the cutter bar is provided with a convex insert; the cutter head is provided with a positioning strip attached to two sides of the insertion block at one end matched with the cutter bar; The positioning strip comprises an inserting block, a positioning strip and a positioning strip, wherein the upper side surface and the lower side surface of the inserting block are provided with symmetrical limiting grooves, and locking blocks are cooperatively arranged in the limiting grooves; The bottoms of the two limiting grooves are communicated through a threaded hole, a central through hole opposite to the threaded hole is formed in the axis of the locking block, a rotating rod penetrates through the central through hole and the threaded hole, two ends of the rotating rod are axially sleeved with pressing caps in a sliding mode, the pressing caps are used for pressing the outer ends of the locking block, one ends of the pressing caps are in threaded connection with the threaded hole, and an elastic piece used for inwards pressing the locking block is arranged between the pressing caps and the locking block.
2. 2. The lathe tool bar capable of being quickly locked according to claim 1, wherein the limit groove on the insert block is conical, two sides of the limit groove are communicated with the side surface of the insert block, and a notch communicated with the limit groove is formed on the side surface of the insert block; The positioning grooves on the positioning strips are conical surfaces, and the positioning grooves on the positioning strips on the two sides are aligned with the notches on the side surfaces of the limiting grooves to form complete conical grooves.
3. 3. The quick locking lathe tool bar according to claim 2, wherein the locking piece comprises a conical body part matched with the limiting groove and the positioning groove, and a cylindrical body part is fixed at one end of the conical body part far away from the limiting groove.
4. 4. The quick locking lathe tool bar according to claim 3, wherein the upper and lower ends of the inner side surface of the positioning strip are provided with guide grooves, and the positioning grooves are formed in the bottom surfaces of the guide grooves; one end of the bottom surface of the guide groove is provided with a guide inclined plane which is convenient for the conical body of the locking block to enter, and the side surface of the guide groove is matched with the cylindrical body of the locking block.
5. 5. The quick-assembling locking lathe tool bar according to claim 1, wherein the end of the tool bar is provided with a circle of check ring coaxial with the axis of the insert block; the outer side surface of the positioning strip is an arc-shaped surface, and the end part of the positioning strip is matched and attached to the inner wall of the check ring.
6. 6. The lathe tool bar capable of being locked quickly according to claim 1, wherein two guide grooves which are uniformly distributed and parallel to the central through hole are formed in the peripheral surface of the locking block, guide blocks are arranged in the guide grooves in a sliding fit mode, and the guide blocks are fixed on the inserting blocks.
7. 7. The lathe tool bar capable of being locked in a quick-assembling mode according to claim 1, wherein the pressing cap comprises a stud, a cap body and a shoulder, the stud is connected with a threaded hole in the insertion block in a matched mode, the stud is arranged at the inner end of the stud and is used for pressing the locking block, the cap body is arranged at the outer end of the stud, and the shoulder is used for limiting the elastic piece at one end, close to the cap body, of the stud.
8. 8. The quick locking lathe tool bar according to claim 7, wherein the elastic piece is sleeved between the stud and the central through hole of the locking piece, the shoulder of the stud is sleeved with a slip ring which is propped against the outer end of the elastic piece, and the inner end of the central through hole of the locking piece is provided with a boss which is propped against the inner end of the elastic piece.
9. 9. The lathe tool bar capable of being quickly locked according to any one of claims 1, 7 and 8, which is characterized in that the cross sections of the axle center holes of the rotating rod and the pressing cap are polygonal, one end of the rotating rod is fixed with a limit bolt for preventing the rotating rod from being separated from the pressing cap, and the other end of the rotating rod is fixed with a shoulder for preventing the rotating rod from being separated from the pressing cap; when the rotating rod drives the two press caps to synchronously rotate positively and negatively, the two press caps are synchronously similar or separated.
10. 10. A turning tool bar locking method, which adopts the turning tool bar capable of being locked in a fast-assembling way according to any one of claims 1 to 9, and is characterized by comprising the following steps: Rotating the rotating rod to enable the two press caps to be farthest from each other; Attaching two positioning strips on the cutter head to the insertion block end of the cutter bar, and pushing the cutter head to the cutter bar until the side part of the locking block enters the positioning groove of the positioning strips; And rotating the rotating rod to enable the two pressing caps to be closest to each other, and pressing the locking block by the pressing caps in the limiting groove of the inserting block and the locating groove of the locating strip.

Description

Lathe turning cutter bar capable of being fast-assembled and locked and locking method Technical Field The invention relates to the technical field of numerically controlled lathes, in particular to a lathe cutter bar capable of being fast-assembled and locked and a locking method. Background The lathe tool is lathe core cutting tool, and wherein, the locking structure of tool bit and lathe tool pole needs to realize that the tool bit is effective spacing in all directions such as radial, axial and circumference, prevents that the tool bit from taking place displacement, becoming flexible or rotating under complicated operating modes such as high-speed cutting, vibration. At present, the main lathe tool bar and tool bit locking structure on the market mainly adopts modes of multi-group bolt step locking, or wedge block clamping adjustment and the like, so that the multidirectional positioning of the tool bit is completed, the positioning and the locking part operation are required to be performed for many times during the assembly, the steps are complicated, meanwhile, the positioning and locking functions are mutually independent, an effective automatic centering mechanism is lacked, the limit matching surface is mostly an inclined surface and a cylindrical surface, the accurate centering of the tool bit and the tool bit bar is difficult to realize, and the repeated installation precision of the tool bit is poor. Disclosure of Invention Aiming at the technical defects, the invention provides a lathe cutter bar capable of being quickly assembled and locked and a locking method, wherein a positioning groove between a cutter head and the cutter bar can be butted into a complete conical groove, and the automatic centering and locking are realized by matching with the compression positioning of a conical body. The invention adopts the following technical scheme that the lathe tool rod capable of being fast-assembled and locked comprises: the end part of the cutter bar is provided with a convex insert; the cutter head is provided with a positioning strip attached to two sides of the insertion block at one end matched with the cutter bar; The positioning strip comprises an inserting block, a positioning strip and a positioning strip, wherein the upper side surface and the lower side surface of the inserting block are provided with symmetrical limiting grooves, and locking blocks are cooperatively arranged in the limiting grooves; The bottoms of the two limiting grooves are communicated through a threaded hole, a central through hole opposite to the threaded hole is formed in the axis of the locking block, a rotating rod penetrates through the central through hole and the threaded hole, two ends of the rotating rod are axially sleeved with pressing caps in a sliding mode, the pressing caps are used for pressing the outer ends of the locking block, one ends of the pressing caps are in threaded connection with the threaded hole, and an elastic piece used for inwards pressing the locking block is arranged between the pressing caps and the locking block. Preferably, the limit groove on the insert block is conical, and two sides of the limit groove are communicated with the side surface of the insert block, so that a notch communicated with the limit groove is formed on the side surface of the insert block; The positioning grooves on the positioning strips are conical surfaces, and the positioning grooves on the positioning strips on the two sides are aligned with the notches on the side surfaces of the limiting grooves to form complete conical grooves. Preferably, the locking block comprises a conical body part matched with the limit groove and the positioning groove, and a cylindrical body part is fixed at one end of the conical body part far away from the limit groove. Preferably, the upper end and the lower end of the inner side surface of the positioning strip are both provided with guide grooves, and the positioning grooves are formed in the bottom surfaces of the guide grooves; one end of the bottom surface of the guide groove is provided with a guide inclined plane which is convenient for the conical body of the locking block to enter, and the side surface of the guide groove is matched with the cylindrical body of the locking block. Preferably, the end part of the cutter bar is provided with a check ring coaxial with the axis of the insertion block; the outer side surface of the positioning strip is an arc-shaped surface, and the end part of the positioning strip is matched and attached to the inner wall of the check ring. Preferably, two uniformly distributed guide grooves parallel to the central through hole are formed in the peripheral surface of the locking block, guide blocks are arranged in the guide grooves in a sliding fit mode, and the guide blocks are fixed on the inserting blocks. The pressing cap comprises a stud at the inner end which is connected with a threaded hole in the insertion block in a m