Thread grinder for tap production

Abstract

This utility model discloses a thread grinding machine for tap production, including a bed, a drive assembly, a grinding assembly, a workpiece clamping assembly, and a cooling assembly. The drive assembly feeds the workpiece; in the grinding assembly, a servo motor drives the grinding wheel spindle and the forming grinding wheel for grinding; the workpiece clamping assembly's elastic sleeve and annular positioning boss ensure the workpiece is clamped and positioned; and the cooling assembly's atomizing jet array and coolant channels efficiently cool the grinding area. This utility model improves the accuracy and surface quality of tap thread processing, extends the grinding wheel's service life, and solves the problem of ineffective cooling in existing thread grinding machines.

Description

Technical Field

[0001] This utility model belongs to the field of tap processing and manufacturing, and specifically relates to a thread grinding machine for tap production. Background Technology

[0002] As a key tool in thread machining, the manufacturing precision of taps directly affects the quality of thread processing. Thread grinding machines, commonly used in tap manufacturing, suffer from the following technical defects when machining high-speed steel: traditional thread grinding machines use a single nozzle for directional cooling, resulting in limited coverage and insufficient cooling efficiency. The temperature in the grinding zone easily exceeds 60°C, causing secondary quenching brittleness in the high-speed steel material due to high temperature, thus reducing tap lifespan. Therefore, how to mitigate or at least alleviate these problems or defects by providing new or otherwise improved thread grinding machine structures is a pressing issue that needs to be addressed. Utility Model Content

[0003] The purpose of this invention is to provide a thread grinding machine for tap production, so as to solve the above-mentioned problems existing in the prior art.

[0004] This utility model discloses a thread grinding machine for tap production, comprising: a bed; a drive assembly disposed at the end of the bed for feeding the workpiece to be processed; a grinding assembly comprising a servo motor disposed on the bed, a grinding wheel spindle driven by the servo motor, and a forming grinding wheel assembled at the front end of the grinding wheel spindle; a workpiece clamping assembly disposed at the front end of the spindle for clamping the workpiece to be processed; and a cooling assembly comprising an atomizing spray array arranged circumferentially around the forming grinding wheel and a coolant channel disposed around the grinding wheel spindle, wherein the spraying direction of the atomizing spray array and the coolant channel is towards the contact area between the forming grinding wheel and the workpiece.

[0005] Furthermore, the drive assembly includes a drive motor, which is connected to the spindle via a transmission component. The drive motor provides power for the movement of the transmission component, thereby enabling the spindle to move. Furthermore, the transmission component includes a sliding groove formed on the bed, with a matching sliding seat positioned above the sliding groove. The stable sliding of the sliding seat within the sliding groove ensures the smoothness and precision of the spindle's movement, thereby ensuring the accuracy of workpiece feeding.

[0006] Furthermore, the workpiece clamping assembly includes an elastic sleeve installed at the front end of the spindle. The workpiece clamping part inside the elastic sleeve is provided with an annular positioning boss. The annular positioning boss can accurately position the workpiece. Combined with the clamping action of the elastic sleeve, it can effectively prevent the workpiece from shaking during the grinding process and improve the machining accuracy.

[0007] Furthermore, the atomizing spray array includes atomizing nozzles arranged in a ring array, with the axial spacing between adjacent atomizing nozzles being 1 / 3 to 1 / 2 of the width of the grinding wheel. This arrangement ensures that the coolant is sprayed evenly and efficiently onto the grinding area, promptly removing heat, reducing the temperature of the grinding wheel and the workpiece, reducing wear, and improving the surface quality of the machined surface.

[0008] Furthermore, both the coolant channel and the atomizing jet array have their inlets connected to the coolant tank, which is used to provide the required coolant through the coolant channel and the atomizing jet array.

[0009] The beneficial effects of this utility model are as follows: This utility model discloses a uniquely designed cooling assembly for a thread grinding machine used in tap production. The coolant channel surrounds the grinding wheel spindle, and the atomizing spray array is arranged circumferentially, both facing the contact area between the forming grinding wheel and the workpiece. Combined with atomizing nozzles with reasonable spacing, it achieves all-round, multi-angle, and uniform cooling coverage. Furthermore, the coolant tank provides a stable supply of coolant, ensuring a continuous cooling process. This allows for the rapid removal of grinding heat, effectively preventing local overheating, reducing workpiece deformation and grinding wheel wear, and improving machining accuracy, grinding wheel life, and the quality and efficiency of tap production. Attached Figure Description

[0010] Figure 1 This is a top view of a thread grinding machine for tap production according to this utility model; Figure 2 This is a schematic diagram of the overall structure of a novel thread grinding machine for tap production according to this utility model; Figure 3 This is a detailed structural diagram of the present invention; Figure 4 for Figure 3 Enlarged view of section A; Figure 5 This is a detailed structural diagram of the present invention from another angle; Figure 6 for Figure 5 Enlarged view of section B in the middle.

[0011] The meanings of the markings in the attached diagram are as follows: 1. Bed; 2. Drive assembly; 21. Drive motor; 22. Transmission component; 221. Sliding groove; 222. Sliding seat; 23. Spindle; 3. Grinding assembly; 31. Servo motor; 32. Grinding wheel spindle; 33. Forming grinding wheel; 4. Workpiece clamping assembly; 41. Jacket; 42. Annular positioning boss; 5. Cooling assembly; 51. Atomizing spray array; 511. Atomizing nozzle; 52. Coolant channel; 53. Coolant tank. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0014] All terms used herein (including technical and scientific terms) have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0015] In the embodiments, by Figure 1-6 The present invention discloses a thread grinding machine for tap production, which mainly consists of a bed 1, a drive assembly 2, a grinding assembly 3, a workpiece clamping assembly 4, and a cooling assembly 5. The bed 1 serves as the basic support component of the entire grinding machine, providing a mounting platform for the other components. During operation, the drive assembly 2 feeds the workpiece to be processed, the grinding assembly 3 performs thread grinding on the workpiece using a shaped grinding wheel 33, the workpiece clamping assembly 4 ensures the workpiece is securely held, and the cooling assembly 5 cools and lubricates the grinding area to ensure grinding quality and efficiency.

[0016] In drive assembly 2, drive motor 21 is a high-precision servo motor, characterized by fast response speed and high control accuracy, enabling precise control of the spindle 23's movement. Drive motor 21 is connected to spindle 23 via transmission component 22, which includes a sliding groove 221 formed on the bed 1 and a sliding seat 222 positioned above the sliding groove 221. The sliding groove 221 has a dovetail groove structure, and the bottom of the sliding seat 222 is designed with a dovetail block matching the dovetail groove. This structure effectively improves the stability and accuracy of the sliding seat 222 within the sliding groove 221. Drive motor 21 is connected to a transmission screw via a coupling. The transmission screw passes through the sliding seat 222 and engages with a nut seat on the sliding seat 222. When drive motor 21 rotates, it drives the transmission screw to rotate, thereby causing the sliding seat 222 to move linearly within the sliding groove 221, achieving precise movement of spindle 23.

[0017] In the grinding assembly 3, the servo motor 31 is mounted on a fixed bracket on the bed 1 and connected to the grinding wheel spindle 32 via belt drive. The grinding wheel spindle 32 is supported by high-precision rolling bearings, ensuring its rotational accuracy and stability. The forming grinding wheel 33 is assembled to the front end of the grinding wheel spindle 32 via a positioning surface and a locking nut, ensuring the coaxiality of the forming grinding wheel 33 and the grinding wheel spindle 32. Before installing the forming grinding wheel 33, it needs to be statically and dynamically balanced to reduce vibration during the grinding process and improve grinding quality.

[0018] In the workpiece clamping assembly 4, the elastic sleeve 41 is installed in the mounting hole at the front end of the spindle 23 and fixed by a threaded connection. The elastic sleeve 41 is made of high-elasticity alloy steel, which has good elasticity and wear resistance. The workpiece clamping part inside the elastic sleeve 41 is provided with an annular positioning boss 42. The inner diameter of the annular positioning boss 42 matches the outer diameter of the workpiece to be processed, which can accurately position the workpiece. When clamping the workpiece, the workpiece is inserted into the elastic sleeve 41, and pressure is applied to the elastic sleeve 41 from the outside, causing its inner diameter to contract, thereby firmly clamping the workpiece.

[0019] In the cooling assembly 5, the atomizing spray array 51 includes atomizing nozzles 511 arranged in a ring array. The axial spacing between adjacent atomizing nozzles 511 is set to 1 / 3 to 1 / 2 of the width of the grinding wheel. In this embodiment, it is preferably 1 / 3 of the width of the grinding wheel to ensure that the coolant can be uniformly sprayed onto the contact area between the forming grinding wheel 33 and the workpiece. The atomizing nozzles 511 adopt the principle of air atomization, mixing compressed air with coolant to atomize the coolant into fine particles, thereby increasing the coverage area and cooling effect of the coolant. The coolant channel 52 is arranged around the grinding wheel spindle 32 with the spray nozzle facing the contact area between the forming grinding wheel 33 and the workpiece. Its interior is a spiral channel, which enables the coolant to form a spiral flow within the channel, enhancing the cooling effect. Both the coolant channel 52 and the atomizing spray array 51 are connected to the coolant tank 53 through pipes. The coolant tank 53 is equipped with a coolant pump for pumping coolant into the coolant channel 52 and the atomizing spray array 51.

[0020] The specific working process of this utility model is as follows: During operation, drive assembly 2 starts first. When drive motor 21 rotates, it drives transmission screw to rotate. The transmission screw passes through sliding seat 222 and engages with nut seat on sliding seat 222, causing sliding seat 222 to move linearly within the dovetail groove structure sliding groove 221 on bed 1, thereby achieving precise movement of spindle 23. Then, the workpiece is clamped and inserted into elastic sleeve 41. The elastic sleeve 41 has an annular positioning boss 42 that clamps the workpiece. Subsequently, external pressure is applied to elastic sleeve 41, causing its inner diameter to contract, thereby firmly clamping the workpiece and ensuring stable clamping during processing.

[0021] Finally, the forming grinding wheel 33 is assembled onto the front end of the grinding wheel spindle 32. Static and dynamic balancing tests were performed before installation to reduce vibration during grinding. The servo motor 31 is started, driving the grinding wheel spindle 32 and the forming grinding wheel 33 to rotate at high speed, performing thread grinding on the workpiece fed by the drive assembly 2. Simultaneously, the cooling assembly 5 operates, with the coolant pump in the coolant tank 53 pumping coolant into the coolant channel 52 and the atomizing spray array 51. The atomizing nozzles 511 of the atomizing spray array 51 use the principle of air atomization, mixing compressed air with coolant to atomize the coolant into fine particles, which are then evenly sprayed onto the contact area between the forming grinding wheel 33 and the workpiece. The coolant channel 52 is arranged around the grinding wheel spindle 32, with the spray nozzles facing the contact area, effectively cooling and lubricating the grinding area to ensure grinding quality and efficiency. After grinding, the workpiece is removed, and the thread machining is complete.

[0022] In summary, the cooling assembly of this utility model for a thread grinding machine used in tap production adopts a unique design. The coolant channel surrounds the grinding wheel spindle, and the atomizing spray array is arranged circumferentially, both facing the contact area between the forming grinding wheel and the workpiece. Combined with atomizing nozzles with reasonable spacing, it achieves all-round, multi-angle, and uniform cooling coverage. Furthermore, the stable supply of coolant through the coolant tank ensures a continuous cooling process, which can quickly remove grinding heat, effectively avoid local overheating, reduce workpiece deformation and grinding wheel wear, and improve machining accuracy, grinding wheel life, and tap production quality and efficiency.

[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thread grinding machine for tap production, characterized in that, include: Bed frame (1); The drive assembly (2) is located at the end of the bed (1) and is used to realize the feeding function of the workpiece to be processed; The grinding assembly (3) includes a servo motor (31) mounted on the bed (1), a grinding wheel spindle (32) driven by the servo motor (31), and a forming grinding wheel (33) mounted on the front end of the grinding wheel spindle (32). The workpiece clamping assembly (4) is located at the front end of the spindle (23) and is used to clamp the workpiece to be processed; The cooling assembly (5) includes an atomizing jet array (51) arranged circumferentially around the forming grinding wheel (33) and a coolant channel (52) arranged around the grinding wheel spindle (32), the jetting direction of the atomizing jet array (51) and the coolant channel (52) being toward the contact area between the forming grinding wheel (33) and the workpiece.

2. The thread grinder for tap production according to claim 1, characterized in that: The drive assembly (2) includes a drive motor (21), which is connected to the main shaft (23) via a transmission component (22). The drive motor (21) provides power for the movement of the transmission component (22) to realize the movement of the main shaft (23).

3. The thread grinder for tap production according to claim 2, characterized in that: The transmission component (22) includes a sliding groove (221) formed on the bed (1), and a matching sliding seat (222) is provided above the sliding groove (221).

4. The thread grinder for tap production as set forth in claim 1, wherein: The workpiece clamping assembly (4) includes an elastic sleeve (41) installed at the front end of the spindle (23), and the workpiece clamping part inside the elastic sleeve (41) is provided with an annular positioning boss (42).

5. The thread grinder for tap production as set forth in claim 1, wherein: The atomizing jet array (51) includes atomizing nozzles (511) arranged in a ring array, with the axial spacing between adjacent atomizing nozzles (511) being 1 / 3 to 1 / 2 of the width of the grinding wheel.

6. The thread grinder for tap production as set forth in claim 1, wherein: The coolant channel (52) and the atomizing jet array (51) are both connected to the coolant tank (53) at their inlets, providing the required coolant to the coolant channel (52) and the atomizing jet array (51).

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