A lock holder for processing a thread rolling die

Abstract

The utility model belongs to the technical field of lock tool holder, and particularly point to a lock tool holder for processing thread rolling plate, it includes: installation base body, vertical tool holder is located on installation base body, vertical tool holder has one upper and lower through insertion hole, and the insertion hole 3 is used for installing the tool bar, at least one clamping unit is located on the lateral wall of vertical tool holder, and the clamping unit includes a clamping rod and a spring element, and the clamping rod is movably arranged on the lateral wall of vertical tool holder along the radial direction, wherein, the clamping rod has a clamping head, and the clamping head protrudes into the insertion hole under the elastic force of spring element, and is used to be embedded in a clamping groove provided on the outer circumferential surface of the tool bar handle, so as to prevent the relative rotation of the tool bar. The utility model can obtain a lock tool holder for processing thread rolling plate with stable positioning and convenient tool changing through the above technical scheme.

Description

Technical Field

[0001] This utility model belongs to the technical field of locking tool holders, and specifically refers to a locking tool holder used for processing thread rolling plates. Background Technology

[0002] Thread rolling dies are specialized cutting tools used for machining threads. During the manufacturing or regrinding of thread rolling dies, the die body mounted on the front end of the dies needs to be frequently replaced. A locking seat is used to stably hold the dies when changing tools, allowing operators to easily install and remove the nut at the front end of the dies.

[0003] Existing vertical tool holders mostly employ a circumferential positioning structure where a fixed protrusion passively engages with a groove on the tool shank. The protrusion is integral and cannot be replaced, leading to irreversible increases in clearance after long-term friction and wear. Furthermore, positioning is only on one side, making the tool shank prone to wobbling under torsional forces, causing tool setting deviations, inefficient assembly and disassembly, and potential damage to the thread rolling die and tool shank. Additionally, the lack of an automatic locking mechanism necessitates manual alignment during tool changes, making operation cumbersome and unsuitable for rapid batch tool changes. Therefore, there is an urgent need for a stable positioning tool holder that facilitates tool changes for machining thread rolling dies. Utility Model Content

[0004] This invention utilizes the elastic force of an elastic element to cause the clamping head of the clamping rod to protrude normally into the insertion hole, thereby actively locking it into the groove of the tool holder and effectively preventing relative rotation of the tool holder, thus solving the problems mentioned in the background art.

[0005] The purpose of this utility model is achieved as follows: a locking holder for processing thread rolling plates, comprising: Mounting substrate; A vertical tool holder is provided on the mounting base. The vertical tool holder has a through-hole for installing a tool bar. At least one clamping unit is disposed on the side wall of the vertical tool holder. The clamping unit includes a clamping rod and an elastic element. The clamping rod is radially movably inserted through the side wall of the vertical tool holder. The clamping rod has a clamping head, which protrudes into the insertion hole under the elastic force of the elastic element to fit into a groove on the outer circumferential surface of the tool holder, so as to prevent the tool holder from rotating relative to each other.

[0006] The present invention is further configured such that the clamping rod includes a first rod portion and a second rod portion, the first rod portion is located at one end near the outer side and has an operating head, the second rod portion is located at one end near the inner side and is connected to the first rod portion, and the clamping head is located at the inner end of the second rod portion.

[0007] The present invention is further configured such that the two sets of clamping units are disposed opposite to each other on both sides of the vertical tool holder.

[0008] The present invention is further configured such that the clamping head has a guide slope, which is used to abut against the handle of the tool bar when the tool bar is inserted, so as to guide the clamping rod to move outward.

[0009] The present invention is further configured such that the elastic element is a compression spring, the compression spring is sleeved on the outer periphery of the clamping rod, and is located in a cavity formed inside the side wall of the vertical tool holder.

[0010] The present invention is further configured such that the vertical tool holder is connected to the mounting base by multiple bolts, and the mounting base is provided with a positioning groove adapted to the lower part of the vertical tool holder.

[0011] The present invention is further configured such that the clamping head is threadedly connected to the inner end of the second rod.

[0012] By adopting the above technical solution, the beneficial effects that this utility model can achieve are: 1. The clamping head, under the elastic force of the elastic element, normally protrudes into the insertion hole and engages with the groove on the tool holder, thereby achieving active locking of the tool holder and improving the stability and reliability of the tool holder fixation.

[0013] 2. The design of the detachable and replaceable clamping head reduces equipment maintenance costs and allows for adaptation to different specifications of tool holders without replacing the entire tool holder, thus improving the versatility of the device.

[0014] 3. By setting two sets of clamping units opposite each other on both sides of the vertical tool holder, and with the threaded connection structure between the clamping head and the second rod, the tool holder is balanced and the clamping head is replaceable and maintainable, which improves the overall performance and adaptability of the device. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 This is a utility model Figure 2 A magnified structural diagram of part A.

[0016] The reference numerals in the figure are as follows: 1. Mounting base; 2. Vertical tool holder; 3. Insertion hole; 4. Clamping unit; 5. Clamping rod; 6. Elastic element; 7. Clamping head; 8. Clamping groove; 9. First rod part; 10. Second rod part; 11. Operating head; 12. Guide slope; 13. Chamber; 14. Bolt; 15. Positioning groove. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figures 1-3 : Example 1:

[0018] This embodiment provides a locking holder for machining thread rolling plates, including: Mounting base 1; A vertical tool holder 2 is disposed on the mounting base 1. The vertical tool holder 2 has a vertically penetrating insertion hole 3, which is used to install a tool bar. At least one clamping unit 4 is disposed on the side wall of the vertical tool holder 2. The clamping unit 4 includes a clamping rod 5 and an elastic element 6. The clamping rod 5 is radially movable through the side wall of the vertical tool holder 2. The clamping rod 5 has a clamping head 7, which protrudes into the insertion hole 3 under the elastic force of the elastic element 6, and is fitted into a groove 8 provided on the outer peripheral surface of the tool holder to prevent the tool holder from rotating relative to each other.

[0019] This design provides a locking tool holder for machining thread rolling dies, comprising a mounting base 1 and a vertical tool holder 2. The mounting base 1 is typically block-shaped and serves to support and fix the vertical tool holder 2. The vertical tool holder 2, mounted on the mounting base 1, holds the tool shank and is generally cylindrical in shape. A through-hole 3, typically circular, is located at the center of the vertical tool holder 2, with a diameter slightly larger than the outer diameter of the tool shank shank, allowing the tool shank shank to be inserted from top to bottom.

[0020] At least one locking unit 4 is provided on the side wall of the vertical tool holder 2. The locking unit 4 is an independent functional component used to lock the tool holder. The locking unit 4 includes a locking rod 5 and an elastic element 6. The locking rod 5 is a rod-shaped part that is radially movable and passes through the side wall of the vertical tool holder 2, and its axis intersects perpendicularly with the axis of the insertion hole 3. The locking rod 5 is capable of reciprocating in a direction perpendicular to the axis of the insertion hole 3. The elastic element 6 is installed in the side wall of the vertical tool holder 2 and cooperates with the locking rod 5 to apply a continuous elastic force to the locking rod 5, so that the locking rod 5 always has a tendency to move towards the center of the insertion hole 3.

[0021] The clamping rod 5 has a clamping head 7 at one end facing the insertion hole 3. This clamping head 7 is the working part of the front end of the clamping rod 5, and its shape is adapted to the groove 8 opened on the outer circumference of the tool holder. Specifically, it can be cylindrical or hemispherical. Under the elastic force of the elastic element 6, the clamping head 7 normally protrudes into the insertion hole 3. When the tool holder is inserted into the insertion hole 3, the tool holder needs to be rotated to align the groove 8 on the holder with the clamping head 7. At this time, the elastic element 6 pushes the clamping rod 5 to move towards the center of the insertion hole 3, so that the clamping head 7 is embedded in the groove 8. Through the engagement of the clamping head 7 and the groove 8, the tool holder is circumferentially locked and cannot rotate relative to the vertical tool holder 2, thereby ensuring that the tool holder remains stationary when disassembling and assembling the thread rolling plate.

[0022] Furthermore, the clamping rod 5 adopts a split structure design. It includes a first rod portion 9 and a second rod portion 10. The first rod portion 9 is located at the outer end of the clamping rod 5, extending to the outside of the vertical tool holder 2. An operating head 11 is integrally formed or fixedly connected to this end by fasteners. The operating head 11 can be a protruding handle, a groove, or any structure that facilitates hand force application, allowing the operator to pull or push the clamping rod 5 with their fingers. The operating head 11 is a pull rod structure, and the pull rod can be fixed to the first rod portion 9 by a threaded connection. The operator can quickly pull the clamping rod 5 outward by operating the pull rod, which is convenient and effortless, and suitable for one-handed operation on site. The second rod portion 10 is located at the inner end of the clamping rod 5, and its inner end extends to the vicinity of the insertion hole 3. The first rod portion 9 and the second rod portion 10 are coaxially connected, and the two can be fixed together by threaded connection or insertion, forming a whole clamping rod 5. The clamping head 7 is specifically located at the inner end of the second rod 10, and is part of the front end of the second rod 10.

[0023] To improve the balance and reliability of the locking mechanism, two sets of clamping units 4 can be arranged opposite each other on both sides of the vertical tool holder 2. These two sets of clamping units 4 have identical structures and are symmetrically arranged relative to the central axis of the insertion hole 3. When the tool bar is inserted, the clamping heads 7 of the two sets of clamping units 4 simultaneously engage with the corresponding two slots 8 on both sides of the tool bar shank from opposite directions, forming a locking state of opposing clamping, thus making the force on the tool bar more balanced.

[0024] To optimize operational smoothness, a guide ramp 12 is provided on the clamping head 7. This guide ramp 12 is located on the side of the clamping head 7 facing the upper opening of the insertion hole 3, and is an inclined plane or curved surface. Its function is that when the shank of the tool bar is inserted downwards into the insertion hole 3, the lower end of the shank will first contact the guide ramp 12. As the tool bar continues to move downwards, the shank applies pressure to the guide ramp 12. The horizontal component of this pressure overcomes the elastic force of the elastic element 6, pushing the clamping rod 5, along with the clamping head 7, to move away from the center of the insertion hole 3. This causes the clamping head 7 to retract into the side wall of the vertical tool holder 2, making room for the insertion of the tool bar. Once the tool bar is inserted into place, the operator only needs to rotate the tool bar to align the slot 8 with the position of the clamping head 7. The elastic force of the elastic element 6 will automatically push the clamping head 7 into the slot 8, achieving automatic locking.

[0025] The elastic element 6 can be implemented using a compression spring. This compression spring is sleeved around the outer periphery of the second rod portion 10 of the clamping rod 5. In conjunction with this, a cavity, called chamber 13, is formed inside the side wall of the vertical tool holder 2. The size of chamber 13 is larger than the diameter of the clamping rod 5, used to accommodate the compression spring. Chamber 13 is a cylindrical cavity integrally machined from the side wall of the vertical tool holder 2. The inner wall of chamber 13 is clearance-fitted with the outer wall of the clamping rod 5, providing linear guidance for the radial movement of the clamping rod 5, preventing skew and jamming during movement, and ensuring accurate engagement of the clamping head 7 and the slot 8. The second rod portion 10, along with the compression spring thereon, passes through and is housed within chamber 13. One end of the compression spring abuts against the inner wall of chamber 13, and the other end abuts against a step surface or retaining ring of the clamping rod 5. The second rod portion 10 of the clamping rod 5 has an integrally formed annular step on its outer circumference. The inner end of the compression spring abuts against the annular step. The inner wall of the chamber 13 has an integrally formed spring abutment platform. The outer end of the compression spring abuts against the spring abutment platform. The double limit prevents the compression spring from moving or falling off in the chamber 13.

[0026] The vertical tool holder 2 is fixedly connected to the mounting base 1 by multiple bolts 14. A positioning groove 15 is formed on the upper surface of the mounting base 1. This positioning groove 15 is a downwardly recessed countersunk structure, its outline matching the lower shape of the vertical tool holder 2. During installation, the lower part of the vertical tool holder 2 is embedded in the positioning groove 15, causing part of the vertical tool holder 2 to sink into the mounting base 1, rather than simply resting on the upper surface of the mounting base 1. Subsequently, multiple bolts 14 pass through the flange edge or connecting lug of the vertical tool holder 2 and are locked to the mounting base 1. The sidewall of the positioning groove 15 fits against the lower outer circumferential surface of the vertical tool holder 2. This positioning groove 15 is a square-shaped locating groove 15, forming a circumferential anti-rotation limit for the vertical tool holder 2, preventing the vertical tool holder 2 from rotating relative to the mounting base 1 under torsional force, further improving the overall torsional stability of the tool holder.

[0027] The clamping head 7 and the second rod 10 are fixed by a threaded connection. Specifically, the inner end of the second rod 10 is machined with external threads, while the clamping head 7 is machined with a matching internal threaded hole. The clamping head 7 is screwed onto the inner end of the second rod 10. This detachable connection makes the clamping head 7 an independent consumable part. When the clamping head 7 wears out after long-term use, it can be unscrewed and replaced separately without replacing the entire clamping rod 5. Furthermore, for tool holders of different specifications or with different slot 8 shapes, the corresponding clamping head 7 can be quickly replaced, improving the adaptability and maintenance convenience of the device. Moreover, the clamping head 7 and the second rod 10 can be connected by a self-locking thread. After screwing, no additional locking parts are needed to prevent loosening due to long-term vibration, ensuring the clamping head 7 is securely installed and facilitating quick disassembly and replacement after wear.

[0028] In this embodiment, through the above-described technical solution, in the initial state, the elastic element 6 pushes the locking rod 5, causing the locking head 7 to normally protrude into the insertion hole 3. When the operator performs a tool change, if the tool bar needs to be placed vertically, simply align the handle of the tool bar with the insertion hole 3 and insert it downwards. During insertion, the lower end of the tool bar handle first contacts the guide slope 12 of the locking head 7, pressing the locking head 7 to retract outwards against the spring force, allowing the tool bar to be smoothly inserted to the bottom. Subsequently, the operator slightly rotates the tool bar, and when the retaining groove 8 on the handle rotates to the position aligned with the locking head 7, the elastic element 6 automatically pushes the locking head 7 into the retaining groove 8, accompanied by a "click" sound and a tactile feedback, indicating that the tool bar has been locked, and the tool bar can be disassembled or assembled. When it is necessary to remove the tool bar, the operator pulls the operating head 11 to pull the locking rod 5 outwards, causing the locking head 7 to exit the retaining groove 8, releasing the lock, at which point the tool bar can be pulled upwards. It should be noted that when unlocking, the operating head 11 should be pulled outward until the tool bar is completely pulled out of the insertion hole 3 before releasing the operating head 11. The locking rod 5 will automatically reset under the action of the elastic element 6, and the locking head 7 will re-extend into the insertion hole 3, waiting for the next insertion and locking of the tool bar.

[0029] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A locking tool holder for machining thread rolling dies, characterized in that, include: Mounting base (1); A vertical tool holder (2) is provided on the mounting base (1). The vertical tool holder (2) has a vertically penetrating insertion hole (3) for installing a tool bar. At least one clamping unit (4) is provided on the side wall of the vertical tool holder (2). The clamping unit (4) includes a clamping rod (5) and an elastic element (6). The clamping rod (5) is radially movable through the side wall of the vertical tool holder (2). The clamping rod (5) has a clamping head (7), which protrudes into the insertion hole (3) under the elastic force of the elastic element (6) to fit into a groove (8) provided on the outer circumferential surface of the tool holder to prevent the tool holder from rotating relative to each other.

2. A locking tool holder for processing thread rolling plates according to claim 1, characterized in that, The clamping rod (5) includes a first rod portion (9) and a second rod portion (10). The first rod portion (9) is located at one end near the outside and has an operating head (11). The second rod portion (10) is located at one end near the inside and is connected to the first rod portion (9). The clamping head (7) is located at the inner end of the second rod portion (10).

3. A locking tool holder for processing thread rolling plates according to claim 1, characterized in that, The two sets of clamping units (4) are disposed opposite each other on both sides of the vertical tool holder (2).

4. A locking holder for machining thread rolling plates according to claim 1, characterized in that, The clamping head (7) has a guide slope (12) which abuts against the handle of the tool bar when the tool bar is inserted, so as to guide the clamping rod (5) to move outward.

5. A locking tool holder for processing thread rolling plates according to claim 1, characterized in that, The elastic element (6) is a compression spring, which is sleeved on the outer periphery of the clamping rod (5) and located in a cavity (13) formed in the side wall of the vertical knife holder (2).

6. A locking tool holder for machining thread rolling plates according to claim 1, characterized in that, The vertical tool holder (2) is connected to the mounting base (1) by multiple bolts (14), and the mounting base (1) is provided with a positioning groove (15) that is adapted to the lower part of the vertical tool holder (2).

7. A locking holder for machining thread rolling plates according to claim 2, characterized in that, The clamping head (7) is threadedly connected to the inner end of the second rod (10).

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