A thermal error compensation device for CNC machine tools

Abstract

The utility model relates to the technical field of numerical control machine tools, in particular to a thermal error compensation device for numerical control machine tools. By designing a thermal error compensation device for numerical control machine tools, a compensation mechanism in the device is used to compensate the spindle of the numerical control machine tool, thereby solving the problem that the existing thermal error compensation device is complicated to install and operate, and inconvenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control machine tools, in particular to a thermal error compensation device for numerical control machine tools. Background Art

[0002] The thermal error of CNC machine tools is caused by thermal deformation of machine tool components due to the action of internal and external heat sources. The existing thermal error compensation devices still have shortcomings. Specifically, the installation and operation of the existing thermal error compensation devices are cumbersome and inconvenient to use.

[0003] Therefore, a thermal error compensation device for a CNC machine tool is needed to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to provide a thermal error compensation device for a numerically controlled machine tool to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A thermal error compensation device for a numerically controlled machine tool comprises a mounting sleeve, a compensation mechanism is arranged inside the mounting sleeve, and a rubber sealing pad is installed on the outer wall of the mounting sleeve;

[0007] The compensation mechanism includes a cooling fin fixedly connected to the inner wall of the mounting sleeve, an outer baffle is installed on the inner wall of the mounting sleeve near the cooling fin, an air intake sleeve is rotatably connected on both sides of the outer wall of the mounting sleeve, an air intake pipe is fixedly connected to the inside of the air intake sleeve, an air intake groove is opened on the inner wall of the mounting sleeve, a sealing ring is fixedly connected to the inner wall of the air intake sleeve and on both sides of the air intake groove, an exhaust pipe is fixedly connected to the inner wall of the mounting sleeve and on the side away from the intake pipe, a one-way valve is installed inside the exhaust pipe, an inner baffle is fixedly connected to the outer wall of the cooling fin near the outer baffle, and connecting screws are threadedly connected to the outer wall of the air intake sleeve and on the front and back sides of the mounting sleeve.

[0008] As a preferred solution of the utility model, the mounting sleeve is made of aluminum alloy, the shape of the mounting sleeve is compatible with the shape of the CNC machine tool spindle, the mounting sleeve and the compensation mechanism are provided in two groups, and the two groups of mounting sleeves are connected by fixing bolts.

[0009] As a preferred solution of the utility model, the air intake sleeve, outer baffle and inner baffle are all made of thermal insulation materials, the shapes of the cooling fins, outer baffle and inner baffle are all adapted to the shape of the mounting sleeve, and the air intake pipe passes through and extends outside the mounting sleeve.

[0010] As a preferred solution of the utility model, the cooling fins are made of copper, the outer baffles and the inner baffles are provided in multiple groups, and the connection mode between the sealing ring and the mounting sleeve is a rotational connection.

[0011] As a preferred solution of the utility model, the sealing ring is made of silicone, and the connecting screw penetrates and extends to the outside of the air inlet sleeve.

[0012] As a preferred solution of the utility model, the one-way valve only allows gas to flow out of the exhaust pipe, and the air intake sleeve is designed as a semi-annular structure.

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

[0014] 1. In the utility model, a thermal error compensation device for a CNC machine tool is designed, and the compensation mechanism in the device is used to compensate the spindle of the CNC machine tool. The connecting screw is removed, the air intake sleeve on the outer wall of the mounting sleeve is separated, the fixing screw in the mounting sleeve is unscrewed and the two sets of mounting sleeves are separated, the separated mounting sleeves are placed on the spindle of the CNC machine tool, the fixing screw is screwed on, the mounting sleeve is fixed on the spindle of the CNC machine tool, and then the air intake sleeve is placed on the outer wall of the mounting sleeve, so that the air intake pipe in the air intake sleeve is aligned with the air intake groove of the mounting sleeve, and the outer wall of the mounting sleeve is fixed by the connecting screw. The air intake sleeves of the walls are connected together, and the air intake sleeve is fixed on the outer wall of the mounting sleeve. When the CNC machine tool spindle rotates, the CNC machine tool spindle will drive the mounting sleeve to rotate together, and inject cold air into the air intake sleeve through the air intake pipe. The cold air in the air intake sleeve flows into the mounting sleeve along the air intake groove, and the cold air in the mounting sleeve flows along the outer baffle and the inner baffle. The flowing cold air absorbs the heat of the spindle through the cooling plate, so that the temperature of the spindle drops, and the cold air that absorbs the heat is discharged through the exhaust pipe, which solves the problems of cumbersome installation and operation and inconvenient use of the existing thermal error compensation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 It is a front cross-sectional view of the utility model;

[0017] Figure 3 It is a top cross-sectional view of the utility model.

[0018] In the figure: 1. Installation sleeve; 2. Compensation mechanism; 3. Rubber sealing pad; 201. Cooling fin; 202. External baffle; 203. Inlet sleeve; 204. Inlet pipe; 205. Inlet groove; 206. Sealing ring; 207. Exhaust pipe; 208. One-way valve; 209. Internal baffle; 210. Connecting screw. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0021] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may also be a central element. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] For examples, see Figure 1-3 , the utility model provides a technical solution:

[0024] A thermal error compensation device for a numerically controlled machine tool comprises a mounting sleeve 1, a compensation mechanism 2 is arranged inside the mounting sleeve 1, and a rubber sealing pad 3 is installed on the outer wall of the mounting sleeve 1;

[0025] The mounting sleeve 1 is made of aluminum alloy, and the shape of the mounting sleeve 1 is adapted to the shape of the CNC machine tool spindle. Two sets of mounting sleeves 1 and compensation mechanism 2 are provided, and the two sets of mounting sleeves 1 are connected by fixing bolts.

[0026] In this embodiment, reference Figure 2 and Figure 3The compensation mechanism 2 includes a cooling fin 201 fixedly connected to the inner wall of the mounting sleeve 1, an outer baffle 202 is installed on the inner wall of the mounting sleeve 1 and near the cooling fin 201, an air intake sleeve 203 is rotatably connected on both sides of the outer wall of the mounting sleeve 1, an air intake pipe 204 is fixedly connected inside the air intake sleeve 203, an air intake groove 205 is opened on the inner wall of the mounting sleeve 1 and in the air intake sleeve 203, a sealing ring 206 is fixedly connected to the inner wall of the air intake sleeve 203 and on both sides of the air intake groove 205, an exhaust pipe 207 is fixedly connected to the inner wall of the mounting sleeve 1 and on the side away from the air intake pipe 204, a one-way valve 208 is installed inside the exhaust pipe 207, an inner baffle 209 is fixedly connected to the outer wall of the cooling fin 201 and near the outer baffle 202, and a connecting screw 210 is threadedly connected to the outer wall of the air intake sleeve 203 and on the front and back sides of the mounting sleeve 1;

[0027] The air intake sleeve 203, the outer baffle plate 202 and the inner baffle plate 209 are all made of thermal insulation materials, the shapes of the cooling fins 201, the outer baffle plate 202 and the inner baffle plate 209 are all compatible with the shape of the mounting sleeve 1, the air intake pipe 204 passes through and extends to the outside of the mounting sleeve 1, the cooling fins 201 are made of copper, the outer baffle plate 202 and the inner baffle plate 209 are provided with multiple groups, the sealing ring 206 is connected to the mounting sleeve 1 by rotation, the sealing ring 206 is made of silicone, the connecting screw 210 passes through and extends to the outside of the air intake sleeve 203, the one-way valve 208 only allows the gas to flow out of the exhaust pipe 207, the air intake sleeve 203 is designed as a semi-annular structure, remove the connecting screw 210, separate the air intake sleeve 203 from the outer wall of the mounting sleeve 1, unscrew the fixing screws in the mounting sleeve 1 and separate the two groups of mounting sleeves 1, and place the separated mounting sleeves 1 On the spindle of the CNC machine tool, tighten the fixing screws to fix the mounting sleeve 1 on the spindle of the CNC machine tool, then place the air intake sleeve 203 on the outer wall of the mounting sleeve 1, align the air intake pipe 204 in the air intake sleeve 203 with the air intake groove 205 of the mounting sleeve 1, use the connecting screw 210 to connect the air intake sleeve 203 on the outer wall of the mounting sleeve 1 together, and fix the air intake sleeve 203 on the outer wall of the mounting sleeve 1. When the spindle of the CNC machine tool rotates, the CNC The controlled machine tool spindle will drive the installation sleeve 1 to rotate together, and inject cold air into the intake sleeve 203 through the intake pipe 204. The cold air in the intake sleeve 203 flows into the installation sleeve 1 along the intake groove 205. The cold air in the installation sleeve 1 will flow along the outer baffle plate 202 and the inner baffle plate 209. The flowing cold air will absorb the heat of the spindle through the cooling plate 201, so that the temperature of the spindle will drop, and the cold air that absorbs the heat will be discharged through the exhaust pipe 207.

[0028] The working process of the utility model is as follows: when the thermal error compensation device for a CNC machine tool designed by the present invention is in operation, the connecting screw 210 is removed, the air intake sleeve 203 on the outer wall of the mounting sleeve 1 is separated, the fixing screws in the mounting sleeve 1 are unscrewed and the two sets of mounting sleeves 1 are separated, the separated mounting sleeves 1 are placed on the spindle of the CNC machine tool, the fixing screws are screwed on, the mounting sleeve 1 is fixed on the spindle of the CNC machine tool, and the air intake sleeve 203 is placed on the outer wall of the mounting sleeve 1, the air intake pipe 204 in the air intake sleeve 203 is aligned with the air intake groove 205 of the mounting sleeve 1, and the mounting sleeve 1 is mounted with the connecting screw 210. The air intake sleeve 203 on the outer wall of the mounting sleeve 1 is connected together, and the air intake sleeve 203 is fixed on the outer wall of the mounting sleeve 1. When the spindle of the CNC machine tool rotates, the spindle of the CNC machine tool will drive the mounting sleeve 1 to rotate together, and inject cold air into the air intake sleeve 203 through the air intake pipe 204. The cold air in the air intake sleeve 203 flows into the mounting sleeve 1 along the air intake groove 205. The cold air in the mounting sleeve 1 will flow along the outer baffle 202 and the inner baffle 209. The flowing cold air will absorb the heat of the spindle through the cooling plate 201, so that the temperature of the spindle will drop, and the cold air that has absorbed the heat will be discharged through the exhaust pipe 207.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thermal error compensation device for a numerically controlled machine tool, comprising a mounting sleeve (1), characterized in that: A compensation mechanism (2) is arranged inside the installation sleeve (1), and a rubber sealing pad (3) is installed on the outer wall of the installation sleeve (1); The compensation mechanism (2) comprises a cooling fin (201) fixedly connected to the inner wall of the mounting sleeve (1); an outer baffle (202) is installed on the inner wall of the mounting sleeve (1) and near the cooling fin (201); both sides of the outer wall of the mounting sleeve (1) are rotatably connected to an air intake sleeve (203); an air intake pipe (204) is fixedly connected to the interior of the air intake sleeve (203); an air intake groove (205) is provided on the inner wall of the mounting sleeve (1) and in the air intake sleeve (203); and the inner wall of the air intake sleeve (203) A sealing ring (206) is fixedly connected on both sides of the air inlet groove (205); an exhaust pipe (207) is fixedly connected to the inner wall of the mounting sleeve (1) and on the side away from the air inlet pipe (204); a one-way valve (208) is installed inside the exhaust pipe (207); an inner baffle (209) is fixedly connected to the outer wall of the cooling fin (201) and at a position close to the outer baffle (202); and a connecting screw (210) is threadedly connected to the outer wall of the air inlet sleeve (203) and on the front and back sides of the mounting sleeve (1).

2. The thermal error compensation device for a CNC machine tool according to claim 1, characterized in that: The mounting sleeve (1) is made of aluminum alloy, and the shape of the mounting sleeve (1) is compatible with the shape of the CNC machine tool spindle. The mounting sleeve (1) and the compensation mechanism (2) are both provided in two groups, and the two groups of mounting sleeves (1) are connected by fixing bolts.

3. The thermal error compensation device for a CNC machine tool according to claim 1, characterized in that: The air intake sleeve (203), the outer baffle (202) and the inner baffle (209) are all made of thermal insulation materials; the shapes of the cooling fins (201), the outer baffle (202) and the inner baffle (209) are all compatible with the shape of the mounting sleeve (1); and the air intake pipe (204) passes through and extends to the outside of the mounting sleeve (1).

4. The thermal error compensation device for a CNC machine tool according to claim 1, characterized in that: The cooling fin (201) is made of red copper, the outer baffle (202) and the inner baffle (209) are provided in multiple groups, and the sealing ring (206) is connected to the mounting sleeve (1) in a rotational connection.

5. The thermal error compensation device for a CNC machine tool according to claim 1, characterized in that: The sealing ring (206) is made of silicone, and the connecting screw (210) penetrates and extends to the outside of the air intake sleeve (203).

6. The thermal error compensation device for a CNC machine tool according to claim 1, characterized in that: The one-way valve (208) only allows gas to flow out of the exhaust pipe (207), and the air intake sleeve (203) is designed as a semi-annular structure.

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