A center hole fixture for vertical lathe

Abstract

The present invention relates to the field of processing technology, and in particular to a center hole clamp for a vertical lathe. The present invention provides a center hole clamp for a vertical lathe, comprising: a self-centering clamping mechanism, the self-centering clamping mechanism is arranged on a base, the self-centering clamping mechanism comprises an adjusting part and a clamping part, the adjusting part adjusts the clamping part to extend in or out radially along the self-centering clamping mechanism; a plurality of clamping mechanisms, the clamping mechanisms are arranged on the base at intervals around the self-centering clamping mechanism, and the positions of the clamping mechanisms can be adjusted radially; when the workpiece to be processed is in a clamped state, the clamping part abuts against the inner side of the workpiece to be processed, and the clamping mechanism abuts against the top of the workpiece to be processed. The purpose of the present invention is to provide a center hole clamp for a vertical lathe, which has self-centering and product versatility, reducing a large amount of economic costs, as well as the time and manpower consumed when replacing the clamp.

Description

Technical Field

[0001] The invention relates to the technical field of processing, in particular to a center hole fixture of a vertical lathe. Background Art

[0002] The manual four-jaw self-centering chuck in the prior art is called the manual four-jaw self-centering chuck for machine tools. It consists of a chuck body, four small bevel teeth, and a pair of claws. The four small bevel teeth mesh with the coil wire, and the back of the coil wire has a flat thread structure, and the claws are equally installed on the flat thread. When the small bevel teeth are turned with a wrench, the coil wire rotates, and the flat thread on its back causes the claws to move toward or withdraw from the center at the same time. Because the pitch of the flat rectangular thread on the coil wire is equal, the four claws move the same distance, which has the function of automatic centering.

[0003] The four-jaw chuck currently in use is prone to impurities such as cast iron ash, which causes the screw used for moving and locking the chuck jaws to get stuck, resulting in the scrapping of the entire four-jaw chuck. For example, if the processed product is HT250 gray cast iron parts, cast iron ash and fine granular objects are easily generated during processing. When these cast iron ash and fine granular objects enter the four-jaw chuck, it is easy to cause the screw used for moving and locking the chuck jaws to get stuck. Due to the stuck jaws, a set of manual four-jaw self-centering chucks needs to be replaced every 1 to 2 months on average. In view of this phenomenon and considering the labor and cost of each chuck replacement, it is necessary to design a completely enclosed chuck to prevent impurities such as cast iron ash from entering it and avoid the chuck jaws from getting stuck. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a center hole clamp for a vertical lathe, which has self-centering and product versatility, thereby reducing a large amount of economic costs, as well as the time and manpower consumed when replacing the clamp.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] The present invention provides a center hole clamp for a vertical lathe, comprising: a self-centering clamping mechanism, which is arranged on a base, and comprises an adjusting portion and a clamping portion, and the adjusting portion adjusts the clamping portion to extend in or out radially along the self-centering clamping mechanism; a plurality of clamping mechanisms, which are arranged on the base at intervals around the self-centering clamping mechanism, and the positions of the clamping mechanisms are radially adjustable and vertically adjustable; when a workpiece to be processed is in a clamped state, the clamping portion abuts against the inner side surface of the workpiece to be processed, and the clamping mechanism presses against the end surface of the workpiece to be processed.

[0007] In a specific embodiment, the adjusting portion includes an adjusting rod and an adjusting piece threadedly engaged with the adjusting rod, and the clamping portion includes a sliding block portion engaged with the inclined surface of the adjusting piece; when the adjusting rod is adjusted to rotate, the adjusting piece rotates in the opposite direction relative to the adjusting rod and rotates upward or downward, and when the adjusting piece moves upward or downward, it drives the sliding block portion to extend in or out radially along the self-centering clamping mechanism.

[0008] In a specific embodiment, the adjusting member is provided with a T-shaped slot, the sliding block is provided with a T-shaped portion accommodated in the T-shaped slot, the T-shaped portion has a first inclined surface and a second inclined surface, the T-shaped slot is provided with a third inclined surface matching with the first inclined surface and a fourth inclined surface matching with the second inclined surface, wherein the first inclined surface and the second inclined surface are located on opposite sides of the T-shaped portion, and the third inclined surface and the fourth inclined surface are located on two opposite side surfaces of the T-shaped slot.

[0009] In a specific embodiment, the self-centering clamping mechanism also includes a shell, the shell includes a top cover, a bottom cover, and a side surface, the adjusting rod passes through the top cover of the shell and is connected to the bottom cover of the shell, the adjusting member is located inside the shell, and the sliding block extends through the side surface of the shell and extends into or out perpendicular to the shell.

[0010] In a specific embodiment, a sealing groove is provided on the top surface of the top cover of the shell around the circumference of the adjusting rod, and a dustproof seal is accommodated in the sealing groove. The inner side of the dustproof seal presses against the side wall of the adjusting rod, and the outer side of the dustproof seal presses against the side wall of the sealing groove.

[0011] In a specific embodiment, the adjusting rod includes a first part connected to the top cover, a second part connected to the bottom cover, and a third part located between the first part and the second part, wherein the diameter of the third part is larger than that of the first part and the second part; a first axial limit block is provided at the joint between the top cover and the third part, and a second axial limit block is provided at the joint between the bottom cover and the second part.

[0012] In a specific embodiment, the clamping portion further includes a sliding base connected to the base, and a claw slidably connected to the sliding base, wherein the claw is connected to the sliding block portion.

[0013] In a specific embodiment, each of the clamping mechanisms includes a pressing plate portion for pressing the top of the workpiece to be processed, and a slide groove cooperating with the pressing plate portion is provided on the base, and the pressing plate portion slides relative to the base along the slide groove.

[0014] In a specific embodiment, it is characterized in that the pressing plate portion includes a pressing portion which can be adjusted up and down.

[0015] In a specific embodiment, each of the clamping mechanisms further includes a supporting portion for supporting the bottom of the workpiece to be processed, and the base is provided with a plurality of groups of connecting holes cooperating with the supporting portion, and the plurality of groups of connecting holes are distributed radially.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The center hole clamp of the vertical lathe of the present invention automatically centers the workpiece to be processed and positions the inside of the workpiece to be processed through a self-centering clamping mechanism, so that workpieces to be processed with different inner diameters can be used; by adjusting the position of the clamping mechanism relative to the self-centering clamping mechanism, it can adapt to workpieces to be processed with different outer diameters. Therefore, the center hole clamp of the vertical lathe has self-centering and product versatility, which reduces a lot of economic costs, as well as the time and manpower consumed when replacing the clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the center hole fixture of the vertical lathe of the present invention;

[0019] Figure 2 It is a partial cross-sectional structural schematic diagram of the center hole fixture of the vertical lathe of the present invention;

[0020] Figure 3 It is a partial cross-sectional structural schematic diagram of the self-centering clamping mechanism of the center hole clamp of the vertical lathe of the present invention;

[0021] Figure 4 It is a partial structural schematic diagram of the self-centering clamping mechanism of the center hole clamp of the vertical lathe of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the slider portion of the center hole fixture of the vertical lathe of the present invention;

[0023] Figure 6 It is a structural schematic diagram of the center hole clamp adjusting member of the vertical lathe of the present invention.

[0024] In the figure: 10, self-centering clamping mechanism; 11, adjusting portion; 111, adjusting rod; 1111, first portion; 1112, second portion; 1113, third portion; 112, adjusting member; 1121, T-shaped slot; 1122, third inclined surface; 1123, fourth inclined surface; 12, clamping portion; 121, slider portion; 1211, T-shaped portion; 1212, first inclined surface; 1213, second inclined surface ; 122, sliding base; 1221, limit block; 123, claw; 13, shell; 131, top cover; 132, bottom cover; 133, side; 14, dustproof seal; 15, first axial limit block; 16, second axial limit block; 20, clamping mechanism; 21, pressure plate part; 22, pressing part; 23, supporting part; 30, base; 31, slide groove; 32, limit block; 33 connecting hole. DETAILED DESCRIPTION

[0025] The present invention will be described in more detail below in conjunction with the accompanying drawings. It should be noted that the following description of the present invention with reference to the accompanying drawings is only illustrative and not restrictive. The various embodiments can be combined with each other to form other embodiments not shown in the following description.

[0026] The present invention provides a vertical lathe center hole fixture, referring to Figure 1 and Figure 2 The center hole clamp of the vertical lathe includes a self-centering clamping mechanism 10 and a plurality of clamping mechanisms 20. The self-centering clamping mechanism 10 is arranged on a base 30, and the self-centering clamping mechanism 10 includes an adjusting portion 11 and a clamping portion 12. The adjusting portion 11 adjusts the clamping portion 12 to extend in or out along the radial direction of the self-centering clamping mechanism 10 (the radial direction in this article refers to the radial direction of the self-centering clamping mechanism) to achieve automatic centering and clamping of the workpiece to be processed, and can adapt to workpieces of different diameters; the clamping mechanisms 20 are arranged on the base 30 at intervals around the self-centering clamping mechanism 10, and the position of the clamping mechanisms 20 can be adjusted radially to adapt to workpieces of different diameters, and can be adjusted vertically to adapt to workpieces of different heights and thicknesses. workpiece to be processed; when the workpiece to be processed is in a clamped state, the clamping portion 12 abuts against the inner side of the workpiece to be processed, and the pressing mechanism 20 presses against the end face of the workpiece to be processed; the extension and retraction of the clamping portion 12 can be adjusted by adjusting the adjusting portion 11 of the self-centering clamping mechanism, so as to adapt to workpieces to be processed with different inner diameters and different sizes; by radially adjusting the position of the pressing mechanism 20 relative to the self-centering clamping mechanism 10, that is, adjusting the pressing mechanism 20 to be close to or away from the self-centering clamping mechanism 10 to adapt to workpieces to be processed with different outer diameters and different sizes, the versatility of the clamp is achieved, and the economic cost, as well as the working hours and manpower consumed in replacing the clamp are reduced.

[0027] In a specific embodiment, reference Figure 2 , Figure 3and Figure 4 The adjusting part 11 includes an adjusting rod 111 and an adjusting member 112 threadedly matched with the adjusting rod 111, and the clamping part 12 includes a slider 121 threadedly matched with the inclined surface of the adjusting member 112; when the adjusting rod 111 rotates, the adjusting member 112 rotates in the opposite direction relative to the adjusting rod 111 and rotates upward or downward, and when the adjusting member 112 moves upward or downward, the slider 121 is driven to extend in or out along the radial direction of the self-centering clamping mechanism 10 under the action of the inclined surface. Specifically, the adjusting rod 111 can be a component such as a screw or a lead screw that can be threadedly matched with the adjusting member.

[0028] In a specific embodiment, reference Figure 5 and Figure 6 A T-shaped slot 1121 is provided on the adjusting member 112, and a T-shaped portion 1211 accommodated in the T-shaped slot 1121 is provided at one end of the sliding block portion 121, the T-shaped portion 1211 has a first inclined surface 1212 and a second inclined surface 1213, and a third inclined surface 1122 cooperating with the first inclined surface 1212 and a fourth inclined surface 1123 cooperating with the second inclined surface 1213 are provided on the T-shaped slot 1121, wherein the first inclined surface 1212 and the second inclined surface 1213 are located on opposite sides of the T-shaped portion 1211, and the third inclined surface 1122 and the fourth inclined surface 1123 are located on two opposite sides of the T-shaped slot 1121. That is, when the T-shaped portion 1211 of the slider portion 121 is accommodated in the T-shaped slot 1121, the first inclined surface 1212 of the T-shaped portion 1211 cooperates with the third inclined surface 1122 of the T-shaped slot 1121, and the second inclined surface 1213 of the T-shaped portion 1211 cooperates with the fourth inclined surface 1123 of the T-shaped slot 1121. When the adjusting rod 111 drives the adjusting member 112 to move upward or downward, the third inclined surface 1122 exerts a force on the first inclined surface 1212 or the fourth inclined surface 1123 exerts a force on the second inclined surface 1213, so that the slider portion 121 extends in or out.

[0029] It should be understood that when the adjusting member 112 moves upward, the third inclined surface 1122 of the T-slot 1121 applies a force to the first inclined surface 1212 of the T-shaped portion 1211 or the fourth inclined surface 1123 of the T-slot 1121 applies a force to the second inclined surface 1213 of the T-shaped portion 1211, driving the slider portion 121 to extend in or extend out; or when the adjusting member 112 moves downward, the third inclined surface 1122 of the T-slot 1121 applies a force to the first inclined surface 1212 of the T-shaped portion 1211 or the fourth inclined surface 1123 of the T-slot 1121 applies a force to the second inclined surface 1213 of the T-shaped portion 1211, driving the slider portion 121 to extend in or extend out. The specific acting inclined surfaces of the T-slot 1121 and the T-shaped portion 1211, and thus driving the slider portion 121 to extend in or extend out, are determined according to the orientation of the inclined surfaces in the specific design. For example, referring to Figure 5 and Figure 6, the adjusting rod 111 rotates and moves upward, driving the adjusting member 112 to rotate in the opposite direction and move downward, and the fourth inclined surface 1123 of the T-shaped slot 1121 applies a force to the second inclined surface 1213 of the T-shaped portion 1211, so that the sliding block portion 121 extends inward and moves; when the adjusting rod 111 rotates and moves downward, driving the adjusting member 112 to rotate in the opposite direction and move upward, the third inclined surface 1122 of the T-shaped slot 1121 applies a force to the first inclined surface 1212 of the T-shaped portion 1211, so that the sliding block portion 121 extends outward and moves.

[0030] In a specific embodiment, the self-centering clamping mechanism 10 further includes a housing 13, the housing 13 includes a top cover 131, a bottom cover 132, and a side 133, the adjustment rod 111 passes through the top cover 131 of the housing 13 and is connected to the bottom cover 132 of the housing 13, the adjustment member 112 is located inside the housing 13 and is threadedly connected to the adjustment rod 111, and the slider portion 121 extends through the side of the housing 13 and extends into or out of the housing 13 perpendicularly. Specifically, a guide groove is provided on the side of the housing 13, and the slider portion 121 extends through the guide groove and can extend into or out of the guide groove relative to the housing 13. Optionally, the guide groove can be square, T-shaped, etc.

[0031] In a specific embodiment, a sealing groove is provided on the top surface of the top cover 131 of the shell 13 around the circumference of the adjusting rod 111, and a dustproof seal 14 is accommodated in the sealing groove. The inner side of the dustproof seal 14 presses against the side wall of the adjusting rod 111, and the outer side of the dustproof seal 14 presses against the side wall of the sealing groove, thereby effectively preventing cast iron ash from entering the self-centering clamping mechanism 10 when the workpiece is being processed, thereby affecting the service life.

[0032] In a specific embodiment, the adjusting rod 111 includes a first part 1111 connected to the top cover 131, a second part 1112 connected to the bottom cover 132, and a third part 1113 located between the first part 1111 and the second part 1112, that is, the third part 1113 is located inside the shell 13, and the dustproof seal 14 is sleeved on the first part 1111, wherein the diameter of the third part 1113 is larger than the first part 1111 and the second part 1112; a first axial limit block 15 is provided at the joint between the top cover 131 and the third part 1113, and a second axial limit block 16 is provided at the joint between the bottom cover 132 and the second part 1112, and the first axial limit block 15 and the second axial limit block 16 can effectively limit the displacement stroke of the adjusting rod 111.

[0033] In a specific embodiment, the clamping portion 12 further includes a sliding base 122 slidably connected to the base 30, and a claw 123 connected to the sliding base 122, wherein the claw 123 is connected to the slider portion 121. It should be understood that the sliding base is connected to the base in a sliding groove-guide rail manner to achieve radial sliding of the claw 123 relative to the base 30, thereby adapting to workpieces to be processed with different inner diameters, and the claw 123 can ensure that the claw 123 is smoothly extended or extended (moved forward and backward) as the sliding base 122 slides along the slide rail on the base, that is, it has a guiding effect.

[0034] In another embodiment, the sliding base is fixedly connected to the base, and the sliding base 122 is connected to the claw 123 by a slide groove-guide rail, so that the claw can slide radially on the sliding base 122, thereby realizing radial sliding of the claw 123 relative to the base 30, thereby adapting to workpieces with different inner diameters, and the sliding of the claw 123 along the sliding base 122 can ensure that the claw 123 can be smoothly extended or extended (moved forward and backward), that is, it has a guiding effect.

[0035] In a specific embodiment, a limit block 1221 is further provided at the end of the sliding base 122 to prevent the claw from excessive displacement. Optionally, an adjustment pad is further provided between the claw 123 and the sliding base 122 .

[0036] In a specific embodiment, each clamping mechanism 20 includes a pressing plate portion 21 for pressing the top of the workpiece to be processed, and a slide groove 31 is provided on the base 30 to cooperate with the pressing plate portion 21. The pressing plate portion 21 slides radially relative to the base 30 along the slide groove 31, thereby adapting to the workpieces to be processed with different outer diameters. In a specific embodiment, a limit stopper 32 is provided at the end of the slide groove 31.

[0037] In a specific embodiment, the pressing plate portion 21 includes a pressing portion 22 that can be adjusted up and down, and the pressing portion 22 can be adjusted up and down so that the pressing plate portion can clamp the workpieces to be processed at different heights. The pressing portion 22 can be a component that can be adjusted up and down, such as a screw.

[0038] In a specific embodiment, each clamping mechanism 20 also includes a support portion 23 for supporting the bottom of the workpiece to be processed, and a plurality of groups of connection holes 33 cooperating with the support portion 23 are provided on the base 30, and the plurality of groups of connection holes 33 are distributed radially. It should be understood that when clamping the workpiece to be processed, the support portion 23 and the pressure plate portion 21 respectively abut against the bottom and top of the workpiece to be processed, and the position of the support portion can be adjusted according to the outer diameter of the workpiece to be processed, that is, the connection between the support portion 23 and the corresponding connection hole 33 on the base 30 is selected. In addition, the support portion of the corresponding height can also be selected according to the height of the workpiece to be processed. In a specific embodiment, the plurality of groups of connection holes 33 are distributed along the slide groove, that is, distributed on both sides of the slide groove 31.

[0039] In a specific embodiment, each clamping mechanism 20 includes a pressure plate portion 21 for pressing the top of the workpiece to be processed, a pressure portion 22 that can be adjusted vertically up and down, and a support portion 23 for supporting the bottom of the workpiece to be processed. The base 30 is provided with a plurality of connection holes 33 that cooperate with the support portion 23. The plurality of connection holes 33 are distributed radially. The base 30 is provided with a slide groove 31 that cooperates with the pressure plate portion 21. The pressure plate portion 21 slides radially relative to the base 30 along the slide groove 31, so as to adapt to the workpieces to be processed of different outer diameters. Through the combined action of the support portion and the pressure portion 22 that can be adjusted up and down, the pressure plate portion can clamp the workpieces to be processed of different heights.

[0040] The center hole clamp of the vertical lathe of the present invention can automatically center the workpiece to be processed and position the inside of the workpiece to be processed by a self-centering clamping mechanism, so that workpieces with different inner diameters can be used; by adjusting the position of the clamping mechanism relative to the self-centering clamping mechanism, it can adapt to workpieces with different outer diameters, and by adjusting the pressing part of the clamping mechanism that presses against the top of the workpiece to be processed, it can adapt to workpieces with different heights. The clamping mechanism can also be adapted to workpieces with different heights and thicknesses by adjusting the combined action of the pressing part and the supporting part. Therefore, the center hole clamp of the vertical lathe has self-centering and product versatility, and due to the action of the dustproof seal, cast iron can be prevented from entering the interior of the chuck, preventing the chuck from being stuck, worn, and damaged, that is, there is no need to frequently replace the four-jaw chuck, which reduces a lot of economic costs, as well as the time and manpower consumed when replacing the four-jaw chuck. The four-jaw chuck of the vertical lathe center hole fixture designed in this application can be used for vertical lathe processing of various products in this process, and the designed fixture can also be suitable for vertical lathe processing of various products in this process, such as products with different inner cavity diameters and total thicknesses.

[0041] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A vertical lathe center hole fixture, characterized in that: include: A self-centering clamping mechanism, wherein the self-centering clamping mechanism is arranged on a base, and the self-centering clamping mechanism comprises an adjusting portion and a clamping portion, wherein the adjusting portion adjusts the clamping portion to extend in or out along the radial direction of the self-centering clamping mechanism; A plurality of clamping mechanisms, the clamping mechanisms are arranged on the base at intervals around the self-centering clamping mechanism, and the positions of the clamping mechanisms are adjustable radially and longitudinally up and down; when the workpiece to be processed is in a clamped state, the clamping portion abuts against the inner side surface of the workpiece to be processed, and the clamping mechanism presses against the end surface of the workpiece to be processed; The adjusting portion includes an adjusting rod and an adjusting member threadedly matched with the adjusting rod, and the clamping portion includes a slider portion matched with the inclined surface of the adjusting member; when the adjusting rod is adjusted to rotate, the adjusting member rotates in the opposite direction relative to the adjusting rod and rotates upward or downward, and when the adjusting member moves upward or downward, it drives the slider portion to extend in or out along the radial direction of the self-centering clamping mechanism; The adjusting member is provided with a T-shaped slot, the slider is provided with a T-shaped portion accommodated in the T-shaped slot, the T-shaped portion has a first inclined surface and a second inclined surface, the T-shaped slot is provided with a third inclined surface matched with the first inclined surface and a fourth inclined surface matched with the second inclined surface, wherein the first inclined surface and the second inclined surface are located on opposite sides of the T-shaped portion, and the third inclined surface and the fourth inclined surface are located on two opposite side surfaces of the T-shaped slot; The self-centering clamping mechanism further comprises a shell, the shell comprises a top cover, a bottom cover, and a side surface, the adjusting rod passes through the top cover of the shell and is connected to the bottom cover of the shell, the adjusting member is located inside the shell, and the sliding block extends through the side surface of the shell and extends into or out of the shell perpendicularly; The top surface of the top cover of the housing is provided with a sealing groove around the circumference of the adjusting rod, and a dustproof seal is accommodated in the sealing groove, the inner side of the dustproof seal presses against the side wall of the adjusting rod, and the outer side of the dustproof seal presses against the side wall of the sealing groove; The adjusting rod comprises a first portion connected to the top cover, a second portion connected to the bottom cover, and a third portion located between the first portion and the second portion, wherein the diameter of the third portion is larger than that of the first portion and the second portion; a first axial stop block is provided at abutment between the top cover and the third portion, and a second axial stop block is provided at abutment between the bottom cover and the second portion; Each of the clamping mechanisms comprises a pressing plate portion for pressing the top of the workpiece to be processed, and a slide groove cooperating with the pressing plate portion is provided on the base, and the pressing plate portion slides relative to the base along the slide groove; The pressing plate portion comprises a pressing portion which can be adjusted up and down.

2. The center hole fixture for a vertical lathe according to claim 1, characterized in that: The clamping part further comprises a sliding base slidably connected to the base, and a clamping claw connected to the sliding base, wherein the clamping claw is connected to the sliding block part.

3. The center hole fixture for a vertical lathe according to claim 1, characterized in that: Each of the clamping mechanisms further comprises a supporting portion for supporting the bottom of the workpiece to be processed, and the base is provided with a plurality of groups of connecting holes cooperating with the supporting portion, and the plurality of groups of connecting holes are distributed radially.

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