An adaptive tool holder locking device for a tool presetter

Abstract

The present application relates to the field of machine tool cutters, and particularly to a self-adaptive cutter holder locking device for a cutter pre-adjusting instrument, comprising a base, a clamping assembly, a positioning plate, a tensioning mechanism, a control rod and a transmission cylinder; the base is sequentially provided with a first mounting groove, a second mounting groove, a third mounting groove and a fourth mounting groove from one end to the other end; one end of the clamping assembly is located in the first mounting groove, and the other end protrudes from the third mounting groove and is located in the fourth mounting groove, and is used for clamping the cutter holder when being retracted into the third mounting groove; the positioning plate is fixed to the bottom of the first mounting groove, and is elastically connected to the part of the clamping assembly located in the second mounting groove through a spring; the tensioning mechanism is used for clamping one end of the clamping assembly located in the first mounting groove; one end of the control rod is abutted against one end of the tensioning mechanism away from the clamping assembly; and the transmission cylinder is used for driving the control rod to move in the axial direction, so as to adjust the tensioning state of the tensioning mechanism. The present application does not need to rely on manual operation and is simple to operate.

Description

Technical Field

[0001] This invention relates to the field of machine tool cutting tools, and in particular to an adaptive tool holder locking device for a tool pre-setting instrument. Background Technology

[0002] A tool presetting device, also known as a tool setter, is a measuring device that can pre-adjust and measure the tool tip diameter and clamping length, and input tool data into the NC program of a machining center. A tool holder is a connecting tool, a fixture used in the machining field to connect the spindle of a vertical milling machine to the cutting tool and other accessories. When using a vertical milling machine, the milling cutter needs to be mounted and connected to the spindle via the tool holder, or it is also necessary to connect the tool holder to the spindle when changing the milling cutter.

[0003] Currently, vacuum tightening or manual tightening is commonly used when locking tool holders. However, traditional tool pre-adjusters often rely on manual operation when tightening BT30 tool holders, which results in complex operation, uneven tightening force, and low efficiency. Summary of the Invention

[0004] Therefore, it is necessary to provide an adaptive tool holder locking device for tool pre-adjustment instruments to address the above-mentioned technical problems. The entire operation process does not require manual intervention, is simple to operate, provides uniform tension, and has relatively high efficiency.

[0005] This invention provides an adaptive tool holder locking device for a tool pre-setting instrument, comprising:

[0006] The base has a first mounting slot, a second mounting slot, a third mounting slot and a fourth mounting slot sequentially formed from one end to the other.

[0007] The clamping assembly has one end located in the first mounting groove and the other end protruding from the third mounting groove and located in the fourth mounting groove, and is used to clamp the tool holder when it retracts into the third mounting groove;

[0008] The positioning plate is fixed to the bottom of the first mounting groove and is elastically connected to the portion of the clamping assembly located in the second mounting groove by a spring.

[0009] A tensioning mechanism is used to clamp one end of the clamping assembly located in the first mounting groove;

[0010] The control lever has one end abutting against the end of the tensioning mechanism away from the clamping assembly;

[0011] A transmission cylinder is used to drive the control rod to move in the axial direction, thereby adjusting the tension state of the tensioning mechanism.

[0012] In one embodiment, a first inclined surface is provided at the connection between the third mounting groove and the fourth mounting groove, and a plurality of first guide grooves are provided in a circular array on the side wall of the clamping component. A ball is movably installed in the first guide groove, and a plurality of second guide grooves are provided on the inner wall of the clamping component. The second guide grooves coincide with the axis of the first guide grooves and are interconnected.

[0013] In one embodiment, when the transmission cylinder drives the control rod away from the fourth mounting groove, one side of the ball abuts against the first inclined surface, and the other side of the ball passes through the second guide groove and abuts against the tool holder.

[0014] In one embodiment, the base sidewall is provided with a plurality of transverse mounting slots in a circular array, and a sliding block is movably mounted in each transverse mounting slot. The first inclined surface is provided on the side of the sliding block facing the ball. A third guide groove is provided along the radius of the base at the end of the sliding block facing the ball. When the sliding block moves along the axial direction of the base, the ball can be replaced with a spare ball in the third guide groove.

[0015] In one embodiment, a first limiting groove is provided at the opening of the third guide groove, and a second inclined surface is provided between the first limiting groove and the first inclined surface. In a first state, the first inclined surface and the ball are at the same horizontal position, and in a second state, the first limiting groove is directly opposite the ball.

[0016] In one embodiment, a guide post is provided on the bottom surface of the transverse mounting groove, and a second limiting groove is provided on the bottom surface of the sliding block, with the guide post being movably inserted into the second limiting groove.

[0017] In one embodiment, a rotating tube is rotatably mounted on the end of the sliding block away from the ball, and two fourth guide grooves are provided inside the rotating tube, with one of the fourth guide grooves coinciding with the axis of the third guide groove.

[0018] In one embodiment, the inner wall of the fourth guide groove is provided with a plurality of annular grooves arranged in a linear array, and the plurality of annular grooves are located at the end of the fourth guide groove away from the third guide groove.

[0019] In one embodiment, an elastic sheet is installed at the end of the fourth guide groove away from the third guide groove. The elastic sheet is provided with an arc-shaped protruding structure and will deform to protrude to the other side when subjected to force.

[0020] In one embodiment, the two elastic sheets protrude in opposite directions.

[0021] The aforementioned adaptive tool holder locking device for the tool pre-adjustment instrument first inserts the tool holder into the clamping assembly, then activates the transmission cylinder to drive the control rod, causing the control rod to move along the axial direction of the base. Since the end of the control rod abuts against the end of the tensioning mechanism away from the clamping assembly, the end of the tensioning mechanism facing the clamping assembly moves and tightly engages with the end of the clamping assembly after being affected by the movement of the end of the control rod. As a result, the clamping assembly also moves with the movement of the control rod. As the clamping assembly is pulled away from the fourth mounting slot, the end of the tool holder located in the clamping assembly is also tightly fixed in the clamping assembly. The entire operation process does not require manual intervention, is simple to operate, provides uniform tension, and has relatively high efficiency. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is one of the partial structural schematic diagrams of the tool holder locking device provided by the present invention;

[0024] Figure 2 A second partial structural schematic diagram of the tool holder locking device provided by the present invention;

[0025] Figure 3 This is the third partial structural schematic diagram of the tool holder locking device provided by the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the mounting component in the transverse mounting groove provided by the present invention;

[0027] Figure 5 A schematic diagram of the structure of the transverse mounting groove provided by the present invention;

[0028] Figure 6 This is one of the structural schematic diagrams of the sliding block provided by the present invention;

[0029] Figure 7 This is the second schematic diagram of the sliding block provided by the present invention;

[0030] Figure 8 This is a schematic diagram illustrating the usage state of the sliding block provided by the present invention.

[0031] Figure label:

[0032] 110. Base; 111. First mounting slot; 112. Second mounting slot; 113. Third mounting slot; 114. Fourth mounting slot; 115. Lateral mounting slot; 116. Guide post; 120. Clamping assembly; 121. First guide slot; 122. Second guide slot; 130. Positioning plate; 140. Spring; 150. Adjustment mechanism; 160. Control rod; 170. Transmission cylinder; 180. Control system; 190. Tensioning mechanism; 200. Ball bearing; 310. Sliding block; 311. Third guide slot; 312. First limiting slot; 313. First inclined surface; 314. Second inclined surface; 315. Second limiting slot; 320. Rotating tube; 321. Fourth guide slot; 322. Annular groove; 330. Elastic sheet. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] The following is combined with Figures 1 to 8 The present invention describes an adaptive tool holder locking device for a tool pre-setting instrument.

[0035] like Figures 1 to 3 As shown, in one embodiment, an adaptive tool holder locking device for a tool pre-adjustment includes a base 110, a clamping assembly 120, a positioning plate 130, a tensioning mechanism 190, a control rod 160, and a transmission cylinder 170. The base 110 has a first mounting groove 111, a second mounting groove 112, a third mounting groove 113, and a fourth mounting groove 114 sequentially formed from one end to the other. One end of the clamping assembly 120 is located within the first mounting groove 111, and the other end protrudes from the third mounting groove 113 and is located within the fourth mounting groove 114, for clamping the tool holder in the third mounting groove 111. When the groove 113 retracts, it clamps the tool holder; the positioning plate 130 is fixed to the bottom of the first mounting groove 111 and is elastically connected to the part of the clamping assembly 120 located in the second mounting groove 112 by a spring 140; the tensioning mechanism 190 is used to clamp one end of the clamping assembly 120 located in the first mounting groove 111; one end of the control rod 160 abuts against the end of the tensioning mechanism 190 away from the clamping assembly 120; the transmission cylinder 170 is used to drive the control rod 160 to move in the axial direction, thereby adjusting the tensioning state of the tensioning mechanism 190.

[0036] Specifically, the tensioning mechanism 190 is arranged in the shape of a clamp, and preferably has three clamps. Before locking the tool holder, since the end of the clamping assembly 120 used to install the tool holder passes through the third mounting groove 113 and is located in the fourth mounting groove 114, the tool holder is first inserted into the clamping assembly 120. Then, the transmission cylinder 170 is activated to drive the control lever 160, causing the control lever 160 to move along the axial direction of the base 110. Since the end of the control lever 160 abuts against the tensioning mechanism... The end of the tensioning mechanism 190 away from the clamping assembly 120 is moved by the movement of the end of the control lever 160. The end of the tensioning mechanism 190 facing the clamping assembly 120 will move and be tightly fastened to the end of the clamping assembly 120. As a result, the clamping assembly 120 will also move with the movement of the control lever 160. As the clamping assembly 120 is pulled away from the fourth mounting groove 114, the end of the tool holder located in the clamping assembly 120 will also be tightly fixed in the clamping assembly 120.

[0037] The aforementioned adaptive tool holder locking device for the tool pre-adjustment instrument first inserts the tool holder into the clamping assembly 120. Then, the transmission cylinder 170 is activated to drive the control rod 160, causing the control rod 160 to move axially along the base 110. Since the end of the control rod 160 abuts against the end of the tensioning mechanism 190 away from the clamping assembly 120, the end of the tensioning mechanism 190 facing the clamping assembly 120 will move and tightly fasten to the end of the clamping assembly 120 after being affected by the movement of the end of the control rod 160. As a result, the clamping assembly 120 will also move with the movement of the control rod 160. As the clamping assembly 120 is pulled away from the fourth mounting groove 114, the end of the tool holder located in the clamping assembly 120 will also be tightly fixed in the clamping assembly 120. The entire operation process does not require manual intervention, is simple to operate, has uniform tension, and is relatively efficient.

[0038] The control lever 160 is provided with an adjustment mechanism 150 and a control system 180 on its outer side. The adjustment mechanism 150 is used to adjust the position and angle of the clamping assembly 120 and the tensioning mechanism 190 to adapt to BT30 tool holders of different sizes. The control system 180 is used to preset the extension and retraction amount and tension force of the adaptive clamping assembly 120.

[0039] Specifically, before use, based on the size and shape of the BT30 tool holder, the control system 180 presets the extension and tension of the clamping assembly 120, and simultaneously adjusts the adjustment mechanism 150 to place the clamping assembly 120 and the tensioning mechanism 190 in appropriate positions and angles.

[0040] The BT30 tool holder is placed between the jaws with the clamping assembly 120. The control system 180 activates the control lever 160 to move the jaws, so that the jaws automatically adapt to the size of the tool holder and clamp it evenly. During the clamping process, the extension and contraction of the jaws and the clamping force can be monitored in real time, and the control system 180 can provide feedback adjustment to ensure the uniformity and stability of the clamping force.

[0041] After clamping is completed, the adjustment mechanism 150 is activated by the control system 180 to generate sufficient tension to fix the tool holder on the jaws. The magnitude of the tension can be precisely controlled according to a preset value or an automatic adjustment system. At the same time, the magnitude of the tension can be monitored in real time by a sensor, and the control system 180 can provide feedback adjustment to ensure the uniformity and stability of the tension.

[0042] If the angle of the tool holder needs to be adjusted, the angle adjustment device of the adjustment mechanism 150 can be driven by the control system 180 to make the clamping assembly 120 and the tensioning mechanism 190 rotate precisely relative to the base 110. After the angle adjustment is completed, the above clamping and tensioning steps can be repeated to achieve precise pre-adjustment of the tool holder.

[0043] like Figure 4 As shown, in one embodiment, a first inclined surface 313 is provided at the connection between the third mounting groove 113 and the fourth mounting groove 114. The side wall of the clamping assembly 120 is provided with a plurality of first guide grooves 121 in a circular array. A ball bearing 200 is movably installed in the first guide groove 121. The inner wall of the clamping assembly 120 is provided with a plurality of second guide grooves 122. The second guide grooves 122 coincide with the axis of the first guide grooves 121 and are interconnected.

[0044] Specifically, when the transmission cylinder 170 drives the control lever 160 away from the fourth mounting groove 114, one side of the ball 200 abuts against the first inclined surface 313, and the other side of the ball 200 passes through the second guide groove 122 and abuts against the tool holder. When the control lever 160 moves away from the fourth mounting groove 114, the clamping assembly 120 is driven to move synchronously away from the fourth mounting groove 114. Since the side of the ball 200 protrudes from the second guide groove 122, when the clamping assembly 120 moves, one side of the ball 200 abuts against the first inclined surface 313, and the contact force between the clamping assembly 120 and the first inclined surface 313 gradually increases during the movement of the clamping assembly 120 until the other side of the ball 200 protrudes from the second guide groove 122 and is engaged in the annular groove on the tool holder, thus completing the fixation of the tool holder.

[0045] like Figures 5 to 8As shown, in one embodiment, the sidewall of the base 110 is provided with a plurality of transverse mounting slots 115 in a ring array. A sliding block 310 is movably mounted in each transverse mounting slot 115. A first inclined surface 313 is provided on the side of the sliding block 310 facing the ball 200. A third guide groove 311 is provided along the radius of the base 110 at the end of the sliding block 310 facing the ball 200. When the sliding block 310 moves in the axial direction of the base 110, the ball 200 can be replaced with a spare ball 200 in the third guide groove 311.

[0046] Specifically, since the tool holder locking device in this embodiment uses the ball bearing 200 to limit its movement, the ball bearing 200 partially abuts against the recessed engagement point on the outer surface of the tool holder to fix the tool holder. This method may cause damage to the ball bearing 200 after long-term use, thereby affecting the normal rotation of the ball bearing 200 and the stable limiting of the tool holder. Therefore, by opening a third guide groove 311 on the sliding block 310 and setting a spare ball bearing 200 in the third guide groove 311, in the first state, the first inclined surface 313 is opposite to the original ball bearing 200 to limit the original ball bearing 200. In the second state, the third guide groove 311 is opposite to the first guide groove 121, and the original ball bearing 200 can roll out from the first guide groove 121 and move into the third guide groove 311 to replace the spare ball bearing 200 in the third guide groove 311.

[0047] In one embodiment, a first limiting groove 312 is provided at the opening of the third guide groove 311, and a second inclined surface 314 is provided between the first limiting groove 312 and the first inclined surface 313. In the first state, the first inclined surface 313 and the ball 200 are at the same horizontal position. In the second state, the first limiting groove 312 is directly opposite the ball 200.

[0048] Specifically, in the first state, the first inclined surface 313 and the ball 200 are at the same horizontal position, and the distance between the position of the end of the sliding block 310 facing the first guide groove 121 and the first guide groove 121 is less than the diameter of the ball 200. Due to this distance restriction, the ball 200 is always in the first guide groove 121. At this time, when the clamping assembly 120 moves away from the fourth mounting groove 114, the surface of the ball 200 will gradually come into contact with the first inclined surface 313, and finally be abutted by the bottom position of the first inclined surface 313 into the second guide groove 122. At this time, the side of the ball 200 away from the first inclined surface 313 protrudes out of the second guide groove 122 and abuts against the corresponding position on the tool holder. In the second state, the sliding block 310 moves to the lowest position within the transverse mounting groove 115. At this time, the third guide groove 311 is directly opposite the first guide groove 121, and the gap between the second inclined surface 314 and the edge of the first guide groove 121 is greater than the diameter of the ball 200. The ball 200 can move out of the first guide groove 121 and move along the second inclined surface 314 into the third guide groove 311. A guide post 116 is provided on the bottom surface of the transverse mounting groove 115, and a second limiting groove 315 is opened on the bottom surface of the sliding block 310. The guide post 116 is movably inserted into the second limiting groove 315.

[0049] In one embodiment, a rotating tube 320 is rotatably mounted on the end of the sliding block 310 away from the ball 200. Two fourth guide grooves 321 are provided inside the rotating tube 320, and one of the fourth guide grooves 321 coincides with the axis of the third guide groove 311.

[0050] Specifically, two fourth guide grooves 321 are arranged in parallel, and each time the rotating tube 320 rotates 180 degrees, one port of the fourth guide groove 321 will connect with the third guide groove 311. Based on the two fourth guide grooves 321 set in the rotating tube 320, one of them is empty and used to store the replaced ball 200, and the other fourth guide groove 321 stores a spare ball 200. When the ball 200 in the first guide groove 121 is replaced and rolls along the third guide groove 311 into the fourth guide groove 321, the rotating tube 320 is rotated 180 degrees. At this time, the port of the fourth guide groove 321 with the spare ball 200 is connected with the third guide groove 311. Then the spare ball 200 can be pushed into the first guide groove 121, and the sliding block 310 is moved back to the top of the horizontal mounting groove 115 to complete the replacement of the ball 200.

[0051] In one embodiment, the inner wall of the fourth guide groove 321 is provided with a plurality of annular grooves 322 arranged in a linear array, and the plurality of annular grooves 322 are located at the end of the fourth guide groove 321 away from the third guide groove 311. An elastic piece 330 is installed at the end of the fourth guide groove 321 away from the third guide groove 311. The elastic piece 330 is provided with an arc-shaped protruding structure and will deform to protrude to the other side when subjected to force.

[0052] Specifically, by providing multiple annular grooves 322 on the inner wall of the fourth guide groove 321, the ball 200 can be stably positioned on the annular grooves 322, preventing the ball 200 from sliding freely. By positioning the annular grooves 322 at the end of the fourth guide groove 321 away from the third guide groove 311, the ball 200 is always positioned close to the elastic plate 330. When the ball 200 needs to be pushed, pressing the elastic plate 330 causes it to vibrate and deform, pushing the ball 200. The instant the ball 200 receives this push from the elastic plate 330, it moves rapidly along the third guide groove 311 and enters the first guide groove. Preferably, the two elastic plates 330 protrude in opposite directions.

[0053] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. An adaptive tool holder locking device for a tool pre-setting instrument, characterized in that, include: The base has a first mounting slot, a second mounting slot, a third mounting slot and a fourth mounting slot sequentially formed from one end to the other. The clamping assembly has one end located in the first mounting groove and the other end protruding from the third mounting groove and located in the fourth mounting groove, and is used to clamp the tool holder when it retracts into the third mounting groove; The positioning plate is fixed to the bottom of the first mounting groove and is elastically connected to the portion of the clamping assembly located in the second mounting groove by a spring. A tensioning mechanism is used to clamp one end of the clamping assembly located in the first mounting groove; The control lever has one end abutting against the end of the tensioning mechanism away from the clamping assembly; A transmission cylinder is used to drive the control rod to move in the axial direction, thereby adjusting the tension state of the tensioning mechanism; A first inclined surface is provided at the connection between the third mounting slot and the fourth mounting slot. Multiple first guide slots are provided in a circular array on the side wall of the clamping component. A ball is movably installed in the first guide slot. Multiple second guide slots are provided on the inner wall of the clamping component. The second guide slots coincide with the axis of the first guide slots and are interconnected. When the transmission cylinder drives the control rod away from the fourth mounting groove, one side of the ball abuts against the first inclined surface, and the other side of the ball passes through the second guide groove and abuts against the tool holder; The base sidewall has multiple transverse mounting slots arranged in a ring array. A sliding block is movably installed in each transverse mounting slot. The first inclined surface is provided on the side of the sliding block facing the ball. A third guide groove is provided along the radius of the base at the end of the sliding block facing the ball. When the sliding block moves along the axial direction of the base, the ball can be replaced with a spare ball in the third guide groove.

2. The adaptive tool holder locking device for a tool pre-setting instrument according to claim 1, characterized in that, A first limiting groove is provided at the opening of the third guide groove, and a second inclined surface is provided between the first limiting groove and the first inclined surface. In the first state, the first inclined surface and the ball are at the same horizontal position. In the second state, the first limiting groove is directly opposite the ball.

3. The adaptive tool holder locking device for a tool pre-setting instrument according to claim 2, characterized in that, The bottom surface of the transverse mounting groove is provided with a guide post, and the bottom surface of the sliding block is provided with a second limiting groove, and the guide post is movably inserted into the second limiting groove.

4. The adaptive tool holder locking device for a tool pre-setting instrument according to claim 3, characterized in that, The sliding block is rotatably mounted with a rotating tube at the end away from the ball. The rotating tube is provided with two fourth guide grooves, and one of the fourth guide grooves coincides with the axis of the third guide groove.

5. The adaptive tool holder locking device for a tool pre-setting instrument according to claim 4, characterized in that, The inner wall of the fourth guide groove is provided with a plurality of annular grooves arranged in a linear array, and the plurality of annular grooves are located at the end of the fourth guide groove away from the third guide groove.

6. The adaptive tool holder locking device for a tool pre-setting instrument according to claim 5, characterized in that, An elastic sheet is installed at the end of the fourth guide groove away from the third guide groove. The elastic sheet has an arc-shaped protruding structure and will deform to protrude to the other side when subjected to force.

7. The adaptive tool holder locking device for a tool pre-setting instrument according to claim 6, characterized in that, The two elastic sheets protrude in opposite directions.

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