Hydraulic protection device of numerical control machine tool for mold machining

Abstract

The utility model discloses a numerical control machine tool hydraulic protection device for die machining, which comprises a cutting device, a supporting device is arranged at the top of the cutting device, and a limiting device is arranged in the middle of the supporting device; the supporting device comprises a supporting cylinder; according to the hydraulic protection device of the numerical control machine tool for mold machining, the hydraulic cylinder is matched with the first spring to drive the cutter to contract, the cutter is instantly driven to break away from a risk area, the situation that the cutter cannot stop rotating at the first time under the action of inertia is avoided, in the process, a motor has sufficient time to stop driving the cutter, and the cutter is protected. The loss of the motor can also be reduced to the minimum; and through the design that the tool apron is clamped at the top of the supporting cylinder by arranging the clamping block, the situation that the tool rises to the highest point and then falls and rebounds again is avoided, the stability of the device during triggering is further improved, after use, the sliding rod is pulled to make contact with the clamping block for limiting, and then the tool apron can be aligned to the limiting base again to facilitate repeated use.

Description

Technical Field

[0001] The utility model belongs to the technical field of the design of hydraulic protection devices for numerically controlled machine tools used in the processing of mining machinery molds, and particularly relates to a hydraulic protection device for numerically controlled machine tools used in mold processing. Background Technique

[0002] The processing of mining machinery molds usually needs to be completed by numerically controlled machine tools with high efficiency. A numerically controlled machine tool is an automated machine tool that controls the relative movement of a tool and a workpiece through pre-programmed computer instructions. It can perform complex processing tasks, improve processing accuracy, efficiency, and consistency.

[0003] Since mining machinery is generally large in size, the molds for mining machinery are mostly of large size. When numerically controlled machine tools process such molds, generally, the required time is long, the cutting steps are numerous, and the possibility of accidents occurring to the tool during cutting is relatively large.

[0004] When the existing hydraulic protection devices of numerically controlled machine tools protect the high-speed rotating tool, they mostly adopt the method of forcibly stopping the rotation of the tool or the motor. This method often fails to stop the tool immediately when the tool rotates at a high speed. At the same time, this method causes relatively large losses to the motor and has low economy. Content of the Utility Model

[0005] The purpose of the utility model is to provide a hydraulic protection device for numerically controlled machine tools used in mold processing to solve the problems existing in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A hydraulic protection device for numerically controlled machine tools used in mold processing includes a cutting device. A support device is arranged on the top of the cutting device, and a limiting device is arranged in the middle of the support device; the support device includes a support cylinder, a connecting ring is fixedly arranged on the upper surface of the support cylinder, a limiting seat is fixedly arranged at the bottom of the support cylinder, a plurality of guide rods are fixedly arranged evenly in a circle on the top of the limiting seat, a plurality of first springs are symmetrically and fixedly arranged on the top of the support cylinder, two first through holes are symmetrically arranged on both sides of the support cylinder, and a second through hole is arranged above the first through hole; the limiting device includes two symmetrically arranged first brackets, a hydraulic cylinder is installed on the top of the first bracket, a blocking block is arranged at the output end of the hydraulic cylinder, a second bracket is arranged above the first bracket, a sliding rod is slidably arranged in the middle of the second bracket, a clamping block is fixedly arranged on the inner side of the sliding rod, and a second spring is fixedly arranged on the outer side of the clamping block.

[0008] Furthermore: The cutting device includes a tool holder, a tool is installed at the bottom of the tool holder, and a motor is installed on the top of the tool holder.

[0009] Further: The tool holder is slidably connected to the guide rod, and the first spring is bolted to the tool holder.

[0010] Further: The limit seat is integrally formed with the support cylinder.

[0011] Further: The first bracket and the second bracket are respectively bolted to the support cylinder, and the stopper and the clamping block are respectively slidably connected to the support cylinder.

[0012] Further: The clamping block has a right trapezoidal cross-section.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. During processing, the first spring in the support cylinder is in a stretched state, continuously applying an upward pulling force to the tool holder. The stopper in the first through hole blocks the tool holder to prevent it from moving upward. When the sensor in the machine tool detects that the tool is under excessive force and is prone to danger or when a person appears within the dangerous range of the tool causing injury, the support hydraulic cylinder of the first bracket contracts, driving the stopper to move along the first through hole, releasing the limit at the top of the tool holder. The first spring pulls the tool holder to rise along the guide rod through its elastic force, causing the tool to quickly disengage from the workpiece and retract into the bottom of the support cylinder. By setting the design of the hydraulic cylinder to respond and cooperate with the first spring to drive the tool to contract, the tool can be instantly driven out of the risk area, preventing the tool from not stopping rotating immediately under the action of inertia. During this process, the motor has sufficient time to stop driving the tool, and the loss of the motor can also be minimized.

[0015] 2. During the rising process of the tool holder, it first squeezes the inclined surface of the trapezoidal clamping block, causing it to move outward along the second through hole and compress the second spring. After the tool holder moves to the top of the support cylinder, the second bracket supports the second spring to push the clamping block back through its elastic force, making it clamp at the bottom of the tool holder to prevent it from falling. By setting the design of the clamping block to clamp the tool holder at the top of the support cylinder, it is possible to prevent the tool from falling and rebounding again after rising to the highest point, further improving the stability of the device when triggered. After use, pulling the sliding rod to contact the limit of the clamping block can realign the tool holder with the limit seat for repeated use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a schematic structural diagram of a hydraulic protection device for a numerical control machine tool used in mold processing according to the present utility model;

[0018] Figure 2 It is a schematic structural diagram of a cutting device of a hydraulic protection device for a numerically controlled machine tool used in mold processing according to the present utility model;

[0019] Figure 3 It is a partial cross-sectional view of a support device of a hydraulic protection device for a numerically controlled machine tool used in mold processing according to the present utility model;

[0020] Figure 4 It is a schematic structural diagram of a limit device of a hydraulic protection device for a numerically controlled machine tool used in mold processing according to the present utility model.

[0021] In the attached drawing reference numerals: 1, cutting device; 101, tool holder; 102, cutting tool; 103, motor; 2, support device; 201, support cylinder; 202, connecting ring; 203, limit seat; 204, guide rod; 205, first spring; 206, first through hole; 207, second through hole; 3, limit device; 301, first bracket; 302, hydraulic cylinder; 303, stop block; 304, second bracket; 305, sliding rod; 306, second spring; 307, clamping block. Detailed implementation manners

[0022] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0023] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0024] Next, in conjunction with the accompanying drawings of the present utility model, the technical solutions of the present utility model will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Please refer to Figures 1 - 4 , a hydraulic protection device for a numerically controlled machine tool used in mold processing, including a cutting device 1, a support device 2 is arranged on the top of the cutting device 1, and a limiting device 3 is arranged in the middle of the support device 2.

[0026] In this embodiment: The cutting device 1 includes a tool holder 101, a tool 102 is installed at the bottom of the tool holder 101, a motor 103 is installed at the top of the tool holder 101, the tool holder 101 is slidably connected to the guide rod 204, and the first spring 205 is bolted to the tool holder 101. During processing, the tool holder 101 supports the motor 103 to drive the tool 102 to rotate, and performs cutting processing on the mold;

[0027] In this embodiment: The support device 2 includes a support cylinder 201, a connection ring 202 is fixedly arranged on the upper surface of the support cylinder 201, a limit seat 203 is fixedly arranged at the bottom of the support cylinder 201, a plurality of guide rods 204 are evenly fixedly arranged on the circumference of the top of the limit seat 203, a plurality of first springs 205 are symmetrically fixedly arranged at the top of the support cylinder 201, two first through holes 206 are symmetrically arranged on both sides of the support cylinder 201, a second through hole 207 is arranged above the first through hole 206, the limit seat 203 and the support cylinder 201 are integrally formed, the connection ring 202 is connected to the axial movement mechanism of the machine tool, the first spring 205 in the support cylinder 201 is in a stretched state, continuously applying an upward pulling force to the tool holder 101, and the first spring 205 pulls the tool holder 101 to rise along the guide rod 204 through the elastic force, so that the tool 102 quickly disengages from the contact with the workpiece and retracts into the bottom of the support cylinder 201. By setting the design of the hydraulic cylinder 302 to respond and cooperate with the first spring 205 to drive the contraction of the tool 102, the tool 102 is instantly driven out of the risk area, avoiding the situation that the tool 102 cannot stop rotating in the first time under the action of inertia. During this process, the motor 103 has sufficient time to stop driving the tool 102, and the loss of the motor 103 can also be minimized;

[0028] In this embodiment: The limiting device 3 includes two symmetrically arranged first brackets 301. A hydraulic cylinder 302 is installed at the top of the first bracket 301. A stopper 303 is arranged at the output end of the hydraulic cylinder 302. A second bracket 304 is arranged above the first bracket 301. A sliding rod 305 is slidably arranged in the middle of the second bracket 304. A clamping block 307 is fixedly arranged inside the sliding rod 305. A second spring 306 is fixedly arranged outside the clamping block 307. The first bracket 301 and the second bracket 304 are respectively bolted to the support cylinder 201. The stopper 303 and the clamping block 307 are respectively slidably connected to the support cylinder 201. The clamping block 307 has a right trapezoidal cross-section. When the sensor in the machine tool detects that the tool 102 is under excessive force and is prone to danger or when a person appears within the dangerous range of the tool 102 causing injury, the first bracket 301 supports the contraction of the hydraulic cylinder 302, driving the stopper 303 to move along the first through-hole 206, releasing the limit at the top of the tool holder 101. During the upward movement of the tool holder 101, it first presses against the inclined surface of the trapezoidal clamping block 307, causing it to move outward along the second through-hole 207 and compress the second spring 306. After the tool holder 101 moves to the top of the support cylinder 201, the second bracket 304 supports the second spring 306 to push the clamping block 307 back by elastic force, making it clamp at the bottom of the tool holder 101 to prevent it from falling. Through the design of setting the clamping block 307 to clamp the tool holder 101 at the top of the support cylinder 201, it avoids the tool 102 from falling and rebounding again after rising to the highest point, further improving the stability when the device is triggered. After use, pulling the sliding rod 305 to release the limit of the clamping block 307 can realign the tool holder 101 with the limit seat 203 for repeated use.

[0029] Working principle: The connecting ring 202 is connected to the axial moving mechanism of the machine tool. During machining, the tool holder 101 supports the motor 103 to drive the tool 102 to rotate for cutting the mold. The first spring 205 in the support cylinder 201 is in a stretched state, continuously applying an upward pulling force on the tool holder 101. The stopper 303 in the first through hole 206 blocks the tool holder 101 to prevent it from moving upward. When the sensor in the machine tool detects that the tool 102 is under excessive force and is prone to danger or when a person appears within the dangerous range of the tool 102 causing injury, the first bracket 301 supports the hydraulic cylinder 302 to contract, driving the stopper 303 to move along the first through hole 206, releasing the top limit of the tool holder 101. The first spring 205 pulls the tool holder 101 to rise along the guide rod 204 through its elastic force, causing the tool 102 to quickly disengage from the workpiece and retract into the bottom of the support cylinder 201. By setting the design of the hydraulic cylinder 302 to respond and cooperate with the first spring 205 to drive the tool 102 to contract, the tool 102 is instantly driven out of the risk area, preventing the tool 102 from failing to stop rotating immediately under the action of inertia. During this process, the motor 103 has sufficient time to stop driving the tool 102, and the loss of the motor 103 can also be minimized. During the rising process of the tool holder 101, it first presses against the inclined surface of the trapezoidal block 307, causing it to move outward along the second through hole 207 and compress the second spring 306. After the tool holder 101 moves to the top of the support cylinder 201, the second bracket 304 supports the second spring 306 to push the block 307 back through its elastic force, causing it to be stuck at the bottom of the tool holder 101 to prevent it from falling. By setting the design of the block 307 to lock the tool holder 101 at the top of the support cylinder 201, it is avoided that the tool 102 rebounds again after rising to the highest point, further improving the stability when the device is triggered. After use, pulling the slide bar 305 to release the limit of the block 307 can realign the tool holder 101 with the limit seat 203 for repeated use.

[0030] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic protection device for a CNC machine tool for mold processing, comprising a cutting device (1), characterized in that: A supporting device (2) is arranged on the top of the cutting device (1), and a limiting device (3) is arranged in the middle of the supporting device (2); The support device (2) comprises a support tube (201), a connection ring (202) is fixedly arranged on the support tube (201), a limit seat (203) is fixedly arranged on the bottom of the support tube (201), a plurality of guide rods (204) are evenly fixedly arranged on the top circumference of the limit seat (203), a plurality of first springs (205) are symmetrically fixedly arranged on the top of the support tube (201), two first through holes (206) are symmetrically arranged on both sides of the support tube (201), and a second through hole (207) is arranged above the first through hole (206); The limiting device (3) comprises two symmetrically arranged first brackets (301), a hydraulic cylinder (302) is installed on the top of the first bracket (301), a stopper (303) is arranged at the output end of the hydraulic cylinder (302), a second bracket (304) is arranged above the first bracket (301), a sliding rod (305) is slidably arranged in the middle of the second bracket (304), a clamping block (307) is fixedly arranged on the inner side of the sliding rod (305), and a second spring (306) is fixedly arranged on the outer side of the clamping block (307).

2. A hydraulic protection device for a CNC machine tool for mold processing according to claim 1, characterized in that: The cutting device (1) comprises a tool holder (101), a tool (102) is mounted on the bottom of the tool holder (101), and a motor (103) is mounted on the top of the tool holder (101).

3. A hydraulic protection device for a CNC machine tool for mold processing according to claim 2, characterized in that: The knife seat (101) is slidably connected to the guide rod (204), and the first spring (205) is bolted to the knife seat (101).

4. The hydraulic protection device for a CNC machine tool for mold processing according to claim 1 is characterized in that: The limiting seat (203) and the supporting tube (201) are integrally formed.

5. The hydraulic protection device for a CNC machine tool for mold processing according to claim 1 is characterized in that: The first bracket (301) and the second bracket (304) are respectively connected to the support tube (201) by bolts, and the stopper (303) and the clamping block (307) are respectively connected to the support tube (201) by sliding.

6. The hydraulic protection device for a CNC machine tool for mold processing according to claim 1, characterized in that: The clamping block (307) has a right-angled trapezoidal cross section.

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