Numerical control tool rest for machining of numerical control machine tool

Abstract

The numerical control tool rest comprises a fixing seat and a tool rest body, a plurality of tool containing grooves with outward openings are formed in the middle of the tool rest body in the circumferential direction, an upper blocking part is formed in the position, above each tool containing groove, of the tool rest body, and fixing bolts are arranged on the upper blocking parts in a penetrating mode. The tool rest is characterized in that a notch is formed in the position, located at the joint of every two adjacent lower blocking parts, of the tool rest, an inclined table is formed on each lower blocking part, a front-back through groove is formed in the top of each inclined table, a sliding block is arranged on each lower blocking part in a sliding mode, and the sliding blocks are arranged on the lower blocking parts in a sliding mode. An inclined sliding face matched with the inclined table is formed on the sliding block, a penetrating hole is formed in the sliding block, a bolt is arranged in the penetrating hole in a penetrating mode, and the outer end of the bolt penetrates through the groove and then is screwed with a nut. According to the numerical control tool rest for machining of the numerical control machine tool, center height adjustment in the tool installation process is simplified, and the numerical control tool rest is suitable for a rotary tool rest structure.

Description

Technical Field

[0001] The utility model relates to a numerical control tool rest for numerical control machine tool processing. Background Art

[0002] A CNC machine tool is an automated machine tool equipped with a program control system. The tool rest on a CNC machine tool is an important component for placing cutting tools. The performance and structure of the tool rest often directly affect the cutting performance and efficiency of the machine tool and reflect the design and manufacturing technology level of the machine tool. According to the structure of the tool rest, it can be divided into a row tool rest and a rotary tool rest. At present, whether it is a row tool rest or a rotary tool rest, the height adjustment method for the CNC tool handle generally adopts adding a shim to the lower part of the tool handle, or adding a pushable wedge plate to the bottom of the tool handle. These height adjustment methods are inconvenient to adjust and are not stable enough.

[0003] To this end, the existing Chinese invention patent with publication number CN116851793A discloses "A CNC lathe tool holder with freely adjustable tool center height". When in use, the tool holder is slidably connected to the slide rail on the tool seat of the CNC lathe through the T-shaped slider 15. When the overall position of the tool holder needs to be adjusted, it is only necessary to loosen the countersunk fastening bolt 1 4 and the countersunk fastening bolt 2 6 to slide the tool holder along the slide rail to the corresponding position, and then the countersunk fastening bolt 1 4 and the countersunk fastening bolt 2 6 are tightened. When the center height of the tool needs to be adjusted, the clamping bolt 8 is screwed out, and the fastening screw 16 is loosened, and the cylinder 7 is rotated to make it rise and fall to the desired position relative to the connecting seat 1, and the fastening screw 16 is tightened with a screwdriver, and the clamping bolt 8 is screwed into the upper threaded hole 2 13 and tightened. However, the tool center height adjustment method of the invention is only applicable to a tool holder with one tool, and cannot be applied to a rotary tool holder with multiple tools. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a CNC tool rest for CNC machine tool processing in view of the current status of the prior art, simplifying the center height adjustment during the tool installation process and making it suitable for a rotary tool rest structure.

[0005] The technical solution adopted by the utility model to solve the above-mentioned technical problems is: a CNC tool holder for CNC machine tool processing, comprising a fixed seat and a tool holder, a plurality of tool mounting grooves opening outward are circumferentially opened in the middle part of the tool holder, an upper stop is formed on the tool holder above each tool mounting groove, a fixing bolt is penetrated through the upper stop, and a lower stop is formed on the tool holder below each tool mounting groove, characterized in that: a notch is formed at the intersection between two adjacent lower stop portions on the tool holder, an inclined platform is formed on the lower stop, a groove penetrating from front to back is opened on the top of the inclined platform, a slider is slidably arranged on the lower stop, an inclined sliding surface matching the inclined platform is formed on the slider, a through hole is opened on the slider, a bolt is penetrated in the through hole, and a nut is screwed on the outer end of the bolt after passing through the groove.

[0006] As an improvement, a platform portion is formed on the lower stop portion at the root connection of the ramp, and a supporting portion for abutting against the platform portion is formed on the lower side wall of the slider. When the supporting portion and the platform portion are in contact, the upper side surface of the slider is flush with the upper side surface of the ramp.

[0007] As a further improvement, a seating groove for seating the bolt head is formed on the outer wall of the sliding block, a spring abutting against the bolt head is arranged in the seating groove, and the bolt passes through the spring.

[0008] As a further improvement, a limiting portion for locking into the groove on the inclined surface of the ramp is formed on the sliding surface of the slider.

[0009] A further improvement is that a cooling hole is opened in the bolt, the axis of the cooling hole coincides with the central axis of the bolt, a first connecting head is provided on the screw portion of the bolt, the first connecting head is connected to a connecting pipe, a second connecting head is provided at the bolt head of the bolt, the second connecting head is connected to a cooling pipe for cooling the tool head.

[0010] As a further improvement, a top sealing plate for sealing the top of the groove is connected to the top of the ramp by screws.

[0011] As a further improvement, a side baffle is connected to the outer side wall of the inclined platform by screws, and a sliding block is slidably arranged between the side baffle and the tool holder body.

[0012] Further improvement, the ramp is located in the middle of the lower baffle, the cross-section of the ramp is an isosceles trapezoidal structure, inclined surfaces are formed on both sides of the ramp, there are two sliders, which are slidably set on the inclined surfaces on both sides of the ramp, the bolt passes through the two sliders and the ramp, the head of the bolt abuts against one of the sliders, and the nut on the bolt abuts against the other slider.

[0013] As a further improvement, a cooling nozzle is provided on the tool holder at the notch, and a pipe body of the cooling nozzle is partially buried in the tool holder.

[0014] As a further improvement, a square block is sleeved on the bolt, and the square block is limitedly installed in the groove of the ramp.

[0015] Compared with the prior art, the advantages of the present invention are as follows: on the basis of the traditional tool holder structure, the present invention improves the structure of the lower baffle, designs the lower baffle into an inclined platform structure, and adds a slider structure with the same inclined surface, and uses bolts and nuts to limit and fix the slider. During the adjustment of the tool center height, loosen the nut, the top surface of the slider is flush with the top surface of the lower baffle, place the tool in the tool mounting groove, rotate the nut, the distance between the nut and the bolt head is reduced, and the slider slowly moves up to achieve the adjustment of the tool center height. Thereafter, tighten the fixing bolt on the upper baffle to fix the tool handle. During the process of the tool handle being tightened, since the distance between the bolt head and the nut remains unchanged, the slider does not move downward but is in a fixed state, thereby realizing the installation process of the entire tool. The tool center height adjustment structure of the present invention is fully applicable to the rotary tool holder structure, and provides a good solution for the tool center height adjustment in the rotary tool holder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the CNC tool holder used for CNC machine tool processing in Example 1 of the utility model;

[0017] Figure 2 It is a cross-sectional view of the lower baffle in Embodiment 1 of the present utility model;

[0018] Figure 3 yes Figure 2 Schematic diagram of the structure in another state;

[0019] Figure 4 is a cross-sectional view of a bolt in Embodiment 1 of the present utility model;

[0020] Figure 5 It is a structural schematic diagram of the slider in Embodiment 1 of the utility model;

[0021] Figure 6 yes Figure 5 A schematic diagram of the structure in another direction;

[0022] Figure 7 It is another structural schematic diagram of the CNC tool rest in Embodiment 1 of the utility model;

[0023] Figure 8 It is a structural schematic diagram of the lower baffle in Example 2 of the utility model. DETAILED DESCRIPTION

[0024] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] Example 1

[0026] like Figures 1 to 7As shown, the CNC tool holder for CNC machine tool processing in this embodiment includes a fixed seat 1, a tool holder 2, a fixing bolt 6, a slide block 3 and a cooling pipe.

[0027] Among them, a plurality of outwardly opening tool mounting grooves 22 are circumferentially provided in the middle part of the tool holder 2, an upper stopper 21 is formed on the tool holder 2 above each tool mounting groove 22, a fixing bolt 23 is penetrated through the upper stopper 21, a lower stopper 4 is formed on the tool holder 2 below each tool mounting groove 22, a notch 24 is formed at the intersection of two adjacent lower stoppers 4 on the tool holder 2, an inclined platform 41 is formed on the lower stopper 4, a groove 411 which passes through the top of the inclined platform 41 is provided, a slider 3 is slidably provided on the lower stopper 4, an inclined sliding surface 32 which matches the inclined platform 41 is formed on the slider 3, a through hole 31 is provided on the slider 3, a bolt 6 is penetrated in the through hole 31, and the outer end of the bolt 6 passes through the groove 411 and is screwed with a nut 5.

[0028] Preferably, in order to make the slider 3 in a stationary state in the initial state, a platform portion 42 is formed on the lower stopper 4 at the root connection of the ramp 41, and a butt portion for butting against the platform portion 42 is formed on the lower side wall of the slider 3. When the butt portion and the platform portion 42 are in contact, the upper side of the slider 3 is flush with the upper side of the ramp 41. At the same time, in order to improve the aesthetics of the installation of the bolt 6, a seating groove 311 for the head of the bolt 6 to sit is formed on the outer side wall of the slider 3. A spring that butts against the head of the bolt 6 is arranged in the seating groove 311. The bolt 6 passes through the spring. At the same time, the spring can press the slider 3 and the ramp 41 against each other, and separate the sliding surface of the slider 3 and the inclined surface of the ramp 41.

[0029] Furthermore, since the tool mounting groove 22 of the tool holder 2 is open outward, in order to prevent the slider 3 from deflecting during the sliding process and to improve the sliding guiding property of the slider 3, a variety of solutions are designed in the embodiment of the utility model. The first is that a limiting portion 33 for being inserted into the groove 411 of the inclined surface of the ramp 41 is formed on the sliding surface 32 of the slider 3. When in use, the limiting portion 33 of the slider 3 is inserted into the groove 411 on the inclined surface of the ramp 41, and the limiting portion 33 provides a guiding effect for the sliding of the slider 3. The second structure is as follows: Figure 7 As shown, a side baffle 7 is connected to the outer wall of the inclined platform 41 by screws, and the slider 3 is slidably arranged between the side baffle 7 and the tool holder 2 body, and the side baffle 7 plays a blocking and guiding role on the side of the slider 3. The third structure is as follows: Figure 4 As shown, a square block 62 is sleeved on the bolt 6, and the square block 62 is limitedly installed in the groove 411 of the inclined platform 41. It is also possible to combine one or two of the above structures to improve the sliding guide function of the slider 3 at the same time.

[0030] Furthermore, in order to prevent the bolt 6 from leaving the inclined platform 41 during the upward movement, a top sealing plate 8 for sealing the top of the groove 411 is connected to the top of the inclined platform 41 by screws.

[0031] In addition, since a large amount of heat is generated during tool cutting, in order to facilitate the heat dissipation of the tool. In the embodiment of the utility model, a cooling hole 61 is provided in the bolt 6, and the axis of the cooling hole 61 coincides with the central axis of the bolt 6. A first connector is provided on the screw portion of the bolt 6, and the first connector is connected to a connecting pipe. A second connector is provided at the bolt head of the bolt 6, and the second connector is connected to a cooling pipe for cooling the tool head. Since the bolt head in the embodiment of the utility model is very close to the tool head during the tool cutting process, by providing a cooling hole 61 inside the bolt 6, the coolant can be well transported to the tool cutting part. Alternatively, a cooling nozzle may be provided at the notch 24 on the tool holder 2, and the tube body of the cooling nozzle may be buried in the tool holder 2.

[0032] Example 2

[0033] In Example 1, the inclined platform 41 has only one inclined surface. As the slider 3 moves upward, the slider 3 can only press one end of the handle, while the other end of the handle will be suspended for a longer length. Example 2 is to achieve force on both ends of the handle and improve the uniformity of the force on the handle. To this end, the technical feature of Example 2 compared to Example 1 is that, in this embodiment, the inclined platform 41 has two inclined surfaces and is designed to use two sliders 3. Specifically, see Figure 8 As shown, the inclined platform 41 is located in the middle of the lower stopper, and the cross section of the inclined platform 41 is an isosceles trapezoidal structure. Inclined surfaces are formed on both sides of the inclined platform 41. The slider 3 has two sliders, which are respectively slidably arranged on the inclined surfaces on both sides of the inclined platform 41. The bolt 6 passes through the two sliders 3 and the inclined platform 41. The head of the bolt 6 abuts against one of the sliders 3, and the nut 5 on the bolt 6 abuts against the other slider 3. In Example 2, two sliders 3 are used to support the tool handle at the same time, thereby improving the support effect of the tool handle and ensuring the stability of the tool handle.

[0034] In summary, based on the structure of the traditional tool holder 2, the utility model improves the structure of the lower stopper 4, designs the lower stopper 4 into an inclined platform structure, and adds a slider structure with the same inclined surface, and uses the bolt 6 and the nut 5 to limit and fix the slider 3. During the adjustment of the tool center height, loosen the nut 5, the top surface of the slider 3 is flush with the top surface of the lower stopper 4, place the tool in the tool mounting groove 22, rotate the nut 5, the distance between the nut 5 and the head of the bolt 6 is reduced, and the slider 3 slowly moves up to achieve the adjustment of the tool center height. Thereafter, tighten the fixing bolt 23 on the upper stopper 21 to fix the tool handle. During the process of the tool handle being pressed, since the distance between the head of the bolt 6 and the nut 5 remains unchanged, the slider 3 will not move downward but is in a fixed state, thereby realizing the installation process of the entire tool. The tool center height adjustment structure of the utility model is completely applicable to the rotary tool holder structure, and provides a good solution for the tool center height adjustment in the rotary tool holder.

Claims

1. A CNC tool holder for CNC machine tool processing, comprising a fixed seat (1) and a tool holder (2), wherein a plurality of tool mounting grooves (22) opening outward are circumferentially formed in the middle of the tool holder (2), an upper stopper (21) is formed on the tool holder (2) above each tool mounting groove (22), a fixing bolt (23) is penetrated through the upper stopper (21), and a lower stopper (4) is formed on the tool holder (2) below each tool mounting groove (22), characterized in that: A notch (24) is formed on the tool holder (2) at the junction between two adjacent lower stoppers (4), a ramp (41) is formed on the lower stopper (4), a groove (411) penetrating from front to back is formed on the top of the ramp (41), a slider (3) is slidably arranged on the lower stopper (4), an inclined sliding surface (32) matching the ramp (41) is formed on the slider (3), a through hole (31) is formed on the slider (3), a bolt (6) is inserted into the through hole (31), and the outer end of the bolt (6) passes through the groove (411) and is screwed with a nut (5).

2. The CNC tool rest for CNC machine tool processing according to claim 1, characterized in that: A platform portion (42) is formed on the lower stop portion (4) at the root connection of the inclined platform (41), and a supporting portion for abutting against the platform portion (42) is formed on the lower side wall of the slider (3). When the supporting portion and the platform portion (42) are in contact, the upper side surface of the slider (3) is flush with the upper side surface of the inclined platform (41).

3. The CNC tool rest for CNC machine tool processing according to claim 1, characterized in that: A seating groove (311) for seating the head of the bolt (6) is formed on the outer side wall of the sliding block (3), a spring abutting against the head of the bolt (6) is arranged in the seating groove (311), and the bolt (6) passes through the spring.

4. The CNC tool rest for CNC machine tool processing according to claim 3, characterized in that: A limiting portion (33) for being inserted into a groove (411) on the inclined surface of the inclined platform (41) is formed on the sliding surface (32) of the sliding block (3).

5. The CNC tool rest for CNC machine tool processing according to claim 1, characterized in that: A cooling hole (61) is provided in the bolt (6), the axis of the cooling hole (61) coincides with the central axis of the bolt (6), a first connecting head is provided on the screw portion of the bolt (6), the first connecting head is connected to a connecting pipe, and a second connecting head is provided at the bolt head of the bolt (6), the second connecting head is connected to a cooling pipe for cooling the tool head.

6. The CNC tool rest for CNC machine tool processing according to claim 2, characterized in that: The top of the inclined platform (41) is connected to a top sealing plate (8) via screws for sealing the top of the groove (411).

7. The CNC tool rest for CNC machine tool processing according to claim 6, characterized in that: The outer side wall of the inclined platform (41) is connected to a side baffle (7) via screws, and the slide block (3) is slidably arranged between the side baffle (7) and the tool holder (2) body.

8. The CNC tool rest for CNC machine tool processing according to claim 1, characterized in that: The inclined platform (41) is located in the middle of the lower stopper (4). The cross section of the inclined platform (41) is an isosceles trapezoidal structure. Inclined surfaces are formed on both sides of the inclined platform (41). The sliders (3) have two sliders, which are respectively slidably arranged on the inclined surfaces on both sides of the inclined platform (41). The bolt (6) passes through the two sliders (3) and the inclined platform (41). The head of the bolt (6) abuts against one of the sliders (3), and the nut (5) on the bolt (6) abuts against the other slider (3).

9. The CNC tool rest for CNC machine tool processing according to claim 1, characterized in that: A cooling nozzle is provided on the tool holder (2) at the notch (24), and a pipe body portion of the cooling nozzle is buried in the tool holder (2).

10. The CNC tool rest for CNC machine tool processing according to claim 5, characterized in that: The bolt (6) is sleeved with a square block (62), and the square block (62) is limitedly installed in the groove (411) of the inclined platform (41).

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